CN203475404U - Standard penetration test device for dividing rock weathering degree - Google Patents
Standard penetration test device for dividing rock weathering degree Download PDFInfo
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- CN203475404U CN203475404U CN201320592765.XU CN201320592765U CN203475404U CN 203475404 U CN203475404 U CN 203475404U CN 201320592765 U CN201320592765 U CN 201320592765U CN 203475404 U CN203475404 U CN 203475404U
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- hammer
- penetrator
- sounding rod
- rock
- punching
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- 239000011435 rock Substances 0.000 title claims abstract description 40
- 238000012360 testing method Methods 0.000 title claims abstract description 33
- 230000035515 penetration Effects 0.000 title claims abstract description 25
- 238000004080 punching Methods 0.000 claims abstract description 26
- 239000002184 metal Substances 0.000 claims abstract description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 238000005259 measurement Methods 0.000 abstract description 3
- 238000011065 in-situ storage Methods 0.000 abstract description 2
- 238000009434 installation Methods 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
- 230000015572 biosynthetic process Effects 0.000 description 12
- 239000007924 injection Substances 0.000 description 9
- 238000002347 injection Methods 0.000 description 9
- 239000002689 soil Substances 0.000 description 5
- 238000005553 drilling Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 239000012899 standard injection Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The utility model belongs to the technical field of in-situ test equipment, and relates to a standard penetration test device for dividing rock weathering degree, wherein a guide rod is embedded in the middle of a piercing hammer; the bottom of the punching hammer with the automatic unhooking device is provided with a hammer pad; the bottom of the hammer pad is fixedly connected with a feeler lever by screw threads; the feeler lever is provided with scale marks; the penetration device with the cutting edge and the hollow metal pipe structure is connected and fastened with the feeler lever through a screw thread; the top end of the penetration device is provided with a water outlet hole; the device has the advantages of simple structure, convenient operation, convenient installation and measurement and reading, and can directly divide the weathering degree of the weathered rock, and subdivide the boundary of the strongly weathered rock and the upper, middle and lower three sub-bands of the strongly weathered rock.
Description
Technical field:
The utility model belongs in situ test equipment technical field, relate to a kind of standard penetration test device of dividing degree of rock weathering, be used for judging decomposed rock area atmospheric disintegration of rocks degree classified types, make up the deficiency that existing equipment can only be applicable to sandy soil, cohesive soil and decomposed rock residual soil, can directly divide the rate of decay of decayed rock, to segmenting out three of the upper, middle and lower subzone of highly weathered rock in severely-weathered～middle weathering compared with hard rock.
Background technology:
At present, degree of rock weathering is divided and is mostly adopted engineering geology qualitative evaluating method, from rock texture, color, mineralogical composition, the comprehensive Analysis deterrminations in aspect such as joints development degree and driving complexity, rely on these divisions that uncertain judgment foundation is carried out rate of decay qualitatively with very large randomness, while especially existing gradual change to be related between two dimming class, carry out very large difficulty to intermediate zone demarcation of boundaries tape, and, national standard < < Code for investigation of geotechnical engineering > > (GB50021 – 2001) regulation, for granitoid, can adopt standard penetration test to divide its rate of decay, N >=50 are severely-weathered, 50>N >=30 are completely decomposed, N<30 is residual soil, and wherein, N is standard penetration test blowcount, but, for the division of severely-weathered～middle decayed rock, not providing the criteria for classifying that adopts standard penetration test, existing standard injection equipment (standard penetration device) can not adapt to such harder decomposed rock.Therefore, design a kind of improved standard penetration test device scene and differentiate degree of rock weathering by test index, severely-weathered～middle decayed rock (severely-weathered three of the upper, middle and lower subzone that is divided into) particularly, accurately divide weathered layer, for excavating, bearing capacity, selecting properly type of foundation, minimizing investment and reduction of erection time are significant.
Summary of the invention:
Goal of the invention of the present utility model is to overcome the shortcoming that prior art exists, seek design a kind of standard penetration test device of dividing degree of rock weathering is provided, utilization is dropped hammer energy by penetrator injection soil, according to the hammering number (N) of squeezing in decomposed rock, intuitively differentiates degree of rock weathering.
