Post-cast strip pre-paving anti-sticking waterproof structure

Abstract

The utility model discloses a post-cast strip pre-paving anti-sticking waterproof structure which comprises two cast-in-place concrete structures, a post-cast strip is reserved between the two cast-in-place concrete structures, an expansive concrete structure is poured in the post-cast strip, a pre-paving anti-sticking waterproof coiled material and a reinforcing layer coiled material are sequentially paved below the post-cast strip from top to bottom, and the pre-paving anti-sticking waterproof coiled material and the reinforcing layer coiled material are arranged on the post-cast strip. The laying width of the reinforcing layer coiled material is larger than the width of the post-cast strip, the pre-laid anti-sticking waterproof coiled material is laid below the cast-in-place concrete structure and the expansive concrete structure, the laying width of the pre-laid anti-sticking waterproof coiled material is larger than the width of the reinforcing layer coiled material, and a steel plate water stop belt is embedded in the side face of the cast-in-place concrete structure. Compared with the prior art, a coiled material composite paving technology is adopted, a waterproof structure at the position of the post-cast strip is strengthened, the problems of waterproof failure and the like caused by long-term exposure and damage of a pre-paved and anti-sticking waterproof coiled material of the post-cast strip are solved, the concrete plate and the waterproof coiled material are more tightly attached, the possibility of water seepage of the raft plate is reduced, and the service life of the raft plate is prolonged. And the maintenance cost and the maintenance frequency are reduced.

Description

Technical Field

[0001] The utility model relates to the field of engineering construction, in particular to a post-casting belt pre-laid reverse-adhesive waterproof structure. Background Art

[0002] Pre-laid reverse-adhesive waterproofing membrane is a single-layer waterproofing construction technology. Concrete is poured directly on the membrane, and the cement paste of the concrete and the adhesive layer of the membrane are interlocked to form a complete and continuous bond. This single-layer waterproofing structure is prone to long-term soaking of the membrane during the construction of the post-casting strip, affecting the waterproofing effect, and the falling of the concrete blocks will damage the membrane.

[0003] Among them, the post-cast strip is a concrete strip left at the corresponding position of the foundation slab, wall, and beam in accordance with the design or construction specifications to prevent harmful cracks that may occur in the cast-in-place reinforced concrete structure due to uneven shrinkage or settlement. Since the post-cast strip is cast after molding, the junction between it and the previously poured concrete is the weak link in the waterproof construction. The post-cast strip is exposed for a long time and causes damage. How to strengthen the waterproof treatment of the post-cast strip is the key to the construction of pre-laid anti-adhesive waterproof membrane. Utility Model Content

[0004] The purpose of the utility model is to provide a pre-laid reverse-adhesive waterproof structure in a post-cast strip, through the composite paving technology of roll materials, and use of a waterstop to strengthen the waterproofing at the post-cast strip, thereby solving the problem of pre-laid reverse-adhesive waterproof roll materials being damaged due to long-term exposure at the post-cast strip position, and can effectively improve the overall waterproof effect of the roll materials.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a post-cast strip pre-laid anti-adhesive waterproof structure, comprising two cast-in-place concrete structures, a post-cast strip is left between the two cast-in-place concrete structures, an expansive concrete structure is cast in the post-cast strip, and pre-laid anti-adhesive waterproof membrane and reinforcement layer membrane are laid in sequence from top to bottom under the post-cast strip, the laying width of the reinforcement layer membrane is greater than the width of the post-cast strip, the pre-laid anti-adhesive waterproof membrane is laid under the cast-in-place concrete structure and the expansive concrete structure, and the laying width is greater than the width of the reinforcement layer membrane, a steel plate waterstop is pre-embedded on the side of the cast-in-place concrete structure, and the steel plate waterstop is horizontally laid at the connecting seam between the cast-in-place concrete structure and the expansive concrete structure.

[0006] Preferably, the left and right sides of the steel plate waterstop are folded downward to form a waterproof curling edge.

[0007] Preferably, the laying width of the reinforcement layer coil on both sides is greater than 300 mm of the post-casting zone.

[0008] Preferably, the pre-laid reverse-adhesive waterproofing membrane and the reinforcement layer membrane are polymer self-adhesive membrane waterproofing membranes.

[0009] Preferably, the thickness of the polymer self-adhesive waterproof membrane is 1.5 mm.

[0010] Compared with the prior art, the utility model has the following advantages: the utility model adopts the composite paving technology of coiled materials, strengthens the waterproof structure at the post-casting belt, avoids the waterproof failure caused by the long-term exposure and damage of the pre-paved reverse-adhesive waterproof coiled materials at the post-casting belt, makes the concrete slab and the waterproof coiled materials fit more closely, reduces the possibility of water seepage on the raft slab, and reduces the maintenance cost and repair frequency. The technology is suitable for waterproof engineering construction with strict waterproof requirements such as underground water purification plants. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0012] In the figure: 1. Cast-in-place concrete structure; 2. Expansive concrete structure; 3. Pre-laid reverse-adhesive waterproofing membrane; 4. Strengthening layer membrane; 5. Steel plate waterstop. DETAILED DESCRIPTION

[0013] The utility model will be further described below.

