CN115901491B - Two-in-one drilling shear test system and method thereof - Google Patents
Two-in-one drilling shear test system and method thereofInfo
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- CN115901491B CN115901491B CN202211531459.5A CN202211531459A CN115901491B CN 115901491 B CN115901491 B CN 115901491B CN 202211531459 A CN202211531459 A CN 202211531459A CN 115901491 B CN115901491 B CN 115901491B
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Abstract
本发明涉及一种二合一的钻孔剪切试验系统及其方法，该方案包括操作平台；钻机系统，包括钻机、第一升降机构以及控制单元，钻机能够在第一升降机构驱动下下降与套管驱动连接并驱动套管转动；套管，顶部与钻机可拆卸连接，顶部与传动端管可拆卸连接；钻探一体钻具，包括活瓣钻头、外套、剪切探头及传感器；传动端管，底部与钻探一体钻具的活瓣钻头顶部可拆卸连接；打捞机构；法向应力加载机构；电机驱动模块；数据采集记录仪。本发明结构简单，节省试验步骤，减少扰动，预防塌孔风险，提高了测试的原位土样的抗剪强度参数的准确性，为基坑和边坡的支护提供依据强。
This invention relates to a two-in-one borehole shear testing system and method. The system includes an operating platform; a drilling rig system comprising a drilling rig, a first lifting mechanism, and a control unit, wherein the drilling rig, driven by the first lifting mechanism, descends and connects to the casing drive, driving the casing to rotate; a casing, detachably connected at the top to the drilling rig and at the top to a transmission end pipe; an integrated drilling tool, comprising a flap drill bit, an outer casing, a shear probe, and a sensor; a transmission end pipe, detachably connected at the bottom to the top of the flap drill bit of the integrated drilling tool; a retrieval mechanism; a normal stress loading mechanism; a motor drive module; and a data acquisition and recording device. This invention features a simple structure, saves testing steps, reduces disturbance, prevents borehole collapse risks, and improves the accuracy of the shear strength parameters of in-situ soil samples, providing a strong basis for the support of foundation pits and slopes.
Description
Technical Field
The invention relates to the field of geotechnical engineering in-situ test, in particular to a two-in-one drilling shear test system and a method thereof.
Background
The cohesion and internal friction angle are important shear strength indexes of soil mass, and are important parameters for calculating soil pressure and foundation bearing capacity, analyzing stability of embankment, side slope, foundation pit and tunnel and developing supporting structure design of the embankment, side slope, foundation pit and tunnel. The cohesion and internal friction angle are currently measured by a method of performing an indoor test by drilling a soil sample, and the adopted indoor test methods are a direct shear test and a triaxial compression test. The method for measuring the soil shear strength of the sandy soil has the advantages that the disturbance of the soil body is large, the soil sample is unloaded through stress release and the soil sample is reloaded through an indoor test, the shear strength index of the soil is inevitably different from the in-situ shear strength index of the soil, the test result has large discreteness, and the sandy soil original sample is difficult to obtain by the indoor test method, so that the sandy soil shear strength parameter cannot be measured.
The conventional in-situ drilling shearing test needs to drill a drilling hole by using a drilling machine, then remove the drilling machine, and then test by using an in-situ drilling shearing instrument, so that the operation is troublesome, the efficiency is low, the hole collapse problem is easy to occur, and once the shearing head is clamped in the hole, the loss is huge.
Another method is to test the shear strength parameters of the soil in situ. The method mainly comprises the on-site direct shear test and the cross plate shear test. The on-site direct shear test needs to be carried out in a test hole, pilot hole, a exploratory groove or a large-caliber drilling hole, and has the advantages of small disturbance to a soil sample, accurate and reliable test result, difficult test to a deep soil body and great consumption of manpower and material resources. The cross plate shearing test has the advantages of simple equipment and convenient operation, and has the defect of being only suitable for measuring the non-drainage shearing strength of saturated cohesive soil with the internal friction angle basically equal to zero.
