Base geological exploration borehole water inrush water stop and pressure relief device and method

Abstract

The present invention discloses a device and method for stopping and releasing water gushing from a foundation geological survey hole in the field of construction engineering technology, comprising: a water-stopping mechanism arranged in the survey hole to seal the survey hole; a drain pipe is provided on the water-stopping mechanism to discharge the gushing water in the survey hole; a water-stopping valve is provided on the drain pipe; a water pipe is connected to the drainage end of the drain pipe; a water pump is connected to the end of the water pipe; the water-stopping mechanism comprises a lower ring plate, an upper ring plate and a sealing gasket arranged between the lower ring plate and the upper ring plate. The present invention effectively solves the problem of sealing the pressurized water hole, and the pressure exerted by the pressurized water layer on the covering layer in the foundation pit is more effectively released through the joint action of the water pump, the water-stopping ring plate and the drain pipe, and the situation of large amounts of pressurized water gushing from the survey hole will not occur, which can effectively ensure the stability of the construction process.

Description

Technical Field

[0001] The present invention relates to the technical field of construction engineering, and in particular to a water-stopping and pressure-releasing device and method for a basic geological survey hole. Background Art

[0002] Beneath the backfilled mountain rubble layer lies a silty soil layer typical of the Yangtze River Basin's riverbed. Below this silty layer lies the first mudstone layer, containing large boulders and pebbles, typical of the Yangtze River Basin's riverbed boulders and pebbles. The design and survey teams determined that this layer, due to its large diameter and abundance, did not need to be excavated, and the framework foundation was constructed directly on top.

[0003] During the initial survey, many exploration holes were drilled over large boulders and strata. Because they were drilled into a confined aquifer and phreatic layer, water continued to gush out of the holes. Combined with the geological conditions of the soil layers involved in the foundation pit excavation, this would lead to numerous excavation problems, compromising slope safety. The exploration holes needed to be sealed, typically by inserting cotton cloth and stones directly into the holes to suppress the gushing water. The stones supported the water pressure, while the cotton cloth blocked the flow. A concrete cushion was then constructed directly over the hole openings. This method was quick and simple, with low construction costs and high efficiency. However, after construction, several holes began to leak, and the concrete cushion was penetrated by the gushing water, compromising construction quality. If left unchecked, this would result in immeasurable quality damage to the concrete foundation cap. Summary of the Invention

[0004] The purpose of the present invention is to provide a water-gushing, water-stopping and pressure-relieving device and method for foundation geological survey holes, so as to solve the problem raised in the above-mentioned background technology that many survey holes are located on large boulders and strata during survey. Since the drilling reaches the pressurized water layer combined with the phreatic layer, water is constantly gushing out of the survey holes. Combined with the geological conditions of the soil layer during foundation pit excavation, many excavation problems will arise, which will in turn affect the safety of the slope.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a water-stopping and pressure-relieving device for a basic geological exploration hole, comprising: a water-stopping mechanism provided in the exploration hole to seal the exploration hole;

[0006] The water-stop mechanism is provided with a drain pipe to discharge the gushing water in the exploration hole. The drain pipe is provided with a water-stop valve. The drainage end of the drain pipe is connected to a water pipe, and the end of the water pipe is connected to a water pump.

[0007] Wherein, the water-stopping mechanism includes a lower ring plate, an upper ring plate and a sealing gasket arranged between the lower ring plate and the upper ring plate.

[0008] Preferably, a blocking member located inside the sealing gasket is provided between the lower ring plate and the upper ring plate;

[0009] The blocking member includes an annular stopper and an annular moving block. A moving groove is provided on the annular stopper, and the annular moving block is slidably inserted into the moving groove.

[0010] Preferably, an annular groove is provided on the outer side wall of the sealing gasket, and a plurality of pressure blocks are provided in the annular groove;

[0011] Wherein, the pressing block is a rubber block.

[0012] Preferably, an installation box is provided between the drain pipe and the water pipe, and a screen is provided in the installation box to filter the discharged water.

[0013] Preferably, the screen is slidably arranged in the installation box, and a rod extending into the drain pipe is provided below the screen;

[0014] The insertion rod is rotatably mounted on the screen, a threaded sleeve sleeved on the insertion rod is provided in the installation box, a thread is provided on the outer wall of the insertion rod, and a push block is provided on the outer wall of the insertion rod.

[0015] Preferably, the method for stopping water gushing and releasing pressure in a basic geological survey hole, based on the device for stopping water gushing and releasing pressure in a basic geological survey hole, specifically comprises the following steps:

[0016] S1: Place the water-stop mechanism into the exploration hole;

[0017] S2: Turn on the power of the water pump to make it work, and drain the water gushing out of the exploration hole through the drainage pipe, water pipe and water pump to the outside of the foundation pit;

[0018] S3: Pour expansive anti-seepage concrete on the water-stop mechanism. After the expansive anti-seepage concrete hardens, remove the water pipes and water pumps, close the water-stop valve, and seal the exploration hole.

