CN110792453A - Shield tunnel segment, monitoring system and monitoring method - Google Patents
Shield tunnel segment, monitoring system and monitoring method Download PDFInfo
- Publication number
- CN110792453A CN110792453A CN201911114071.3A CN201911114071A CN110792453A CN 110792453 A CN110792453 A CN 110792453A CN 201911114071 A CN201911114071 A CN 201911114071A CN 110792453 A CN110792453 A CN 110792453A
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- tunnel
- segment
- shield tunnel
- monitoring
- sensor
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/08—Lining with building materials with preformed concrete slabs
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
- E21D11/385—Sealing means positioned between adjacent lining members
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
Abstract
The disclosure provides a shield tunnel segment, a monitoring system and a monitoring method. The shield tunnel segment comprises a segment main body, a segment cover and a segment cover, wherein the segment main body is in an arc shape of one eighth; the pipe piece comprises a pipe piece body and is characterized in that cube blocks are arranged at opposite positions of two sides of the pipe piece body, seepage pressure pipes are buried in the cube blocks, and seepage pressure sensors are arranged in the seepage pressure pipes and used for monitoring seepage pressure in real time; an integrated gas sensor is also embedded in the cubic block and used for monitoring the type and concentration of harmful gases in the tunnel in real time; a displacement sensor is embedded in the duct piece main body and used for monitoring displacement deformation of the tunnel in real time; water-resisting layers are arranged at the positions which are far away from the inner wall 1/3 and the outer wall 1/3 of the pipe piece main body; the edge of section of jurisdiction main part all is provided with the sealing layer.
Description
Technical Field
The disclosure belongs to the technical field of tunnel construction monitoring, and particularly relates to a shield tunnel segment, a monitoring system and a monitoring method.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The duct piece is the soul of shield construction. As a permanent lining structure of the tunnel, the success or failure of segment design directly relates to the quality and the service life of the shield tunnel. The self-seepage-proofing performance of the duct pieces and the sealing performance among the duct pieces are the most key factors for preventing the tunnel from seeping and controlling the concentration of harmful gas entering the tunnel. Meanwhile, the stability of the tunnel surrounding rock is directly related to the safe operation of the tunnel.
At present, the section of the urban underground shield tunnel in China is mostly circular, and a single-layer reinforced concrete segment is one of the most used shield tunnel lining structural forms at present. With the further construction of subways in various areas, the inventor finds that the segment is not applied in a targeted manner in the development area of the water-rich and gas-rich stratum in particular in the face of increasingly complex underground engineering construction environments.
Disclosure of Invention
In order to solve the problems, the shield tunnel segment, the monitoring system and the monitoring method are applicable to various complex geological conditions, the tunnel is monitored and early warned in real time, and the purposes of disaster precursor early warning and risk management and control can be achieved.
In order to achieve the purpose, the following technical scheme is adopted in the disclosure:
a first aspect of the present disclosure provides a shield tunnel segment, comprising:
a segment main body having an arc shape of one eighth;
the pipe piece comprises a pipe piece body and is characterized in that the opposite positions of two sides of the pipe piece body are respectively provided with a cube, a seepage pressure pipe is buried in the cube, a seepage pressure sensor is arranged in the seepage pressure pipe, and the seepage pressure sensor is used for monitoring the seepage pressure of a tunnel in real time; an integrated gas sensor is also embedded in the cubic block and used for monitoring the type and concentration of harmful gases in the tunnel in real time;
a displacement sensor is embedded in the duct piece main body and used for monitoring displacement deformation of the tunnel in real time; water-resisting layers are arranged at the positions which are far away from the inner wall 1/3 and the outer wall 1/3 of the pipe piece main body; the edge of section of jurisdiction main part all is provided with the sealing layer.
A second aspect of the present disclosure provides a tunnel monitoring system, which includes:
the system comprises repeaters arranged at intervals in a tunnel and a plurality of shield tunnel segments, wherein the shield tunnel segments wrap the whole tunnel section;
the osmotic pressure sensor, the integrated gas sensor and the displacement sensor in the shield tunnel duct piece are connected with the repeater; the relay is used for receiving tunnel water seepage pressure, types and concentrations of harmful gases in the tunnel and tunnel displacement deformation which are respectively uploaded by the seepage pressure sensor, the integrated gas sensor and the displacement sensor, comparing the received values with corresponding safety thresholds and judging whether to give an alarm or not.
