CN101634138A - Routine penetrometer - Google Patents
Routine penetrometer Download PDFInfo
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- CN101634138A CN101634138A CN200910012997A CN200910012997A CN101634138A CN 101634138 A CN101634138 A CN 101634138A CN 200910012997 A CN200910012997 A CN 200910012997A CN 200910012997 A CN200910012997 A CN 200910012997A CN 101634138 A CN101634138 A CN 101634138A
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- China
- Prior art keywords
- load sensor
- penetrometer
- routine
- casing
- transmission shaft
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- 239000000523 sample Substances 0.000 claims abstract description 26
- 230000005540 biological transmission Effects 0.000 claims abstract description 10
- 238000004891 communication Methods 0.000 claims abstract description 8
- 238000013480 data collection Methods 0.000 claims description 10
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 238000005755 formation reaction Methods 0.000 claims 1
- 239000002689 soil Substances 0.000 abstract description 35
- 238000000034 method Methods 0.000 abstract description 12
- 239000004576 sand Substances 0.000 abstract description 7
- 230000002285 radioactive effect Effects 0.000 abstract description 3
- 230000003321 amplification Effects 0.000 abstract description 2
- 238000003199 nucleic acid amplification method Methods 0.000 abstract description 2
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- 235000003140 Panax quinquefolius Nutrition 0.000 description 2
- 240000005373 Panax quinquefolius Species 0.000 description 2
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- 238000006297 dehydration reaction Methods 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 238000004451 qualitative analysis Methods 0.000 description 2
- GUTLYIVDDKVIGB-OUBTZVSYSA-N Cobalt-60 Chemical compound [60Co] GUTLYIVDDKVIGB-OUBTZVSYSA-N 0.000 description 1
- TVFDJXOCXUVLDH-RNFDNDRNSA-N cesium-137 Chemical compound [137Cs] TVFDJXOCXUVLDH-RNFDNDRNSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000005251 gamma ray Effects 0.000 description 1
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Images
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The conventional penetrometer relates to geotechnical engineering mechanics, and comprises: casing, cross-beam, load sensor, transmission shaft, feeler lever, touch probe, data acquisition treater, communication interface, power pack, its characteristic: the bottom of the load sensor fixed in the inner cavity of the machine shell is connected with the transmission shaft, the touch probe rod and the touch probe, when the touch probe is inserted into a soil body, the load sensor generates signal change, the data acquisition processor performs sampling, amplification, calculation and display, and the data acquisition processor performs intelligent processing on the upper computer through the communication interface. The invention is different from the penetrometer, the sand-filling method and the nuclear density meter used in the current engineering, and makes up the defects of the prior art: the method comprises the steps of firstly, drilling and soil taking are disturbed and dehydrated, secondly, nuclear radioactive rays are polluted, secondly, digging a pit and filling sand consume labor and time, thirdly, a spring is used as a force measuring element, error is large, and fifthly, the scale reading value visual error is large, and data cannot be reserved.
Description
Technical field:
A kind of routine penetrometer relates to fields such as the prospecting, design, construction of geotechnical engineering circle, is used for the on-the-spot soil mechanics indexs such as the load power of estimating natural ground, the compaction rate of judging the artificial foundation, water content of describing.
Background technology:
We often touch natural ground and artificial backfill ground in the geotechnical engineering practice, for what the evaluation of the granular size of this class soil body, Density Distribution arrangement, load power, water content, index to its critical condition and ultimate limit state is judged, to directly influence and control the quality of construction work, therefore be the project of vital and lasting importance of state fundamental construction, original state ground and artificial backfill ground carried out that the scene is quantitatively detected on the spot, qualitative analysis is most important.