In addition, when all kinds of in-situ in-hole shearing equipment are used for in-situ testing of deeper stratum, drilling machine systems are required to be matched with holes, and a probe rod and a drill are required to be frequently detached and lifted, so that the integrity and stability of the wall of a drilled hole are greatly influenced, the accuracy of the subsequent in-hole shearing test result is further influenced, the wall of the drilled hole is easy to collapse, in-situ in-hole shearing probes cannot be buried in the holes and are not taken out, and great risks and potential safety hazards are brought to deep in-situ in-hole shearing testing.
Accordingly, in view of the above-mentioned shortcomings of the prior art, it is an object of the present invention to provide a drilling and shear test system that can achieve drilling, wall protection and shear test integration. And the drilling and the testing are integrated, so that the risk of hole collapse is reduced, the operation is simplified, and the test efficiency is improved.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a two-in-one drilling shear test system and a method thereof.
In order to achieve the aim of the invention, the invention adopts the following technical scheme that the two-in-one drilling shear test system comprises:
the operation platform is used for being fixed at a position to be detected and for mounting and fixing the drilling machine system, the data acquisition recorder, the normal stress loading mechanism and the motor driving module;
The drilling machine system comprises a drilling machine, a first lifting mechanism for driving the drilling machine to move up and down and a control unit for controlling the drilling machine, wherein the drilling machine can be driven to descend by the first lifting mechanism, is connected with a sleeve in a driving way and drives the sleeve to rotate;
the top of the sleeve is detachably connected with the drilling machine, and the top of the sleeve is detachably connected with the transmission end pipe;
the drilling integrated drilling tool comprises a valve drill bit, an outer sleeve arranged outside the valve drill bit, a shearing probe arranged in the valve drill bit and a sensor arranged on the shearing probe;
the bottom of the transmission end pipe is detachably connected with the top of the valve drill bit of the drilling integrated drilling tool so as to drive the drilling integrated drilling tool to rotate;
The fishing mechanism is used for penetrating through the sleeve to be connected with a fishing device of the transmission end pipe or the drilling integrated drilling tool and a stay wire, and the stay wire is connected with the motor driving module;
The normal stress loading mechanism comprises an oil supply mechanism and a hydraulic hose connected with the oil supply mechanism and the shearing probe, and the oil supply mechanism is provided with a pressure gauge and a hydraulic sensor;
the motor driving module is used for driving the stay wire to lift the salvaging device upwards from the sleeve, and a tension sensor is arranged at the joint of the stay wire and the motor driving module;
The data acquisition recorder is in communication connection with all the sensors and comprises a normal stress meter, a tangential displacement meter, a normal displacement meter and a pore water pressure meter, and is used for recording normal stress, shearing force, normal deformation force, shearing deformation force and pore water pressure and time readings.
Further, the sleeve is of a sectional structure, each section is detachably connected, the lowest section is used as the first section, and bottoms of the other sections except the first section are smooth.
Further, spline teeth are formed on the outer side of the middle of the outer sleeve and meshed with the spline sleeve of the transmission end pipe.
Further, zhang Lianzhou is arranged in the outer sleeve, the converging shaft is divided into an inner layer and an outer layer, an oil passing channel is formed in the hollow mode of the inner layer, a first sensor wire connector is arranged at the top of the inner layer, a side lug is arranged on the inner layer, the side lug penetrates through the outer layer to be fixedly connected with the outer sleeve, a hollow structure matched with the side lug is arranged on the outer layer, a salvaging spearhea is arranged at the top of the outer layer, the outer layer can move up and down along the outer sleeve under the driving of a motor driving module through the connection and the cooperation of the salvaging spearhea and the salvaging device, a valve drill bit is connected with the outer layer of Zhang Lianzhou, and a sleeve positioned at the outer side of the valve drill bit is arranged at the bottom of the outer layer, so that the valve drill bit can converge inwards and push outwards along with the up-down movement of the outer layer.
Further, the shearing probe comprises an oil cylinder, a first shearing plate and a second shearing plate which are vertically and parallelly arranged, a gap for installing an oil supply cylinder is arranged between the first shearing plate and the second shearing plate, two pistons of the oil cylinder are mutually nested and reserved with gaps, and the oil cylinder is communicated with the bottom of the inner layer.
Further, pore water pressure test probes and stress probes are arranged on the first shear plate and the second shear plate, and a normal displacement sensor is further arranged between the first shear plate and the second shear plate, and the pore water pressure test probes, the stress probes and the normal displacement sensor are all in communication connection with the data acquisition recorder.