A third aspect of the present disclosure provides a tunnel monitoring method, including:
dividing the tunnel into a plurality of sections, wherein each section is provided with a repeater and a plurality of shield tunnel segments, and the shield tunnel segments wrap the whole tunnel section;
and receiving the tunnel water seepage pressure, the type and the concentration of harmful gas in the tunnel and the tunnel displacement deformation which are respectively uploaded by the osmotic pressure sensor, the integrated gas sensor and the displacement sensor, comparing the received values with corresponding safety thresholds, and judging whether to alarm.
The beneficial effects of this disclosure are:
(1) the shield tunnel segment disclosed by the invention can be suitable for various complex geological conditions, can be used for monitoring the tunnel water seepage pressure, the types and concentration of harmful gases in the tunnel and a tunnel displacement deformation machine in real time, is provided with a water-resisting layer in the shield tunnel tube, and the edges of the segment main body are provided with sealing layers, so that the shield tunnel segment has excellent seepage resistance, and the working stability of the shield tunnel tube is improved.
(2) According to the tunnel monitoring system and the monitoring method, whether to alarm is judged by receiving the tunnel water seepage pressure, the type and concentration of harmful gas in the tunnel and the tunnel displacement deformation which are respectively uploaded by the osmotic pressure sensor, the integrated gas sensor and the displacement sensor and comparing the received values with corresponding safety thresholds, so that disaster precursor early warning and risk management and control are realized, and the stability of the tunnel is guaranteed.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and are not to limit the disclosure.
Fig. 1 is a shield tunnel segment schematic view of an embodiment of the present disclosure;
fig. 2 is a side view of a shield tunnel segment of an embodiment of the present disclosure;
fig. 3 is a top view of a shield tunnel segment of an embodiment of the present disclosure;
fig. 4 is a schematic diagram of a splicing manner of two adjacent shield tunnel segments in the embodiment of the present disclosure.
The pipe piece comprises a pipe piece body 1, a cubic block 2, a waterproof layer 3, a sealing layer 4 and a bolt 5.
Detailed Description
The present disclosure is further described with reference to the following drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
In the present disclosure, terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only relational terms determined for convenience in describing structural relationships of the parts or elements of the present disclosure, and do not refer to any parts or elements of the present disclosure, and are not to be construed as limiting the present disclosure.
In the present disclosure, terms such as "fixedly connected", "connected", and the like are to be understood in a broad sense, and mean either a fixed connection or an integrally connected or detachable connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present disclosure can be determined on a case-by-case basis by persons skilled in the relevant art or technicians, and are not to be construed as limitations of the present disclosure.
Example 1
The shield tunnel segment of this embodiment, it includes:
a segment main body 1 having an arc shape of one eighth as shown in fig. 1;
the opposite positions of two sides of the duct piece main body 1 are respectively provided with a cube 2, a seepage pressure pipe is buried in the cube, and a seepage pressure sensor is arranged in the seepage pressure pipe and used for monitoring the seepage pressure of the tunnel in real time; an integrated gas sensor is also embedded in the cubic block and used for monitoring the type and concentration of harmful gases in the tunnel in real time;
a displacement sensor is embedded in the duct piece main body and used for monitoring displacement deformation of the tunnel in real time; water-resisting layers 3 are arranged at the positions which are far away from the inner wall 1/3 and the outer wall 1/3 of the pipe piece main body, as shown in fig. 2; the edges of the segment body 1 are each provided with a sealing layer 4, as shown in fig. 3.
In specific implementation, the segment main body is formed by a plastic concrete pouring steel reinforcement framework, and strength is realized while synergistic deformation is met.
The technical scheme has the advantages that the plastic concrete elastic mold is low, the ultimate strain is large, the plastic concrete elastic mold is compatible with soft surrounding rock, the strength is linearly increased along with the surrounding pressure, the excellent seepage resistance is realized, and the safety of the tunnel is greatly improved by using the plastic concrete pouring steel reinforcement framework.
