Assembly type building structure installation and construction method

Abstract

The invention relates to the technical field of assembly type building construction, and particularly discloses an assembly type building structure installation construction method which comprises the steps that a building foundation with an anti-floating structure is constructed, and then prefabricated columns, prefabricated floor slabs and prefabricated beam slabs are installed on the anti-floating foundation; the prefabricated columns are inserted and connected into the prefabricated columns on the upper layer through column ribs on the heads, meanwhile, the structures and construction processes of prefabricated beam plates and prefabricated floor slabs are optimized, the prefabrication efficiency is improved, meanwhile, structural form optimization is conducted on the connection portions of the prefabricated parts, and therefore the prefabricated parts are not prone to deformation in the mutual connection process of the prefabricated parts. And in the connecting process of the prefabricated part and the cast-in-place structure, the connecting firmness can be improved, it is guaranteed that the connecting part is safe and reliable, an overall and complete fabricated building overall structure is formed, and construction safety and later use safety are guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of prefabricated factory building construction, and in particular to a prefabricated building structure installation construction method. Background Art

[0002] Prefabricated buildings transfer the traditional on-site pouring, building and construction operations to prefabrication factories. A large number of components in the building structure are produced in batches and on assembly lines in prefabrication factories, and then assembled on-site to complete the construction project, thereby greatly reducing the content of on-site construction operations.

[0003] This method of transferring on-site work to the factory and then transporting it to the construction site for assembly has many advantages, including energy conservation and environmental protection, shortening construction period, saving formwork, saving manpower in construction and reducing construction safety accidents. For example, in terms of energy conservation and environmental protection, it can save 60% of construction water, 20% of materials and 80% of construction waste. In terms of shortening construction period, since the prefabricated components of the building can be made simultaneously, the problem of only being able to construct according to the process during on-site construction is avoided, the waste of time is overcome, and the construction period is greatly shortened. Moreover, a large number of wall panels and prefabricated floor slabs are produced in the factory, which reduces the intensity of on-site construction and even eliminates the masonry and plastering processes, thereby further shortening the overall construction period. In terms of saving formwork, it can reduce the construction of scaffolding and brackets by about 70%, and prefabricated components no longer need to set up formwork for casting, saving a lot of formwork, and no on-site setting is required.

[0004] Prefabricated buildings are prefabricated in factories and then assembled and installed on site through various connection methods to form a complete overall building structure. However, during the construction of prefabricated building structures, there are the following problems: First, in the prefabrication process of the existing assembled structure, due to the unreasonable splitting of the components, the prefabrication efficiency is low, and the connection is inconvenient and the connection is not firm during assembly and installation. Second, during the construction of prefabricated buildings, there are a lot of hoisting operations. The existing hoisting operations have problems such as unreasonable selection of hoisting points and unsafe hoisting of hoists. Third, during the installation and assembly of prefabricated buildings, there are problems with unreasonable connection parts and methods, which leads to weak connection parts, reduces the seismic performance and overall performance of the building structure, affects the construction quality, and causes safety hazards in use.

[0005] The form of prefabricated building structure, how to connect prefabricated building components and the construction process are not only directly related to the quality of prefabricated buildings, but also play an important role in ensuring safe construction on site and improving construction efficiency. Moreover, the structural form of prefabricated components of prefabricated buildings will also affect the installation and construction process of prefabricated building structures. Therefore, in the construction process of prefabricated buildings, in order to ensure the efficiency, safety and building quality of the installation and construction process of prefabricated building structures, the construction process and prefabricated building structures to be adopted are the key issues to be considered in the construction process of prefabricated buildings. The construction process requirements also put forward higher requirements for prefabricated building structures. Summary of the invention

[0006] At least one of the purposes of the present invention is to provide a method for installing and constructing an assembled building structure, in view of the problem that, during the construction process of assembled buildings, the structural design of assembled prefabricated components is unreasonable, resulting in low prefabrication efficiency and weak connection parts that affect the quality and safety of the building structure. The method improves the prefabrication efficiency by optimizing the structure of prefabricated columns and prefabricated floor slabs, and at the same time optimizes the structural form of the connection parts of the prefabricated components, so that the connection firmness can be improved during the process of connecting the prefabricated components to each other and to the cast-in-place structure, ensuring the safety and reliability of the connection parts, forming an overall complete assembled building structure, and ensuring construction safety and safety in later use.

[0007] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention includes the following aspects.

[0008] A method for installing and constructing an assembled building structure includes anti-floating foundation construction, prefabricated column construction, prefabricated floor slab construction and prefabricated beam slab construction. The assembled building structure is formed by installing prefabricated columns on the building foundation, installing prefabricated floor slabs and prefabricated beam slabs on the prefabricated columns, and combining the cast-in-place section construction. The method specifically includes the following construction steps: Step A: construct the building foundation, including the anti-floating foundation, and arrange the foundation steel bars on the top of the anti-floating foundation; Step B: installing a prefabricated column of the bottom layer on the anti-floating foundation, the prefabricated column comprising a prefabricated column head and a prefabricated column tail installed on the anti-floating foundation, column reinforcement is embedded in the prefabricated column, the column reinforcement of the prefabricated column head extends outward from the end, the column reinforcement of the prefabricated column tail is connected to a casting sleeve, the casting sleeve is embedded in the prefabricated column tail, and the end of the casting sleeve is flush with the end of the prefabricated column tail, the foundation steel bar at the top of the anti-floating foundation is inserted into the casting sleeve at the prefabricated column tail, and a grouting hole is also arranged on the outside of the prefabricated column tail, and the grouting hole is communicated with the casting sleeve; Step C: fix the prefabricated columns on the bottom floor using fixing components; Step D: Cast the cast-in-place section of the foundation between the bottom precast columns and the building foundation; Step E: installing a structure of an upper layer on the heads of the precast columns of the bottom layer, including the precast columns, precast floor slabs and precast beam slabs of the upper layer; when installing the precast columns of the upper layer, insert the column reinforcement on the heads of the precast columns of the bottom layer into the casting sleeve connected to the tail of the precast columns of the upper layer; the length of the column reinforcement on the heads of the precast columns of the bottom layer is greater than the depth of the insertion into the casting sleeve, so that the ends of the heads of the precast columns of the bottom layer and the tail ends of the precast columns of the upper layer form a first cast-in-place section; installing the precast floor slabs and precast beam slabs; forming a second cast-in-place section between the precast floor slabs and the precast beam slabs; the two ends of the precast beam slabs are overlapped on the precast columns and cast-connected through the first cast-in-place section; Step F: pouring the first cast-in-place section and the connecting sleeve concrete through the grouting holes, and pouring the second cast-in-place section at the same time; Step G: Repeat the construction of the next layer of prefabricated columns, prefabricated beams and prefabricated floor slabs according to the construction contents of step E and step F to form a complete prefabricated building structure.

[0009] As the main load-bearing component of the prefabricated building, the prefabricated column bears the main load of the upper structure, which is related to the construction safety and later operation and use safety of the entire prefabricated building structure. It is necessary to ensure that the prefabricated column structure has good stability and integrity. The pre-buried column reinforcement in the prefabricated column can ensure its structural strength. At the same time, a casting sleeve is arranged at the tail of the prefabricated column. The column reinforcement at the head of the prefabricated column is inserted into the casting sleeve connected to the tail of the prefabricated column of the upper layer, and concrete is poured through the grouting hole arranged at the tail of the prefabricated column to ensure that the prefabricated columns of the upper and lower layers are firmly connected; at the same time, a casting sleeve is arranged to accurately insert the prefabricated column of the upper layer into the column reinforcement of the head of the prefabricated column of the lower layer, which plays a positioning role and solves the problem that the existing prefabricated building structure is not easy to connect during assembly and installation; the length of the column reinforcement at the head of the prefabricated column is greater than the depth of the insertion into the casting sleeve, so that the end of the head of the prefabricated column of the next layer and the end of the tail of the prefabricated column of the prefabricated column of the upper layer form a first cast-in-place section, and the two layers of prefabricated columns are firmly connected through cast-in-place concrete.

[0010] Furthermore, each casting sleeve is provided with a grouting hole, and all the grouting holes are concentrated on two adjacent sides of the tail of the precast column, so that it is convenient to grout into the casting sleeve and to grout into the first cast-in-place section through the casting sleeve.

[0011] Preferably, the fixing component in step C comprises a telescopic diagonal brace, a connecting piece is pre-buried in the middle of the precast column and close to one end of the precast column head, one end of the diagonal brace is hinged on the connecting piece, and the other end is fixed to the building foundation or the second cast-in-place section. When supporting the precast columns of the bottom layer, the diagonal brace is fixed to the building foundation, and when supporting the precast columns of the second layer and above, the diagonal brace is fixed to the second cast-in-place section.

[0012] By embedding connectors in the prefabricated columns and supporting the prefabricated columns with retractable diagonal braces, the length of the diagonal braces is adjusted through the retractable structure, thereby adjusting the verticality of the prefabricated columns to ensure that the axis of the prefabricated columns is in a vertical state when the diagonal braces support the prefabricated columns.

[0013] Furthermore, the connecting part includes a fixing plate welded to the internal column reinforcement of the prefabricated column, a connecting plate is vertically welded to the fixing plate, one end of the diagonal brace is hinged to the connecting plate, and the other end is welded and fixed to the building foundation or the second cast-in-place section through a steel bar segment embedded in the building foundation or the second cast-in-place column section.

