Post-cast anti-seepage retaining wall structure for air shaft adjacent to foundation pit and construction method thereof

Abstract

The application discloses a post-pouring anti-seepage retaining wall structure for a wind well adjacent to a foundation pit and a construction method thereof, and relates to the technical field of retaining wall structures. The post-pouring anti-seepage retaining wall structure comprises a post-pouring retaining wall, the post-pouring retaining wall is arranged at an angle with an existing retaining wall, a gap is formed between the post-pouring retaining wall and the existing retaining wall, and an overhanging plate is formed on the outer side of the existing retaining wall by pouring. Two oppositely arranged supporting wall piers are poured on the overhanging plate, one supporting wall pier is connected to the outer side of the existing retaining wall, the other supporting wall pier is connected to the outer side of the post-pouring retaining wall, and a water stop belt is arranged in the gap between the two supporting wall piers. A waterproof coiled material is wrapped on the post-pouring retaining wall, the overhanging plate and the two supporting wall piers. A protective plate is laid on the outer side of the waterproof coiled material. The application solves the problem that a water stop belt cannot be poured or installed between a post-pouring retaining wall and an existing retaining wall, thereby reducing the risk of seepage.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building construction, in particular to a post-poured anti-seep retaining wall structure for a wind well adjacent to a foundation pit and a construction method thereof. BACKGROUND

[0002] In the construction process of the retaining wall of the building structure, it is currently usually constructed by pouring once, but in some positions, due to design changes and design defects, etc., it is necessary to supplement pouring in the later period. When the retaining wall is supplemented and poured, the existing retaining wall cannot be poured or installed in some special positions between the post-poured retaining wall and the existing retaining wall, resulting in high risk of leakage. SUMMARY

[0003] In order to overcome the defects of the prior art, the present application provides a post-poured anti-seep retaining wall structure for a wind well adjacent to a foundation pit and a construction method thereof, to solve the problem of high risk of leakage between the post-poured retaining wall and the existing retaining wall due to the inability to pour or install a water stop belt.

[0004] To achieve the above-mentioned purpose, a post-poured anti-seep retaining wall structure for a wind well adjacent to a foundation pit is provided, comprising:

[0005] The post-poured retaining wall is arranged at an angle with the existing retaining wall, and a gap is formed between the post-poured retaining wall and the existing retaining wall. The outer side of the existing retaining wall is poured to form a cantilevered plate;

[0006] Two oppositely arranged supporting wall piers are poured on the cantilevered plate. One supporting wall pier is connected to the outer side of the existing retaining wall, and the other supporting wall pier is connected to the outer side of the post-poured retaining wall. A water stop belt is installed in the gap between the two supporting wall piers;

[0007] A waterproof coiled material is wrapped around the post-poured retaining wall, the cantilevered plate and the two supporting wall piers;

[0008] A protective plate is laid on the outer side of the waterproof coiled material.

[0009] Further, the cantilevered plate and the one supporting wall pier are respectively connected to the existing retaining wall by means of anchoring, and the other supporting wall pier is connected to the post-poured retaining wall by means of anchoring.

[0010] Further, the protective plate is an extruded polystyrene board.

[0011] Further, the water stop belt is a rubber water stop belt.

[0012] Further, the width of the gap is 20mm.

[0013] The present application provides a construction method of a post-poured anti-seep retaining wall structure for a wind well adjacent to a foundation pit, comprising the following steps:

[0014] pouring a cantilevered slab outside the existing retaining wall;

[0015] pouring a post-poured retaining wall, which is arranged at an angle with the existing retaining wall, and a gap is formed between the post-poured retaining wall and the existing retaining wall;

[0016] pouring two supporting buttresses on the cantilevered slab, one of which is connected to the outside of the existing retaining wall, and the other of which is connected to the outside of the post-poured retaining wall, and a waterstop is installed in the gap between the two supporting buttresses;

[0017] covering the post-poured retaining wall, the cantilevered slab and the two supporting buttresses with a waterproof roll material;

[0018] laying a protective plate outside the waterproof roll material.

[0019] The post-poured anti-seepage retaining wall structure for a wind shaft adjacent to a foundation pit according to the present application is suitable for a case where the main structure construction is completed, and a part of the retaining wall is constructed after the anti-seepage retaining wall structure. The structure not only meets the condition of a reserved gap between the retaining wall and the main structure, but also meets the waterproof requirement of the construction joint position. The structure mainly comprises a cantilevered slab, a supporting buttress, a retaining wall, a waterstop and an outer waterproof roll material. When the structure is implemented, the original structure does not need to be dismantled and modified, and only needs to be reinforced and modified on the original structure to realize the anti-seepage and retaining effects of the structure. BRIEF DESCRIPTION OF DRAWINGS

[0020] Other features, objects and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments, made with reference to the following drawings:

[0021] Figure 1 A structural schematic view of the post-poured anti-seepage retaining wall structure for a wind shaft adjacent to a foundation pit according to an embodiment of the present application.