In a specific implementation, the water barrier is made of a polypropylene fiber material.
Wherein, the polyethylene fiber is a flexible waterproof gas barrier material, and chemical property is stable, and the ageing resistance can the reinforce, has good heat resistance and cold resistance, and the water barrier of this embodiment is made by polypropylene fiber material, has satisfied section of jurisdiction little deformation in coordination, has greatly strengthened the compactness of tunnel section of jurisdiction, has improved tunnel space prevention of seepage water, prevention of seepage gas performance, has improved tunnel safety precaution level greatly.
In specific implementation, the sealing layer is a polyvinyl chloride tie strip with high polymerization degree.
Wherein, the high polymerization degree polyvinyl chloride has the advantages of high strength, high toughness, good pressure resistance, good flame retardance, corrosion resistance and the like. All adopt high polymerization degree polyvinyl chloride can further improve the security seal nature in tunnel at the section of jurisdiction junction, and the large-scale calamity of management and control takes place to spread the risk.
In specific implementation, the integrated gas sensor is composed of an electrochemical carbon monoxide sensor, an electrochemical hydrogen sulfide sensor, an electrochemical sulfur dioxide sensor and an optical interference methane sensor, and is used for monitoring carbon monoxide, hydrogen sulfide, sulfur dioxide and methane and corresponding concentrations thereof respectively.
As shown in fig. 4, any two adjacent shield tunnel segments are fixedly connected by bolts 5.
It should be noted that, according to actual conditions, other fixing methods may be adopted to fixedly connect any two adjacent shield tunnel segments in the field.
The shield tunnel segment of this embodiment can be applicable to multiple complicated geological conditions, can carry out real time monitoring to harmful gas type and concentration and tunnel displacement deformation machine in tunnel infiltration pressure, the tunnel, is provided with the water barrier in the shield tunnel pipe, and the edge of section of jurisdiction main part all sets up the sealing layer, possesses good prevention of seepage nature, has improved the job stabilization nature of shield tunnel pipe.
Example 2
The tunnel monitoring system of this embodiment, it includes:
the shield tunnel comprises repeaters arranged at intervals in a tunnel and a plurality of shield tunnel segments as described in embodiment 1, wherein the shield tunnel segments wrap the whole tunnel section;
the osmotic pressure sensor, the integrated gas sensor and the displacement sensor in the shield tunnel duct piece are connected with the repeater; the relay is used for receiving tunnel water seepage pressure, types and concentrations of harmful gases in the tunnel and tunnel displacement deformation which are respectively uploaded by the seepage pressure sensor, the integrated gas sensor and the displacement sensor, comparing the received values with corresponding safety thresholds and judging whether to give an alarm or not.
In specific implementation, any two adjacent shield tunnel segments are fixedly connected through bolts.
It should be noted that, according to actual conditions, other fixing methods may be adopted to fixedly connect any two adjacent shield tunnel segments in the field.
For example: when the tunnel water seepage pressure is greater than or equal to the tunnel water seepage pressure safety threshold, outputting tunnel water seepage alarm information;
when the concentration of any harmful gas in the tunnel is greater than or equal to the safety concentration threshold value, outputting tunnel harmful gas alarm information; wherein, the harmful gas includes but is not limited to carbon monoxide, hydrogen sulfide, sulfur dioxide, methane and other gases;
and outputting tunnel displacement deformation alarm information when the tunnel displacement deformation is greater than or equal to the tunnel displacement safety threshold.
The tunnel water seepage pressure safety threshold, the safety concentration threshold and the tunnel displacement safety threshold are all known values.
In one embodiment, the repeater is further connected to an alarm device.
The alarm devices include, but are not limited to, an early warning bell and a warning light.
The embodiment is through receiving tunnel infiltration pressure, harmful gas type and concentration and tunnel displacement deformation that osmose pressure sensor, integrated gas sensor and displacement sensor uploaded respectively in tunnel to compare with corresponding safety threshold, judge whether report to the police, realized calamity precursor early warning and risk management and control, ensured the stability in tunnel.
