CN115326664B - Full-scale test method for impervious capacity of mine-method assembled upward arch circumferential seam - Google Patents
Full-scale test method for impervious capacity of mine-method assembled upward arch circumferential seam Download PDFInfo
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- CN115326664B CN115326664B CN202210730096.1A CN202210730096A CN115326664B CN 115326664 B CN115326664 B CN 115326664B CN 202210730096 A CN202210730096 A CN 202210730096A CN 115326664 B CN115326664 B CN 115326664B
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000010998 test method Methods 0.000 title claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 62
- 238000012360 testing method Methods 0.000 claims abstract description 29
- 230000003487 anti-permeability effect Effects 0.000 claims abstract description 19
- 238000007789 sealing Methods 0.000 claims abstract description 13
- 238000005259 measurement Methods 0.000 claims description 6
- 230000035699 permeability Effects 0.000 claims description 3
- 239000004575 stone Substances 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000000149 penetrating effect Effects 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
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
- G01N15/0826—Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/0806—Details, e.g. sample holders, mounting samples for testing
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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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- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Fluid Mechanics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Examining Or Testing Airtightness (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a mine method assembled type full-scale test method for the anti-permeability capability of an upward circumferential joint, which comprises the steps of firstly, sealing the periphery of an inverted arch block by adopting concrete after the inverted arch block is assembled and is longitudinally tensioned; then, embedding a high-pressure water pipe and a pressure measuring pipe at the bottom of the inverted arch block, connecting a water pressure gauge to the pressure measuring pipe, connecting the high-pressure water pipe to a grouting pump, generating bottom water pressure by the grouting pump through the high-pressure water pipe, and measuring the water pressure by the water pressure gauge on the pressure measuring pipe; finally, after the bottom water pressure is generated, recording the water pressure when the circumferential joint leaks, and taking the water pressure value as the seepage resistance of the circumferential joint; changing longitudinal tension force of the inverted arch block, testing impervious capacity of the circumferential joint under different tension forces, drawing a relation curve of the impervious capacity of the circumferential joint and the longitudinal tension force, and evaluating the impervious capacity of the circumferential joint of the inverted arch block. The invention overcomes the difficult problem of difficult on-site impermeability test and has the advantages of simplicity, practicability and low cost.
Description
Technical Field
The invention relates to the technical field of anti-seepage design of a circumferential joint of an upward arch block, in particular to a full-scale test method for anti-seepage capability of the circumferential joint of the upward arch block assembled by a mining method.
Background
Compared with the traditional tunnel inverted arch construction method, the assembled inverted arch has many advantages, such as high construction speed, early bearing resistance and the like, and conforms to the concept of 'quick closing' of a tunnel. However, there are also disadvantages, such as multiple circumferential seams between inverted arch blocks, and improper treatment may cause problems such as water seepage. Therefore, the method for testing the circumferential impermeability of the assembled elevation arch blocks is particularly important, and no suitable testing method exists at present.
Disclosure of Invention
The invention aims to provide a mine method assembled type full-scale test method for the anti-permeability capability of a face-up arch circumferential joint, which can realize the full-scale anti-permeability capability test of the face-up arch circumferential joint, quickly establish a relation curve between longitudinal tension and anti-permeability capability of the face-up arch circumferential joint, determine the anti-permeability capability of the face-up arch circumferential joint under the action of different longitudinal tension, overcome the difficult problem of field anti-permeability capability test, and has the advantages of simplicity, practicability and low cost under the condition of meeting the full-scale test.
In order to achieve the above object, the present invention provides the following solutions:
a mine method assembled upward arch circumferential seam impermeability full-scale test method comprises the following steps:
s1, after the inverted arch blocks are assembled and tensioned longitudinally, sealing the periphery of the inverted arch blocks by adopting concrete;
s2, burying a high-pressure water pipe and a pressure measuring pipe at the bottom of the inverted arch block, connecting a water pressure gauge to the pressure measuring pipe, connecting the high-pressure water pipe to a grouting pump, generating bottom water pressure by the grouting pump through the high-pressure water pipe, and measuring the water pressure by the water pressure gauge on the pressure measuring pipe;
s3, after the bottom water pressure is generated, recording the water pressure when the circumferential joint leaks, and taking the water pressure value as the seepage resistance of the circumferential joint;
s4, changing longitudinal tension force of the inverted arch block, repeating the steps S1-S3, testing impervious capacity of the circumferential joint under different tension forces, drawing a relation curve of the impervious capacity of the circumferential joint and the longitudinal tension force, and evaluating the impervious capacity of the circumferential joint of the inverted arch block.