To achieve these goals, agent structure of the present utility model comprises guide peg, punching hammer, pallet, sounding rod, weep hole and penetrator; Guide peg is embedded to be arranged in the middle of punching hammer, for controlling the free-falling direction of punching hammer; The bottom of hammering into shape with the punching of automatic decoupling device is provided with pallet, and punching hammer energy freely falling body is to pallet, and the heavy 63.5kg of the hammer of punching hammer, falls apart from 76cm; The bottom of pallet adopts screw thread to be fastenedly connected and is shaped with sounding rod; On sounding rod, be provided with graduation mark, for observation depth of penetration directly perceived, the diameter of sounding rod is 42mm; Penetrator and sounding rod with the hollow metal tubular structure of cutting edge are fastening by screwed connection, and penetrator adopts ultra high strength alloy steel to make, and the length of penetrator is 300mm, and internal diameter is 35mm, and external diameter is 55mm, and blade angle is 22 °; The top of penetrator is provided with the weep hole that diameter is 15mm.
The concrete steps that the utility model completes standard penetration test are:
(1), adopting conventional drilling tool will test weathered rock formation holes to testing the above 5cm of weathered rock formation absolute altitude, removes surflaes, and carry out as required retaining wall;
(2), before injection, connect standard penetration test device, check that the joint of sounding rod guarantees that the joint of sounding rod does not get loose, then penetrator is put into boring at the bottom of hole, measure drilling depth, keep sounding rod vertical;
(3), during injection, employing is carried out hammering with the punching hammer of automatic decoupling device, guarantee apart from being 76cm, during the free-falling of punching hammer, reduce the frictional resistance between guide peg and punching hammer, while avoiding the hammering of punching hammer, bias and side direction are rocked, and vertical after keeping guide peg, sounding rod and penetrator to be connected;
(4), with per minute 15～30 penetrating speed that hit, penetrator is squeezed in test weathered rock formation, first according to the graduation mark on sounding rod, squeeze into 5cm in test weathered rock formation, the 5cm squeezing into disregards and hits number, and the hammering number of squeezing into afterwards 10cm in test weathered rock formation is counted N for actual measurement hammering; When depth of penetration is less than 10cm, according to formula N=30n/ Δ S, being converted into depth of penetration is that N is counted in the hammering of 10cm, and wherein n is that the hammering Shuo， unit of selected any injection amount is for hitting; Δ S is that to count the injection Liang， unit that n hits be cm in corresponding hammering;
(5), penetrator is proposed, obtain testing the rate of decay criteria for classifying of weathered rock formation: when N<18 is completely decomposed; 30>N >=18 are severely-weathered upper subzone; 45>N >=30 are severely-weathered middle subzone; 70>N >=45 are severely-weathered lower subzone; N >=70 are middle decomposed rock;
(6), if in the time of need proceeding the penetration test of next degree of depth, repeat aforesaid operations step and test.
Compared with prior art, it is simple in structure for the utility model, easy to operate, is convenient to installation and survey and reads, and can directly divide the rate of decay of decayed rock, by the segmentation of severely-weathered and middle decayed rock boundary and three subzones in strong-weathered rock upper, middle and lower.
Accompanying drawing explanation:
Fig. 1 is agent structure principle schematic of the present utility model.
Fig. 2 is the penetrator structural principle schematic diagram that the utility model relates to.
Fig. 3 is the cross section structure principle schematic of the penetrator that relates to of the utility model.
The specific embodiment:
Below in conjunction with accompanying drawing and by embodiment, the utility model is described in further detail.
Embodiment:
The agent structure of the present embodiment comprises guide peg 1, punching hammer 2, pallet 3, sounding rod 4, weep hole 5 and penetrator 6; Guide peg 1 is embedded to be arranged in the middle of punching hammer 2, for controlling the free-falling direction of punching hammer 2; Bottom with the punching hammer 2 of automatic decoupling device is provided with pallet 3, punching hammer 2 can freely falling bodies to pallet 3, the heavy 63.5kg of the hammer of punching hammer 2, falls apart from 76cm; The bottom of pallet 3 adopts screw thread to be fastenedly connected and is shaped with sounding rod 4; On sounding rod 4, be provided with graduation mark, for observation depth of penetration directly perceived, the diameter of sounding rod 4 is 42mm; Penetrator 6 with the hollow metal tubular structure of cutting edge is fastening by screwed connection with sounding rod 4, and penetrator 6 employing ultra high strength alloy steels are made, and the length of penetrator 6 is 300mm, and internal diameter is 35mm, and external diameter is 55mm, and blade angle is 22 °; The top of penetrator 6 is provided with the weep hole 5 that diameter is 15mm.
