Waterproof structure for high-low span floor slab part of basement and construction method of waterproof structure
By burying grouting pipes across the floor slabs in the basement and sealing the construction joints with polyurethane chemical grouting material, combined with the expansion and water stopping effect of the two-way water-expanding water stop strips, the problem of easy leakage in the construction joints is solved, and efficient waterproofing is achieved Effect.
Patent Information
- Application Number
- CN202411401750.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-09
- Publication Date
- 2024-12-20
AI Technical Summary
The high and low basement cross-slab parts cannot be constructed in parallel in synchronization during construction, resulting in leakage of construction joints and affecting the waterproof quality.
Grouting pipes are buried at high and low floor slabs, and after consolidation of the high and high-span bottom plate, polyurethane chemical grouting material is injected into sealing the construction joints through high pressure. Combined with the two water-expanded water stop strips, it expands into expanded water stop rubber after encountering water. , plays a role in stopping water.
It effectively avoids leakage problems at the construction joints and ensures the waterproofing effect of the high and low basement crossing floor slabs.
Smart Images
Figure CN119163076A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of building construction, and in particular to a waterproof structure for high and low span floor slabs of a basement and a construction method thereof. Background Art
[0002] During the construction phase of underground structures, underground building structures have the characteristics of large earthwork support and excavation works, complex underground structures, difficult backfill compaction, and are easily affected by underground hydrogeology. Due to the characteristics of the construction process, the high and low spans on both sides cannot be constructed synchronously and in parallel, resulting in construction joints in the high and low span beams and slabs, which seriously affects the quality of later waterproofing construction and is prone to leakage construction problems. Summary of the invention
[0003] In order to overcome the defects of the prior art, a waterproof structure for the high and low span floor slabs of a basement and a construction method thereof are provided to solve the problem of easy leakage of construction joints in the high and low span beam and slab parts of the underground structure that cannot be synchronously leveled.
[0004] In order to achieve the above object, a waterproof structure of a high-low span floor slab of a basement is provided, wherein a low-span floor slab cast first is cast on the inner side of the outer wall of the basement, and a high-span bottom slab cast later is cast on the outer side of the outer wall of the basement. The waterproof structure of the high-low span floor slab of the basement comprises:
[0005] A waterproofing coiled material is laid between the post-cast high-span bottom plate and the cushion layer, the waterproofing coiled material is turned down and laid on the outer side of the outer wall of the basement, and a protective layer is laid on the outer side of the waterproofing coiled material on the outer wall of the basement;
[0006] A grouting pipe is installed in the construction joint between the post-cast high-span bottom plate and the basement outer wall, and the grouting pipe is arranged along the length direction of the construction joint;
[0007] Two water-expandable waterstop strips are installed in the construction joint and are respectively arranged on opposite sides of the grouting pipe.
[0008] Furthermore, backfill soil is filled between the protective layer and the cushion layer.
[0009] Furthermore, the grouting pipe is arranged in the middle position of the construction joint.
[0010] The present invention provides a construction method for a waterproof structure of a high-low span floor slab portion of a basement, comprising the following steps:
[0011] Laying the waterproofing membrane on the outside of the basement exterior wall and laying it on the cushion layer after the cushion layer is poured;
[0012] A groove is provided on the outer side of the basement outer wall along the length direction of the basement outer wall, and a grouting pipe is installed in the groove;
[0013] Install two water-swellable waterstop strips on the outer side of the basement outer wall, and the two water-swellable waterstop strips are arranged on opposite sides of the groove;
[0014] Casting the high-span bottom plate on the waterproof membrane;
[0015] After the post-cast high-span bottom plate is solidified, grouting is performed through the grouting pipe to seal the construction joint between the post-cast high-span bottom plate and the outer wall of the basement.
[0016] Furthermore, before pouring the post-cast high-span base slab, a protective layer is poured on the waterproof membrane.
