CN116359022A - Simulation device for detecting joint strength of pipe sheet in tunnel - Google Patents
Simulation device for detecting joint strength of pipe sheet in tunnel Download PDFInfo
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- CN116359022A CN116359022A CN202310080553.1A CN202310080553A CN116359022A CN 116359022 A CN116359022 A CN 116359022A CN 202310080553 A CN202310080553 A CN 202310080553A CN 116359022 A CN116359022 A CN 116359022A
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- thrust
- pipe sheet
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- joint strength
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- 238000004088 simulation Methods 0.000 title claims abstract description 9
- 230000001105 regulatory effect Effects 0.000 claims abstract description 4
- 239000010687 lubricating oil Substances 0.000 claims description 4
- 238000005452 bending Methods 0.000 abstract description 2
- 238000010008 shearing Methods 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 7
- 238000001514 detection method Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0044—Pneumatic means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/0202—Control of the test
- G01N2203/0212—Theories, calculations
- G01N2203/0218—Calculations based on experimental data
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0274—Tubular or ring-shaped specimens
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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
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a simulation device for detecting the joint strength of a pipe sheet in a tunnel, which comprises a pipe sheet with a joint, wherein at least two groups of downward pressing thrust devices are loaded on the arc-shaped end face of the pipe sheet, a group of horizontal pressing thrust devices are respectively loaded on the outer sides of the left end and the right end of the pipe sheet, each group of thrust devices consists of an S-shaped thrust sensor connected with a cylindrical air cylinder through a bolt and controlled by an air pump and a pressure regulating valve, and a thrust rod connected with the S-shaped thrust sensor through a bolt, the other end of the cylindrical air cylinder penetrates through a hole in the middle of a support fixedly arranged on a loading platform to be supported, and a rod body of the thrust rod is positioned and arranged through a positioning groove fixedly arranged on the loading platform. The invention well solves the problem of servo loading, and can calculate the actual bending moment and shearing force of the joint part of the pipe sheet through simple stress analysis.
Description
Technical Field
The invention relates to the field of pipeline construction, in particular to a simulation device for detecting the joint strength of a pipe sheet in a tunnel.
Background
In recent years, with the vigorous development of the economy of China, the national urbanization process is developed at a high speed, and China becomes the country with the largest tunnel construction rule, the fastest development and the highest construction difficulty in the world. However, because soil layers in different areas are distributed in a complex manner, geological conditions are various, meanwhile, construction may have defects, safety accidents are likely to occur in the construction period and the operation period of an underground structure, once the underground engineering has accidents in the construction and use processes, great damage to the engineering and surrounding structures is inevitable, and meanwhile, great threat is also caused to life and property safety of people.
The shield all tunnels are fully mechanized construction tunnels constructed by a hidden excavation method and are formed by splicing concrete pipe sheets, but the splicing structure can lead to discontinuous and uneven strength and rigidity of tunnel joints, and weak joint parts, and can lead to domino type ring-by-ring continuous damage along the length direction of the tunnel under the condition that local pipe sheets are damaged, so that the mechanism of researching how the tunnels evolve into continuous damage disaster phenomena under the condition of local damage is necessary through indoor tests, and the joints are used as weak positions of the whole structure of the tunnel, and the accurate measurement of the strength is also crucial.
At present, the common tunnel segment joint strength detection device is used for detecting the original size serving as a test object, the size is overlarge, and no good strength detection device exists for the tunnel model segment with a small scale.
Disclosure of Invention
In order to overcome the defects in the prior art, the detection device capable of accurately measuring the ultimate strength of the tunnel joint in an indoor test is provided. The simulation device for detecting the joint strength of the inner pipe piece of the tunnel can only be used for detecting the strength of the joint of the tunnel pipe piece with a large scale, but cannot be used for detecting the joint strength of the tunnel pipe piece with a small scale (the geometric similarity ratio is 10/15/20 … …).