Description
Further, in the step S1, concrete is used to seal the periphery of the inverted arch block, which specifically includes:
c20 fine stone concrete with slump of 150-160 mm is adopted to seal the ends and two sides of the inverted arch.
Further, the thickness of the concrete sealing layer formed by sealing was 50cm.
Further, in the step S2, each measurement uses 1 pressure value of the grouting pump, and the pressure of the grouting pump is changed to perform multiple measurements until the measurement is completed.
Further, in the step S1, a longitudinal tensioning device is used to achieve longitudinal tensioning of the camber block.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects: the full-scale test method for the impervious capacity of the assembled type overhead arch circumferential joint mainly comprises the steps of performing closed treatment on the periphery of the overhead arch after the assembly and the tensioning of the overhead arch, generating and testing bottom water pressure, performing the impervious capacity test on the circumferential joint, and performing the longitudinal tensioning after the assembly of the overhead arch, pre-burying a high-pressure water pipe at the bottom of the overhead arch, sealing the periphery by adopting concrete with good fluidity, providing water injection pressure by a grouting pump, better realizing the full-scale impervious capacity test of the overhead arch circumferential joint, establishing a relation curve between the tensioning force and the impervious capacity of the overhead arch circumferential joint, determining the impervious capacity of the overhead arch circumferential joint, overcoming the difficult problem of the on-site impervious capacity test, and providing reference for the circumferential impervious capacity design of the overhead arch.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is an elevation view of a full scale test of the permeability resistance of an assembled elevation arch circumferential seam of a mining method according to an embodiment of the present invention;
FIG. 2 is a plan view of a full-scale test of the permeability resistance of an assembled elevation arch circumferential seam of the mine method according to an embodiment of the present invention;
reference numerals illustrate: 1. a concrete sealing layer; 2. a longitudinal tensioning device; 3. a hoisting hole; 4. a pressure measuring tube; 5. a high pressure water pipe; 6. the direction of the water flow; 7. a grouting pump; 8. a water pressure gauge.
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. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention aims to provide a mine method assembled type full-scale test method for the anti-permeability capability of a face-up arch circumferential joint, which can realize the full-scale anti-permeability capability test of the face-up arch circumferential joint, quickly establish a relation curve between longitudinal tension and anti-permeability capability of the face-up arch circumferential joint, determine the anti-permeability capability of the face-up arch circumferential joint under the action of different longitudinal tension, overcome the difficult problem of field anti-permeability capability test, and has the advantages of simplicity, practicability and low cost under the condition of meeting the full-scale test.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
As shown in fig. 1 to 2, the full-scale test method for the impervious capacity of the mine assembled type upward arch circumferential seam provided by the invention comprises the following steps:
s1, performing inverted arch block assembly and tensioning, and performing four-edge sealing measures on the inverted arch block: after the inverted arch blocks are assembled and longitudinally tensioned, the periphery of the inverted arch blocks are sealed by adopting concrete, and specifically, the inverted arch ends and the two sides are sealed by adopting C20 fine stone concrete with slump of 150-160 mm; the thickness of the concrete sealing layer formed in a sealing way is 50cm;
s2, bottom water pressure generation and test: embedding a high-pressure water pipe 5 and a pressure measuring pipe 4 at the bottom of the inverted arch block, connecting a water pressure gauge 8 (or a water pressure gauge) to the pressure measuring pipe 4, connecting the high-pressure water pipe 5 to a grouting pump 7, generating bottom water pressure by the grouting pump 7 through the high-pressure water pipe 5, and measuring the water pressure by the water pressure gauge 8 (or the water pressure gauge) on the pressure measuring pipe 4 along the water flow direction 6 as shown in fig. 2; each test uses 1 grouting pump pressure value, and keeps until the test is completed, and multiple tests can be performed by changing the grouting pump 7 pressure.
S3, testing the impervious capacity of the circumferential joint: after the bottom water pressure is generated, recording the water pressure when the circumferential joint leaks water, and taking the water pressure value as the impermeability of the circumferential joint;
s4, changing longitudinal tension force of the inverted arch block, repeating the steps S1-S3, testing impervious capacity of the circumferential joint under different tension forces, drawing a relation curve of the impervious capacity of the circumferential joint and the longitudinal tension force, and evaluating the impervious capacity of the circumferential joint of the inverted arch block.
