CN117589350A - Test device for measuring shield propulsion resistance in expandable rock stratum - Google Patents
Test device for measuring shield propulsion resistance in expandable rock stratum Download PDFInfo
- Publication number
- CN117589350A CN117589350A CN202311509145.XA CN202311509145A CN117589350A CN 117589350 A CN117589350 A CN 117589350A CN 202311509145 A CN202311509145 A CN 202311509145A CN 117589350 A CN117589350 A CN 117589350A
- Authority
- CN
- China
- Prior art keywords
- shield
- shell
- base
- resistance
- test device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000011435 rock Substances 0.000 title claims abstract description 51
- 238000012360 testing method Methods 0.000 title claims abstract description 33
- 238000007789 sealing Methods 0.000 claims abstract description 14
- 239000002184 metal Substances 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 3
- 230000005641 tunneling Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
- G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
- G01L1/2206—Special supports with preselected places to mount the resistance strain gauges; Mounting of supports
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention relates to the technical field of expansion rock resistance tests, in particular to a test device for measuring shield propulsion resistance in an expansion rock stratum, which comprises a shield shell and a data acquisition instrument, wherein the top and the bottom of the shield shell are respectively provided with a sealing ring, the shield shell consists of a shield inner shell and a shield outer shell, the outer wall of the shield inner shell is provided with a resistance strain gauge, the lower part of the shield shell is provided with an automatic hydraulic jack, the top output end of the automatic hydraulic jack is connected with a base, the base is arranged in the shield inner shell, an expansion soft rock sample is arranged on the base, and a pressure sensor is further arranged on the base.
Description
Technical Field
The invention relates to the technical field of expansive rock resistance tests, in particular to a test device for measuring shield propulsion resistance in an expansive rock stratum.
Background
Soft rock problems have been a relatively difficult problem encountered in underground engineering. While soft rock problems are well known in the engineering community, the concept of soft rock has been relatively ambiguous so far. The soft rock has the characteristics of loosening, crushing, easy deformation and the like, and is obviously influenced by engineering force especially when underground engineering is excavated. The engineering characteristics of soft rock and the deformation rule of surrounding rock are further studied, and the method has important significance for engineering construction and theoretical research.
In the soft rock category, there is such a lithology that phyllite which is strongly differentiated-fully weathered has the characteristics of obvious water swelling and water loss and shrinkage, and is extremely sensitive to the changes of factors such as the temperature, humidity, pressure and groundwater of the environment. The tunneling of the shield tunnel is carried out in the rock stratum, besides the conventional stabilization of the excavation face and the control of side wall sedimentation or bulge, the expansion of the expansive soft rock caused by the action of water in the wall-protecting slurry can be encountered, surrounding rock is deformed, surrounding soil is converged inwards, and the tunnel face is reduced. The combined action of the surrounding rock pressure and the expansion pressure causes the tunneling resistance to increase.
Expansion contact pressure, defined as: due to the expansion effect, the pressure value acting on the structure after the structure has been deformed transversely is stabilized. It is necessary to study the expansion contact pressure distribution law and the friction force generated thereby. The current research is mainly focused on theoretical calculation and numerical simulation, and is rarely involved in more visual model tests.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a test device for measuring shield propulsion resistance in an expandable stratum.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the utility model provides a test device of shield pushing resistance in measurement expansibility stratum, includes shield shell and data acquisition appearance, the shield shell is double-deck thin wall metal structure, and the top and the bottom of shield shell are provided with the sealing washer respectively, the shield shell comprises shield inlayer shell and shield skin shell, be provided with a plurality of resistance strain gauges on the shield inlayer shell outer wall, the below of shield shell is provided with automatic hydraulic jack, automatic hydraulic jack's top output is connected with the base, the base is built-in the shield inlayer shell, and the base slides from top to bottom in the shield inlayer shell, has placed expansibility soft rock sample on the base to still be provided with pressure sensor between base and the expansibility soft rock sample of its top, by the data line that resistance strain gauges and pressure sensor's signal output part draw out is external in the input of data acquisition appearance.
