CN113802615A

CN113802615A - A waterproof structure of underground assembled laminated shear wall

Info

Publication number: CN113802615A
Application number: CN202110958626.3A
Authority: CN
Inventors: 钟紫蓝; 李广帆; 李锦强; 史跃波; 韩春堂; 冯立倩
Original assignee: Beijing University of Technology
Current assignee: Beijing University of Technology
Priority date: 2021-08-20
Filing date: 2021-08-20
Publication date: 2021-12-17

Abstract

The invention discloses an underground assembled superposed shear wall waterproof structure which comprises five parts, namely concrete cast first, a prefabricated superposed slab, concrete cast later, a spliced seam and wall surface waterproof. The structure is provided with a plurality of waterproof measures, the structure of the cast-in-place concrete is in a socket joint type, and a galvanized steel plate water stop is arranged in the middle of the cast-in-place concrete; grouting holes and grout outlet holes of the grouting sleeve in the structural prefabricated composite slab are positioned in the cavity; the structure is provided with a water-swelling rubber ring, an elastic sealing rubber ring and a sealant when the laminated slab is assembled; the structure also sets up the outer wall simultaneously waterproof. The structure can improve the waterproof performance of the outer wall of the fabricated building, can effectively improve the construction efficiency, and is high in applicability and simple and easy to realize.

Description

Underground assembly superposed shear wall waterproof structure

Technical Field

The invention belongs to the technical field of structural engineering waterproofing, and particularly relates to an underground assembly type structural joint waterproofing device.

Background

With the continuous acceleration of the urbanization process of China and the continuous development of infrastructure, the state is vigorously implementing the construction of urban comprehensive pipe galleries. The urban underground comprehensive pipe gallery is characterized in that more than two urban underground pipelines (namely water supply, drainage, electric power, gas, communication, heat, energy and the like) are intensively arranged in the same tunnel space. The maintenance port, the lifting port and the monitoring system are arranged, unified design and centralized management are implemented, an intensive city infrastructure is formed, and an important 'life line' for city operation is guaranteed.

The traditional underground structure shear wall is waterproof only aiming at an assembly type shear wall or a cast-in-place shear wall, and the assembly type superposed shear wall is a semi-assembly type shear wall body (consisting of two prefabricated reinforced concrete plates which are positioned at the outer side and connected through truss steel bars and cast-in-place concrete positioned inside, and the wall body is connected in a lap joint mode by inserting horizontal and vertical steel bars into a post-pouring cavity). The assembled superposed shear wall is applied to an underground structure, reduces the existence of splicing seams by combining the particularity of the structure, can play an effective waterproof role, and can also combine the advantages of an assembled and cast-in-place structure waterproof device to realize multilayer waterproof setting.

Disclosure of Invention

Aiming at the novel assembly type structure, the waterproof device for the joint of the novel underground structure is provided, the waterproof device is good in waterproof effect, convenient to install, wide in application range and complete in function.

The invention provides a waterproof device for a splicing seam of an assembly superposed shear wall structure, which is characterized by comprising the following components: firstly pouring concrete (A), secondly pouring concrete (B), prefabricating laminated slabs (C), splicing seams (D) and a waterproof coating (E) on the outer side of the shear wall; the prefabricated composite slab is characterized in that the prefabricated composite slab is formed by firstly pouring concrete (A) and prefabricated composite slab (C) in an assembling mode through reserved splicing seams (D), when the strength of a joint reaches a certain degree, later pouring concrete (B) is poured, and finally a waterproof coating (E) is smeared on the outer side of the outer wall.

Furthermore, firstly pouring concrete (A), firstly binding the reinforcement cage (1), then erecting a formwork, fixing the position of the galvanized steel plate waterstop (2), and finally pouring concrete.

Furthermore, the prefabricated composite slab (C) comprises two parts, namely a stressed longitudinal rib (3) and a grouting sleeve (4). Firstly, the bottom of the stressed longitudinal rib (3) is spirally polished, and then the stressed longitudinal rib (3) and the grouting sleeve (4) are connected through bolts. And PVC pipes are connected with grouting holes (12) and grout outlet holes (13) of the grouting sleeves before the reinforcement cages of the prefabricated composite slabs (C) are bound, the holes of the grouting sleeves (4) are arranged on the inner side of the wall body during binding and are led out from the cavity through the PVC pipes, and the PVC pipes are removed after grouting.

Furthermore, the splicing seam (D) at the splicing part of the cast-in-place concrete (D) and the prefabricated composite slab (C) comprises a water-swelling rubber ring (5), an elastic sealing rubber ring (6) and a sealant (7). And arranging the rubber ring before assembly, and sealing with a sealant (7) after arrangement and assembly are finished.

Further, the outer side (E) of the shear wall comprises a 20mm thick 1:3 cement mortar leveling layer (8), a waterproof coiled material waterproof layer (9), a 50mm thick foam board soft soil protective layer (10) and backfill soil (11), and the four parts are subjected to layered smearing treatment.

Compared with the prior art, the invention has the following remarkable characteristics:

1. the prefabricated composite slab in the assembled superposed shear wall has lighter weight in unit area, so the prefabricated length is longer, the construction of splicing seams can be continuously carried out, and the time saving, the convenience and the high industrialization degree are realized.

2. The assembled superposed shear wall comprises the assembled part and the cast-in-place part, so that the waterproof advantage of the assembled splicing joint can be exerted, and the waterproof advantage of the cast-in-place structural construction joint can be exerted.

3. The slip casting mouth and the grout outlet of the grout sleeve of structure all lie in prefabricated superimposed sheet inboard, and the inside cavity of wall body also can realize the inside slip casting demand of sleeve when reducing the wall body gap.

