CN112285766B - Large-scale chamber side wall earthquake transverse wave testing method - Google Patents
Large-scale chamber side wall earthquake transverse wave testing method Download PDFInfo
- Publication number
- CN112285766B CN112285766B CN202011246962.7A CN202011246962A CN112285766B CN 112285766 B CN112285766 B CN 112285766B CN 202011246962 A CN202011246962 A CN 202011246962A CN 112285766 B CN112285766 B CN 112285766B
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- wall surface
- hammering
- side wall
- earthquake
- testing
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- 238000012360 testing method Methods 0.000 title claims abstract description 34
- 238000010008 shearing Methods 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 18
- 238000005553 drilling Methods 0.000 claims abstract description 6
- 239000002023 wood Substances 0.000 claims description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 239000011121 hardwood Substances 0.000 claims description 2
- 230000007547 defect Effects 0.000 abstract description 3
- 239000000853 adhesive Substances 0.000 abstract 2
- 230000001070 adhesive effect Effects 0.000 abstract 2
- 230000005284 excitation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/16—Receiving elements for seismic signals; Arrangements or adaptations of receiving elements
- G01V1/18—Receiving elements, e.g. seismometer, geophone or torque detectors, for localised single point measurements
- G01V1/181—Geophones
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/02—Generating seismic energy
- G01V1/143—Generating seismic energy using mechanical driving means, e.g. motor driven shaft
- G01V1/147—Generating seismic energy using mechanical driving means, e.g. motor driven shaft using impact of dropping masses
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/16—Receiving elements for seismic signals; Arrangements or adaptations of receiving elements
- G01V1/20—Arrangements of receiving elements, e.g. geophone pattern
Abstract
The invention provides a large-scale chamber side wall earthquake transverse wave testing method, which comprises the steps of processing a cuboid hard square, transversely arranging a plurality of rows of grooves on the square wall surface of the square, and arranging a group of expansion bolt holes on the other side of the square wall surface; selecting a hammering wall surface at the position of the transverse wave test area which is not smaller than 1.5m, and drilling a group of expansion bolt holes corresponding to the battens on the hammering wall surface; and (3) filling the shearing-resistant cushion on the hammering wall surface, putting the wooden square adhesive wall surface on the shearing-resistant cushion, contacting the wooden square adhesive wall surface with the shearing-resistant cushion, and the like, so that the defect that the artificial earthquake transverse wave test is carried out on the side wall of the large-scale chamber at the present stage is overcome, the purpose of fixing the wooden board on the side wall can be achieved, and a convenient, fast and reliable method and device are provided for relevant tests.
Description
Technical Field
The invention relates to a method for testing earthquake transverse waves of a side wall of a large-scale cavity, belongs to the technical field of engineering geophysical prospecting, and is suitable for developing earthquake transverse wave tests of the side wall and side slope of the cavity (particularly the large-scale cavity).
Background
In engineering investigation, artificial earthquake transverse waves are often required to be tested on the side walls of the cavern, and two modes of manually exciting the earthquake transverse waves are mainly adopted, one mode is a drilling excitation mode, the other mode is an excitation mode that a drill rod is adopted to prop against the left side wall and the right side wall of the cavern, and a jack is used for pressurizing to provide counter force for the wood board to compress the wood board. But in many cases, the drilling is impossible due to the influence of the test site; for large-scale caverns, the side walls on two sides are far apart, and the counter force can not be provided to enable the wood board to be clung to the side walls, so that the test can not be carried out. Therefore, another method and device for exciting the earthquake transverse wave are needed to complete the test of the earthquake transverse wave of the large-scale chamber.
Disclosure of Invention
In order to solve the technical problems, the invention provides a large-scale chamber side wall earthquake transverse wave testing method, which can make up for the defect that artificial earthquake transverse wave testing is carried out on a large-scale chamber side wall at the present stage, can fix a wood board on the side wall, and provides a convenient and reliable method and device for related testing.
The invention is realized by the following technical scheme.
