CN114111554A - Real-time measuring device and method for shield tail clearance of resistance type shield/TBM (tunnel boring machine) - Google Patents
Real-time measuring device and method for shield tail clearance of resistance type shield/TBM (tunnel boring machine) Download PDFInfo
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- CN114111554A CN114111554A CN202111385755.4A CN202111385755A CN114111554A CN 114111554 A CN114111554 A CN 114111554A CN 202111385755 A CN202111385755 A CN 202111385755A CN 114111554 A CN114111554 A CN 114111554A
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- shield
- strain gauge
- resistance strain
- real
- tbm
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/14—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring distance or clearance between spaced objects or spaced apertures
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/003—Arrangement of measuring or indicating devices for use during driving of tunnels, e.g. for guiding machines
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/0607—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield being provided with devices for lining the tunnel, e.g. shuttering
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
- G01B7/18—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge using change in resistance
Abstract
The invention discloses a real-time measuring device for a gap between a resistance type shield/TBM shield tail, which comprises a manganese steel elastic sheet and a resistance strain gauge arranged on the manganese steel elastic sheet, wherein the manganese steel elastic sheet comprises a bottom plate fixedly connected with the inner wall of the shield tail and an inclined elastic plate with one end fixedly connected with the bottom plate; the other end of the elastic plate is freely arranged and is connected with the outer wall of the duct piece in a sliding contact manner; the resistance strain gauge is arranged at the free end of the elastic plate; and the resistance strain gauge is connected with an upper computer through an RS485 communication module. A measuring method of the measuring device is also disclosed. The shield tail clearance real-time monitoring device is simple in structure, strong in adaptability to severe environments, capable of being applied to complex construction environments such as oil stains, humidity, dust and slurry, high in continuous measurement precision and capable of achieving real-time accurate monitoring of shield tail clearances.
Description
Technical Field
The invention relates to the technical field of shield tunneling machines and TBMs (tunnel boring machines), in particular to a real-time measuring device and a measuring method for a shield tail clearance of a resistance type shield/TBM.
Background
The shield tail clearance is a clearance between the inner wall of the shield tail part of the shield/TBM shield and the outer wall of the segment. In the shield construction process, as the shield/TBM tunneling posture is changed constantly, the extending lengths of all groups of thrust cylinders cannot be kept consistent constantly, and the stroke difference exists, the shield tail clearance is changed constantly. When the shield tail clearance exceeds the design allowable range, the shield of the shield/TBM and the segment generate friction, the segment is broken, the propelling resistance of the shield/TBM is increased, and the tunneling speed is reduced; the sealing effect of the shield tail brush can be directly reduced, and even a shield tail sealing system is damaged, so that cement paste leaks outwards; in severe cases, duct piece dislocation, tunnel leakage, ground collapse, etc. may even occur. Therefore, the shield tail clearance must be measured in real time during shield/TBM construction, and the tunneling attitude is continuously adjusted after combining data such as stroke difference of a propulsion oil cylinder, so as to ensure the smooth construction of the shield/TBM.
At present, in the shield/TBM construction process in China, the commonly used shield tail clearance measurement method mainly comprises manual measurement and non-contact measurement. The measurement point position of each time of the manual measurement method cannot be kept fixed, the continuity of shield tail gap data is poor, the technical level and the measurement mode of a measurer are different, the measurement precision is relatively low, and relatively complex construction environment can cause great potential safety hazard to the measurer. For a non-contact measurement method, various technologies such as laser vision and ultrasonic waves exist, but the non-contact measurement method has high requirements on the surrounding environment, the shield/TBM construction environment is relatively complex, the non-contact measurement method has frequent faults due to factors such as oil stains, mud, dust and humidity, the measurement data continuity is poor, and the maintenance cost is high.
Disclosure of Invention
In view of the above, the present invention provides a real-time measurement apparatus for a gap between a resistive shield and a TBM shield, which has high measurement accuracy, low measurement accuracy and strong adaptability to the environment, in view of the defects of the prior art; a measuring method of the measuring device is also provided.
In order to achieve the purpose, the invention adopts the following technical scheme:
a real-time measuring device for a shield tail clearance of a resistance type shield/TBM (tunnel boring machine) comprises a manganese steel elastic sheet and a resistance strain gauge arranged on the manganese steel elastic sheet, wherein the manganese steel elastic sheet comprises a bottom plate fixedly connected with the inner wall of the tail of a shield and an inclined elastic plate with one end fixedly connected with the bottom plate; the other end of the elastic plate is freely arranged and is connected with the outer wall of the duct piece in a sliding contact manner; the resistance strain gauge is arranged at the free end of the elastic plate; and the resistance strain gauge is connected with an upper computer through an RS485 communication module.