4. This watertight fittings has realized that quartic waterproof construction arranges: the cast-in-place section adopts a socket joint type extended seepage path to carry out primary waterproofing; a galvanized steel plate waterstop is also arranged at the cast-in-place section for secondary water prevention; when the prefabricated laminated slab is assembled, a water-swelling rubber ring, an elastic sealing rubber ring and sealant are arranged for three-time waterproofing; and finally, coating a waterproof coating on the outer side of the wall body for waterproof for four times.

Drawings

To more clearly illustrate the technical solution of the present invention, the drawings required in the description of the embodiments are briefly introduced below, the drawings are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts:

FIG. 1 is a schematic plan view of the present invention.

Fig. 2 is an enlarged view of a portion D in fig. 1.

Fig. 3 is an enlarged view of a portion E in fig. 1.

Figure 4 is a schematic view of a grout sleeve.

Wherein, A-casting concrete in advance; b, post-pouring concrete; c-prefabricating a laminated slab; d, splicing seams; e-waterproof paint on the outer side of the shear wall; 1-bottom reinforcement cage; 2-galvanized steel sheet waterstop; 3-stressed longitudinal bars; 4-grouting a sleeve; 5-water swelling rubber ring; 6-elastic sealing rubber ring; 7-sealing glue; 8-20mm thick 1:3, leveling a cement mortar leveling layer; 9-waterproof coiled material waterproof layer; a foam board soft protective layer with the thickness of 10-50 mm; 11-backfilling; 12-grouting holes; 13-grout outlet.

Detailed Description

For the purpose of better understanding the objects, technical solutions and advantages of the present invention, the following detailed description of the present invention is provided in conjunction with the embodiments and the accompanying drawings, it being understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present invention.

The invention discloses an underground assembled superposed shear wall waterproof structure, which comprises the following components in percentage by weight as shown in figure 1: the concrete is cast in advance (A), the concrete is cast in the later (B), the composite slab is prefabricated (C), the splicing seams (D) and the waterproof coating (E) on the outer side of the shear wall. The construction steps are as follows:

firstly, the stressed steel bars (3) of the cast-in-place reinforced concrete reinforcement cage (1) and the prefabricated laminated slab (C) are respectively bound, the position of the galvanized steel plate waterstop (2) is determined, and then, the formwork is respectively erected and concrete is poured. When intensity reaches certain degree, place water-swelling rubber circle (5) and elasticity sealing rubber circle (6) and assemble, accomplish back rethread cavity PVC pipe and carry out the slip casting, at last grout again reaches certain intensity after, tear off the PVC pipe and paint sealed glue (7) to the splice seam outside. And after the prefabricated laminated slab and the cast-in-advance concrete are assembled, the formwork is erected for casting, the concrete (B) is cast, and the outer side of the shear wall is maintained for a certain time to form a waterproof coating (E).

The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that are not thought of by the inventive work should be within the scope of the present invention.

Claims

1. An underground assembly superimposed shear wall waterproof structure is characterized in that, comprising: pouring concrete (A) first, pouring concrete (B) after, prefabricated laminated board (C), splicing joint (D) and shear force Waterproof coating (E) on the outside of the wall; first pour concrete (A) and prefabricated laminated board (C) for assembly and connection through reserved joints (D), when the strength of the joint reaches a certain level, pour concrete after pouring ( B), and finally apply a waterproof coating (E) on the outside of the exterior wall.

2. A kind of underground assembly superimposed shear wall waterproof structure according to claim 1, is characterized in that, first pour concrete (A) to carry out the binding of reinforcement cage (1) first, then support formwork and fix galvanized steel plate to stop. The location of the hose (2), and finally the concrete is poured.

3. A kind of underground assembly superimposed shear wall waterproof structure according to claim 1, is characterized in that, in the prefabricated laminated board (C), contains two parts of stressed longitudinal reinforcement (3) and grouting sleeve (4); First, screw grinding is performed on the bottom of the longitudinal reinforcement (3) under force, and then the longitudinal reinforcement (3) and the grouting sleeve (4) are connected by bolts; The grouting hole (12) and the grouting hole (13) are connected to the PVC pipe. When binding, the hole of the grouting sleeve (4) is inside the wall and is drawn out from the cavity through the PVC pipe. After grouting, the PVC pipe is removed.

4. a kind of underground assembly superimposed shear wall waterproof structure according to claim 1, is characterized in that, the splicing joint (D) at the assembling place of first pouring concrete (D) and prefabricated laminated board (C) comprises water contact The expansion rubber ring (5), the elastic sealing rubber ring (6) and the sealant (7) are composed of three parts; the rubber ring is arranged before assembly, and the sealant (7) is used for sealing treatment after the arrangement and assembly are completed.

5. a kind of underground assembly superimposed shear wall waterproof structure according to claim 1, is characterized in that, shear wall outer side (E) comprises 20mm thick 1:3 cement mortar leveling layer (8), waterproof membrane waterproof Layer (9), 50mm thick foam board soft soil protection layer (10) and backfill soil (11) four parts, layered coating treatment.

6. a kind of underground assembly superimposed shear wall waterproof structure according to claim 1 is characterized in that, the construction step of changing the structure is as follows: first bind the reinforced concrete reinforcement cage (1) and prefabricated laminated board (C ) and determine the position of the galvanized steel waterstop (2), and then respectively support the formwork and pour concrete; when the strength reaches a certain level, place the water-swellable rubber ring (5) and elastic seal The rubber ring (6) is assembled, and after completion, grouting is carried out through the PVC pipe in the cavity. Finally, after the grouting material reaches a certain strength, the PVC pipe is removed and the sealant (7) is applied to the outside of the joint; After the plywood and the first poured concrete are assembled, the formwork is poured and then the concrete is poured (B), and a waterproof coating (E) is applied on the outside of the shear wall for a certain period of time.