CN104612125A - Double-wall closed soil sampling method and device for soft soil - Google Patents
Double-wall closed soil sampling method and device for soft soil Download PDFInfo
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- CN104612125A CN104612125A CN201410734318.2A CN201410734318A CN104612125A CN 104612125 A CN104612125 A CN 104612125A CN 201410734318 A CN201410734318 A CN 201410734318A CN 104612125 A CN104612125 A CN 104612125A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D1/00—Investigation of foundation soil in situ
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Abstract
The invention discloses a double-wall closed soil sampling method and device for soft soil. The method comprises the steps that A, double-layer sampling pipes are connected to soil sampler connectors and fixed through pins; B, a double-wall closed soil sampler is placed down into the bottom of a hole and pressed into soil for sampling; C, in the soil sampler pressing-in process, a lifting rod moves downwards along with the soil sampler; D, after the soil sampler is pressed to reach the depth, the soil sampler is pulled out upwards after the sampling pipes are closed; E, after the soil sampler is lifted to the ground, whether the sampling pipes deform or not is detected; F, soil samples are conveyed to a laboratory, closed and kept upright after being sampled out. According to the double-wall closed soil sampling method and device for soft soil, the inner and outer layer sampling pipes are connected with the sampler connectors through the pins, the inner layer sampling pipe is formed by splicing five identical rectangular steel plates along long edges in a contact mode, and a soil breaking piece is located at the lower end of each steel plate and connected with the inner layer sampling pipe through a hinge. The method is easy to implement, operation is easy and convenient, the structure is simple, stability and reliability are achieved, the soil sampling quality is high, and the sampling rate is improved.
Description
Technical field
The present invention relates to soil exploration technical field, more specifically relate to the closed soil basketing method of a kind of double wall for weak soil, also relate to the closed drawing out soil equipment of a kind of double wall for weak soil simultaneously, be applicable to the geotechnical engineering field relevant industries such as Tailings Dam, dam, building and carry out I class weak soil mud sampling, the sample of this standard level can be the physics of weak soil, mechanical test or compartmentalize soil provides test sample.
Background technology
Engineering geologic investigation is for finding out the geologic(al) factor affecting engineering works and the geological survey and research work carried out, for determining to ensure that building stability provides foundation with the safeguard procedures normally used.Along with China's economic construction Requirement and development, and the increasing of the various big-and-middle-sized geotechnical engineering project of in recent years building, the research and development for novel soil sampler have become the major issue that engineering geologic investigation field worker is concerned about.In geological prospecting, want the every physico mechanical characteristic index obtaining soil, at present except expensive in-situ test, after main still dependence drill sampling, carry out indoor centrifugal modeling.Obtain the undisturbed soil sample close to natural structure, key is improve sampling technique and use advanced soil sampler.The quality of soil sampler, the level of disruption directly affecting sampling and the quality fetched earth are the basic guarantees analyzing soil information accuracy.
Weak soil is a kind of great soil group often run in engineering geologic investigation, and the main feature of weak soil is that natural moisture content is high, natural void ratio is large, compressibilty is high, shear strength is low, highly sensitive, perturbation large, soil layer layered distribution is complicated.To there being weak soil to distribute in the geotechnical investigation on stratum, usually need the undisturbed sample analysis to weak soil, with the physics and the mechanical characteristic that make result of the test more meet natural soil layer.So-called undisturbed is a kind of soil sample or rock sample sample not by outer force-disturbance, the structure that maintains the original state in sampling process.Absolutely not disturbed sample exists only in theory, always has a little disturbance in real process, and its level of disruption can be identified from site inspection, mensuration several aspect such as the rate of recovery, experimental evaluation.This disturbance can destroy the natural structure of weak soil, and then has influence on the accuracy of soil body indoor test result.Therefore, be a difficult problem for a long-standing problem industry to the disturbance of the soil body when how as far as possible minimizing weak soil fetches earth.
American-European countries carries out comparatively early in the theoretical research of sampling disturbance, also relatively ripe, and Japan mainly has advantage in the development of undisturbed soil soil sampler, and the thin-wall sampler of current China extensive use is exactly mainly used for reference Japanese correlation experience.For the research of undisturbed soil disturbance, the international soil mechanics Foundation Engineering Conference of Second Committee in 1948 is an important milestone, and in current meeting, international experts and scholars have reached more unified understanding to undisturbed soil disturbance.Special commission once carried out specialty research to boring extracting soil technology studied by the soil sampler that the fifties is set up in last century, and develop the soil sampler of various new, for further developing of undisturbed soil soil sampler has made important contribution.