[0014] Preferably, the prefabricated column is also provided with an exhaust hole, which connects the first cast-in-place column section with the air outside the prefabricated column, so as to discharge the air in the closed area when casting the first cast-in-place section in a closed space, thereby ensuring the casting quality and improving the casting density.

[0015] Furthermore, the cross-sectional shape of the precast column is square, the casting sleeve is arranged around the rear end face of the precast column, and a quadrangular cone-shaped casting hole is opened in the middle part of the rear end face of the precast column. One end of the exhaust hole is connected to the outside of the precast column, and the other end is connected to the casting hole.

[0016] By setting a quadrangular cone-shaped casting hole on the end face of the prefabricated tail and connecting the exhaust hole to it, on the one hand, the connection integrity between the prefabricated column and the cast-in-place column section is improved, and on the other hand, sufficient grouting is ensured, so that the bubbles inside the first cast-in-place column section and the casting hole are fully and completely discharged during the grouting process, thereby improving the concrete pouring quality.

[0017] Preferably, in step E, when installing the prefabricated floor slab, a casting sleeve for inserting and connecting the floor slab reinforcement bars at the ends of adjacent prefabricated floor slabs is pre-embedded in the prefabricated floor slab, and a floor slab exhaust hole is also provided at the pre-embedded portion of the casting sleeve of the prefabricated floor slab, one end of the casting sleeve is flush with the end of the prefabricated floor slab, and the other end is connected to the floor slab exhaust hole, so that when two adjacent prefabricated floor slabs are spliced, the floor slab reinforcement bars at one end of the prefabricated floor slab are inserted and installed in the casting sleeve of the adjacent prefabricated floor slab, and the two sides of the prefabricated floor slab are overlapped on the prefabricated beam slab, thereby improving the overall effect of the splicing of the prefabricated floor slabs, ensuring a firm connection, and improving the quality of the prefabricated building; Furthermore, the length of the floor reinforcement at the end of the precast floor slab is greater than the depth inserted into the casting sleeve, so that a third cast-in-place section space of a certain width is formed between the ends of two adjacent precast floor slabs, and the two adjacent precast floor slabs are firmly connected through subsequent cast-in-place concrete.

[0018] Preferably, the floor slab steel bars include floor slab transverse bars arranged along the length direction of the precast floor slab, and floor slab longitudinal bars arranged perpendicular to the floor slab transverse bars, the floor slab transverse bars include first transverse bars and second transverse bars arranged side by side, one end of the first transverse bar extends out of the end of the precast floor slab, and the other end is inserted and connected in the casting sleeve, one end of the second transverse bar is buried in the precast floor slab, and the other end extends out of the end of the precast floor slab arranged with the casting sleeve, when two adjacent precast floor slabs are spliced, the first transverse bar of the second precast floor slab is inserted and connected in the casting sleeve of the first precast floor slab, when pouring concrete, since the casting sleeve is pre-buried and fixed in the precast floor slab, the connection is more firm after the casting sleeve is filled with concrete, thereby further improving the connection strength of the two adjacent precast floor slabs, and forming a denser steel bar structure in the third cast-in-place section, thereby improving the strength of the third cast-in-place section, ensuring the safety of splicing of the precast floor slabs, and thereby improving the bearing capacity of the precast floor slabs.

[0019] Furthermore, the floor reinforcement also includes a plurality of reinforcing ribs arranged side by side, the precast floor includes a concrete layer, each of the reinforcing ribs is partially buried in the concrete layer, each of the reinforcing ribs includes a plurality of frame ribs arranged side by side, two adjacent frame ribs are fixedly connected by a wavy first oblique rib, each frame rib includes a first transverse rib and a second transverse rib arranged in parallel, the first transverse rib and the second transverse rib are connected by a wavy second oblique rib, and all of the first transverse rib and part of the second oblique rib are buried in the concrete layer.

[0020] Furthermore, both ends of the longitudinal reinforcement extend out of the two side surfaces of the precast floor slab, and both ends of the longitudinal reinforcement are hook-shaped structures. The two sides of the precast floor slab are overlapped on the precast beam slab, and the longitudinal reinforcement of the hook-shaped structure is embedded in the cast-in-place concrete, which can improve the connection firmness and ensure the bearing capacity and strength of the precast floor slab.

[0021] Preferably, when hoisting the prefabricated floor slab, four floor slab hoisting points are set on the prefabricated floor slab, and the four floor slab hoisting points are arranged on the reinforcing ribs. The hoisting is connected to the floor slab hoisting points through the slings of the rectangular frame hoisting frame. Arranging the hoisting points on the reinforcing ribs makes it easy to set the hoisting points on the one hand, and can ensure the hoisting safety on the other hand, thus solving the problem of unreasonable hoisting point selection in existing construction operations.

[0022] Preferably, in step E, when installing the precast beams and slabs, the precast beams and slabs are pre-embedded with casting sleeves and beam and slab reinforcements, the casting sleeves are pre-embedded near the ends of the precast beams and slabs, the beam and slab reinforcements extend out of the end faces and side faces of the precast beams and slabs at both ends, the casting sleeves of the precast beams and slabs are used for inserting and connecting the beam and slab reinforcements on the outsides of the ends of adjacent precast beams and slabs, and beam and slab exhaust holes are also provided at the pre-embedded parts of the casting sleeves of the precast beams and slabs, one end of the casting sleeves is flush with the end of the precast beams and slabs, and the other end is connected to the beam and slab exhaust holes, when two adjacent precast beams and slabs are spliced, the beam and slab reinforcements at one end of the precast beams and slabs are inserted and installed in the casting sleeves of the adjacent precast beams and slabs, and the two sides of the precast beams and slabs are spliced ​​with the precast floor slabs to form a second cast-in-place section for pouring concrete for connection, and the beam and slab exhaust holes are used to discharge the air in the casting sleeves during the cast-in-place process.

[0023] In the process of making prefabricated beams and slabs, by pre-embedding casting sleeves in the prefabricated beams and slabs, and inserting and connecting the beam and slab steel bars of adjacent prefabricated beams and slabs into the casting sleeves for concrete pouring, the integrity of the splicing of the prefabricated beams and slabs can be improved, the connection can be firm, and the quality of the prefabricated building can be improved; Furthermore, the length of the steel bars at the ends of the precast beams is greater than the depth of insertion into the casting sleeve, so that a cast-in-place section is formed between the ends of two adjacent precast beams. Normally, two adjacent precast beams are connected by precast columns, and the section between the ends of two adjacent precast beams is the first cast-in-place section. The connection between the two adjacent precast beams and the two adjacent precast columns is achieved through subsequent cast-in-place concrete.

[0024] Preferably, the beam and slab steel bars in the precast beam and slab include beam and slab transverse bars and beam and slab longitudinal bars, the beam and slab transverse bars are arranged along the length direction of the precast beam and the beam and slab longitudinal bars are arranged along the width direction of the precast beam and slab, and the beam and slab transverse bars include a first beam and slab transverse bar and a second beam and slab transverse bar arranged side by side, one end of the first beam and slab transverse bar extends out of the end portion of the precast beam and slab, and the other end is inserted and connected in the casting sleeve, one end of the second beam and slab transverse bar is buried in the precast beam and slab, and the other end extends out of the end portion of the precast beam and slab arranged with the casting sleeve. When two adjacent precast beam and slabs are spliced, the first beam and slab transverse bar of the second precast beam and slab is inserted and connected in the casting sleeve of the first precast beam and slab. When pouring concrete, since the casting sleeve is pre-buried and fixed in the precast beam and slab, the connection is more firm after the casting sleeve is filled with concrete, which further improves the connection strength of the two adjacent precast beam and slabs, ensures the safety of splicing the precast beam and slabs, and thus improves the bearing capacity of the precast beam and slabs.

[0025] Furthermore, when two adjacent precast beams are spliced, the first beam transverse reinforcement of the second precast beam is passed through the column reinforcement of the precast column and then inserted into the casting sleeve connected to the first precast beam, so that the second beam transverse reinforcement is arranged perpendicular to the column reinforcement of the precast column and forms an interval staggered arrangement. By casting the first cast-in-place section, the precast beam and the precast column form an integral structural form.

[0026] Preferably, in step A, the construction of the anti-floating foundation includes the following construction steps: Step A1: Drilling anchor holes according to the length of the anti-floating anchor rod; Step A2: Use a fixing pipe to fix multiple anchor bars, and arrange positioning stirrups on the multiple anchor bars to form an anti-floating anchor rod. The positioning stirrups can ensure that the anchor bars are located in the middle of the anchor hole to avoid problems such as deviation that affect the anti-floating effect of the anchor rod; Step A3: lower the anti-floating anchor rod into the anchor hole and pour the anchor rod mortar; Step A4: construct a foundation cushion layer, and construct a waterproof structure at the position where the anti-floating anchor rod passes through the foundation cushion layer to form a waterproof structure at the end of the anti-floating anchor rod. The waterproof structure at the end of the anti-floating anchor rod includes an expansion water stop ring sleeved on the outside of the anti-floating anchor rod, and a sealing paste layer (polysulfide sealing paste, polyurethane sealing paste, etc.) coated on the expansion water stop ring. The expansion water stop ring can expand when exposed to water to achieve the purpose of effective water stopping. At the same time, the sealing paste layer is coated on the outside to form a double water stopping effect. Step A5: constructing the top reinforcement of the anti-floating anchor rod, including bending the anchor bar into an L shape, embedding it in the bottom plate 409 to be cast, and connecting the foundation transverse reinforcement to the anchor bar, and fixing the foundation reinforcement to the foundation transverse reinforcement. The foundation reinforcement is used to be inserted into the casting sleeve of the precast column when the precast column is installed in the subsequent sequence; Step A6: Cast the base plate.

