Fabricated combined bottom plate for non-permanent prefabricated open caisson structure

Abstract

The utility model discloses an assembly type combined bottom plate for a non-permanent prefabricated open caisson structure, which comprises a bottom plate main body arranged at the bottom of a well body, the bottom plate main body consists of a steel plate and a concrete plate, and the steel plate is arranged at the top of the concrete plate. The bottom of the steel plate is fixedly connected with the interior of the concrete plate through an anchoring truss; a plurality of open holes penetrating through the top and the bottom of the bottom plate body in the longitudinal direction are formed in the bottom plate body, and a grouting pipe penetrates through each open hole. When the bottom plate main body is installed, bolt connection is adopted, joint bars do not need to be reserved or steel bars do not need to be planted on site, a bottom plate steel reinforcement framework does not need to be built on site, the construction procedure is simplified, the time for secondary cast-in-place pouring and maintenance of bottom sealing concrete and the bottom plate main body is omitted, the construction period is greatly shortened, and the on-site construction quality and efficiency are improved; furthermore, the sealing bottom and the bottom plate are ensured to fully exert corresponding functions respectively, the safety of the whole structure is improved, and the manufacturing cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of caisson structures, in particular to an assembled combined bottom plate used for non-permanent prefabricated caisson structures. Background Art

[0002] In the prior art, before the construction of the bottom plate structure of a non-permanent prefabricated caisson structure, the bottom concrete should generally be poured on site at the bottom of the bottom plate. Only after the strength of the bottom concrete reaches the design requirements can the construction of the upper cast-in-place reinforced bottom plate be carried out.

[0003] Theoretically, the bottom concrete only plays a role in stopping water, and the bottom plate bears the foundation reaction force and the effect of groundwater on the base. The above two are calculated separately; however, in reality, the bottom plate and the bottom concrete jointly bear the foundation reaction force and the effect of groundwater on the base. This non-permanent prefabricated caisson bottom plate structure cast-in-place construction process not only has a long construction period, but also has a high cost;

[0004] At the same time, in order to ensure the reliable connection between the bottom plate and the caisson wall, grooves and inserted bars are generally reserved at the intersection of the well wall and the bottom plate, and post-embedded bars can also be used. However, reserved grooves and inserted bars are not convenient for prefabricating the well wall formwork; post-embedded bars may cause damage to the well wall structure and reduce the safety performance of the overall structure.

[0005] Therefore, how to design a non-permanent prefabricated caisson bottom plate structure that can reduce the project cost while ensuring the safety of the overall structure of the caisson has become a technical problem that technical personnel in this field urgently need to solve. Utility Model Content

[0006] In view of the above-mentioned defects of the prior art, the utility model provides an assembled composite bottom plate for a non-permanent prefabricated caisson structure, the purpose of which is to simplify the construction process and reduce the project cost while ensuring the safety of the overall caisson structure.

[0007] In order to achieve the above technical purpose, the utility model provides an assembled combined bottom plate for a non-permanent prefabricated caisson structure, comprising a bottom plate body arranged at the bottom of the well body, the bottom plate body being composed of a steel plate and a concrete plate, the steel plate being arranged on the top of the concrete plate, and the bottom of the steel plate being fixedly connected to the inside of the concrete plate through an anchor truss;

[0008] The bottom plate body is provided with a plurality of openings extending through the top and bottom of the bottom plate body in the longitudinal direction, and a grouting pipe is inserted into each of the openings;

[0009] The top edge of the bottom plate body is fixedly connected to the inner wall of the well body through a plurality of connecting members arranged in an array;

[0010] Each of the connecting parts includes a first embedded part embedded in the base plate body and a second embedded part embedded in the inner wall of the well body, and angle steels are overlapped on the first embedded part and the second embedded part respectively, and threaded holes are respectively opened in the first embedded part and the second embedded part, and bolt holes are respectively opened in the angle steels at positions corresponding to the threaded holes, and a corresponding pair of the threaded holes and the bolt holes are penetrated by a bolt.

[0011] Preferably, there are multiple anchor trusses, each of which is composed of two toothed web steel bars and one lower chord steel bar, one side of the two web steel bars is fixedly connected by one lower chord steel bar, and the other side of the two web steel bars is welded and fixed to the bottom of the steel plate.

[0012] Preferably, a first gasket matched with the size of the angle steel is arranged between each of the angle steels and the bottom plate body and the well body.