[0022] Figure 2 A top view of the post-poured anti-seepage retaining wall structure for a wind shaft adjacent to a foundation pit according to an embodiment of the present application.

[0023] Figure 3 A structural schematic view of a cantilevered slab according to an embodiment of the present application.

[0024] Figure 4 A reinforcing bar planting schematic view of a supporting buttress according to an embodiment of the present application. DETAILED DESCRIPTION

[0025] The application will be described in further detail below with reference to the drawings and embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not intended to limit the application. In addition, it should be noted that only parts related to the application are shown in the drawings for ease of description.

[0026] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and embodiments.

[0027] Referring to Figures 1 to 4 The present application provides a post-cast anti-seep retaining wall structure for a wind shaft adjacent to a foundation pit, comprising: a post-cast retaining wall 1, a support wall pier 2, a waterproof roll material, and a protective plate 3.

[0028] In the present embodiment, one end of the retaining wall is connected to a frame structure column. The other end of the post-cast retaining wall is arranged opposite to the one end of the retaining wall. The post-cast retaining wall 1 is arranged at an angle to the retaining wall 4. A gap is formed between the post-cast retaining wall 1 and the retaining wall 4. A reinforced wall pier is arranged at the corner of the post-cast retaining wall.

[0029] In the present embodiment, the width of the gap is 20 mm.

[0030] The inner side of the post-cast retaining wall is used for setting the wind shaft. The outer side of the retaining wall 4 is cast to form an overhanging plate 11.

[0031] The top elevation of the overhanging plate is lower than the bottom elevation of the post-cast retaining wall.

[0032] The number of support wall piers 2 is two. The two support wall piers are arranged opposite to each other. The support wall piers 2 are cast on the overhanging plate 11. One of the support wall piers 2 is connected to the outer side of the retaining wall 4. The other support wall pier 2 is connected to the outer side of the post-cast retaining wall 1. A water stop belt 21 is installed in the gap between the two support wall piers 2.

[0033] As a preferred embodiment, referring to Figure 4 The overhanging plate 11 and one of the support wall piers 2 are connected to the retaining wall 4 by means of embedded steel bars. The other support wall pier 2 is connected to the post-cast retaining wall 1 by means of embedded steel bars.

[0034] As a preferred embodiment, the water stop belt 21 is a rubber water stop belt. Specifically, the rubber water stop belt is a middle-buried rubber water stop belt.

[0035] In the present embodiment, the gap is arranged vertically. The rubber water stop belt is arranged along the length direction of the gap. The opposite ends of the rubber water stop belt are arranged in the two support wall piers respectively. The bottom of the rubber water stop belt should extend into the overhanging plate by 5 cm, which needs to be fixed when casting the overhanging plate.

[0036] The opposite sides of the rubber waterstop are fixed at the position between the two buttresses when the buttresses are supported and molded, and then the concrete is poured.

[0037] The waterproof roll is wrapped on the post-poured retaining wall 1, the cantilevered plate 11 and the two supporting buttresses 2.

[0038] The protective plate 3 is laid on the outer side of the waterproof roll.

[0039] As a preferred embodiment, the protective plate 3 is an extruded polystyrene board.

[0040] The application provides a construction method of a post-poured anti-seepage retaining wall structure of a wind shaft adjacent to a foundation pit, comprising the following steps:

[0041] S1, pouring to form a cantilevered plate 11 on the outer side of the existing retaining wall 4.

[0042] S2, pouring a post-poured retaining wall 1, the post-poured retaining wall 1 is arranged at an angle with the existing retaining wall 4, and a gap is formed between the post-poured retaining wall 1 and the existing retaining wall 4.

[0043] S3, supporting buttresses 2 are poured on the cantilevered plate 11 to form two supporting buttresses 2 arranged oppositely, one supporting buttress 2 is connected to the outer side of the existing retaining wall 4, and the other supporting buttress 2 is connected to the outer side of the post-poured retaining wall 1, and a waterstop 21 is installed in the gap between the two supporting buttresses 2.

[0044] S4, wrapping a waterproof roll on the post-poured retaining wall 1, the cantilevered plate 11 and the two supporting buttresses 2.

[0045] S5, laying a protective plate 3 on the outer side of the waterproof roll.

[0046] In the embodiment, first, drill holes to plant the reinforcement of the cantilevered plate and the reinforced buttress, the depth of the planted reinforcement of the cantilevered plate is 250mm, and the depth of the planted reinforcement of the reinforced buttress is 360mm. Bind the reinforcement of the cantilevered plate, the buttress and the reinforced buttress, and pay attention to the vertical main reinforcement of the supporting buttress on the cantilevered plate, complete the horizontal planting and binding of the supporting buttress, and the depth of the horizontal planting of the supporting buttress is 200mm. Support the formwork from bottom to top, and pay attention to the formwork support of the construction joint and the waterstop position. After the formwork support is completed, pour the concrete. After pouring, remove the formwork after 5 days, then perform the wall surface leveling treatment, and lay the waterproof roll. After the waterproof construction is completed, lay the thermal extruded plate outside the waterproof roll. After the concrete strength reaches the design strength, complete the backfilling of the foundation pit.

