A method for sealing underground diaphragm walls using hydrophilic materials

Abstract

To address the problems of difficulty in estimating reinforcement status and waste of grouting materials in existing sealing methods, this invention provides a method for sealing diaphragm walls using hydrophilic materials. The method comprises the following steps: First step: Cleaning the cracked area of ​​the diaphragm wall; Second step: Preparing the sealing material; Third step: Compressing and sealing the material; Fourth step: Sealing the cracks in the diaphragm wall; Fifth step: The water-soluble film bag dissolves, and the sealing material absorbs water, completing the sealing process. This invention features a reasonable overall design, simple operation, and convenient construction. The sealing method effectively avoids the grout spreading during the grouting process, preventing material waste. Furthermore, it overcomes the problems of slow grout sealing and soil disturbance, offering speed and efficiency. Additionally, this method can promptly seal leaks caused by crack expansion during periods of no construction or unsupervised operation, preventing potential losses and greatly facilitating the sealing of diaphragm walls in deep foundation pits.

Description

Technical Field

[0001] This invention belongs to the field of underground continuous wall sealing technology, and specifically relates to a method for sealing underground continuous walls using hydrophilic materials. Background Technology

[0002] A diaphragm wall is a foundation engineering project where a trenching machine is used on the ground to excavate a narrow, deep trench along the perimeter of the deep excavation project, with mud slurry as the wall support. After cleaning the trench, a steel cage is suspended inside, and then underwater concrete is poured using the tremie pipe method to form a unit trench segment. This process is repeated segment by segment to build a continuous reinforced concrete wall underground, serving as a water-cutting, seepage-proof, load-bearing, and water-retaining structure.

[0003] The joints between the sections of the diaphragm wall in a deep foundation pit are the weakest link in the waterproofing of the entire retaining structure, and are prone to leakage. Leakage of the diaphragm wall will lead to a decrease in the strength and lateral stiffness of the local wall, which will further cause soil and water loss outside the pit. In actual construction, this manifests as an increase in the lateral displacement of the diaphragm wall and an increase in ground settlement, which seriously affects the safety of the foundation pit construction and the ground environment.

[0004] Traditional methods for sealing diaphragm walls primarily involve injecting cement grout or polyurethane to fill the cavity behind the diaphragm wall, thus achieving the purpose of sealing the leak. However, as the underground pressurized water is lost, the discontinuous grout not only fails to solidify quickly, but also easily leads to material waste after injecting a large amount of grout. In addition, during the leak sealing and emergency repair process, continuous grouting will cause a certain degree of disturbance to the strata behind the wall joints. The uncertainty of grout flow in the soil makes it difficult to assess the grouting reinforcement behind the wall joints, which brings considerable inconvenience to the sealing work of diaphragm walls in deep foundation pits. Summary of the Invention

[0005] In order to effectively overcome the problems of difficulty in estimating the reinforcement situation and waste of grouting materials caused by grouting and plugging, this invention provides a method for plugging underground continuous walls using hydrophilic materials.

[0006] The technical solution of the present invention for sealing underground continuous walls using hydrophilic materials is as follows:

[0007] A method for sealing leaks in diaphragm walls using hydrophilic materials, characterized by the following steps:

[0008] Step 1: Clean the cracked areas of the diaphragm wall:

[0009] A working platform was set up at the crack in the diaphragm wall to clean the stains in the leaking area of ​​the diaphragm wall, locate the crack area, and provide operating space for sealing the leak.

[0010] Step Two: Preparation of Leak Sealing Materials

[0011] Based on the length and width of the crack, the hydrophilic material is cut into n specifications to be used for sealing cracks of different widths;

[0012] Third step: Compress and seal the material:

[0013] The cut hydrophilic material is compressed and sealed through a water-soluble film bag;

[0014] Step 4: Seal the cracks in the diaphragm wall:

[0015] The compressed and sealed sealing material is injected into the cracks in the diaphragm wall using a drilling device to seal them.

[0016] Step 5: The water-soluble film bag dissolves and the sealing material absorbs water, completing the sealing process.

[0017] After the sealing material is injected into the cracks in the diaphragm wall, the water-soluble film bag and water-soluble cable ties on the outside of the sealing material will dissolve rapidly under the action of water. Then the sealing material absorbs water and expands until it fills the space of the diaphragm wall crack and completes the sealing of the diaphragm wall crack.

[0018] Furthermore, the drilling equipment in the fourth step includes...

[0019] One strike sets up the casing;

[0020] A rotating shaft is provided on the lower side of the front end of the casing via a ratchet. Multiple replenishment bins of different sizes are provided on the rotating shaft at intervals along the circumference of the shaft, and the replenishment bins contain corresponding leak repair materials.

[0021] A transmission device capable of injecting repair material from a filling hopper corresponding to a crack in a diaphragm wall into the crack, the transmission device being disposed inside the filling housing.

[0022] Furthermore, the installation equipment also includes a leak repair material selection system, which includes a crack camera for capturing video of cracks in the diaphragm wall and a processor for analyzing the video signal captured by the crack camera to determine the model number of the leak repair material to be used. The processor is communicatively connected to the crack camera.

[0023] Furthermore, the leak repair material selection system also includes a display screen for displaying the selected leak repair material model and the corresponding repair hopper number, and the display screen is communicatively connected to the processor.

[0024] Furthermore, the transmission device includes a fixed rod disposed inside the firing housing and corresponding to the firing hole disposed in the firing housing. A firing switch, a first spring, a spring seat, a second spring, and a firing rod are sequentially sleeved on the fixed rod from its rear end to its front end. A retaining seat is provided at the tail end of the firing rod. A retaining rod for retaining the retaining seat is provided on the lower side of the middle part of the firing housing. The upper end of the retaining rod is engaged with the retaining seat. A retaining spring is provided at the lower end of the retaining rod. The upper end of the firing switch is sleeved on the fixed rod, and the lower end extends to the outside of the firing housing. A switch crossbar is provided in the middle of the firing switch. One end of the switch crossbar is disposed on the firing switch, and the other end engages with the middle part of the retaining rod in an inclined engagement manner.

[0025] Furthermore, the operation method of the transmission device includes the following steps.

[0026] First step: Align the selected material filling hopper with the crack in the diaphragm wall;

[0027] Second step: Then push the switch to the left. At this time, the switch bar also moves to the left. Because the switch bar and the locking rod are engaged on the inclined surface, and the locking rod moves downward, the locking rod compresses the locking spring and moves downward.

[0028] Third step: When the clamping rod moves downward and releases the upper end of the clamping rod from the clamping seat, it releases the obstruction of the clamping seat of the material-dispensing rod. As the dispensing switch pushes to the left, it squeezes the first spring, the spring seat and the second spring. At this time, the material-dispensing rod is ejected and dispenses the repair material into the cracks of the underground continuous wall.

[0029] This invention discloses a method for sealing diaphragm walls using hydrophilic materials. This method is rationally designed, simple to operate, and convenient to construct. It effectively prevents grout from spreading throughout the grouting process, thus avoiding material waste. Furthermore, it overcomes the problems of slow grout sealing and soil disturbance, offering speed and efficiency. Additionally, this method can promptly seal leaks caused by crack expansion during periods of inactivity or lack of monitoring, preventing potential damage and significantly facilitating the sealing of diaphragm walls in deep foundation pits. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the installation equipment for a method of sealing underground continuous walls using hydrophilic materials, according to the present invention.

[0031] Figure 2 This is a schematic diagram of the distribution of the replenishment bins in a method for sealing underground continuous walls using hydrophilic materials according to the present invention. Detailed Implementation

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become clearer from the following description and claims. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0033] Example 1

[0034] refer to Figures 1 to 2 This embodiment describes a method for sealing leaks in diaphragm walls using hydrophilic materials. The method includes the following steps:

[0035] Step 1: Clean the cracked areas of the diaphragm wall:

[0036] A working platform was set up at the crack in the diaphragm wall to clean the stains in the leaking area of ​​the diaphragm wall, locate the crack area, and provide operating space for sealing the leak.