[0013] Preferably, a rubber ring and a second gasket are sequentially arranged between the head of each bolt and the corresponding angle steel.

[0014] Preferably, the cross-section of the well body is circular or rectangular.

[0015] Beneficial effects of the utility model:

[0016] Due to the structural design of the utility model, bolt connection is adopted during installation of the base plate body, and there is no need to reserve dowel bars or plant rebars on site, nor is there any need to build a base plate steel bar skeleton on site, which simplifies the construction process and omits the time for secondary on-site pouring and curing of the bottom cover concrete and the base plate body, greatly shortens the construction period, and improves the on-site construction quality and efficiency; it further ensures that the bottom cover and the base plate can fully play their respective functions, improves the overall structural safety and saves construction costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the utility model when the well body is circular;

[0018] Figure 2 for Figure 1 The enlarged structural diagram at C in the middle;

[0019] Figure 3 for Figure 1 Schematic diagram of the cross-section structure at AA in the middle;

[0020] Figure 4 for Figure 3 The enlarged structural diagram at D in the middle;

[0021] Figure 5 for Figure 1 Schematic diagram of the cross-section structure at the middle BB;

[0022] Figure 6 for Figure 5 The enlarged structural diagram at E in the middle;

[0023] Figure 7 for Figure 5 Structural schematic diagram of the middle anchor truss part;

[0024] Figure 8 for Figure 7 A schematic diagram of the structure from a side view;

[0025] Fig. 9 This is a schematic diagram of the structure of the cap used before construction of the utility model;

[0026] Fig.10 This is a schematic diagram of the structure of the utility model when the well body is rectangular;

[0027] In the figure: 1 bottom plate body, 11 steel plate, 12 concrete plate, 2 well body, 3 anchor truss, 31 web bar reinforcement, 32 lower chord reinforcement, 4 grouting pipe, 5 connecting piece, 51 first embedded part, 52 second embedded part, 53 threaded hole, 54 angle steel, 55 bolt hole, 56 bolt, 6 first gasket, 7 rubber ring, 8 second gasket, 9 lifting ring, 10 cap. DETAILED DESCRIPTION

[0028] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention.

[0029] Example:

[0030] like Figure 1-Figure 8 As shown, the assembled combined bottom plate for non-permanent prefabricated caisson structure includes a bottom plate body 1 arranged at the bottom of a circular well body 2, the bottom plate body 1 is composed of a steel plate 11 and a concrete plate 12, the steel plate 11 is arranged on the top of the concrete plate 12, and the bottom of the steel plate 11 is fixedly connected to the inside of the concrete plate 12 through an anchor truss 3;

[0031] The base plate body 1 is provided with a plurality of openings extending through the top and bottom of the base plate body 1 in the longitudinal direction, each opening having a grouting pipe 4 passing through it. The openings on the base plate body 1 are evenly arranged to facilitate grouting of the bottom of the base plate body 1 after the pre-buried grouting pipe 4 is installed.

[0032] The top edge of the bottom plate body 1 is fixedly connected to the inner wall of the well body 2 through a plurality of connecting members 5 arranged in an array;

[0033] Each connecting part 5 includes a first embedded part 51 embedded in the base plate body 1, and a second embedded part 52 embedded in the inner wall of the well body 2. The first embedded part 51 and the second embedded part 52 do not protrude from the inner wall of the well body 2, which is convenient for formwork. Angle steels 54 are overlapped on the first embedded part 51 and the second embedded part 52, respectively. Threaded holes 53 are respectively opened in the first embedded part 51 and the second embedded part 52, and bolt holes 55 are respectively opened at the positions of the angle steels 54 corresponding to the threaded holes 53. A bolt 56 is penetrated through the corresponding pair of threaded holes 53 and bolt holes 55.

[0034] The main innovation of the utility model is that bolt connection is adopted when installing the base plate, and there is no need to reserve dowel bars or plant reinforcing bars on site, nor is there any need to build a base plate steel bar skeleton on site, which simplifies the construction process and improves the safety of the overall structure.

[0035] like Figure 3 , Figure 5 , Figure 7 and Figure 8 As shown, specifically, multiple anchor trusses 3 are provided and evenly arranged, and one anchor truss 3 is composed of two toothed web reinforcements 31 and a lower chord reinforcement 32, one side of the two web reinforcements 31 is fixedly connected at an angle by a lower chord reinforcement 32, and the other side of the two web reinforcements 31 is welded and fixed to the bottom of the steel plate 11.