The invention provides a method for testing earthquake transverse waves of a side wall of a large-scale cavity, which comprises the following steps:
(1) processing a cuboid hard wood block, transversely arranging a plurality of rows of grooves on the wall surface of the wood block, and arranging a group of expansion bolt holes on the other side of the wall surface;
(2) selecting a hammering wall surface at the position of the transverse wave test area which is not smaller than 1.5m, and drilling a group of expansion bolt holes corresponding to the battens on the hammering wall surface;
(3) a shearing-resistant cushion is arranged on the hammering wall surface, the wood square is arranged on the shearing-resistant cushion, and the wood square is contacted with the shearing-resistant cushion by sticking the wall surface of the wood square;
(4) a group of detectors with the interval of 1-2 m are arranged on the central line of the square timber, the detectors are connected with a seismic wave tester through wires, and a synchronous switch line is used for connecting a large hammer with the seismic wave tester;
(5) hammering the right upper part and the right lower part of the timber by using a large hammer, and collecting a right-direction earthquake transverse wave generated by the right upper part and a reverse-direction earthquake transverse wave generated by the right lower part by using a earthquake wave tester and a wave detector;
(6) recording data of the channel earthquake of each detector according to the sequence from near to far, comparing the earthquake transverse waves of the same detector in the forward direction and the reverse direction, and picking up the first arrival time T of the transverse waves i Then the transverse wave first arrival time T of each picked wave detector i Recording is performed in the order from near to far.
The grooves are uniformly formed in the wood wall surface, the grooves are elliptical, the depth of each groove is 3-5 mm, the ratio of the depth of each groove to the width of each groove is 0.7-1.0, and the width of each groove is 3mm.
In the step (2), the hammering wall surface is positioned at the left side or the right side of the transverse wave test area.
In the step (2), the surface of the hammering wall surface needs to be transversely roughened, and the flatness of the hammering wall surface is 3-5 mm.
In the step (3), the battens are aligned with expansion bolt holes of the hammering wall surface, the expansion bolts are inserted into the expansion bolt holes, and the battens Fang Maogu are arranged on the hammering wall surface.
In the step (5), the force directly above and directly below the hammering timber is the same.
The seismic wave tester and the detector form an acquisition system.
In the step (6), the data is recorded in an RSW format, and each channel of seismic record is balanced.
The shearing-resistant cushion is a shearing-resistant fiber or steel wire cushion, and the thickness is 1.5-2 mm.
The transverse wave first arrival time T i Equal to the forward first arrival time T pi And the first arrival time T in the opposite direction Ri Is a mean arithmetic value of (c).
The invention has the beneficial effects that: the method and the device can make up the defect that the artificial earthquake transverse wave test is carried out on the side wall of the large-scale chamber at the present stage, can fix the wood board on the side wall, and provide a convenient and reliable method and device for related tests.
Drawings
FIG. 1 is a schematic illustration of the arrangement of the present invention;
FIG. 2 is a schematic view of the structure of the lumber in FIG. 1;
in the figure: 1-earthquake wave tester, 2-wire, 3-synchronous switch wire, 4-detector, 5-sledge, 6-square, 7-expansion bolt, 8-expansion bolt hole, 9-shearing-resistant pad, 10-hammering wall surface, 11-square wall surface.
Detailed Description
The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the above.
As shown in fig. 1 and 2, a method for testing earthquake transverse waves of a side wall of a large-scale cavity comprises the following steps:
(1) processing a cuboid hard batten 6, transversely arranging a plurality of rows of grooves on a batten wall surface 11 of the batten 6, and arranging a group of expansion bolt holes 8 on the other side;
(2) selecting a hammering wall surface 10 at the position of the transverse wave test area which is not smaller than 1.5m, and drilling a group of expansion bolt holes 8 corresponding to the battens 6 on the hammering wall surface 10;
(3) a shearing resistant cushion 9 is arranged on the hammering wall surface 10, the batten 6 is arranged on the shearing resistant cushion 9, and the batten wall surface 11 of the batten 6 is contacted with the shearing resistant cushion 9;
(4) a group of detectors 4 with the interval of 1-2 m are arranged on the central line of a square timber 6, the detectors 4 are connected with a seismic wave tester 1 through a lead 2, and a synchronous switch line 3 is used for connecting a sledge 5 and the seismic wave tester 1;
(5) hammering is carried out on the right upper part and the right lower part of the square 6 by using a large hammer 5, and the right-direction earthquake transverse wave generated on the right upper part and the opposite-direction earthquake transverse wave generated on the right lower part are collected by using a earthquake wave tester 1 and a wave detector 4;
(6) the data recording is carried out on the channel earthquake of each detector 4 according to the sequence from near to far, the earthquake transverse waves of the same detector 4 in the forward direction and the opposite direction are compared, the transverse wave first arrival time Ti is picked up, and then the transverse wave first arrival time Ti of each picked detector 4 is recorded according to the sequence from near to far.
