Efficient water blocking and draining underground structure for deep foundation pit engineering

Abstract

The utility model discloses a deep foundation pit engineering efficient water blocking and draining underground structure which comprises an underground diaphragm wall, a concrete lining wall is poured on the inner side of the underground diaphragm wall, and a bottom plate and a floor slab are poured on the inner side of the concrete lining wall. The concrete reverse ridge, the bottom plate and the floor slab are integrally poured to form the concrete reverse ridge, post-pouring concrete is filled between the concrete reverse ridge and the concrete lining wall, a water collecting ditch is formed in the top of the post-pouring concrete, the upper water collecting ditch is connected to the lower water collecting ditch through a vertical drainage pipe, and a connecting pipeline is pre-buried in the concrete reverse ridge. The bottom-layer water collecting ditch pipeline is connected to one end of the connecting pipeline, and the other end of the connecting pipeline communicates with the water collecting well through the transverse drainage pipe. The masonry inner wall is built on the concrete reverse ridge, and a water-proof cavity is formed between the masonry inner wall and the concrete lining wall. The utility model solves the problem that the existing geological building underground structure with rich underground water sources is easy to leak.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction, in particular to a high-efficiency drainage underground structure for deep foundation pit engineering. Background Art

[0002] In densely populated urban areas, a large number of underground projects, including underground garages, underground shopping malls, subways, underground transportation hubs, and civil air defense facilities, are being built. Consequently, foundation pits are ubiquitous. In densely populated urban areas, foundation pits are often located close to rivers or in locations with abundant groundwater. Existing underground structures are prone to leakage, potentially posing a threat to structural safety.

[0003] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. Utility Model Content

[0004] In order to overcome the defects of the existing technology, a high-efficiency drainage underground structure for deep foundation pit engineering is now provided to solve the problem of easy leakage of existing underground structures of buildings in geology with rich groundwater sources.

[0005] To achieve the above purpose, a high-efficiency drainage underground structure for deep foundation pit engineering is provided, comprising:

[0006] A ground-connected wall, wherein a concrete lining wall is cast on the inner side of the ground-connected wall, and a bottom plate and a floor plate are cast on the inner side of the concrete lining wall;

[0007] A concrete counter-ridge is formed by integrally casting the bottom plate and the floor slab. Post-cast concrete is filled between the concrete counter-ridge and the concrete lining wall. A water collection ditch is formed on the top of the post-cast concrete. The upper water collection ditch is connected to the lower water collection ditch through a vertical drainage pipe. A connecting pipe is pre-buried in the concrete counter-ridge. The bottom water collection ditch pipeline is connected to one end of the connecting pipe. The other end of the connecting pipe is connected to the water collection well through a horizontal drainage pipe.

[0008] The masonry inner wall is built on the concrete counter-ridge, and a water-proof cavity is formed between the masonry inner wall and the concrete lining wall.

[0009] Furthermore, the post-cast concrete is plain concrete.

[0010] Furthermore, the connecting pipe is a PVC pipe.

[0011] Furthermore, a plurality of floor drains are provided in the bottom water collecting ditch, and the floor drains are connected to one end of the connecting pipe through a pipeline.

[0012] Furthermore, an inspection door is provided on the inner wall of the masonry, and the position of the inspection door corresponds to the position of the floor drain.

[0013] The beneficial effect of the present invention is that the high-efficiency water-blocking underground structure for deep foundation pit engineering of the present invention can effectively prevent external water from penetrating into the interior of the basement, keeping the basement space dry. This is crucial for the use of the basement as a storage room, garage or living space. The anti-seepage measures of the high-efficiency water-blocking underground structure for deep foundation pit engineering of the present invention can reduce the risk of equipment getting damp, and ensure the normal operation and service life of the electrical equipment and mechanical equipment in the basement. The anti-seepage design of the high-efficiency water-blocking underground structure for deep foundation pit engineering of the present invention can reduce the maintenance and renovation costs caused by basement leakage problems, help reduce the maintenance cost of buildings, and improve economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Other features, objects and advantages of the present application will become more apparent upon reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0015] Figure 1 This is a structural schematic diagram of a high-efficiency drainage underground structure for deep foundation pit engineering according to an embodiment of the utility model. DETAILED DESCRIPTION

[0016] The present application will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the relevant utility model and are not intended to limit the utility model. It should also be noted that, for ease of description, only the portions relevant to the utility model are shown in the accompanying drawings.

