CN112857657A - Quick testing arrangement of bedrock fracture gushing water pressure in rock pulp tunnel - Google Patents
Quick testing arrangement of bedrock fracture gushing water pressure in rock pulp tunnel Download PDFInfo
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- CN112857657A CN112857657A CN202011555728.2A CN202011555728A CN112857657A CN 112857657 A CN112857657 A CN 112857657A CN 202011555728 A CN202011555728 A CN 202011555728A CN 112857657 A CN112857657 A CN 112857657A
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- pressure
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- column
- sensitive pressure
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L11/00—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/08—Means for indicating or recording, e.g. for remote indication
- G01L19/086—Means for indicating or recording, e.g. for remote indication for remote indication
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Abstract
The invention discloses a device for rapidly testing water burst pressure of bedrock fractures in a rock-magma tunnel, which comprises: the pressure receiving converter is arranged at the bottom of the light hard material retaining ring and forms a movable cavity with the inner concave part in an enclosing mode. The movable cavity is internally provided with a pressure receiving converter, a wireless transmitter, a sensitive pressure conversion ring, a sensitive pressure conversion cylinder, a sensitive pressure sensing column, a sensing column cap, a sensitive compression sensing body, a flexible sensing body and a flexible sensing protective surface to form a sensing test device. The invention can quickly test the water burst pressure of the bed rock fracture.
Description
Technical Field
The invention relates to a device for quickly testing water burst pressure of bedrock fractures in a rock-slurry tunnel.
Background
At present, with the driving of internal demand by the development of 'double circulation' in China, engineering construction is rapidly developed, a large number of line projects such as newly-built expressways appear, and the following mountainous tunnel projects such as bamboo shoots in spring after raining are carried out, but the tunnel projects are led to become the control projects of the expressways due to the particularity of the tunnel projects. The reason is that many high-speed engineering tunnels are distributed in a magma area, the regional geology is complex, one of the biggest obstacles is that the tunnels are excavated under the geological condition, and strong underground water is encountered, so that the construction is seriously interfered, and the engineering construction period is prolonged.
In tunnel engineering, when water gushes in bedrock cracks in a rock-magma tunnel, due to the fact that the water quantity and the water pressure of the water gushing in the tunnel are not known enough, subsequent design and construction schemes cannot follow up, the surrounding rock supporting scheme after the water gushing has a lot of uncertainty, and various unknown difficulties may occur in the construction process. At present, in the domestic method for testing the water pressure of the bedrock fracture, related testing equipment is distributed after the secondary lining of the tunnel is finished, the time is long, the cost is high, and the measured water pressure data is obviously delayed. Therefore, a testing device with high efficiency, low cost and high precision is urgently needed, the water pressure of water gushing in bedrock cracks can be tested in the tunnel excavation process, the water pressure is provided for design departments, a construction scheme is obtained in time, and the normal lining construction of the tunnel is ensured.
Disclosure of Invention
The invention provides a device for quickly testing the water burst pressure of bedrock fractures in a rock-slurry tunnel, and aims to quickly test the water burst pressure of the bedrock fractures in the rock-slurry tunnel in time and shorten the period of tunnel construction.