[0027] By arranging anti-floating anchor rods with a length of 6 to 9 meters in the building foundation of the prefabricated building, the purpose of effective anti-floating can be achieved. At the same time, the prefabricated columns and the anti-floating foundation are connected into an integral structure to improve the structural stability and construction quality of the prefabricated building.

[0028] Preferably, the method for installing and constructing prefabricated building structures also includes construction monitoring, including monitoring of support brackets and lifting machinery, wherein the support bracket monitoring includes bracket displacement monitoring and bracket settlement monitoring, and the lifting machinery monitoring includes offset monitoring. By performing construction monitoring during the installation and construction of the prefabricated building structure, the dynamic conditions of the brackets and formwork supports can be discovered in time, and when it is found that the deformation values ​​of sinking, loosening, deformation and horizontal displacement exceed the allowable values, reinforcement treatment is carried out in time.

[0029] In summary, due to the adoption of the above technical solution, the present invention has at least the following beneficial effects: 1. The construction method of tying the upper surface reinforcement on the reinforcing ribs of the prefabricated floor slab and pouring concrete to form a composite slab is adopted, so that the prefabricated floor slab is used as the template for the cast-in-place concrete surface layer, avoiding the need to set up a separate template, improving the construction efficiency and ensuring the quality of the pouring construction. At the same time, the prefabricated floor slab and the cast-in-place concrete surface layer form an integrated and stable structure, improving the bearing capacity and construction quality of the prefabricated building; 2. The prefabricated building structure installation construction method of this scheme is adopted to split the main components of the building structure, including prefabricated columns, prefabricated beams and prefabricated floor slabs in separate structural forms, and then assemble and install them. In addition, the cast-in-place method is adopted for casting and connection at the connection and intersection parts, so that the structure of each part can be consistent, which greatly improves the prefabrication efficiency, facilitates the connection, and improves the stability and integrity of the connection; 3. By constructing anti-floating anchor rods in the building foundation of the prefabricated building, the purpose of effective anti-floating can be achieved. At the same time, the prefabricated columns and the anti-floating foundation are connected into an integral structure to improve the structural stability and construction quality of the prefabricated building. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of the use of fixed components to support the assembled building structure in the present invention.

[0031] Figure 2 It is a schematic diagram of the reinforcement structure of the prefabricated column in the present invention.

[0032] Figure 3 It is a schematic diagram of the elevation structure of the prefabricated column in the present invention.

[0033] Figure 4 It is a structural schematic diagram of the connection part of two layers of prefabricated columns in the present invention.

[0034] Figure 5 for Figure 3 Schematic cross-section of the CC.

[0035] Figure 6 for Figure 2 Schematic diagram of the cross section of BB.

[0036] Figure 7 for Figure 2 Schematic diagram of the cross section of AA.

[0037] Figure 8 It is a plan view of the prefabricated floor slab in the present invention.

[0038] Fig. 9 for Figure 8 Schematic cross-sectional view of EE.

[0039] Fig.10 for Figure 8 Schematic cross-sectional view of DD.

[0040] Fig.11 It is a structural schematic diagram of the splicing of two adjacent prefabricated floor slabs in the present invention.

[0041] Fig.12 It is a schematic diagram of the reinforcement structure of the prefabricated floor slab in the present invention.

[0042] Fig.13 It is a schematic diagram of the reinforcement structure of another embodiment of the prefabricated floor slab in the present invention.

[0043] Fig.14 This is a schematic diagram of the reinforcement structure of another embodiment of the prefabricated floor slab in the present invention.

[0044] Fig.15 It is a schematic diagram of the connection structure of various components in the building prefabricated component system of the present invention.

[0045] Fig.16 It is a plan view of the prefabricated beam slab in the present invention.

[0046] Fig.17 for Fig.16 Schematic cross-sectional view of FF.

[0047] Fig.18 for Fig.16 Schematic cross-sectional view of GG.

[0048] Fig.19 It is a schematic diagram of the reinforcement structure of the prefabricated beam and slab in the present invention.

[0049] Fig. 20 It is a schematic structural diagram of the anti-floating anchor rod in the present invention.

[0050] Fig.21 for Fig. 20 Schematic cross-sectional view of HH.

[0051] Markings in the figure: 1-precast column, 101-precast column head, 102-precast column tail, 103-column reinforcement, 1031-longitudinal column reinforcement, 1032-circular column reinforcement, 104-precast column hanging ear, 105-grouting hole, 106-slurry outlet hole, 107-exhaust hole, 108-casting hole, 109-fixing component, 1091-diagonal brace, 1092-connector, 1092a-fixing plate, 1092b-connecting plate, 1093-rebar segment, 2-precast beam and slab, 21-beam and slab reinforcement, 211-beam and slab transverse reinforcement, 2111-first beam and slab transverse reinforcement, 2112-second beam and slab transverse reinforcement, 212-beam and slab longitudinal reinforcement, 22-beam and slab surface layer skeleton, 221-skeleton bottom reinforcement, 222-skeleton top reinforcement, 223-skeleton diagonal reinforcement, 201-beam and slab exhaust hole, 202-beam and slab precast layer, 3-precast floor slab, 31-floor slab reinforcement, 301-concrete layer, 302-floor slab exhaust hole, 303-upper panel, 311-floor slab transverse reinforcement, 3111-first transverse reinforcement, 3112-second transverse reinforcement, 312-floor slab longitudinal reinforcement, 313-reinforced bone reinforcement, 314-frame bone reinforcement, 3141-first transverse reinforcement, 3142-second transverse reinforcement, 315-first oblique reinforcement, 316-second oblique reinforcement, 317-upper surface reinforcement, 4-building foundation, 41-anti-floating anchor rod, 401-foundation reinforcement, 402-anchor hole, 403-anchor reinforcement, 404-fixed pipe, 405-positioning stirrup, 406-foundation cushion, 407-expansion water stop ring, 408-sealing paste layer, 409-bottom plate, 410-foundation transverse reinforcement, 5-casting sleeve, 6-first cast-in-place section, 7-second cast-in-place section, 8-third cast-in-place section, 9-floor slab hanging point, 10-cast-in-place foundation section. DETAILED DESCRIPTION

[0052] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments to make the purpose, technical solutions and advantages of the present invention more clearly understood. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Example

[0053] This embodiment shows a building prefabricated component system, such as Figures 1 to 10 As shown, it includes prefabricated columns 1, prefabricated beams and slabs 2 and prefabricated floor slabs 3. The prefabricated columns 1, prefabricated beams and slabs 2 and prefabricated floor slabs 3 are assembled and combined with the casting of cast-in-place sections to form an assembled building.

[0054] like Figures 1 to 8As shown, the prefabricated column 1 includes a prefabricated column head 101 and a prefabricated column tail 102 installed on an anti-floating foundation. When installing the prefabricated column 1, the prefabricated column head 101 is installed upwards for connecting the prefabricated column 1 of the previous layer, or for connecting the prefabricated column 1 of the previous layer and installing the prefabricated beam 2 of the previous layer, as well as installing the prefabricated floor 3 of the previous layer. The prefabricated column tail 102 is used for downward installation for installation on a building foundation 4, or for connecting the prefabricated column 1 of the next layer. Column reinforcement 103 is embedded in the prefabricated column 1. The column reinforcement 103 includes a longitudinal column reinforcement 1031 arranged along the length direction of the prefabricated column 1 and a circle column reinforcement 1032 arranged at intervals along the length direction of the longitudinal column reinforcement 1031. The circle column reinforcement 1032 is arranged more densely near the two ends of the prefabricated column 1, with a spacing of 60 to 80. mm, the arrangement spacing in the middle of the precast column is between 100 and 150 mm, and the column reinforcement 103 of the precast column head 101 extends outward from the end, the column reinforcement 103 of the precast column tail 102 is connected to the casting sleeve 5, the casting sleeve 5 is pre-buried in the precast column tail 102, and the end of the casting sleeve 5 is flush with the end of the precast column tail 102; the cross-sectional shape of the precast column 1 is square, and a precast column hanging ear 104 is also provided on the precast column head 101. The precast column hanging ear 104 adopts a W-shape, and the bending parts at both ends are buried in the precast column head 101. The bending part in the middle is located on the outside of the precast column head, as the hanging part of the hanger during lifting, and a grouting hole 105 is provided on each casting sleeve 5, and all the grouting holes 105 are concentrated on the adjacent two sides of the precast column tail 102. Figure 3 As shown, it is convenient to grout the casting sleeve 5, and to grout the first cast-in-place section 6 through the casting sleeve 5. In order to ensure that the casting sleeve 5 is fully grouted, an exhaust hole 107 is also provided on the prefabricated column 1. The exhaust hole 107 is used to connect the first cast-in-place column section 6 with the air outside the prefabricated column 1. When casting the first cast-in-place column section 6 and the casting sleeve 5, the air in the two casting parts is discharged to the outside to avoid the generation of bubbles and ensure the casting quality. As one of the preferred implementation methods, a grout outlet hole 106 can also be provided on the tail 102 of the prefabricated column. The distance between the grout outlet hole 106 and the casting first cast-in-place column section 6 is greater than The grouting hole 105 is at a distance from the first cast-in-place column section 6. The grouting hole 106 is connected to the internal space of the casting sleeve and leads to the outside of the prefabricated column 1. The grouting hole 106 is provided to facilitate grouting of the casting sleeve 5. When the concrete poured in the casting sleeve 5 and the first cast-in-place section 6 is full, it overflows through the grouting hole 106. The grouting hole 106 may also not be provided. When the concrete in the casting sleeve 5 and the first cast-in-place section 6 is full, the exhaust hole 107 first discharges the gas in the internal space, and then the slurry overflows from the exhaust hole 107, indicating that the concrete in the casting sleeve 5 and the first cast-in-place section 6 is full.

