Beam-penetrating sleeve pre-embedding device and construction method

Abstract

The beam-penetrating sleeve pre-embedding device comprises prefabricated crossed reinforcing ribs, pre-embedded sleeve fixers and a sleeve body, the two sets of prefabricated crossed reinforcing ribs are symmetrically arranged on building steel bars front and back, penetrating openings are formed in the middles of the prefabricated crossed reinforcing ribs, and the pre-embedded sleeve fixers are inserted into the two sets of penetrating openings in a penetrating mode. And the sleeve body is inserted into and penetrates through the embedded sleeve fixer. The casing pipe has the beneficial effects that through cooperation of the prefabricated crossed reinforcing ribs, the pre-embedded casing pipe fixator and the casing pipe body, accurate pre-embedded fixing of the casing pipe is achieved; the cross-shaped prefabricated crossed reinforcing ribs are bundled and fixed to building steel bars, and a middle penetrating opening is precisely matched with the pre-embedded sleeve fixer; a first cavity, a second cavity and a butt joint pipe of the pre-embedded sleeve fixer are designed in a split mode, a first telescopic pipe and a second telescopic pipe are matched with building beams with different thicknesses, and the sealing performance is enhanced through a rubber sealing ring. The outer ring plays a limiting role, the threaded opening is matched with the fixing bolt to be connected with the building formwork, and the sleeve is effectively prevented from shifting during concrete pouring.

Description

Technical Field

[0001] This invention relates to the field of building engineering technology, and in particular to a pre-embedded device and construction method for a through-beam sleeve. Background Technology

[0002] Pipes passing through beams, also known as pipe sleeves passing through beams, are steel pipes or sleeves pre-embedded when pouring concrete beams. They are specially designed to provide channels for pipelines (such as electrical wires, water pipes, and air ducts) to pass through. Their core function is to avoid the need for secondary drilling in the beams later. This not only protects the pipelines but also ensures that the beam structure is not damaged. It can also save floor space and is widely used in the field of building construction.

[0003] For example, a Chinese patent discloses a pre-embedded fixing structure for a through-beam sleeve (application number: CN202323287440.3), including auxiliary fixing components at both ends of the through-beam sleeve. One end of the auxiliary fixing component is located above the through-beam sleeve and fixedly connected to it, while the other end is fixed to the bottom formwork of the floor slab on both sides of the through-beam sleeve, wherein the floor slabs on both sides of the through-beam sleeve have equal elevations. It also includes auxiliary fixing components at both ends of the through-beam sleeve. One auxiliary fixing component has one end located above the through-beam sleeve and fixedly connected to it, while the other end is fixed to the bottom formwork of the floor slab on one side of the through-beam sleeve. The bottom of the other auxiliary fixing component has a flat iron welded to it, with the bottom of the flat iron located above the through-beam sleeve and fixedly connected to it, wherein the floor slabs on both sides of the through-beam sleeve have unequal elevations.

[0004] However, existing through-beam pipes have the following problems during the pre-embedding construction: the through-beam sleeve is reserved and pre-embedded during the reinforcement binding process, but in actual operation, the sleeve is prone to displacement during concrete pouring, which makes the reserved and pre-embedded position of the through-beam pipe inaccurate. In addition, existing through-beam sleeves need to be fixed by setting diagonal cross reinforcing bars during the installation process, but due to the limited space inside the beam, the operation is difficult and there is a lack of a quick and effective pre-embedding and fixing device for through-beam pipes.

[0005] Therefore, it is necessary to propose a pre-embedded device and construction method for through-beam sleeves to address the above issues. Summary of the Invention

[0006] In view of the shortcomings of the prior art, the purpose of this invention is to provide a pre-embedded device and construction method for through-beam sleeves to solve the above problems.

[0007] A pre-embedded sleeve device for beam penetration includes prefabricated cross reinforcing bars, pre-embedded sleeve fixers, and sleeve bodies. Two sets of the prefabricated cross reinforcing bars are symmetrically arranged on the building reinforcement bars. The prefabricated cross reinforcing bars have through holes in the middle. The pre-embedded sleeve fixers are inserted into the two sets of through holes. The sleeve body is inserted into and passes through the pre-embedded sleeve fixers.

