A pre-fabricated modular basement construction apparatus and method of construction

Abstract

The application relates to the technical field of basement construction, and particularly discloses a prefabricated modular basement construction device and a construction method, which comprises a surrounding structure, a plurality of groups of support column assemblies installed in the surrounding structure and a floor assembly installed on the support column assemblies; the surrounding structure comprises an outer peripheral assembly and prefabricated inner wall plates installed on the outer peripheral assembly and matched with the outer peripheral assembly to form a cavity; the support column assemblies are installed in the cavity; the outer peripheral assembly comprises a plurality of groups of vertical corner column bodies, a plurality of groups of vertical connecting columns arranged between two adjacent groups of the corner column bodies and prefabricated fence wall plates arranged between adjacent connecting columns and / or corner column bodies; the prefabricated fence wall plates are provided with pouring cavities on one side close to the prefabricated inner wall plates for pouring concrete to form cast-in-situ wall plates. The application has superior effects in improving construction efficiency, enhancing structural stability, optimizing waterproof performance, improving construction quality, improving resource utilization efficiency and enhancing design adaptability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of basement construction, more particularly to a prefabricated modular basement construction device and method. BACKGROUND

[0002] In modern construction engineering, the basement as an important part of the building undertakes important functions such as storage, parking and mechanical equipment setting, etc. With the expansion of the scale and the increase of the depth of the building, higher requirements are put forward for the construction technology of the basement. The traditional basement construction method mostly uses cast-in-place concrete structure, which has problems such as long construction period, high labor intensity and uncertain construction period in the construction process. In addition, the existing construction method is difficult to guarantee the waterproof performance, especially in the areas rich in groundwater, the basement seepage and leakage problem is more prominent.

[0003] In order to improve the construction efficiency and quality, prefabricated modular construction technology is gradually introduced into the field of basement construction; prefabricated modular construction technology can effectively shorten the construction period, reduce the complexity of on-site construction, and improve the precision and quality of construction. At the same time, prefabricated modular construction technology can also improve the waterproof performance of the basement, reduce the risk of groundwater infiltration by reasonable design and configuration of waterproof measures, and improve the overall durability of the basement.

[0004] However, prefabricated basement construction methods in the prior art have been proposed, but these methods often have problems such as high technical difficulty, long construction period and high cost. SUMMARY

[0005] The technical problem to be solved by the present application is to provide a prefabricated modular basement construction device and method.

[0006] The solution adopted by the present application to solve the technical problem is:

[0007] A prefabricated modular basement construction device, comprising a surrounding structure, a plurality of groups of support column assemblies installed in the surrounding structure, and a floor assembly installed on the support column assembly;

[0008] The surrounding structure comprises an outer peripheral assembly, a prefabricated inner wall panel installed on the outer peripheral assembly and cooperating with the outer peripheral assembly to form a cavity; the support column assembly is installed in the cavity;

[0009] The outer peripheral assembly comprises a plurality of groups of vertically arranged corner column bodies, a plurality of groups of vertically arranged connecting columns arranged between adjacent two groups of corner column bodies, and a prefabricated guard wall panel arranged between adjacent connecting columns and / or corner column bodies;

[0010] The prefabricated fender plate is provided with a pouring cavity for pouring concrete to form a cast-in-place wall plate on one side close to the prefabricated inner wall plate.

[0011] In some possible embodiments, the prefabricated fender plate is provided with a first grouting groove on one side close to the connecting column or corner column body; the prefabricated fender plate is provided with a first grouting hole in communication with the first grouting groove and a second grouting hole in communication with the pouring cavity on the top of the prefabricated fender plate.

[0012] In some possible embodiments, a plurality of groups of convex prism arranged vertically and separating the pouring cavity into small cavities are arranged in the pouring cavity; the convex prism is provided with a second grouting hole in communication with two adjacent small cavities; a steel mesh is arranged in the pouring cavity.

[0013] In some possible embodiments, the connecting column or corner column body is provided with a slot close to the prefabricated fender plate, and the prefabricated fender plate is inserted into the slot.

[0014] In some possible embodiments, the support column assembly comprises a steel column arranged vertically, a cast-in-place column with a ring-shaped cross section sleeved on the outside of the steel column, and the floor assembly is installed on the cast-in-place column.