In step S1, longitudinal tensioning of the tilting arch is achieved by using a longitudinal tensioning device 2. The overhead arch block is provided with a lifting hole 3, and the overhead arch block is lifted in the tunnel through the lifting hole 3. The longitudinal tensioning device 2 comprises prestressed screw-thread steel bars penetrating through the upward arch blocks and connectors for connecting the two sections of prestressed screw-thread steel bars.
In summary, the full-scale test method for the anti-permeability capability of the assembled type overhead arch circumferential seam of the mine method mainly comprises the steps of performing an inverted arch block circumferential sealing measure after assembly and tensioning of the inverted arch block, performing bottom water pressure generation and testing, performing an annular seam anti-permeability capability test 3 part, performing pre-burying a high-pressure water pipe at the bottom of the inverted arch after the inverted arch is assembled and tensioned longitudinally, sealing the circumference by adopting concrete with good fluidity, better realizing the inverted arch block circumferential seam full-scale anti-permeability capability test in a mode of providing water injection pressure through a grouting pump, establishing a relation curve between tension and the inverted arch block circumferential seam anti-permeability capability, determining the anti-permeability capability of the inverted arch block circumferential seam, overcoming the difficult problem of on-site anti-permeability capability test, and providing reference for the design of the inverted arch block circumferential seam.
The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to assist in understanding the methods of the present invention and the core ideas thereof; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (5)
1. A mine method assembled upward arch circumferential joint impermeability full-scale test method is characterized by comprising the following steps:
s1, after the inverted arch blocks are assembled and tensioned longitudinally, sealing the periphery of the inverted arch blocks by adopting concrete;
s2, burying a high-pressure water pipe and a pressure measuring pipe at the bottom of the inverted arch block, connecting a water pressure gauge to the pressure measuring pipe, connecting the high-pressure water pipe to a grouting pump, generating bottom water pressure by the grouting pump through the high-pressure water pipe, and measuring the water pressure by the water pressure gauge on the pressure measuring pipe; the water flow paths of the embedded high-pressure water pipes and the pressure measuring pipes are perpendicular to the annular joints of the inverted arch blocks, the high-pressure water pipes and the pressure measuring pipes are embedded in the bottoms of the assembled inverted arches, the positions of the high-pressure water pipes and the pressure measuring pipes after the inverted arches are assembled are matched and communicated with each other, and the water pressure gauge is connected to the water outlet end of the pressure measuring pipe to measure the water pressure change in the pressure measuring pipes;
s3, after the bottom water pressure is generated, recording the water pressure when the circumferential joint leaks, and taking the water pressure value as the seepage resistance of the circumferential joint;
s4, changing longitudinal tension force of the inverted arch block, repeating the steps S1-S3, testing impervious capacity of the circumferential joint under different tension forces, drawing a relation curve of the impervious capacity of the circumferential joint and the longitudinal tension force, and evaluating the impervious capacity of the circumferential joint of the inverted arch block.
2. The full-scale test method for the anti-permeability capability of the assembled type upward arch circumferential seam by the mine method according to claim 1, wherein in the step S1, concrete is adopted to seal the periphery of the inverted arch block, and the method specifically comprises the following steps:
c20 fine stone concrete with slump of 150-160 mm is adopted to seal the ends and two sides of the inverted arch.
3. The mine-fabricated arch circumferential seam permeability resistance full-scale test method according to claim 2, wherein the thickness of the closed formed concrete sealing layer is 50cm.
4. The method for full-scale test of the anti-permeability of the assembled back arch circumferential seam according to claim 1, wherein in the step S2, each measurement is performed by using 1 grouting pump pressure value, and the pressure of the grouting pump is changed for a plurality of measurements until the measurement is completed.
5. The full-scale test method for the impervious capacity of the mine-method assembled type upward arch circumferential seam according to claim 1, wherein in the step S1, a longitudinal tensioning device is adopted to realize longitudinal tensioning of the upward arch blocks.
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| CN202210730096.1A CN115326664B (en) | 2022-06-24 | 2022-06-24 | Full-scale test method for impervious capacity of mine-method assembled upward arch circumferential seam |
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| CN202210730096.1A CN115326664B (en) | 2022-06-24 | 2022-06-24 | Full-scale test method for impervious capacity of mine-method assembled upward arch circumferential seam |
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| CN115326664B true CN115326664B (en) | 2023-06-20 |
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