CN105676274A - Ground anchor seismic focus device for exciting shear wave of loose ground layer through stratum detection method - Google Patents
Ground anchor seismic focus device for exciting shear wave of loose ground layer through stratum detection method Download PDFInfo
- Publication number
- CN105676274A CN105676274A CN201610079228.3A CN201610079228A CN105676274A CN 105676274 A CN105676274 A CN 105676274A CN 201610079228 A CN201610079228 A CN 201610079228A CN 105676274 A CN105676274 A CN 105676274A
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- China
- Prior art keywords
- plank
- ground
- earth anchor
- ground anchor
- wood plate
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- 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
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- Engineering & Computer Science (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Acoustics & Sound (AREA)
- Environmental & Geological Engineering (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Geophysics (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a ground anchor seismic focus device for exciting a shear wave of a loose ground layer through a stratum detection method, and belongs to the technical field of geotechnical engineering. The device consists of a wood plate (2) with a bottom shaped like a triangular sawtooth (1), a left steel sleeve (4) and a right steel sleeve (10) which are disposed at left and right ends of the wood plate (2) and used for protecting the wood plate (2), a left rubber gasket (3) and a right rubber gasket (11) which are respectively disposed outside the left steel sleeve (4) and the right steel sleeve (10), and a ground anchor system (12) which is used for the connection of the wood plate (2) with a ground layer. The ground anchor system (12) consists of five small ground anchors which are the same, and each small ground anchor comprises a plate hole protection steel piece (6) inset in the wood plate (2), a ground anchor shaft (5), a screw cap (8), a screw cap gasket (7), and a ground anchor clamping button (9). The device is advantageous in that the device is light and convenient, is large in application range, and can make the most of the counter force of the ground anchors. Moreover, the wood plate (2) is good in stability, and is long in service life. The device reduces the excitation frequency of a big hammer, and enables the excitation depth of an excitation source to be large.
Description
Technical field:
The present invention relates to a kind of inspection layer method for broken ground and excite the earth anchor seismic source apparatus of shearing wave, belong to Geotechnical Engineering technical field of measurement and test.
Background technology:
In current engineering investigation project, more needs to test in the borehole the shear wave velocity of each soil layer, it is used for evaluating type and the Architectural site partition etc. of Site Soil, the method measuring shearing wave at the scene mainly has two kinds: single hole inspection layer method and diplopore cross hole method, though cross hole method is direct, but need more than diplopore, and need rig cooperation etc., relatively complicated. So with more be single hole inspection layer method, divides by the exciting mode of focus, current single hole examines layer method mainly three kinds of exciting modes:
1, ballast hammering method; 2, spring excitation method; 3, directional blasting method;
Shortcoming: ballast hammering method needs to use at the scene the weight of more than 500kg, and dress hangs trouble; The carrying of spring excitation method and installation are all pretty troublesome, generally have during particular/special requirement and just adopt; Directional blasting method needs explosive, there is certain safety, and this focus uses also cumbersome.
Summary of the invention:
It is an object of the invention to overcome the deficiency of prior art, and provide that a kind of work efficiency is high in broken ground, experimental data is reliable, and a kind of inspection layer method for broken ground of light transport can excite the earth anchor seismic source apparatus of shearing wave.
The inspection layer method for broken ground of the present invention excites the earth anchor seismic source apparatus of shearing wave, plank (2) by bottom sawtooth triangular in shape (1) that can produce shearing friction power effect with ground, it is placed in left steel bushing (4) and the right steel bushing (10) for protecting plank at plank (2) two ends, left and right, it is separately mounted to left steel bushing (4) and right steel bushing (10) outside and for lowering left glue gasket (3) and the right glue gasket (11) of excited frequency, for earth anchor system (12) composition that plank (2) is connected with stratum;Wherein, earth anchor system (12) is made up of 5 identical little earth anchors, and each little earth anchor includes: the orderliness being mounted in plank (2) protects steel disc (6), the earth anchor axle (5) that makes plank (2) be connected with stratum, make plank (2) and the nut (8) of stratum close contact, nut pad (7) and for laying ground anchor clamp knob (9) of earth anchor rotating push rod.
