An underwater intelligent grouting reinforcement device for dam foundation settlement caused by earthquake liquefaction

Abstract

The present invention discloses an underwater intelligent grouting reinforcement device for dam body settlement caused by earthquake liquefaction of dam foundation, which relates to the technical field of dam foundation detection and repair, and comprises a lower drill device, which is fixed at a position where a hole is to be drilled; a drill wall, which is fixed on the lower drill device and through which drilling operations are performed; a detection component, which is detachably mounted on the lower end of the drill wall; an extension wall, which is mounted on an end of the detection component away from the drill wall and has a slurry outlet at its lower end; a grouting pipe, which is fixed on the lower drill device and passes through the drill wall, the detection component and the extension wall; and a drill bit, which is fixed on the extension wall.

Description

Technical Field

[0001] The present invention relates to the technical field of dam foundation detection and repair, and in particular to an underwater intelligent grouting reinforcement device for dam body settlement caused by earthquake liquefaction of the dam foundation. Background Art

[0002] The reservoir dam is located on a deep overburden layer, and earthquakes will cause liquefaction and settlement of the dam foundation. Therefore, it is necessary to inspect and repair the dam foundation after the earthquake so that the liquefied parts can be accurately repaired. However, the existing grouting reinforcement device cannot detect the liquefaction position. When using it, it is necessary to first use it to drill a hole, and then put in a sampling device to take soil samples. After sampling, the detection device is put in to determine whether liquefaction has occurred. Finally, concrete is injected into the liquefied position to achieve solidification of the liquefied position and achieve the purpose of emergency reinforcement. This method requires reciprocating drilling and removal of the grouting reinforcement device, which can easily cause the liquefied position to collapse, and the liquefied position cannot be detected in real time during drilling, and the degree of automation is low.

[0003] In view of the above problems, the present invention provides an underwater intelligent grouting reinforcement device for dam body settlement caused by earthquake liquefaction of the dam foundation to solve the above problems. Summary of the Invention

[0004] To achieve the above-mentioned object, the present invention provides the following technical solution: an underwater intelligent grouting reinforcement device for dam foundation earthquake liquefaction-induced dam body settlement, comprising:

[0005] The drilling device is fixed at the location where the hole is to be drilled;

[0006] A wall drill is fixed on the lower drilling device and performs drilling operations through the lower drilling device;

[0007] a detection assembly detachably mounted on the lower end of the drill wall;

[0008] An extension wall is installed at one end of the detection assembly away from the drill wall, and a slurry outlet is opened at the lower end of the extension wall;

[0009] A grouting pipe, fixed to the lowering device and passing through the drilling wall, the detection assembly and the extension wall; and

[0010] A drill bit is fixed on the extension wall.

[0011] Furthermore, preferably, the detection component includes:

[0012] The detection wall is configured as two and is connected to the drilling wall and the extension wall through a plurality of connecting ears, and the upper and lower ends of the detection wall are provided with connecting grooves, and the inside of the two detection walls near the bottom is jointly provided with a detection chamber, and the outer wall of the detection chamber is provided with a sampling port;

[0013] two sampling assemblies, both fixed to the outer wall of the detection wall and corresponding to the sampling port; and

[0014] The screening component is fixed in the detection chamber.

[0015] Furthermore, preferably, the sampling component includes:

[0016] There are three fixed blocks, which are fixed to the outer wall of the detection wall, and the upper end surface of the fixed block in the middle is fixed with a sampling motor;

[0017] There are two rotating shafts, which are rotatably arranged in the three fixed blocks, and the two rotating shafts form a 90° angle, and the ends close to each other are connected to the sampling motor through a bevel gear set; and

[0018] The sampling plate is fixed on the rotating shaft, and a scraper is fixed on one end of the sampling plate away from the rotating shaft for scraping and sampling the inner wall of the borehole.

[0019] Further, preferably, the screening assembly includes:

[0020] a fixed cylinder, fixed in the detection chamber, with its bottom end extending into the extension wall;

[0021] a sliding cylinder, slidably disposed in the fixed cylinder;

[0022] a screen, sleeved on the outer wall of the sliding cylinder and capable of sliding in the detection chamber; and

[0023] The detection blocks are configured into four pieces, are circumferentially fixed on the outer wall of the screen, can slide on the inner wall of the detection chamber, and are provided with a reset spring between the detection blocks and the inner wall of the detection chamber.