Further, the fishing device comprises a shell and an inner shaft arranged in the shell, wherein the top end of the shell can be connected with a stay wire, the bottom end of the shell can be connected with a fishing spearhead, the top end of the inner shaft is connected with a hydraulic hose through a scribing line, a data cable interface is arranged below the scribing line, and the bottom end of the inner shaft is connected with the top end of the inner layer.
Further, the driving end pipe comprises an outer pipe, a clamping piece arranged on the outer pipe, a spring arranged between the outer pipe and the clamping piece and a sliding spear arranged at the top of the outer pipe, and the top end of the sliding spear can be connected with the salvaging device.
Further, the motor driving module comprises a motor case, a second lifting mechanism arranged on the side face of the motor case, a fixed pulley block arranged on the second lifting mechanism, a stepping motor arranged in the motor case, a transverse sliding rail arranged at the bottom of the motor case and a winch connected with the stepping motor, wherein the transverse sliding rail is detachably arranged on an operation platform, the motor case can move and be fixed back and forth along the length direction of the transverse sliding rail, and the fixed pulley block can move and be fixed up and down along the second lifting mechanism.
A testing method of a two-in-one drilling shear test system comprises the following steps:
S1, installing a fixed operation platform at a preset detection position, installing a drilling machine system, a data acquisition recorder, a normal stress loading mechanism and a motor driving module on the operation platform, and simultaneously moving the motor driving module to the outermost side;
S2, connecting a transmission end pipe to the bottom end of a first section of sleeve of the sleeve, and connecting the sleeve with a drilling machine system in a driving way, so that the transmission end pipe at the bottom end of the sleeve is connected and matched with a drilling integrated drilling tool, and meanwhile, the bottom end of the sleeve is locked and fastened, the outer layer of the converging shaft is not moved upwards, so that the valve drill bit is kept closed;
S3, the drilling machine system drives the sleeve and a transmission end pipe positioned at the bottom of the sleeve to drill into the soft soil stratum, and the transmission end pipe drives a drilling integrated drilling tool to drill;
s4, after each time the soft soil stratum is drilled to a set depth or a preset in-situ hole shear test depth is drilled, disconnecting the drilling machine from the upper end of the sleeve;
S5, lifting the drilling machine to the highest point along the first lifting mechanism, moving the motor driving module to the innermost side, connecting the stay wire to the winch, bypassing the fixed pulley block, lifting the fixed pulley block to a position higher than the top end of the sleeve along the second lifting mechanism after the other end of the fixed pulley block is connected with the fishing device, and taking out the transmission end pipe by using the fishing device;
S6, connecting one end of a hydraulic hose to the upper end of a salvaging device, connecting a data acquisition recorder with an interface at the upper end of the salvaging device through a data cable, fixing the salvaging device on a salvaging spear at the outer layer of Zhang Lianzhou, pulling the salvaging device through a pull wire to enable the salvaging device to be connected with the salvaging spear, lifting the salvaging device through a winch to enable a valve drill bit of a drilling integrated drilling tool to be in an open state, and exposing a shearing probe;
s7, starting an oil supply mechanism, applying an initial normal stress to enable a shearing plate of a shearing probe to be in contact with the wall of a drilling hole, then unloading the normal stress, and initializing initial normal stress, shearing force, normal deformation, shearing deformation, pore water pressure and time reading of a data acquisition recorder to be 0;
S8, applying a first-stage normal stress through a normal stress control unit in the normal stress loading mechanism, and observing soil consolidation conditions through a pore water pressure curve after soil is consolidated for a certain time;
S9, driving a winch, lifting the salvaging device and the drilling integrated drilling tool at a constant speed, slowly increasing the reading of the tension sensor, stopping pulling up until the reading of the tension sensor suddenly decreases, and at the moment, shearing and damaging soil, and recording the stress, normal deformation, pore water pressure image and maximum tension value before shearing and damaging the soil;
s10, closing a winch, removing normal stress in a double-acting pressure oil cylinder of a shearing probe through a normal stress control unit in a normal stress loading mechanism, closing the shearing probe, removing a salvaging device, and re-lowering a transmission end pipe from the upper end of the sleeve, wherein the transmission end pipe is re-fixed at the bottom end of the sleeve due to gravity;
s11, connecting a drilling machine, continuing drilling, repeating S5-S9, carrying out the normal stress test of the next stage, and carrying out multi-stage different normal stress in-situ hole shearing tests on each test point;
And S12, removing the drilling integrated drilling tool from the drilling hole, repeating S1-S11, and carrying out an in-situ hole shearing test of the next point position.
