Underground structure permanent assembly whole process prefabrication system and construction method thereof

Abstract

The invention relates to the technical field of engineering structures, and particularly discloses an underground structure permanent assembly whole-process prefabrication system and a construction method thereof, the underground structure permanent assembly whole-process prefabrication system comprises enclosure members, structural permanent columns, a first support, a second support, a uniform stirring body and a structural outer wall; a plurality of enclosure components and a plurality of structural permanent columns are arranged; the enclosure components are distributed in parallel along the uniform stirring body and are distributed in a staggered manner in the vertical direction; one sides of the multiple enclosure components are detachably connected into the uniform stirring body to form a prefabricated enclosure wall, the prefabricated enclosure wall and the basement structural wall are combined to form a combined outer wall structure, and a second concrete enclosure purlin is fixedly arranged on the other sides of the multiple enclosure components; a first concrete enclosing purlin is fixedly arranged on the upper end faces of the enclosure components. According to the method, assembly of the construction process can be achieved, the construction speed and the construction quality are effectively controlled, overall stress of the underground structure is achieved, and deformation generated in the construction process of the underground structure and the influence on the surrounding environment are effectively controlled.

Description

Technical Field

[0001] The present invention relates to the technical field of engineering structures, and in particular to a full-process prefabrication system for permanent assembly of underground structures and a construction method thereof. Background Art

[0002] In traditional underground deep foundation pit projects, conventional support structures are generally temporary projects. In the later stage, in conjunction with the basement structure construction, the original internal support also needs to be removed. After the earth is backfilled to the ground, the support structure will not only lose its original function, but the vertical retaining piles will form underground obstacles. The removal process of the original internal support will also cause noise pollution and environmental pollution.

[0003] In traditional underground projects, vertical retaining piles, basement structural walls, internal supports and structural beams and columns are separate load-bearing structures, which will increase the construction cost of the overall underground project, consume time and energy, and cause unnecessary waste. Conventional support structures are mostly cast-in-place, and the on-site construction quality is difficult to control, resulting in construction hazards. Summary of the invention

[0004] In order to solve the above-mentioned problems existing in the prior art, the present invention provides a prefabricated system for the entire process of permanent assembly of an underground structure and a construction method thereof, which can realize the assembly of the construction process, effectively control the construction speed and construction quality, realize the overall force of the underground structure, and effectively control the deformation generated during the construction of the underground structure and the impact on the surrounding environment.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A full-process prefabrication system for permanent assembly of underground structures, including enclosure components, permanent structural columns, first-line supports, second-line supports, uniform mixing bodies and structural exterior walls;

[0007] There are multiple enclosure components and multiple permanent structural columns, and the multiple enclosure components are distributed in parallel along the uniform stirring body and staggered in the vertical direction;

[0008] One side of the plurality of enclosure components is detachably connected to the uniform mixing body to form a prefabricated enclosure wall, and the prefabricated enclosure wall is combined with the basement structural wall to form a combined exterior wall structure. A second concrete enclosure purlin is fixedly arranged on the other side of the plurality of enclosure components, and a first concrete enclosure purlin is fixedly arranged on the upper end surface of the plurality of enclosure components.

[0009] Furthermore, one end of the first concrete purlin is detachably connected to the uniform mixing body, and the other end of the first concrete purlin is fixedly connected to the first support.

[0010] Furthermore, a beam-column node is fixedly provided at one end of the first support away from the first concrete purlin, and the upper end of the permanent structural column is fixedly connected to the beam-column node.

[0011] Furthermore, the first support includes a trestle plate, a floor plate and a beam, the two ends of the trestle plate are respectively fixedly connected between the beam-column node and the first concrete purlin, the beam is fixedly connected to a first placement groove opened at the upper end of the trestle plate, and the floor plate is fixedly connected to the upper end surface of the trestle plate.

[0012] Furthermore, one end of the second concrete purlin away from the enclosure component is fixedly connected to the second support.

[0013] Furthermore, a beam-column node is fixedly provided at one end of the second support away from the second concrete purlin, and the middle position of the permanent column of the structure is fixedly connected to the beam-column node.