Aiming at the technical scheme, the manganese steel elastic sheet has strong elasticity, so that the free end of the manganese steel elastic sheet can be always in contact with the outer wall of the duct piece, when the gap between the shield tails becomes small, the manganese steel elastic sheet is extruded, the free end of the elastic sheet can be bent and deformed, and when the gap between the shield tails becomes large, the external force is released, and the manganese steel elastic sheet can automatically recover to the original position; the resistance strain gauge deforms along with the free end of the elastic sheet, deformation data are output to an upper computer through an RS485 communication module, and the upper computer analyzes the deformation data to obtain a change value of the shield tail clearance; the elastic plate tilting type arrangement is favorable for more accurate deformation data measurement.
A measuring method of a real-time measuring device for a shield tail clearance of a resistance type shield/TBM (tunnel boring machine) comprises the following steps:
(1) a plurality of measuring devices are uniformly distributed at the shield tail gap of the shield/TBM along the circumference;
(2) fixing a bottom plate on the inner wall of the tail part of the shield, wherein the free end of an elastic plate is tightly attached to the outer wall of the segment under the action of the elasticity of the elastic plate and is obliquely arranged along the reverse direction of shield/TBM tunneling;
(3) fixing the resistance strain gauge at the free end of the elastic plate, so that the resistance strain gauge synchronously deforms along with the elastic plate of the manganese steel elastic sheet, and monitoring the strain value of the elastic plate in real time by the resistance strain gauge;
(4) the resistance strain gauge transmits detected data to an upper computer through an RS485 communication module, and the upper computer processes the received data to obtain a corresponding shield tail gap value.
Preferably, a plurality of the measuring devices arranged in the step (1) are positioned on the same cross section of the inner wall of the tail part of the shield.
According to the method, a plurality of groups of shield tail clearance data of different positions of the shield tail are measured through a plurality of shield/TBM shield tail clearance real-time measuring devices, the shield tail clearance data of the groups are analyzed, the accuracy of segment installation is obtained, and reference basis is provided for segment type selection and posture adjustment.
The method is simple to operate, good in measured data continuity, high in measured data precision, wide in application range, strong in safety, low in requirement on the technical level of workers and low in maintenance cost.
The invention has the beneficial effects that:
when the shield tail gap changes, the duct piece extrudes or releases the free end of the manganese steel elastic sheet, the manganese steel elastic sheet is bent or restored to the original position under the action of the elasticity of the manganese steel elastic sheet, the resistance strain gauge is driven to synchronously deform, the strain value of the manganese steel elastic sheet is detected by the resistance strain gauge, and the real-time data of the shield tail gap is obtained by the upper computer according to the strain value.
The invention adopts a resistance-type measuring mode to measure the shield tail clearance value, thereby avoiding the problems of low efficiency, large error, discontinuous numerical value and unfixed point position of a manual measuring mode and also avoiding the problem of poor environmental adaptability of a non-contact measuring mode.
The shield tail clearance real-time monitoring device is simple in structure, strong in adaptability to severe environments, capable of being applied to complex construction environments such as oil stains, humidity, dust and slurry, high in continuous measurement precision and capable of achieving real-time accurate monitoring of shield tail clearances.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
In the figure: 1 section of jurisdiction, 2 shield afterbody, 3 bottom plates, 4 resistance strain gauges, 5 RS485 communication module, 6 host computers, 7 elastic plates.
Detailed Description
The invention is further described below with reference to the figures and examples.
Example 1
As shown in fig. 1, a real-time measurement device for a gap between a resistance shield and a TBM shield tail comprises a manganese steel spring plate and a resistance strain gauge 4 arranged on the manganese steel spring plate, wherein the manganese steel spring plate comprises a bottom plate 3 fixedly connected with the inner wall of a shield tail 2 and an inclined elastic plate 7 with one end fixedly connected with the bottom plate 3; the other end of the elastic plate 7 is freely arranged and is connected with the outer wall of the duct piece 1 in a sliding contact manner; the resistance strain 4 sheet is arranged at the free end of the elastic plate 7; the resistance strain gauge 4 is connected with the upper computer 6 through the RS485 communication module 5.