The working principle and the beneficial effects are that 1, compared with the prior art, the application can realize the integration of drilling, wall protection and shearing test, the valve drill bit drills to the appointed depth, the shearing test can be carried out by exposing the shearing head immediately, after the shearing test is completed, the shearing head is retracted, the valve drill bit can drill further to the deep part, and the repeated circulation is carried out, thereby greatly improving the test efficiency. And holes are not easy to collapse, so that the stability of a test result is improved. The probe is hidden in the valve drill bit and is not easy to damage. The sleeve plays a role of protecting the wall all the time, prevents the drill hole from collapsing to clamp the probe, and is especially suitable for soft soil and other soil which is easy to collapse;
2. Compared with the prior art, the method can rapidly measure the relation curve of shear stress and shear displacement under normal stress conditions of each level, further obtain soil shear strength parameters corresponding to proportional strength, yield strength, peak strength and residual strength, enrich test results and facilitate selection of corresponding shear strength parameters according to different working conditions in engineering application processes;
3. Compared with the prior art, the method avoids the risk of buried drilling in the deep in-situ hole shearing test, is particularly suitable for the deep in-situ hole shearing test, has good effect of testing hole wall integrity and stability, and has accurate and reliable test data.
Drawings
Fig. 1 is a schematic view showing a state when a drilling operation is performed by using the present invention.
Fig. 2 is a schematic diagram of a state of salvaging a driving end pipe by using the present invention.
FIG. 3 is a schematic view of the invention in a state in which in-situ in-hole shear test preparation is performed.
FIG. 4 is a schematic view of the state of the invention when in-situ in-hole shear testing is performed.
Fig. 5 is a cross-sectional view of a drilling integrated tool of the present invention.
FIG. 6 is a cross-sectional view of the fishing apparatus of the present invention.
Fig. 7 is a cross-sectional view of a driving end of the present invention.
FIG. 8 is a schematic view of a converging shaft inner layer tip first sensor wire interface of the present invention.
Fig. 9 is a schematic view of the spline teeth of the drilling integrated tool of the present invention.
FIG. 10 is a schematic view of a shear probe of the present invention;
fig. 11 is a flow chart of the method of the present invention.
In the figure, 1, a drilling machine system; 1-1, a drilling machine; 1-2, a first lifting mechanism; 1-3, a control unit, 2, a casing, 3, a drilling integrated drilling tool, 3-1, a fishing spearhead, 3-2, a casing, 3-3, a spline tooth, 3-4, a valve drill, 3-5, zhang Lianzhou, 3-5-1, an outer layer, 3-5-2, an inner layer, 3-5-3, a casing, 3-5-4, a first sensor wire interface, 3-5-5, a side ear, 3-6, a shearing probe, 3-6-1, a first shear plate, 3-6-2, a second shear plate, 3-6-3, an oil cylinder, 3-6-4, a normal displacement sensor, 3-6-5, a pore water pressure probe, 3-6-6, a stress probe, 4, an operating platform, 5, a data acquisition recorder, 6, a mechanism, 6-1, a fishing device, a fishing tool, 6-1-1, a casing, 6-1-2, 6-1-3, a data cable interface, 6-1-4, a second sensor wire interface, 7-1, a pressure transducer, 7-8, a hydraulic pressure transducer, a valve, a hydraulic actuator, a hydraulic valve and a hydraulic valve, a hydraulic valve and a hydraulic valve, and a hydraulic valve and hydraulic and 35, the device comprises a spline housing, a motor driving module, 9-1, a motor box, 9-2, a second lifting mechanism, 9-3, a fixed pulley block, 9-4, a stepping motor, 9-5, a transverse sliding rail, 9-6 and a winch.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which are derived by a person skilled in the art based on the embodiments of the invention, fall within the scope of protection of the invention.