[0055] like Figure 1 and Figure 5 As shown, the casting sleeve 5 is arranged around the end surface of the precast column tail 102, and a quadrangular cone-shaped casting hole 108 is also opened in the middle part of the end surface of the precast column tail 102. One end of the exhaust hole 107 is connected to the outer side of the precast column 1, and the other end is connected to the casting hole 108. The casting hole 108 can not only improve the connection integrity between the precast column 1 and the first cast-in-place column section 6, but also achieve the effect of sufficient air overflow during the casting of the first cast-in-place column section 6, thereby improving the concrete casting quality.

[0056] After the precast column 1 is hoisted in place and before the first cast-in-place column section 6 is cast, the precast column 1 is first fixed by a fixing component 109, the fixing component 109 includes a retractable diagonal brace 1091, a connecting piece 1092 is pre-buried in the middle of the precast column 1 and close to one end of the precast column head 101, one end of the diagonal brace 1091 is hinged on the connecting piece 1092, and the other end is fixed to the building foundation 4 or the second cast-in-place section 7 (the cast-in-place part between the precast beams 2 and 2 and the precast floor slab 3). When supporting the precast column 1 of the bottom floor, the diagonal brace 1091 is fixed to the building foundation 4, and when supporting the second and above floors, the diagonal brace 1091 is fixed to the building foundation 4. When the column 1 is prefabricated, the diagonal brace rod 1091 is fixed on the second cast-in-place section 7, and the connecting piece 1092 includes a fixed plate 1092a welded to the column reinforcement 103 inside the prefabricated column 1, and a connecting plate 1092b is vertically welded on the fixed plate 1092a. The diagonal brace rod 1091 is hinged on the connecting plate 1092b. The diagonal brace rod 1091 is fixed to one end of the building foundation 4 or the second cast-in-place section 7, and is welded and fixed with a steel bar segment 1093 pre-embedded in the building foundation 4 or the second cast-in-place column segment. The diagonal brace rod 1091 is a telescopic structure, and the telescopic method is a hydraulic telescopic rod or a threaded telescopic clamp.

[0057] The length of the precast column 1 is between 3 and 6 meters, the distance between the exhaust hole 107 and the end of the precast column tail 102 is between 500 and 800 mm, and the length of the casting sleeve 5 is between 200 and 400 mm. In the area near the precast column head 101 and the precast column tail 102, the ring column reinforcement 1032 of the column reinforcement 103 is arranged more densely, and the length of the first cast-in-place section 6 is between 800 and 1200 mm.

[0058] like Figure 8 to Figure 15As shown, the prefabricated floor 3 is assembled in a frame surrounded by prefabricated columns 1 and prefabricated beams 2, including a casting sleeve 5 embedded in the end, the casting sleeve 5 is used for inserting and connecting the floor steel bars 31 at the ends of adjacent prefabricated floor slabs 3, and a floor exhaust hole 302 is arranged at the embedded position of the casting sleeve 5, one end of the casting sleeve 5 is flush with the end of the prefabricated floor slab 3, and the other end is connected to the floor exhaust hole 302, so that when two adjacent prefabricated floor slabs 3 are spliced, the floor steel bars 31 at one end of the prefabricated floor slab 3 are inserted and installed in the casting sleeve 5 of the adjacent prefabricated floor slab 3, and the two sides of the prefabricated floor slab 5 are overlapped on the prefabricated beams 2. In the process of making the prefabricated floor slab, by embedding the casting sleeve 5 in the prefabricated floor slab 3 and placing the adjacent prefabricated The floor reinforcement 31 of the floor slab 3 is inserted and connected in the casting sleeve 5 for concrete pouring, which can improve the overall effect of the splicing of the prefabricated floor slab 3, ensure a firm connection, and improve the quality of the prefabricated building. The length of the floor reinforcement at the end of the prefabricated floor slab 3 is greater than the depth of insertion into the casting sleeve 5, so that a third cast-in-place section 8 is formed between the ends of two adjacent prefabricated floor slabs 3. Through subsequent cast-in-place concrete, a firm connection between two adjacent prefabricated floor slabs 3 is further ensured. The prefabricated floor slab 3 is arranged with floor reinforcement 31, and the floor reinforcement 31 includes floor transverse reinforcement 311 arranged along the length direction of the prefabricated floor slab 3, and floor longitudinal reinforcement 312 arranged perpendicular to the floor transverse reinforcement 311. One implementation method is as follows: Fig.12 As shown, the floor transverse rib 311 includes a first transverse rib 3111 and a second transverse rib 3112 arranged side by side, one end of the first transverse rib 3111 extends out of the end of the precast floor 3, and the other end is inserted and connected in the casting sleeve 5, one end of the second transverse rib 3112 is buried in the precast floor 3, and the other end extends out of the end of the precast floor 3 arranged with the casting sleeve 5, when two adjacent precast floor slabs 3 are spliced, the second transverse rib 3112 of the second precast floor slab 3 is inserted and connected in the casting sleeve 5 of the first precast floor slab 3, when pouring concrete, because the casting sleeve 5 is pre-buried and fixed in In the precast slab 3, the connection is more secure after the casting sleeve 5 is filled with concrete, which further improves the connection strength of the two adjacent precast slabs 3, and forms a denser steel structure in the third cast-in-place section 8, which improves the strength of the third cast-in-place section 8, ensures the safety of splicing the precast slab 3, and further improves the bearing capacity of the precast slab 3. Floor slab exhaust holes 302 are set in the precast slab 3. When pouring the third cast-in-place section 8, after the mortar enters the casting sleeve 5, the air in the casting sleeve 5 is discharged through the floor slab exhaust holes 302, thereby ensuring that the mortar fills the casting sleeve 5 and avoids loose connections due to the formation of air holes. The other two ways to set the floor slab transverse reinforcement 311 in the precast slab 3 are as follows: Fig.13 and Fig.14 As shown, Fig.13Only the first transverse rib 3111 is provided, one end of the first transverse rib 3111 extends out of the end of the precast floor slab 3, and the other end is inserted and connected in the casting sleeve 5, and the casting sleeve 5 is pre-buried in the end of the precast floor slab 3. When two precast floor slabs 3 are spliced, the first transverse rib 3111 of the other precast floor slab 3 can be directly inserted into the casting sleeve 5 of the adjacent precast floor slab 3. Fig.14 The transverse ribs 311 of the floor slab in the embodiment include a first transverse rib 3111 and a second transverse rib 3111 arranged side by side, one end of the first transverse rib 3111 extends out of the end of the precast floor slab 3, and the other end is pre-buried in the precast floor slab 3 or extends to the end or extends out of the end, the second transverse rib 3112 is arranged in the same manner as the first transverse rib 3111, one end of which extends out of the end of the precast floor slab 3, and the other end is pre-buried in the precast floor slab 3 or extends to the end or extends out of the end, the length of the first transverse rib 3111 extending out of the end is greater than the length of the second transverse rib 3112 extending out of the end, when two adjacent precast floor slabs 3 are spliced, the first transverse rib 3111 of the second precast floor slab 3 is inserted into the casting sleeve 5 connected to the first precast floor slab 3, when both ends of the first transverse rib 3111 and the second transverse rib 3112 extend out of the end of the precast floor slab 3, it can be regarded as only one type of transverse rib.

[0059] As one of the preferred embodiments, the floor reinforcement 31 also includes a plurality of reinforcing ribs 313 arranged side by side, the precast floor 3 includes a concrete layer 301, each of the reinforcing ribs 313 is partially buried in the concrete layer 301, each of the reinforcing ribs 313 includes a plurality of frame ribs 314 arranged side by side, two adjacent frame ribs 314 are fixedly connected by a wavy first oblique rib 315, each frame rib 314 includes a first transverse rib 3141 and a second transverse rib 3142 arranged in parallel, the first transverse rib 3141 and the second transverse rib 3142 are connected by a wavy second oblique rib 316, all of the first transverse rib 3141 and part of the second oblique rib 316 are buried in the concrete layer 301, and a plurality of reinforcing ribs 313 are arranged side by side in the precast floor 301, which can enhance the strength and bearing capacity of the precast floor 3 on the one hand, and on the other hand, the reinforcing ribs 313 can be used It serves as a supporting skeleton structure for hoisting the precast floor 3 to ensure the safety of hoisting the precast floor 3; the reinforcing bone ribs 313 are partially buried in the concrete layer 301, and the part extending outside the concrete layer is used to bind the upper surface reinforcement 317, which is used to cast the upper panel 303 to form a composite plate structure with the precast floor 3, each reinforcing bone rib 313 is connected by a plurality of frame bone ribs 314 arranged side by side, and the plurality of frame bone ribs 314 arranged side by side and the first transverse reinforcement 3141 and the second transverse reinforcement 3142 in each frame bone rib 314 are connected by wavy oblique reinforcements, and the plurality of frame bone ribs 314 are arranged at equal heights, so that about half of each frame bone rib 314 is pre-buried and cast in the concrete layer 301, which can improve the firmness of the connection between the reinforcing bone ribs 313 and the precast floor 3, and keep the integrity of the composite plate formed by subsequent casting, improve the bearing capacity of the prefabricated building floor, and ensure the quality of the building.