Manganese steel shell fragment self has very strong elasticity, and the manganese steel shell fragment can be extruded when shield tail clearance diminishes, and the free end bending deformation of elastic plate 7, when shield tail clearance grow, external force release between shield tail inner wall and the section of jurisdiction outer wall, the manganese steel shell fragment restores to the normal position by oneself, guarantees that the free end of flexure strip 7 keeps in contact with the outer wall of section of jurisdiction 1 all the time. The resistance strain gauge 4 synchronously deforms along with the free end of the elastic sheet, and the strain value of the elastic sheet is detected in real time. The strain value signals detected by the resistance strain gauge 4 are transmitted to the upper computer 6 through the RS485 communication module 5, and the corresponding shield tail clearance values are obtained through conversion and then displayed on the upper computer 6.
Example 2
A measuring method of a real-time measuring device for a shield tail clearance of a resistance type shield/TBM (tunnel boring machine) comprises the following steps:
(1) a plurality of measuring devices are uniformly distributed at the shield tail gap of the shield/TBM along the circumference, and the measuring devices are positioned on the same cross section of the inner wall of the shield tail part 2;
(2) fixing a bottom plate 3 on the inner wall of the shield tail part 2, wherein the free end of an elastic plate 7 is tightly attached to the outer wall of the duct piece 1 under the action of the elasticity of the elastic plate and is obliquely arranged along the reverse direction of shield/TBM tunneling;
(3) fixing the resistance strain gauge 4 at the free end of the elastic plate 7, so that the resistance strain gauge 4 synchronously deforms along with the elastic plate 7 of the manganese steel elastic sheet, and the resistance strain gauge 4 monitors the strain value of the elastic plate 7 in real time;
(4) the resistance strain gauge 4 transmits the detected data to the upper computer 6 through the RS485 communication module 5, and the upper computer processes the received data to obtain a corresponding shield tail gap value.
During initial installation, the manganese steel elastic sheet and the resistance strain gauge 4 are installed, an initial strain value detected by the resistance strain gauge 4 is recorded, and initial value setting is carried out in the upper computer 6; the resistance strain gauge 4 can synchronously generate deformation along with the free end of the manganese steel elastic sheet; when the shield tail clearance changes, the segment 1 can extrude or release the free end of the elastic plate 7, the elastic plate 7 bends or recovers the original position under the action of elasticity of the elastic plate 7, the resistance strain gauge 4 is driven to synchronously deform, the resistance strain gauge 4 detects the strain value of the elastic plate 7, and the upper computer 6 obtains the current shield tail clearance value through data processing according to the real-time signal sent by the RS485 communication module 5.
A plurality of shield/TBM shield tail clearance real-time measuring device is evenly installed on the inner wall of the shield tail part 2, all measuring devices are evenly distributed along the circumferential direction, shield tail clearance values of different positions of the shield tail part 2 are respectively measured through the plurality of measuring devices, shield tail clearance data of different positions are analyzed, the accuracy of segment installation can be obtained, and reference basis is provided for segment selection and posture adjustment.
It should be noted that the device structures, ratios, sizes, and the like shown in the drawings are only used for understanding and reading the disclosure, and are not used for limiting the practical limitations of the present invention; any modification of the structure, change of the ratio or adjustment of the size without affecting the function and the purpose of the invention should be considered as the scope of the present invention without substantially changing the technical content.
The apparatus elements referred to in the above embodiments are conventional apparatus elements unless otherwise specified, and the structural arrangements, operations, or controls referred to in the above embodiments are conventional in the art unless otherwise specified.
Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and other modifications or equivalent substitutions made by the technical solutions of the present invention by those of ordinary skill in the art should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.
Claims (3)
1. A real-time measuring device for a shield tail clearance of a resistance type shield/TBM (tunnel boring machine) is characterized by comprising a manganese steel elastic sheet and a resistance strain gauge arranged on the manganese steel elastic sheet, wherein the manganese steel elastic sheet comprises a bottom plate fixedly connected with the inner wall of the shield tail and an inclined elastic plate with one end fixedly connected with the bottom plate; the other end of the elastic plate is freely arranged and is connected with the outer wall of the duct piece in a sliding contact manner; the resistance strain gauge is arranged at the free end of the elastic plate; and the resistance strain gauge is connected with an upper computer through an RS485 communication module.
2. The measuring method of the real-time measuring device for the shield tail clearance of the resistive shield/TBM according to claim 1, is characterized by comprising the following steps:
(1) a plurality of measuring devices are uniformly distributed at the shield tail gap of the shield/TBM along the circumference;
(2) fixing a bottom plate on the inner wall of the tail part of the shield, wherein the free end of an elastic plate is tightly attached to the outer wall of the segment under the action of the elasticity of the elastic plate and is obliquely arranged along the reverse direction of shield/TBM tunneling;
(3) fixing the resistance strain gauge at the free end of the elastic plate, so that the resistance strain gauge synchronously deforms along with the elastic plate of the manganese steel elastic sheet, and monitoring the strain value of the elastic plate in real time by the resistance strain gauge;
(4) the resistance strain gauge transmits detected data to an upper computer through an RS485 communication module, and the upper computer processes the received data to obtain a corresponding shield tail gap value.
