Turnover foundation pit water gushing depressurization plugging device

Abstract

This utility model discloses a reusable foundation pit water inrush pressure reduction and sealing device, comprising: a sealing plate, which is set at the water leakage point of the foundation pit and is fitted to the location of the water leakage point, and the sealing plate has reserved grouting holes; at least two drainage channels, which are set on the side of the sealing plate opposite to the location of the water leakage point of the foundation pit, the axial direction of each drainage channel is consistent with the normal direction of the sealing plate, and the first end of each drainage channel is inserted and connected to the sealing plate, and the second end is equipped with a drain; at least two grouting holes, which are reserved on the sealing plate, and the at least two grouting holes are set one-to-one with the at least two drainage channels. This utility model of a reusable foundation pit water inrush pressure reduction and sealing device is less affected by environmental factors, reduces the waste of grout, occupies a small area, is easy to install, and can be completely disassembled and reused.

Description

Technical Field

[0001] This utility model relates to the field of foundation pit construction technology, and in particular to a reusable foundation pit water inrush depressurization and sealing device. Background Technology

[0002] With advancements in geotechnical engineering technology, geotechnical projects such as tunnels, earth dams, subways, and landfills are increasingly being constructed in geological conditions with high water heads and great depths, leading to a rise in confined water failures. Under the influence of confined water, tiny cracks or defects appear inside the foundation pit of underground engineering projects. Confined water enters the pit through these weak points. Due to the significant pore pressure difference, the confined water causes the water inflow channels on the crack surfaces to continuously expand, ultimately destroying the foundation pit. The reasons for this are as follows:

[0003] 1. Excessive deformation at the bottom of the foundation pit due to construction disturbance, resulting in numerous tree-like cracks on the surface or inside the soil.

[0004] 2. Construction quality cannot be guaranteed, and there are defects inside the foundation pit. Under the effect of stress concentration, cracks will start to appear from these defects and eventually develop into the overall failure of the foundation pit.

[0005] 3. In the event of heavy rain, floods, or rising sea levels, the pore pressure rises sharply, and water seeps along the weak points of different structural interfaces, eventually causing the foundation pit to be damaged and generating a large amount of water inrush.

[0006] Traditional sealing methods involve using mechanical equipment to remove loose debris and silt from the water seepage point, exposing the karst water seepage channel or karst fissures. Sandbags are then stacked, and excavators are used in conjunction with manual labor to stuff cotton blankets into the water seepage hole, repeating this process multiple times until it is full and no more can be stuffed in. Finally, logs are nailed into the top of the hole to complete the initial emergency sealing. Then, sandbags or soil bags are used to counter-pressure the water head pressure at the leakage point, disperse the water flow, and slow down the water flow rate. After the counter-pressure is completed, grouting is performed. However, the above methods have disadvantages such as difficulty in balancing the water head pressure, the cotton blankets being easily washed away, significant grout loss, large footprint affecting the construction of other structures in the foundation pit, inability to be reused, and the sealing effect not being immediately apparent. Utility Model Content

[0007] The purpose of this utility model is to overcome the defects of the prior art and provide a reusable pit water inrush pressure reduction and sealing device that is less affected by environmental factors, reduces slurry waste, occupies a small area, is easy to install, and can be dismantled as a whole for reuse.

[0008] To achieve the above-mentioned technical effects, this utility model provides a reusable foundation pit water inrush pressure reduction and sealing device, which includes:

[0009] A sealing plate is installed at the leakage point of the foundation pit and is fitted to the location of the leakage point. The sealing plate has a grouting hole.

[0010] At least two drainage channels are provided on the side of the sealing plate opposite to the location of the pit leakage point. The axial direction of each drainage channel is consistent with the normal direction of the sealing plate. Each drainage channel has a first end inserted and connected to the sealing plate and a drain installed at the second end.

[0011] At least two grouting holes are reserved on the sealing plate, and at least two grouting holes are provided in a one-to-one correspondence with at least two drainage channels.

[0012] Preferably, the steam trap includes a flange fitted and installed at the second end of the drain channel and a butterfly valve provided on the flange.