It will be appreciated by those skilled in the art that in the present disclosure, the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc. refer to an orientation or positional relationship based on that shown in the drawings, which is merely for convenience of description and to simplify the description, and do not refer to or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus the above terms should not be construed as limiting the present invention.
Example 1
As shown in fig. 1 to 11, the two-in-one borehole shear test system comprises:
Specifically, the operation platform 4 is used for being fixed at a position to be detected and for being fixedly installed by the drilling machine system 1, the data acquisition recorder 5, the normal stress loading mechanism 7 and the motor driving module 9;
in this embodiment, the operating platform 4 is anchored to the ground by rivets.
Specifically, the drilling machine system 1 comprises a drilling machine 1-1, a first lifting mechanism 1-2 for driving the drilling machine 1-1 to move up and down, and a control unit 1-3 for controlling the drilling machine 1-1, wherein the drilling machine 1-1 can be driven to descend by the first lifting mechanism 1-2, is in driving connection with a casing pipe 2 and drives the casing pipe 2 to rotate;
in the embodiment, the control unit 1-3 is a conventional technical means for rotating speed and steering of the drilling machine 1-1. The drilling machine system 1 is fixed with the operation platform 4 through a buckle and can be quickly disassembled and assembled.
Specifically, the top of the sleeve 2 is detachably connected with the drilling machine 1-1, and the top of the sleeve is detachably connected with the transmission end pipe 8;
In this embodiment, the sleeve 2 is of a sectional structure, and each section is detachably connected, and the lowest section is taken as the first section. Preferably, the sleeve 2 is threaded up and down, the bottom end of the first sleeve 2 can be fixed with a transmission end pipe 8, the top end can be connected with the next sleeve 2, and the bottom ends of the other sleeves 2 except the first sleeve 2 are smooth.
Specifically, the drilling integrated drilling tool 3 comprises a valve drill bit 3-4, an outer sleeve 3-2 arranged outside the valve drill bit 3-4, a shearing probe 3-6 arranged in the valve drill bit 3-4 and a sensor arranged on the shearing probe 3-6;
In the embodiment, spline teeth 3-3 are formed on the outer side of the middle part of the outer sleeve 3-2, and the spline teeth 3-3 are meshed with a spline sleeve 8-5 of the transmission end pipe 8;
Wherein Zhang Lianzhou 3-5 is arranged in the outer sleeve 3-2, the astringing shaft 3-5 is divided into an inner layer and an outer layer, the inner layer 3-5-2 is hollow and provided with an oil passing channel, the top of the inner layer 3-5-2 is provided with a concentric first sensor wire interface 3-5-4, the inner layer 3-5-2 is provided with a side lug 3-5-5, the side lug 3-5-5 passes through the outer layer 3-5-1 to be fixedly connected with the outer sleeve 3-2, the outer layer 3-5-1 is provided with a hollowed-out structure matched with the side lug 3-5-5, the top of the outer layer 3-5-1 is provided with a salvaging spearhead 3-1, and the outer layer 3-5-1 can move up and down along the outer sleeve 3-2 under the driving of the motor driving module 9 through the connection and the cooperation of the salvaging spearhead 3-1 and the salvaging device 6-1;
wherein, the valve drill bit 3-4 is connected with the outer layer 3-5-1 of Zhang Lianzhou, and the bottom of the outer layer 3-5-1 is provided with a sleeve 3-5-3 positioned outside the valve drill bit 3-4, so that the valve drill bit 3-4 can be converged inwards and pushed outwards along with the up-down movement of the outer layer 3-5-1.
The shearing probe 3-6 comprises an oil cylinder 3-6-3, a first shearing plate 3-6-1 and a second shearing plate 3-6-2 which are vertically and parallelly arranged, a gap for installing the oil cylinder 3-6-3 is arranged between the first shearing plate 3-6-1 and the second shearing plate 3-6-2, two pistons of the oil cylinder 3-6-3 are mutually nested and reserved with gaps, and the oil cylinder 3-6-3 is communicated with the bottom of the inner layer 3-5-2.