[0017] The beneficial effect of the present invention lies in that the waterproof structure of the high and low span floor parts of the basement of the present invention is achieved by burying a grouting pipe at the construction joint node of the low span floor slab poured first and the high span bottom slab poured later, and after the high span bottom slab is poured later, the construction joint is sealed by high-pressure injection of polyurethane chemical grouting material, and two water-swelling waterstop strips are further arranged on the upper and lower layers of the grouting pipe respectively. After the water-swelling waterstop strips absorb the immersed water, their own volume expands and becomes an expanding waterstop rubber, which can play a waterstop role when pouring concrete, thereby avoiding leakage at the construction joint. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:
[0019] Figure 1 It is a schematic structural diagram of the waterproof structure of the high and low span floor parts of the basement according to an embodiment of the present invention.
[0020] Figure 2 for Figure 1 Cross-sectional view at AA in . DETAILED DESCRIPTION
[0021] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It is also necessary to explain that, for ease of description, only the parts related to the invention are shown in the accompanying drawings.
[0022] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.
[0023] Reference Figure 1The inner side of the basement exterior wall 4 is cast with a first-cast low-span floor slab 5. The outer side of the basement exterior wall 4 is cast with a later-cast high-span bottom slab 6. The thickness of the first-cast low-span floor slab is less than the thickness of the later-cast high-span bottom slab. The upper surface of the first-cast low-span floor slab is matched to the elevation of the upper surface of the later-cast high-span bottom slab. The lower part of the later-cast high-span bottom slab is filled with backfill soil. Due to the complex underground structure, the backfill is difficult to compact and is easily affected by underground hydrogeology. On the other hand, due to the characteristics of the construction process, the high and low spans on both sides cannot be constructed synchronously and in parallel, resulting in construction joints in the high and low span beam and slab parts, which is prone to leakage.
[0024] Reference Figure 1 and Figure 2 As shown, the present invention provides a waterproof structure for high and low span floor slabs of a basement, which is used at the construction joint node between the low span floor slab poured first and the high span bottom slab poured later.
[0025] Specifically, the waterproof structure of the high and low span floor parts of the basement of the present invention includes: a waterproof coiled material 1, a grouting pipe 2, and a water-swellable water stop strip 3.
[0026] The waterproofing membrane 1 is placed between the post-cast high-span bottom plate 6 and the cushion layer 10. The waterproofing membrane 1 is turned down and laid on the outside of the basement outer wall 4. A protective layer is laid on the outside of the waterproofing membrane 1 on the basement outer wall 4.
[0027] As a preferred embodiment, backfill soil 7 is filled between the outer protective layer and the cushion layer of the basement outer wall 4.
[0028] The grouting pipe 2 is installed in the construction joint between the post-cast high span bottom plate 6 and the basement outer wall 4. The grouting pipe 2 is arranged along the length direction of the construction joint.
[0029] In this embodiment, the grouting pipe 2 is arranged in the middle position of the construction joint.
[0030] The number of the water-swellable waterstop strips 3 is two. The two water-swellable waterstop strips 3 are installed in the construction joint and are respectively arranged on the opposite sides of the grouting pipe 2.
[0031] The waterproof structure of the high and low span floor parts of the basement of the present invention is achieved by burying a grouting pipe at the construction joint node of the low span floor slab poured first and the high span bottom slab poured later, and after the high span bottom slab is poured later, the construction joint is sealed by high-pressure injection of polyurethane chemical grouting material, and two water-swelling waterstop strips are further arranged on the upper and lower layers of the grouting pipe respectively. After the water-swelling waterstop strips absorb the immersed water, their own volume expands and becomes an expanding waterstop rubber, which can play a waterstop role when pouring concrete, thereby avoiding leakage at the construction joint.
[0032] The present invention provides a construction method for a waterproof structure of a high-low span floor slab portion of a basement, comprising the following steps:
[0033] S1. Lay the waterproof membrane 1 on the outside of the basement outer wall 4, and lay it on the cushion layer after the cushion layer is poured.
[0034] S2. A groove is opened on the outer side of the basement outer wall 4 along the length direction of the basement outer wall 4, and the grouting pipe 2 is installed in the groove.
[0035] After grooving and before installing the grouting pipe, clean the construction joint on the outside of the basement exterior wall with a wire brush to ensure that the surface of the construction joint is solid and smooth.