[0013] Preferably, the sealing plate is evenly provided with a plurality of fixing bolts for fixing the sealing plate to the location of the leakage point in the foundation pit.

[0014] Preferably, sealing material is provided around the perimeter of the sealing plate and between the location of the leak.

[0015] Preferably, the sealing plate has holes at the positions corresponding to each of the drainage channels for the first end of the drainage channel to be inserted and connected.

[0016] A grouting sleeve is fixedly connected to each grouting hole on the side of the sealing plate opposite to the location of the leakage point, and the grouting sleeve is set perpendicular to the surface of the sealing plate.

[0017] The technical effects achieved by this utility model due to the adoption of the above technical solution are as follows:

[0018] 1) By controlling the flow rate through the dual valves, the grouting effect can be clearly and intuitively observed, and the position of the grouting pipe can be easily adjusted to control the grouting cost.

[0019] 2) It can be reused. The butterfly valve and flange of the sealing plate and steam trap have a short production cycle and are easy to install and remove. The solidified water inlet will not be damaged during the removal process, which solves the safety problems that may occur during the removal of the water sealing device. Therefore, it can be reused and saves construction costs.

[0020] 3) Using expansion screws makes it less susceptible to environmental disturbances than using cotton quilts.

[0021] 4) It has a small size and small footprint, making it easy to install in complex foundation pit environments. It also has low grout loss and fast setting, minimizing the impact on the overall construction progress while ensuring the safety of the foundation pit structure. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a front view of a reusable pit water inrush depressurization and sealing device according to an embodiment of the present invention.

[0024] Figure 2 This is a side view of a reusable pit water inrush depressurization and sealing device according to an embodiment of the present invention.

[0025] Figure 3 This is a top view of a reusable pit water inrush depressurization and sealing device according to an embodiment of the present invention.

[0026] The correspondence between the numbers in the attached diagram is as follows:

[0027] 1-Blocking plate; 2-Fixing bolt; 3-Grouting hole; 4-Grouting sleeve; 5-Drainage channel; 6-Steam trap; 61-Butterfly valve; 62-Flange. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Please see Figures 1 to 3As shown in the figure, this utility model embodiment provides a reusable foundation pit water inrush pressure reduction and sealing device, including a sealing plate 1, at least two drainage channels 5 and at least two grouting holes 3. The sealing plate 1 is set at the foundation pit leakage point and is fitted to the position of the foundation pit leakage point. At least two drainage channels 5 are set on the side of the sealing plate 1 opposite to the position of the foundation pit leakage point. The axial direction of each drainage channel 5 is consistent with the normal direction of the sealing plate 1. The first end of each drainage channel 5 is inserted and connected to the sealing plate 1, and the second end is equipped with a drain 6. At least two grouting holes 3 are reserved on the sealing plate 1, and the at least two grouting holes 3 are set in a one-to-one correspondence with the at least two drainage channels 5. It should be noted that in this embodiment, the sealing plate 1 is a 1.5m × 1.5m (length × width) steel plate, and the steel plate is made of 1cm thick Q235B steel. The drainage channel 5 is made of galvanized stainless steel pipe with a specification parameter of DN100. The steel plate is cut with an ion cutting machine according to the outer diameter of the drainage channel 5 to cut out a circular hole for the first end of the drainage channel 5 to be inserted and connected. The burrs on the outer edge of the hole are smoothed with a file to make a bevel, and then fully welded to the edge of the galvanized stainless steel pipe of the drainage channel 5.

[0030] Furthermore, in this embodiment, the steam trap 6 includes a flange 62 fitted onto the second end of the drain channel 5 and a butterfly valve 61 mounted on the flange 62. It should be noted that in this embodiment, the butterfly valve 61 is a DN100 wheel-type wafer stainless steel butterfly valve, and the flange 62 is a DN100 flat-welded flange with a rubber ring.