[0014] Embodiment: A post-cast belt pre-paved reverse adhesive waterproof structure, see Figure 1 , comprising two cast-in-place concrete structures 1, namely, blocks ① and ③, a post-cast strip is left between the two cast-in-place concrete structures 1, an expansive concrete structure 2, namely, block ②, is cast in the post-cast strip, and pre-laid reverse-adhesive waterproofing membrane 3 and a strengthening layer membrane 4 are laid in sequence from top to bottom under the post-cast strip, and a membrane composite paving technology is adopted, the laying width of the strengthening layer membrane 4 is greater than the width of the post-cast strip, the pre-laid reverse-adhesive waterproofing membrane 3 is laid under the cast-in-place concrete structure 1 and the expansive concrete structure 2, and the laying width is greater than the width of the strengthening layer membrane 4, a steel plate waterstop 5 is pre-buried on the side of the cast-in-place concrete structure 1, and the steel plate waterstop 5 is horizontally laid at the connection seam between the cast-in-place concrete structure 1 and the expansive concrete structure 2, so as to strengthen the waterproof structure at the post-cast strip, avoid the problems of waterproof failure caused by long-term exposure and damage of the pre-laid reverse-adhesive waterproofing membrane 3 of the post-cast strip, make the concrete slab and the waterproofing membrane fit more closely, reduce the possibility of water seepage of the raft slab, and reduce the maintenance cost and repair frequency.

[0015] The steel plate waterstop 5 is embedded in the cast-in-place concrete before pouring the post-cast joint, which avoids the long-term exposure of the pre-laid anti-adhesive waterproof membrane 3 in the post-cast joint. The left and right sides of the steel plate waterstop 5 are folded downward to form a waterproof curling edge. The waterproof curling edge structure can prevent water from overflowing from both sides, further improve the waterproof effect, and at the same time improve the structural connection strength between the expansive concrete structure 2 and the cast-in-place concrete structure 1.

[0016] Through practice, the laying width of the reinforcement layer roll 4 on both sides is greater than 300mm of the post-cast strip. Even if the pre-laid reverse-adhesive waterproof roll 3 at the connecting seam is damaged, the pre-laid reverse-adhesive waterproof roll 3 and the reinforcement layer roll 4 can still fit tightly together, and water vapor will not leak from the fitting surface.

[0017] The pre-laid reverse-adhesive waterproofing membrane 3 and the strengthening layer membrane 4 are made of polymer self-adhesive waterproof membrane. The thickness of the polymer self-adhesive waterproof membrane is 1.5 mm, the waterproofing effect is good, and each surface can be tightly fitted.

[0018] Specific construction method:

[0019] 1. Lay the polymer self-adhesive film waterproof reinforcement layer roll 4 under block ②. The reinforcement layer roll 4 is directly bonded to the cushion layer, and extends into blocks ① and ③ by 300mm on both sides;

[0020] 2. Lay the polymer pre-laid reverse-adhesive waterproofing membrane 3 as a whole under the blocks ①, ②, and ③, press the reinforcement layer membrane 4, and control the overlap of the pre-laid reverse-adhesive waterproofing membrane 3 and the edge of the reinforcement layer membrane 4 to be staggered;

[0021] 3. Tie up the steel bars of blocks ①, ② and ③, and fix the closing net at the junction of blocks ①, ② and ③, ②;

[0022] 4. Fix the horizontal steel plate waterstop 5 on both sides of block ②, with the notch of the steel plate waterstop 5 facing the water surface.

[0023] 5. Concrete is poured in blocks ① and ③ first. After 28 days of concrete pouring on both sides, concrete is poured in block ②. Expansive concrete is used for block ②, and its strength grade is one level higher than that of blocks ① and ③.

[0024] 6. After the concrete pouring of the post-cast zone is completed, a complete waterproof system is formed. Even if the pre-laid reverse-adhesive waterproof membrane 3 is damaged, the reinforcement layer membrane 4 still has the waterproof function to prevent water seepage.

[0025] The above is a detailed introduction to the post-cast strip pre-laid anti-adhesive waterproof structure provided by the utility model. Specific examples are used in this article to illustrate the principle and implementation method of the utility model. The description of the above embodiments is only used to help understand the method and core idea of ​​the utility model; at the same time, for general technical personnel in this field, according to the idea of ​​the utility model, there will be changes in the specific implementation method and application scope, and changes and improvements to the utility model will be possible without exceeding the concept and scope specified in the attached claims. In summary, the content of this specification should not be understood as a limitation on the utility model.

Claims

1. A post-cast strip pre-paved reverse-adhesive waterproof structure, comprising two cast-in-place concrete structures, a post-cast strip is left between the two cast-in-place concrete structures, and an expansive concrete structure is cast in the post-cast strip, characterized in that: Pre-laid reverse-adhesive waterproofing membrane and reinforcement layer membrane are laid in sequence from top to bottom under the post-cast strip, the laying width of the reinforcement layer membrane is greater than the width of the post-cast strip, the pre-laid reverse-adhesive waterproofing membrane is laid under the cast-in-place concrete structure and the expansive concrete structure, and the laying width is greater than the width of the reinforcement layer membrane, a steel plate waterstop is pre-embedded on the side of the cast-in-place concrete structure, and the steel plate waterstop is horizontally laid at the connecting joint between the cast-in-place concrete structure and the expansive concrete structure.

2. The post-cast strip pre-laid reverse-adhesive waterproof structure according to claim 1 is characterized in that: The left and right sides of the steel plate water stop are folded downward to form a waterproof curling edge.

3. The post-cast strip pre-paved reverse-adhesive waterproof structure according to claim 1 is characterized in that: The laying width of the reinforcement layer coil on both sides is greater than 300mm of the post-casting zone.

4. The post-cast strip pre-paved reverse-adhesive waterproof structure according to claim 1 is characterized in that: The pre-laid reverse-adhesive waterproofing roll and the reinforcement layer roll are polymer self-adhesive waterproofing rolls.

5. The post-cast strip pre-laid reverse-adhesive waterproof structure according to claim 4 is characterized in that: The thickness of the polymer self-adhesive waterproof membrane is 1.5 mm.

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