Wherein, the first shear plate 3-6-1 and the second shear plate 3-6-2 are respectively provided with a pore water pressure test probe and a stress probe 3-6-6, and two normal displacement sensors 3-6-4 are also arranged between the first shear plate 3-6-1 and the second shear plate 3-6-2, and the normal displacement sensors 3-6-4 are respectively connected with the shear plates at the corresponding sides. The pore water pressure test probe, the stress probe 3-6-6 and the normal displacement sensor 3-6-4 are all in communication connection with the data acquisition recorder 5.
Wherein, each shear plate is a steel plate with a serrated transverse groove at the outer side.
When the shearing probe 3-6 works, the outer side face of the first shearing plate 3-6-1 and the outer side face of the second shearing plate 3-6-2 are both attached to the inner side face of a drilled hole, the normal displacement sensor 3-6-4, the oil cylinder 3-6-3 and the piston are located between the inner side face of the first shearing plate 3-6-1 and the inner side face of the second shearing plate 3-6-2, the fixed end of the oil cylinder 3-6-3 is connected with the lower end of the inner layer 3-5-2, two pistons of the oil cylinder 3-6-3 are mutually nested and are provided with gaps, one end of each piston is connected with the inner side face of the first shearing plate 3-6-1 and the inner side face of the second shearing plate 3-6-2, and a baffle is arranged at the end of each piston rod. Thus, the oil cylinder 3-6-3 stretches to drive the shearing probe 3-6 to stretch.
Specifically, the bottom of the transmission end pipe 8 is detachably connected with the top of the valve drill bit 3-4 of the drilling integrated drilling tool 3 so as to drive the drilling integrated drilling tool 3 to rotate;
In the present embodiment, the driving end pipe 8 includes an outer pipe 8-1, a card 8-3 provided on the outer pipe 8-1, a spring 8-4 provided between the outer pipe 8-1 and the card 8-3, and a sliding lance 8-2 provided on the top of the outer pipe 8-1, the top end of the sliding lance 8-2 being connectable with the salvaging device 6-1.
Specifically, a fishing mechanism 6 is used for connecting a fishing device 6-1 of a transmission end pipe 8 or a drilling integrated drilling tool 3 and a pull wire 6-2 through the casing pipe 2, and the pull wire 6-2 is connected with a motor driving module 9;
In this embodiment, the fishing device 6-1 includes a housing 6-1-1 and an inner shaft 6-1-2 disposed in the housing 6-1-1, wherein the top end of the housing 6-1-1 can be connected with a pull wire 6-2, the bottom end can be connected with a fishing spearhead 3-1, the top end of the inner shaft 6-1-2 is connected with a hydraulic hose 7-2 through a score line, a data cable interface 6-1-3 is disposed below the score line, and the bottom end of the inner shaft 6-1-2 is connected with the top end of the inner layer 3-5-2. When the fishing device 6-1 is connected to the fishing spearhead 3-1, the second sensor wire connector 6-1-4 is connected to the first sensor wire connector 3-5-4 in a concentric circle.
Specifically, the normal stress loading mechanism 7 comprises an oil supply mechanism 7-1 and a hydraulic hose 7-2 for connecting the oil supply mechanism 7-1 and the shearing probe 3-6, wherein the oil supply mechanism 7-1 is provided with a pressure gauge 7-3 and a hydraulic sensor (a sensor for displaying oil supply pressure);
In the embodiment, the upper end of the hydraulic hose 7-2 is connected with the oil supply mechanism 7-1, and the lower end is connected with the oil cylinder 3-6-3 in the shearing probe 3-6.
Specifically, the motor driving module 9 is used for driving the pull wire 6-2 to lift the fishing device 6-1 upwards from the sleeve 2, and a tension sensor is arranged at the joint of the pull wire 6-2 and the motor driving module 9, and the tension sensor is preferably a tension meter;
In this embodiment, the motor driving module 9 includes a motor case 9-1, a second lifting mechanism 9-2 disposed on a side surface of the motor case 9-1, a fixed pulley block 9-3 disposed on the second lifting mechanism 9-2, a stepping motor 9-4 disposed in the motor case 9-1, a transverse sliding rail 9-5 disposed at a bottom of the motor case 9-1, and a winch 9-6 connected to the stepping motor 9-4, wherein the transverse sliding rail 9-5 is detachably disposed on the operation platform 4, the motor case 9-1 can move and fix along a length direction of the transverse sliding rail 9-5, and the fixed pulley block 9-3 can move and fix up and down along the second lifting mechanism 9-2.