[0060] In addition, both ends of the longitudinal ribs 312 of the precast floor slab 3 extend out of the two side surfaces of the precast floor slab 3, and both ends of the longitudinal ribs 312 of the floor slab are hook-shaped structures. The two sides of the precast floor slab 3 are overlapped on the precast beam slab 2, and the longitudinal ribs 312 of the floor slab with hook-shaped structures are embedded in the cast-in-place concrete, which can improve the connection firmness and ensure the bearing capacity and strength of the precast floor slab. During the construction process, the precast floor slab 3 is hoisted and installed and the position is corrected, and then the upper surface ribs 317 of the precast floor slab 3 are tied and the water and electricity concealed pipes are pre-buried, and the precast floor slab 3 is reset and corrected, and the first casting part is poured and vibrated. Fig.15As shown, the concrete of the second cast-in-place section 7, the third cast-in-place section 8 and the rib layer on the precast floor 3 are formed by splicing the precast beam 3, and the composite floor is formed. The bottom joint of the precast floor 3 is processed and finally maintained after the casting is completed. When hoisting the precast floor 3, a rectangular frame lifting frame is used for hoisting, and four floor lifting points 9 are set on the precast floor 3. The four floor lifting points 9 are specifically arranged on the reinforcing bone ribs 313, so that the lifting rope is vertically connected to the rectangular frame lifting frame through the four floor lifting points 9. This lifting method can avoid the pulling of the lifting rope on the precast floor 3, ensure the hoisting quality and avoid damage. At the same time, the floor lifting points 9 are arranged on the reinforcing bone ribs 313, which is convenient for setting the floor lifting points 9 on the one hand and can ensure the lifting safety on the other hand.

[0061] like Figure 16 to Figure 19 As shown, the building prefabricated component system also includes a prefabricated beam 2, which is installed between two adjacent prefabricated columns 1. A casting sleeve 5 and a beam steel bar 21 are pre-embedded in the prefabricated beam 2. The casting sleeve 5 is pre-embedded near the end of the prefabricated beam 2. The beam steel bar 21 extends from the end faces and side faces of the prefabricated beam 2 at both ends. The casting sleeve 5 is used for inserting and connecting the beam steel bar 21 on the outer side of the end of the adjacent prefabricated beam 2. A beam exhaust hole 201 is also provided at the embedded position of the casting sleeve 5 of the prefabricated beam 2. One end of the casting sleeve 5 is flush with the end of the prefabricated beam 2, and the other end is connected to the beam exhaust hole 201, so that when two adjacent prefabricated beams 2 are spliced, the beam steel bar 21 at one end of the prefabricated beam 2 can be The reinforcement 21 is inserted and installed in the casting sleeve 5 of the adjacent precast beam slabs 2. After the two sides of the precast beam slabs 2 are spliced ​​with the precast floor slabs 3, a second cast-in-place section 7 is formed, which is used for pouring concrete for connection. The beam and slab reinforcement 21 of the adjacent precast beam slabs 2 is inserted and connected through the casting sleeve 5 and then poured with concrete, which can improve the integrity of the splicing of the precast beam slabs 2, ensure a firm connection, and improve the quality of prefabricated buildings; the length of the beam and slab reinforcement 21 at the end of the precast beam slab 2 is greater than the depth of insertion into the casting sleeve 5, so that a cast-in-place section is formed between the ends of the two adjacent precast beam slabs 2, that is, the first cast-in-place section 6 between the precast columns 1, and the connection between the two adjacent precast beam slabs 2 and the two adjacent precast columns 1 is realized through subsequent cast-in-place concrete.

[0062] As one of the preferred embodiments, the beam plate reinforcement 21 in the precast beam plate 2 includes a beam plate transverse reinforcement 211 and a beam plate longitudinal reinforcement 212, wherein the beam plate transverse reinforcement 211 is arranged along the length direction of the precast beam plate 2, and the beam plate longitudinal reinforcement 212 is arranged along the width direction of the precast beam plate 2, and the beam plate transverse reinforcement 211 includes a first beam plate transverse reinforcement 2111 and a second beam plate transverse reinforcement 2112 arranged side by side, and one end of the first beam plate transverse reinforcement 2111 extends out of the precast beam plate 2 The first beam slab transverse reinforcement 2111 of the second precast beam slab 2 is inserted into the casting sleeve 5, and the other end is inserted into the casting sleeve 5. One end of the second beam slab transverse reinforcement 2112 is buried in the precast beam slab 2, and the other end extends out of the end of the precast beam slab 2 arranged with the casting sleeve 5. When two adjacent precast beam slabs 2 are spliced, the first beam slab transverse reinforcement 2111 of the second precast beam slab 2 is inserted into the casting sleeve 5 of the first precast beam slab 2. When pouring concrete, since the casting sleeve 5 is pre-buried and fixed in the precast beam slab 2, the casting sleeve 5 is poured. After being filled with concrete, the connection is firmer, and the connection strength of the two adjacent precast beams 2 is further improved. A denser steel structure is formed in the first cast-in-place section 6, which improves the strength of the first cast-in-place section 6, ensures the safety of splicing the precast beams 2, and further improves the bearing capacity of the precast beams 2. By arranging exhaust holes in the embedded parts of the casting sleeves 5 of the precast beams 2, the air in the casting sleeves 5 can be discharged during the cast-in-place concrete process to avoid the generation of bubbles and other problems that affect the casting quality and the connection strength of the precast beams 2; when the two adjacent precast beams 2 are spliced, the second beam transverse reinforcement 2112 of the second precast beam 2 passes through the column reinforcement 103 of the precast column 1, and is inserted into the casting sleeve 5 connected to the first precast beam 2, so that the second beam transverse reinforcement 2112 and the column reinforcement 103 of the precast column 1 are arranged in an alternate manner. When the first cast-in-place section 6 is cast, the precast beams 2 and the precast columns 1 form an integral structure.

[0063] During the installation process of the precast beam slab 2, the beam slab surface layer is cast after the two sides are spliced ​​with the precast floor slab 3. The precast beam slab 2 includes a beam slab precast layer 202, and the beam slab surface layer is cast on the beam slab precast layer 202. When the beam slab surface layer is cast, beam slab surface layer steel bars are arranged inside, and the beam slab surface layer steel bars are tied to the beam slab surface bar skeleton 22. The beam slab surface layer skeleton 22 is connected to the beam slab steel bar 21. The beam slab surface layer skeleton 22 includes two skeleton bottom bars 221 arranged side by side, and the two skeleton bottom bars 221 are pre-buried in the beam slab precast layer 202, and the two skeleton bottom bars 221 are fixedly connected to the beam slab steel bar 21. The beam slab surface layer skeleton 22 also includes a skeleton top bar 222 for being arranged outside the beam slab precast layer 202. The skeleton top reinforcement 222 is arranged above the middle of the two skeleton bottom reinforcements. The two skeleton bottom reinforcements 221 are connected to the skeleton top reinforcement 222 through two wavy skeleton oblique reinforcements 223. The skeleton bottom reinforcement 221 and the beam and slab transverse reinforcement 211 are arranged side by side. Example

[0064] This embodiment shows a prefabricated building, combined with Figure 1 , Fig.15 , Fig. 20 and Fig.21 As shown, the building prefabricated component system described in Example 1 is assembled and installed, including prefabricated columns 1, prefabricated beams and slabs 2 and prefabricated floor slabs 3. The foundation is first treated to form a building foundation 4 for constructing an assembled building, and foundation steel bars 401 are anchored on the building foundation 4. The prefabricated column 1 is installed through the foundation steel bars 401, and then the prefabricated column 1 is supported and fixed by a fixing component, and the foundation cast-in-place section 10 between the prefabricated column 1 and the foundation steel bars 401 is cast. After the prefabricated column 1 is stabilized, the prefabricated column 1, prefabricated beams and slabs 2 and prefabricated floor slabs 3 are continued to be installed on the prefabricated column 1, and the first cast-in-place section 6, the second cast-in-place section 7 and the third cast-in-place section 8 are cast. This cycle is repeated layer by layer to form a final assembled building.

