CN107560884B - Integrated device for cross plate test and sampling and use method - Google Patents
Integrated device for cross plate test and sampling and use method Download PDFInfo
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- CN107560884B CN107560884B CN201710938826.6A CN201710938826A CN107560884B CN 107560884 B CN107560884 B CN 107560884B CN 201710938826 A CN201710938826 A CN 201710938826A CN 107560884 B CN107560884 B CN 107560884B
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- 238000012360 testing method Methods 0.000 title claims abstract description 46
- 238000005070 sampling Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000002689 soil Substances 0.000 claims abstract description 57
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000011148 porous material Substances 0.000 claims abstract description 28
- 238000005553 drilling Methods 0.000 claims abstract description 19
- 238000011010 flushing procedure Methods 0.000 claims description 15
- 239000012530 fluid Substances 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 4
- 238000005527 soil sampling Methods 0.000 claims description 3
- 238000004806 packaging method and process Methods 0.000 claims description 2
- 238000010008 shearing Methods 0.000 description 8
- 238000007789 sealing Methods 0.000 description 7
- 239000007788 liquid Substances 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 4
- 238000011065 in-situ storage Methods 0.000 description 4
- 230000005489 elastic deformation Effects 0.000 description 3
- 238000011835 investigation Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000004018 waxing Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/30—Assessment of water resources
Landscapes
- Sampling And Sample Adjustment (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses an integrated device for cross plate test and sampling and a use method thereof, wherein the device comprises the following components: the upper end of the cylinder body can be connected with the drill rod; the lifting motor is fixedly arranged in the cylinder; the screw rod is connected with the lifting motor and matched with a nut fixed in the cylinder body; the torsion motor is connected to the lower end of the screw rod; the cross plate head is connected with the torsion motor through a shaft lever; the sampling tube is detachably arranged at the lower end of the cylinder body. The invention can not only obtain undisturbed soil samples, but also finish on-site cross plate test, even further can also measure the pore water pressure of the natural soil body at the same time, thereby achieving the purposes of multiple functions of drilling and reducing the exploration cost. According to the invention, the lifting motor and the torsion motor are arranged in the cylinder body at the lower end of the drill rod, and the cross plate head is connected nearby, so that a more real shear strength value of a natural soil body can be obtained.
Description
Technical Field
The invention relates to the technical field of geotechnical engineering investigation, in particular to an integrated device for a cross plate test and sampling.
Background
In engineering geological exploration, physical and mechanical indexes of soil are required to be obtained, and are mainly obtained by means of an indoor test of drilling sampling. However, during sampling, friction exists between the soil sample and the inner wall of the sampling tube; during the indoor test, the soil sample and the sampling tube are rubbed again in the bulldozing process, so that the stress is relaxed and then compressed, and the obtained mechanical strength index is distorted. The cross plate shearing test is to apply torsion to the cross plate head inserted into the soil in site, so that the cross plate head is twisted at medium speed in the soil until the soil is sheared, and the maximum torque formed on the surface of the cylinder body during rotation is measured, thereby calculating the value of the non-drainage shearing strength c u of the soil. The former can obtain relatively real physical data; the latter can give a true mechanical strength index. In the existing operation mode, firstly, holes are drilled in a field to be tested, then, a soil sampler is put into the holes for sampling or a cross plate head is put into the holes for carrying out an in-situ test, and how to drill holes once, so that an undisturbed soil sample can be obtained, and a cross plate shearing test can be completed.
In the prior art, a partially similar solution is disclosed, for example, a 'cross plate shear apparatus for survey' is disclosed in the Chinese patent application No. 201110132843.3, and a sealed protection sleeve is sleeved outside a main shaft, so that the lower end of the protection sleeve is fixedly connected on a cross plate, and a working main shaft does not rub with soil during torsion, thereby improving the test measurement accuracy of the cross plate.
In addition, chinese patent No. 104458445A discloses an in-situ soil body in-hole shear test device and test method, wherein a drilling machine is used for drilling holes, then the test device is placed at the bottom of the holes, and air pressure is applied to drive a shear cylinder to bulge so as to solidify soil bodies; and applying hydraulic pressure to drive the shearing knife to shear the soil body, so that the soil body is sheared and damaged, and calculating to obtain the shear strength index of the in-situ soil body.