[0008] Preferably, the prefabricated cross reinforcing bar is formed by bending a whole steel bar, and the prefabricated cross reinforcing bar is a cross shape formed by two rectangles perpendicularly intersecting.

[0009] Preferably, the pre-embedded sleeve fixer includes a first cavity, a second cavity, and a connecting pipe. The connecting pipe is integrally formed with one end of the first cavity. The inner diameters of the first cavity and the second cavity are the same. The outer diameter of the second cavity is the same as the inner diameter of the connecting pipe. One end of the second cavity is inserted into the connecting pipe.

[0010] Preferably, a sealing ring is provided between the second cavity and the connecting pipe, and the sealing ring is made of rubber.

[0011] Preferably, the connecting pipe is provided with a first telescopic pipe, and the second cavity is provided with a second telescopic pipe, and the first telescopic pipe and the second telescopic pipe are connected in cooperation.

[0012] Preferably, the other end of the first cavity and the second cavity is provided with an outer ring, and the outer ring is provided with several threaded openings evenly distributed.

[0013] Preferably, the outer diameter of the pre-embedded sleeve fixer is the same as the inner diameter of the prefabricated cross reinforcing bar. The prefabricated cross reinforcing bar is fixed to the building steel reinforcement by binding. The pre-embedded sleeve fixer is inserted into the through-hole of the prefabricated cross reinforcing bar. The outer diameter of the outer ring is larger than the inner diameter of the prefabricated cross reinforcing bar. The pre-embedded sleeve fixer is connected to the building formwork through the threaded port and fixing bolt on the outer ring.

[0014] A construction method for a pre-embedded device for a through-beam sleeve, comprising the following steps: S1. Measurement of pipe dimensions through beams and selection of pre-embedded sleeve fixing device: First, the staff uses measuring tools to measure the outer diameter of the pipe to be installed through beams. Then, the staff selects a pre-embedded sleeve fixing device with an inner diameter larger than the outer diameter of the pipe through beams for later use. S2. Fabrication of prefabricated cross reinforcing bars: Workers use specialized steel bar bending equipment to continuously bend and shape the entire steel bar into a cross shape, so that a through-hole is formed in the middle of the fully formed reinforcing bar, and the diameter of the through-hole is equal to the outer diameter of the pre-embedded sleeve fixer. S3. Construction and installation of precast cross reinforcing bars and embedded sleeve fixers: The workers place two sets of precast cross reinforcing bars on the building steel bars and align them. At this time, the precast cross reinforcing bars are tied and fixed by binding steel wire. After the fixing is completed, the embedded sleeve fixers are passed through the openings of the two sets of precast cross reinforcing bars. At the same time, the embedded sleeve fixers are fixed to the designated position of the building formwork through the threaded opening and fixing bolt on the outer ring to prevent displacement. S4. Installation of pipes through beams: After the concrete is poured and cured, the workers will pass the pipe body through the inside of the pre-embedded pipe fixing device and make the end face the designated position to complete the installation.

[0015] Compared with existing technologies, the present invention has the following advantages: This device achieves precise pre-embedded fixing of the sleeve through the coordinated cooperation of prefabricated cross reinforcing ribs, pre-embedded sleeve fixers, and the sleeve body; the cross-shaped prefabricated cross reinforcing ribs are tied and fixed to the building steel bars, and the central through-hole is precisely adapted to the pre-embedded sleeve fixer and clamps it in place; the first cavity, the second cavity, and the connecting pipe of the pre-embedded sleeve fixer are designed separately, and the first telescopic pipe and the second telescopic pipe are matched to building beams of different thicknesses, and the rubber sealing ring enhances the sealing performance; the outer ring plays a limiting role, and the threaded end is connected to the building formwork with the fixing bolt, effectively preventing the sleeve from shifting during concrete pouring, ensuring smooth pipe installation later, simplifying the construction process, and improving construction efficiency. Attached Figure Description

[0016] Figure 1 This is a structural diagram of the present invention; Figure 2 This is a structural diagram of the prefabricated cross-reinforcing ribs of the present invention; Figure 3 This is a structural diagram of the pre-embedded sleeve fixer of the present invention; Figure 4 and Figure 5 This is a structural diagram of the first cavity of the present invention; Figure 6 and Figure 7 This is a structural diagram of the second cavity of the present invention; Figure 8 This is a schematic diagram illustrating the use of the present invention; Figure 9 This is a flowchart of the construction method of the present invention.

