CN-122016141-A - Portable rapid detection device and detection method for water pressure of water burst of tunnel rock wall crack

CN122016141ACN 122016141 ACN122016141 ACN 122016141ACN-122016141-A

Abstract

The invention provides a portable rapid detection device and a detection method for water pressure of water gushing in a tunnel rock wall crack, which belong to the technical field of water gushing detection in underground engineering, and comprise a water diversion pipe and an adherence sealing cover, wherein the water diversion pipe is provided with a water pressure gauge, a self-adaptive air release pressure stabilizing valve and a drainage valve; the wall-attached sealing cover is arranged at the water inlet end of the water diversion pipe, is attached to the cracks of the rock wall, forms a sealing cavity around the water gushing of the cracks, and is provided with an annular elastic rubber ring which is elastically sealed with the rock wall at the front end. According to the invention, holes are not required to be drilled on the rock wall, and only the wall-attached sealing cover is adopted to attach the rock wall, so that the detection of the water burst of the fissures can be realized, the structure is simple and portable, the detection position can be adjusted immediately, the limitation of the traditional drilling pressure measuring mode is broken through, the rapid, accurate and nondestructive detection of the water burst pressure of the fissures of the tunnel rock wall is realized, the portability, the economy and the field adaptability are considered, and the high-efficiency technical support is provided for the early warning of the water burst disaster and the construction safety guarantee.

Inventors

ZHAO CHONGQIN
YU SHENGLI
MA JIANFEI
BAO ZHENYONG
LIAO ZHEN
WANG ZHENXING
ZHANG CHUNCHAO

Assignees

中国地质科学院水文地质环境地质研究所
中国雅江集团有限公司

Dates

Publication Date: 20260512
Application Date: 20260210

Claims (10)

1. The utility model provides a portable tunnel rock wall crack gushing water pressure short-term test device which characterized in that includes: A water conduit (2) provided with a water pressure gauge (4), a self-adaptive air release pressure stabilizing valve (3) and a drain valve (5), and The wall-attached sealing cover (1) is arranged at the water inlet end of the water diversion pipe (2) and is used for being attached to a rock wall, a sealing cavity is formed around the water burst of the crack, the water burst of the crack sealed by the sealing cavity is guided to enter the water diversion pipe (2), and an annular elastic rubber ring (10) which is elastically sealed with the rock wall is arranged at the front end of the wall-attached sealing cover (1).
2. The portable rapid detection device for the water pressure of the water burst of the tunnel rock wall fracture, which is disclosed in claim 1, is characterized by further comprising a glue injection blocking mechanism, wherein the glue injection blocking mechanism comprises an annular injection pipe (13) fixed on the inner side surface of the wall-attached sealing cover (1), a glue storage cylinder (7) communicated with the annular injection pipe (13) through a glue injection pipe (8) and a micropump (6) connected with the glue storage cylinder (7), and a plurality of injection holes (14) facing the rock wall are uniformly formed in the annular injection pipe (13) along the circumferential direction; Glue solution in the glue storage cylinder (7) is driven by the micropump (6) to be sprayed out from the spray hole (14) and is blocked in an annular shape on the inner ring of the sealing cavity so as to block water outlet channels around water burst of the crack.
3. The portable rapid detection device for the water pressure of the water burst of the tunnel rock wall fracture according to claim 2, further comprising a one-way valve (9) which is arranged on the glue injection pipe (8) and used for preventing glue solution from flowing backwards.
4. The portable rapid detection device for the water pressure of the water burst in the tunnel rock wall fissure is characterized in that the water injection pipe (8) is a hose, a pipe joint communicated with the annular jet pipe (13) is arranged on the wall-attached sealing cover (1), and the water injection pipe (8) is inserted on the pipe joint.
5. The portable rapid detection device for the water pressure of the water burst of the tunnel rock wall crack according to claim 2, wherein a plug valve (11) is further arranged at the water inlet end of the water conduit (2), the plug valve (11) is positioned outside the wall-attaching sealing cover (1), is closed before the wall-attaching sealing cover (1) attaches to the rock wall, and is opened after a glue spraying is used for sealing a water outlet channel around the crack water burst, so that glue liquid is prevented from entering the water conduit (2) to block the water conduit (2).
6. The portable rapid detection device for the water pressure of the water burst of the tunnel rock wall crack, as claimed in claim 1, is characterized in that the inner wall of the wall-attached sealing cover (1) is a conical diversion inclined surface (15), and the conical diversion inclined surface (15) is used for diversion of the crack water burst into the water guide pipe (2).
7. The portable rapid detection device for the water pressure of the water burst of the tunnel rock wall crack, as set forth in claim 1, is characterized in that the water diversion pipe (2) is a bent pipe and is sequentially divided into a pressure release pipe section (21), a bent communication pipe section (22) and a pressure measurement pipe section (23) from a water inlet end to a water outlet end, the water pressure meter (4) is arranged on the pressure measurement pipe section (23), the self-adaptive pressure release and stabilization valve (3) is arranged on the pressure release pipe section (21), and the wall-attaching sealing cover (1) is arranged at the front end of the pressure release pipe section (21); and after the self-adaptive gas-releasing and pressure-stabilizing valve (3) is used for exhausting, the crack water surge carrying bubbles and gas stagnation is introduced into the pressure-releasing pipe section (21), and after the crack water surge balanced in gas-liquid pressure is subjected to two bending reversing energy release of the bending communicating pipe section (22), the crack water surge steadily enters the pressure-measuring pipe section (23), and a stable water pressure value is measured.
8. The portable rapid detection device for the water pressure of the water gushing from the tunnel rock wall fissure is characterized in that an annular groove is formed in the front end of the wall-attaching sealing cover (1), the annular elastic rubber ring (10) is elastically clamped in the annular groove, and the annular elastic rubber ring (10) is provided with an annular sealing part which is elastically deformed and sealed and a clamping part which is clamped in the annular groove.
9. The portable rapid detection device for the water pressure of the water gushing from the tunnel rock wall cracks, as set forth in claim 8, is characterized in that the annular groove is a T-shaped groove, the shape of the clamping portion is adapted to the T-shaped groove, and the radial section of the annular sealing portion is semicircular.
10. A rapid detection method for water pressure of a wall fracture, which adopts the portable rapid detection device for water pressure of a wall fracture of a tunnel according to any one of claims 1 to 9, and is characterized in that the method comprises the following steps: Holding the water diversion pipe (2), aligning the wall-attached sealing cover (1) with the crack water burst at the first position on the rock wall, and propping against the rock wall to form a sealing cavity for sealing the crack water burst at the first position; starting a micropump (6), and spraying a circle of sealant around the water burst of the crack at the first position to seal the surrounding cracks so as to guide the water burst of the crack to be sprayed out from the first position enclosed by the sealing cavity; Closing the micropump (6), opening the plug valve (11) and the drain valve (5), enabling the water burst of the crack at the first position to enter the water conduit (2), reading the water pressure of the water burst of the crack from the water pressure meter (4), and recording the water pressure of the water burst of the crack at the first position; Selecting a plurality of points according to the trend of the crack by taking the first position as a base point, repeatedly detecting the water pressure of the crack water burst of each point, and recording one by one; Selecting crack water burst adjacent to and on different cracks on the rock wall, and repeatedly carrying out water pressure detection; And obtaining the water pressure distribution characteristic of the water burst of the cracks on the rock wall.

Description

Portable rapid detection device and detection method for water pressure of water burst of tunnel rock wall crack Technical Field The invention belongs to the technical field of underground engineering water burst detection, and particularly relates to a portable rapid detection device and a detection method for water burst pressure of a tunnel rock wall crack. Background In the tunnel construction process, the water gushing of the rock wall cracks is one of the most common and obvious-hazard geological disaster problems in underground engineering. The water pressure of the water burst in the fissure directly reflects the underground water dynamic strength, is an important parameter affecting the water burst scale and the water burst risk level, and has obvious influence on the stability of surrounding rock of a tunnel and the construction safety. If the water pressure distribution characteristics of the water gushing in the rock wall cracks can not be mastered in time in the construction process, serious accidents such as gushing water, collapse and even flooding of equipment are extremely easy to occur, and great losses are caused to engineering safety and economic benefits. Therefore, the rapid and accurate detection of the water pressure of the water burst of the tunnel rock wall crack is realized, and the method has important engineering significance for scientifically evaluating the water burst risk level, making an anti-seepage water control scheme and guaranteeing the construction safety. At present, tunnel water burst pressure detection mainly depends on a drilling pressure measuring system or a fixed pressure sensing monitoring device. Although the equipment has higher measurement accuracy, the problems of complex structure, long arrangement period, heavy equipment, high cost, poor field adaptability and the like generally exist. Especially in the stage of primary or local leakage of gushing water, the devices often need to be embedded with pressure measuring pipes or sensing elements after drilling holes on the rock wall, so that the construction process is complicated, the time consumption is long, the original rock mass structure and a crack water channel can be damaged, and secondary leakage or interference to the real water pressure state can be caused. Meanwhile, the fixed pressure measuring system is mostly used for long-term monitoring, lacks portability and quick response capability, and is difficult to adapt to the actual requirement of 'instant measurement as soon as the installation and nondestructive detection' of a construction site. The prior art has the limitations of lag response, limited deployment, insufficient applicability and the like on the whole, and is difficult to meet the requirements of high efficiency, accuracy and flexible pressure measurement under the condition of sudden water burst. Therefore, a portable detection device with compact structure, simple and convenient operation and self-adaptive wall-attaching sealing and instant pressure measurement functions is needed, so that the limitation of the traditional drilling pressure measurement mode in a complex geological environment is broken through, the rapid, accurate and nondestructive detection of the water pressure of the water burst of the tunnel rock wall crack is realized, and a powerful support is provided for rapid early warning and construction safety of the water burst disaster. Disclosure of Invention The embodiment of the invention provides a portable rapid detection device and a detection method for water pressure of water burst of a tunnel rock wall crack, aiming at realizing rapid, accurate and nondestructive measurement of the water pressure of water burst of the tunnel crack under the condition of no need of drilling. In order to achieve the purpose, the invention adopts the technical scheme that the portable rapid detection device for the water pressure of the water burst of the tunnel rock wall crack is provided, and comprises the following components: a water conduit provided with a water pressure gauge, a self-adaptive pressure release and stabilization valve and a drain valve, and The wall-attached sealing cover is arranged at the water inlet end of the water conduit and is used for being attached to a rock wall, a sealing cavity is formed around the water burst of the fissures, the water burst of the fissures sealed by the sealing cavity is guided to enter the water conduit, and an annular elastic rubber ring which is elastically sealed with the rock wall is arranged at the front end of the wall-attached sealing cover. In combination with the first aspect, in one implementation manner, the device further comprises a glue injection blocking mechanism, wherein the glue injection blocking mechanism comprises an annular injection pipe fixed on the inner side surface of the wall-attached sealing cover, a glue storage cylinder communicated with the annular injection pipe through a glue injection pip