An emergency plugging device for leakage of deep foundation pit

Abstract

This utility model relates to an emergency sealing device for deep foundation pit leakage. The main body is a steel plate. A drainage hole is provided on the surface of the steel plate near the upper edge. A drainage pipe connector with a drainage valve is connected to the drainage hole. A grouting hole is provided at the lower part of the steel plate. A double-threaded connector is provided at the grouting hole. A screw-operated nut seat is provided on the outer side of the double-threaded connector corresponding to the grouting hole of the steel plate, and the nut seat limits the movement against the outer surface of the steel plate. When not in use, the two ends of the double-threaded connector are sealed by threaded caps. When in use, the outer thread of the double-threaded connector is connected to a liquid supply valve, and the inner thread is connected to the grouting pipe. The circumference of the steel plate is provided with threaded holes for fixing to the wall of the leakage opening. By fitting and fixing the steel plate to the leakage opening, and providing the aforementioned grouting hole and drainage hole, the grouting hole allows for internal grouting, while the drainage hole allows for drainage of seepage water. This simultaneous grouting and water drainage effectively achieves the grout-stopping operation, resulting in high sealing efficiency and good effect.

Description

Technical Field

[0001] The utility model relates to the field of deep foundation pit construction structures, and is an emergency plugging device for deep foundation pit leakage. Background Art

[0002] During the existing deep foundation pit construction operation, in order to ensure construction safety, it is usually necessary to carry out enclosure treatment on the foundation pit. However, during the construction process, it is inevitable to encounter the situation of water seepage, so it is necessary to plug the leakage holes in time. The existing leakage plugging structure for deep foundation pit construction operations, such as the authorized announcement number CN212656247U published in the Chinese patent literature, the authorized announcement date is March 5, 2021, and the utility model name is "a leakage plugging device for deep foundation pits". It includes a "channel-shaped" steel plate, and connection flats that fit the foundation pit wall are designed on both sides of the steel plate. A diversion through-hole is designed in the middle of the boss. By filling a high-strength mortar layer in the gap between the boss and the foundation pit wall, the plugging effect is achieved. However, such leakage plugging devices of this structure are usually suitable for situations with less leakage. When the leakage volume is large, due to the large flow rate, fast flow velocity, and high pressure, it is relatively difficult to directly introduce mortar through the diversion through-hole for construction operations. And using general methods such as sandbags for plugging is time-consuming and laborious, and the effect is not good. Therefore, it is necessary to improve the existing deep foundation pit leakage plugging device. Summary of the Invention

[0003] To overcome the above deficiencies, the purpose of the present utility model is to provide an emergency plugging device for deep foundation pit leakage to the art, so as to solve the existing technical problems. Its purpose is achieved through the following technical solutions.

[0004] An emergency plugging device for deep foundation pit leakage, the main body of the plugging device is a steel plate. The key structural point is that a drainage hole is provided near the upper plate edge of the steel plate surface. The drainage hole is externally connected to a drainage pipe joint with a drainage valve. A grouting hole is provided at the lower part of the steel plate. A double-threaded joint is arranged at the grouting hole. A nut seat for screwing operation is provided on the outer side of the double-threaded joint corresponding to the grouting hole of the steel plate, and is limited by the nut seat to the outer side surface of the steel plate. When not in use, the two ends of the double-threaded joint are sealed by screwing on a cap through the thread. When in use, the outer joint thread of the double-threaded joint is connected to a liquid supply valve, and the inner joint thread is connected to a grouting pipe; screw hole seats for fixing to the wall surface of the leakage hole are arranged at intervals on the peripheral surface of the steel plate. Through the above steel plate being fitted and fixed to the leakage hole of the foundation pit, the above grouting hole and drainage hole are provided. The grouting hole realizes internal grouting, and the drainage hole is used for water diversion. Thus, water diversion and grouting are carried out simultaneously. When the slurry flows out at the drainage hole, the drainage valve is closed to realize the slurry stopping operation, and the closing efficiency is relatively high and the effect is good.

[0005] Below the grouting holes in the steel plate is a spare grouting hole, which is fitted with another identical double-threaded connector. This structure allows for grouting operation to continue from the other grouting hole if the grouting pipe connected to one of the grouting holes fails; or for grouting pipes connected to both grouting holes to simultaneously grout at different depths of the leak, thereby improving the efficiency of leak sealing.

