CN219690530U - A kind of foundation pit structure molding waterproof construction structure - Google Patents

Abstract

A foundation pit structure molding waterproof construction structure, including a structural bottom plate and a structural side wall. The structural bottom plate is poured on the cushion layer. Permanent brick walls and fine stone concrete are arranged on the outside of the structural side wall and on the cushion layer from bottom to top. The pouring layer and single-layer brickwork waterproof protective layer. The permanent brick wall and fine stone concrete pouring layer are also provided with a waterproof coating plaster layer on the inside facing the structural side wall. The cushion layer is provided with an underlying self-adhesive waterproofing board and fine stone concrete protection. layer, the bottom layer of self-adhesive waterproof board is fully paved on the cushion layer, and the upper edge reaches the waterproof coating surface layer of the fine stone concrete pouring layer, and the lateral self-adhesive waterproof board is paved on the inside of the single-layer brick waterproof protective layer. This application further improves the density and uniformity of the fine stone concrete pouring layer, the pressure weak points of the construction joints and the waterproof reinforcement layer of the paint, completely avoiding possible damage during backfilling and enhancing the waterproofing ability of the weak points.

Description

A kind of foundation pit structure molding waterproof construction structure

Technical field

This application relates to the field of construction, specifically a foundation pit structure molding waterproof construction structure.

Background technique

Leakage problems arise one after another in the underground sections of urban rail transit using the open-cut method, as well as in the basements of construction projects and underground pools in factory buildings. The water leakage problem is known as the number one stubborn problem in the industry. The leakage point of the construction joint between the slab and the side wall is particularly prominent. In addition to the technical reasons such as concrete pouring, the process defects such as smashing, puncture, burning, and pollution due to the folding protection of the process are not easy to cause, and it is also exposed to the sun and rain. In order to solve the above problems caused by aging and damage due to flooding, a waterproof construction structure of foundation pit structure molding was proposed.

Utility model content

The purpose of this utility model is to provide a foundation pit structure molding waterproof construction structure to solve the problem of leakage between the construction joints of the bottom plate and the side wall caused by aging damage, smashing, puncture, scorching and pollution of the waterproof board in the existing technology. The problem.

In order to achieve the above purpose, the present utility model adopts the following technical solutions:

Compared with the existing technology, this utility model has the following characteristics and beneficial effects:

A foundation pit structure molding waterproof construction structure, including a structural bottom plate and a structural side wall, which is characterized in that: the structural bottom plate is poured on the cushion layer, and permanent brick walls are provided on the outside of the structural side wall and on the cushion layer from bottom to top. , fine stone concrete pouring layer and single-layer brickwork waterproof protective layer. The permanent brick wall and fine stone concrete pouring layer are also provided with a waterproof paint plaster layer on the inner side of the structure side wall. The cushion layer is provided with a bottom self-propelled layer. Adhesive waterproof board and fine stone concrete protective layer. The bottom self-adhesive waterproof board is fully spread on the cushion layer and extends up to the waterproof coating plaster layer of the fine stone concrete pouring layer. The single-layer brick waterproof protective layer A lateral self-adhesive waterproofing board is paved on the inside. The lateral self-adhesive waterproofing board extends downward to the fine stone concrete pouring layer and overlaps with the bottom self-adhesive waterproofing board. The overlap is provided with paint waterproofing on the outside of the side wall of the structure. Reinforcement layer.

Further preferably, the waterproof reinforcing layer of the paint is coated on the outside of the fine stone concrete protective layer.

Furthermore, the inner corner where the cushion layer is connected to the permanent brick wall is provided with a chamfer. A waterproof reinforcement layer is laid on the chamfer and on the inside of the bottom self-adhesive waterproof board. The chamfer height is 50mm.

Further, the thickness of the fine stone concrete protective layer is 50mm, and the height of the fine stone concrete protective layer is 500~550mm.

Further, the horizontal bisector of the fine stone concrete pouring layer is higher than the longitudinal horizontal construction joint of the structural side wall.

In addition, the fine stone concrete pouring layer is a C15 or C20 fine stone concrete layer.

More preferably, the overlap width of the lateral self-adhesive waterproof board and the bottom self-adhesive waterproof board is greater than 100mm.

This application further improves the density and uniformity of the fine stone concrete pouring layer, the pressure weak points of the construction joints and the waterproof reinforcement layer of the paint, completely avoiding possible damage during backfilling and enhancing the waterproofing ability of the weak points.

Description of the drawings

Figure 1 is a schematic structural diagram of a waterproof construction structure for foundation pit structure molding in this application.

Detailed ways

In order to make the technical means, innovative features, objectives and effects achieved by the present utility model easy to understand, the present utility model will be further described below.

The embodiments described here are specific implementations of the present utility model. They are used to illustrate the concept of the present utility model and are illustrative and exemplary. They should not be construed as limiting the implementation of the present utility model and the scope of the present utility model. limit. In addition to the embodiments recorded here, those skilled in the art can also adopt other obvious technical solutions based on the content disclosed in the claims and the specification of this application. These technical solutions include the use of any obvious technical solutions to the embodiments recorded here. Technical solutions for replacement and modification.