The invention aims at realizing the following technical scheme:
the utility model provides a simulator for detecting tunnel inner tube piece joint strength, includes the section of jurisdiction that contains the pin joint, on the arc terminal surface of section of jurisdiction, the loading has the thrust device that two sets of downward pressures, the outside at both ends about the section of jurisdiction is loaded with a set of thrust device that the level was exerted pressure respectively, every thrust device of group comprises the S type thrust sensor of the cylinder bolted connection who passes through air pump connection air-vent valve control, and S type thrust sensor bolted connection' S distance rod, the other end of cylinder passes the fixed hole in the middle part of the support that sets up on the loading platform and supports the setting, the body of rod of distance rod is fixed through the constant head tank that sets up on the loading platform and is fixed in position setting.
The S-shaped thrust sensor is also connected with the acquisition instrument.
The end of the thrust rod is provided with a slope surface which is matched with the radian of the end face of the pipe piece.
The positioning groove is formed by two T-shaped stop blocks with the same structure, and one sides of the planes of the T-shaped stop blocks are correspondingly arranged.
Lubricating oil is smeared on the rod body of the thrust rod and in the groove of the positioning groove.
The support, the positioning groove and the loading platform are in welded connection.
The invention has the beneficial effects that:
1. the problem of servo loading can be well solved by means of cylinder pressurization, and the applied thrust can be ensured to be in a fixed numerical range.
2. And positioning and loading the tunnel model segment by fixing 4 points in the longitudinal direction and the horizontal direction, and calculating the actual bending moment and shearing force of the joint part of the segment through simple stress analysis.
3. The cylinder with a longer stroke is selected, so that the loading of tunnel model segments with different scales can be met.
4. The thrust rod end is arranged to be a slope surface, and a lubricating oil layer is coated on the thrust rod and the positioning groove, so that the influence caused by friction force can be effectively reduced.
5. The device design scheme can eliminate the influence caused by the dead weight of the duct piece and can improve the calculation precision.
6. Each cylinder is correspondingly connected with an S-shaped sensor, and the S-shaped sensor is connected with a collector, so that the actual stress of each loading point can be accurately measured.
Drawings
FIG. 1 is a schematic view of a segment assembly structure of the present invention;
FIG. 2 is a schematic view of a segment loading thrust device according to the present invention;
FIG. 3 is a schematic diagram of a loading platform structure according to the present invention;
fig. 4 is an enlarged schematic view of the thrust device of fig. 2.
Reference numerals: 1 segment 2 segment joint 3 constant head tank 4 support 5 drum type cylinder 6S formula thrust transducer 7 thrust rod 8 round hole 9 loading platform
Detailed Description
The invention is further described below with reference to the accompanying drawings:
the invention discloses a simulation device for detecting the joint strength of a pipe sheet in a tunnel, which is shown in figures 1-4, and comprises a pipe sheet 1 with a splicing head 2, wherein at least two groups of downward pressing thrust devices are loaded on the arc-shaped end face of the pipe sheet 1, a group of horizontal pressing thrust devices are respectively loaded on the outer sides of the left end and the right end of the pipe sheet 1, each group of thrust devices consists of an S-shaped thrust sensor 6 which is connected with a cylindrical air cylinder 5 through a gas pump and is controlled by a pressure regulating valve in a connecting mode, and a thrust rod 7 which is connected with the S-shaped thrust sensor 6 in a bolt mode, and the end head of the thrust rod 7 is arranged to be a slope face which is matched with the radian of the end face of the pipe sheet 1, so that the end head of the thrust rod 7 is tightly attached with the end face of the pipe sheet 1; the other end of the cylindrical air cylinder 5 passes through a hole 8 in the middle of a bracket 4 fixedly arranged on a loading platform 9 to be supported and arranged, the rod body of the thrust rod 7 is positioned and arranged through a positioning groove 3 fixedly arranged on the loading platform 9, and the positioning groove 3 is formed by two T-shaped stop blocks with the same structure, and one side of the plane of the T-shaped stop blocks is correspondingly arranged; in order to reduce the influence caused by friction force, lubricating oil is smeared on the rod body of the thrust rod 7 and in the groove of the positioning groove 3; the device is characterized in that the bracket 4, the positioning groove 3 and the loading platform 9 are welded.