[0047] The thickness of the cantilevered plate is 200mm, the reinforcement needs to be planted on the existing retaining wall, the planting depth is 250mm, the plate is two-way double-layer C10@150, and the vertical reinforcement of the buttress is preset, which mainly bears the vertical load of the buttress and the waterproof of the bottom.

[0048] The supporting wall pile is rooted in the bottom overhanging plate, and mainly functions to prevent water belt and plays a vertical waterproof role. A 20mm gap is required between the post-cast retaining wall and the existing retaining wall to block the horizontal force transmission of the post-cast retaining wall.

[0049] The post-cast anti-seepage retaining wall structure for the air shaft adjacent to the foundation pit of the application is provided with an overhanging plate and a supporting wall pile at the joint of the post-cast retaining wall and the existing retaining wall, and a rubber waterstop is arranged between the two supporting wall piles, so that a sealing structure is formed by the overhanging plate, the wall pile and the rubber waterstop, and the whole is wrapped with a waterproof coiled material outside to form an anti-seepage retaining structure.

[0050] The post-cast anti-seepage retaining wall structure for the air shaft adjacent to the foundation pit of the application is suitable for the construction of the anti-seepage retaining wall structure after the completion of the main structure construction. The structure not only meets the condition of the gap between the retaining wall and the main body, but also meets the waterproof requirement of the construction joint position. The structure is mainly composed of an overhanging plate, a supporting wall pile, a retaining wall, a waterstop and an outer waterproof coiled material. When the structure is implemented, the original structure does not need to be dismantled and improved, and only needs to be planted and improved on the original structure to realize the anti-seepage and retaining effect of the structure.

[0051] The above description is only the preferred embodiment of the application and the explanation of the applied technical principles. It should be understood by those skilled in the art that the scope of the application involved in the application is not limited to the technical solutions formed by the specific combination of the above technical features, and also covers other technical solutions formed by the combination of the above technical features or equivalent features without departing from the inventive concept. For example, the above features are replaced with the technical features disclosed in the application (but not limited to) having similar functions to form a technical solution.

Claims

1. A post-cast impervious retaining wall structure for a wind shaft adjacent to a foundation pit, characterized by, The application relates to a method for constructing a new retaining wall. The application comprises: a post-cast retaining wall, which is arranged at an angle with an existing retaining wall, and forms a gap with the existing retaining wall, and a cantilever plate is formed on the outside of the existing retaining wall; two oppositely arranged supporting wall piers, which are cast on the cantilever plate, one supporting wall pier is connected to the outside of the existing retaining wall, and the other supporting wall pier is connected to the outside of the post-cast retaining wall, and a water stop belt is installed in the gap between the two supporting wall piers; a waterproof roll, which is wrapped on the post-cast retaining wall, the cantilever plate and the two supporting wall piers; a protective plate, which is laid on the outside of the waterproof roll; the water stop belt is a rubber water stop belt; the cantilever plate and the one supporting wall pier are connected to the existing retaining wall through anchoring, and the other supporting wall pier is connected to the post-cast retaining wall through anchoring; 2. The post-cast impervious retaining wall structure for a wind shaft adjacent to a foundation pit according to claim 1, characterized in that, the gap is vertically arranged, the rubber water stop belt is arranged along the length direction of the gap, the opposite ends of the rubber water stop belt are arranged in the two supporting wall piers respectively, and the bottom of the rubber water stop belt should be extended into the cantilever plate by 5 cm, and the cantilever plate needs to be fixed during casting.

3. The post-cast impervious retaining wall structure for a wind shaft adjacent to a foundation pit according to claim 1, characterized in that, The protective plate is an extruded polystyrene board.

4. A construction method of a post-cast impervious retaining wall structure for a wind shaft of a contiguous foundation, according to any one of claims 1 to 3, characterized in that, The width of the gap is 20 mm. The application comprises the following steps: casting a cantilever plate on the outside of the existing retaining wall; casting a post-cast retaining wall, which is arranged at an angle with the existing retaining wall, and forms a gap with the existing retaining wall; casting two oppositely arranged supporting wall piers on the cantilever plate, and connecting one supporting wall pier to the outside of the existing retaining wall, and connecting the other supporting wall pier to the outside of the post-cast retaining wall, and installing a water stop belt in the gap between the two supporting wall piers; wrapping a waterproof roll on the post-cast retaining wall, the cantilever plate and the two supporting wall piers; laying a protective plate on the outside of the waterproof roll.

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