The present invention adopts the product of market sale and material to prepare according to a conventional method.
The beneficial effects of the present invention is:
1, owing to have employed the counterforce device of ground anchor type, it is to avoid transport or find the trouble of weight, equipment is light, and a very important person pushes away the stratum that earth anchor can dig into and can both use.
2, adopt 5 identical earth anchors to be evenly distributed in the plank for shearing, and each earth anchor is fitted with king bolt, tightened the screw by manpower wrench, the counter-force of earth anchor can not only be made full use of, additionally it is possible to play the effect of stable plank.
3, the steel bushing on plank and orderliness protect steel disc, can extend the use time of plank.
4, the glue gasket at plank two ends, can lower the stimulating frequency of sledgehammer, makes the exciting depth down of stimulus.
5, work efficiency is high, experimental data is reliable, convenient transportation.
Accompanying drawing illustrates:
Structural representation for the present invention.
Detailed description of the invention:
Below in conjunction with accompanying drawing, the invention will be further described.
The inspection layer method for broken ground of the present invention excites the earth anchor seismic source apparatus of shearing wave, the inspection layer method for broken ground of the present invention excites the earth anchor seismic source apparatus of shearing wave, plank 2 by the bottom sawtooth 1 triangular in shape that can produce shearing friction power effect with ground, it is placed in left steel bushing 4 and the right steel bushing 10 for protecting plank at plank about 2 two ends, being separately mounted to outside left steel bushing 4 and right steel bushing 10 and for lowering left glue gasket 3 and the right glue gasket 11 of excited frequency, the earth anchor system 12 being connected with stratum for plank 2 forms; Wherein, earth anchor system 12 is made up of 5 identical little earth anchors, and each little earth anchor includes: the orderliness being mounted in plank 2 protects steel disc 6, the earth anchor axle 5 that makes plank 2 be connected with stratum, make plank 2 and the nut 8 of stratum close contact, nut pad 7 and for laying the ground anchor clamp knob 9 of earth anchor rotating push rod.
Before test, first on one piece of plank bottom surface chosen by design size, triangular sawtooth 1 is made, and on plate 2, get out five eyelets, each eyelet tumbles in five block protection steel discs 6, the steel bushing 4 and the steel bushing 10 that are embedded with glue gasket 3 and glue gasket 11 are installed at two ends again, then confirm that boring superficial part is the broken ground that can be used for artificial earth anchor, a long block terrace is sorted out by the shape of plank 2 again on boring side, make the midpoint distance being bored into plank 2 vertical with the axis of plank 2, make the position on the ground of five eyelets on plank 2, card rod is stuck in ground anchor clamp and turns round rotation on 9, five earth anchors 5 are all twisted in soil, it is enclosed within five earth anchors and make its bottom surface to be in close contact with ground by shearing plank 2, five earth anchors 5 are all set up nut pad 7 and nut 8, tightened with big wrench, form earth anchor system 12.
During test, the three-component probe that shearing wave is first tested system is put at the bottom of hole, makes probe and hole wall be adjacent to, opening test instrunment, with sledgehammer flat plank 2 left end, record left end knocks shear-wave data, flat plank 2 right-hand member again, record right-hand member knocks shear-wave data. Then by three-component probe toward lifting up 1 meter, repeat top-operation, until ground, complete the shear wave velocity measurement work of whole boring.
The operation principle of the present invention is:
Plank 2 by five earth anchors 5 and bottom surface sawtooth 1 triangular in shape, make to shear plank 2 and produce bigger shearing force with stratum, the rubber cushion 3 and 11 at plank 2 two ends can make sledgehammer exciting produce relatively low frequency, nut 8 on earth anchor and pad 3 and 11 make the counter-force of shearing plank 2 earth anchor 5, shear plate plank 2 is made to contact more closely with ground, these measures can make shearing wave energy bigger and propagate deeper, when three-component probe is observed from foot of hole from the bottom up by every meter of point (or by selected distance), can guarantee that the shearing wave receiving enough energy, and along with the rising of measuring point, the energy of shearing wave stimulus is increasing, at this moment need to reduce the energy that impulses of sledgehammer, until well head, record the waveform time information of each measuring point, test terminates.