[0031] Furthermore, multiple fixing bolts 2 are evenly inserted on the sealing plate 1 to fix the sealing plate 1 to the location of the leakage point in the foundation pit. In this embodiment, the fixing bolts 2 are M16 expansion bolts, which are evenly arranged around the sealing plate 1. While fixing with expansion bolts, sealing material is provided between the sealing plate 1 and the leakage point. In this embodiment, the sealing material is Jintangshui Bulou for temporary sealing. After the sealing material on all four sides reaches a certain strength, the rock fissures are filled by injecting double liquid grout through the grouting holes 3. The grout will first solidify at the Jintangshui Bulou location, filling the gap between the rock surface and the sealing plate 1 tightly. On the one hand, this can reduce grout waste, and on the other hand, it can improve the cohesion between the device and the rock surface, laying the groundwork for the next step of valve closure and pressurization. It should be noted that the above-mentioned combined valve flow boosting process controls the flow rate by not completely closing the valve. That is, the grouting pipe is equipped with two valves, A and B. Valve A is gradually closed and valve B is opened. Grouting begins at the grouting hole on one side of valve A. As the grout solidifies, the flow rate of water flowing into valve A will gradually decrease, thereby reducing the flow rate of valve A. Therefore, the pressure in the guide pipe can be controlled, effectively saving grout and improving the grouting effect. The structure and principle of the above-mentioned combined valve flow boosting are existing technologies that are publicly known to those skilled in the art, and therefore will not be described in detail.

[0032] Please see Figure 1 and Figure 3 As shown, in this embodiment, the grouting hole 3 is located 10cm away from the edge of the sealing plate 1. A grouting sleeve 4 is fixedly connected to the side of the sealing plate 1 opposite to the location of the leak point, corresponding to the location of the grouting hole 3. The grouting sleeve 4 is set perpendicular to the surface of the sealing plate 1. After the grouting sleeve 4 is welded to the inner wall of the grouting hole 3, it is filled with foaming agent.

[0033] It should be noted that after grouting is completed, the seamless galvanized stainless steel pipe can be removed or the entire device can be dismantled for reuse in the next leak sealing operation. If there is no need for leak sealing, the entire device can be broken down into smaller parts. The steel plate can be used as a reinforcing material for steel structure nodes, and the seamless galvanized stainless steel pipe can be buried under the road surface as a road crossing pipe or used as a temporary fire water pipe on site. This greatly saves the material cost of sealing the leak again and avoids material waste.

[0034] All parts not described in this utility model are the same as or can be implemented using existing technology. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this utility model, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A recyclable foundation pit water gushing depressurization plugging device, characterized in that, include: A sealing plate is installed at the leakage point of the foundation pit and is fitted to the location of the leakage point. The sealing plate has a grouting hole. At least two drainage channels are provided on the side of the sealing plate opposite to the location of the pit leakage point. The axial direction of each drainage channel is consistent with the normal direction of the sealing plate. Each drainage channel has a first end inserted and connected to the sealing plate and a drain installed at the second end. At least two grouting holes are reserved on the sealing plate, and at least two grouting holes are provided in a one-to-one correspondence with at least two drainage channels.

2. The turnable foundation pit water gushing depressurization blocking device according to claim 1, characterized in that: The drain valve includes a flange fitted and installed at the second end of the drain channel and a butterfly valve provided on the flange.

3. The turnable foundation pit water gushing depressurization blocking device of claim 1, wherein: The sealing plate is evenly fitted with multiple fixing bolts for fixing the sealing plate to the location of the leakage point in the foundation pit.

4. The turnable foundation pit water gushing depressurization blocking device of claim 1, wherein: The sealing plate is surrounded by sealing material between its perimeter and the location of the leak.

5. The turnable foundation pit water gushing depressurization blocking device of claim 1, wherein: The sealing plate has holes corresponding to the positions of each drainage channel for inserting and connecting the first end of the drainage channel.

6. The reusable foundation pit water inrush pressure reduction and sealing device as described in claim 1, characterized in that: A grouting sleeve is fixedly connected to each grouting hole on the side of the sealing plate opposite to the location of the leakage point, and the grouting sleeve is set perpendicular to the surface of the sealing plate.

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