[0017] The attached diagram is labeled as follows: 1. Precast cross reinforcing bar; 11. Through-hole; 12. Binding wire; 2. Embedded sleeve fixer; 21. First cavity; 22. Second cavity; 221. Second telescopic tube; 23. Butt joint; 231. First telescopic tube; 24. Sealing ring; 25. Outer ring; 26. Threaded opening; 27. Fixing bolt; 3. Sleeve body; 4. Building reinforcement; 5. Building formwork. Detailed Implementation

[0018] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0019] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0020] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0021] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways as defined and covered by the claims.

[0022] like Figure 1 and combined Figures 2 to 9 As shown, a pre-embedded sleeve device for beams includes prefabricated cross reinforcing bars 1, pre-embedded sleeve fixers 2, and sleeve bodies 3. Two sets of prefabricated cross reinforcing bars 1 are symmetrically arranged on the building steel bars 4. The prefabricated cross reinforcing bars 1 have through holes 11 in the middle. The pre-embedded sleeve fixers 2 are inserted into the two sets of through holes 11. The sleeve bodies 3 are inserted into and pass through the pre-embedded sleeve fixers 2.

[0023] Furthermore, the prefabricated cross reinforcing bar 1 is formed by bending a whole steel bar, and the prefabricated cross reinforcing bar 1 is a cross shape formed by two rectangles perpendicularly intersecting.

[0024] The benefits of adopting a further technical solution are as follows: the prefabricated cross reinforcing bar 1 is formed by bending a whole steel bar without splicing, which not only ensures its own structural strength and integrity and avoids breakage at the splice, but also simplifies the processing technology and reduces the processing cost. At the same time, its design as a cross shape with two rectangles perpendicularly intersecting can distribute the force more evenly than other shapes, enhance the connection stability with the building steel bar 4, and the through hole 11 in the middle of the cross shape can more accurately fit the pre-embedded sleeve fixer 2, further improving the positioning accuracy of the sleeve pre-embedding.

[0025] Furthermore, the pre-embedded sleeve fixer 2 includes a first cavity 21, a second cavity 22, and a connecting pipe 23. The connecting pipe 23 is integrally formed with one end of the first cavity 21. The inner diameters of the first cavity 21 and the second cavity 22 are the same. The outer diameter of the second cavity 22 is the same as the inner diameter of the connecting pipe 23. One end of the second cavity 22 is inserted into the connecting pipe 23.

[0026] The benefits of adopting a further technical solution are as follows: The pre-embedded sleeve fixer 2 adopts a split structure of a first cavity 21, a second cavity 22, and a connecting pipe 23. The assembly length can be flexibly adjusted according to the thickness of the building beam, adapting to construction scenarios of different sizes and improving the versatility of the lifting device. The connecting pipe 23 is integrally formed with the first cavity 21, ensuring the sealing and structural strength of the connection between the two, and preventing cement slurry from seeping into the interior and contaminating the sleeve body 3 during concrete pouring. At the same time, the inner diameters of the first cavity 21 and the second cavity 22 are the same, ensuring that the sleeve body 3 is subjected to uniform force and without jamming when it is penetrated. The outer diameter of the second cavity 22 is the same as the inner diameter of the connecting pipe 23, achieving a tight fit between the two, improving the overall assembly stability of the pre-embedded sleeve fixer 2, and preventing loosening during use.

[0027] Furthermore, a sealing ring 24 is provided between the second cavity 22 and the connecting pipe 23, and the sealing ring 24 is made of rubber material.