The current undisturbed soil soil sampler used in geotechnical investigation has many types, as thin wall-type soil sampler, heavy wall formula soil sampler, cutting ring formula soil sampler etc., wherein thin wall-type soil sampler wall thickness only 1.25-2.00mm, generally put device formed by drawing out soil equipment, adsorbent equipment, lifting-Ka, sampling disturbance is little, quality is high, is widely used in geotechnical investigation field.The subject matter existed is, thin wall-type soil sampler how adopts the mode pulling off or twist off that sample soil is separated with subsoil after sampling, so not only easily causes disturbance to sample, and easily causes the bottom soil body to come off, and reducing samples compares; Meanwhile, soil sampler leans on the frictional force of soil sample and tube wall to maintain soil sample completely when upwards extracting sample, also can cause certain disturbance to soil sample; After soil is mentioned ground, the process that sample is released from tube wall, due to soil and the contact friction of tube wall, the Secondary Disturbance of the soil body can be caused again.
Summary of the invention
The object of the invention is to there are provided a kind of for the closed method fetched earth of weak soil double wall, easy to implement the method, easy and simple to handle, adopt the design principle of closed sampling, the anti-soil-shifting disturbance of double-layer tube wall, achieve low disturbance, lowly escape soil, high extract original state weak soil with surveying effect, the method can more economic obtain high-quality undisturbed soil sample, meets the demand of actual geology survey better.
Another object of the present invention be there are provided a kind of for the closed device fetched earth of weak soil double wall, this apparatus structure is simple, durable in use, easy to operate, reliable and stable, soil sampling mass is high, sample soil can be reduced and be separated the disturbance caused with subsoil, and avoid the Secondary Disturbance caused when being released from tube wall by sample, closing the mouth of pipe when carrying soil simultaneously, improve sampling ratio.Its remarkable result is the taking rate drastically increasing weak soil, reduces the remoulding indes in sampling process, is particularly useful for the sampling of original state weak soil, is with a wide range of applications.
In order to realize above-mentioned object, the present invention by the following technical solutions:
In order to overcome conventional soil sampler is subject to disturbance and easily escapes soil shortcoming and defect when weak soil samples, be necessary to design a kind of enclosed, sample than high, perturbation is little and device is simple, the economically viable method that fetches earth and device, for solving when weak soil fetches earth, the bottom soil body when disturbance of the soil body and upper earth extracting device is come off, sample than low technical problem, for the appraisal of research undisturbed soil characteristic and civil engineering provides a kind of research technique and technical support.
For the closed method fetched earth of weak soil double wall, the steps include:
1), use time, outer probe tube, internal layer probe tube are connected on soil sampler joint, adopt connecting pins fix.When fetching earth, make soil sampler joint be positioned at the top of device, promote piston rod from top to bottom, make piston be in bottom probe tube, piston bottom surface flushes with outer probe tube cutting edge, then by hoist for driller, piston rod and borer drill rod is put into soil layer to be sampled simultaneously.Transferring before soil sampler should careful clear hole, soil sampler close to fetch earth the degree of depth time, slowly should decline, avoid pressing down or impacting and make pressurized at the bottom of thief hole, avoid piston to float simultaneously, cause sample not fill soil sampler.Sample appropriate to the occasion according to exploration require and formation characteristics select be suitable for mode of creeping into and whether configure mud, clear water or mud liquid level in hole should be maintained during probing all the time and descend water level above Ground.Clay configuration mud should be used according to situation of creeping into when needing, can adopt Na-CMC (sodium carboxymethyl cellulose) mud under general geological condition, its formula is: high-quality clay for preparing mud 150 ~ 200g, water 1000ml, soda ash 5 ~ 10kg, about Na-CMC6kg.Mud property is: density 1.07 ~ 1.1g/cm
3, viscosity 25 ~ 35s, fluid loss is less than 12ml/30min, pH value about 9.5.For preventing hole wall collapse, answer setting of casing retaining wall if desired, casing length should enter normal stratum, bottom should not be less than 1m.
2), closed for this double wall soil sampler is transferred at the bottom of hole, after arriving sample position, fixed piston rod and piston, to pressing down outer probe tube, internal layer probe tube, outer probe tube, internal layer probe tube opposing pistons bar and piston are moved downward, samples in press-in soil.During soil sampler press-in, require rapidly, continuously and be pressed in soil equably, adhere in order to avoid produce between soil sample and internal layer probe tube inwall and cause disturbance.When press-in speed is crossed slow, (<0.1mm/min) will make to produce between soil sample and internal layer probe tube inwall adhere to and cause serious disturbance.The displacement of Simultaneously test soil sampler press-in length drilling rod relative to piston rod, i.e. soil sampling length.Press-in length can not be excessive, requires that sampling press-in length is within 90% of effective length.Before press-in soil sampler, must ensure that drilling rod is straight, must not bend.Because will increase the disturbance of soil sample with crooked stem press-in soil sampler.In soil sampler process of press in, when pressure reaches drilling rod self limit stress (being generally about 6kN), can there is unstability flexural deformation in drilling rod, for avoiding the appearance of this situation, needs restriction to press down force value.Because weak soil penetration resistance is less, axial compression change is little, and generally getting restriction, to press down force value be 4kN.