The grooves are uniformly formed in the wood wall surface 11, the grooves are elliptical, the depth of the grooves is 3-5 mm, the ratio of the depth to the width of the grooves is 0.7-1.0, and the width of the grooves is 3mm.
In the step (2), the hammering wall surface 10 is located at the left side or the right side of the transverse wave test area.
In the step (2), the hammering wall surface 10 is an approximate plane, and the surface of the hammering wall surface 10 needs to be roughened transversely, and the flatness is 3-5 mm.
Preferably, the overall surface flatness of the hammered wall 10 is between 3 and 5mm with respect to the upper, middle and lower surface flatness.
In the step (3), the batten 6 is aligned with the expansion bolt hole 8 of the hammering wall surface 10, and the batten 6 is anchored on the hammering wall surface 10 by inserting the expansion bolt 7 into the expansion bolt hole 8.
In the step (5), the force directly above and directly below the hammering block 6 is the same.
The seismic wave tester 1 and the detector 4 form an acquisition system.
In the step (6), the data is recorded in an RSW format, and each channel of seismic record is balanced.
The shearing mat 9 is a high-strength shearing fiber or steel wire mat, and the thickness is 1.5-2 mm.
The transverse wave first arrival time T i Equal to the forward first arrival time T pi First arrival time in opposite directionT Ri Is a mean arithmetic value of (c).
Specifically, the transverse wave first arrival time T at the ith point of the detector 4 i Equal to the forward first arrival time T pi And the first arrival time T in the opposite direction Ri Is a mean arithmetic value of (c).
Specifically, the transverse wave velocity V of 4 points of two detectors i-i+1 The calculation formula is as follows:
V i-i+1 ＝L/T i+1 +1-T i ；
wherein: v (V) i-i+1 The transverse wave speed from the point of the detector i+1 to the point of the detector i; l is the distance from the point i+1 of the detector to the point i of the detector; t (T) i +1 is the transverse wave first arrival time at point i+1 of the detector; t (T) i Is the transverse wave first arrival time of the point i of the detector.
Claims (10)
1. A large-scale chamber side wall earthquake transverse wave testing method is characterized in that: the method comprises the following steps:
(1) processing a cuboid hard wood block (6), transversely arranging a plurality of rows of grooves on a wood block wall surface (11) of the wood block (6), and arranging a group of expansion bolt holes (8) on the other side;
(2) selecting a hammering wall surface (10) at the position of the transverse wave test area which is not smaller than 1.5m, and drilling a group of expansion bolt holes (8) corresponding to the battens (6) on the hammering wall surface (10);
(3) a shearing resistant cushion (9) is arranged on the hammering wall surface (10), the batten (6) is arranged on the shearing resistant cushion (9), and the batten surface (11) of the batten (6) is contacted with the shearing resistant cushion (9);
(4) a group of detectors (4) with the interval of 1-2 m are arranged on the central line of a square (6), the detectors (4) are connected with a seismic wave tester (1) through a lead (2), and a synchronous switch line (3) is used for connecting a sledge (5) and the seismic wave tester (1);
(5) hammering is carried out on the right upper part and the right lower part of the square timber (6) by a large hammer (5), and the right-direction earthquake transverse wave generated on the right upper part and the right lower part are collected by a earthquake wave tester (1) and a wave detector (4);
(6) recording the data of the channel earthquake of each detector (4) from near to far, and recording the sameThe seismic transverse wave in the forward direction and the reverse direction of the wave detector (4) is compared, and the first arrival time T of the transverse wave is picked up i Then the transverse wave first arrival time T of each picked-up detector (4) i Recording is performed in the order from near to far.
2. The method for testing earthquake transverse waves of a side wall of a large-scale cavern as set forth in claim 1, wherein: the grooves are uniformly formed in the wood wall surface (11), the grooves are elliptical, the depth of each groove is 3-5 mm, the ratio of the depth of each groove to the width of each groove is 0.7-1.0, and the width of each groove is 3mm.
3. The method for testing earthquake transverse waves of a side wall of a large-scale cavern as set forth in claim 1, wherein: in the step (2), the hammering wall surface (10) is positioned at the left side or the right side of the transverse wave test area.