[0019] Compared with the prior art, the beneficial effects of the present invention are: the present invention effectively solves the problem of blocking the pressurized water holes, and through the joint action of the water pump, the water stop ring plate and the drain pipe, the pressure exerted by the pressurized water layer on the covering layer in the foundation pit is more effectively released, and there will be no situation where a large amount of pressurized water gushes out of the exploration hole, which can effectively ensure the stability of the construction process. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the connection structure between the drain pipe and the installation box of the present invention;

[0022] Figure 3 Schematic diagram of the water-stopping mechanism structure of the present invention;

[0023] Figure 4This is an enlarged schematic diagram of the structure at A of the present invention;

[0024] Figure 5 This is a schematic diagram of the connection structure between the installation box and the screen of the present invention.

[0025] In the figure: 1. exploration hole; 2. water-stop mechanism; 21. lower ring plate; 22. upper ring plate; 23. sealing gasket; 231. annular groove; 232. pressure block; 24. blocking member; 241. annular stop block; 242. annular moving block; 3. drainage pipe; 4. water-stop valve; 5. expansive anti-seepage concrete; 6. installation box; 7. water pipe; 8. water pump; 9. screen; 10. plug rod; 11. push block; 12. threaded sleeve. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] Example 1:

[0028] See also Figure 1 and Figure 2 The basic geological exploration hole water gushing stopping and pressure relief device includes: a water stopping mechanism 2 arranged in the exploration hole 1, which is used to seal the exploration hole 1, and a drain pipe 3 is provided on the water stopping mechanism 2. The water inlet end of the drain pipe 3 passes through the water stopping mechanism 2, and a water stop valve 4 is provided on the drain pipe 3. The drainage end of the drain pipe 3 is connected to a water pipe 7, and the end of the water pipe 7 is connected to a water pump 8.

[0029] To sum up, the water-stop mechanism 2 is placed in the exploration hole 1, and the water pump 8 is powered on to pump out the gushing water inside the exploration hole 1 through the drain pipe 3; after the gushing water is discharged from the foundation pit, the expansive anti-seepage concrete 5 is poured on the water-stop mechanism 2 (the expansive anti-seepage concrete 5 is between the outside of the drain pipe 3 and the inside of the exploration hole 1), and after it hardens, the water pipe 7 and the water pump 8 are removed, the water-stop valve 4 is closed, the drain pipe 3 is sealed, and the exploration hole 1 is scientifically sealed; during foundation construction, the entire water-stop and pressure-relieving device can be cast in concrete and sealed.

[0030] Further, such as Figure 3As shown, the water-stop mechanism 2 includes a lower ring plate 21, an upper ring plate 22 and a sealing gasket 23 arranged between the lower ring plate 21 and the upper ring plate 22. The sealing gasket 23 is made of rubber (with a certain elasticity); when the water-stop mechanism 2 is subjected to the pressure brought by the gushing water, it will squeeze the lower ring plate 21, thereby exerting pressure on the sealing gasket 23, causing it to extend, and promoting the sealing gasket 23 to contact the exploration hole 1 more fully, thereby ensuring the sealing performance of the water-stop mechanism 2; and the sealing gasket 23 is in full contact with the exploration hole 1, which also increases the direct pressure between the two (that is, the friction between the two is increased), making the installation of the water-stop mechanism 2 more stable.

[0031] Further, such as Figure 3 and Figure 4 As shown, a blocking member 24 is provided on the inner side of the sealing gasket 23 between the lower ring plate 21 and the upper ring plate 22, which is used to support the sealing gasket 23 so that the sealing gasket 23 cannot extend inward when squeezed, so that it can extend outward and contact the exploration hole 1 more fully; the blocking member 24 includes an annular stopper 241 and an annular moving block 242, and a moving groove is provided on the annular stopper 241, and the annular moving block 242 is slidably inserted in the moving groove so that the blocking member 24 can shrink, ensuring that the sealing gasket 23 can be squeezed by the lower ring plate 21 and the upper ring plate 22; an annular groove 231 is provided on the outer wall of the sealing gasket 23, and a plurality of groups of pressure blocks 232 are provided in the annular groove 231, and the pressure blocks 232 are rubber blocks.

[0032] Example 2:

[0033] As a preferred option, see Figure 1 、 Figure 2 and Figure 5 An installation box 6 is provided between the drain pipe 3 and the water pipe 7, and a screen 9 is provided in the installation box 6.

[0034] It should be noted that the gushing water drawn out from the exploration hole 1 passes through the installation box 6 and is filtered through the screen 9 before entering the water pipe 7 and the water pump 8, so as to prevent the drawn water from containing large pebbles, stones, etc. and protect the water pipe 7 and the water pump 8.