[0017] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this 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.

[0018] Reference Figure 1 As shown, the utility model provides a high-efficiency drainage underground structure for deep foundation pit engineering, comprising: a ground-connected wall 1, a concrete anti-ridge 2 and a masonry inner wall 3.

[0019] The inner side of the ground-connected wall 1 is cast with a concrete lining wall 11. The inner side of the concrete lining wall 11 is cast to form a bottom plate 4 and a floor plate 5.

[0020] Concrete counter-slope 2 is located inside the concrete lining wall and spaced apart from it. The base plate 4 and floor slab 5 are cast integrally to form the concrete counter-slope 2. Post-cast concrete 21 is filled between the concrete counter-slope 2 and the concrete lining wall 11. A water collection ditch is formed at the top of the post-cast concrete 21.

[0021] In this embodiment, the post-cast concrete 21 is plain concrete.

[0022] The upper water collecting ditch is connected to the lower water collecting ditch through a vertical drainage pipe 23. A connecting pipe 22 is pre-buried in the concrete anti-slope 2.

[0023] As a preferred embodiment, the connecting pipe 22 is a PVC pipe.

[0024] The bottom water collection ditch pipeline is connected to one end of the connecting pipe 22. The other end of the connecting pipe 22 is communicated with the water collection well through a horizontal drain pipe.

[0025] In this embodiment, a plurality of floor drains are provided in the bottom water collecting ditch, and the floor drains are connected to one end of the connecting pipe 22 through a pipeline.

[0026] As a preferred embodiment, the masonry inner wall 3 is provided with an inspection door, the position of which corresponds to the position of the floor drain.

[0027] The masonry inner wall 3 is built on the concrete counter-ridge 2. A water-proof cavity is formed between the masonry inner wall 3 and the concrete lining wall 11.

[0028] The construction process of the high-efficiency water-blocking underground structure for deep foundation pit projects of the present invention is as follows: construction of retaining structure, earth excavation, construction of basement structure (including water collection well), pre-buried longitudinal drainage floor drain, brushing waterproof layer on retaining structure, construction of cast-in-place concrete lining wall, construction of 200-width drainage ditch (water-proof cavity), cast-in-place concrete counter-slope (pre-buried horizontal water pipe), construction of masonry inner wall, reserved inspection door opening, pre-buried water hole in concrete counter-slope of other internal walls of the basement, and connection of horizontal drainage pipe to water collection well (the number of water collection wells is set according to the peak water flow rate of the basement calculated by design).

[0029] Specific construction plan:

[0030] 1. Construction and treatment of retaining structure, earth excavation and supporting structure:

[0031] 1) Carry out enclosure structure construction according to the construction drawings, and carry out soil excavation and support structure construction after the enclosure structure strength reaches the standard.

[0032] 2. Repair of leakage of basement floor and enclosure structure:

[0033] 1) After the excavation reaches the elevation required by the drawings, the basement floor construction shall be carried out;

[0034] 2) After the base plate construction is completed, preliminary leakage treatment of the enclosure structure shall be carried out (including grouting and sealing, application of waterproof layer, etc.).

[0035] 3. Construction treatment of basement concrete lining wall:

[0036] 1) The concrete lining wall is constructed simultaneously with the basement structure. Before the construction of the concrete lining wall, the waterproof layer of the ground-connected wall needs to be reinforced;

[0037] 2) Then continue the construction of other basement structures.

[0038] 4. Construction treatment of masonry inner wall:

[0039] 1) The drainage ditch cavity is expanded 200mm to build the basement inner wall;

[0040] 2) The lower 750mm high part of the masonry wall is cast with plain concrete, and a 50mm diameter PVC water pipe is reserved inside the anti-embankment before casting.

[0041] 5. Construction treatment of partition walls in basement:

[0042] 1) The lower part of other internal masonry walls in the basement (lowest floor) shall adopt 750mm high plain concrete anti-slope, and at least two 50@3000 PVC wall penetration pipes shall be embedded in each wall panel surface.