[0065] When the foundation treatment is performed, it also includes construction to form an anti-floating foundation, which includes a pre-drilled anchor hole 402, and multiple anchor bars 403 are arranged in the anchor hole 402. The multiple anchor bars 403 are fixedly connected to the periphery of a fixed pipe 404. The fixed pipe 404 is a fixed iron pipe with a length of 80-150 mm and a diameter of 28-40 mm. In this embodiment, a φ32×2 iron pipe with a length of L=100 is used to fix the anchor bars 403. The fixing tube 404 is also connected with a positioning stirrup 405, and the whole structure formed by fixing a plurality of anchor bars 403 is inserted into the anchor hole 402, and the positioning stirrup 405 is used to make it located at the center of the anchor hole 402. After grouting the anchor hole 402, an anti-floating anchor rod structure is formed, and then a foundation cushion layer 406 is constructed, and a waterproof structure is constructed at the position where the anti-floating anchor rod passes through the foundation cushion layer 406. The waterproof structure includes an expansion water stop ring 407 sleeved on the outside of the anti-floating anchor rod, and a waterproof structure wrapped around the expansion water stop ring 407. 7, the sealing paste layer 408 (using polysulfide sealing paste, polyurethane sealing paste, etc.), the expansion water stop ring 407 can expand when exposed to water to achieve the purpose of effective water stopping, and at the same time, the sealing paste layer 408 is coated on the outside to form a double water stopping effect. After the waterproof structure is constructed, the construction base plate 409 is cast. Before the casting construction, the anchor bar 403 at the top of the anti-floating anchor rod is first bent into an L shape, and the foundation transverse reinforcement 410 is connected to the anchor bar 403, and the foundation transverse reinforcement 410 is fixedly connected to the foundation transverse reinforcement 401. The foundation reinforcement 401 is used for the installation of the prefabricated column 1 in the process of installing the prefabricated building. The foundation reinforcement 401 is inserted into the casting sleeve 5 connected to the prefabricated column 1. After the foundation reinforcement 401 is fixedly connected, the construction base plate 409 is cast, and the anti-floating anchor rod 41 with a length of 6 to 9 m is arranged in the building foundation 4 of the prefabricated building, which can achieve the purpose of effective anti-floating. At the same time, the prefabricated column 1 is connected to the anti-floating foundation into an integral structure to improve the structural stability and construction quality of the prefabricated building. Example

[0066] This embodiment shows a method for installing and constructing an assembled building structure, which adopts the construction of a building foundation with an anti-floating foundation as in Embodiment 2, and the assembled building structure adopts the construction of a building prefabricated component system as in Embodiment 1, including the construction of an anti-floating foundation, the construction of a prefabricated column 1, the construction of a prefabricated floor slab 3, and the construction of a prefabricated beam slab 2, etc. Figure 1-Figure 21 As shown, the specific construction steps include the following: Step A: constructing a building foundation 4, including an anti-floating foundation, and arranging foundation steel bars 401 on the top of the anti-floating foundation; Step B: Install the prefabricated column 1 of the bottom layer on the building foundation 4, and insert the foundation steel bar 401 on the building foundation 4 into the casting sleeve 5 at the tail 102 of the prefabricated column; Step C: fix the prefabricated column 1 on the bottom layer using the fixing member 109; Step D: Casting the foundation cast-in-place section 10 between the bottom prefabricated column 1 and the building foundation 4; Step E: installing a structure of an upper layer on the precast column head 101 of the bottom layer, including the precast column 1, the precast floor slab 3 and the precast beam slab 2 of the upper layer; when installing the precast column 1 of the upper layer, insert the column reinforcement 103 on the precast column head 101 of the bottom layer into the casting sleeve 5 connected to the precast column tail 102 of the precast column 1 of the upper layer; the length of the column reinforcement 103 of the precast column head 101 is greater than the depth of insertion into the casting sleeve 5, so that the end of the precast column head 101 of the bottom layer and the end of the precast column tail 102 of the precast column 1 of the upper layer form a first cast-in-place section 6; installing the precast floor slab 3 and the precast beam slab 2, forming a second cast-in-place section 7 between the precast floor slab 3 and the precast beam slab 2, and the two ends of the precast beam slab 2 are overlapped on the precast column 1 and cast-connected through the first cast-in-place section 6; Step F: pouring the concrete in the first cast-in-place section 6 and the casting sleeve 5 through the grouting hole 105, and pouring the second cast-in-place section 7 at the same time. Before pouring the second cast-in-place section 7, first tie the upper surface reinforcement 317; Step G: According to the construction contents of step E and step F, the prefabricated columns 1, prefabricated beams 2 and prefabricated floor slabs 3 of the next layer are repeatedly installed to form a complete prefabricated building structure.

[0067] As the main load-bearing component of the prefabricated building, the prefabricated column 1 bears the main load of the upper structure, which is related to the construction safety and later operation and use safety of the entire building structure. The structural stability and integrity of the prefabricated column 1 must be ensured. The embedded column reinforcement 103 in the prefabricated column 1 can ensure its structural strength. At the same time, a casting sleeve 5 is arranged at the tail of the prefabricated column. The column reinforcement 103 of the prefabricated column head 101 is inserted into the casting sleeve 5 connected to the tail 102 of the prefabricated column of the upper layer, and concrete is poured through the grouting hole 105 set at the tail 102 of the prefabricated column to ensure the upper and lower layers of the prefabricated The prefabricated columns 1 are firmly connected; at the same time, a casting sleeve 5 is provided, which can accurately insert the prefabricated columns 5 of the upper layer into the column reinforcement 103 of the prefabricated column head 101 of the lower layer, play a positioning role, and solve the problem that the existing prefabricated building structure is inconvenient to connect during assembly and installation; the length of the column reinforcement 103 of the prefabricated column head 101 is greater than the depth of insertion into the casting sleeve 5, so that the end of the prefabricated column head 101 of the lower layer and the end of the prefabricated column tail 102 of the prefabricated column 1 of the upper layer form a first cast-in-place section 6, and the two layers of prefabricated columns 1 are further firmly connected by post-casting cast-in-place concrete.

[0068] As one of the preferred embodiments, when grouting through the grouting holes 105, grouting is simultaneously performed through all the grouting holes 105 concentrated on the adjacent two sides of the prefabricated column tail 102. This method is convenient for grouting into the casting sleeve 5, and can also improve the grouting efficiency, ensuring that the grouting pressure of each casting sleeve 5 is the same.

[0069] The installation process of prefabricated columns includes the hoisting and grouting of prefabricated columns. The hoisting process of prefabricated columns includes: (1) hoisting prefabricated columns one by one along a direction (such as the horizontal axis or the vertical axis) according to the overall structure of the building foundation, and carrying out the process in a layer-by-layer and section-by-section manner. When the hoisting of the prefabricated columns in one axis direction is completed, the next prefabricated column on the axis direction is hoisted. This method can reduce repeated operations and improve construction efficiency; (2) clean up the debris at the installation site of the prefabricated columns, remove the loose concrete and check the axis of the prefabricated columns to ensure that the axis of the prefabricated columns is perpendicular to the building foundation surface; (3) Check and verify the model, structural dimensions, and embedded parts position of the prefabricated column to prevent wrong lifting or rework; (4) Lifting of the prefabricated column. When the prefabricated column needs to be turned over, lift the prefabricated column lifting lug 104 with a lifting device, place a rubber tire for protection, and slowly lift the height to adjust the prefabricated column from a horizontal state to a vertical state to complete the turning operation of the prefabricated column; (5) Put the prefabricated column in place. When the prefabricated column is lifted to 500 mm from the ground, stop, remove the pads and legs protecting the prefabricated column, clean the mud on the head of the prefabricated column, lift the prefabricated column to the location to be installed, and position it through the foundation steel bars. After being in place, add at least two sets of diagonal braces 1091 of fixing components 109 to temporarily fix the precast column 1; (6) Correction and positioning. First, correct the verticality of the precast column. Use a hanging line board and set up a theodolite in two perpendicular directions to align the vertical axis of the body with the grid axis of the column at the installation position. When correcting the axis, first find the axis on two surfaces, then align it with the axis on the third surface, and finally align the axis or center line on the three surfaces of the column with the positioning axis. After ensuring that the axis position and verticality are correct, grouting is carried out for the cast-in-place section of the foundation; secondly, installation correction and positioning For the middle precast column, the center line of the slightly larger surface of the precast column is used as the standard. After it is in place, it is supported on four sides. Two theodolites are respectively supported on the axes of the two adjacent column surfaces, aligned with the axis of the column body, and the vertical deviation is corrected. When the two theodolites are corrected from two directions, the axes on the other two surfaces are checked. Only when the four sides are firmly supported can the grouting of the cast-in-place section of the foundation be carried out; finally, the side columns and corner columns are installed, corrected and positioned, and the positioning axes of the three surfaces and the axis on the fourth surface are corrected at the same time to ensure that the precast column does not twist, dislocate or deviate; the precast column is positioned and fixed firmly before being unhooked to avoid tipping over.

[0070] The construction process of grouting of precast columns includes: (1) sealing the base, sealing the space between the tail 102 of the precast column and the bottom plate 409 to form a closed space, ensuring that the grouting material fills the casting hole 108 and the casting sleeve 5 under pressure and reaches the density required by the design; (2) grouting, when grouting, stop grouting after the grouting hole 105, the grouting hole 106 and the exhaust hole 107 are all grouting, and maintain pressure for 30-45 seconds to keep the slurry dense; (3) when grouting the first cast-in-place section 6, and when grouting the space of other cast-in-place sections (including the second cast-in-place section 7 and the third cast-in-place section 8) formed by the precast beam slab 2 and the precast floor slab 3, the same requirements must be met.

[0071] When installing the precast floor 3 in step E, a formwork support frame is used for erection, and a support method of steel pipe + top support + square steel pipe keel is adopted. When two adjacent precast floor slabs are spliced, the beam slab transverse reinforcement at one end of the precast floor slab is inserted and installed in the adjacent precast floor slab casting sleeve, and the two sides of the precast floor slab are overlapped on the precast beam slab. The length of the beam slab transverse reinforcement at the end of the precast floor slab is greater than the depth of insertion into the casting sleeve, so that a third cast-in-place section is formed between the ends of the two adjacent precast floor slabs, and the subsequent cast-in-place concrete is further used to ensure that the connection between the two adjacent precast floor slabs is firm. During the construction process, the precast floor slab is hoisted and installed and the position is corrected, and then the precast floor slab surface reinforcement is tied and the water and electricity concealed pipes are pre-buried, and the precast floor slab is reset and corrected, and the second cast-in-place section concrete, the third cast-in-place section concrete and the upper floor slab of the precast beam slab splicing are poured and vibrated to form a composite floor slab, and the bottom joint of the precast floor slab is processed, and finally maintenance is carried out after the pouring is completed.