[0006] The steel plate is fixed to the leak opening to be sealed using expansion bolts and threaded holes. The drainage valve of the drainage pipe joint is located on the outside of the steel plate and connected to the drainage pipe. The outer connector of the double-threaded joint is connected to a liquid supply valve, which is connected to a grout supply pipe. The grout supply pipe branches into two lines, connecting to a water glass supply pipe and a cement grout supply pipe respectively, and both the water glass supply pipe and the cement grout supply pipe are equipped with control valves. The inner connector of the double-threaded joint is connected to a grouting pipe, which extends into the leak to be sealed. This structure, as a specific implementation structure for leak sealing, makes it easier to form an effective seal during grouting by extending the grouting pipe deep into the leak. Furthermore, by observing the liquid discharge from the drainage pipe, the condition of the grout inside the leak can be determined, allowing for timely closure of the drainage valve and effective sealing.

[0007] The grouting pipe is an extension pipe, meaning that adjacent grouting pipe sections are connected and sealed with a threaded joint and a threaded seat to form an extension pipe. This structure allows for convenient adjustment of the grouting pipe length according to the depth of the seepage.

[0008] The inner connector of the double-threaded joint at the backup grouting hole is connected to the grouting pipe. The end of the grouting pipe is threaded onto a cap. The cap is designed to automatically seal the inner end of the double-threaded joint when the liquid pressure inside the steel plate is greater than the pressure outside; and to automatically open the cap at the end of the grouting pipe when external grout is introduced into the backup grouting hole. This structure allows the backup grouting pipe to be activated at any time as needed, ensuring smooth grouting.

[0009] The cap connected to the outer connector of the double-threaded joint is replaced with a stainless steel threaded cap. This structure achieves better sealing and corrosion resistance.

[0010] One end of the drainage pipe connector, which extends into the steel plate, is connected to a filter screen. This structure prevents large particles such as gravel from clogging the drainage holes and thus prevents drainage failure.

[0011] This utility model has a relatively simple overall structure, can be quickly assembled and used on the construction site, has high leakage sealing efficiency and good effect, and is suitable for use as a leakage sealing device for various deep foundation pits, or as a structural improvement of similar devices. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model.

[0013] Figure 2 yes Figure 1 The side view diagram shows that the spare grouting hole is equipped with a double threaded connector.

[0014] Figure 3 This is a schematic diagram of the implementation state of this utility model.

[0015] The numbers and names in the diagram are as follows: 1. Steel plate, 101. Screw hole seat, 2. Drainage pipe connector, 3. Double screw connector, 301. Nut seat, 4. Spare grouting hole, 5. Cap, 6. Expansion bolt, 7. Drainage pipe, 8. Filter screen, 9. Grouting pipe, 901. Liquid supply valve, 10. Water glass liquid supply pipe, 11. Cement slurry liquid supply pipe, 12. Grouting pipe. Implementation

[0016] The present invention will now be further described with reference to the accompanying drawings.

[0017] like Figures 1-3 As shown, the main body of the deep foundation pit leakage emergency sealing device is a steel plate 1. A drainage hole is provided near the top edge of the steel plate, and a drainage pipe connector 2 with a drainage valve is connected to the drainage hole. A grouting hole and a spare grouting hole 4 are provided at the bottom of the steel plate, with a vertical spacing of 10cm between them. A double-threaded connector 3 is provided at both the grouting hole and the spare grouting hole. A screw-operated nut seat 301 is provided on the outer side of the double-threaded connector corresponding to the grouting hole on the steel plate, and the nut seat limits the movement against the outer side of the steel plate. When not in use, the two ends of the double-threaded connector are connected to a cap 5 by threads. When in use, the outer thread of the double-threaded connector is connected to a liquid supply valve 901, and the inner thread is connected to a grouting pipe 12. The caps are made of rubber or nylon. The caps are designed to automatically seal the inner end of the double-threaded connector when the liquid pressure inside the steel plate is greater than the pressure outside, and automatically open when external grout is introduced into the spare grouting hole. To achieve reliable sealing, the external connector of the double-threaded joint of the spare grouting hole can also be connected to a stainless steel threaded cap to achieve better sealing and corrosion resistance; the steel plate is provided with threaded hole seats 101 at intervals on the periphery for fixing to the wall of the seepage hole.

[0018] like Figure 3As shown, when the emergency sealing device is installed and used, the screw hole seat 101 is fixed to the wall of the seepage opening by expansion bolts 6. The drainage valve of the drainage pipe connector 2 is located on the outside of the steel plate and connected to the drainage pipe 7. The inner end of the drainage pipe connector is connected to a locking ring to form a limit, and the thread at this end is also connected to a filter screen 8 to prevent large particles from clogging the drainage pipe connector. The outer connector of the double screw connector 3 is threaded to the liquid supply valve 901. The liquid supply valve is connected to the grout supply pipe 9. The grout supply pipe branches into two lines, which are respectively connected to the water glass liquid supply pipe 10 and the cement slurry liquid supply pipe 11. Both the water glass liquid supply pipe and the cement slurry liquid supply pipe are equipped with control valves. The inner connector of the double screw connector is threaded to the grouting pipe 12. The grouting pipe extends into the seepage opening to be sealed. The grouting pipe is a joint pipe, that is, adjacent grouting pipe sections are sealed and connected by a threaded port and a threaded seat to form a joint pipe. During construction, observe the liquid discharge status of the drainage pipe. If the discharge changes from water to slurry, close the drainage valve of the drainage pipe joint, and close the water glass supply pipe, cement slurry supply pipe, and supply valve. Then wait for the sealing to complete. Once the sealing has solidified, remove the expansion bolts, rotate the drainage pipe joint and the double-threaded joint to remove the steel plate. After cleaning, the components can be reused.