Preferably, the transverse slide rail 9-5 is fastened to the operating platform 4 by means of a snap-fit, quick-release.
Wherein, be provided with forward rotation control button, reversal control button, rotational speed control knob and stop button on the motor drive module 9, forward rotation control button, reversal control button and stop button's output all is connected with the input of the controller of motor drive module 9.
Specifically, the data acquisition recorder 5 is in communication connection with all sensors, and the data acquisition recorder 5 comprises a normal stress meter, a tangential displacement meter, a normal displacement meter and a pore water pressure meter, and is used for recording normal stress, shearing force, normal deformation force, shearing deformation force and pore water pressure and time reading, which are all in the prior art and can be purchased from the market.
Example 2
Referring to fig. 11, based on example 1, the testing method of the two-in-one borehole shear test system comprises the following steps:
S1, installing a fixed operation platform 4 at a preset detection position, installing a drilling machine system 1, a data acquisition recorder 5, a normal stress loading mechanism 7 and a motor driving module 9 on the operation platform 4, and simultaneously moving the motor driving module to the outermost side along a transverse sliding rail 9-5;
S2, connecting a transmission end pipe 8 to the bottom end of a first section of casing 2 of the casing 2, and connecting the casing 2 with a drilling machine system 1 in a driving way, so that the transmission end pipe 8 at the bottom end of the casing 2 is connected and matched with the drilling integrated drilling machine 3, and meanwhile, the outer layer 3-5-1 of the casing 2 bottom end locking Zhang Lianzhou-5 is not moved upwards, so that the valve drill bit 3-4 is kept closed;
s3, the drilling machine system 1 drives the sleeve 2 and the transmission end pipe 8 positioned at the bottom of the sleeve 2 to drill into a soft soil stratum, and the transmission end pipe 8 drives the drilling integrated drilling tool 3 to drill;
s4, after each time the soft soil stratum is drilled to a set depth (2 m) or a preset in-situ hole shear test depth is drilled, disconnecting the drilling machine 1-1 from the upper end of the sleeve 2;
S5, lifting the drilling machine 1-1 to the highest point along the first lifting mechanism 1-2, moving the motor driving module 9 to the innermost side, connecting the pull wire 6-2 to the winch 9-6, bypassing the fixed pulley block 9-3, connecting the other end of the pull wire with the fishing device 6-1, lifting the fixed pulley block 9-3 to a position higher than the top end of the sleeve pipe 2 along the second lifting mechanism 9-2, and taking out the transmission end pipe 8 by using the fishing device 6-1;
S6, connecting one end of a hydraulic hose 7-2 to the upper end of a salvaging device 6-1, connecting a data acquisition recorder 5 with an interface at the upper end of the salvaging device 6-1 through a data cable, fixing the salvaging device 6-1 on a salvaging spearhead 3-1 of a Zhang Lianzhou outer layer 3-5-1, pulling the salvaging device 6-1 through a pull wire 6-2, enabling the salvaging device 6-1 to be connected with the salvaging spearhead 3-1, lifting the salvaging device 6-1 through a winch 9-6, enabling a flap drill bit 3-4 of a drilling integrated drilling tool 3 to be in an open state, and exposing a shearing probe 3-6;
S7, starting an oil supply mechanism 7-1, applying an initial normal stress (extremely small force) to enable a shearing plate of a shearing probe 3-6 to be in contact with the wall of a drilling hole, then unloading the normal stress, and initializing initial normal stress, shearing force, normal deformation, shearing deformation, pore water pressure and time reading of a data acquisition recorder 5 to 0;
s8, applying a first-stage normal stress through a normal stress control unit 1-3 in a normal stress loading mechanism 7, and observing soil consolidation conditions through a pore water pressure curve after soil is consolidated for a certain time;
S9, driving a winch 9-6, lifting a salvaging device 6-1 and a drilling integrated drilling tool 3 at a constant speed (0.8 mm/min), slowly increasing the reading of a tension sensor until the reading of the tension sensor suddenly decreases, stopping pulling up, at the moment, shearing and breaking soil, and recording the stress, normal deformation, pore water pressure image and maximum tension value before shearing and breaking the soil;
S10, closing a winch 9-6, removing normal stress in a double-acting pressure cylinder 3-6-3 of a shearing probe 3-6 through a normal stress control unit 1-3 in a normal stress loading mechanism 7, closing the shearing probe 3-6, removing a salvaging device 6-1, and re-setting a transmission end pipe 8 from the upper end of the sleeve 2, wherein the transmission end pipe 8 is re-fixed at the bottom end of the sleeve 2 due to gravity;
S11, connecting the drilling machine 1-1, continuing drilling, repeating S5-S9 to perform the normal stress test of the next stage, and performing multi-stage (4-5 stages) normal stress in-situ hole shear tests on each test point;
and S12, removing the drilling integrated drilling tool 3 from the drilling hole, repeating S1-S11, and carrying out an in-situ hole shearing test of the next point position.
