CN102087367A - Method for dividing bed rock weathering zones by using longitudinal wave-surface wave speed ratio method - Google Patents
Method for dividing bed rock weathering zones by using longitudinal wave-surface wave speed ratio method Download PDFInfo
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- CN102087367A CN102087367A CN2010105498320A CN201010549832A CN102087367A CN 102087367 A CN102087367 A CN 102087367A CN 2010105498320 A CN2010105498320 A CN 2010105498320A CN 201010549832 A CN201010549832 A CN 201010549832A CN 102087367 A CN102087367 A CN 102087367A
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Abstract
The invention relates to a method for dividing bed rock weathering zones by using a longitudinal wave-surface wave speed ratio method. The method comprises the following steps of: (1) arranging an earthquake arrangement graph on the ground surface; (2) carrying out refracted wave inversion on the earthquake arrangement to primarily divide stratums and determine the longitudinal wave speed VP of the stratums; (3) carrying out Rayleigh wave inversion on the earthquake arrangement to primarily divide stratums and determine the Rayleigh wave speed of the stratums to be VR; and (4) dividing weathering zones of rocks according to the formula of VP/VR=K. The method has the advantages that excitation is carried out once, longitudinal waves and surface waves are simultaneously received to achieve the purpose of complex geophysical prospecting, and the cost of seismic exploration can be reduced by more than 60 percent; earthquake arrangement can be flexibly arranged in places which are difficult to carry out geotechnical engineering investigation and drilling, which solves the problem of stratigraphic division; and the K value can be accurately determined through counting a large quantity of pore wave speed testing data and is used as a division standard of rock weathering degrees. The method is an area type prospection method, has the advantage of abundant information by viewing in the grander scheme and has more comprehensiveness compared with drilling.
Description
Technical field
The present invention relates to the geotechnical engineering investigation technical field, specifically a kind of compressional wave-surface wave speed ratioing technigue is divided the method for bedrock weathering zone.
Background technology
Division to the rock decay band both at home and abroad mainly contains RQD classification, the classification of rock-mass quality Q system, jointed rock mass RMR classification and rock-mass quality index RMQ classification, these division methods mainly are based upon probing, eye-observation, knock on the bases such as sound, lack a kind of relatively-stationary standard, cause a deviation easily.And in the hole, implement in-situ test, and then need probing to cooperate, be difficult to satisfy the requirement of area prospecting.
Summary of the invention
The objective of the invention is to develop the method that a kind of compressional wave-surface wave speed ratioing technigue is divided bedrock weathering zone.
Compressional wave of the present invention-surface wave speed ratioing technigue is divided the method for bedrock weathering zone, and its step is as follows:
(1) arrange seismic arrangement figure on the face of land:
1. O
1～O
18: for exciting shot point, O
4～O
15Equidistantly arrange spacing size and R
1～R
12The spacing unanimity, O
1～O
3, O
15～O
18The spacing size is determined according to strata condition;
2. R
1～R
12: for 4Hz receives wave detector, arranges that equidistantly spacing is generally 1 meter;
3. R
1～R
12With O
4～O
15Reception, shot point overlap;
4. R
1～R
12Be connected with seismograph by cable;
5. excite O successively
1～O
18Seismograph receives 18 big gun earthquake informations altogether;
(2) seismic arrangement is carried out the refraction wave inverting, the velocity of longitudinal wave V on stratum is determined on the Preliminary division stratum
P
(3) seismic arrangement is carried out the inverting of auspicious Leibo, the Preliminary division stratum determines that the auspicious Leibo speed on stratum is V
R
(4) according to V
P/ V
R=K value is divided the atmospheric disintegration of rocks band and is severely-weathered, middle weathering, or gentle breezeization.
O in the described step (1)-1.
1～O
3, O
15～O
18The spacing size determines that method is as follows:
A. employing launches ranking method and distinguishes significant wave and interference wave, and the length of launching to arrange is 4-6 times of physical record length;
B. by launching arrangement analysis direct wave, reflection wave, refraction wave, determine O
1～R
1, R
12～O
18Distance, this distance is maximum offset, O
2To R
1Distance, O
17To R
12Distance get half at offset distance.
According to boring velocity of wave statistics, K value value according to the form below carries out:
| Degree of rock weathering | Severely-weathered | Middle weathering | Gentle breezeization |
| The K value | 1.45～1.58 | 1.58～1.65 | 1.65～1.74 |
The advantage that compressional wave-surface wave speed ratioing technigue is divided the method for bedrock weathering zone is:
1. excite once, compressional wave, ground roll receive simultaneously, and the purpose that reaches the physical prospecting integrated survey can reduce the cost of seismic exploration more than 60%;
2. geotechnical engineering investigation is executed the place of boring difficulty, can arrange seismic arrangement neatly, solve the problem of stratigraphic division;
3. pass through statistics, can accurately determine the K value velocity of wave test data in a large amount of holes, and as the criteria for classifying of degree of rock weathering;
4. this method is a kind of area-type surveying method, from the macroscopic view abundant information, has more comprehensive than probing.