In order to achieve the purpose, the invention adopts the following scheme:
a quick testing arrangement of bedrock fracture water burst pressure in rock pulp tunnel includes:
the light hard material guard ring is provided with an inner concave part penetrating through the bottom surface;
the pressure receiving converter is arranged at the bottom of the light hard material retaining ring and forms a movable cavity with the inner concave part in an enclosing manner;
the wireless transmitter is connected with the pressure receiving converter and is used for transmitting data signals to the outside;
the sensitive pressure conversion ring is arranged at the bottom in the movable cavity and is attached to the pressure receiving converter;
the sensitive pressure conversion cylinder is arranged in the middle hole of the continuous pressure conversion ring, and the bottom of the sensitive pressure conversion cylinder is attached to the pressure receiving converter;
the sensitive pressure sensing column is positioned right above the sensitive pressure conversion cylinder, the bottom of the sensitive pressure sensing column is attached to the upper surface of the sensitive pressure conversion cylinder, and the upper part of the sensitive pressure sensing column is sleeved with a sensing column cap;
the sensitive compression sensing body is arranged in the movable cavity around the sensitive pressure sensing column, and the bottom surface of the sensitive compression sensing body is attached to the upper surface of the sensitive pressure conversion ring;
the flexible sensing body is arranged in the movable cavity around the sensitive pressure sensing column, is positioned at the upper part of the sensitive compression sensing body in the movable cavity, and has the bottom part close to the upper surface of the sensitive compression sensing body;
and the flexible sensing protective surface covers the upper surface of the flexible sensing body.
The working principle of the invention is as follows: the testing device can be fixedly installed at the water burst position of the bedrock fracture, when water burst directly acts on the sensing column cap in the bedrock fracture, pressure is transmitted to the sensitive pressure sensing column through the sensing column cap, micro motion occurs, water pressure signals are converted into digital signals after the sensitive pressure conversion column and the pressure receiving converter act together through the lower portion, then the digital signals are sent to an external receiving device through the wireless transmitter, and real-time water burst pressure acting on the sensing column cap can be obtained after the digital signals are decoded.
When water gushes in bedrock cracks and directly acts on the flexible sensing protective surface, pressure is transmitted to the flexible sensing body, the flexible sensing body displaces and acts on the sensitive compression sensing body to enable the flexible sensing body to expand and contract and deform, water pressure is converted into digital signals under the combined action of the sensitive pressure conversion ring and the pressure receiving converter, then the digital signals are sent to an external receiving device through the wireless transmitter, and the real-time water gushing pressure acting on the flexible sensing protective surface can be obtained after the digital signals are decoded.
Under most conditions, water burst in bedrock fractures generally acts on the flexible sensing protective surface and the sensing column cap at the same time, and comprehensive pressure can be calculated according to obtained pressure signals.
The invention also has the following preferred design:
the sensitive compression sensing body is composed of a plurality of sensing bodies which are uniformly distributed around the sensitive pressure sensing column and have the same structure, and adjacent sensing bodies are connected through sensing strips. When gushing water and act on different positions on flexible sensing mask in the basement rock crack, gushing water pressure and transmitting to the sensor that the lower part corresponds the position on, can all-round response gush the pressure of water all directions through polylith sensor, make the water pressure of test more accurate.
As a feasible implementation manner, the movable cavity is a hollow cavity with a wide upper part and a narrow lower part, and the lower part is a cylindrical hole.
The sensitive compression sensor body is composed of four sensor bodies with sector-shaped cross sections.
The flexible sensing protective surface is divided into four pieces, so that the four flexible sensing protective surfaces correspond to the four sensing bodies in the vertical position.
Two pressure testing modules are symmetrically arranged on two sides of the pressure receiving converter, and each pressure testing module comprises a light hard material retaining ring, a sensitive pressure conversion circular ring, a sensitive pressure conversion cylinder, a sensitive pressure sensing column, a sensing column cap, a sensitive compression sensing body, a flexible sensing body and a flexible sensing protective surface.
The invention has the following beneficial effects:
the invention has the advantages that the flexible sensing protective surface, the sensing column cap, the sensitive pressure sensing column, the flexible sensing body, the sensitive compression sensing body, the sensitive pressure conversion ring and the sensitive pressure conversion cylinder are utilized to comprehensively work in the movable cavity formed by the light hard material protective ring to test the external water pressure, the data signal is transmitted out by combining the pressure receiving converter and the digital wireless transmitter to be convenient to receive and collect, the comprehensive operation can be realized, the water pressure of the water burst of the bedrock cracks in the rock-pulp tunnel is tested with high efficiency, low cost and high precision, the water pressure of the water burst of the bedrock cracks is quickly collected and provided for a design department, a construction scheme can be timely obtained, the normal excavation and lining construction of the tunnel is ensured, and the efficiency of tunnel construction is improved.