3), in process of press in, lifting arm will contact with top land when moving downward, and lifting arm will be subject to piston constraint, with internal layer probe tube inwall generation relative motion, band dynamic circuit breaker soil sheet turns in chamber, cuts off the connection of sample and subsoil, and seal inner chamber, prevent the landing of soil sampling bottom soil body.
4), after device fills soil sample, static 10min, upwards extracts soil sampler after producing adhesion and frictional resistance between soil sample and internal layer probe tube inwall again.Work speed of pulling out and want slow, steady, must not percussion device in lifting process.
5), this device is promoted to ground after, must check that outer probe tube, internal layer probe tube are with or without distortion, probe tube without distortion the sample prescription that fetches earth be qualified soil sample.After qualified weak soil sample obtains, need on-the-spot record soil sample length and carry out soil sample numbering.
6), soil sample generally needs to be transported to laboratory after taking out, soil sample transport and storage time should be full cylinder (need fill up with rubber piston time discontented, so as not to rock and by disturbance), seal and keep erectting, avoid vibration and variations in temperature sharply.Under soil sample should be stored in the temperature (when former environment temperature is failed to understand desirable 20 DEG C) same with original environment facies and humidity (when former ambient humidity is failed to understand desirable 40%).After soil sample arrives test room, undisturbed soil test should be carried out as early as possible, in order to avoid the time effect of soil sample is to the raw disturbing influence of local products.Extracted out downwards vertically by outer probe tube 2 when taking out soil sample before test in device, outer probe tube 1 is radially peeled off, and namely obtains disturbing less weak soil sample.
This method can reduce the disturbance in the process of fetching earth preferably, keeps the original state characteristic of weak soil, and that avoids conventional soil sampler to carry often occurring in native process escapes native phenomenon, improves the sampling ratio of weak soil.Compared with existing conventional soil sampler soil basketing method, the present invention adopts and soil sampling is cut off the connection that the mode be separated disconnects sample and subsoil in the process of fetching earth, to break soil and to rotate the disturbance of disconnected soil much little than drawing, and effectively prevent at soil sampling lifting process and escape native phenomenon.And double walled sampling method, then avoid Secondary Disturbance during soil sampling, effective guarantee original proterties of sample.
The closed drawing out soil equipment of double wall for weak soil, comprises outer probe tube, internal layer probe tube, disconnected native sheet, lifting arm, connecting rod, piston, piston rod, pin and soil sampler joint.Its annexation is: outer probe tube is the casting of steel integral hollow positive pentagonal prism shape tubulose, adopts connecting pins to be fixed on soil sampler joint.Outer probe tube is positioned at the outermost layer of device, contacts with internal layer probe tube is adherent.Outer probe tube total length exceedes the 3cm ~ 5cm of interior probe tube 2 length, and every EDS maps has three pin holes, and outer probe tube is connected via pin with internal layer probe tube, is connected with internal layer probe tube via the pin of pin in hole; Internal layer probe tube to be contacted along its long limit by five blocks of identical rectangle steel plates and is spliced, spell well also in the positive pentagonal prism shape of hollow, and just can be embedded in outer probe tube, and being together fixed on soil sampler joint bottom, piston can along the upper and lower contact slide of internal layer probe tube inwall.The every block plate of internal layer probe tube all leaves three pin holes, communicate with the hole on outer probe tube.The every block plate of internal layer probe tube is all furnished with lifting arm, connecting rod and disconnected native sheet (see Fig. 2), internal layer probe tube inwall has the through-hole structure of protrusion vertically, lifting arm is connected with connecting rod through through-hole structure, connecting rod is articulated with disconnected native sheet by the hinged constraint of disconnected native sheet steel plate medial center position, and disconnected native sheet is connected in the lower end of the every block plate of internal layer probe tube by hinge; Disconnected native sheet is triangle strip shear-steel plate, can along with the rising of lifting arm inward collapsible; Connecting rod is steel thin bar, and lower end is articulated with disconnected native sheet, and connecting rod upper end thereof, in lifting arm, plays the effect connecting disconnected native sheet and lifting arm; Lifting arm is that steel is shaft-like, acts on similar latch, and top is bending, lifting arm bottom and lifting arm hinged, by the through-hole structure limiting horizontal movements on internal layer probe tube steel plate and can oscilaltion; Piston is connected with piston-rod lower end, is close to internal layer probe tube, and edge leaves the aperture allowing lifting arm and through-hole structure pass through, and can move up and down at internal layer probe tube inwall; Soil sampler joint is positioned at the topmost of soil sampler, is provided with steam vent, is connected and fixed, soil sampler connector center position reserving hole by pin and outer probe tube, internal layer probe tube top, and piston rod is connected with piston through this hole.