In the technology, the former cross plate shearing test aims at the drill rod to apply pressure, and the sensor replaces the traditional test method, so that the reading accuracy of the measured soil body resistance torque is improved. In reality, a cross plate shearing instrument on the ground or a platform applies torque to one end of a drill rod to transmit the torque to a far-end cross plate head, elastic deformation such as bending or twisting and the like can be generated, and part of friction between the drill rod and a hole wall is generated, and the longer the hole is, the larger the elastic deformation is, so that the obtained cross plate test data is distorted. The latter makes full use of drilling and adopts an in-situ soil body in-hole shearing method to obtain the natural strength index of the soil, but cannot synchronously obtain physical indexes such as the water content, the pore ratio and the like of the soil and the pore water pressure.
Along with the continuous extension of foundation depths of geotechnical engineering buildings, bridges, wharfs, artificial island tunnels and the like, a comprehensive device for synchronously completing sampling, cross plate testing and measuring pore water pressure with low cost and high quality is increasingly expected.
Disclosure of Invention
The invention aims to solve the technical problem of providing an integrated device for cross plate test and sampling, which can be used for sampling and performing cross plate shearing test, so as to realize multiple functions of one drill and overcome the defects of the prior art.
In order to solve the technical problems, the invention adopts the following technical scheme: an integrated device for cross plate testing and sampling, comprising the following components: the upper end of the cylinder body can be connected with the drill rod; the lifting motor is fixedly arranged in the cylinder; the screw rod is connected with the lifting motor and matched with a nut fixed in the cylinder body; the torsion motor is connected to the lower end of the screw rod; the cross plate head is connected with the torsion motor through a shaft lever; the sampling tube is detachably arranged at the lower end of the cylinder body.
Preferably, the device further comprises a control device, and the lifting motor and the torsion motor are connected with the control device.
More preferably, a pore water pressure sensor is arranged at the lower end of the cross plate head, and the pore water pressure sensor is also connected with the control device.
More preferably, a torque sensor is mounted on the shaft, and the torque sensor is also connected with the control device.
Preferably, the centers of the screw rod, the shaft rod and the cross plate head are all provided with through holes for the power cables to pass through.
Preferably, a diaphragm plate is arranged in the cylinder body, the lifting motor is fixed on the diaphragm plate, and a through hole for the screw rod to pass through is formed in the diaphragm plate.
More preferably, the diaphragm divides the inner cavity of the cylinder body into an upper cavity and a lower cavity, and the diaphragm is also provided with a water outlet hole communicated with the upper cavity and the lower cavity.
More preferably, a sealing gasket capable of sealing the water outlet is fixed at the upper end of the torsion motor.
The invention also provides a using method of the integrated device for the cross plate test and the sampling, which comprises the following steps:
A. Firstly, drilling holes to the designed depth at the exploration point by using a drilling machine, then connecting the integrated device of the invention to the lower end of a drill rod, and placing the integrated device into the bottom of the holes;
B. Then, starting the lifting motor to drive the screw rod to rotate, so that the torsion motor and the cross plate head move downwards together until the cross plate head is inserted into a set depth; then, performing a cross plate test, starting a torsion motor to drive a cross plate head to rotate, and measuring the torsion moment of the cross plate head in an undisturbed soil body by a torque sensor arranged on a shaft lever; measuring the torsion moment of the cross plate head in the disturbance soil;
C. After the cross plate test is completed, starting the lifting motor to reversely rotate, so that the torsion motor and the cross plate head move upwards together and return to the upper part of the sampling tube; injecting flushing fluid into the inner cavity of the cylinder body to the bottom of the hole along the drill rod, and flowing out from the position between the outside of the cylinder body and the hole wall, wherein soil particles at the bottom of the hole gradually flow to the outside of the hole along with the flushing fluid, and the flushing fluid repeatedly lifts and impacts along with the drill rod, so that soil bodies in a disturbance area formed after the cross plate test are washed away until the bottom of the hole is positioned on original soil bodies;
D. The drilling machine adopts a pressing method or a hammering method to penetrate the sampling tube at the lower end of the cylinder body into the soil to finish undisturbed soil sampling, and finally the drilling machine lifts the drill rod until the integrated device is lifted to the ground, the sampling tube is taken down, and the packaging treatment is carried out.