[0037] Step Two: Preparation of Leak Sealing Materials

[0038] Based on the length and width of the crack, the hydrophilic material is cut into n specifications to be used for sealing cracks of different widths;

[0039] Third step: Compress and seal the material:

[0040] The cut hydrophilic material is compressed and sealed through a water-soluble film bag;

[0041] Step 4: Seal the cracks in the diaphragm wall:

[0042] The compressed and sealed sealing material is injected into the cracks in the diaphragm wall using a drilling device to seal them.

[0043] Step 5: The water-soluble film bag dissolves and the sealing material absorbs water, completing the sealing process.

[0044] After the sealing material is injected into the cracks in the diaphragm wall, the water-soluble film bag and water-soluble cable ties on the outside of the sealing material will dissolve rapidly under the action of water. Then the sealing material absorbs water and expands until it fills the space of the diaphragm wall crack and completes the sealing of the diaphragm wall crack.

[0045] In a preferred embodiment, the fourth step of the patching device includes a patching housing 100, a rotating shaft 200 and a transmission device 300. The rotating shaft 200 is disposed on the lower side of the front end of the patching housing 100 via a ratchet 500. Multiple replenishment bins 210 of different specifications are spaced along the circumference of the rotating shaft 200, and the replenishment bins 210 contain corresponding leak repair materials 600.

[0046] The transmission device 300 is capable of driving the leak-sealing material inside the filling bin corresponding to the crack in the underground continuous wall into the crack. The transmission device 300 is installed inside the filling shell 100.

[0047] In a preferred embodiment, the installation equipment also includes a leak repair material selection system 400. The system 400 includes a crack camera 410 for capturing video of cracks in the diaphragm wall and a processor 420 for analyzing and determining the type of leak repair material needed based on the video signal captured by the crack camera. The processor 420 is communicatively connected to the crack camera 410.

[0048] In a preferred embodiment, the leak repair material selection system 400 further includes a display screen 430 for displaying the selected leak repair material model and the corresponding repair hopper number, and the display screen 430 is communicatively connected to the processor 420.

[0049] In a preferred embodiment, the transmission device 300 includes a fixing rod 310 disposed inside the punching housing 100 and corresponding to the punching hole disposed in the punching housing 100. A punching switch 360, a first spring 320, a spring seat 330, a second spring 340 and a punching rod 350 are sequentially sleeved on the fixing rod 310 from its rear end to its front end.

[0050] A retaining seat 351 is provided at the tail end of the feeding rod 350. A retaining rod 370 for retaining the retaining seat 351 is provided on the lower side of the middle part of the feeding housing 100. The upper end of the retaining rod 370 is engaged with the retaining seat 351. A retaining spring 380 is provided at the lower end of the retaining rod 370. The upper end of the feeding switch 360 is sleeved on the fixing rod 310, and the lower end extends to the outside of the feeding housing 100. A switch crossbar 361 is provided in the middle of the feeding switch 360. One end of the switch crossbar 361 is set on the feeding switch 360, and the other end is engaged with the middle part of the retaining rod 370. The engagement is a bevel engagement.

[0051] In a preferred embodiment, the operation method of the transmission device 300 includes the following steps.

[0052] First step: Align the selected material filling hopper with the crack in the diaphragm wall;

[0053] Second step: Then push the switch to the left. At this time, the switch bar also moves to the left. Because the switch bar and the locking rod are engaged on the inclined surface, and the locking rod moves downward, the locking rod compresses the locking spring and moves downward.

[0054] Third step: When the clamping rod moves downward and releases the upper end of the clamping rod from the clamping seat, it releases the obstruction of the clamping seat of the material-dispensing rod. As the dispensing switch pushes to the left, it squeezes the first spring, the spring seat and the second spring. At this time, the material-dispensing rod is ejected and dispenses the repair material into the cracks of the underground continuous wall.

[0055] This embodiment presents a method for sealing diaphragm walls using hydrophilic materials. This method is rationally designed, simple to operate, and convenient to construct. It effectively prevents grout from spreading throughout the grouting process, thus avoiding material waste. Furthermore, it overcomes the problems of slow grout sealing and soil disturbance, offering speed and efficiency. Additionally, this method can promptly seal leaks caused by crack expansion during periods of inactivity or lack of monitoring, preventing potential damage and significantly facilitating the sealing of diaphragm walls in deep foundation pits.