[0043] 6. Internal treatment of drainage ditch:

[0044] 1) Pour plain concrete at the bottom of the drainage ditch, and embed floor drains and drainage pipes every 5 to 10 meters before pouring;

[0045] 2) A U-shaped prefabricated drainage culvert with a diameter of 150 mm is used at the top of the drainage ditch;

[0046] 3) The prefabricated culvert is opened according to the location of the floor drain, corresponding to the reserved position of the drainage blind pipe.

[0047] 7. Maintenance door treatment:

[0048] 1) To prevent the drainage ditch and floor drain from being blocked due to prolonged use or other unexpected situations, resulting in poor drainage and leakage in the basement, an inspection door should be installed according to the location of the floor drain.

[0049] The working principle of this utility model's high-efficiency underground structure for blocking and draining water in deep foundation pit engineering:

[0050] The leakage risk that may occur during the subsequent use of the concrete lining wall is passed through the water-proof cavity between the masonry inner wall and the concrete lining wall, collected by the drainage ditch, and then discharged into the collection well through the pre-buried blind pipes embedded in the anti-slope of the masonry inner wall, the floor and the inner partition wall, and then pumped out by water pump to ensure that the basement is in a dry and ventilated environment.

[0051] The high-efficiency water-blocking and drainage underground structure of the deep foundation pit project of the utility model can protect the basement structure, ensure the use function, improve the economic benefit and ensure the safety and stability of the project.

[0052] The anti-seepage design of the high-efficiency drainage underground structure of the deep foundation pit project of the utility model can ensure that the concrete maintains its original strength and stability.

[0053] The utility model's high-efficiency drainage underground structure for deep foundation pit projects can effectively prevent external water from penetrating into the basement, keeping the basement space dry. This is crucial for basements used as storage rooms, garages, or living spaces.

[0054] The utility model provides an anti-seepage measure for the high-efficiency drainage underground structure of a deep foundation pit project, which can reduce the risk of equipment getting damp and ensure the normal operation and service life of electrical and mechanical equipment in the basement.

[0055] The anti-seepage design of the high-efficiency drainage underground structure of the deep foundation pit project of the utility model can reduce the repair and renovation costs caused by basement leakage problems, help to reduce the maintenance cost of the building and improve economic benefits.

[0056] The above description is merely a preferred embodiment of the present application and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of the utility model disclosed in this application is not limited to the technical solutions formed by the specific combination of the above-mentioned technical features, but also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the concept of the utility model. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A high-efficiency underground structure for blocking and draining water in deep foundation pit engineering, characterized in that: include: A ground-connected wall, wherein a concrete lining wall is cast on the inner side of the ground-connected wall, and a bottom plate and a floor plate are cast on the inner side of the concrete lining wall; A concrete counter-ridge is formed by integrally casting the bottom plate and the floor slab. Post-cast concrete is filled between the concrete counter-ridge and the concrete lining wall. A water collection ditch is formed on the top of the post-cast concrete. The upper water collection ditch is connected to the lower water collection ditch through a vertical drainage pipe. A connecting pipe is pre-buried in the concrete counter-ridge. The bottom water collection ditch pipeline is connected to one end of the connecting pipe. The other end of the connecting pipe is connected to the water collection well through a horizontal drainage pipe. The masonry inner wall is built on the concrete counter-ridge, and a water-proof cavity is formed between the masonry inner wall and the concrete lining wall.

2. The high-efficiency underground structure for blocking and draining water in deep foundation pit engineering according to claim 1 is characterized in that: The post-cast concrete is plain concrete.

3. The high-efficiency underground structure for blocking and draining water in deep foundation pit engineering according to claim 1 is characterized in that: The connecting pipe is a PVC pipe.

4. The high-efficiency underground structure for blocking and draining water in deep foundation pit engineering according to claim 1 is characterized in that: A plurality of floor drains are arranged in the bottom water collecting ditch, and the floor drains are connected to one end of the connecting pipe through a pipeline.

5. The high-efficiency underground structure for blocking and draining water in deep foundation pit engineering according to claim 4 is characterized in that: An inspection door is provided on the inner wall of the masonry, and the position of the inspection door corresponds to the position of the floor drain.

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