As another embodiment, the repeater is further connected with a control center; the control center is also used for predicting the pressure change of the tunnel so as to judge the stability of the tunnel, and the process is as follows:
calling an EDEM software program to model the shield tunnel segment;
constructing a stratum model, and further combining a shield tunnel segment model to obtain a tunnel model;
initializing shield tunnel segments and stratum soil parameters;
and coupling the EDEM software and the FLUENT software, receiving preset air pressure data of the shield tunnel segment and tunnel water seepage pressure acquired in real time, carrying out numerical calculation on a tunnel model to obtain a deformation value of the shield tunnel segment, and comparing the deformation value with a preset safety critical value to predict whether the tunnel is stable.
The EDEM is the first universal CAE software which is designed by modern discrete element model technology in the world and is used for simulating and analyzing particle processing and production operation, and helps designers to design, test and optimize various bulk material processing equipment by simulating the behavior characteristics of a particle system in the bulk material processing process.
FLUENT is a commercially available CFD software package that is currently on the world's own market in the united states with a 60% share, all of which are used by industries involved in fluids, heat transfer, and chemical reactions. It has rich physical model, advanced numerical method and powerful pre-and post-processing function.
The embodiment also realizes the prediction of pressure change through a numerical analysis coupling interface, so as to analyze and judge the stability of the tunnel, improve the accuracy of the prediction of the stability of the tunnel and ensure the stability of the structure of the tunnel.
Example 3
A tunnel monitoring method according to this embodiment includes:
dividing the tunnel into a plurality of sections, wherein each section is provided with a repeater and a plurality of shield tunnel segments as described in embodiment 1, and the shield tunnel segments wrap the whole tunnel section;
and receiving the tunnel water seepage pressure, the type and the concentration of harmful gas in the tunnel and the tunnel displacement deformation which are respectively uploaded by the osmotic pressure sensor, the integrated gas sensor and the displacement sensor, comparing the received values with corresponding safety thresholds, and judging whether to alarm.
The embodiment is through receiving tunnel infiltration pressure, harmful gas type and concentration and tunnel displacement deformation that osmose pressure sensor, integrated gas sensor and displacement sensor uploaded respectively in tunnel to compare with corresponding safety threshold, judge whether report to the police, realized calamity precursor early warning and risk management and control, ensured the stability in tunnel.
In another embodiment, the monitoring method of the tunnel monitoring system further includes:
predicting the pressure change of the tunnel, and further judging the stability of the tunnel, wherein the process is as follows:
calling an EDEM software program to model the shield tunnel segment;
constructing a stratum model, and further combining a shield tunnel segment model to obtain a tunnel model;
initializing shield tunnel segments and stratum soil parameters;
and coupling the EDEM software and the FLUENT software, receiving preset air pressure data of the shield tunnel segment and tunnel water seepage pressure acquired in real time, carrying out numerical calculation on a tunnel model to obtain a deformation value of the shield tunnel segment, and comparing the deformation value with a preset safety critical value to predict whether the tunnel is stable.
The EDEM is the first universal CAE software which is designed by modern discrete element model technology in the world and is used for simulating and analyzing particle processing and production operation, and helps designers to design, test and optimize various bulk material processing equipment by simulating the behavior characteristics of a particle system in the bulk material processing process.
FLUENT is a commercially available CFD software package that is currently on the world's own market in the united states with a 60% share, all of which are used by industries involved in fluids, heat transfer, and chemical reactions. It has rich physical model, advanced numerical method and powerful pre-and post-processing function.
The embodiment also realizes the prediction of pressure change through a numerical analysis coupling interface, so as to analyze and judge the stability of the tunnel, improve the accuracy of the prediction of the stability of the tunnel and ensure the stability of the structure of the tunnel.
The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure, and various modifications and changes may be made to the present disclosure by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure.