[0015] In some possible embodiments, the floor assembly comprises a plurality of groups of prefabricated main beams embedded at the ends and installed in the cast-in-place column or cast-in-place wall plate to form a support frame, a secondary beam assembly connected with the prefabricated main beams and located in the support frame, a cast-in-place floor arranged on the secondary beam assembly, a prefabricated prestressed floor installed on the cast-in-place floor, and a waterproof layer arranged on the prefabricated prestressed floor.

[0016] A construction method of a prefabricated modular basement construction device described above, based on a reverse construction method, specifically comprising the following steps:

[0017] Step S1: construction of the enclosure structure;

[0018] Step S2: construction of the steel column in the support column assembly in the enclosure structure;

[0019] Step S3: excavation of the first underground layer, and construction of the floor assembly of the first underground layer on the support column assembly;

[0020] Step S4: sequentially performing the construction of the multiple underground layers by repeating the step S2 and the step S3;

[0021] Step S5: construction of the basement floor;

[0022] Step S6: waterproof construction of the basement floor and each floor assembly to form a waterproof layer.

[0023] In some possible embodiments, the step S1 specifically comprises the following steps:

[0024] Step S11: guide wall construction, and form a trench;

[0025] Step S12: in the trench, the corner column and the connecting column are constructed by using the static pressure mode, so that the corner column and the connecting column are inserted into the trench;

[0026] Step S13: the prefabricated guard wall plate is hoisted and inserted into the adjacent corner column and / or connecting column to form an integral whole.

[0027] In some possible implementation manners, the step S3 specifically comprises the following steps:

[0028] Step S31: the excavation of the corresponding earthwork of the underground first floor is carried out in the enclosure, and the cast-in-place column is constructed;

[0029] Step S32: the installation of the prefabricated main beam and the installation of the prefabricated inner wall plate are carried out in the underground first floor;

[0030] Step S33: the cast-in-place wall plate is formed by pouring concrete into the pouring cavity;

[0031] Step S34: the installation of the sequential floor beam assembly and the construction of the cast-in-place floor slab are carried out in the support frame;

[0032] Step S35: the installation of the prefabricated prestressed floor slab is carried out on the cast-in-place floor slab before the initial setting of the concrete of the cast-in-place floor slab.

[0033] In some possible implementation manners, the step S5 specifically means that after the construction of all the floor slab assemblies is completed, the bottom surface of the basement is compacted, the steel mesh is laid on the bottom surface, and the prefabricated concrete floor slab is fixedly installed on the steel mesh to form the basement bottom plate.

[0034] Compared with the prior art, the present application has the following beneficial effects:

[0035] The construction efficiency of the present application is high: the prefabricated modular design can greatly reduce the on-site construction time and complexity; the prefabricated guard wall plate, the prefabricated inner wall plate, the prefabricated concrete floor slab and the prefabricated prestressed floor slab are produced in the factory, and only assembly and fixation are required on site, which significantly improves the construction speed; during the on-site construction process, through precise assembly and connection, construction errors can be effectively avoided, and the quality stability of the overall basement is improved;

[0036] The structure stability of the present application is strong: the overall basement is arranged as a multi-layer structure, the use of the cast-in-place floor slab and the cast-in-place column effectively improves the stability and bearing capacity of the structure; the combination of the steel column and the cast-in-place column ensures the uniform distribution of the vertical load, and enhances the anti-seismic performance and safety of the basement;

[0037] The waterproof performance of the application is superior: the pouring cavity is formed between the prefabricated fender and the prefabricated inner wall plate, the first grouting groove and the second grouting groove are designed to effectively improve the waterproof performance, and the uniform distribution of the grouting material can be ensured through the optimization design of the grouting hole and the grouting hole, so that better waterproof effect is realized, and the risk of groundwater penetration is reduced;

[0038] The resource utilization efficiency of the application is high: the on-site concrete pouring amount and construction waste can be minimized, the resource use is optimized, and the environmental impact is reduced; the standardized production and transportation of the prefabricated fender, the prefabricated inner wall plate, the prefabricated concrete floor and the prefabricated prestressed floor also help to reduce the waste of building materials;