The closed soil sampler of above-mentioned double wall, be characterized in: outer probe tube is connected with soil sampler joint via pin with internal layer probe tube, during lower sample, outer probe tube is extracted out downwards vertically, internal layer probe tube is radially peeled off, its beneficial effect is, by dismounting probe tube, soil is taken out, Secondary Disturbance can not be produced to soil sample.
The closed soil sampler of above-mentioned double wall, be characterized in: lifting arm is connected with disconnected native sheet by a connecting rod, disconnected native sheet is equilateral triangle, can around while freely rotate at axial direction, end belt sword, its beneficial effect is, lifting arm and disconnected native sheet can be allowed to link, realize the effect of disconnected soil and closed port.
The closed soil sampler of above-mentioned double wall, is characterized in: whole device is positive pentagonal prism shape, and its beneficial effect is, compared with cylinder, disconnected native sheet is more easily close to wall.
The closed soil sampler of above-mentioned double wall, is characterized in: after piston contacts with lifting arm, and lifting arm and piston link, and its beneficial effect is, structure is simple, does not need to add special power set in addition.
The closed soil sampler of above-mentioned double wall, be characterized in: lifting arm inside internal layer probe tube, piston movement to during certain position and piston interlock, its beneficial effect is, be located at outside internal layer probe tube compared to lifting arm, lifting arm of being more convenient for directly contacts with piston.
The closed soil sampler of above-mentioned double wall, is characterized in: the thickness of every layer of thin-wall sampling pipe is about 1.00-1.25mm, and the gross thickness of two-layer probe tube is about 2.00-2.50mm.
Above-mentioned soil sampler feature is: lifting arm climb l
1, connecting rod length l
2with the vertical distance l of disconnected native sheet two about interfascicular
3meet relational expression
its beneficial effect is, when lifting arm 4 rises to extreme higher position, disconnected native sheet 3 is just in time positioned at horizontal level, by internal layer probe tube 2 bottom end closure.
The closed drawing out soil equipment of the double wall designed by above Scheme and Measures is a kind of multi-method integrating device for weak soil.The closed drawing out soil equipment of this double wall not only efficiently solve conventional apparatus weak soil break soil time the bottom soil body when disturbance of the soil body and upper earth extracting device is come off, samples than low technical problem, and solve conventional apparatus bulldoze sampling time produce Secondary Disturbance, affect the problem of undisturbed sample quality, provide technical support for obtaining I class original state weak soil.
The present invention compared with prior art, has the following advantages and effect:
The closed soil basketing method of a kind of double wall for weak soil of the present invention's design and device, adopt the design principle of closed sampling, the anti-soil-shifting disturbance of double-layer tube wall, utilize mechanical force when being pressed into soil sampler to cut off sample in pipe to be connected with the soil body, during lifting soil sampler, in enclosed cavity, the soil body is run away to avoid soil sample, when soil sample is taken out on ground with the friction replacement soil body between two-layer tube wall and the friction between tube wall.Sample is being taked be subject to various disturbing influence in process, comprises impact that is artificial, machinery and unpredictable factor, as press-in disturbance, cuts sample disturbance, soil-shifting disturbance etc.When adopting traditional soil sampler, realizing disconnected soil, destroy the prototype structure of the coupling part soil body by drawing or the mode that twists off, in the organ pipe that makes to fetch earth there is the structural disturbance of local in the soil body.Meanwhile, traditional soil sampler, in upper earth extracting device process, main relies on the friction between tube wall and soil sample to stop to escape soil, and this also can cause certain disturbance to weak soil, and causes and escape native phenomenon in lifting process; After soil is mentioned ground, the process that sample is released from tube wall, due to soil and the contact friction of tube wall, the Secondary Disturbance of the soil body can be caused again.The closed drawing out soil equipment of the double wall for weak soil that the present invention proposes, adopt the design principle of closed sampling, the anti-soil-shifting disturbance of double-layer tube wall, structure is simple, durable in use, easy to operate, reliable and stable, soil sampling mass is high, sample soil can be reduced and be separated the disturbance caused with subsoil, and the Secondary Disturbance caused when avoiding sample to release from tube wall, closing the mouth of pipe when carrying soil simultaneously, improve sampling ratio.Its remarkable result is the taking rate drastically increasing weak soil, reduces the remoulding indes in sampling process, is particularly useful for the sampling of original state weak soil, is with a wide range of applications, will meet the demand of actual geology survey better.