In a preferred technical scheme, the shield shell structure further comprises a base, wherein fixing brackets are respectively arranged at two sides of the top of the base, two sides of the shield shell are respectively and fixedly arranged on the fixing brackets at two sides, and the shield shell is arranged above the base in an overhead mode.
In a preferred technical scheme, the automatic hydraulic jack is placed on the base, and a piston rod arranged at the top output end of the automatic hydraulic jack is fixedly connected with the base above.
In a preferred technical scheme, the base is disc-shaped, the base is made of organic glass, the diameter of the base is smaller than that of the shield inner shell, a protruding groove is formed in the bottom surface of the base, and the top end of the piston rod is inserted into the groove.
In a preferred technical scheme, the sealing ring is of an annular structure, and the inner shield shell and the outer shield shell are closed and connected into a whole through the sealing ring.
In a preferred technical scheme, the sealing ring is made of rubber, and a hole for the data wire to pass through is formed in the sealing ring at the lower part.
In a preferred technical scheme, the shield inner shell and the shield outer shell are both hard round steel cylinders, and the shield inner shell and the shield outer shell are kept coaxially arranged.
In a preferred technical scheme, the expansive soft rock sample is cylindrical with a smooth surface, and the height of the expansive soft rock sample is not more than half of the height of the shield shell.
The beneficial effects of the invention are as follows:
1. the relative relation between the shield shell and the expansive soft rock sample is optimized, the trouble that a hole is formed in a large-size rock for testing is avoided, the model is simpler, and the sensor arrangement and monitoring are more convenient.
2. The shield shell adopts a double-layer thin-wall metal structure, and a resistance strain gauge is stuck on the outer wall of the inner metal according to test requirements and is used for monitoring radial force born by the shield shell in the test process.
3. The shield pushing action is realized by pushing the expansive soft rock sample to rise through an automatic hydraulic jack arranged at the bottom of the expansive soft rock sample, and the automatic hydraulic jack can provide rated lifting rate; the pressure sensor is arranged between the expansion soft rock sample and the base, so that the measurement of the forward resistance in the test can be realized, in the test, the numerical value of the pressure sensor is read through the data acquisition instrument, and the change of the forward resistance caused by the change of the lateral expansion amount can be indirectly obtained through conversion, so that the corresponding rule is obtained.
4. The shield pushing action is realized by pushing the expansive soft rock sample to rise through an automatic hydraulic jack arranged at the bottom. An automatic hydraulic jack may provide a nominal lifting rate.
5. The fixed support is connected with the outer wall of the shield shell and is connected with the base, so that the whole set of model device is kept stable in the test process.
Drawings
Fig. 1 is a schematic structural diagram of a resistance test device according to the present invention.
In the figure: 1. an expansive soft rock sample; 2. a shield inner shell; 3. a shield outer shell; 4. a seal ring; 5. resistance strain gauge; 6. a pressure sensor; 7. a base; 8. an automatic hydraulic jack; 9. a data acquisition instrument; 10. a fixed bracket; 11. a base; 12. and a data line.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
In this embodiment, referring to fig. 1, a test device for measuring shield propulsion resistance in an expansive rock stratum includes a shield shell and a data acquisition instrument 9, the shield shell is of a double-layer thin-wall metal structure, the top and the bottom of the shield shell are respectively provided with a sealing ring 4, the shield shell is composed of a shield inner layer shell 2 and a shield outer layer shell 3, the shield inner layer shell 2 and the shield outer layer shell 3 are both hard round steel cylinders, and the shield inner layer shell 2 and the shield outer layer shell 3 are equal in height, and in addition, the shield inner layer shell 2 and the shield outer layer shell 3 are kept coaxially. The sealing ring 4 is of an annular structure, the sealing ring 4 is made of rubber, and the shield inner shell 2 and the shield outer shell 3 are closed and connected into a whole through the sealing ring 4.