The invention is not described in detail in the prior art, and therefore, the invention is not described in detail.
It will be understood that the terms "a" and "an" should be interpreted as referring to "at least one" or "one or more," i.e., in one embodiment, the number of elements may be one, while in another embodiment, the number of elements may be plural, and the term "a" should not be interpreted as limiting the number.
Although the drill system 1, drill 1-1, first lift mechanism 1-2, control unit 1-3, casing 2, drilling integrated tool 3, fishing spearhead 3-1, casing 3-2, spline teeth 3-3, flapper bit 3-4, zhang Lianzhou-5, outer layer 3-5-1, inner layer 3-5-2, sleeve 3-5-3, first sensor wire interface 3-5-4, side ear 3-5-5, shear probe 3-6, first shear plate 3-6-1, second shear plate 3-6-2, ram 3-6-3, normal displacement sensor 3-6-4, pore water pressure probe 3-6-5, stress probe 3-6-6' the operation platform 4, the data acquisition recorder 5, the salvaging mechanism 6, the salvaging device 6-1, the shell 6-1-1, the inner shaft 6-1-2, the data cable interface 6-1-3, the second sensor wire interface 6-1-4, the pull wire 6-2, the normal stress loading mechanism 7, the oil supply mechanism 7-1, the oil tank 7-1-1, the oil pump 7-1-2, the hydraulic hose 7-2, the pressure gauge 7-3, the transmission end pipe 8, the outer pipe 8-1, the sliding spear 8-2, the card 8-3, the spring 8-4, the spline housing 8-5, the motor driving module 9, the motor box 9-1, the second lifting mechanism 9-2, the fixed pulley block 9-3, stepper motor 9-4, transverse slide 9-5, winch 9-6, etc., but the possibility of using other terms is not precluded. These terms are only used to more conveniently describe and explain the nature of the invention and should be construed in a manner consistent with their spirit and scope.
The present application is not limited to the above-mentioned preferred embodiments, and any person can obtain various other products without departing from the scope of the present application, but any changes in shape or structure of the present application are within the scope of the present application.
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| CN108426789A (en) * | 2018-05-12 | 2018-08-21 | 中国铁路设计集团有限公司 | Shearing test system and its test method in the hole of deep layer original position |
| CN219161881U (en) * | 2022-12-01 | 2023-06-09 | 宁波大学 | Two-in-one drilling shear test system |
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| CN103603625B (en) * | 2013-12-06 | 2017-04-26 | 中国地质科学院探矿工艺研究所 | Casing coring drilling tool and casing coring drilling method |
| CN208239220U (en) * | 2018-05-12 | 2018-12-14 | 中国铁路设计集团有限公司 | Shear tester in hole in situ |
| CN208999199U (en) * | 2018-10-26 | 2019-06-18 | 机械工业勘察设计研究院有限公司 | A kind of drilling boxshear apparatus normal direction stress loading device |
| CN211627239U (en) * | 2020-02-26 | 2020-10-02 | 机械工业勘察设计研究院有限公司 | Automatic change drilling shear apparatus |
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| CN108426789A (en) * | 2018-05-12 | 2018-08-21 | 中国铁路设计集团有限公司 | Shearing test system and its test method in the hole of deep layer original position |
| CN219161881U (en) * | 2022-12-01 | 2023-06-09 | 宁波大学 | Two-in-one drilling shear test system |
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