[0036] A flexible grouting pipe is embedded in the construction joint. The grouting pipe is embedded in the construction joint. There are grooves around the outer periphery of the pipe wall. There are uniform holes on the groove wall. The groove is covered with elastic sealing strips. The outer side of the slurry outlet is covered with a foam rubber layer. The foam rubber layer and the frame are fixed with nylon mesh. The grouting pipe is fixed with a catheter clamp every 250mm to prevent abnormal shaking, sliding or bending deformation. The grouting pipe mouth is sealed with a plug to prevent blockage, and a grouting port top cover is reserved.
[0037] S3. Two water-swellable waterstop strips 3 are installed on the outer side of the basement outer wall 4. The two water-swellable waterstop strips 3 are arranged on opposite sides of the groove.
[0038] After pre-embedded grouting pipes, in order to ensure the waterproof effect of high and low span parts, the dust on the surface of the construction joint is cleaned, and a water-swelling waterstop strip is applied at the upper end of the construction joint of the high and low span parts 70mm away from the bottom plate. Since the water-swelling waterstop strip expands its volume after absorbing the water and becomes an expanding waterstop rubber, it can play a waterstop role when pouring concrete.
[0039] S4, pouring the high-span bottom plate 6 on the waterproof membrane 1.
[0040] Before pouring the high-span bottom plate 6 , a protective layer 8 is poured on the waterproof membrane 1 .
[0041] S5. After the post-cast high-span bottom plate 6 is solidified, grouting is performed through the grouting pipe 2 to seal the construction joint between the post-cast high-span bottom plate 6 and the basement outer wall 4.
[0042] After the main structure of the high and low span parts is completed, open the top cover of the grouting box, use the grouting port in the grouting box, screw the grouting nozzle into the grouting port, and grout all the pre-buried grouting pipes. After the grouting of the high and low span parts is completed, the grouting pressure is controlled at 0.3-0.5MPa, and the grouting uses polyurethane chemical grouting material.
[0043] When the grouting material no longer flows into the grouting pipe and the grouting pressure shows stability, the grouting pressure is maintained for 3 minutes and then the grouting port is blocked. The grouting reinforcement and sealing work of the high and low span parts is completed in sequence, and the leakage quality effect is checked in stages at a later stage.
[0044] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the present application.
Claims
1. A waterproof structure for high and low span floors in a basement, characterized in that: The inner side of the basement exterior wall is cast with a first cast low span floor slab, and the outer side of the basement exterior wall is cast with a later cast high span bottom slab. The waterproof structure of the high and low span floor slabs of the basement includes: A waterproofing coiled material is laid between the post-cast high-span bottom plate and the cushion layer, the waterproofing coiled material is turned down and laid on the outer side of the outer wall of the basement, and a protective layer is laid on the outer side of the waterproofing coiled material on the outer wall of the basement; A grouting pipe is installed in the construction joint between the post-cast high-span bottom plate and the basement outer wall, and the grouting pipe is arranged along the length direction of the construction joint; Two water-expandable waterstop strips are installed in the construction joint and are respectively arranged on opposite sides of the grouting pipe.
2. The waterproof structure for high and low span floors of a basement according to claim 1 is characterized in that: Backfill soil is filled between the protective layer and the cushion layer.
3. The waterproof structure for high and low spans of basement floors according to claim 1 is characterized in that: The grouting pipe is arranged at the middle position of the construction joint.
4. A construction method for a waterproof structure of a high-low span floor of a basement as claimed in any one of claims 1 to 3, characterized in that: The following steps are involved: Laying the waterproofing membrane on the outside of the basement exterior wall and laying it on the cushion layer after the cushion layer is poured; A groove is provided on the outer side of the basement outer wall along the length direction of the basement outer wall, and a grouting pipe is installed in the groove; Install two water-swellable waterstop strips on the outer side of the basement outer wall, and the two water-swellable waterstop strips are arranged on opposite sides of the groove; Casting the high-span bottom plate on the waterproof membrane; After the post-cast high-span bottom plate is solidified, grouting is performed through the grouting pipe to seal the construction joint between the post-cast high-span bottom plate and the outer wall of the basement.
5. The construction method according to claim 4, characterized in that: Before pouring the post-cast high-span bottom slab, a protective layer is poured on the waterproof membrane.