Drawings
FIG. 1 is a front view of a device for rapidly testing water burst pressure of bedrock fractures in a rock-slurry tunnel according to the invention;
FIG. 2 is a top view of the device for rapidly testing water burst pressure of bedrock fractures in the rock-magma tunnel in FIG. 1;
FIG. 3 is a sectional view A-A of the fast water burst pressure testing device for bedrock fractures in the magma tunnel of FIG. 2, with the sensing element removed from the movable chamber;
FIG. 4 is a diagram of a movable intracavity sensing element: the combined structure chart of the sensitive pressure sensing column, the flexible sensing body, the sensitive compression sensing body, the sensitive pressure conversion ring and the sensitive pressure conversion cylinder;
fig. 5 is a sectional view B-B in fig. 4.
Description of reference numerals: 1-a flexible sensor, 2-a sensitive pressure sensing column, 3-a sensitive pressure sensor, 4-a sensitive pressure conversion ring, 5-a pressure receiving converter, 6-a light hard material guard ring, 7-a sensitive pressure conversion cylinder, 8-a wireless transmitter, 9-an induction strip, 10-an inner concave part, 11-a flexible division strip, 12-a flexible sensing guard surface and 13-a sensing column cap; 14-active lumen.
Detailed Description
The technical solutions of the present invention are described in detail below with reference to the accompanying drawings and examples, so that those skilled in the art can better understand and implement the technical solutions of the present invention.
The invention provides a device for rapidly testing the water burst pressure of bedrock fractures in a rock-slurry tunnel, which is shown in figures 1 to 5 and comprises:
the light hard material guard ring 6 is provided with an inner concave part 10 penetrating through the bottom surface, and the sensing element is installed and protected in the inner concave part 10;
the pressure receiving converter 8 is arranged at the bottom of the light hard material guard ring 6 and forms a movable cavity 14 with the inner concave part 10 in an enclosing way;
a wireless transmitter 8 connected to the pressure receiving transducer 5 for transmitting data signals to the outside;
the sensitive pressure conversion ring 4 is arranged at the bottom in the movable cavity 14 and is attached to the pressure receiving converter 5;
the sensitive pressure conversion cylinder 7 is arranged in the middle hole of the continuous pressure conversion circular ring 4, and the bottom of the sensitive pressure conversion cylinder is attached to the pressure receiving converter 5;
the sensitive pressure sensing column 2 is positioned right above the sensitive pressure conversion column 7, the bottom of the sensitive pressure sensing column is attached to the upper surface of the sensitive pressure conversion column 7, and the upper part of the sensitive pressure sensing column is sleeved with a sensing column cap 13;
the sensitive compression sensing body 3 is arranged in the movable cavity 14 around the sensitive pressure sensing column 2, and the bottom surface of the sensitive compression sensing body is attached to the upper surface of the sensitive pressure conversion ring 4;
the flexible sensing body 1 is arranged in the movable cavity 14 around the sensitive pressure sensing column 2, is positioned at the upper part of the sensitive compression sensing body 3 in the movable cavity 14, and has the bottom attached to the upper surface of the sensitive compression sensing body 3;
and the flexible sensing protective surface 12 covers the upper surface of the flexible sensing body 1.
As a preferred embodiment:
as shown in fig. 3, the movable chamber 14 is a hollow chamber with a wide top and a narrow bottom, and a cylindrical hole at the bottom.