The outer wall of the shield inner layer shell 2 is stuck with a plurality of resistance strain gauges 5, the shield shell adopts a double-layer thin-wall metal structure, and the resistance strain gauges 5 are stuck on the outer wall of the shield inner layer shell 2 according to test requirements and are used for monitoring radial force born by the shield shell in the test process.
The below of shield shell is provided with automatic hydraulic jack 8, and automatic hydraulic jack 8's top output is connected with base 7, and base 7 is the disc, and base 7's material is organic glass, and the diameter of base 7 is slightly less than the diameter of shield inlayer shell 2, and base 7 is built-in shield inlayer shell 2, and base 7 slides from top to bottom in shield inlayer shell 2, and the bottom surface of base 7 is provided with outstanding recess, and the top of the piston rod that automatic hydraulic jack 8 top output set up is pegged graft in this recess.
In addition, as shown in fig. 1, the automatic hydraulic jack 8 is placed on the base 11, a fixed support 10 is respectively arranged on two sides of the top of the base 11, two sides of the shield shell are respectively and fixedly installed on the fixed supports 10 on two sides, the shield shell is arranged above the base 11 in an overhead mode, and a piston rod arranged at the top output end of the automatic hydraulic jack 8 is fixedly connected with the base 7 above. The fixing bracket 10 is used for connecting and stabilizing the shield shell. The base 11 may serve to stabilize the whole set of model devices, and the fixing support 10 is connected to the base 11 so that the whole set of model devices remains stable during the test.
The base 7 is provided with an expandable soft rock sample 1, the expandable soft rock sample 1 is cylindrical with a smooth surface, and the height of the expandable soft rock sample 1 is not more than half of the height of the shield shell, wherein the height of the expandable soft rock sample 1 is preferably about half of the height of the shield shell. The expandable soft rock sample 1 is placed in the shield shell, a pressure sensor 6 is further arranged between the base 7 and the expandable soft rock sample 1 above the base, and a data line 12 led out from the signal output end of the resistance strain gauge 5 and the pressure sensor 6 is externally connected to the input end of the data acquisition instrument 9. In addition, a hole for the data line 12 to pass through is formed in the lower seal ring 4. The data acquisition instrument 9 is used for acquiring the values of all the pressure sensors 6 and the resistance strain gauges 5.
The test preparation needs to be carried out before the test, which comprises the following steps:
s1, manufacturing an expansive soft rock sample 1, and placing the expansive soft rock sample 1 in water for a certain time;
s2, connecting the base 7 with a piston rod arranged at the top output end of the automatic hydraulic jack 8, and then placing the base on the base 11;
s3, sticking a resistance strain gauge 5 on the outer wall of the shield inner layer shell 2, sleeving and assembling the shield outer layer shell 3, penetrating the data wire 12 of the pressure sensor 6 and the resistance strain gauge 5 out of the hole of the sealing ring 4 at the lower part, and connecting the data wire with an external data acquisition instrument 9;
s4, placing the immersed expansive soft rock sample 1 on the base 7 in the shield shell, sleeving the shield shell on the outer side of the expansive soft rock sample 1, and adjusting the position so that the fixing support 10 can be matched with the bolt hole of the base 11.
The test process comprises the following steps:
s1, placing the whole test device in a wet environment;
s2, setting an automatic hydraulic jack 8 to lift the expandable soft rock sample 1 at a certain speed, and synchronously collecting data of the pressure sensor 6 and the resistance strain gauge 5.
The swelling soft rock sample 1 can be installed for testing after being soaked in water for a certain time, and the whole set of testing device can be placed in an environment with certain humidity for testing, and the wet environment is favorable for simulating actual working conditions.