3. The method for measuring the real-time gap between the tail of the resistive shield/TBM according to claim 2, wherein the plurality of measuring devices provided in step (1) are located on the same cross section of the inner wall of the tail of the shield.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111385755.4A CN114111554A (en) | 2021-11-22 | 2021-11-22 | Real-time measuring device and method for shield tail clearance of resistance type shield/TBM (tunnel boring machine) |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111385755.4A CN114111554A (en) | 2021-11-22 | 2021-11-22 | Real-time measuring device and method for shield tail clearance of resistance type shield/TBM (tunnel boring machine) |
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| Publication Number | Publication Date |
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| CN114111554A true CN114111554A (en) | 2022-03-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111385755.4A Pending CN114111554A (en) | 2021-11-22 | 2021-11-22 | Real-time measuring device and method for shield tail clearance of resistance type shield/TBM (tunnel boring machine) |
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| DE2750461A1 (en) * | 1977-11-11 | 1979-05-17 | Deutsche Forsch Luft Raumfahrt | Displacement transducer for fracture toughness tests on metals - uses two rigid arms joined at one end by spring link to which strain-gauges are attached |
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| DE102005005734A1 (en) * | 2004-02-12 | 2005-09-01 | Rietschle Thomas Memmingen Gmbh | Bladder type sensor for use in a evaluation system for an automobile seat has sensor and reference mounted on or in the skin of the bladder so that their relative movement can be used to measure a bladder dimension or mass |
| EP2778600A1 (en) * | 2013-03-15 | 2014-09-17 | Matthias Patzke | Measuring unit, apparatus and method for measuring gaps and/or openings |
| CN205138415U (en) * | 2015-09-25 | 2016-04-06 | 广州汽车集团股份有限公司 | Answer variant displacement measurement device |
| CN111272125A (en) * | 2020-03-25 | 2020-06-12 | 上海隧道工程有限公司 | System for measuring shield tail clearance and measuring method thereof |
| CN111272047A (en) * | 2020-03-25 | 2020-06-12 | 上海隧道工程有限公司 | Shield tail gap measuring device and method for shield machine |
| CN211503954U (en) * | 2020-03-25 | 2020-09-15 | 上海隧道工程有限公司 | Shield tail gap measuring device of shield machine |
| CN211651507U (en) * | 2020-04-30 | 2020-10-09 | 中铁工程装备集团有限公司 | Novel mechanical shield tail clearance measuring device |
-
2021
- 2021-11-22 CN CN202111385755.4A patent/CN114111554A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2750461A1 (en) * | 1977-11-11 | 1979-05-17 | Deutsche Forsch Luft Raumfahrt | Displacement transducer for fracture toughness tests on metals - uses two rigid arms joined at one end by spring link to which strain-gauges are attached |
| DE10015155A1 (en) * | 2000-03-27 | 2001-10-18 | Metronom Indvermessung Gmbh | Device and method for measuring gap widths and mechanical tension, e.g. for measuring gaps in doors during car bodywork production, applies a flexible element under tension into a gap as well as a distance retainer |
| DE102005005734A1 (en) * | 2004-02-12 | 2005-09-01 | Rietschle Thomas Memmingen Gmbh | Bladder type sensor for use in a evaluation system for an automobile seat has sensor and reference mounted on or in the skin of the bladder so that their relative movement can be used to measure a bladder dimension or mass |
| EP2778600A1 (en) * | 2013-03-15 | 2014-09-17 | Matthias Patzke | Measuring unit, apparatus and method for measuring gaps and/or openings |
| CN205138415U (en) * | 2015-09-25 | 2016-04-06 | 广州汽车集团股份有限公司 | Answer variant displacement measurement device |
| CN111272125A (en) * | 2020-03-25 | 2020-06-12 | 上海隧道工程有限公司 | System for measuring shield tail clearance and measuring method thereof |
| CN111272047A (en) * | 2020-03-25 | 2020-06-12 | 上海隧道工程有限公司 | Shield tail gap measuring device and method for shield machine |
| CN211503954U (en) * | 2020-03-25 | 2020-09-15 | 上海隧道工程有限公司 | Shield tail gap measuring device of shield machine |
| CN211651507U (en) * | 2020-04-30 | 2020-10-09 | 中铁工程装备集团有限公司 | Novel mechanical shield tail clearance measuring device |
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