A foundation pit structure molding waterproof construction structure, as shown in Figure 1, includes a structural bottom plate 1 and a structural side wall 2. The structural bottom plate 1 is poured on the cushion layer 14. The outside of the structural side wall 2 and the cushion layer 14 are formed from bottom to top. There is a permanent brick wall 3, a fine stone concrete pouring layer 4 and a single-layer brick waterproofing protective layer 5 in sequence. The permanent brick wall 3 and the fine stone concrete pouring layer 4 are also provided with a waterproof coating plaster on the inner side of the structure side wall 2. The surface layer 6 and the cushion layer 14 are provided with a bottom self-adhesive waterproofing board 7 and a fine stone concrete protective layer 8. The bottom self-adhesive waterproof board 7 is fully spread on the cushion layer 14 and extends up to the waterproof layer of the fine stone concrete pouring layer 4. On the paint plaster layer 6, a lateral self-adhesive waterproofing board 9 is paved on the inside of the single-layer brick waterproofing protective layer 5. The lateral self-adhesive waterproofing board 9 extends downward to the fine stone concrete pouring layer 4 and is self-adhesive and waterproof with the bottom layer. The boards 7 overlap each other. The overlap is close to the outside of the structural side wall 2 and is provided with a paint waterproof reinforcement layer 10. The paint waterproof reinforcement layer 10 is coated with the outside of the fine stone concrete protective layer 8. The cushion layer 14 is connected to the inner corner of the permanent brick wall 3. The location is provided with a chamfer 11. There is a waterproof reinforcing layer 12 on the chamfer 11 and on the inside of the bottom self-adhesive waterproof board 7. The chamfer 11 is 50mm high. The thickness of the fine stone concrete protective layer 8 is 50mm. The fine stone concrete protective layer 8 is high. 500~550mm, the horizontal bisector of the fine stone concrete pouring layer 4 is higher than the longitudinal horizontal construction joint 13 of the structural side wall 2, the fine stone concrete pouring layer 4 is a C15 or C20 fine stone concrete layer, and the lateral self-adhesive waterproof board 9. The overlap width with the bottom self-adhesive waterproof board 7 is greater than 100mm.

The construction steps for this application are as follows:

S1: Excavate the foundation pit to the base, inspect and confirm the drainage of the foundation pit, base treatment, geology and bearing capacity, plane position, size, elevation, etc., clear the bottom in time and pour cushion concrete;

S2: Partial pouring section brick membrane masonry and plastering, the specific steps are as follows:

S2.1: Brick membrane masonry in the divided pouring section. The height of the brick membrane masonry is slightly higher than the elevation of the floor and side wall construction joints. The masonry thickness is generally 24 walls. Autoclaved aerated blocks, which are easy to absorb water and are not allowed to be bulky, are not allowed. Brickwork materials with large shrinkage:

S2.2: The inner membrane of the brick membrane is plastered and the inner and outer corners are chamfered to prevent sharp objects from masonry bricks and mortar joints from damaging the waterproof layer, and to ensure a smooth transition when laying waterproof boards;

S3: The waterproof layer, the fine stone protective layer and the raft or bottom plate are poured. In order to prevent the side wall waterproof layer from slipping, being uneven and shifting during laying, it can be directly fixed with anchors on the top of the brick membrane;

S4: The construction of the superstructure continues. After pouring to a certain height or after the pouring is completed and the strength meets the requirements, the space between the brick membrane side wall and the foundation pit wall is backfilled in layers as required;

S5: Remove the brick membrane, weld the waterproof board, and pour concrete for sections and joints. The specific steps are as follows:

S5.1: Clean the debris on the top of the brick membrane, cut off the nailed part on the top of the brick membrane in parallel, and manually remove the top part of the brick membrane to expose the fresh, unaging waterproof layer;

S5.2: The exposed non-polluted and non-aging waterproof layer and the upper waterproof layer are connected and reinforced as designed, and the lower waterproof layer covers the upper waterproof layer and is inspected;

S5.3: After the overlapping of the waterproof layer is completed, pour the waterproof reinforced section with fine stone concrete and vibrate it tightly;

S6: Upper waterproof protective layer, backfill, structure and other processes.

In step S2.1, the specific steps are: the height of the brick membrane construction is at least 1 brick or 50mm higher than the elevation of the floor and side wall construction joints; the thickness of the mortar joints at the position of 6 bricks below the brick membrane construction height is shortened by half. And arranged in a staggered manner to facilitate manual dismantling.

In step S2.2, the specific steps are: In step S2.2, the specific steps are: use geotextile as an isolation layer for at least 6 bricks below the top of the inner wall of the brick membrane and remove the buffer protective layer.

In step S5.1, the specific steps are: remove the top bricks and membrane bricks to a thickness of 6 pieces, which is about 300mm, to ensure that the waterproof layer is ≥100mm when overlapped, and the width of the reinforcement layer below the construction joint is ≥500mm.

In step S5.2, the specific steps are: after the construction of the construction joint waterproof layer and waterproof reinforcement layer is completed, the surface layer is sprayed with a double-layer anti-seepage asphalt coating or 2mm thick Bolier liquid rubber spray material.