The concrete steps that the present embodiment completes standard penetration test are:
(1), adopting conventional drilling tool will test weathered rock formation holes to testing the above 5cm of weathered rock formation absolute altitude, removes surflaes, and carry out as required retaining wall;
(2), before injection, connect standard penetration test device, check that the joint of sounding rod 4 guarantees that the joint of sounding rod 4 does not get loose, then penetrator 6 is put into boring at the bottom of hole, measure drilling depth, keep sounding rod 4 vertical;
(3), during injection, employing is carried out hammering with the punching hammer 2 of automatic decoupling device, guarantee apart from being 76cm, when punching is hammered 2 free-falling into shape, reduce the frictional resistance between guide peg 1 and punching hammer 2, while avoiding punching to hammer 2 hammering into shape, bias and side direction are rocked, and vertical after keeping guide peg 1, sounding rod 4 and penetrator 6 to be connected;
(4), with per minute 15～30 penetrating speed that hit, penetrator 6 is squeezed in test weathered rock formation, first according to the graduation mark on sounding rod 4, squeeze into 5cm in test weathered rock formation, the 5cm squeezing into disregards and hits number, and the hammering number of squeezing into afterwards 10cm in test weathered rock formation is counted N for actual measurement hammering; When depth of penetration is less than 10cm, according to formula N=30n/ Δ S, being converted into depth of penetration is that N is counted in the hammering of 10cm, and wherein n is that the hammering Shuo， unit of selected any injection amount is for hitting; Δ S is that to count the injection Liang， unit that n hits be cm in corresponding hammering;
(5), penetrator 6 is proposed, obtain testing the rate of decay criteria for classifying of weathered rock formation: when N<18 is completely decomposed; 30>N >=18 are severely-weathered upper subzone; 45>N >=30 are severely-weathered middle subzone; 70>N >=45 are severely-weathered lower subzone; N >=70 are middle decomposed rock;
(6), if in the time of need proceeding the penetration test of next degree of depth, repeat aforesaid operations step and test.
Claims (1)
1. divide a standard penetration test device for degree of rock weathering, it is characterized in that agent structure comprises guide peg, punching hammer, pallet, sounding rod, weep hole and penetrator; Guide peg is embedded to be arranged in the middle of punching hammer; The bottom of hammering into shape with the punching of automatic decoupling device is provided with pallet, and punching hammer freely falling body is to pallet, and the heavy 63.5kg of the hammer of punching hammer, falls apart from 76cm; The bottom of pallet adopts screw thread to be fastenedly connected and is shaped with sounding rod; On sounding rod, be provided with graduation mark, the diameter of sounding rod is 42mm; Penetrator and sounding rod with the hollow metal tubular structure of cutting edge are fastening by screwed connection, and the length of penetrator is 300mm, and internal diameter is 35mm, and external diameter is 55mm, and blade angle is 22 °; The top of penetrator is provided with the weep hole that diameter is 15mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320592765.XU CN203475404U (en) | 2013-09-25 | 2013-09-25 | Standard penetration test device for dividing rock weathering degree |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320592765.XU CN203475404U (en) | 2013-09-25 | 2013-09-25 | Standard penetration test device for dividing rock weathering degree |
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| CN203475404U true CN203475404U (en) | 2014-03-12 |
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| CN201320592765.XU Expired - Fee Related CN203475404U (en) | 2013-09-25 | 2013-09-25 | Standard penetration test device for dividing rock weathering degree |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104060596A (en) * | 2014-06-07 | 2014-09-24 | 中铁上海设计院集团有限公司 | Drill rod fixing and distance-measuring device used for standard penetration test and application method thereof |
| CN105547878A (en) * | 2015-12-19 | 2016-05-04 | 湖南科技大学 | Granite residual soil penetrometer |
-
2013
- 2013-09-25 CN CN201320592765.XU patent/CN203475404U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104060596A (en) * | 2014-06-07 | 2014-09-24 | 中铁上海设计院集团有限公司 | Drill rod fixing and distance-measuring device used for standard penetration test and application method thereof |
| CN104060596B (en) * | 2014-06-07 | 2016-04-06 | 中铁上海设计院集团有限公司 | The application process with range unit fixed by a kind of drilling rod for standard penetration test |
| CN105547878A (en) * | 2015-12-19 | 2016-05-04 | 湖南科技大学 | Granite residual soil penetrometer |
| CN105547878B (en) * | 2015-12-19 | 2017-12-12 | 湖南科技大学 | A kind of granite residual soil pin enters instrument |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20140312 Termination date: 20190925 |