The shield pushing action is realized by pushing the expandable soft rock sample 1 to rise through an automatic hydraulic jack 8 arranged at the bottom. The automatic hydraulic jack 8 may provide a nominal lifting rate. The pressure sensor 6 is arranged between the expandable soft rock sample 1 and the base 7, so that the forward resistance can be measured in the test, the numerical value of the pressure sensor 6 is read through the data acquisition instrument 9, and the change of the forward resistance caused by the change of the lateral expansion amount can be indirectly obtained through conversion, so that the corresponding rule is obtained.
The lateral expansion resistance of surrounding rock expansion on the shield shell under different soaking time, expansion time, humidity and jacking (simulated tunneling speed) speed can be obtained through uninterrupted reading of a computer, and the purpose of measuring the shield propulsion resistance in the expandable stratum is achieved.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (5)
1. The utility model provides a test device of shield pushing resistance in measurement expansibility stratum, its characterized in that, including shield shell and data acquisition appearance (9), the shield shell is double-deck thin wall metal structure, and the top and the bottom of shield shell are provided with sealing washer (4) respectively, the shield shell comprises shield inlayer shell (2) and shield skin shell (3), be provided with a plurality of resistance strain gauge (5) on shield inlayer shell (2) outer wall, the below of shield shell is provided with automatic hydraulic jack (8), the top output of automatic hydraulic jack (8) is connected with base (7), base (7) are built-in shield inlayer shell (2), and base (7) slide from top to bottom in shield inlayer shell (2), place expansibility soft rock sample (1) on base (7) to still be provided with pressure sensor (6) between expansibility soft rock sample (1) of base (7) and top, by data line (12) of resistance strain gauge (5) and pressure sensor (6) draw-out in data input end in data acquisition appearance (9).
2. The test device for measuring the shield propulsion resistance in the expandable rock stratum according to claim 1, further comprising a base (11), wherein fixing supports (10) are respectively arranged on two sides of the top of the base (11), two sides of the shield shell are respectively fixedly arranged on the fixing supports (10) on two sides, and the shield shell is arranged above the base (11) in an overhead mode.
3. The test device for measuring shield propulsion resistance in an expandable rock stratum according to claim 2, wherein the automatic hydraulic jack (8) is placed on a base (11), and a piston rod arranged at the top output end of the automatic hydraulic jack (8) is fixedly connected with a base (7) above.
4. A test device for measuring shield thrust resistance in an expandable rock according to claim 3, wherein the base (7) is disc-shaped, the bottom surface of the base (7) is provided with a protruding groove, and the top end of the piston rod is inserted into the groove.
5. The test device for measuring shield thrust resistance in an expandable rock stratum according to claim 1, wherein the sealing ring (4) is of an annular structure, and the inner shield shell (2) and the outer shield shell (3) are closed and connected into a whole through the sealing ring (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311509145.XA CN117589350A (en) | 2023-11-14 | 2023-11-14 | Test device for measuring shield propulsion resistance in expandable rock stratum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311509145.XA CN117589350A (en) | 2023-11-14 | 2023-11-14 | Test device for measuring shield propulsion resistance in expandable rock stratum |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117589350A true CN117589350A (en) | 2024-02-23 |
Family
ID=89917478
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311509145.XA Pending CN117589350A (en) | 2023-11-14 | 2023-11-14 | Test device for measuring shield propulsion resistance in expandable rock stratum |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117589350A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62118240A (en) * | 1985-11-18 | 1987-05-29 | Matsushita Electric Works Ltd | Friction characteristic measuring instrument for plastic material |
| CN105928643A (en) * | 2016-04-26 | 2016-09-07 | 西南科技大学 | Bentonite two-way swelling force measuring instrument |
| CN107764733A (en) * | 2017-11-06 | 2018-03-06 | 中建局集团建设发展有限公司 | The high-rise pumping method of pipe friction test device and concrete |