[0056] The above description is merely a description of preferred embodiments of the present invention and is not intended to limit the scope of the present invention in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.

Claims

1. A method for sealing leaks in diaphragm walls using hydrophilic materials, characterized in that, The method for sealing the leak includes the following steps: Step 1: Clean the cracked areas of the diaphragm wall: A working platform was set up at the crack in the diaphragm wall to clean the stains in the leaking area of ​​the diaphragm wall, locate the crack area, and provide operating space for sealing the leak. Step Two: Preparing Repair Materials Based on the length and width of the crack, the hydrophilic material is cut into n specifications to be used for sealing cracks of different widths; Third step: Compress and seal the material: The cut hydrophilic material is compressed and sealed through a water-soluble film bag; Step 4: Seal the cracks in the diaphragm wall: The compressed and sealed sealant material is driven into the cracks in the diaphragm wall using a driving device to seal them. Step 5: The water-soluble film bag dissolves and the leak-sealing material absorbs water, completing the sealing process. After the sealing material is injected into the cracks in the diaphragm wall, the water-soluble film bag and water-soluble cable ties on the outside of the sealing material will dissolve rapidly under the action of water. Then the sealing material absorbs water and expands until it fills the space of the diaphragm wall crack and completes the sealing of the diaphragm wall crack. The equipment used in the fourth step includes One set of housing (100); A rotating shaft (200) is provided on the lower side of the front end of the casing (100) via a ratchet (500). Multiple replenishment bins (210) of different specifications are provided on the rotating shaft (200) at intervals along the circumferential direction of the rotating shaft. The replenishment bins (210) contain corresponding leak repair materials (600). A transmission device (300) capable of injecting the repair material inside the repair bin corresponding to the crack in the underground continuous wall into the crack, the transmission device (300) being disposed inside the repair housing (100); The installation equipment also includes a leak repair material selection system (400), which includes a crack camera (410) for capturing video of cracks in the diaphragm wall and a processor (420) for analyzing and determining the type of material to be used for leak repair based on the video signal captured by the crack camera. The processor (420) is communicatively connected to the crack camera (410).

2. The method for sealing underground continuous walls using hydrophilic materials as described in claim 1, characterized in that, The leak repair material selection system also includes a display screen (430) for displaying the selected leak repair material model and the corresponding repair hopper number, and the display screen (430) is communicatively connected to the processor (420).

3. The method for sealing underground continuous walls using hydrophilic materials as described in claim 2, characterized in that, The transmission device (300) includes a fixed rod (310) disposed inside the firing housing (100) and corresponding to the firing hole disposed in the firing housing (100). From the rear end to the front end of the fixed rod (310), a firing switch (360), a first spring (320), a spring seat (330), a second spring (340), and a firing rod (350) are sequentially mounted. A retaining seat (351) is provided at the tail end of the firing rod (350). A retainer for engaging the retaining seat (351) is provided on the lower side of the middle part of the firing housing (100). The upper end of the connecting rod (370) is snapped onto the card seat (351), and the lower end of the connecting rod (370) is provided with a snapping spring (380). The upper end of the switch (360) is sleeved on the fixing rod (310), and the lower end extends to the outside of the switch housing (100). A switch crossbar (361) is provided in the middle of the switch (360). One end of the switch crossbar (361) is set on the switch (360), and the other end is engaged with the middle of the connecting rod (370) in an oblique engagement manner.

4. The method for sealing underground continuous walls using hydrophilic materials as described in claim 3, characterized in that, The operation method of the transmission device includes the following steps: First step: Align the selected material filling bin with the cracks in the diaphragm wall; Second step: Then push the switch to the left. At this time, the switch bar also moves to the left. Because the switch bar and the locking rod are engaged on the inclined surface, and the locking rod moves downward, the locking rod compresses the locking spring and moves downward. Third step: When the clamping rod moves downward and releases the upper end of the clamping rod from the clamping seat, it releases the obstruction of the clamping seat of the material-dispensing rod. As the dispensing switch pushes to the left, it squeezes the first spring, the spring seat and the second spring. At this time, the material-dispensing rod is ejected and dispenses the repair material into the cracks of the underground continuous wall.

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