[0019] When the seepage hole is large and difficult to seal, the double-threaded connector 3 of the grouting hole 4 can be used to connect the external grouting pipe 9 and the internal grouting pipe 12 at the same time to form a dual grouting operation. The two grouting pipes extend into the seepage hole at different lengths and positions, so as to achieve simultaneous grouting at two positions and improve the efficiency and success rate of grouting and sealing.

[0020] When the grouting pipe 12 connected to the double-threaded connector 3 of the grouting hole cannot continue grouting due to solidification or reduced fluidity during the leakage sealing construction, the liquid supply valve 901 outside the grouting hole can be closed, and then disconnected and connected to the double-threaded connector of the spare grouting hole 4. The liquid supply valve can then be opened, and the cap 5 of the grouting pipe inside the double-threaded connector can be directly pushed open by the grouting pressure, so that the grouting sealing construction can continue until the liquid state of the drainage pipe changes from water to mud, at which point the grouting construction can be stopped.

[0021] The above description is intended to illustrate the technical means of this utility model and is not intended to limit the technical scope of this utility model. Any obvious improvements or substitutions made to this utility model by those skilled in the art based on existing common knowledge also fall within the protection scope of the claims of this utility model.

Claims

1. An emergency sealing device for deep foundation pit leakage, the main body of which is a steel plate (1), characterized in that... The steel plate (1) has a drainage hole near the upper edge of the plate surface. The drainage hole is connected to a drainage pipe connector (2) with a drainage valve. The lower part of the steel plate has a grouting hole. A double threaded connector (3) is provided at the grouting hole. The double threaded connector is provided with a screw-operated nut seat (301) on the outside of the grouting hole of the steel plate. The nut seat limits the connection with the outer side of the steel plate. When the two ends of the double threaded connector are not in use, they are sealed by threaded caps (5). When in use, the outer connector of the double threaded connector is threaded to the liquid supply valve, and the inner connector is threaded to the grouting pipe (12). The steel plate has threaded holes (101) spaced apart on its circumference for fixing to the wall of the seepage opening.

2. The emergency sealing device for deep foundation pit leakage according to claim 1, characterized in that... A spare grouting hole (4) is provided below the grouting hole of the steel plate (1), and the spare grouting hole is equipped with another identical double threaded joint (3).

3. The emergency sealing device for deep foundation pit leakage according to claim 2, characterized in that... The inner connector of the double-threaded joint (3) at the spare grouting hole (4) is connected to the grouting pipe (12). The end of the grouting pipe is connected to the cap (5) by thread. The cap is set to automatically seal the inner end of the double-threaded joint when the liquid pressure inside the steel plate (1) is greater than the pressure outside; and automatically open the cap at the end of the grouting pipe when external grout is introduced into the spare grouting hole.

4. The emergency sealing device for deep foundation pit leakage according to claim 3, characterized in that... The cap (5) connected to the outer connector of the double screw connector (3) is replaced with a stainless steel threaded cap.

5. The emergency sealing device for deep foundation pit leakage according to claim 1, characterized in that... The steel plate (1) is fixed to the seepage opening to be sealed by the screw hole seat (101) and expansion bolt (6). The drainage valve of the drainage pipe joint (2) is located on the outside of the steel plate and connected to the drainage pipe (7). The outer joint of the double screw joint (3) is connected to the liquid supply valve (901). The liquid supply valve is connected to the grout supply pipe (9). The grout supply pipe branches into two lines and is connected to the water glass liquid supply pipe (10) and the cement grout liquid supply pipe (11) respectively. Both the water glass liquid supply pipe and the cement grout liquid supply pipe are equipped with control valves. The inner joint of the double screw joint is connected to the grouting pipe (12). The grouting pipe extends into the seepage opening to be sealed.

6. The emergency sealing device for deep foundation pit leakage according to claim 1, characterized in that... The grouting pipe (12) is a joint pipe, that is, adjacent grouting pipe sections are connected by a threaded port and a threaded seat to form a joint pipe.

7. The emergency sealing device for deep foundation pit leakage according to claim 1, characterized in that... The end of the drain pipe connector (2) that extends into the steel plate is connected to the filter screen (8).

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