Showing through actually used, the present invention is fully achieved designing requirement. Not only work efficiency is high, experimental data is reliable, moreover it is possible to light transport.
Claims (1)
1. one kind excites the earth anchor seismic source apparatus of shearing wave for the layer method of examining of broken ground, it is characterized in that this device plank (2) by bottom sawtooth triangular in shape (1) that can produce shearing friction power effect with ground, it is placed in left steel bushing (4) and the right steel bushing (10) for protecting plank at plank (2) two ends, left and right, it is separately mounted to left steel bushing (4) and right steel bushing (10) outside, and for lowering left glue gasket (3) and the right glue gasket (11) of excited frequency, for earth anchor system (12) composition that plank (2) is connected with stratum, wherein, earth anchor system (12) is made up of 5 identical little earth anchors, and each little earth anchor includes: the orderliness being mounted in plank (2) protects steel disc (6), the earth anchor axle (5) that makes plank (2) be connected with stratum, make plank (2) constitute with the nut (8) of stratum close contact, nut pad (7) and ground anchor clamp knob (9) for laying earth anchor rotating push rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610079228.3A CN105676274A (en) | 2016-02-04 | 2016-02-04 | Ground anchor seismic focus device for exciting shear wave of loose ground layer through stratum detection method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610079228.3A CN105676274A (en) | 2016-02-04 | 2016-02-04 | Ground anchor seismic focus device for exciting shear wave of loose ground layer through stratum detection method |
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| CN105676274A true CN105676274A (en) | 2016-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610079228.3A Pending CN105676274A (en) | 2016-02-04 | 2016-02-04 | Ground anchor seismic focus device for exciting shear wave of loose ground layer through stratum detection method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| RU2171479C1 (en) * | 2000-02-03 | 2001-07-27 | Томский политехнический университет | Vibration pulse source of seismic signals |
| JP2001356176A (en) * | 2000-06-14 | 2001-12-26 | Nippon Nessui Kaihatsu Kk | Active indirect prospecting method and device for executing the method |
| 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 |
| CN202794549U (en) * | 2012-07-23 | 2013-03-13 | 中国神华能源股份有限公司 | Shear wave seismic focus base used for geological exploration system |
| 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 |
| CN104406755A (en) * | 2014-12-11 | 2015-03-11 | 河南工业大学 | Laminar vibrating shear soil box testing apparatus |
| CN204676517U (en) * | 2015-03-18 | 2015-09-30 | 中国电建集团华东勘测设计研究院有限公司 | The in situ shear wave testing arrangement of ocean formation |
| CN205404826U (en) * | 2016-02-04 | 2016-07-27 | 中国有色金属工业昆明勘察设计研究院 | A earth anchor seismic source device that is used for layer method of examining of broken ground to arouse shear wave |
-
2016
- 2016-02-04 CN CN201610079228.3A patent/CN105676274A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2171479C1 (en) * | 2000-02-03 | 2001-07-27 | Томский политехнический университет | Vibration pulse source of seismic signals |
| JP2001356176A (en) * | 2000-06-14 | 2001-12-26 | Nippon Nessui Kaihatsu Kk | Active indirect prospecting method and device for executing the method |
| 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 |
| CN202794549U (en) * | 2012-07-23 | 2013-03-13 | 中国神华能源股份有限公司 | Shear wave seismic focus base used for geological exploration system |
| 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 |
| CN104406755A (en) * | 2014-12-11 | 2015-03-11 | 河南工业大学 | Laminar vibrating shear soil box testing apparatus |
| CN204676517U (en) * | 2015-03-18 | 2015-09-30 | 中国电建集团华东勘测设计研究院有限公司 | The in situ shear wave testing arrangement of ocean formation |
| CN205404826U (en) * | 2016-02-04 | 2016-07-27 | 中国有色金属工业昆明勘察设计研究院 | A earth anchor seismic source device that is used for layer method of examining of broken ground to arouse shear wave |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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