As shown in fig. 4 and 5, the sensitive compressive sensing body 3 is composed of four sensing bodies which are uniformly distributed around the sensitive pressure sensing column 2 and have the same structure, adjacent sensing bodies are connected through a sensing strip 9, so that acting force can be transmitted among the sensing bodies, and the cross sections of the four sensing bodies are fan-shaped. The flexible sensing protective surface 12 is pressed on the flexible sensing protective surface by the four flexible dividing strips 11 and divided into four pieces, so that the four flexible sensing protective surfaces correspond to the four sensing bodies in the up-down position. When the water gushing in the bedrock cracks acts on different positions of the flexible sensing protective surface 12, the water gushing pressure is transmitted to the sensing bodies at the corresponding positions at the lower part, and the pressure in all directions of the water gushing can be sensed through the four sensing bodies, so that the tested water pressure is more accurate.
In this embodiment, two pressure testing modules are symmetrically arranged on two sides of the pressure receiving converter 5, and each pressure testing module includes a light hard material retaining ring 6, a sensitive pressure conversion ring 4, a sensitive pressure conversion cylinder 7, a sensitive pressure sensing column 2, a sensing column cap 13, a sensitive compression sensing body 3, a flexible sensing body 1, and a flexible sensing protective surface 12.
The working principle of the invention is as follows: the testing device can be fixedly installed at the water burst position of the bedrock fracture, when water burst directly acts on the sensing column cap 13 in the bedrock fracture, pressure is transmitted to the sensitive pressure sensing column 2 through the sensing column cap 13, micro motion occurs, water pressure signals are converted into digital signals after the sensitive pressure conversion column 7 and the pressure receiving converter 5 act together through the lower portion, then the digital signals are sent to an external receiving device through the wireless transmitter 8, and real-time water burst pressure acting on the sensing column cap 13 can be obtained after the digital signals are decoded.
When water gushes in bedrock cracks directly act on the flexible sensing protective surface 12, the pressure is transmitted to the flexible sensing body 1, the flexible sensing body 1 displaces and acts on the sensitive compression sensing body 3 to enable the flexible sensing body to expand and contract and deform, the water pressure is converted into a digital signal under the combined action of the sensitive pressure conversion ring 4 and the pressure receiving converter 5, then the digital signal is sent to an external receiving device through the wireless transmitter 8, and the real-time water gushing pressure acting on the flexible sensing protective surface 12 can be obtained after the digital signal is decoded.
Under most conditions, water burst in bed rock cracks generally acts on the flexible sensing protective surface and the sensing column cap at the same time, finally the sensitive pressure conversion circular ring 4 and the sensitive pressure conversion cylinder 7 are subjected to expansion and contraction deformation, and the radial stress sigma of the sensitive pressure conversion circular ring 4 and the sensitive pressure conversion cylinder 7 isrCircumferential stress σtAxial stress σaRespectively as follows:
σr＝0
from generalized hooke's law:
obtaining axial strain epsilontAnd the pressure p to be measured:
wherein E is the elastic modulus of the strained material; d2The diameter of the ring is converted for sensitive pressure; d1The diameter of the sensitive pressure conversion cylinder; μ is the poisson's ratio of the strained material; alpha is a correction compensation coefficient of the sensitive pressure sensor or the sensitive pressure sensor column, and is 0.2-0.5 according to the combination form and the size effect of the sensitive pressure sensor or the sensitive pressure sensor column.
The pressure receiving converter 5 converts physical information of the expansion deformation of the sensitive pressure conversion ring 4 and the sensitive pressure conversion cylinder 7 into digital signals, the wireless transmitter 8 sends the digital signals to an external receiving device, and a comprehensive test value of the water burst fracture pressure can be obtained through the calculation mode.
The sensitive pressure sensing column 2 can be linked with the sensitive compression sensing body 3 in the process of pressure micromotion, and jointly acts on the sensitive pressure conversion ring 4 and the sensitive pressure conversion column 7, so that the precision of a test result is improved.
As an improvement of the invention, the sensitive compression sensor body is composed of three or five or more sensor bodies which are uniformly distributed around the sensitive pressure sensing column and have the same structure, and the pressure in all directions of water inrush is sensed in an all-around mode.