[0039] The application has strong adaptability: the system can flexibly adjust the configuration of the prefabricated components according to the needs of different basements, can adapt to various basement design requirements, and improves the flexibility of design and the adaptability of construction;

[0040] In summary, the prefabricated modular basement construction assembly and construction method of the application has superior effects in improving construction efficiency, enhancing structural stability, optimizing waterproof performance, improving construction quality, improving resource utilization efficiency and enhancing design adaptability, and has wide application prospect. BRIEF DESCRIPTION OF DRAWINGS

[0041] Figure 1 It is a structural schematic diagram of the application;

[0042] Figure 2 It is a structural schematic diagram of the corner column, the connecting column and the prefabricated fender in the application;

[0043] Figure 3 It is a structural schematic diagram of the prefabricated fender in the application;

[0044] Figure 4 It is a structural schematic diagram of the support column assembly and the floor assembly in the application;

[0045] Wherein: 1, the enclosure structure; 11, the peripheral assembly; 111, the corner column; 112, the connecting column; 113, the prefabricated fender; 1131, the pouring cavity; 1132, the first grouting groove; 1133, the first grouting hole; 1134, the second grouting hole; 1135, the first grouting hole; 1136, the convex rib column; 11361, the second grouting hole; 12, the prefabricated inner wall plate; 13, the cast-in-place wall plate; 2, the support column assembly; 21, the steel column; 22, the cast-in-place column; 3, the floor assembly; 31, the prefabricated main beam; 32, the secondary beam assembly; 33, the prefabricated prestressed floor; 4, the bottom plate structure; 41, the cast-in-place concrete layer; 42, the prefabricated concrete floor. DETAILED DESCRIPTION

[0046] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements. The "first", "second" and similar words mentioned in the present application do not represent any order, quantity or importance, but only distinguish different components. Similarly, "one" or "a" and the like do not represent a quantity limit, but represent the existence of at least one. In the implementation of the present application, the association relationship of the associated objects is described as "and / or", which means that there can be three relationships, for example, A and / or B can represent: A exists alone, A and B exist together, and B exists alone. In the description of the embodiments of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more. For example, a plurality of positioning columns means two or more positioning columns. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0047] The present application will be described in detail below.

[0048] As Figures 1-4 shown:

[0049] A prefabricated modular basement construction device comprises a surrounding structure 1, a plurality of groups of support column assemblies 2 mounted in the surrounding structure 1, and a floor assembly 3 mounted on the support column assemblies 2;

[0050] The surrounding structure 1 comprises a peripheral assembly 11, a prefabricated inner wall panel 12 mounted on the peripheral assembly 11 and cooperating with the peripheral assembly 11 to form a cavity, and the support column assemblies 2 are mounted in the cavity;

[0051] The peripheral assembly 11 comprises a plurality of groups of vertical corner column bodies 111, a plurality of groups of vertical connection columns 112 arranged between adjacent two groups of corner column bodies 111, and prefabricated guard wall panels 113 arranged between adjacent connection columns 112 and / or corner column bodies 111.

[0052] The prefabricated guard wall panel 113 is provided with a pouring cavity 1131 for pouring concrete to form a cast-in-place wall panel 13 on the side close to the prefabricated inner wall panel 12.

[0053] Specifically, the concrete is waterproof concrete, and the formed cast-in-place wall panel has good waterproof performance.

[0054] The surrounding structure 1 is equivalent to a retaining wall, which provides basic protection for the basement, prevents the soil layer from collapsing inward during construction, and prevents water in the soil layer from penetrating, and the inner side of the peripheral mechanism is fixedly provided with the prefabricated inner wall panel 12.

[0055] The prefabricated interior wall plate 12 is used to provide a support structure for each floor of the basement, and facilitates the decoration construction of the interior wall of the basement;

[0056] The cast-in-place wall plate 13 is arranged between the prefabricated interior wall plate 12 and the prefabricated wall plate 113, further providing additional support structure and protection between each floor of the basement;

[0057] Further, the bottom floor of the basement is also provided with a bottom plate structure 4, which includes a cast-in-place concrete layer 41 and a prefabricated concrete floor 42 arranged on the cast-in-place concrete layer 41; the cast-in-place concrete layer 41 serves as a base layer of the bottom floor of the basement, providing support and isolation, and the upper end of the cast-in-place concrete layer 41 is provided with the prefabricated concrete floor 42, which provides a stable ground for the bottom floor of the basement, facilitating the later waterproofing and other construction projects;

[0058] The support column assembly 2 provides support for the overall structure, and each floor slab assembly 3 is supported by the support column assembly, and two adjacent floor slab assemblies 3 together form a floor of the basement, and the floor slab assembly 3 of the lowest floor and the prefabricated concrete floor 42 together form the lowest floor of the basement.

[0059] In some possible embodiments, the prefabricated wall plate 113 is provided with a first grouting groove 1132 on one side close to the connecting column 112 or the corner column body 111; a first grouting hole 1133 in communication with the first grouting groove 1132 and a second grouting hole 1134 in communication with the pouring cavity 1131 are arranged on the top of the prefabricated wall plate 113;

[0060] A plurality of convex ridge columns 1136 arranged vertically and separating the pouring cavity 1131 into small cavities are arranged in the pouring cavity; a second grouting hole 11361 in communication with two adjacent small cavities is arranged on the convex ridge column 1136;

[0061] The connecting column 112 and the corner column body 111 are provided with a slot close to the prefabricated wall plate 113, the prefabricated wall plate 113 is inserted into the slot, and the first grouting groove 1132 is formed between the prefabricated wall plate 113 and the slot; a first grouting hole 1135 for communicating the first grouting groove 1132 and the pouring cavity 1131 is arranged on the prefabricated wall plate 113.

[0062] The prefabricated wall plate 113 is provided with a first grouting groove 1132 on one side close to the corner column body 111 or the connecting column 112, and a first grouting hole 1133 is arranged on the top of the prefabricated wall plate 113; a first grouting hole 1135 horizontally extending and in communication with the first grouting hole 1133, the first grouting hole 1135 is used for guiding the waterproof concrete in the first grouting hole 1133 into the first grouting groove 1132;

[0063] The prefabricated fender plate 113 is provided with a pouring cavity 1131 on one side close to the prefabricated inner wall plate 12, a plurality of groups of convex prisms 1136 are fixedly arranged in the pouring cavity 1131, the convex prisms 1136 are provided with second grout guide holes 11361, the second grout guide holes 11361 are horizontally arranged, and the top surface of the prefabricated fender plate 113 is further provided with a plurality of groups of second grouting holes 1134 which are in communication with the small cavities, and the second grouting holes 1134 are used for guiding waterproof concrete in the second grouting holes 1134 into the pouring cavity 1131;

[0064] The pouring cavity 1131 is in a groove structure, a plurality of transverse steel bars are fixedly connected in the groove, the transverse steel bars are all embedded with the convex prisms 1136, longitudinal steel bars are respectively fixedly connected in the second grouting grooves between the convex prisms 1136, and the longitudinal steel bars and the transverse steel bars are mutually welded and fixed to form a steel mesh;

[0065] After the waterproof concrete is injected, the pouring cavity 1131 is tightly filled with the outer soil layer, the convex prisms 1136 can increase the contact area between the waterproof concrete and the prefabricated fender plate 113, improve the connection strength between the waterproof concrete and the prefabricated fender plate 113, the steel mesh can be combined with the waterproof concrete to form a composite material, improve the overall strength of the waterproof concrete, improve the overall strength of the prefabricated fender plate 113, and further improve the water seepage resistance.

[0066] Further, the connecting column 112 is an I-shaped channel steel, the corner column bodies 111 are respectively installed at the corner positions of the overall basement, the corner column bodies 111 position the corner positions of the overall basement and provide main support and stability of the corner positions, the adjacent side surfaces of the corner column bodies 111 are respectively provided with combination grooves for facilitating installation of the prefabricated fender plate 113, a plurality of I-shaped channel steels are arranged between the combination grooves of the adjacent corner column bodies 111, the two sides of the I-shaped channel steels are respectively provided with “” type grooves for embedding and fixing the two sides of the prefabricated fender plate 113, improving the overall structural stability, the corner column bodies 111 and the adjacent I-shaped channel steels and the two groups of adjacent I-shaped channel steels are respectively connected by the prefabricated fender plates 113 to form a continuous fender wall surface.

[0067] In some possible embodiments, the support column assembly 2 comprises a steel column 21 arranged in the vertical direction, and a cast-in-place column 22 which is sleeved outside the steel column 21 and has a ring-shaped cross section; the floor assembly 3 is installed on the cast-in-place column 22;

[0068] The internal space of the whole basement is fixedly connected with a plurality of vertically arranged steel columns 21, which provide support for the whole structure. The outer periphery of the steel columns 21 is provided with cast-in-place columns 22, which provide additional support and stability for the steel columns 21, and at the same time provide a mounting and fixing structure for each floor slab assembly 3 of the floor. A plurality of horizontally arranged floor slab assemblies 3 are fixedly connected between the cast-in-place columns 22. Each floor slab assembly 3 forms the ground of the upper layer and the top surface of the lower layer, i.e. the floor slab assemblies 3 adjacent to each other together form each layer of the basement. The lowermost floor slab assembly 3 together with the prefabricated concrete floor forms the lowermost basement.

[0069] In some possible embodiments, the floor slab assembly 3 comprises a plurality of groups of prefabricated main beams 31 embeddedly mounted in the cast-in-place columns 22 or cast-in-place wall panels 13 and cooperatively forming a support frame, a group of secondary beam assemblies 32 connected with the prefabricated main beams 31 and located in the support frame, a cast-in-place floor slab arranged on the group of secondary beam assemblies 32, a prefabricated prestressed floor slab 33 mounted on the cast-in-place floor slab, and a waterproof layer arranged on the prefabricated prestressed floor slab 33.

[0070] The floor slab assembly 3 comprises the prefabricated main beams 31, the group of secondary beam assemblies 32, the cast-in-place floor slab, and the prefabricated prestressed floor slab 33. The two ends of the prefabricated main beams 31 are fixedly connected to the cast-in-place columns 22 and / or the cast-in-place wall panels 13, respectively. A plurality of prefabricated main beams 31 cooperatively form a support frame, which is used to support each floor slab of the basement. The group of secondary beam assemblies 32 is fixedly connected to the support frame by bolts, and cooperatively supports the cast-in-place floor slab with the prefabricated main beams 31.

[0071] The group of secondary beam assemblies 32 and the support frame are fixedly connected to the cast-in-place floor slab. The cast-in-place floor slab is used to provide the main load-bearing surface of the floor. The prefabricated prestressed floor slab 33 is fixedly connected to the upper end of the group of secondary beam assemblies 32 by bolts, which is used to enhance the load-carrying capacity and stability of the floor slab. A waterproof roll is arranged on the prefabricated prestressed floor slab 33, which is used to provide waterproof protection. A waterproof protective layer is cast on the waterproof roll, which is used to increase the durability and protection of the waterproof layer.

[0072] During construction, the construction steps are as follows:

[0073] I. Installation and construction of the enclosure structure 1:

[0074] First step, guide wall construction: excavate a guide trench with a certain depth along the outermost land of the basement. Bind the reinforcement mesh on both sides of the guide trench, and install two groups of mutually parallel standing formworks in the middle part. The formworks are fixed to each other. After the guide wall concrete is completely solidified, the formworks and their fixing parts are removed.

[0075] Second step, with engineering machinery such as grab bucket or underground diaphragm wall excavator, a certain depth of trench is excavated along the guide wall, the trench depth is less than the design depth of the enclosure structure 1, and the trench width is equivalent to or slightly less than the cross-sectional width of the enclosure structure 1;

[0076] Third step, after the trench construction is completed, the corner column body 111 is vertically pressed into the trench in a static pressure manner at the corner position of the trench, and then the I-beam is inserted into the trench between the corner column bodies 111 at a designed interval, and the I-beam is vertically pressed into the trench in a static pressure manner;

[0077] Fourth step, the prefabricated wall plate 113 is hoisted by hoisting equipment, and is inserted between adjacent corner column bodies 111 and / or I-beams, and the prefabricated wall plate 113 is pressed into the trench in a static pressure manner;

[0078] II. Installation and construction of the floor assembly 3:

[0079] First step, a plurality of steel columns 21 are respectively punched into the soil in the enclosure structure 1;

[0080] Second step, the soil in the enclosure structure 1 is gradually excavated from inside to outside, and the excavation depth is the depth of the basement first floor (-1 floor), in this process, the steel column 21 exposed to the ground is surrounded by a steel mesh, and an external formwork is fixed, and the cast-in-place column 22 is formed by pouring concrete, and the prefabricated main beam 31 is respectively fixed and installed at the upper and lower ends of the cast-in-place column 22, until the soil of the basement of this floor is completely excavated, then the steel mesh is fixed and installed on the inner side of the prefabricated wall plate 113, the prefabricated inner wall plate 12 is fixed through the steel mesh, and then the same grade concrete as the prefabricated inner wall plate 12 is poured between the prefabricated inner wall plate 12 and the prefabricated wall plate 113, and the cast-in-place wall plate 13 is formed between the prefabricated inner wall plate 12 and the prefabricated wall plate 113 after the concrete is solidified;

[0081] The pouring of the cast-in-place wall plate 13 is as follows: waterproof concrete is injected through the first grouting hole 1133, the waterproof concrete is injected into the first grouting groove 1132 through the first grouting hole 1135, and the waterproof concrete is injected through the second grouting hole 1134, and the waterproof concrete is injected into the small cavity through the second grouting hole 11361;

[0082] Finally, the prefabricated main beam 31 between the cast-in-place column 22 and the prefabricated inner wall plate 12 at the edge is fixed, so that the prefabricated main beam 31 of the whole floor forms a support frame;

[0083] Thirdly, firstly, the secondary beam assembly 32 is fixedly installed in the support frame, then the steel mesh is fixed between the lower end of the support frame formed by the prefabricated main beam 31 and the secondary beam assembly 32, the support plate is fixed at the lower end of the steel mesh, the support plate is fixedly connected with the support rod at the bottom of the foundation pit, then the concrete is poured above the support frame, and the cast-in-place floor slab is formed after solidification, then the prefabricated prestressed floor slab 33 is fixed at the upper end of the secondary beam assembly 32 before the initial setting of the concrete, so that the construction of the floor slab assembly 3 is completed.

[0084] Fourthly, the upper floor slab assembly 3 of the second floor (-2 floor), the third floor (-3 floor) and the like are sequentially constructed and installed by the above method, and when the last floor is reached, firstly, the ground of the bottom layer of the basement is compacted, the anti-floating anchor rod and the like should be constructed first for the basement with the anti-floating requirement, then the steel mesh is laid on the bottom surface of the basement, the prefabricated concrete floor slab 42 is fixedly installed at the upper end of the steel mesh, and the lowest surface structure is formed after the concrete is poured between the ground of the foundation pit and the prefabricated concrete floor slab.

[0085] Three, waterproof construction:

[0086] After the above steps are completed, the waterproof coiled material is laid on the ground of each floor of the basement, then the waterproof protective layer is poured at the upper end of the waterproof coiled material, and the construction of the overall structure of the basement is completed.

[0087] In the application, at least one earthwork outlet is reserved on each floor slab assembly 3 of the basement, and the transportation of building materials can also be realized through the earthwork outlet.

[0088] In the application, the support frame is respectively taken as a node of the cast-in-place column 22, and a plurality of rectangular or square frames are sequentially formed, the secondary beam assembly 32 is fixedly connected in the formed rectangular or square frame, and the prefabricated prestressed floor slab 33 is also installed in the rectangular or square frame.

[0089] In the same rectangular or square frame, a plurality of prefabricated prestressed floor slabs 33 need to be fixed, and the prefabricated prestressed floor slabs 33 are combined with each other through the tenon and groove.

[0090] In the application, the waterproof concrete is injected into the first grouting groove 1132, so that the two sides of the prefabricated retaining wall plate 113 are respectively formed into a waterproof structure with the I-shaped channel steel or the corner column body 111, the waterproof capacity of the basement is improved, the waterproof concrete is injected into the second grouting hole 1134, the waterproof concrete is injected into the second grouting groove through the second grouting hole 11361, at this time, the waterproof concrete can make the prefabricated retaining wall plate 113 and the surrounding soil layer be tightly combined, and the soil layer subsidence caused by the gap between the soil layers is avoided.

[0091] The application is not restricted to the foregoing specific embodiments. The application extends to any novel one, or any novel combination, of the features disclosed in this specification, and to any novel method or process disclosed in this specification or any novel combination thereof.

Claims

1. A prefabricated modular basement construction device, characterized in that: It includes a housing structure, a plurality of support column assemblies installed in the housing structure, and a floor slab assembly installed on the support column assemblies; The enclosure structure includes a peripheral component, a prefabricated inner wall panel installed on the peripheral component and cooperating with the peripheral component to form a cavity; the support column assembly is installed in the cavity; The peripheral components include a plurality of groups of vertically arranged corner columns, a plurality of groups of vertically arranged connecting columns arranged between two adjacent groups of corner columns, and prefabricated wall panels arranged between adjacent connecting columns and / or corner columns; The prefabricated wall panel is provided with a pouring cavity for pouring concrete to form a cast-in-place wall panel on one side close to the prefabricated inner wall panel; A first grouting groove is provided on one side of the prefabricated wall panel close to the connecting column or corner column; a first grouting hole connected to the first grouting groove and a second grouting hole connected to the grouting cavity are provided on the top of the prefabricated wall panel; a plurality of groups of convex prisms arranged vertically and dividing the grouting cavity into small cavities are provided in the grouting cavity; a second grouting hole connecting two adjacent small cavities is provided on the convex prism; and a steel mesh is provided in the grouting cavity.

2. A prefabricated modular basement construction device according to claim 1, characterized in that: The connecting columns and the corner columns are close to the slots provided on the prefabricated wall panels, and the prefabricated wall panels are plugged into and matched with the slots.

3. A prefabricated modular basement construction device according to claim 2, characterized in that: The support column assembly includes a steel column arranged vertically and a cast-in-place column which is sleeved on the outside of the steel column and has a ring-shaped cross section; the floor slab assembly is installed on the cast-in-place column.

4. A prefabricated modular basement construction device according to claim 3, characterized in that: The floor slab assembly includes multiple groups of prefabricated main beams whose ends are embedded in cast-in-place columns or cast-in-place wall panels and cooperate to form a supporting frame, secondary beam assemblies connected to the prefabricated main beams and located in the supporting frame, cast-in-place floor slabs arranged on the secondary beam assemblies, prefabricated prestressed floor slabs installed on the cast-in-place floor slabs, and waterproof layers arranged on the prefabricated prestressed floor slabs.

5. A construction method of a prefabricated modular basement construction device according to claim 4, characterized in that: Based on the top-down construction method, the following steps are specifically included: Step S1: construction of enclosure structure; Step S2: constructing steel columns in the support column assembly within the enclosure structure; Step S3: excavating the underground first floor and constructing the underground first floor floor slab assembly on the support column assembly; Step S4: Repeat steps S2 and S3 to perform underground multi-layer construction in sequence; Step S5: basement floor construction; Step S6: Perform waterproofing construction on the basement floor and each floor slab assembly to form a waterproof layer.

6. The construction method of a prefabricated modular basement construction device according to claim 5, characterized in that: The step S1 specifically includes the following steps: Step S11: constructing guide walls and forming grooves; Step S12: constructing the corner columns and connecting columns in the trench using a static pressure method, so that the corner columns and connecting columns are inserted into the trench; Step S13: The prefabricated wall panels are hoisted and inserted into adjacent corner columns and / or connecting columns to form a whole.

7. The construction method of a prefabricated modular basement construction device according to claim 5, characterized in that: The step S3 specifically includes the following steps: Step S31: excavating the corresponding earthwork of the underground layer within the retaining structure and performing cast-in-place column construction; Step S32: Install prefabricated main beams and prefabricated interior wall panels on the underground floor; Step S33: pouring concrete into the pouring cavity to form a cast-in-place wall panel; Step S34: installing beam components and constructing cast-in-place floor slabs in sequence within the support frame; Step S35: Install prefabricated prestressed floor slabs on the cast-in-place floor slabs before the concrete of the cast-in-place floor slabs initially sets.

8. The construction method of a prefabricated modular basement construction device according to claim 5, characterized in that: The step S5 specifically refers to: after the construction of all floor slab components is completed, the bottom surface of the basement is compacted, a steel mesh is laid on the bottom surface, and a precast concrete floor is fixedly installed on the steel mesh to form the basement floor.

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