[0072] The key points of hoisting construction of prefabricated floor slabs include: (1) Erect the support frame, using a fastener-type Φ48×3.2 steel pipe support frame, the main keel of the slab using Φ48×3.6 steel pipe, and the secondary keel using 50*50mm square steel pipe; (2) The secondary keel is arranged perpendicular to the joint direction of the precast floor slab and the precast beam slab. The spacing between the formwork support posts is appropriate, about 1 meter. A scaffolding board is set at the bottom of the post. A sweeping rod is set 20 cm above the ground. The horizontal rod step is 1.5 meters. The horizontal rod is extended by butt fasteners. The connecting fasteners of adjacent horizontal rods are staggered to avoid being in the same longitudinal (transverse) distance. All the joints of the precast floor slab are filled with foamed polyethylene strips. Later, anti-cracking mortar composite mesh cloth is used to fill the bottom plate joints. (3) Sponge strips are pasted on the openings of the precast floor slab perimeter support formwork to prevent leakage, and double-sided tapes are pasted at different locations at the junction of the precast floor slab and the cast-in-place section (including the second cast-in-place section and the third cast-in-place section) to prevent leakage; (4) The elevation deviation of the top of the precast floor support and precast beam shall be based on the elevation of the upper surface of the formwork bottom formwork, and the allowable deviation of the elevation shall be within ±5 mm; (5) Use a laser leveler to check the elevation of the support frame and the top surface of the precast beam. If the elevation of the support frame does not meet the requirements, adjust the adjustable top support of the support frame to meet the requirements. If the elevation of the top of the precast beam does not meet the requirements, check whether the bottom elevation of the precast beam meets the requirements. If not, adjust it to meet the requirements. (6) The demoulding strength shall be as per the table below. As one of the preferred implementation modes, in step E, when two adjacent precast beams are spliced, the beam reinforcement at one end of the precast beam is inserted and installed in the casting sleeve of the adjacent precast beam, and then the precast beam is lengthened by cast-in-place concrete. When the two adjacent precast beams are respectively arranged on both sides of the precast column, a first cast-in-place section is formed between the ends of the two precast beams, and the second cast-in-place section is formed after the two sides of the precast beam are spliced ​​with the precast floor, which is used for pouring concrete for connection to form an assembled building structure.

[0073] The installation operation key points of precast beams and slabs include: (1) In conjunction with the binding of the upper layer reinforcement 317, the precast beams and slabs with a span ≥4m are arched by 0.2% to prevent excessive deflection. The upper end of the beam formwork used for pouring the beam and slab surface layer should be tightened with a locking rod to prevent deformation of the upper end; (2) All precast beam and slab seams ≥2mm are sealed with tape, and the precast beam and slab formwork is laid from both ends of the precast beam and slab to the middle. The inlay wood is arranged in the middle and the cleaning port is set at the end; (3) The bottom strip of the side formwork of beams with a height of ≥300 shall not use nine-piece boards, and the steel pipe top should be fixed and clamped with square wood; if the formwork strip is used for beams with a height of less than 300, its shear strength must be sufficient to avoid collapse during concrete pouring.

[0074] When pouring the foundation cast-in-place section 10, the first cast-in-place section 6, the second cast-in-place section 7 and the third cast-in-place section 8, firstly carry out measurement and layout, lay out the positions of each prefabricated component in the building prefabricated component system and the position of the 30 cm cast-in-place area, and affix double-sided tape to the joints between the prefabricated components to prevent leakage.

[0075] When hoisting precast floor slabs and precast beam slabs, hoisting is carried out through the floor slab hoisting points 9. When hoisting precast floor slabs 3, four floor slab hoisting points 9 are set, and a rectangular frame hoisting frame is used for hoisting. The hoisting steel rope or chain uses a special chain and 4 closed hooks. The length of a single chain is 3m. The hoisting point position is between 1 / 4 and 1 / 5 of the entire slab length at both ends of the precast slab. The 4 floor slab hoisting points 9 are evenly loaded and hoisted to ensure smooth hoisting of the components.

[0076] As one preferred embodiment, in step A, when constructing the anti-floating foundation, Figure 20-21 As shown, the construction steps include the following: Step A1: drilling an anchor hole 402 according to the length of the anti-floating anchor rod 41; Step A2: A plurality of anchor bars 403 are fixed by using a fixing tube 404, and positioning stirrups 405 are arranged on the plurality of anchor bars 403 to form an anti-floating anchor rod 41. The positioning stirrups 405 can ensure that the anchor bars 403 are located in the middle of the anchor hole 402, thereby avoiding problems such as deviation that affect the anti-floating effect of the anti-floating anchor rod 41; Step A3: lowering the anti-floating anchor rod 41 into the anchor hole 402 and pouring anchor rod mortar; Step A4: construct a foundation cushion layer 406, and construct a waterproof structure at the position where the anti-floating anchor rod 41 passes through the foundation cushion layer 406. The waterproof structure includes an expansion water stop ring 407 sleeved on the outside of the anti-floating anchor rod 41, and a sealing paste layer 408 (polysulfide sealing paste, polyurethane sealing paste, etc.) coated on the expansion water stop ring 407. The expansion water stop ring 407 can swell when exposed to water to achieve the purpose of effective water stopping. At the same time, the sealing paste layer 408 is coated on the outside to form a double water stopping effect. Step A5: constructing the top reinforcement of the anti-floating anchor rod 41, including bending the top of the anchor bar 403 into an L shape, and connecting the foundation transverse reinforcement 410 to the anchor bar 403, and fixing the foundation reinforcement 401 to the foundation transverse reinforcement 410, wherein the foundation reinforcement 401 is used to be inserted into the casting sleeve 5 connected to the prefabricated column 1 when the prefabricated column 1 is installed in the subsequent sequence; Step A6: Casting the base plate 409.

[0077] By arranging anti-floating anchor rods with a length of 6 to 9 meters in the building foundation of the prefabricated building, the purpose of effective anti-floating can be achieved. At the same time, the prefabricated columns and the anti-floating foundation are connected into an integral structure to improve the structural stability and construction quality of the prefabricated building.

[0078] The method for installing and constructing the prefabricated building structure of this embodiment also includes construction monitoring, including monitoring of support brackets and lifting machinery, wherein the support bracket monitoring includes bracket displacement monitoring and bracket settlement monitoring, and the lifting machinery monitoring includes offset monitoring.

[0079] By monitoring the installation process of assembled building structures, the dynamic conditions of brackets and formwork supports can be discovered in a timely manner. When sinking, loosening, deformation and horizontal displacement are found to exceed the allowable values, reinforcement treatment should be carried out in a timely manner.

[0080] Specific monitoring methods for construction monitoring: (1) Monitoring items, monitoring methods, accuracy requirements, and measurement point layout Monitoring Project Monitoring instruments Monitoring accuracy Measurement point layout Bracket displacement Total Station 1.0mm 10m apart, no less than 3 points Bracket settlement Level 1.0mm 10m spacing, 3 points Lifting machinery offset Total Station 1.0mm Test every 1 hour The observation points are painted red on the precast columns, precast beams and steel pipe support frames at the edge as monitoring marks. Monitoring points are set under some precast beams with heavy loads to implement real-time monitoring of the support system during the concrete pouring process. (2) Monitoring warning values ​​and allowable values Monitoring Project Warning value Allowed values Bracket displacement 4mm 5mm Bracket settlement 4mm 5mm Lifting machinery offset 4mm 5mm (3) Monitoring measures Monitoring is carried out during the installation of precast columns and the pouring of cast-in-place sections. The installation of precast columns and the pouring of cast-in-place sections in the above-mentioned locations are poured during the day. During the monitoring, plane displacement deformation monitoring and settlement monitoring are carried out simultaneously. Specifically: During the installation of precast columns and the construction of cast-in-place sections, the support and formwork support conditions are monitored in real time. When the values ​​of sinking, loosening, deformation and horizontal displacement reach the allowable values ​​in the above table, the operation is suspended and reinforcement is carried out; (4) Visually monitor the lifting equipment, lifting ropes and lifting rings for wear and stability, and keep records of the monitoring time. Check every 2 hours.