A is arranged in the existing related techniques: " the miniature penetrometer of electronics " consults Chinese patent: 88216821.1-Shenyang automation research institute produces, its principle: mechanical spring is load-sensing unit, the long 1cm of probe.Its weak point is: error increases behind the spring fatigue, only 1cm is long owing to popping one's head in, and the limited in-situ test at the scene of depth measurement will lean on probing that soil sample is taken out, and has increased native disturbance and fluid loss characteristics.B: " the soil penetration resistance instrument " that the U.S. produces consulted Unite States Standard D1558-99 (2004) U.S. ground experimental material association work, its principle: pure frame for movement, and spring is done load-sensing unit, and rule shows the result.Its weak point is: the collimation error of scale demonstration itself just surpasses ± 5%, spring does that error increases after the load-sensing unit fatigue, rule is shunk back, and the back data disappear and can not keep.C: " nucleon density instrument " is referring to＜earthwork test rule〉book, fragrant, the works such as Tao Xiuzhen, Xu Baimeng of Sheng tree of SL237-1999 the 4th joint-Nanjing Hydraulic Research Institute, its principle: the electronics of using gamma-rays and material atom periphery carries out elastic collision, Compton scattering takes place, the density of the soil body is big more, and the gamma-rays decay is also bigger.So measure the variation that gamma-rays enters soil body front and back intensity, just can calculate the principle of density of the soil body.Its weak point is: because gamma ray projector has cobalt 60 (CO
60) and caesium 137 (CS
137) form, have radiation environment to be had to pollute be well-known to human body, thus to its protection, anti-spoke, special messenger keep an eye on, safety device are very complicated.D: " sand replacement method " is referring to＜earthwork test rule〉book, fragrant, the works such as Tao Xiuzhen, Xu Baimeng of Sheng tree of SL237-1999 second joint-Nanjing Hydraulic Research Institute.Its principle: the sand replacement method of digging pit is the standard sand and the method that weighs of grinding compacted soil that adopts equating volume, volume, calculates the density of the earthwork with this.Its weak point: labour intensity is big, consuming time, expensive, effort.
Summary of the invention:
Design of the present invention provide a kind of volume little, be easy to carry, the device of field control construction quality in the open air: routine penetrometer the objective of the invention is in order to solve problems of the prior art (error increases behind native disturbance that chemical examination causes that 1 has radioactive ray nuclear pollution, 2 probings to fetch earth, dehydration 3 spring fatigues, the collimation error of 4 rules itself, 5 scales shrink back back data disappear can not keep, 6 dig pit that sand replacement method is consuming time to be costed greatly).
The scheme that realizes this purpose is: general-crossbeam-load sensor-power transmission shaft-sounding rod-contact probe-data collection processor-communication interface is combined, and constitutes an on-the-spot instrumentation that detects: routine penetrometer.
Its technical characterictic:
In the top reinforcing of the horizontal Beam of T font, make the contact probe of rigidity drive among the vertical injection soil body of sounding rod.Contact probe is subjected to active force when the soil body thrusts, and the soil body produces a reaction force to contact probe, gets rid of the peripheral friction factor of contact probe to soil, usually the point resistance that acts on contact probe is called the penetration resistance of soil.The soil body is hard more, water content is few more, and density is big more, and intensity is high more, and penetration resistance is also big more.Otherwise also in like manner.We use this principle to select the contact probe of enough rigidity, suitable diameter for use, just can obtain the penetration resistance of different soil properties under the same degree of depth, thereby mechanical index such as the intensity of load of acquisition inside soil body, water content, Density Distribution situation, again this testing result is input to data collection processor and carries out computing, amplification, demonstration, storage, printing formation engineering report, realized intelligent modernized construction quality management.
The characteristics benefit of this programme:
1, replaced the existing mechanical scale value of reading formula penetrometer, avoid the collimation error, improved precision.2, owing to be equipped with the lengthening sounding rod, needn't drill and fetch earth, prospecting on the spot, in-situ test, not dehydration, no disturbance have kept the native state and the soil mechanics index of the soil body.3, seedless detection does not have the radioactive ray nuclear pollution.4, replace sand replacement method, save a large amount of manpower and materials reductions of erection time, did a sand replacement method in the past and want several hrs, only need a few minutes and adopt the present invention to detect a point, the economic benefit social benefit is considerable.5, using the single-chip data acquisition processor has realized: real time dynamic tracing, peak value reservation, mean value computation, directly form engineering report, realized intelligent modernized construction quality management.
Description of drawings
Fig. 1: the mechanical composition part of routine penetrometer:
Among Fig. 1: 1 crossbeam, 2 casings, 3 power packs, 4 data collection processors, 5 load sensors, 6 communication interfaces, 7 power transmission shafts, 8 sounding rods, 9 contact probes.
The specific embodiment:
Fig. 1 is the embodiment that the design invents: a special casing 2; With load sensor 5; Systematically combine its feature with mechanical conductive system (power transmission shaft 7, sounding rod 8, contact probe 9) and data collection processor 4: the bottom that load sensor, casing are being fixed by the inner chamber central authorities that the top of casing is provided with crossbeam, the casing of T font is equipped with and is provided with data collection processor, power pack, casing in displacement power transmission shaft, the casing and is provided with communication interface outward.Load sensor links to each other with power transmission shaft, is connected with sounding rod, contact probe successively again.
Sounding rod among Fig. 1 is designed to single-unit and multi-segment structure according to detecting needs, connects with screw thread, keyway, drift bolt between each section.