[0028] The following are the benefits of adopting a further technical solution: A sealing ring 24 made of rubber is set between the second cavity 22 and the connecting pipe 23. Rubber has good elasticity and sealing properties, and can be adapted to the assembly gap between the two. This can further enhance the sealing of the connection between the second cavity 22 and the connecting pipe 23, completely prevent cement slurry, water and other impurities from entering the interior of the pre-embedded sleeve fixer 2 during the concrete pouring process, avoid the sleeve body 3 from being contaminated and corroded, extend the service life of the sleeve, and at the same time have a certain buffering effect, reduce the impact of vibration on the assembly structure of the pre-embedded sleeve fixer 2 during construction, and improve the fixing stability.

[0029] Furthermore, the connecting pipe 23 is provided with a first telescopic pipe 231, and the second cavity is provided with a second telescopic pipe 221, with the first telescopic pipe 231 and the second telescopic pipe 221 being connected in cooperation.

[0030] The benefits of adopting a further technical solution are as follows: the first telescopic pipe 231 of the connecting pipe 23 and the second telescopic pipe 221 of the second cavity 22 are connected in cooperation, so that the overall length of the pre-embedded sleeve fixer 2 can be flexibly adjusted. Compared with the traditional fixed length structure, it can better adapt to building beams of different thicknesses, further improve the versatility and construction flexibility of the device, and at the same time, the length of the pre-embedded sleeve fixer 2 can be precisely adjusted during the assembly process to ensure that the pre-embedded depth of the sleeve body 3 meets the construction requirements and improve the pre-embedded accuracy.

[0031] Furthermore, the other end of the first cavity 21 and the second cavity 22 is provided with an outer ring 25, and the outer ring 25 is provided with several threaded openings 26 evenly.

[0032] The advantages of adopting a further technical solution are as follows: The outer ring 25 set at the other end of the first cavity 21 and the second cavity 22 can limit the pre-embedded sleeve fixation device 2, preventing it from being over-inserted into the through hole 11 of the prefabricated cross reinforcing rib 1, and ensuring accurate assembly position. At the same time, the several threaded holes 26 evenly opened on the outer ring 25 provide installation points for the connection between the pre-embedded sleeve fixation device 2 and the building formwork 5. The two can be detachably connected by fasteners, which not only ensures the fixed stability of the sleeve body 3 during the pre-embedding process, but also facilitates the removal of the building formwork 5 after construction without damaging the pre-embedded device.

[0033] Furthermore, the outer diameter of the pre-embedded sleeve fixer 2 is the same as the inner diameter of the prefabricated cross reinforcing bar 1. The prefabricated cross reinforcing bar 1 is fixed to the building steel bar 4 by binding. The pre-embedded sleeve fixer 2 is inserted into the through hole 11 of the prefabricated cross reinforcing bar 1. The outer diameter of the outer ring 25 is larger than the inner diameter of the prefabricated cross reinforcing bar 1. The pre-embedded sleeve fixer 2 is connected to the building formwork 5 through the threaded port 26 and fixing bolt 27 on the outer ring 25.

[0034] The following benefits are derived from the adoption of a further technical solution: The outer diameter of the pre-embedded sleeve fixer 2 is the same as the inner diameter of the precast cross reinforcing bar 1, achieving a tight fit between the two and preventing the pre-embedded sleeve fixer 2 from shaking within the through-hole 11. The precast cross reinforcing bar 1 is fixed to the building steel bar 4 by binding, which is simple and convenient to operate, requires no complex connecting parts, reduces construction difficulty, and is compatible with the layout characteristics of the building steel bar 4. At the same time, the outer diameter of the outer ring 25 is larger than the inner diameter of the precast cross reinforcing bar 1, which can play an axial limiting role for the pre-embedded sleeve fixer 2, preventing it from axially shifting during concrete pouring. Then, it is connected to the building formwork 5 through the threaded port 26 and fixing bolt 27 on the outer ring 25, realizing the synchronous fixing of the pre-embedded device and the building formwork 5, further limiting displacement, ensuring that the sleeve body 3 maintains a precise position during concrete pouring, and improving construction quality and pre-embedded stability.