[0081] The above is only a detailed description of the specific implementation of the present invention, rather than a limitation of the present invention. Various substitutions, modifications and improvements made by those skilled in the relevant art without departing from the principle and scope of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for installing and constructing an assembled building structure, characterized in that: The method comprises constructing an anti-floating foundation, a prefabricated column (1), a prefabricated floor slab (3) and a prefabricated beam slab (2), wherein the prefabricated column (1) is installed on a building foundation (4), and the prefabricated floor slab (3) and the prefabricated beam slab (2) are installed on the prefabricated column (1), and the cast-in-place section is constructed to form an assembled building structure. The method specifically comprises the following construction steps: Step A: constructing a building foundation (4), including an anti-floating foundation, and arranging foundation steel bars (401) on top of the anti-floating foundation; Step B: installing a prefabricated column (1) of the bottom layer on the anti-floating foundation, the prefabricated column (1) comprising a prefabricated column head (101) and a prefabricated column tail (102) installed on the anti-floating foundation, column reinforcement (103) being embedded in the prefabricated column (1), the column reinforcement of the prefabricated column head (101) extending outward from the end, the column reinforcement of the prefabricated column tail (102) being connected to a casting sleeve (5), the casting sleeve (5) being embedded in the prefabricated column tail (102), and the end of the casting sleeve (5) being flush with the end of the prefabricated column tail (102), inserting the foundation reinforcement (401) at the top of the anti-floating foundation into the casting sleeve (5) of the prefabricated column tail (102), and a grouting hole (105) being further provided on the outside of the prefabricated column tail (102), the grouting hole (105) being communicated with the casting sleeve (5); Step C: using a fixing component (109) to fix the prefabricated column (1) on the bottom layer; Step D: Casting the cast-in-place foundation section (10) between the bottom prefabricated columns (1) and the building foundation (4); Step E: Installing the upper structure on the head of the precast column (1) of the bottom layer, including the precast column (1), precast floor slab (3) and precast beam slab (1) of the upper layer, when installing the precast column (1) of the upper layer, inserting the column reinforcement (103) on the head (101) of the precast column of the bottom layer into the casting sleeve (5) connected to the tail (102) of the precast column of the upper layer (1), and extending the length of the column reinforcement (103) from the head (101) of the precast column to be greater than the length of the column reinforcement (103) inserted into the casting sleeve (5) The depth of the cast sleeve (5) is such that the end of the precast column head (101) of the bottom layer and the end of the precast column tail (102) of the precast column (1) of the upper layer form a first cast-in-place section (6), and the precast floor slab (3) and the precast beam slab (2) are installed, and a second cast-in-place section (7) is formed between the precast floor slab (3) and the precast beam slab (2), and the two ends of the precast beam slab (3) are overlapped on the precast column (1) and cast-connected through the first cast-in-place section (6); Step F: pouring concrete in the first cast-in-place section (6) and the casting sleeve (5) through the grouting hole (105), and pouring the second cast-in-place section (7) at the same time; Step G: According to the construction contents of step E and step F, the prefabricated columns (1), prefabricated beams (2) and prefabricated floor slabs (3) of the next layer are repeatedly installed to form a complete prefabricated building structure.

2. The method for installing and constructing a prefabricated building structure according to claim 1, characterized in that: The fixing component (109) in step C comprises a telescopic diagonal brace (1091), a connecting piece (1092) being pre-buried in the middle of the precast column (1) and close to one end of the precast column head (101); one end of the diagonal brace (1091) is hinged to the connecting piece (1092), and the other end is fixed to the building foundation (4) or the second cast-in-place section (7).

3. The method for installing and constructing a prefabricated building structure according to claim 1, characterized in that: In step A, the construction of the anti-floating foundation includes the following construction steps: Step A1: drilling an anchor hole (402) according to the length of the anti-floating anchor rod (41); Step A2: using a fixing tube (404) to fix a plurality of anchor bars (403), and arranging positioning stirrups (405) on the plurality of anchor bars (403) to form an anti-floating anchor rod (41); Step A3: lowering the anti-floating anchor rod (41) into the anchor hole (402) and pouring anchor rod mortar; Step A4: constructing a foundation cushion layer (406), and constructing a waterproof structure at the location where the anti-floating anchor rod (41) passes through the foundation cushion layer (406), including an expansion water stop ring (407) sleeved on the outside of the anti-floating anchor rod (41), and a sealing paste layer (408) coated on the expansion water stop ring (407); Step A5: constructing the top reinforcement of the anti-floating anchor rod (41), including bending the anchor bar (403) into an L shape, embedding it in the bottom plate (409) to be cast, and connecting the foundation transverse reinforcement (410) to the anchor bar (403), and fixing the foundation reinforcement (401) to the foundation transverse reinforcement (410), wherein the foundation reinforcement (401) is inserted into the casting sleeve (5) of the precast column (1) when the precast column (1) is installed in the subsequent sequence; Step A6: Casting the base plate (409).

4. The method for installing and constructing a prefabricated building structure according to claim 1, characterized in that: The cross-sectional shape of the prefabricated column (1) used in the installation construction method is square, the casting sleeve (5) is arranged around the end surface of the prefabricated column tail (102), and a quadrangular pyramid-shaped casting hole (108) is opened in the middle of the end surface of the prefabricated column tail (102). Each casting sleeve (5) is provided with a grouting hole (105), and all the grouting holes (105) are concentrated on two adjacent sides of the outer side of the prefabricated column tail (102). The prefabricated column (1) is also provided with an exhaust hole (107) for connecting the casting hole (108) with the air outside the prefabricated column (1).

5. The method for installing and constructing a prefabricated building structure according to claim 1, characterized in that: Before installing the prefabricated column (1), the prefabricated column (1) is hoisted and supported by a fixing component (109), the fixing component (109) comprising a telescopic diagonal brace (1091), a connecting member (1092) being pre-buried in the middle of the prefabricated column (1) and close to one end of the prefabricated column head (101), the connecting member (1092) comprising a fixing plate (1092a) welded to the internal column reinforcement (103) of the prefabricated column (1), a connecting plate (1092b) being vertically welded to the fixing plate (1092a), one end of the diagonal brace (1091) being hinged to the connecting plate (1092b), and the other end being fixed to the building foundation (4) or the second cast-in-place section (7), the verticality of the prefabricated column (1) being adjusted by the telescopic structure of the diagonal brace (1091).

6. The method for installing and constructing a prefabricated building structure according to claim 1, characterized in that: In the step E, when installing the prefabricated floor slab, a casting sleeve (5) is pre-buried and installed in the prefabricated floor slab (3), and the casting sleeve (5) is used to insert and connect the floor slab reinforcement bars (31) at the ends of adjacent prefabricated floor slabs (3). A floor slab exhaust hole (302) is also provided at the pre-buried portion of the casting sleeve (5) of the prefabricated floor slab (3), and one end of the casting sleeve (5) is flush with the end of the prefabricated floor slab (3), and the other end is connected to the floor slab exhaust hole (302), so that the adjacent two slabs are When the prefabricated floor slabs (3) are spliced, the floor slab reinforcement (31) at one end of the prefabricated floor slab (3) is inserted and installed in the casting sleeve (5) of the adjacent prefabricated floor slab (3), and the length of the floor slab reinforcement (31) extending out of the end of the prefabricated floor slab (3) is greater than the depth of the insertion into the casting sleeve (5), so that a third cast-in-place section (8) of a certain width is formed between the ends of the two adjacent prefabricated floor slabs (3), and the third cast-in-place section (8) is cast, so that the two adjacent prefabricated floor slabs (3) are spliced ​​and fixed.

7. The method for installing and constructing a prefabricated building structure according to claim 6, characterized in that: The floor slab reinforcement (31) comprises floor slab transverse reinforcements (311) arranged along the length direction of the precast floor slab (3), and floor slab longitudinal reinforcements (312) arranged perpendicular to the floor slab transverse reinforcements (311). The floor slab transverse reinforcements (311) comprise first transverse reinforcements (3111) and second transverse reinforcements (3112) arranged side by side. One end of the first transverse reinforcement (3111) extends out of the end of the precast floor slab (3), and the other end is inserted into and connected to a casting sleeve (5). One end of the second transverse reinforcement (3112) is buried in the precast floor slab (3), and the other end extends out of the end of the precast floor slab (3) where the casting sleeve (5) is arranged. When two adjacent precast floor slabs (3) are spliced, the first transverse reinforcement (3111) of the second precast floor slab (3) is inserted into and connected to the casting sleeve (5) of the first precast floor slab (3).

8. The method for installing and constructing a prefabricated building structure according to claim 7, characterized in that: The floor slab reinforcement (31) further comprises a plurality of reinforcing ribs (313) arranged side by side. The prefabricated floor slab (3) comprises a concrete layer (301). Each of the reinforcing ribs (313) comprises a plurality of frame ribs (314) arranged side by side. Two adjacent frame ribs (314) are fixedly connected via a wavy first oblique rib (315). Each frame rib (314) comprises a first transverse rib (3141) and a second transverse rib (3142) arranged in parallel. The first transverse rib (3141) and the second transverse rib (3142) are connected via a wavy second oblique rib (316). All of the first transverse rib (3141) and part of the second oblique rib (316) are embedded in the concrete layer (301), so that each of the reinforcing ribs (313) is partially embedded in the concrete layer.

9. The method for installing and constructing a prefabricated building structure according to any one of claims 1 to 8, characterized in that: In step E, when installing the precast beam slab (2), a casting sleeve (5) and beam slab reinforcement (21) are pre-embedded in the precast beam slab (2), wherein the casting sleeve (5) is pre-embedded near the end of the precast beam slab (2), and the beam slab reinforcement (21) extends out of the end faces and side faces of the precast beam slab (2). The casting sleeve (5) of the precast beam slab (2) is used for inserting and connecting the beam slab reinforcement (21) on the outer side of the end of the adjacent precast beam slab (2). ) The embedded part is also provided with a beam slab exhaust hole (201), one end of the casting sleeve (5) is flush with the end of the precast beam slab (2), and the other end is connected to the beam slab exhaust hole (201). When two adjacent precast beam slabs (2) are spliced, the beam slab steel bars (21) at one end of the precast beam slab (2) are inserted and installed in the casting sleeve (5) of the adjacent precast beam slab (2). After the two sides of the precast beam slab (2) are spliced ​​with the precast floor slab (3), a second cast-in-place section (7) is formed for pouring concrete for connection.

10. The method for installing and constructing a prefabricated building structure according to any one of claims 1 to 8, characterized in that: The method for installing and constructing a prefabricated building structure also includes construction monitoring, including monitoring of support brackets and lifting machinery, wherein the support bracket monitoring includes bracket displacement monitoring and bracket settlement monitoring, and the lifting machinery monitoring includes offset monitoring.

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