[0024] Furthermore, preferably, a plurality of bolt holes are provided on the outer wall of the sliding cylinder near the top end, and bolts are threadedly connected to the bolt holes, and the bolts are used to clamp the grouting pipe;

[0025] Furthermore, preferably, a pressure sensor is fixed in the detection block, a sliding ball is slidably provided on a side of the detection block away from the screen, and a pressure spring is provided between the sliding ball and the pressure sensor.

[0026] Further, preferably, a first sensing hole and a second sensing hole are opened at corresponding positions of the detection chamber and the detection block, and the first sensing hole is located above the second sensing hole, the first sensing hole and the second sensing hole are consistent with the size of the sliding ball, and a plurality of through holes are opened at the bottom of the detection chamber.

[0027] Furthermore, preferably, the drill bit and the slurry outlet are hollowed out at positions corresponding to the slurry outlet to allow the slurry and coolant to flow out.

[0028] Compared with the prior art, the present invention provides an underwater intelligent grouting reinforcement device for dam foundation earthquake liquefaction-induced dam body settlement, which has the following beneficial effects:

[0029] In the present invention, by installing the detection component on the drill wall, it can be moved synchronously with the drilling work, so that the hole wall is sampled at intervals during drilling, and the sampled soil is tested to determine whether it has liquefied. After all the tests are completed, grouting is carried out through the grouting pipe, which improves the degree of automation. In addition, coolant can be injected through the grouting pipe during drilling to cool the drill bit. During grouting, the drill bit can be rotated slowly to stir the slurry, thereby avoiding the generation of bubbles between the slurry and affecting the stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A partial schematic diagram of an underwater intelligent grouting reinforcement device for dam foundation settlement caused by earthquake liquefaction;

[0031] Figure 2 A schematic diagram of a detection component of an underwater intelligent grouting reinforcement device for dam foundation settlement caused by earthquake liquefaction;

[0032] Figure 3 This is an enlarged schematic diagram of point A of an underwater intelligent grouting reinforcement device used for dam foundation settlement caused by earthquake liquefaction;

[0033] In the figure: 1. Drill wall; 2. Grouting pipe; 3. Detection assembly; 4. Connecting ear; 5. Extension wall; 6. Slurry outlet; 7. Drill bit; 31. Detection wall; 32. Fixed block; 33. Sampling motor; 34. Sampling plate; 35. Screening assembly; 311. Detection chamber; 312. Connecting groove; 341. Scraper; 351. Fixed cylinder; 352. Sliding cylinder; 353. Bolt hole; 354. Screen; 355. Detection block; 356. Sliding ball; 357. Reset spring; 358. First sensing hole; 359. Second sensing hole. DETAILED DESCRIPTION

[0034] Reference Figures 1 to 3 The present invention provides a technical solution: an underwater intelligent grouting reinforcement device for dam foundation earthquake liquefaction-induced dam body settlement, comprising:

[0035] The drilling device is fixed at the location where the hole is to be drilled;

[0036] A drilling wall 1 is fixed to the lower drilling device and performs drilling operations through the lower drilling device;

[0037] A detection component 3 is detachably mounted on the lower end of the drill wall 1;

[0038] An extension wall 5 is installed at an end of the detection component 3 away from the drilling wall 1, and a slurry outlet 6 is opened at the lower end thereof;

[0039] A grouting pipe 2 is fixed to the lowering device and passes through the drilling wall 1, the detection assembly 3 and the extension wall 5; and

[0040] The drill bit 7 is fixed on the extension wall 5 .

[0041] It should be noted that the dam foundation can be divided into four layers from top to bottom according to its components, so at least four tests are required when the detection component 3 detects it to determine the liquefaction position of the dam foundation.

[0042] In this embodiment, the detection component 3 includes:

[0043] The detection wall 31 is configured as two and is connected to the drilling wall 1 and the extension wall 5 through a plurality of connecting ears 4. The upper and lower ends of the detection wall 31 are provided with a connecting groove 312. The two detection walls 31 are provided with a detection chamber 311 near the bottom, and the outer wall of the detection chamber 311 is provided with a sampling port.

[0044] Two sampling assemblies are provided, both of which are fixed on the outer wall of the detection wall 31 and correspond to the sampling ports; and

[0045] The screening assembly 35 is fixed in the detection chamber 311 .