Description of drawings
Fig. 1 is seismic arrangement figure.
Embodiment
Embodiment one
According to shown in Figure 1, a kind of compressional wave-surface wave speed ratioing technigue is divided the method for bedrock weathering zone, and its step is as follows:
(1) a large amount of known boring wave velocity testing data of statistics, compressional wave, shear wave velocity ratio in the statistical computation hole utilize the approaching substantially relation of speed of shear wave and ground roll to carry out Inversion Calculation with the alternative shear wave of ground roll;
(2) arrange seismic arrangement on the face of land;
(3) excite (O successively on the face of land
1～O
18Show as Fig. 1 that shot point) seismograph receives successively and excites the refracted longitudinal wave V that is produced
PWith ground roll V
R
(4) utilize refraction, ground roll inversion program, respectively Preliminary division stratum and calculate its speed V
P, V
R
(5) calculating K=V
P/ V
RValue is divided the rock decay band according to the K value; When the K value in 1.45～1.58 intervals, can be divided into severely-weathered band.
Embodiment two
According to shown in Figure 1, a kind of compressional wave-surface wave speed ratioing technigue is divided the method for bedrock weathering zone, and its step is as follows:
(1) a large amount of known boring wave velocity testing data of statistics, compressional wave, shear wave velocity ratio in the statistical computation hole utilize the approaching substantially relation of speed of shear wave and ground roll to carry out Inversion Calculation with the alternative shear wave of ground roll;
(2) arrange seismic arrangement on the face of land;
(3) excite (O successively on the face of land
1～O
18Show as Fig. 1 that shot point) seismograph receives successively and excites the refracted longitudinal wave V that is produced
PWith ground roll V
R
(4) utilize refraction, ground roll inversion program, respectively Preliminary division stratum and calculate its speed V
P, V
R
(5) calculating K=V
P/ V
RValue is divided the rock decay band according to the K value; When the K value in 1.58～1.65 intervals, can be divided into middle zone of weathering.
Embodiment three
According to shown in Figure 1, a kind of compressional wave-surface wave speed ratioing technigue is divided the method for bedrock weathering zone, and its step is as follows:
(1) a large amount of known boring wave velocity testing data of statistics, compressional wave, shear wave velocity ratio in the statistical computation hole utilize the approaching substantially relation of speed of shear wave and ground roll to carry out Inversion Calculation with the alternative shear wave of ground roll;
(2) arrange seismic arrangement on the face of land;
(3) excite (O successively on the face of land
1～O
18Show as Fig. 1 that shot point) seismograph receives successively and excites the refracted longitudinal wave V that is produced
PWith ground roll V
R
(4) utilize refraction, ground roll inversion program, respectively Preliminary division stratum and calculate its speed V
P, V
R
(5) calculating K=V
P/ V
RValue is divided the rock decay band according to the K value; When the K value in 1.65～1.74 intervals, can be divided into little zone of weathering.
Actual engineering is carried out the ground roll test earlier, divides the stratum by last table, adopts the boring checking then, stratigraphic division rate of accuracy reached to 95%.
Claims (3)
1. a compressional wave-surface wave speed ratioing technigue is divided the method for bedrock weathering zone, and it is characterized in that: its step is as follows:
(1) arrange seismic arrangement figure on the face of land:
1. O
1～O
18: for exciting shot point, O
4～O
15Equidistantly arrange spacing size and R
1～R
12The spacing unanimity, O
1～O
3, O
15～O
18The spacing size is determined according to strata condition;
2. R
1～R
12: for 4Hz receives wave detector, arranges that equidistantly spacing is generally 1 meter;
3. R
1～R
12With O
4～O
15Reception, shot point overlap;
4. R
1～R
12Be connected with seismograph by cable;
5. excite O successively
1～O
18Seismograph receives 18 big gun earthquake informations altogether;
(2) seismic arrangement is carried out the refraction wave inverting, the velocity of longitudinal wave V on stratum is determined on the Preliminary division stratum
P
(3) seismic arrangement is carried out the inverting of auspicious Leibo, the Preliminary division stratum determines that the auspicious Leibo speed on stratum is V
R
(4) according to V
P/ V
R=K value is divided the atmospheric disintegration of rocks band and is severely-weathered, middle weathering, or gentle breezeization.
2. compressional wave according to claim 1-surface wave speed ratioing technigue is divided the method for bedrock weathering zone, it is characterized in that: O in the described step (1)-1.
1～O
3, O
15～O
18The spacing size determines that method is as follows:
A. employing launches ranking method and distinguishes significant wave and interference wave, and the length of launching to arrange is 4-6 times of physical record length;
B. by launching arrangement analysis direct wave, reflection wave, refraction wave, determine O
1～R
1, R
12～O
18Distance, this distance is maximum offset, O
2To R
1Distance, O
17To R
12Distance get half at offset distance.