Fig. 1, Fig. 2, Fig. 3 are the structure principle chart of the closed drawing out soil equipment of double wall, and wherein Fig. 1 is the closed drawing out soil equipment overall schematic of double wall, Fig. 2 to be internal layer probe tube structural pipe wall figure, Fig. 3 be soil sampler breaks when native sheet closes up port generalized section.In figure: the outer probe tube of 1-; 2-internal layer probe tube; 3-breaks native sheet; 4-lifting arm; 5-connecting rod; 6-piston; 7-piston rod; 8-pin; 9-soil sampler joint.The thickness of every layer of thin-wall sampling pipe is about 1.00-1.25mm, and the gross thickness of two-layer probe tube is about 2.00-2.50mm.Lifting arm climb l
1, connecting rod length l
2with disconnected native sheet two about interfascicular vertical distance l
3meet relational expression
Accompanying drawing explanation
Fig. 1 is the closed drawing out soil equipment overall schematic of double wall.
Fig. 2 is internal layer probe tube structural pipe wall figure;
Fig. 3 is that soil sampler breaks native sheet port generalized section when closing up;
Wherein: 1. outer probe tube, 2. internal layer probe tube, 3. disconnected native sheet, 4. lifting arm, 5. connecting rod, 6. piston, 7. piston rod, 8. pin, 9. soil sampler joint.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described.
Embodiment 1:
The closed soil basketing method of double wall for weak soil, the steps include:
1), when using, outer probe tube 1, internal layer probe tube 2 are connected on soil sampler joint 9, adopt connecting pins 8 to fix.When fetching earth, make soil sampler joint 9 be positioned at the top of device, promote piston rod 7 from top to bottom, make piston 6 be in bottom probe tube, piston 6 bottom surface flushes with outer probe tube 1 cutting edge, then by hoist for driller, piston rod 7 and borer drill rod is put into soil layer to be sampled simultaneously.Transferring before soil sampler should careful clear hole, soil sampler close to fetch earth the degree of depth time, slowly should decline, avoid pressing down or impacting and make pressurized at the bottom of thief hole, avoid piston 6 to float simultaneously, cause sample not fill soil sampler.Sample appropriate to the occasion according to exploration require and formation characteristics select be suitable for mode of creeping into and whether configure mud, clear water or mud liquid level in hole should be maintained during probing all the time and descend water level above Ground.Clay configuration mud should be used according to situation of creeping into when needing, can adopt Na-CMC (sodium carboxymethyl cellulose) mud under general geological condition, its formula is: high-quality clay for preparing mud 150 ~ 200g, water 1000ml, soda ash 5 ~ 10kg, about Na-CMC6kg.Mud property is: density 1.07 ~ 1.1g/cm
3, viscosity 25 ~ 35s, fluid loss is less than 12ml/30min, pH value about 9.5.For preventing hole wall collapse, answer setting of casing retaining wall if desired, casing length should enter normal stratum, bottom should not be less than 1m.
2), closed for this double wall soil sampler is transferred at the bottom of hole, after arriving sample position, fixed piston rod 7 and piston 6, to pressing down outer probe tube 1, internal layer probe tube 2, outer probe tube 1, internal layer probe tube 2 opposing pistons bar 7 and piston 6 are moved downward, samples in press-in soil.During soil sampler press-in, require rapidly, continuously and be pressed in soil equably, adhere in order to avoid produce between soil sample and internal layer probe tube 2 inwall and cause disturbance.When press-in speed is crossed slow, (<0.1mm/min) will make to produce between soil sample and internal layer probe tube 2 inwall adhere to and cause serious disturbance.The displacement of Simultaneously test soil sampler press-in length drilling rod relative to piston rod 7, i.e. soil sampling length.Press-in length can not be excessive, requires that sampling press-in length is within 90% of effective length.Before press-in soil sampler, must ensure that drilling rod is straight, must not bend.Because will increase the disturbance of soil sample with crooked stem press-in soil sampler.In soil sampler process of press in, when pressure reaches drilling rod self limit stress (being generally about 6kN), can there is unstability flexural deformation in drilling rod, for avoiding the appearance of this situation, needs restriction to press down force value.Because weak soil penetration resistance is less, axial compression change is little, and generally getting restriction, to press down force value be 4kN.
3), in process of press in, lifting arm 4 when moving downward will with piston 6 top contact, lifting arm 4 will be subject to piston 6 and retrain, with internal layer probe tube 2 inwall generation relative motion, band dynamic circuit breaker soil sheet 3 turns in chamber, cut off the connection of sample and subsoil, and seal inner chamber, prevent the landing of soil sampling bottom soil body.
4), after device fills soil sample, static 10min, upwards extracts soil sampler after producing adhesion and frictional resistance between soil sample and internal layer probe tube 2 inwall again.Work speed of pulling out and want slow, steady, must not percussion device in lifting process.
5), this device is promoted to ground after, must check that outer probe tube 1, internal layer probe tube 2 are with or without distortion, probe tube without distortion the sample prescription that fetches earth be qualified soil sample.After qualified weak soil sample obtains, need on-the-spot record soil sample length and carry out soil sample numbering.
6), soil sample generally needs to be transported to laboratory after taking out, soil sample transport and storage time should be full cylinder (need fill up with rubber piston time discontented, so as not to rock and by disturbance), seal and keep erectting, avoid vibration and variations in temperature sharply.Under soil sample should be stored in the temperature (when former environment temperature is failed to understand desirable 20 DEG C) same with original environment facies and humidity (when former ambient humidity is failed to understand desirable 40%).After soil sample arrives test room, undisturbed soil test should be carried out as early as possible, in order to avoid the time effect of soil sample is to the raw disturbing influence of local products.Extracted out downwards vertically by outer probe tube 2 when taking out soil sample before test in device, outer probe tube 1 is radially peeled off, and namely obtains disturbing less weak soil sample.
This method can reduce the disturbance in the process of fetching earth preferably, keeps the original state characteristic of weak soil, avoids carrying escaping native phenomenon in native process, improves the sampling ratio of weak soil.Compared with conventional soil sampler, this method adopts disconnected native sheet separating sample to be connected with subsoil, breaks native little with the disturbance of the disconnected soil of rotation, and effectively avoid escaping native phenomenon at lifting process than drawing.And the design of double-deck probe tube, then avoid Secondary Disturbance during sampling, effective guarantee original proterties of sample.
Embodiment 2:
The closed device fetched earth of double wall for weak soil, comprises outer probe tube 1, internal layer probe tube 2, disconnected native sheet 3, lifting arm 4, connecting rod 5, piston 6, piston rod 7, pin 8, soil sampler joint 9.Its annexation is: outer probe tube 1 is the casting of steel integral hollow positive pentagonal prism shape tubulose, outer probe tube 1 is connected with the bottom of soil sampler joint 9, be positioned at the outermost layer of device, outer probe tube 1 contacts with internal layer probe tube 2, three pin 8 holes are all left in every face, length exceedes internal layer probe tube 2, and outer probe tube 1 is connected via pin 8 with internal layer probe tube 2; Internal layer probe tube 2 to be contacted along long limit by 5 blocks of identical rectangle steel plates and is spliced, spell good after also in the positive pentagonal prism of hollow, and just can be embedded in outer probe tube, and together be fixed on device bottom, piston 6 can along the upper and lower contact slide of steel plate inwall.Every block plate all leaves three pin 8 holes, hinge is established in lower end, and inwall has the through-hole structure of protrusion, and is furnished with a lifting arm 4, connecting rod 5 and segment soil sheet 3; Disconnected native sheet 3 is positioned at the lower end of every block plate, for triangle strip shear-steel plate, be connected with internal layer probe tube 2 by hinge, there is a hinged constraint medial center position of plate, connect for connecting rod 5, and the hinged lifting arm of connecting rod 5, like this, disconnected native sheet 3 just can along with the rising of lifting arm inward collapsible; Connecting rod 5 is steel thin bar (diameter is 2mm or 3mm), the hinged disconnected native sheet 3 in connecting rod 5 lower end, upper end thereof lifting arm 4, plays the effect connecting disconnected native sheet 3 and lifting arm 4; Lifting arm 4 is that steel is shaft-like, acts on similar latch, and lifting arm 4 top is bending, lifting arm 4 bottom and lifting arm hinged, by the through hole limiting horizontal movements on internal layer probe tube 2 steel plate and can oscilaltion; Piston 6 is connected with piston rod 7 lower end, is close to internal layer probe tube 2, and edge leaves the aperture allowing lifting arm 4 and through hole pass through, and can move up and down at internal layer probe tube 2; Soil sampler joint 9 is positioned at the topmost of device, is provided with steam vent, and be connected and fixed by pin 8 and outer probe tube 1, internal layer probe tube 2, core has the hole of piston rod bar 7 footpath size.Whole apparatus design becomes positive pentagonal prism, is conducive to the laminating of disconnected native sheet 3 and tube wall like this; Tube wall has two layers, outer probe tube 1 is connected with soil sampler joint 9 via screw with internal layer probe tube 2, unload outer probe tube 1 when getting to extract out downwards vertically, internal layer probe tube 2 is radially peeled off, and outer probe tube 1 plays effect that is fixing and protection internal layer probe tube 2; Lifting arm 4 inside internal layer probe tube 2, when piston 6 moves to certain position and piston interlock, band dynamic circuit breaker soil sheet 3 close the mouth of pipe; Lifting arm 4 is fixed on wall, can only move up and down vertically, and disconnected native sheet 3 is equilateral triangle, can around freely rotating at axial direction, and end belt sword is beneficial to cut off soil sample.It should be noted that lifting arm climb l
1, connecting rod length l
2with disconnected native sheet two about interfascicular vertical distance l
3meet relational expression
Claims (4)
1., for the closed method fetched earth of double wall of weak soil, the steps include:
A), during use, by outer probe tube (1), internal layer probe tube (2) is connected on soil sampler joint (9), when fetching earth, soil sampler joint (9) is made to be positioned at the top of device, promote piston rod (7) from top to bottom, piston (6) is made to be in bottom probe tube, piston (6) bottom surface flushes with outer probe tube (1) cutting edge, by hoist for driller, piston rod (7) and borer drill rod are put into soil layer to be sampled simultaneously, clear hole before transferring soil sampler, soil sampler is when fetching earth the degree of depth, slow decline, mode of creeping into and configuration mud is selected according to exploration and stratum during sampling, all the time maintain clear water or mud liquid level in hole during probing and descend water level above Ground, clay configuration mud is used according to situation of creeping into, pulping water must not use has corrosivity or contaminated water, casing length enters normal stratum, bottom and is no less than 1m,
B), closed for double wall soil sampler is transferred at the bottom of hole, after arriving sample position, fixed piston rod (7) and piston (6), to pressing down outer probe tube (1), internal layer probe tube (2), make outer probe tube (1), internal layer probe tube (2) opposing pistons bar (7) and piston (6) move downward, sample in press-in soil, during soil sampler press-in, fast, be pressed into continuously and equably in soil, measure the displacement of soil sampler press-in length and piston rod (7) relative drilling rod, soil sampling length, press-in length can not be excessive, sampling press-in length is within 90% of effective length, before press-in soil sampler, drilling rod is straight, must not bend,
C), in process of press in, lifting arm (4) when moving downward will with piston (6) top contact, lifting arm (4) will be subject to piston 6 and retrain, with internal layer probe tube (2) inwall generation relative motion, band dynamic circuit breaker soil sheet (3) turns in chamber, cuts off the connection of sample and subsoil, and seals inner chamber;
D), after device is pressed onto desired depth, static 10min, upwards extracts soil sampler after producing adhesion and frictional resistance between soil sample and internal layer probe tube (2) inwall again, works speed of pulling out and wants slow, steady, must not clash into this device in lifting process;
E), after this device is promoted to ground, check that outer probe tube (1), internal layer probe tube (2) are with or without distortion, probe tube is qualified soil sample without the sample prescription that fetches earth of distortion, and after qualified weak soil sample obtains, on-the-spot record soil sample length also carries out soil sample numbering;
F), soil sample is transported to laboratory after taking out, soil sample transport and storage time should be full cylinder, sealing erectting, under soil sample is stored in the temperature same with original environment facies and relative humidity, after soil sample arrives test room, undisturbed soil test is carried out, extracted out downwards vertically by outer probe tube (2) when taking out soil sample before test in device, outer probe tube (1) is radially peeled off, and obtains weak soil sample.
2. the closed device fetched earth of a kind of double wall for weak soil according to claim 1, comprise outer probe tube (1), lifting arm (4), connecting rod (5), piston (6), piston rod (7), soil sampler joint (9), it is characterized in that: outer probe tube (1) is steel integral hollow positive pentagonal prism shape tubulose, outer probe tube (1) is connected with the bottom of soil sampler joint (9), be positioned at the outermost layer of device, outer probe tube (1) contacts with internal layer probe tube (2), three pin (8) holes are all left in every face, length exceedes internal layer probe tube (2), outer probe tube (1) is connected via pin (8) with internal layer probe tube (2), internal layer probe tube (2) contacts splicing by five blocks of identical rectangle steel plates along long limit, spell good rear in the positive pentagonal prism of hollow, embed outer probe tube (1), and be together fixed on soil sampler joint (9) bottom, every block plate all leaves three pin (8) holes, hinge is established in lower end, inwall has the through-hole structure of protrusion, and be furnished with a lifting arm (4), a connecting rod (5) and segment soil sheet (3), disconnected native sheet (3) is positioned at the lower end of every block plate, for triangle strip shear-steel plate, be connected with internal layer probe tube (2) by hinge, piston (6) is connected with piston rod (7) lower end, soil sampler joint (9) is positioned at the topmost of device, be provided with steam vent, by pin (8) and outer probe tube (1), internal layer probe tube (2) is connected and fixed, outer probe tube (1) is connected with soil sampler joint (9) via screw with internal layer probe tube (2), lifting arm (4) is in internal layer probe tube (2) inner side, lifting arm (4) is fixed on wall.
3. the closed device fetched earth of a kind of double wall for weak soil according to claim 2, it is characterized in that: described connecting rod (5) is steel thin bar, the hinged disconnected native sheet (3) in connecting rod (5) lower end, upper end thereof lifting arm (4), lifting arm (4) is steel shank, its top is bending, bottom and lifting arm hinged.
4. the closed device fetched earth of a kind of double wall for weak soil according to claim 2, is characterized in that: described disconnected native sheet (3) is equilateral triangle.
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|---|---|---|---|---|
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86205547U (en) * | 1986-08-05 | 1987-05-27 | 交通部第三航务工程勘察设计院 | Triplex pipe soil sampler with flap door |
| CN86206707U (en) * | 1986-09-03 | 1987-09-30 | 云南省地质矿产局探矿机械修配厂 | Lifting basket free-valve type soft soil sampler |
| CN101140201A (en) * | 2007-10-09 | 2008-03-12 | 水利部交通部电力工业部南京水利科学研究院 | Water pressure type thin-wall sampler used for soft soil |
| CN201433761Y (en) * | 2009-07-02 | 2010-03-31 | 辽宁省水土保持研究所 | Original soil sample collecting device |
-
2014
- 2014-12-04 CN CN201410734318.2A patent/CN104612125B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86205547U (en) * | 1986-08-05 | 1987-05-27 | 交通部第三航务工程勘察设计院 | Triplex pipe soil sampler with flap door |
| CN86206707U (en) * | 1986-09-03 | 1987-09-30 | 云南省地质矿产局探矿机械修配厂 | Lifting basket free-valve type soft soil sampler |
| CN101140201A (en) * | 2007-10-09 | 2008-03-12 | 水利部交通部电力工业部南京水利科学研究院 | Water pressure type thin-wall sampler used for soft soil |
| CN201433761Y (en) * | 2009-07-02 | 2010-03-31 | 辽宁省水土保持研究所 | Original soil sample collecting device |
Cited By (20)
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|---|---|---|---|---|
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| CN105954059A (en) * | 2016-06-01 | 2016-09-21 | 青岛农业大学 | Convenient undisturbed soil taking device |
| CN106769177A (en) * | 2016-11-25 | 2017-05-31 | 吉林大学 | Portable shallow layer soft soil original state sampling device and sampling method |
| CN106769177B (en) * | 2016-11-25 | 2019-03-05 | 吉林大学 | Portable shallow layer soft soil original state sampling device and sampling method |
| CN106640064A (en) * | 2016-11-29 | 2017-05-10 | 浙江泰克松德能源科技有限公司 | Rock sample extraction device and method for logging tool |
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| CN106680033A (en) * | 2016-12-23 | 2017-05-17 | 上海岩土工程勘察设计研究院有限公司 | Static cone penetration test type underground water sampling method |
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| CN109655308B (en) * | 2019-01-31 | 2024-01-30 | 中国地质大学（武汉） | Portable detachable open soil sampler suitable for silt weak soil |
| CN109975063A (en) * | 2019-04-03 | 2019-07-05 | 安徽省农业科学院棉花研究所 | A kind of portable stratified soil sampler of effort-saving |
| CN109916655B (en) * | 2019-04-18 | 2021-09-17 | 海检检测有限公司 | Carrying type deep sea sediment sampler of underwater vehicle |
| CN109916655A (en) * | 2019-04-18 | 2019-06-21 | 国家深海基地管理中心 | Underwater research vehicle carrying type deep sea sediment sampler |
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| CN117345227B (en) * | 2023-12-05 | 2024-03-12 | 山东黄金集团国际矿业开发有限公司 | Soil sampling device for geological survey |
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