[0046] As a preferred embodiment, the sampling component includes:

[0047] There are three fixed blocks 32 , which are fixed to the outer wall of the detection wall 31 , and a sampling motor 33 is fixed to the upper end surface of the middle fixed block 32 ;

[0048] There are two rotating shafts, which are rotatably arranged in the three fixed blocks 32, and the two rotating shafts form a 90° angle, and the ends close to each other are connected to the sampling motor 33 through a bevel gear set; and

[0049] The sampling plate 34 is fixed on the rotating shaft, and a scraper 341 is fixed on one end of the sampling plate away from the rotating shaft for scraping and sampling the inner wall of the borehole.

[0050] Among them, when sampling, the rotation of the drill bit 7 is first stopped, and then the sampling motor 33 is used to rotate the sampling plate 34, so that the scraper 341 is in contact with the inner wall of the borehole, and then the drilling device is slowly rotated and slightly lifted back and forth. At this time, the sampling motor 33 causes the sampling plate 34 to continue to rotate, so that it always contacts the inner wall of the borehole, which is convenient for sampling the inner wall of the borehole. The soil sample taken enters the screening component 35 along the sampling plate 34 for screening and detection.

[0051] As a preferred embodiment, the screening assembly 35 includes:

[0052] A fixed cylinder 351 is fixed in the detection chamber 311, and its bottom end extends into the extension wall 5;

[0053] A sliding cylinder 352 is slidably disposed in the fixed cylinder 351;

[0054] The screen 354 is sleeved on the outer wall of the sliding cylinder 352 and can slide in the detection chamber 311; and

[0055] The detection blocks 355 are configured as four and are circumferentially fixed to the outer wall of the screen 354 and can slide on the inner wall of the detection chamber 311 . A return spring 357 is provided between the detection blocks 355 and the inner wall of the detection chamber 311 .

[0056] As a preferred embodiment, a plurality of bolt holes 353 are provided on the outer wall of the sliding cylinder 352 near the top end. Bolts are connected to the inner threads of the bolt holes 353 , and the bolts are used to clamp the grouting pipe 2 .

[0057] It should be noted that the initial position of the sliding cylinder 352 is higher than the upper end surface of the screen 354, which prevents the soil sample from falling directly from the sliding cylinder 352, and the gap between the sliding cylinder 352 and the grouting pipe 2 can allow the soil sample to fall out. That is to say, after each screening is completed, the sliding cylinder 352 is pressed down by the grouting pipe 2 to move synchronously until it falls below the upper end surface of the screen 354, so that the soil sample is discharged, which is convenient for the next group of screening.

[0058] As a preferred embodiment, a pressure sensor is fixed in the detection block 355 , a sliding ball 356 is slidingly provided on the side of the detection block 355 away from the screen, and a pressure spring is provided between the sliding ball 356 and the pressure sensor.

[0059] As a preferred embodiment, the detection chamber 311 and the detection block 355 are provided with a first sensing hole 358 and a second sensing hole 359 at corresponding positions, and the first sensing hole 358 is located above the second sensing hole 359. The first sensing hole 358 and the second sensing hole 359 are consistent in size with the sliding ball 356, and a plurality of through holes are provided at the bottom of the detection chamber 311.

[0060] It should be noted that the aperture of the through hole needs to be greater than 10 mm to facilitate the discharge of the soil sample, and the aperture of the screen 354 is 5 mm to facilitate its blocking of soil samples with a particle size greater than 5 mm.

[0061] Among them, when the soil sample falls on the screen 354, the weight of the soil sample causes the screen 354 to slide down, and when the sliding ball 356 passes through the first sensing hole 358 and the second sensing hole 359, the pressure of the pressure sensor decreases, thereby judging the weight of the soil sample on the screen 354. That is to say, when the soil sample falls on the screen 354, the screen 354 slides down. When the pressure of the pressure sensor decreases for the second time (that is, the sliding ball 356 is located in the second sensing hole 359), sampling is stopped at this time, thereby ensuring that the weight of each sample is the same. Then the device is rotated as a whole to perform rotary screening of the soil sample. Soil samples with a particle size of less than 5 mm fall down the screen 354, causing the screen 354 to move upward. At this time, the pressure of the pressure sensor increases. When the screening is completed, the pressure of the pressure sensor decreases during the screening process or when the device stops rotating (that is, the sliding ball 356 passes through the first sensing hole 358). This indicates that the weight of particles with a particle size greater than 5 mm in the soil sample is greater than or equal to 70% of the total weight, that is, the soil sample has not liquefied, otherwise liquefaction has occurred.

[0062] The drill bit 7 and the slurry outlet 6 are hollowed out at positions corresponding to each other to allow the slurry and coolant to flow out.

[0063] That is to say, during grouting, the drill bit 7 can be rotated slowly to stir the slurry and avoid bubbles between the slurry that affect stability.

[0064] Specifically, the detection component 3 is first installed on the drill wall 1 and the extension wall 5, and then the drilling work is carried out through the drill bit 7. Every time a layer of dam foundation is drilled, the hole wall is sampled through the detection component 3 to determine whether it has liquefied. After all the tests are completed, if there is a liquefied area, grouting is carried out through the grouting pipe 2, which improves the degree of automation. In addition, during drilling, coolant can also be injected through the grouting pipe 2 to cool the drill bit. During grouting, the drill bit 7 can be rotated slowly to stir the slurry to avoid bubbles between the slurry.

[0065] The above is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. An underwater intelligent grouting reinforcement device for dam foundation settlement caused by earthquake liquefaction, characterized by: include: The drilling device is fixed at the location where the hole is to be drilled; A wall drill is fixed on a lower drilling device and performs drilling operations through the lower drilling device; A detection assembly is detachably mounted on the lower end of the drill wall; The extension wall is installed at the end of the detection assembly away from the drill wall, and a slurry outlet is opened at the lower end; A grouting pipe is fixed to the lower drill device and passes through the drill wall, the detection assembly and the extension wall; a drill bit, fixed to the extension wall; The detection components include: The detection wall is configured as two and is connected to the drilling wall and the extension wall through a plurality of connecting ears. The upper and lower ends of the detection wall are provided with connecting grooves. The two detection walls are provided with a detection chamber near the bottom, and the outer wall of the detection chamber is provided with a sampling port. The sampling components are configured as two, both of which are fixed on the outer wall of the detection wall and correspond to the sampling ports; Screening assembly, fixed in the detection chamber; The sampling components include: The fixed blocks are configured into three and fixed on the outer wall of the detection wall, and the upper end surface of the fixed block located in the middle is fixed with a sampling motor; The rotating shaft is configured as two and is rotatably set in three fixed blocks, and the two rotating shafts form a 90° angle, and the ends close to each other are connected to the sampling motor through a bevel gear set; The sampling plate is fixed on the rotating shaft, and a scraper is fixed on the end away from the rotating shaft for scraping and sampling the inner wall of the borehole; Screening components include: A fixed cylinder is fixed in the detection chamber, and its bottom end extends into the extension wall; A sliding cylinder, slidably arranged in the fixed cylinder; The screen is sleeved on the outer wall of the sliding cylinder and can slide in the detection chamber; The detection blocks are configured in four pieces, circumferentially fixed to the outer wall of the screen, and can slide on the inner wall of the detection chamber, and a return spring is provided between the detection blocks and the inner wall of the detection chamber; The initial position of the sliding cylinder is higher than the upper end surface of the screen, and the gap between the sliding cylinder and the grouting pipe is large enough to allow the soil sample to fall out; A pressure sensor is fixed in the detection block, and a sliding ball is provided on the side of the detection block away from the screen, and a pressure spring is provided between the sliding ball and the pressure sensor; A first sensing hole and a second sensing hole are opened at corresponding positions of the detection chamber and the detection block, and the first sensing hole is located above the second sensing hole. The first sensing hole and the second sensing hole are consistent in size with the sliding ball, and multiple through holes are opened at the bottom of the detection chamber.

2. The underwater intelligent grouting reinforcement device for dam foundation earthquake liquefaction-induced dam body settlement according to claim 1, characterized in that: A plurality of bolt holes are provided on the outer wall of the sliding cylinder near the top end, and bolts are threadedly connected to the bolt holes, and the bolts are used to clamp the grouting pipes.

3. The underwater intelligent grouting reinforcement device for dam foundation earthquake liquefaction-induced dam body settlement according to claim 1, characterized in that: The corresponding positions of the drill bit and the slurry outlet are hollowed out to allow the slurry and coolant to flow out.

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