[0014] Furthermore, the second support includes a floor slab and a beam, both ends of the beam are respectively fixedly connected between the beam-column node and the second concrete purlin located below, and the floor slab is fixedly connected to the upper end surface of the beam.

[0015] Furthermore, the plurality of permanent structural columns are distributed in parallel and staggered in the vertical direction, there are a plurality of the first support and a plurality of the second support, and the plurality of the first supports and the plurality of the second supports are distributed in parallel.

[0016] Furthermore, the first support and the second support are prefabricated supports or cast-in-place supports, and the first support and the second support are used for horizontal internal supports and structural beams and columns, and the first support and the second support do not need to be removed.

[0017] A construction method for a full-process prefabrication system for permanent assembly of an underground structure comprises the following steps:

[0018] S1: Construct cement soil to form a uniform mixing body, implant enclosure components in the uniform mixing body to form a prefabricated enclosure wall, pre-embed steel bar connectors at the bottom plate and top beam of the enclosure components, and construct permanent structural columns at the same time;

[0019] S2: Assemble the first support and cast beams and beam-column joints;

[0020] S3: Construction of the trestle slab and excavation of the first support undercut;

[0021] S4: When the second support position is to be excavated, the first support is assembled, and the second concrete purlin and beam-column joint are constructed;

[0022] S5: Excavate the lower earthwork of the second support, and after the bottom of the cushion layer of the bottom plate is excavated, cast the structural bottom plate in situ, and the structural bottom plate is effectively connected with the prefabricated enclosure wall through the pre-buried steel bar connector;

[0023] S6: construct the basement exterior wall. When the construction reaches the second support position, construct the second support floor slab;

[0024] S7: Continue to construct the basement exterior wall. When the construction reaches the first support position, cast the first support floor slab in situ, and effectively connect the basement exterior wall with the prefabricated retaining wall through the steel connector, thereby forming a full-process prefabrication system for permanent assembly of the underground structure.

[0025] The beneficial effects of the present invention are:

[0026] (1) By setting the enclosure components, the uniform mixing body, the first support and the second support, the technical effect that can be achieved is to construct the cement soil to form a uniform mixing body, implant the enclosure components in the uniform mixing body to form a prefabricated enclosure wall, pre-embed the steel bar connectors at the bottom plate and the top beam of the enclosure components, and construct the permanent columns of the structure at the same time;

[0027] The prefabricated system realizes the coordinated force of the underground structure, effectively controls the deformation caused by the construction process of the underground structure and the impact on the surrounding environment, realizes the assembly of the underground structure, turns the temporary structure into a permanent structure, and turns waste into treasure. It has the advantages of low cost, convenient construction, good integrity, and green environmental protection. The prefabricated retaining wall is combined with the basement structural wall to form a combined exterior wall structure with high overall rigidity, which can ensure the ability of the underground structure to resist deformation and realize the integrity and waterproof effect of the underground exterior wall structure.

[0028] (2) By providing enclosure components, permanent structural columns and a uniform mixing body, the technical effect that can be achieved is that there are multiple enclosure components and multiple permanent structural columns, the multiple enclosure components are distributed in parallel along the uniform mixing body and staggered in the vertical direction, one side of the multiple enclosure components can be detachably connected in the uniform mixing body to form a prefabricated enclosure wall, the prefabricated enclosure wall is combined with the basement structural wall to form a combined exterior wall structure, a second concrete enclosure purlin is fixedly provided on the other side of the multiple enclosure components, and a first concrete enclosure purlin is fixedly provided on the upper end surface of the multiple enclosure components;

[0029] Prefabricated retaining walls can take into account the functions of retaining soil and water, are easy to construct, have controllable quality, and have good water-stopping effects. By pre-embedding steel connectors in the prefabricated retaining walls and forming a combined exterior wall structure with the basement structural wall, the combined exterior wall structure has good integrity, greater rigidity, and a strong ability to resist overall deformation, thereby realizing the overall force of the underground structure and effectively controlling the deformation of the underground structure during construction and the impact on the surrounding environment. Compared with conventional support structures and basement structures, this structural system greatly reduces energy consumption and construction waste, and has higher social and economic benefits.