4. The method for testing earthquake transverse waves of a side wall of a large-scale cavern as set forth in claim 1, wherein: in the step (2), the surface of the hammering wall surface (10) needs to be transversely roughened, and the flatness of the hammering wall surface is 3-5 mm.
5. The method for testing earthquake transverse waves of a side wall of a large-scale cavern as set forth in claim 1, wherein: in the step (3), the batten (6) is aligned with an expansion bolt hole (8) of the hammering wall surface (10), the expansion bolt (7) is inserted into the expansion bolt hole (8), and the batten (6) is anchored on the hammering wall surface (10).
6. The method for testing earthquake transverse waves of a side wall of a large-scale cavern as set forth in claim 1, wherein: in the step (5), the force right above and below the hammering block (6) is the same.
7. The method for testing earthquake transverse waves of a side wall of a large-scale cavern as set forth in claim 1, wherein: the seismic wave tester (1) and the detector (4) form an acquisition system.
8. The method for testing earthquake transverse waves of a side wall of a large-scale cavern as set forth in claim 1, wherein: in the step (6), the data is recorded in an RSW format, and each channel of seismic record is balanced.
9. The method for testing earthquake transverse waves of a side wall of a large-scale cavern as set forth in claim 1, wherein: the shearing-resistant cushion (9) is a shearing-resistant fiber or steel wire cushion, and the thickness is 1.5-2 mm.
10. The method for testing earthquake transverse waves of a side wall of a large-scale cavern as set forth in claim 1, wherein: the transverse wave first arrival time T i Equal to the forward first arrival time T pi And the first arrival time T in the opposite direction Ri Is a mean arithmetic value of (c).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011246962.7A CN112285766B (en) | 2020-11-10 | 2020-11-10 | Large-scale chamber side wall earthquake transverse wave testing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011246962.7A CN112285766B (en) | 2020-11-10 | 2020-11-10 | Large-scale chamber side wall earthquake transverse wave testing method |
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| Publication Number | Publication Date |
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| CN112285766A CN112285766A (en) | 2021-01-29 |
| CN112285766B true CN112285766B (en) | 2024-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011246962.7A Active CN112285766B (en) | 2020-11-10 | 2020-11-10 | Large-scale chamber side wall earthquake transverse wave testing method |
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| CN112987093A (en) * | 2021-02-07 | 2021-06-18 | 陕西省水利电力勘测设计研究院勘察分院 | Single-hole shear wave testing method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0043669A1 (en) * | 1980-06-26 | 1982-01-13 | Standard Oil Company | Method and apparatus for seismic surveying utilising enhanced friction technique |
| CN202057803U (en) * | 2011-05-18 | 2011-11-30 | 中水北方勘测设计研究有限责任公司 | Shear plate for testing secondary waves of rock mass |
| CN102608211A (en) * | 2012-03-21 | 2012-07-25 | 重庆交通大学 | Method for testing transverse wave velocity of indoor compaction test piece |
| CN203149130U (en) * | 2013-03-22 | 2013-08-21 | 中国水电顾问集团贵阳勘测设计研究院 | Seismic transverse wave excitation apparatus |
| CN103487826A (en) * | 2013-10-11 | 2014-01-01 | 钟世航 | Wavelet analysis device for elastic wave exploration and shocking method of wavelet analysis device |
-
2020
- 2020-11-10 CN CN202011246962.7A patent/CN112285766B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0043669A1 (en) * | 1980-06-26 | 1982-01-13 | Standard Oil Company | Method and apparatus for seismic surveying utilising enhanced friction technique |
| CN202057803U (en) * | 2011-05-18 | 2011-11-30 | 中水北方勘测设计研究有限责任公司 | Shear plate for testing secondary waves of rock mass |
| CN102608211A (en) * | 2012-03-21 | 2012-07-25 | 重庆交通大学 | Method for testing transverse wave velocity of indoor compaction test piece |
| CN203149130U (en) * | 2013-03-22 | 2013-08-21 | 中国水电顾问集团贵阳勘测设计研究院 | Seismic transverse wave excitation apparatus |
| CN103487826A (en) * | 2013-10-11 | 2014-01-01 | 钟世航 | Wavelet analysis device for elastic wave exploration and shocking method of wavelet analysis device |
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| CN112285766A (en) | 2021-01-29 |
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