Claims (10)
1. A shield tunnel segment, comprising:
a segment main body having an arc shape of one eighth;
the pipe piece comprises a pipe piece body and is characterized in that the opposite positions of two sides of the pipe piece body are respectively provided with a cube, a seepage pressure pipe is buried in the cube, a seepage pressure sensor is arranged in the seepage pressure pipe, and the seepage pressure sensor is used for monitoring the seepage pressure of a tunnel in real time; an integrated gas sensor is also embedded in the cubic block and used for monitoring the type and concentration of harmful gases in the tunnel in real time;
a displacement sensor is embedded in the duct piece main body and used for monitoring displacement deformation of the tunnel in real time; water-resisting layers are arranged at the positions which are far away from the inner wall 1/3 and the outer wall 1/3 of the pipe piece main body; the edge of section of jurisdiction main part all is provided with the sealing layer.
2. The shield tunnel segment of claim 1, wherein the segment body is formed of a plastic concrete cast steel skeleton, achieving strength while satisfying cooperative deformation.
3. The shield tunnel segment of claim 1, wherein the water barrier is made of a polypropylene fiber material.
4. The shield tunnel segment of claim 1, wherein the sealing layer is a high-polymerization degree polyvinyl chloride tie strip.
5. The shield tunnel segment of claim 1, wherein the integrated gas sensor is comprised of an electrochemical carbon monoxide sensor, an electrochemical hydrogen sulfide sensor, an electrochemical sulfur dioxide sensor, and an optical interference methane sensor, for monitoring carbon monoxide, hydrogen sulfide, sulfur dioxide, and methane and their respective concentrations, respectively.
6. A tunnel monitoring system, comprising:
-repeaters spaced apart in the tunnel and a plurality of shield tunnel segments according to any one of claims 1-5 which cover the entire tunnel section;
the osmotic pressure sensor, the integrated gas sensor and the displacement sensor in the shield tunnel duct piece are connected with the repeater; the relay is used for receiving tunnel water seepage pressure, types and concentrations of harmful gases in the tunnel and tunnel displacement deformation which are respectively uploaded by the seepage pressure sensor, the integrated gas sensor and the displacement sensor, comparing the received values with corresponding safety thresholds and judging whether to give an alarm or not.
7. The tunnel monitoring system of claim 6, wherein the repeater is further connected to a control center; the control center is also used for predicting the pressure change of the tunnel so as to judge the stability of the tunnel, and the process is as follows:
calling an EDEM software program to model the shield tunnel segment;
constructing a stratum model, and further combining a shield tunnel segment model to obtain a tunnel model;
initializing shield tunnel segments and stratum soil parameters;
and coupling the EDEM software and the FLUENT software, receiving preset air pressure data of the shield tunnel segment and tunnel water seepage pressure acquired in real time, carrying out numerical calculation on a tunnel model to obtain a deformation value of the shield tunnel segment, and comparing the deformation value with a preset safety critical value to predict whether the tunnel is stable.
8. The tunnel monitoring system of claim 6 wherein the repeater is further connected to an alarm device.
9. A method for monitoring a tunnel, comprising:
dividing the tunnel into segments, each segment being provided with a repeater and a plurality of shield tunnel segments according to any one of claims 1-5, which shield tunnel segments enclose the entire tunnel section;
and receiving the tunnel water seepage pressure, the type and the concentration of harmful gas in the tunnel and the tunnel displacement deformation which are respectively uploaded by the osmotic pressure sensor, the integrated gas sensor and the displacement sensor, comparing the received values with corresponding safety thresholds, and judging whether to alarm.
10. The method for monitoring a tunnel according to claim 9, wherein the method for monitoring a tunnel monitoring system further comprises:
predicting the pressure change of the tunnel, and further judging the stability of the tunnel, wherein the process is as follows:
calling an EDEM software program to model the shield tunnel segment;
constructing a stratum model, and further combining a shield tunnel segment model to obtain a tunnel model;
initializing shield tunnel segments and stratum soil parameters;
and coupling the EDEM software and the FLUENT software, receiving preset air pressure data of the shield tunnel segment and tunnel water seepage pressure acquired in real time, carrying out numerical calculation on a tunnel model to obtain a deformation value of the shield tunnel segment, and comparing the deformation value with a preset safety critical value to predict whether the tunnel is stable.
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| CN110792453B (en) | 2020-11-06 |
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