[0036] like Figure 2 , Figure 4 and Figure 6 As shown, further, a first gasket 6 matched with the size of the angle steel 54 is arranged between each angle steel 54 and the bottom plate body 1 and the well body 2, which prevents moisture and seepage while making the connection between the components more fitting and firm.

[0037] A rubber ring 7 and a second gasket 8 are arranged in sequence between the head of each bolt 5 and the corresponding angle steel 54. The material of the rubber ring 7 can be selected from water-swelling rubber or silicone to disperse the stress generated by tightening, prevent moisture and seepage, and make the connection between components more fitting and firm.

[0038] like Fig. 9 As shown, before pouring the prefabricated well body 2, a cap 9 can be inserted into the second embedded part 52 of the well body 2. The cap 9 is provided with threads on the outside so that the cap 9 fits tightly with the threaded hole 53 of the second embedded part 52, which can effectively prevent the threaded hole 53 of the second embedded part 52 from being blocked when pouring concrete.

[0039] After pre-filling the foundation pit with sand and gravel to the designed bottom elevation of the base plate body 1, the base plate body 1 is lifted to the installation position to facilitate the vertical positioning of the base plate body 1. Before installing the base plate body 1, remove the cap 9 that blocks the threaded hole 53 on the first embedded part 51, and tighten the angle steel 54 with the first embedded part 51, the second embedded part 52 and the base plate body 1 with bolts 56 to complete the installation.

[0040] like Fig.10 As shown, in some embodiments, the shape of the well body 2 is rectangular, and the well body 2 may also be in other shapes without limitation.

[0041] In summary, the utility model is convenient for supporting the formwork when pouring the well body 2, and the bottom plate main body 1 is connected by bolts 56 during installation. There is no need to reserve dowel bars or plant dowel bars on site, and there is no need to build a bottom plate steel frame on site, which simplifies the construction process. The use of an assembled bottom plate main body 1 not only omits the time for secondary on-site pouring and curing of the bottom cover concrete and the bottom plate main body 1, greatly shortens the construction period, and improves the on-site construction quality and efficiency; it also ensures that the bottom cover and the bottom plate main body 1 fully exert their corresponding functions, improves the overall structural safety and saves construction costs; and the assembled bottom plate main body 1 has a high degree of industrialization and assembly and can be reused.

[0042] The preferred specific embodiments of the utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should be within the scope of protection determined by the claims.

Claims

1. An assembled composite floor for a non-permanent prefabricated caisson structure, comprising a floor body arranged at the bottom of the well body, characterized in that: The bottom plate body is composed of a steel plate and a concrete plate, the steel plate is arranged on the top of the concrete plate, and the bottom of the steel plate is fixedly connected to the inside of the concrete plate through an anchor truss; The bottom plate body is provided with a plurality of openings extending through the top and bottom of the bottom plate body in the longitudinal direction, and a grouting pipe is inserted into each of the openings; The top edge of the bottom plate body is fixedly connected to the inner wall of the well body through a plurality of connecting members arranged in an array; Each of the connecting parts includes a first embedded part embedded in the base plate body and a second embedded part embedded in the inner wall of the well body, and angle steels are overlapped on the first embedded part and the second embedded part respectively, and threaded holes are respectively opened in the first embedded part and the second embedded part, and bolt holes are respectively opened in the angle steels at positions corresponding to the threaded holes, and a corresponding pair of the threaded holes and the bolt holes are penetrated by a bolt.

2. The assembled composite bottom plate for a non-permanent prefabricated caisson structure according to claim 1, characterized in that: There are multiple anchor trusses, each of which is composed of two toothed web steel bars and one lower chord steel bar. One side of the two web steel bars is fixedly connected by a lower chord steel bar, and the other side of the two web steel bars is welded and fixed to the bottom of the steel plate.

3. The assembled composite bottom plate for a non-permanent prefabricated caisson structure according to claim 2, characterized in that: A first gasket matched with the size of the angle steel is arranged between each of the angle steels and the bottom plate body and the well body.

4. The assembled composite bottom plate for a non-permanent prefabricated caisson structure according to claim 3, characterized in that: A rubber ring and a second gasket are arranged in sequence between the head of each bolt and the corresponding angle steel.

5. The assembled composite bottom plate for a non-permanent prefabricated caisson structure according to any one of claims 1 to 4, characterized in that: The cross section of the well body is circular or rectangular.

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