The detection principle and method of the invention are as follows:
referring to fig. 1, for detecting the joint strength of a tunnel segment, the invention adopts a simplest method of selecting two spliced segments as detection objects, and a tunnel model segment is formed by splicing two segments with an angle of 67.5 degrees according to actual engineering angles; the loading state of the duct pieces can be known through the figure 2, horizontal load is applied to the left end and the right end of each duct piece, vertical load is applied to the upper end face of each duct piece, the pressurization of the air cylinder is controlled through the air pump connected with the pressure regulating valve, an air pipe with the diameter of 8mm is adopted, an S-shaped sensor is arranged at the action point of the air cylinder and the duct pieces, the sensor is connected with the acquisition instrument, and the intensity calculation formula of the joint part can be simply listed by detecting the force applied by the air cylinder on the duct pieces in real time through the acquisition instrument; fig. 3 is a structural diagram of a loading platform for detecting the strength of a tunnel model segment joint.
The main thrust of exerting around the cylinder of this scheme works, finishes the back with intensity detection device installation, opens the size of gathering appearance record initial effort, opens the air pump pressurization after the record finishes, adjusts the size of every cylinder pressure through the air-vent valve, observes the numerical value of gathering appearance, stops adjusting the air-vent valve when effort reaches expected numerical value, observes the section of jurisdiction joint and takes place to destroy to obtain complete experimental testing result.
Claims (6)
1. A simulator for detecting tunnel inner pipe piece joint strength, including section of jurisdiction (1) that contains concatenation (2), its characterized in that: the pipe piece (1) is provided with at least two groups of downward pressing thrust devices on the arc-shaped end face, a group of horizontal pressing thrust devices are respectively loaded on the outer sides of the left end and the right end of the pipe piece (1), each group of thrust devices is composed of an S-shaped thrust sensor (6) connected with a cylinder type air cylinder (5) through a gas pump and controlled by a pressure regulating valve through a bolt, and a thrust rod (7) connected with the S-shaped thrust sensor (6) through a bolt, the other end of the cylinder type air cylinder (5) penetrates through a hole (8) in the middle of a support (4) fixedly arranged on a loading platform (9) to be supported, and a rod body of the thrust rod (7) is positioned through a positioning groove (3) fixedly arranged on the loading platform (9).
2. A simulation device for detecting the joint strength of a pipe sheet in a tunnel according to claim 1, characterized in that the S-shaped thrust sensor (6) is also connected with a collector.
3. The simulator for detecting the joint strength of the pipe sheet in the tunnel according to claim 1, wherein the end head of the thrust rod (7) is provided with a slope surface which is matched with the radian of the end face of the pipe sheet (1).
4. The simulation device for detecting the joint strength of the pipe sheet in the tunnel according to claim 1, wherein the positioning groove (3) is formed by two T-shaped stop blocks with the same structure, and one side of the plane of each stop block is correspondingly arranged.
5. A simulation device for detecting the joint strength of a pipe piece in a tunnel according to claim 1, characterized in that the rod body of the thrust rod (7) and the groove of the positioning groove (3) are respectively coated with a lubricating oil layer.
6. The simulator for detecting the joint strength of the inner pipe sheet of the tunnel according to claim 1, wherein the support (4), the positioning groove (3) and the loading platform (9) are welded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310080553.1A CN116359022A (en) | 2023-02-08 | 2023-02-08 | Simulation device for detecting joint strength of pipe sheet in tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310080553.1A CN116359022A (en) | 2023-02-08 | 2023-02-08 | Simulation device for detecting joint strength of pipe sheet in tunnel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116359022A true CN116359022A (en) | 2023-06-30 |
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ID=86905846
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310080553.1A Pending CN116359022A (en) | 2023-02-08 | 2023-02-08 | Simulation device for detecting joint strength of pipe sheet in tunnel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116359022A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118462221A (en) * | 2024-07-10 | 2024-08-09 | 中国建筑第六工程局有限公司 | Tunnel shield segment with self-sensing performance and intelligent water seepage early warning method thereof |
-
2023
- 2023-02-08 CN CN202310080553.1A patent/CN116359022A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118462221A (en) * | 2024-07-10 | 2024-08-09 | 中国建筑第六工程局有限公司 | Tunnel shield segment with self-sensing performance and intelligent water seepage early warning method thereof |
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