[0030] (3) By setting the first support and the second support, the technical effect that can be achieved is that the end of the first support away from the first concrete purlin is fixedly provided with a beam-column node, the upper end of the permanent column of the structure is fixedly connected to the beam-column node, the first support includes a trestle plate, a floor plate and a beam, the two ends of the trestle plate are respectively fixedly connected between the beam-column node and the first concrete purlin, the beam is fixedly connected to the first placement groove opened at the upper end of the trestle plate, the floor plate is fixedly connected to the upper end surface of the trestle plate, and the end of the second concrete purlin away from the enclosure member is fixedly connected to the second support;

[0031] The first support is connected with the retaining pressure beam to form an integral replacement for the structural top plate. The second concrete purlin of the second support is cast-in-place at the same time as the basement structural wall at the corresponding local position to ensure the removal of the second concrete purlin in the later stage. Waterstop steel sheets are set to ensure the waterstop requirements of the basement structural wall. The prefabricated and assembled spliced ​​support has the functions of horizontal internal support and structural beams and columns. Compared with conventional internal supports, it does not need to be removed, which saves the construction cost and construction period of traditional internal supports. In addition, it can effectively control the deformation of the foundation pit during the excavation process. The on-site installation efficiency of the factory-prefabricated support beams is greatly improved, which can ensure the construction quality and construction period requirements of the overall project. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0033] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0034] Description of main component symbols:

[0035] In the figure: 1. Enclosure components; 2. Uniform mixing body; 3. First support; 4. Second support; 5. Beam-column joint; 6. Second concrete purlin; 7. Structural permanent column; 8. First concrete purlin. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application; obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application without making creative work are within the scope of protection of the present application.

[0037] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0038] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0039] Reference Figure 1 , which is a full-process prefabrication system for permanent assembly of underground structures disclosed in the present invention, including a enclosure component 1, a permanent structural column 7, a first support 3, a second support 4, a uniform mixing body 2 and a structural outer wall.

[0040] There are multiple enclosure components 1 and permanent structural columns 7, and the multiple enclosure components 1 are distributed in parallel along the uniform stirring body 2 and staggered in the vertical direction.

[0041] One side of the multiple enclosure components 1 can be detachably connected in the uniform mixing body 2 to form a prefabricated enclosure wall, and the prefabricated enclosure wall is combined with the basement structural wall to form a combined exterior wall structure. A second concrete enclosure purlin 6 is fixedly arranged on the other side of the multiple enclosure components 1, and a first concrete enclosure purlin 8 is fixedly arranged on the upper end surface of the multiple enclosure components 1.

[0042] One end of the first concrete purlin 8 is detachably connected to the uniform mixing body 2 , and the other end of the first concrete purlin 8 is fixedly connected to the first support 3 .

[0043] A beam-column node 5 is fixedly provided at one end of the first support 3 away from the first concrete purlin 8 , and the upper end of the permanent structural column 7 is fixedly connected to the beam-column node 5 .

[0044] The first support 3 includes a trestle plate, a floor plate and a beam. The two ends of the trestle plate are respectively fixedly connected between the beam-column node 5 and the first concrete purlin 8. The beam is fixedly connected to the first placement groove opened at the upper end of the trestle plate, and the floor plate is fixedly connected to the upper end surface of the trestle plate.

[0045] One end of the second concrete purlin 6 away from the enclosure member 1 is fixedly connected to the second support 4 .

[0046] A beam-column node 5 is fixedly provided at one end of the second support 4 away from the second concrete purlin 6 , and the middle position of the structural permanent column 7 is fixedly connected to the beam-column node 5 .

[0047] The second support 4 includes a floor slab and a beam. Both ends of the beam are fixedly connected between the beam-column node 5 and the second concrete purlin 6, and the floor slab is fixedly connected to the upper end surface of the beam.

[0048] Multiple permanent structural columns 7 are distributed in parallel and staggered in the vertical direction. There are multiple first supports 3 and multiple second supports 4. Multiple first supports 3 and multiple second supports 4 are distributed in parallel.

[0049] The prefabricated system realizes the coordinated force of the underground structure, effectively controls the deformation caused by the construction process of the underground structure and the impact on the surrounding environment, realizes the assembly of the underground structure, turns the temporary structure into a permanent structure, and turns waste into treasure. It has the advantages of low cost, convenient construction, good integrity, and green environmental protection.

[0050] The prefabricated enclosure wall is combined with the basement structural wall to form a combined exterior wall structure with high overall rigidity, which can ensure the underground structure's ability to resist deformation and achieve the integrity and waterproof effect of the underground exterior wall structure.

[0051] Prefabricated retaining walls can take into account the functions of retaining soil and water, are easy to construct, have controllable quality, and have good water-stopping effects. By pre-embedded steel connectors in the prefabricated retaining walls and the basement structural walls, a combined exterior wall structure is formed. The combined exterior wall structure has good integrity, greater rigidity, and a strong ability to resist overall deformation, thereby realizing the overall force of the underground structure and effectively controlling the deformation caused during the construction of the underground structure and the impact on the surrounding environment.

[0052] Compared with conventional supporting structures and basement structures, this structural system greatly reduces energy consumption and construction waste, and has higher social and economic benefits.

[0053] The first support 3 is connected with the retaining pressure beam to form an integral replacement for the structural top plate. The second concrete purlin 6 of the second support 4 is cast in situ simultaneously with the basement structural wall at the corresponding local position to ensure the removal of the second concrete purlin 6 at a later stage, and water-stop steel sheets are provided to ensure the water-stopping requirements of the basement structural wall.

[0054] Prefabricated and assembled spliced ​​supports have the functions of both horizontal internal supports and structural beams and columns. Compared with conventional internal supports, they do not need to be dismantled, saving the construction cost and construction period of traditional internal supports. In addition, they can effectively control the deformation of the foundation pit during the excavation process. The on-site installation efficiency of factory-prefabricated support beams is greatly improved, which can ensure the construction quality and construction period requirements of the overall project.

[0055] The first support 3 and the second support 4 are prefabricated supports or cast-in-place supports. The first support 3 and the second support 4 are used for horizontal internal supports and structural beams and columns. The first support 3 and the second support 4 do not need to be removed.

[0056] A construction method for a full-process prefabrication system for permanent assembly of an underground structure comprises the following steps:

[0057] S1: Construct cement soil to form a uniform mixing body 2, implant enclosure components 1 in the uniform mixing body 2 to form a prefabricated enclosure wall, pre-embed steel bar connectors at the bottom plate and top beam of the enclosure components 1, and construct permanent structural columns 7 at the same time;

[0058] S2: Assemble the first support 3, cast the beam and beam-column joint 5;

[0059] S3: Construction of the trestle deck, excavation of the first support 3 earthwork;

[0060] S4: When the position of the second support 4 is to be excavated, the first support 3 is assembled, and the second concrete purlin 6 and the beam-column joint 5 are constructed;

[0061] S5: excavate the lower earthwork of the second support 4, and after the bottom position of the cushion layer of the bottom plate is excavated, cast the structural bottom plate in situ, and the structural bottom plate is effectively connected with the prefabricated enclosure wall through the pre-buried steel bar connector;

[0062] S6: construct the basement exterior wall. When the construction reaches the position of the second support 4, construct the floor slab of the second support 4.

[0063] S7: Continue to construct the basement exterior wall. When the construction reaches the position of the first support 3, cast the floor slab of the first support 3 in situ, and effectively connect the basement exterior wall with the prefabricated enclosure wall through the steel bar connector, thereby forming a full-process prefabrication system for permanent assembly of the underground structure.

[0064] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A full-process prefabrication system for permanent assembly of underground structures, characterized by: It comprises a enclosure component (1), a permanent structural column (7), a first support (3), a second support (4), a uniform mixing body (2) and a structural outer wall; There are a plurality of the enclosure components (1) and the permanent structural columns (7), and the plurality of enclosure components (1) are distributed in parallel along the uniform stirring body (2) and staggered in the vertical direction; One side of the plurality of enclosure components (1) is detachably connected to the uniform mixing body (2) to form a prefabricated enclosure wall, and the prefabricated enclosure wall is combined with the basement structural wall to form a combined exterior wall structure. A second concrete enclosure purlin (6) is fixedly arranged on the other side of the plurality of enclosure components (1), and a first concrete enclosure purlin (8) is fixedly arranged on the upper end surface of the plurality of enclosure components (1).

2. The full-process prefabrication system for permanent assembly of underground structures according to claim 1 is characterized by: One end of the first concrete purlin (8) is detachably connected to the uniform mixing body (2), and the other end of the first concrete purlin (8) is fixedly connected to the first support (3).

3. The full-process prefabrication system for permanent assembly of underground structures according to claim 2 is characterized by: A beam-column node (5) is fixedly provided at one end of the first support (3) away from the first concrete purlin (8), and the upper end of the structural permanent column (7) is fixedly connected to the beam-column node (5).

4. The underground structure permanent assembly full-process prefabrication system according to claim 3 is characterized by: The first support (3) comprises a trestle plate, a floor plate and a beam, the two ends of the trestle plate are respectively fixedly connected between the beam-column node (5) and the first concrete purlin (8) located above, the beam is fixedly connected to a first placement groove opened at the upper end of the trestle plate, and the floor plate is fixedly connected to the upper end surface of the trestle plate.

5. The underground structure permanent assembly full-process prefabrication system according to claim 1 is characterized by: One end of the second concrete purlin (6) away from the enclosure component (1) is fixedly connected to the second support (4).

6. The underground structure permanent assembly full-process prefabrication system according to claim 5 is characterized by: A beam-column node (5) is fixedly provided at one end of the second support (4) away from the second concrete purlin (6), and the middle position of the structural permanent column (7) is fixedly connected to the beam-column node (5).

7. The underground structure permanent assembly full-process prefabrication system according to claim 6 is characterized by: The second support (4) comprises a floor slab and a beam, the two ends of the beam are respectively fixedly connected between the beam-column node (5) and the second concrete purlin (6), and the floor slab is fixedly connected to the upper end surface of the beam.

8. The underground structure permanent assembly full-process prefabrication system according to claim 1 is characterized by: The plurality of permanent structural columns (7) are distributed in parallel and staggered in the vertical direction. There are a plurality of the first support (3) and a plurality of the second support (4). The plurality of the first support (3) and the plurality of the second support (4) are distributed in parallel.

9. The underground structure permanent assembly full-process prefabrication system according to claim 1 is characterized by: The first row of supports (3) and the second row of supports (4) are prefabricated supports or cast-in-place supports. The first row of supports (3) and the second row of supports (4) are used for horizontal internal supports and structural beams and columns. The first row of supports (3) and the second row of supports (4) do not need to be removed.

10. A construction method for a full-process prefabrication system for permanent assembly of an underground structure, applied to the prefabrication system as claimed in any one of claims 1 to 9, characterized in that: The following steps are involved: S1: construct cement soil to form a uniform mixing body (2), implant enclosure components (1) in the uniform mixing body (2) to form a prefabricated enclosure wall, pre-embed steel bar connectors at the bottom plate and top beam of the enclosure components (1), and simultaneously construct permanent structural columns (7); S2: Assemble the first support (3), cast the beam and beam-column joint (5); S3: Construction of the trestle deck and excavation of the earthwork under the first support (3); S4: When the position of the second support (4) is to be excavated, the first support (3) is assembled, and the second concrete purlin (6) and beam-column joint (5) are constructed; S5: excavate the lower earth of the second support (4), and after the bottom of the cushion layer of the bottom plate is excavated, cast the structural bottom plate in situ, and the structural bottom plate is effectively connected with the prefabricated enclosure wall through the pre-buried steel bar connector; S6: construct the basement exterior wall, and when the construction reaches the position of the second support (4), construct the floor slab of the second support (4); S7: Continue to construct the basement exterior wall. When the construction reaches the position of the first support (3), cast the floor slab of the first support (3) in situ, and effectively connect the basement exterior wall with the prefabricated enclosure wall through the steel bar connector, thereby forming a full-process prefabrication system for permanent assembly of the underground structure.

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