3. compressional wave according to claim 1-surface wave speed ratioing technigue is divided the method for bedrock weathering zone, it is characterized in that: when the K value in 1.45～1.58 intervals, can be divided into severely-weathered band; When the K value in 1.58～1.65 intervals, can be divided into middle zone of weathering; When the K value in 1.65～1.74 intervals, can be divided into little zone of weathering.
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|---|---|---|---|
| CN201010549832A CN102087367B (en) | 2010-11-19 | 2010-11-19 | Method for dividing bed rock weathering zones by using longitudinal wave-surface wave speed ratio method |
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|---|---|---|---|
| CN201010549832A CN102087367B (en) | 2010-11-19 | 2010-11-19 | Method for dividing bed rock weathering zones by using longitudinal wave-surface wave speed ratio method |
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| CN102087367B CN102087367B (en) | 2012-10-03 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102749649A (en) * | 2012-04-10 | 2012-10-24 | 恒泰艾普石油天然气技术服务股份有限公司 | Determination method of optimal weathered layer speed |
| CN102866099A (en) * | 2012-08-14 | 2013-01-09 | 北京矿产地质研究院 | Method for measuring weathering depth of rock |
| CN107506556A (en) * | 2017-08-31 | 2017-12-22 | 中水北方勘测设计研究有限责任公司 | A kind of short-cut method for determining fresh intact rock sound wave velocity of longitudinal wave value |
| CN109471169A (en) * | 2018-11-07 | 2019-03-15 | 中国铁路设计集团有限公司 | A kind of Rock Mass Integrality evaluation method based on seismic refraction method |
| CN109541690A (en) * | 2018-11-30 | 2019-03-29 | 中铁第四勘察设计院集团有限公司 | A kind of shallow-layer dielectric structure face loosening degree evaluation method |
| CN110646864A (en) * | 2019-10-16 | 2020-01-03 | 中国电建集团成都勘测设计研究院有限公司 | Complex engineering geological rock group classification method for inserting irregular invaded rocks and veins |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2105999C1 (en) * | 1996-06-20 | 1998-02-27 | Институт геофизики СО РАН | Acoustic method of prediction of geological section |
| CN101644782A (en) * | 2009-08-25 | 2010-02-10 | 中国石化集团胜利石油管理局 | Denoising method of multiwave components seismic data based on polarization filtering |
-
2010
- 2010-11-19 CN CN201010549832A patent/CN102087367B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2105999C1 (en) * | 1996-06-20 | 1998-02-27 | Институт геофизики СО РАН | Acoustic method of prediction of geological section |
| CN101644782A (en) * | 2009-08-25 | 2010-02-10 | 中国石化集团胜利石油管理局 | Denoising method of multiwave components seismic data based on polarization filtering |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102749649A (en) * | 2012-04-10 | 2012-10-24 | 恒泰艾普石油天然气技术服务股份有限公司 | Determination method of optimal weathered layer speed |
| CN102749649B (en) * | 2012-04-10 | 2014-09-17 | 恒泰艾普石油天然气技术服务股份有限公司 | Determination method of optimal weathered layer speed |
| CN102866099A (en) * | 2012-08-14 | 2013-01-09 | 北京矿产地质研究院 | Method for measuring weathering depth of rock |
| CN102866099B (en) * | 2012-08-14 | 2015-04-08 | 北京矿产地质研究院 | Method for measuring weathering depth of rock |
| CN107506556A (en) * | 2017-08-31 | 2017-12-22 | 中水北方勘测设计研究有限责任公司 | A kind of short-cut method for determining fresh intact rock sound wave velocity of longitudinal wave value |
| CN107506556B (en) * | 2017-08-31 | 2020-11-24 | 中水北方勘测设计研究有限责任公司 | Method for determining sound wave longitudinal wave velocity value of fresh complete rock mass |
| CN109471169A (en) * | 2018-11-07 | 2019-03-15 | 中国铁路设计集团有限公司 | A kind of Rock Mass Integrality evaluation method based on seismic refraction method |
| CN109541690A (en) * | 2018-11-30 | 2019-03-29 | 中铁第四勘察设计院集团有限公司 | A kind of shallow-layer dielectric structure face loosening degree evaluation method |
| CN110646864A (en) * | 2019-10-16 | 2020-01-03 | 中国电建集团成都勘测设计研究院有限公司 | Complex engineering geological rock group classification method for inserting irregular invaded rocks and veins |
| CN110646864B (en) * | 2019-10-16 | 2021-06-25 | 中国电建集团成都勘测设计研究院有限公司 | Complex engineering geological rock group classification method for inserting irregular invaded rocks and veins |
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|---|---|
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