[0035] A construction method for a pre-embedded device for a through-beam sleeve, comprising the following steps: S1. Measurement of pipe dimensions through beams and selection of pre-embedded sleeve fixing device 2: First, the staff uses measuring tools to measure the outer diameter of the pipe to be installed through beams. Then, the staff selects a pre-embedded sleeve fixing device 2 with an inner diameter larger than the outer diameter of the pipe through beams for backup. S2. Fabrication of prefabricated cross reinforcing bars 1: The staff uses a special steel bar bending equipment to continuously bend the entire steel bar into shape and distribute it in a cross shape, so that the center of the fully formed reinforcing bar forms a through-hole 11, the diameter of the through-hole 11 is equal to the outer diameter of the pre-embedded sleeve fixer 2. S3. Construction and installation of prefabricated cross reinforcing bars 1 and embedded sleeve fixers 2: The workers place two sets of prefabricated cross reinforcing bars 1 on the building steel bars 4 and align them. At this time, the prefabricated cross reinforcing bars 1 are tied and fixed by binding steel wire. After the fixing is completed, the embedded sleeve fixers 2 are passed through the through holes 11 of the two sets of prefabricated cross reinforcing bars 1. At the same time, the embedded sleeve fixers 2 are fixed to the designated position of the building formwork 5 through the threaded hole 26 and fixing bolt 27 on the outer ring 25 to prevent displacement. S4. Installation of pipes through beams: After the concrete is poured and cured, the workers will pass the sleeve body 3 through the inside of the pre-embedded sleeve fixer 2 and make the end face the designated position to complete the installation.

[0036] Compared with the prior art, the present invention has the following advantages: This device achieves precise pre-embedded fixing of the sleeve through the coordinated cooperation of prefabricated cross reinforcing ribs 1, pre-embedded sleeve fixers 2 and sleeve body 3; the cross-shaped prefabricated cross reinforcing ribs 1 are tied and fixed to the building steel bars 4, and the central through-hole 11 is precisely adapted to the pre-embedded sleeve fixer 2 and clamps and fixes it; the first cavity 21, the second cavity 22 and the connecting pipe 23 of the pre-embedded sleeve fixer 2 are designed separately, the first telescopic pipe 231 and the second telescopic pipe 221 are matched with building beams of different thicknesses, and the rubber sealing ring 24 enhances the sealing performance; the outer ring 25 plays a limiting role, and the threaded port 26 is connected to the building formwork 5 with the fixing bolt 27, which effectively prevents the sleeve from shifting during concrete pouring, ensures smooth pipe installation in the later stage, simplifies the construction process and improves construction efficiency.

[0037] Working principle: Step 1: Measurement of pipe dimensions through beams and selection of pre-embedded sleeve fixing device 2: First, the staff uses measuring tools to measure the outer diameter of the pipe to be installed through beams. Then, the staff selects a pre-embedded sleeve fixing device 2 with an inner diameter larger than the outer diameter of the pipe through beams for later use. Step 2, Fabrication of prefabricated cross reinforcing bars 1: The staff uses a special steel bar bending equipment to continuously bend the entire steel bar into shape and distribute it in a cross shape, so that the center of the fully formed reinforcing bar forms a through-hole 11, the diameter of which is equal to the outer diameter of the pre-embedded sleeve fixing device 2. Step 3: Construction and installation of prefabricated cross reinforcing bars 1 and pre-embedded sleeve fixers 2: The workers place the two sets of prefabricated cross reinforcing bars 1 on the building steel bars 4 and align them. At this time, the prefabricated cross reinforcing bars 1 are tied and fixed by binding steel wire. After the fixing is completed, the pre-embedded sleeve fixers 2 are passed through the through holes 11 of the two sets of prefabricated cross reinforcing bars 1. At the same time, the pre-embedded sleeve fixers 2 are fixed to the designated position of the building formwork 5 through the threaded hole 26 and fixing bolt 27 on the outer ring 25 to prevent displacement. Step 4: Installation of pipes through beams: After the concrete is poured and cured, the workers will pass the sleeve body 3 through the inside of the pre-embedded sleeve fixer 2 and make the end face the designated position to complete the installation.

[0038] Example 1: Construction of Through-beam Sleeves for Ordinary Thickness Reinforced Concrete Beams in Residential Buildings This embodiment is applied to the pre-embedded construction of water pipe sleeves through reinforced concrete beams in high-rise residential buildings. The building beam is designed to be 300mm thick, and the outer diameter of the water pipe sleeve to be pre-embedded is 80mm. The construction area is the reserved position of the through-beam pipe in the kitchen and bathroom of the standard floor of the residential building. The building reinforcement is made of HRB400 grade Φ12 main bars and Φ8 stirrups tied together.

[0039] The surveyor used a vernier caliper to measure the outer diameter of the water pipe sleeve to be installed. After confirming that it was 80mm, a pre-embedded sleeve fixer with an inner diameter of 90mm was selected for use. The foundation length of the first and second cavities of the fixer is adapted to a 300mm building beam, so there is no need for additional stretching of the expansion tube. Using HRB400 grade Φ10 steel bars, the entire steel bar is continuously bent using a steel bar bending machine to create two rectangular, vertically intersecting, cross-shaped prefabricated cross reinforcing bars. The diameter of the central opening is consistent with the outer diameter of the pre-embedded sleeve fixer, which is 100mm. Two sets of prefabricated cross reinforcing bars of the same specifications are made.

[0040] Installation of prefabricated cross reinforcing bars: Place two sets of prefabricated cross reinforcing bars symmetrically at the reserved pipe positions of the building reinforcement beams, ensuring that the centers of the two sets of reinforcing bars are aligned. Use No. 22 binding steel wire to tightly tie and fix the prefabricated cross reinforcing bars to the building stirrups, ensuring that the reinforcing bars are not loose or displaced. Assembly and fixing of the embedded sleeve fixing device: Place the rubber sealing ring on the mating part of the second cavity and the connecting pipe, insert one end of the second cavity into the connecting pipe to complete the assembly of the embedded sleeve fixing device. Then, pass the assembled fixing device through the through holes of the two sets of prefabricated cross reinforcing ribs. Use the outer rings at both ends of the fixing device to achieve axial limit. The outer diameter of the outer ring is larger than the inner diameter of the through hole to prevent the fixing device from being over-inserted. Then, through the four evenly spaced threaded holes on the outer ring, use M8 fixing bolts to fasten the embedded sleeve fixing device to the building wooden formwork. After checking that the fixing device is perpendicular to the formwork and has no deviation, the fixing is completed. Concrete pouring and curing: C30 concrete was poured into the beam in accordance with the specifications for concrete construction of residential buildings. During the pouring process, the vibrator was prevented from directly hitting the pre-embedded sleeve fixing device. After the pouring was completed, the beam was cured for 7 days as required. Installation of the sleeve body: After the concrete has been cured to the required standard, the building formwork is removed, and the steel sleeve body with an outer diameter of 80mm is inserted and passed through the pre-embedded sleeve fixer. The end of the sleeve body is adjusted so that it is aligned with the designated position of the water pipe in the kitchen and bathroom, and the pre-embedded sleeve construction is completed.

[0041] The prefabricated cross reinforcing bars are firmly integrated with the building steel bars. The pre-embedded sleeve fixation device is double-fixed (reinforcing bar clamping + formwork bolt fixing), so there is no deviation or tilting during the concrete pouring process. The sleeve body is installed smoothly without jamming. The deviation between the pre-embedded position and the design position is ≤2mm, which meets the accuracy requirements for the construction of through-beam pipes in residential buildings. In addition, the rubber sealing ring effectively prevents cement slurry from seeping in, and there are no impurities left inside the fixation device, so no subsequent cleaning is required.

[0042] Example 2: Construction of Through-beam Sleeves for Thickened Reinforced Concrete Beams in Commercial Buildings This embodiment is applied to the pre-embedding construction of thickened reinforced concrete beam cable conduits in the underground garage of a large commercial complex. The design thickness of the building beam is 600mm, and the outer diameter of the cable conduit to be pre-embedded is 150mm. The construction area is the reserved position for the cable through beam in the power well of the underground garage. The building reinforcement uses HRB400 grade Φ16 main bars and Φ10 stirrups tied together.

[0043] The surveyor used a laser diameter gauge to measure the outer diameter of the cable conduit to be installed. After determining that it was 150mm, a pre-embedded conduit fixing device with an inner diameter of 160mm was selected for use. This fixing device is equipped with a telescopic first telescopic tube (at the connecting tube) and a second telescopic tube (at the second cavity). The telescopic adjustment range is 300mm-700mm, which is suitable for 600mm thickened building beams. HRB400 grade Φ14 steel bars are used, and cross-shaped prefabricated cross reinforcing bars are made using fully automatic steel bar bending equipment. The diameter of the central through-hole matches the outer diameter of the pre-embedded sleeve fixer at 170mm to ensure that the fixer can be tightly locked. Two sets of prefabricated cross reinforcing bars of the same specification are made.

[0044] Installation of prefabricated cross reinforcing bars: Place two sets of prefabricated cross reinforcing bars symmetrically in front and behind the reserved pipe positions of the thickened beam of the building reinforcement, align the center axis of the opening with the design pipe axis, and use No. 24 binding steel wire to tie and fix the reinforcing bars to the main reinforcement and stirrups of the building in multiple layers to enhance the connection stability and adapt to the construction load of the thickened beam. Pre-embedded sleeve fixer telescopic assembly and fixing: Place the rubber sealing ring on the fit gap between the second cavity and the connecting pipe. According to the 600mm thickness of the building beam, stretch the first telescopic pipe on the connecting pipe and the second telescopic pipe on the second cavity to adjust the overall length of the pre-embedded sleeve fixer to 600mm. After assembly, pass it through the openings of the two sets of prefabricated cross reinforcing ribs and use the outer rings at both ends to achieve the limit. Through the 6 evenly opened threaded holes on the outer ring, use M10 fixing bolts to fasten the fixer to the building steel formwork. Use a level to correct the verticality of the fixer. After the deviation is adjusted to ≤1°, reinforce the fixing bolts again. Concrete pouring and curing: C40 micro-expansion concrete was poured for the beam. During the pouring process, layered vibration was used to prevent the fixing device from shifting due to vibration force. After the pouring was completed, it was cured for 14 days in accordance with the construction standards for commercial buildings. Installation of the cable sleeve body: After the concrete strength reaches 100% of the design value, the building steel formwork is removed, and the 150mm outer diameter PVC cable sleeve body is inserted into the pre-embedded sleeve fixer. The end of the sleeve is adjusted to make it accurately connect with the reserved position of the power well cable tray, and the pre-embedded cable sleeve construction is completed.

[0045] The telescopic structure of the pre-embedded sleeve fixer perfectly adapts to 600mm thick building beams, requiring no additional processing of fitting parts and improving construction efficiency; the cross-shaped prefabricated cross reinforcing bars effectively disperse the stress in the beam, avoiding steel bar deformation caused by local fixation in thickened beams; the bolt fixing of the fixer to the steel formwork combined with the reinforcing bar clamping completely eliminates displacement problems during concrete pouring, with a pre-embedded position deviation of ≤1mm, meeting the high precision requirements of electrical engineering in commercial complexes; the rubber sealing ring achieves complete sealing at the fixing joint, preventing cement slurry seepage; after the sleeve body is installed, cables can be directly laid without subsequent correction.

[0046] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A pre-embedded device for through-beam sleeves, characterized in that: It includes prefabricated cross reinforcing bars (1), pre-embedded sleeve fixers (2) and sleeve bodies (3). Two sets of prefabricated cross reinforcing bars (1) are symmetrically arranged on the building steel bars (4). There is a through hole (11) in the middle of the prefabricated cross reinforcing bars (1). The pre-embedded sleeve fixers (2) are inserted into the two sets of through holes (11). The sleeve body (3) is inserted into and passes through the pre-embedded sleeve fixers (2).

2. The through-beam sleeve pre-embedded device as described in claim 1, characterized in that: The prefabricated cross reinforcing bar (1) is formed by bending a whole steel bar, and the prefabricated cross reinforcing bar (1) is a cross shape formed by two rectangles perpendicularly intersecting.

3. The pre-embedded device for through-beam sleeves as described in claim 1, characterized in that: The pre-embedded sleeve fixer (2) includes a first cavity (21), a second cavity (22), and a connecting pipe (23). The connecting pipe (23) is integrally formed with one end of the first cavity (21). The inner diameters of the first cavity (21) and the second cavity (22) are the same. The outer diameter of the second cavity (22) is the same as the inner diameter of the connecting pipe (23). One end of the second cavity (22) is inserted into the connecting pipe (23).

4. The through-beam sleeve pre-embedded device as described in claim 3, characterized in that: A sealing ring (24) is provided between the second cavity (22) and the connecting pipe (23), and the sealing ring (24) is made of rubber.

5. The pre-embedded device for through-beam sleeves as described in claim 3, characterized in that: The connecting pipe (23) is provided with a first telescopic pipe (231), and the second cavity is provided with a second telescopic pipe (221). The first telescopic pipe (231) and the second telescopic pipe (221) are connected in cooperation.

6. The pre-embedded device for through-beam sleeves as described in claim 3, characterized in that: The other end of the first cavity (21) and the second cavity (22) is provided with an outer ring (25), and several threaded openings (26) are evenly provided on the outer ring (25).

7. The through-beam sleeve pre-embedded device as described in claim 6, characterized in that: The outer diameter of the pre-embedded sleeve fixer (2) is the same as the inner diameter of the prefabricated cross reinforcing bar (1). The prefabricated cross reinforcing bar (1) is fixed to the building steel bar (4) by binding. The pre-embedded sleeve fixer (2) is inserted into the through hole (11) of the prefabricated cross reinforcing bar (1). The outer diameter of the outer ring (25) is larger than the inner diameter of the prefabricated cross reinforcing bar (1). The pre-embedded sleeve fixer (2) is connected to the building formwork (5) through the threaded hole (26) and fixing bolt (27) on the outer ring (25).

8. A construction method for a beam-through sleeve pre-embedded device as described in any one of claims 1-7, characterized in that: The construction steps are as follows: S1. Measurement of pipe dimensions and selection of embedded sleeve fixing device (2): First, the staff will measure the outer diameter of the pipe to be installed by measuring tools. Then, the staff will select an embedded sleeve fixing device (2) with an inner diameter larger than the outer diameter of the pipe. S2. Fabrication of prefabricated cross reinforcing bars (1): The staff uses a special steel bar bending equipment to continuously bend the entire steel bar into shape and distribute it in a cross shape, so that the center of the fully formed reinforcing bar forms a through hole (11), and the diameter of the through hole (11) is equal to the outer diameter of the pre-embedded sleeve fixing device (2). S3. Construction and installation of prefabricated cross reinforcing bars (1) and embedded sleeve fixers (2): The workers place two sets of prefabricated cross reinforcing bars (1) on the building steel bars (4) and align them front to back. At this time, the prefabricated cross reinforcing bars (1) are tied and fixed by binding steel wire. After the fixing is completed, the embedded sleeve fixers (2) are passed through the through holes (11) of the two sets of prefabricated cross reinforcing bars (1). At the same time, the embedded sleeve fixers (2) are fixed to the designated position of the building formwork (5) through the threaded hole (26) and fixing bolt (27) on the outer ring (25) to prevent deviation. S4. Installation of pipes through beams: After the concrete is poured and cured, the workers will pass the sleeve body (3) through the inside of the pre-embedded sleeve fixer (2) and make the end face the designated position to complete the installation.

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