In step S5.3, the specific steps are: pour C15 or C20 fine stone concrete with a pouring height of at least 500mm, that is, 300mm below the construction joint and 250mm above the construction joint. The pouring thickness is ≥150mm, so that the waterproof reinforcement layer, waterproof layer, spray layer, Concrete is bonded into a whole.

1. The height of brick membrane masonry must be at least 1 brick or 50mm higher than the elevation of the floor and side wall construction joints, which can solve the problem of bolt fixation at the top of the waterproof layer. Currently, the main fixing measures for domestic waterproof board vaults and side walls include gasket heat. The two basic methods of fixing are the melting method and the cotton rope fixing at the back. Both of them have serious shortcomings in that they are easy to fall off. Secondly, a self-adhesive waterproof board is derived. The self-adhesive layer is first fixed with washers and studs, and then the waterproof layer is laid. , and also cause severe waste of waterproof boards. It is fixed by bolts on the top surface of the brick membrane, and is cut after ensuring the width of the overlap before overlapping. It is technically reliable and economically feasible.

2. In step S5.1, through the protection and removal of 6 pieces of brick membranes on the top, the aging problem caused by wind and sun and the puncture of the waterproof board by concrete, formwork, steel bars and welding during the construction of the superstructure can be solved , burns, burn through and other problems.

3. In step 5.2, after the waterproof boards are overlapped, the waterproofing effect of the key locations of the construction joints is further enhanced by uncovering the top brick membrane and spraying or brushing double layers of anti-seepage asphalt and Bolier liquid rubber.

4. In step 5.3, through the denseness and uniformity of the concrete, the pressure weak points of the construction joints and the waterproof reinforcement layer are further improved to completely avoid possible damage during backfilling and enhance the waterproof ability of the weak points.

The parts not involved in the present utility model are the same as the existing technology or can be implemented using the existing technology.

The basic principles and main features of the present utility model and the advantages of the present utility model have been shown and described above. For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and does not deviate from the present utility model. Without the spirit or basic characteristics of the invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is therefore intended that all claims falling within the rights All changes within the meaning and scope of the required equivalent elements are included in the present invention. Any reference signs in the claims shall not be construed as limiting the claim in question.

In addition, it should be understood that although this specification is described in terms of implementations, not each implementation only contains an independent technical solution. This description of the specification is only for the sake of clarity, and those skilled in the art should take the specification as a whole. , the technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

Claims (7)

1. A foundation pit structure molding waterproof construction structure, including a structural bottom plate (1) and a structural side wall (2), which is characterized in that: the structural bottom plate (1) is poured on the cushion (14), and the structural side wall (2) ), a permanent brick wall (3), a fine stone concrete pouring layer (4) and a single-layer brick waterproofing protective layer (5) are provided in sequence from bottom to top on the outside and on the cushion layer (14). The permanent brick wall (3) 3). The fine stone concrete pouring layer (4) is also provided with a waterproof paint plaster layer (6) on the inside facing the structural side wall (2), and the bottom layer of self-adhesive waterproofing board (7) is provided on the cushion layer (14). and fine stone concrete protective layer (8), the bottom self-adhesive waterproof board (7) is fully spread on the cushion layer (14), and is connected to the waterproof coating plaster layer (6) of the fine stone concrete pouring layer (4) ), a lateral self-adhesive waterproof board (9) is paved on the inside of the single-layer brick waterproof protective layer (5), and the lateral self-adhesive waterproof board (9) extends downward to the fine stone concrete pouring layer ( 4) and overlap with the bottom self-adhesive waterproof board (7), and a paint waterproof reinforcement layer (10) is provided on the outside of the overlap near the structural side wall (2). 2. A foundation pit structure molding waterproof construction structure according to claim 1, characterized in that: the waterproof reinforced layer of paint (10) is coated with the outside of the fine stone concrete protective layer (8). 3. A foundation pit structure molding waterproof construction structure according to claim 1, characterized in that: the inner corner where the cushion (14) is connected to the permanent brick wall (3) is provided with a chamfer (11) , a waterproof reinforcement layer (12) is paved on the inside of the chamfer (11) and the bottom self-adhesive waterproof board (7), and the chamfer (11) is 50mm high. 4. A foundation pit structure molding waterproof construction structure according to claim 1, characterized in that: the thickness of the fine stone concrete protective layer (8) is 50mm, and the fine stone concrete protective layer (8) is 500~550mm high . 5. A foundation pit structure molding waterproof construction structure according to claim 1, characterized in that: the horizontal bisector of the fine stone concrete pouring layer (4) is higher than the longitudinal direction of the structural side wall (2). Horizontal construction joints (13). 6. A foundation pit structure molding waterproof construction structure according to claim 1, characterized in that: the fine stone concrete pouring layer (4) is a C15 or C20 fine stone concrete layer. 7. A foundation pit structure molding waterproof construction structure according to any one of claims 1 to 6, characterized in that: the lateral self-adhesive waterproof board (9) is overlapped with the bottom self-adhesive waterproof board (7) The connection width is greater than 100mm.