The above-mentioned embodiments are merely preferred embodiments of the present invention, but should not be construed as limiting the invention, and any variations and modifications based on the concept of the present invention should fall within the scope of the present invention, which is defined by the claims.
Claims (6)
1. The utility model provides a quick testing arrangement of bedrock fracture water burst pressure in magma tunnel which characterized in that includes:
the light hard material guard ring is provided with an inner concave part penetrating through the bottom surface;
the pressure receiving converter is arranged at the bottom of the light hard material retaining ring and forms a movable cavity with the inner concave part in an enclosing manner;
the wireless transmitter is connected with the pressure receiving converter and is used for transmitting data signals to the outside;
the sensitive pressure conversion ring is arranged at the bottom in the movable cavity and is attached to the pressure receiving converter;
the sensitive pressure conversion cylinder is arranged in the middle hole of the continuous pressure conversion ring, and the bottom of the sensitive pressure conversion cylinder is attached to the pressure receiving converter;
the sensitive pressure sensing column is positioned right above the sensitive pressure conversion cylinder, the bottom of the sensitive pressure sensing column is attached to the upper surface of the sensitive pressure conversion cylinder, and the upper part of the sensitive pressure sensing column is sleeved with a sensing column cap;
the sensitive compression sensing body is arranged in the movable cavity around the sensitive pressure sensing column, and the bottom surface of the sensitive compression sensing body is attached to the upper surface of the sensitive pressure conversion ring;
the flexible sensing body is arranged in the movable cavity around the sensitive pressure sensing column, is positioned at the upper part of the sensitive compression sensing body in the movable cavity, and has the bottom part close to the upper surface of the sensitive compression sensing body;
and the flexible sensing protective surface covers the upper surface of the flexible sensing body.
2. The device for rapidly testing the water burst pressure of the bedrock fractures in the magma tunnel according to claim 1, characterized in that: the sensitive compression sensing body is composed of a plurality of sensing bodies which are uniformly distributed around the sensitive pressure sensing column and have the same structure, and adjacent sensing bodies are connected through sensing strips.
3. The device for rapidly testing the water burst pressure of the bedrock fractures in the magma tunnel according to claim 2, characterized in that: the movable cavity is a hollow cavity with a wide upper part and a narrow lower part, and the lower part is a cylindrical hole.
4. The device for rapidly testing the water burst pressure of the bedrock fractures in the magma tunnel according to claim 3, characterized in that: the sensitive compression sensor body is composed of four sensor bodies with sector-shaped cross sections.
5. The device for rapidly testing the water burst pressure of the bedrock fractures in the magma tunnel according to claim 4, characterized in that: the flexible sensing protective surface is divided into four pieces, so that the four flexible sensing protective surfaces correspond to the four sensing bodies in the vertical position.
6. The device for rapidly testing the water burst pressure of the bedrock fractures in the magma tunnel according to any one of claims 1 to 5, is characterized in that: two pressure testing modules are symmetrically arranged on two sides of the pressure receiving converter, and each pressure testing module comprises a light hard material retaining ring, a sensitive pressure conversion circular ring, a sensitive pressure conversion cylinder, a sensitive pressure sensing column, a sensing column cap, a sensitive compression sensing body, a flexible sensing body and a flexible sensing protective surface.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011555728.2A CN112857657B (en) | 2020-12-23 | 2020-12-23 | Rapid testing device for water surge pressure of bedrock crack in magma rock tunnel |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011555728.2A CN112857657B (en) | 2020-12-23 | 2020-12-23 | Rapid testing device for water surge pressure of bedrock crack in magma rock tunnel |
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| CN112857657A true CN112857657A (en) | 2021-05-28 |
| CN112857657B CN112857657B (en) | 2023-08-29 |
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| CN202011555728.2A Active CN112857657B (en) | 2020-12-23 | 2020-12-23 | Rapid testing device for water surge pressure of bedrock crack in magma rock tunnel |
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