| RU2671384C1 (en) * | 2018-01-29 | 2018-10-30 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Рыбинский государственный авиационный технический университет имени П.А. Соловьева" | Method for determining of friction coefficient for plastic deformation and device for its implementation |
| CN113324899A (en) * | 2021-05-12 | 2021-08-31 | 中国石油大学(华东) | Experimental device and method for measuring friction performance of soil body and guide pipe in high-stress consolidation state |
| CN116819007A (en) * | 2023-06-30 | 2023-09-29 | 华北科技学院(中国煤矿安全技术培训中心) | Test system and method for testing expansion pressure and expansion deformation in pipe |
-
2023
- 2023-11-14 CN CN202311509145.XA patent/CN117589350A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62118240A (en) * | 1985-11-18 | 1987-05-29 | Matsushita Electric Works Ltd | Friction characteristic measuring instrument for plastic material |
| CN105928643A (en) * | 2016-04-26 | 2016-09-07 | 西南科技大学 | Bentonite two-way swelling force measuring instrument |
| CN107764733A (en) * | 2017-11-06 | 2018-03-06 | 中建局集团建设发展有限公司 | The high-rise pumping method of pipe friction test device and concrete |
| RU2671384C1 (en) * | 2018-01-29 | 2018-10-30 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Рыбинский государственный авиационный технический университет имени П.А. Соловьева" | Method for determining of friction coefficient for plastic deformation and device for its implementation |
| CN113324899A (en) * | 2021-05-12 | 2021-08-31 | 中国石油大学(华东) | Experimental device and method for measuring friction performance of soil body and guide pipe in high-stress consolidation state |
| CN116819007A (en) * | 2023-06-30 | 2023-09-29 | 华北科技学院(中国煤矿安全技术培训中心) | Test system and method for testing expansion pressure and expansion deformation in pipe |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100570070C (en) | The method of testing of geotechnical engineering original position rotation contact-surveying and special equipment thereof | |
| ASTM Subcommittee 18.02 | Suggested method for performing the flat dilatometer test | |
| CN111206627B (en) | Centrifugal model test device and method for influencing existing pile foundation by tunnel-foundation pit multiple excavation | |
| CN104142388B (en) | Original position static(al) press-in test method in boring | |
| CN110529127A (en) | A kind of the shield driving experimental rig and method of simulated formation protuberance | |
| Withers et al. | The development of a full displacement pressuremeter | |
| CN105181199A (en) | Side hole stress releasing method of ground stress test | |
| CN200971493Y (en) | Self-drill in-situ friction shearing instrument | |
| CN115341589A (en) | Pile foundation bearing characteristic test device considering high stratum stress influence and using method | |
| CN210720389U (en) | Tunnel excavation process analogue test device | |
| CN117589350A (en) | Test device for measuring shield propulsion resistance in expandable rock stratum | |
| Aubeny et al. | Effects of disturbance on undrained strengths interpreted from pressuremeter tests | |
| CN209911102U (en) | Triaxial test pressure chamber capable of simulating underground cavern and tunnel excavation unloading and supporting | |
| CN208672223U (en) | A kind of binary channels SERVO CONTROL dynamic pore pressure marking apparatus | |
| CN108168621B (en) | Device for simultaneously measuring water pressure, temperature and mining stress | |
| CN207675554U (en) | A kind of soil pressure in-situ testing device | |
| CN111982779B (en) | Test method for simulating seepage deformation of pressure tunnel by hollow cylindrical rock sample | |
| CN105696600B (en) | A kind of foundation pit supporting method of automatic controlled underground diaphragm wall horizontal displacement | |
| CN115030237A (en) | Double-casing pile negative friction testing device and testing method under silt geology | |
| CN105806544A (en) | Mining random high-voltage lossless optical fiber Bragg grating single prop pressure sensor system | |
| CN201526319U (en) | Full-automatic intelligent drilling elastic modulus tester | |
| CN114062646A (en) | Testing device and testing method for lateral geological exploration in drill hole | |
| CN105781526B (en) | Stress testing device and stress testing method for tubular column of water injection well | |
| CN210742057U (en) | Test device for testing surface tension of air bubbles in air-containing soil sample | |
| CN208563407U (en) | The in due course test device of Deep Plate Load Test |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |