CN-121978219-A - Sealing water injection device and method for ultrasonic detection of fractured rock mass

CN121978219ACN 121978219 ACN121978219 ACN 121978219ACN-121978219-A

Abstract

The invention relates to the technical field of geotechnical engineering detection, in particular to a sealing water injection device for ultrasonic detection of a broken rock mass and a use method thereof, wherein the sealing water injection device comprises a pull rod, a rock mass ultrasonic probe arranged at one end of the pull rod, a water injection multiple sealing mechanism and a drilling sealing and plugging mechanism sleeved on the outer wall of the water injection multiple sealing mechanism; the invention adopts the water injection multiple sealing and annular inflatable sealing bags to realize reliable orifice sealing, can complete full-hole section ultrasonic detection by one-time water injection, solves the problem of detection of broken rock mass, and has good sealing, convenient operation and accurate data.

Inventors

QI PENG
WANG GANG
ZHANG MINGHUAN
WANG KAI
LI XIFAN
ZHOU YANGYI
ZHOU WEIJIE
BAI XINGWEI

Assignees

金川集团股份有限公司
东北大学

Dates

Publication Date: 20260505
Application Date: 20260327

Claims (9)

1. The sealing water injection device for ultrasonic detection of the fractured rock mass comprises a pull rod (1) and a rock mass ultrasonic probe (2) arranged at one end of the pull rod (1), and is characterized by further comprising a water injection multiple sealing mechanism (3) and a drilling sealing and blocking mechanism (14) sleeved on the outer wall of the water injection multiple sealing mechanism (3), wherein the pull rod (1) penetrates through the inside of the water injection multiple sealing mechanism (3) and forms dynamic sealing fit with the inner wall of the water injection multiple sealing mechanism (3) and can reciprocate along the axial direction of the water injection multiple sealing mechanism (3), and the pull rod (1), the water injection multiple sealing mechanism (3) and the drilling sealing and blocking mechanism (14) are coaxially arranged.
2. The sealed water injection device for ultrasonic detection of fractured rock mass according to claim 1, wherein the water injection multiple sealing mechanism (3) comprises a sealing cylinder (4), a pull rod channel (10) and two water pipe channels (5) which are arranged in the sealing cylinder (4), a water return pipe (9) which is arranged in one water pipe channel (5), a stop valve (13) which is arranged on a pipe section of the water return pipe (9) and is far away from one end of a rock mass ultrasonic probe (2), a water injection pipe (8) which is arranged in the other water pipe channel (5), a first multiple sealing structure which is arranged in the inner wall of the water pipe channel (5) and a second multiple sealing structure which is arranged in the inner wall of the pull rod channel (10), wherein the pull rod channel (10) and the two water pipe channels (5) are respectively arranged along the axial direction of the sealing cylinder (4) and are respectively in a penetrating structure, the two ends of the pull rod channel (10) and the sealing cylinder (4) are coaxially arranged, the two water pipe channels (5) are symmetrically arranged along the pull rod channel (10), the pull rod channel (1) and the two ends of the pull rod channel (10) are respectively matched with the two ends of the sealing cylinder (4) in a sliding way, the pull rod (1) is tightly attached to the inner wall of the second multiple sealing structure, the water return pipe (9) and the water injection pipe (8) are respectively in sliding fit with the inner walls of the two water pipe channels (5), two ends of the water return pipe respectively extend to two ends of the sealing column body (4), and the water return pipe (9) and the water injection pipe (8) are respectively tightly attached to the inner wall of the first multiple sealing structure.
3. The sealing water injection device for ultrasonic detection of the fractured rock mass according to claim 2 is characterized in that a plurality of second annular grooves (11) which are distributed at intervals are formed in the inner side wall of the pull rod channel (10) along the length direction of the pull rod channel, the second multiple sealing structure comprises second sealing rings (12) which are respectively arranged in the second annular grooves (11), and the second sealing rings (12) are sleeved on the outer wall of the pull rod (1) and form dynamic sealing fit with the outer wall of the pull rod (1).
4. The sealed water injection device for ultrasonic detection of the fractured rock mass according to claim 2 is characterized in that a plurality of first annular grooves (6) which are distributed at intervals are formed in the inner side wall of the water pipe channel (5) along the length direction of the water pipe channel, the first multiple sealing structure comprises first sealing rings (7) which are respectively arranged in the first annular grooves (6), and the first sealing rings (7) are sleeved on the outer walls of the water return pipe (9) and the water injection pipe (8) and form static sealing fit with the outer walls of the water return pipe and the water injection pipe.
5. The sealed water injection device for ultrasonic detection of fractured rock mass according to claim 2, wherein the material of the sealing column (4) is a high-strength nylon material.
6. The sealing water injection device for ultrasonic detection of the fractured rock mass according to claim 2, wherein the drilling sealing plugging mechanism (14) comprises an annular inflatable sealing bag (15), waterproof sealing liners (16) respectively arranged on the inner wall and the outer wall of the annular inflatable sealing bag (15), an inflation valve (17) communicated with one end, far away from the rock mass ultrasonic probe (2), of the annular inflatable sealing bag (15), the waterproof sealing liner (16) arranged on the inner wall of the annular inflatable sealing bag (15) is sleeved on the outer wall of the sealing cylinder (4) and is tightly attached to the outer wall of the sealing cylinder (4), and the waterproof sealing liner (16) is a waterproof sealing adhesive tape wound on the inner wall or the outer wall of the annular inflatable sealing bag (15).
7. The sealing water injection device for ultrasonic detection of fractured rock mass according to claim 6, wherein the annular inflatable sealing bag (15) is made of a high polymer and metal composite material.
8. The sealing water injection device for ultrasonic detection of fractured rock mass according to claim 6, wherein one end of the sealing cylinder (4) and the annular inflatable sealing bag (15) far away from the rock mass ultrasonic probe (2) is provided with four epoxy resin fixing adhesive tapes (18), and the sealing cylinder (4) and the annular inflatable sealing bag (15) are fixedly connected with a rock mass with a drilling hole opening through the four epoxy resin fixing adhesive tapes (18) which are distributed in a crossing manner.
9. A method of using a sealed water injection device for ultrasonic testing of fractured rock mass according to any one of claims 1 to 8, comprising the steps of: The method comprises the steps of fixedly connecting a rock mass ultrasonic probe (2) with the front end of a pull rod (1), penetrating the pull rod (1) into a pull rod channel (10) to enable the probe (2) to be positioned at one side of a drilling hole, penetrating a water injection pipe (8) and a water return pipe (9) into corresponding water pipe channels (5) respectively, and realizing static seal through a plurality of first sealing rings (7); step two, clamping the sealing cylinder (4) at a preset position of a drilling hole, and pre-fixing the sealing cylinder (4) and the annular inflatable sealing bag (15) on the surface of a rock mass of the drilling hole through epoxy resin fixing adhesive tapes (18) which are arranged in a crossed mode; pushing the pull rod (1) to push the rock mass ultrasonic probe (2) to the bottom of the drill hole, and inflating the annular inflatable sealing bag (15) through the inflation valve (17) to enable the annular inflatable sealing bag (15) to expand and tightly attach the wall of the drill hole and the outer wall of the sealing cylinder (4), and matching with the waterproof sealing lining layer (16) to form an orifice annular sealing belt to block a channel for water in the drill hole to leak along a crack; injecting clear water into the drill hole through the water injection pipe (8), and when the water return pipe (9) flows out with continuous water flow, indicating that the drill hole is filled, closing the stop valve (13) to keep the water filling environment in the drill hole stable; Pushing or pulling the pull rod (1) to enable the rock mass ultrasonic probe (2) to axially move in the drill hole filled with water according to set intervals, performing ultrasonic detection at each measuring point, and keeping the water filling environment in the drill hole not damaged through dynamic sealing cooperation of a plurality of second sealing rings (12) and the pull rod (1) to complete ultrasonic data acquisition of the whole hole section; and step six, after the detection is finished, opening a stop valve (13) to drain accumulated water in the drilling hole, releasing gas in the annular inflatable sealing bag (15) through an inflation valve (17), removing an epoxy resin fixing adhesive tape (18), and taking the device out of the drilling hole.

Description

Sealing water injection device and method for ultrasonic detection of fractured rock mass Technical Field The invention relates to the technical field of geotechnical engineering detection, in particular to a sealing water injection device and method for ultrasonic detection of a broken rock mass. Background In the engineering fields of geotechnical engineering investigation, mining, tunnel construction and the like, the integrity detection of a broken rock mass is a core link of engineering safety design and construction, and ultrasonic detection is a mainstream means of rock mass integrity detection due to simple operation and high detection precision. The ultrasonic detection needs to use a water body as a coupling medium to enable ultrasonic signals to be transmitted to a rock mass in a high-efficiency manner, namely a wet hole detection method, but the method has key technical bottlenecks in the detection of the fractured rock mass, namely crack development of the fractured rock mass, water in a drill hole is easy to leak along cracks rapidly, a stable water filling environment cannot be formed, and the wet hole detection method is difficult to implement. At present, a dry hole detection method of a bag type probe is commonly adopted in the industry to replace, the method needs to insert the probe with a water-filled bag into a drilled hole, and the cyclic operation of 'bag water injection-expansion adherence-detection-water pumping-displacement' is completed at each measuring point, so that a plurality of defects exist in practical application: 1. the water injection and pumping processes are repeated for each measuring point, so that for deep hole detection, the detection of the whole hole section takes a long time, and the engineering progress is seriously affected; 2. the water filled bag is repeatedly rubbed with the rough hole wall and the sharp rock blocks in the drill hole, so that the bag is easy to be scratched or burst, the detection is interrupted, and the equipment maintenance cost is high; 3. The local seal of the bag type probe is easily affected by the flatness of the hole wall, the coupling effect is unstable, the ultrasonic signal is attenuated and distorted, and the reliability of detection data is low. In order to solve the above problems, there is a need to develop a sealed water injection device that can create a stable water-filled environment in a fractured rock mass borehole. Disclosure of Invention The invention aims to provide a sealing water injection device and method for ultrasonic detection of a fractured rock mass, which are used for solving the technical problems that a drilling water body is easy to leak, a bag probe is easy to damage, the detection efficiency is low, and the coupling effect is poor, so that data is distorted in ultrasonic detection of the fractured rock mass. The sealing water injection device for ultrasonic detection of the fractured rock mass comprises a pull rod, a rock mass ultrasonic probe arranged at one end of the pull rod, a water injection multiple sealing mechanism and a drilling sealing and plugging mechanism sleeved on the outer wall of the water injection multiple sealing mechanism, wherein the pull rod penetrates through the water injection multiple sealing mechanism and forms dynamic sealing fit with the inner wall of the water injection multiple sealing mechanism and can reciprocate along the axial direction of the water injection multiple sealing mechanism, and the pull rod, the water injection multiple sealing mechanism and the drilling sealing and plugging mechanism are coaxially arranged. The water injection multiple sealing mechanism comprises a sealing cylinder, a pull rod channel, two water pipe channels, a return water pipe, a stop valve, a water injection pipe, a first multiple sealing structure and a second multiple sealing structure, wherein the pull rod channel and the two water pipe channels are arranged in the sealing cylinder, the return water pipe is arranged in the water pipe channel, the stop valve is arranged on the return water pipe section and is far away from one end of a rock mass ultrasonic probe, the water injection pipe is arranged in the other water pipe channel, the first multiple sealing structure is arranged on the inner wall of the water pipe channel, the second multiple sealing structure is arranged on the inner wall of the pull rod channel, the pull rod channel and the two water pipe channels are respectively arranged along the axial direction of the sealing cylinder and are respectively in a through structure, two ends of the pull rod channel respectively penetrate through two end faces of the sealing cylinder, the pull rod channel and the sealing cylinder are coaxially arranged, the two water pipe channels are symmetrically arranged along the pull rod channel, the two ends of the pull rod channel are respectively matched with the pull rod channel in a sliding mode, the two ends of the pull rod channel