Preferably, a pore water pressure sensor is further installed at the lower end of the cross plate head, and in the step B, after the cross plate head is inserted to a set depth, pore water pressure values are measured first, and then a cross plate test is performed.
Compared with the prior art, the invention has the following beneficial effects:
(1) The invention skillfully integrates the cross plate test device and the sampling device, not only can obtain an undisturbed soil sample, but also can finish the on-site cross plate test, and even further can simultaneously measure the pore water pressure of the natural soil body, thereby achieving the purposes of drilling multiple functions and reducing the exploration cost.
(2) According to the invention, the lifting motor and the torsion motor are arranged in the cylinder body at the lower end of the drill rod, and the cross plate head is closely connected by the torsion motor, so that the defect of data distortion caused by torsion elastic deformation generated by torque transmission through the drill rod in the prior art is eliminated, and a more real natural soil shear strength value can be obtained.
(3) The invention can greatly improve the test precision under the control of the control device; not only meets the existing Chinese geotechnical engineering investigation specification, but also meets the European and American common investigation specification requirements.
Drawings
FIG. 1 is a schematic view of the overall structure of an integrated device for cross-plate testing and sampling according to the present invention.
FIG. 2 is a schematic exploded view of an integrated device for cross-plate testing and sampling according to the present invention.
Fig. 3 is a schematic view showing a state of the integrated device of the present invention when performing a cross plate test.
Fig. 4 is a schematic drawing showing the removal of the sampling tube of the integrated device of the present invention.
Fig. 5 is a schematic exploded view of the pore water device in the integrated device of the present invention.
FIG. 6 is a schematic operation flow diagram of the method of using the integrated device of the present invention.
The reference numerals in the figures illustrate:
10a cable; 11 barrels; a 12 screw rod; 13, lifting a motor;
14 diaphragm plates; 15 a torsion motor; 16 cross plate heads; a 17-joint;
18 screws; 19 a water outlet hole; a 21 nut; 22 internal threads;
23 external threads; 24 flanges; 25 sealing gaskets; 26 shaft lever;
27 semi-cylinders; a 28 pore water device; 29 pipe boots; a 40-thread adapter;
A 41 water permeable ring; 42 cone points; 50 sampling tube; 51 a faucet;
52 drill pipes; 53 collar; 54 cylinder cover; 55 samples.
Detailed Description
The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and are not intended to be limiting.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
As shown in fig. 1 and 2, the integrated device for cross plate test and sampling of the present invention comprises a cylinder 11, the upper end of which is provided with a joint 17, and can be screwed with a drill rod 52 (see fig. 6) through a coupling 53; a lifting motor 13 is fixedly arranged in the inner cavity of the cylinder 11, and a preferable structure is that a diaphragm 14 is arranged in the cylinder 11, and the lifting motor 13 is fixed above the diaphragm 14. The lifting motor 13 is connected with a screw rod 12, the screw rod 12 passes through a through hole on the diaphragm plate 14, the lower end of the screw rod 12 is connected with a torsion motor 15 through a flange 24, in addition, the screw rod 12 is matched with a nut 21, the nut 21 is fixed in the cylinder 12, and preferably, the nut 21 can be fixed at the upper end or the lower end of the lifting motor 13 through a screw 18; thus, when the lifting motor 13 drives the screw rod 12 to rotate in the forward direction or the reverse direction, the screw rod 12 simultaneously drives the torsion motor 15 to move in the downward direction or the upward direction in a linear manner.
The lower end of the torsion motor 15 is connected to the cross-plate head 16 via a shaft 26 for performing a cross-plate test. A sampling tube 50 is detachably installed in the inner cavity of the lower end of the cylinder 11 for sampling undisturbed soil.
The lifting motor 13 and the torsion motor 15 are uniformly controlled by the control device, so that the invention also preferably comprises the control device, the lifting motor 13 and the torsion motor 15 are connected with the control device, and the lifting motor 13 and the torsion motor 15 preferably adopt stepping motors.
Further, a pore water device 28 can be installed at the lower end of the cross plate head 16, a pore water pressure sensor in the pore water device 28 is also connected with the control device, and the pore water pressure sensor can be used for measuring the pore water pressure of the natural soil body before the cross plate test is carried out. As shown in fig. 5, a preferred structure of the pore water device 28 comprises a threaded adapter 40 and a permeable ring 41, wherein the permeable ring 41 is arranged at the center of the lower end of the cross plate head 16 through the threaded adapter 40, a pore water pressure sensor is positioned in the permeable ring 41, a cone tip 42 is arranged at the lower end of the permeable ring 41, and the cone tip below the cross plate head is firstly contacted with an original soil body, so that the most true pore water pressure flowing into the permeable ring 41 can be ensured; the center of the cross plate head 16 is provided with a through hole, and a signal wire of the pore water pressure sensor can pass through the through hole in the center of the cross plate head 16 and is connected with a control device.
In order to facilitate the measurement of the torsional moment in the cross plate test, a torque sensor may be mounted on the shaft, which is also connected to the control device. The center of the screw rod and the shaft rod is also provided with a through hole, and a cable rope 10 consisting of a pore water pressure sensor, a signal wire of a torque sensor, a control wire connected with the lifting motor 13 and the torsion motor 15 and a power wire can be arranged in the through hole in a penetrating way.
As shown in fig. 1 and 2, the diaphragm 14 divides the inner cavity of the cylinder 11 into an upper chamber and a lower chamber, the lifting motor 13 is located in the upper chamber, the torsion motor 15 is located in the lower chamber, and a drain hole 19 communicating the upper chamber and the lower chamber is provided in the diaphragm 14 for facilitating the hole cleaning operation by using the flushing liquid. And be fixed with the sealing washer 25 that can shutoff apopore 19 at the upper end of torsion motor 15, sealing washer 25 can be fixed on the upper surface of flange 24, and when torsion motor 15 risen along with lead screw 12, with sealing washer 25 with the bottom surface compression contact of diaphragm 14, all through-holes on the diaphragm 14 are all plugged, can prevent the flushing fluid inflow lower chamber.
As shown in fig. 2, in order to facilitate the installation of the internal components, the cylinder 11 is composed of upper, middle and lower three sections, and the adjacent two sections are connected by internal threads 22 and external threads 23. The diaphragm plate 14 is disposed in the middle section near the upper end so as to fixedly mount the lifting motor 13 from the upper end opening. After the lifting motor 13 is installed, the lower end of the screw rod 12 can be exposed from the lower end of the middle section of the cylinder body so as to be connected with the torsion motor 15. The lower section of the cylinder body is formed by splicing two semicircular cylinders 27, as shown in fig. 4, annular grooves are formed in the inner walls of the two semicircular cylinders 27, the sampling cylinder 50 can be just embedded in the annular grooves, and after the two semicircular cylinders 27 are spliced, the sampling cylinder 50 is completely limited in the cylinder body in the radial direction and the axial direction and cannot move or deviate from. The lower end of the lower section of the barrel may also be threadably connected to a cylindrical shoe 29. When the internal components are connected, the upper, middle and lower sections of the cylinder 11 are screwed together through the internal and external threads matched with each other.
In order to further understand the present invention, the method of using the integrated device of the present invention will now be described in terms of working steps with reference to fig. 6. In general terms, the method comprises: drilling and placing the device A, testing the cross plate B, cleaning the hole C and sampling the hole D, thus a complete operation flow is achieved. The concrete explanation is as follows:
A. Drilling and placing device: referring to state a in fig. 6, firstly, drilling holes to a designed depth at an exploration point by using a drilling machine, then connecting the integrated device of the invention to the lower end of a drill rod 52, lengthening the drill rod 52 section by section, and then putting the drill rod into the bottom of the hole; if the specified depth is not reached, the drill hole is flushed with flushing fluid (see step C below), and the hole bottom soil particles are carried out of the drill hole, so that the device is ensured to reach the specified depth.
B. Cross plate test: then, the lifting motor 13 is started to drive the screw rod 12 to rotate, so that the torsion motor 15 and the cross plate head 16 move downwards together until the cross plate head 16 is exposed from the lower end of the cylinder 11 and is inserted into the set depth of the soil body at the bottom of the hole, and the state B in FIG. 6 is referred to; if a pore water pressure sensor is arranged at the lower end of the cross plate head 16, measuring the pore water pressure value of the soil body by using the pore water pressure sensor; then, performing a cross plate test, starting a torsion motor 15 to drive a cross plate head 16 to twist at an initial set speed, and measuring the torsion moment of the cross plate head 16 in an undisturbed soil body by a torque sensor arranged on a shaft lever 26 until a torque peak value or a stable value Cu of the cross plate head in the undisturbed soil body is obtained; then the torsion motor 15 drives the cross plate head 16 to continue to rotate, so that soil around the cross plate head is fully disturbed, and then a torque peak value or a stable value Cu' of the cross plate head in the disturbed soil is measured; and calculating the shear strength of the soil body without draining according to the maximum torque value.
C. Hole cleaning: after the cross plate test is completed, the lifting motor 13 is started to reversely rotate, so that the torsion motor 15 and the cross plate head 16 move upwards together and return to the upper part of the sampling tube, and the state C in FIG. 6 is referred to; the flushing pump is started to press flushing liquid into the drill rod 52 from the tap 51, the flushing liquid is injected into the inner cavity of the cylinder body along the drill rod until reaching the bottom of the hole, and flows out from the space between the outside of the cylinder body and the hole wall and flows back to a circulating pool (not shown). Soil particles at the bottom of the hole gradually flow to the outside of the hole along with the flushing liquid, and the soil body of the disturbance zone formed after the cross plate test is washed away along with repeated lifting of the drill rod 52 and impact of the flushing liquid until the bottom of the hole is positioned on the original soil body.
D. Sampling: the drilling machine adopts a pressing method or a hammering method to penetrate the sampling tube at the lower end of the cylinder into the soil, so as to finish undisturbed soil sampling. At this time, the lifting motor 13 may be started to drive the torsion motor 15 and the cross plate head 16 to move upwards continuously, so that the sealing gasket 25 above the torsion motor 15 is in close contact with the bottom surface of the diaphragm plate 14, referring to state D in fig. 6, the flushing liquid is prevented from flowing into the lower chamber of the cylinder, and meanwhile, the lower chamber above the soil sample forms a closed space, if the soil sample slides down due to self weight, vacuum is formed at the upper part, thereby preventing the soil sample from sliding down further, and ensuring that the soil sample does not fall off. Finally the drill lifts the drill pipe 52 until the integrated device of the present invention lifts to the surface. Referring to fig. 4, the lower section and the middle section of the cylinder are separated, the pipe shoe 29 is screwed down, the two semicircular cylinders 27 are separated, the inner sampling cylinder 50 (the inside of the cylinder is the undisturbed soil sample 55) is taken out, the cylinder covers 54 are added at the two ends of the sampling cylinder 50, seals are stuck at the gaps between the sampling cylinder 50 and the cylinder covers 54, and after waxing, the mixture is stored and finally sent to a geotechnical laboratory.
After the test steps are completed, the device is reassembled, the hole can be drilled to the next depth, and the steps of device placement in the step A, cross plate test in the step B, hole cleaning in the step C and sampling in the step D are repeatedly executed until the whole drilling reaches the design depth.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present invention, and these modifications and substitutions should also be considered as being within the scope of the present invention.
Claims (4)
1. An integrated device for cross plate testing and sampling, comprising the following components:
the upper end of the cylinder body can be connected with the drill rod;
The lifting motor is fixedly arranged in the cylinder;
the screw rod is connected with the lifting motor and matched with a nut fixed in the cylinder body;
the torsion motor is connected to the lower end of the screw rod;
the cross plate head is connected with the torsion motor through a shaft rod, and a torque sensor is arranged on the shaft rod;
The sampling tube is detachably arranged at the lower end of the cylinder body;
the lifting motor, the torsion motor and the torque sensor are all connected with the control device;
the centers of the screw rod, the shaft rod and the cross plate head are respectively provided with a through hole for a power cable to pass through;
The inside of barrel has the diaphragm, elevator motor fixes on the diaphragm, is equipped with the through-hole that supplies the lead screw to pass on the diaphragm, the diaphragm divide into cavity and lower cavity with the inner chamber of barrel, still be equipped with the apopore of cavity and lower cavity on the diaphragm on the intercommunication, torsion motor's upper end is fixed with can shutoff the sealed pad of apopore.
2. The integrated device of claim 1, wherein a pore water pressure sensor is mounted at the lower end of the cross head, the pore water pressure sensor also being connected to a control device.
3. A method of using the integrated device of claim 1, comprising the steps of:
A. Firstly, drilling holes to the designed depth at the exploration point by using a drilling machine, then connecting the integrated device of the invention to the lower end of a drill rod, and placing the integrated device into the bottom of the holes;
B. Then, starting the lifting motor to drive the screw rod to rotate, so that the torsion motor and the cross plate head move downwards together until the cross plate head is inserted into a set depth; then, performing a cross plate test, starting a torsion motor to drive a cross plate head to rotate, and measuring the torsion moment of the cross plate head in an undisturbed soil body by a torque sensor arranged on a shaft lever; measuring the torsion moment of the cross plate head in the disturbance soil;
C. After the cross plate test is completed, starting the lifting motor to reversely rotate, so that the torsion motor and the cross plate head move upwards together and return to the upper part of the sampling tube; injecting flushing fluid into the inner cavity of the cylinder body to the bottom of the hole along the drill rod, and flowing out from the position between the outside of the cylinder body and the hole wall, wherein soil particles at the bottom of the hole gradually flow to the outside of the hole along with the flushing fluid, and the flushing fluid repeatedly lifts and impacts along with the drill rod, so that soil bodies in a disturbance area formed after the cross plate test are washed away until the bottom of the hole is positioned on original soil bodies;
D. And the drilling machine adopts a pressing-in method or a hammering method to penetrate the sampling tube at the lower end of the cylinder body into the soil to finish undisturbed soil sampling, and finally, the drilling machine lifts the drill rod until the integrated device is lifted to the ground, the sampling tube is taken down, and the packaging treatment is carried out.
4. The method of claim 3, wherein a pore water pressure sensor is further installed at the lower end of the cross-plate head, and in step B, after the cross-plate head is inserted to a set depth, pore water pressure is measured before the cross-plate test is performed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710938826.6A CN107560884B (en) | 2017-09-30 | 2017-09-30 | Integrated device for cross plate test and sampling and use method |
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| CN201710938826.6A CN107560884B (en) | 2017-09-30 | 2017-09-30 | Integrated device for cross plate test and sampling and use method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109870370A (en) * | 2019-03-05 | 2019-06-11 | 三峡大学 | Sample devices are cut in a kind of torsion of multifunctional in-situ Rock And Soil |
| CN110273412A (en) * | 2019-06-24 | 2019-09-24 | 中交第三航务工程勘察设计院有限公司 | A kind of deep hole static sounding device |
| CN111238868B (en) * | 2020-03-11 | 2022-07-01 | 山东省环科院环境科技有限公司 | Intelligent soil sampler |
| AU2021290650A1 (en) * | 2020-06-18 | 2023-01-19 | Yvo Keulemans | A measuring device and method of use thereof |
| CN111829898B (en) * | 2020-07-09 | 2021-11-09 | 广州海洋地质调查局 | Cross plate shearing test device in sampling tube |
| CN114486673B (en) * | 2022-01-04 | 2023-01-17 | 中交第四航务工程局有限公司 | In-situ pore pressure testing device and method for field vibration liquefaction test |
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| CN207318138U (en) * | 2017-09-30 | 2018-05-04 | 中交第三航务工程勘察设计院有限公司 | For field vane shear test and the integrated apparatus of sampling |
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| KR20110054573A (en) * | 2009-11-18 | 2011-05-25 | 한국건설기술연구원 | Soil testing device for cone penetration test and vane shear test |
| CN202216879U (en) * | 2011-08-25 | 2012-05-09 | 华侨大学 | Cross plate shearing instrument |
| CN202256072U (en) * | 2011-09-14 | 2012-05-30 | 中国海洋大学 | Portable vane-shear apparatus |
| TW201621293A (en) * | 2014-12-02 | 2016-06-16 | Univ Chienkuo Technology | Vane shear testing equipment for seabed measurement |
| CN105973720B (en) * | 2016-05-04 | 2019-05-14 | 河海大学 | A kind of vane-shear device |
| CN106092770A (en) * | 2016-06-07 | 2016-11-09 | 中国海洋石油总公司 | A kind of box Shearing strength test method |
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| CN207318138U (en) * | 2017-09-30 | 2018-05-04 | 中交第三航务工程勘察设计院有限公司 | For field vane shear test and the integrated apparatus of sampling |
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