[0035] Further, such as Figure 5 As shown, the screen 9 is slidably arranged in the installation box 6 (the screen 9 can move up and down in the installation box 6), and a plug rod 10 is provided below the screen 9. The plug rod 10 extends into the inner cavity of the drain pipe 3, and the plug rod 10 is rotatably arranged on the screen 9. A threaded sleeve 12 is provided in the installation box 6 and is sleeved on the plug rod 10. The outer wall of the plug rod 10 is provided with a thread, and the outer wall of the plug rod 10 is provided with a push block 11;

[0036] It should be noted that during the water pumping process, when water passes through the screen 9, it will push the screen 9 upward; when the drain pipe 3 is blocked by impurities in the water and the water flow rate becomes smaller, the thrust on the screen 9 decreases (the water flow through the screen 9 becomes less), which will cause the screen 9 to move down with the insertion rod 10, and the threaded sleeve 12 will cause the insertion rod 10 to rotate and move downward, rotating with the push block 11 to dredge the drain pipe 3, prevent the drain pipe 3 from being blocked, and ensure that the water gushing inside the exploration hole 1 can be completely pumped out; and when removing the water pipe 7 and the water pump 8, the installation box 6, the insertion rod 10 and other components will also be removed.

[0037] The method for stopping water gushing and releasing pressure in a basic geological survey hole, based on the water gushing and releasing pressure device in a basic geological survey hole, specifically comprises the following steps:

[0038] S1: First, insert the upper part of the drainage pipe 3 into the water pipe 7, then connect the water pump 8, and then place the water stop mechanism 2 into the exploration hole 1 to cut off the exploration hole 1.

[0039] S2: Turn on the power supply of the water pump 8 to start the water pump 8 to pump the gushing water inside the exploration hole 1 into the drainage pipe 3, and then discharge it to the outside of the foundation pit through the water pipe 7 and the water pump 8.

[0040] S3: Quickly pour the expansive anti-seepage concrete 5 on the water-stop mechanism 2. After the expansive anti-seepage concrete 5 hardens, remove the water pipe 7 and the water pump 8, and then close the water-stop valve 4 to seal the exploration hole 1.

[0041] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. Water-stopping and pressure-relieving device for basic geological exploration holes, characterized by: include: A water-stopping mechanism (2) is provided in the exploration hole (1) to seal the exploration hole (1); The water-stop mechanism (2) is provided with a drain pipe (3) to discharge the gushing water in the exploration hole (1); the drain pipe (3) is provided with a water-stop valve (4); the drainage end of the drain pipe (3) is connected to a water pipe (7); the end of the water pipe (7) is connected to a water pump (8); Wherein, the water-stopping mechanism (2) comprises a lower ring plate (21), an upper ring plate (22), and a sealing gasket (23) provided between the lower ring plate (21) and the upper ring plate (22); A blocking member (24) located inside the sealing gasket (23) is provided between the lower ring plate (21) and the upper ring plate (22); The blocking member (24) comprises an annular stopper (241) and an annular moving block (242); a moving groove is provided on the annular stopper (241); and the annular moving block (242) is slidably inserted into the moving groove.

2. The water-stopping and pressure-relieving device for basic geological exploration holes according to claim 1, characterized in that: An annular groove (231) is formed on the outer side wall of the sealing gasket (23), and a plurality of pressure blocks (232) are arranged in the annular groove (231); Wherein, the pressing block (232) is a rubber block.

3. The water-stopping and pressure-relieving device for basic geological exploration holes according to claim 1 is characterized in that: An installation box (6) is provided between the drain pipe (3) and the water pipe (7), and a screen (9) is provided in the installation box (6) to filter the discharged water.

4. The water-stopping and pressure-relieving device for basic geological exploration holes according to claim 3 is characterized in that: The screen (9) is slidably arranged in the installation box (6), and a plug rod (10) extending into the drain pipe (3) is provided below the screen (9); The insertion rod (10) is rotatably mounted on the screen (9), a threaded sleeve (12) sleeved on the insertion rod (10) is provided in the installation box (6), a thread is provided on the outer wall of the insertion rod (10), and a push block (11) is provided on the outer wall of the insertion rod (10).

5. A method for stopping water gushing and releasing pressure in a basic geological exploration hole, according to the basic geological exploration hole water gushing and releasing pressure device according to claim 1, characterized in that: The specific steps include: S1: placing the water-stop mechanism (2) into the exploration hole (1); S2: Turn on the power supply of the water pump (8) to make the water pump (8) work, and discharge the gushing water inside the exploration hole (1) through the drainage pipe (3), the water pipe (7) and the water pump (8) to the outside of the foundation pit; S3: pouring expansion anti-seepage concrete (5) on the water-stop mechanism (2), and after the expansion anti-seepage concrete (5) hardens, removing the water pipe (7) and the water pump (8), and then closing the water-stop valve (4) to seal the exploration hole (1).

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