Contact probe among Fig. 1, its shape is designed to taper shape as requested, pyramid, cylindrical, three kinds.
Power pack among Fig. 1 is equipped with power pack on the screen in casing, and is general for two kinds of batteries charging, that do not charge.
Data collection processor among Fig. 1 adopts the singlechip controller-high integrated operational amplifier of Low-voltage Low-power, realizes that variable signal to load sensor carries out real-time sampling, comparison, calculating, demonstration and input/output signal is delivered to communication interface.
The course of work of the invention process is: the instrument top is applied a power, load sensor produces stress deformation, by sounding rod with in the contact probe injection soil, survey the physico-mechanical properties of soil layer according to the size of the contact probe point resistance in the injection soil, set up penetration resistance Ps and bearing capacity fa and the compactness λ compression amount of touching E with this
SBetween dependency relation.With conical contact probe is example: the basal cross section of circular cone contact probe is long-pending in penetration process, depth of penetration is relevant with penetration resistance
Formula: P=P
S/ A
In the formula: P
SThe penetration resistance of-the soil body
The specific penetration resistance of P-soil body
The basal cross section of A-conical contact probe amasss (A=F (h))
H-contact probe inserts the depth of penetration in the soil
f
a-allowable bearing capacity of foundation soil (f
a=F (P
S))
E
SThe compression amount of touching of-soil layer
The compactness of λ-soil body
The shear strength of R-soil body
Because therefore specific penetration resistance P can utilize the change curve of specific penetration resistance P along with depth of penetration h along the insertion depth METHOD FOR CONTINUOUS DETERMINATION, and the soil body is carried out the layering qualitative analysis, differentiates cohesive soil, silty clay, sandy soil with this, and then according to penetration resistance P
SDetermine the bearing capacity fa of each bearing stratum, the compression amount of the touching E of soil
S, soil compactness λ, bury shear strength R.
The testing result that load sensor is measured delivers to data collection processor and samples-amplify-store-real time dynamic tracing-peak-peak reservation-mean value calculation-result shows, data are sent to the terminal called interface simultaneously, connect host computer and form engineering report, so far finished a whole set of modernized construction quality and detected and the office intelligent management.
Claims (6)
1, routine penetrometer comprises: formations such as casing, horizontal Beam, load sensor, power transmission shaft, sounding rod, contact probe, data collection processor, communication interface, power pack, it is characterized in that: load sensor and data collection processor, power transmission shaft, sounding rod, contact probe are combined.
2, routine penetrometer according to claim 1 is characterized in that: a T font handle crossbeam is arranged at the top of casing.
3, routine penetrometer according to claim 1 is characterized in that: load sensor is equipped with at the inner chamber middle part of casing.Load sensor is connected with contact probe piecemeal with power transmission shaft, sounding rod again.
4, routine penetrometer according to claim 1 is characterized in that: be provided with in the casing on the housing of data collection processor, power pack, casing communication interface is housed.
5, routine penetrometer according to claim 1 is characterized in that: sounding rod is divided into single-unit and multi-segment structure as required, connects with screw thread, keyway, drift bolt between each section, and the surface of each joint sounding rod is equipped with the displacement graduated scale.
6, routine penetrometer according to claim 1 is characterized in that: contact probe is provided with taper shape, pyramid and cylindrical three kinds as required.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910012997A CN101634138A (en) | 2009-08-07 | 2009-08-07 | Routine penetrometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910012997A CN101634138A (en) | 2009-08-07 | 2009-08-07 | Routine penetrometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101634138A true CN101634138A (en) | 2010-01-27 |
Family
ID=41593457
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910012997A Pending CN101634138A (en) | 2009-08-07 | 2009-08-07 | Routine penetrometer |
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| Country | Link |
|---|---|
| CN (1) | CN101634138A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103926148A (en) * | 2014-04-25 | 2014-07-16 | 太原理工大学 | Static pressure masonry mortar penetrometer |
| WO2023151183A1 (en) * | 2022-02-14 | 2023-08-17 | 南通大学 | Soft clay settlement and liquidity index measurement apparatus and measurement method |
-
2009
- 2009-08-07 CN CN200910012997A patent/CN101634138A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103926148A (en) * | 2014-04-25 | 2014-07-16 | 太原理工大学 | Static pressure masonry mortar penetrometer |
| CN103926148B (en) * | 2014-04-25 | 2016-03-30 | 太原理工大学 | Masonry mortar static pressure penetrometer |
| WO2023151183A1 (en) * | 2022-02-14 | 2023-08-17 | 南通大学 | Soft clay settlement and liquidity index measurement apparatus and measurement method |
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Application publication date: 20100127 |