CN117365275A - Hydraulic self-drilling side pressure equipment for shallow soil layer and use method - Google Patents
Hydraulic self-drilling side pressure equipment for shallow soil layer and use method Download PDFInfo
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- CN117365275A CN117365275A CN202311447922.2A CN202311447922A CN117365275A CN 117365275 A CN117365275 A CN 117365275A CN 202311447922 A CN202311447922 A CN 202311447922A CN 117365275 A CN117365275 A CN 117365275A
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- 239000002689 soil Substances 0.000 title claims abstract description 60
- 238000005553 drilling Methods 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000012360 testing method Methods 0.000 claims abstract description 34
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 27
- 239000010959 steel Substances 0.000 claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 34
- 239000012528 membrane Substances 0.000 claims description 8
- 238000004062 sedimentation Methods 0.000 claims description 7
- 230000001681 protective effect Effects 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 2
- 238000011065 in-situ storage Methods 0.000 abstract description 5
- 239000012530 fluid Substances 0.000 description 10
- 239000007921 spray Substances 0.000 description 9
- 239000003921 oil Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000013049 sediment Substances 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000005251 gamma ray Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
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- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses hydraulic self-drilling type side pressure equipment for shallow soil layers and a using method thereof, belonging to the technical field of engineering geology and geotechnical engineering, and comprising a main body structure and a power system, wherein the main body structure comprises a testing device and a drill bit, and the power system is connected with a detecting device and a testing pressurizing device; the drill bit comprises a seamless steel pipe, a central cavity is formed in the seamless steel pipe, a first thrust ball bearing and a second thrust ball bearing are arranged on the seamless steel pipe, a bearing cover is arranged at the top of the first thrust ball bearing and is connected with a rotating body, an oil seal framework is arranged between the seamless steel pipe and the rotating body, and a central jet nozzle and an oblique jet nozzle are arranged on the rotating body. The hydraulic self-drilling type side pressure equipment for the shallow soil layer and the application method thereof reduce the use cost when the self-drilling type side pressure test is applied to the soil layer, have low technical threshold and do not need special drilling machine operators to cooperatively perform in-situ test.
Description
Technical Field
The invention relates to the technical field of engineering geology and geotechnical engineering, in particular to hydraulic self-drilling side pressure equipment for a shallow soil layer and a use method thereof.
Background
The side pressure test is an in-situ test method for obtaining mechanical parameters such as soil strength, deformation modulus and the like by expanding an elastic membrane in a side pressure instrument in a drill hole, then applying uniform stress to surrounding soil until the soil on the hole wall is radially displaced until the soil is damaged, and obtaining the radial deformation relation between the pressure in the elastic membrane and the damaged soil. The self-drilling type side pressure tester is used for drilling the soil body to be tested in real time in the self-drilling type side pressure test, disturbance on the soil body is small, an elastic membrane in the side pressure tester is in good contact with the soil body, and obtained data are more accurate.
In the prior art, a common self-drilling type side pressure instrument is frequently used for rock strata, but a drilling machine needs professional operation, a motor is required to drive a sleeve to drill, and equipment is huge. And when the device is applied to soil layers, the cost is not easy to control because the device is heavy and expensive, and waste is caused.
Disclosure of Invention
The invention aims to provide hydraulic self-drilling side pressure equipment for shallow soil layers and a use method thereof, which reduce the use cost when the self-drilling side pressure test is applied to the soil layers, have low technical threshold and do not need special drilling machine operators to cooperatively perform in-situ test.
In order to achieve the aim, the invention provides hydraulic self-drilling side pressure equipment for shallow soil layers, which comprises a main body structure and a power system, wherein the main body structure comprises a testing device and a drill bit, and the power system is connected with a detecting device and a testing pressurizing device;
the drill bit comprises a seamless steel pipe, a central cavity is formed in the seamless steel pipe, a first thrust ball bearing and a second thrust ball bearing are arranged on the seamless steel pipe, a bearing cover is arranged at the top of the first thrust ball bearing and is connected with a rotating body, an oil seal framework is arranged between the seamless steel pipe and the rotating body, and a central jet nozzle and an oblique jet nozzle are arranged on the rotating body.
Preferably, the bearing cover is connected with the rotating body through an inner hexagon screw, grooves corresponding to the first thrust ball bearings and the second thrust ball bearings are formed in the rotating body, circlips are arranged between the first thrust ball bearings and the second thrust ball bearings, and the number of the inclined spraying nozzles is two.
Preferably, the testing device comprises an outer sleeve, a first clamping ring is arranged on the outer sleeve and connected with a cable protective sleeve, a second clamping ring is arranged below the first clamping ring, a third clamping ring is arranged below the second clamping ring, an elastic membrane is arranged between the second clamping ring and the third clamping ring, a fourth clamping ring is arranged below the third clamping ring, and the fourth clamping ring is connected with the drill protective sleeve.
Preferably, the first snap ring is connected with the second snap ring through the cable channel shell, the third snap ring is connected with the fourth snap ring through the fixed sleeve, an inner sleeve is arranged inside the outer sleeve, the inner sleeve is connected with the outer sleeve through the connecting rod, and the inner sleeve is connected with the seamless steel tube.
Preferably, the power system comprises a water tank, the water tank is connected with a high-pressure water pump through a first connecting pipe, the high-pressure water pump is connected with an inner layer of a second connecting pipe through a first hose, the second connecting pipe is connected with a lifting device, an outer layer of the second connecting pipe is connected with a sedimentation tank through a second hose, and a fixing frame is arranged on the second connecting pipe.
The invention also provides a use method of the hydraulic self-drilling side pressure equipment for the shallow soil layer, which comprises the following steps:
s1, leveling a site to be tested, and moving hydraulic self-drilling side pressure equipment to the point to be tested;
s2, lowering the main body structure to a designed elevation, and starting the high-pressure water pump;
s3, after the main body structure is drilled to the designed elevation, the high-pressure water pump and the lifting device are closed, and the testing part is started.
Therefore, the hydraulic self-drilling type side pressure equipment for the shallow soil layer and the application method thereof reduce the use cost when the self-drilling type side pressure test is applied to the soil layer, have low technical threshold and do not need special drilling machine operators to cooperatively perform in-situ test.
The technical scheme of the invention is further described in detail through the drawings and the embodiments.
Drawings
FIG. 1 is a schematic structural view of a main structure of a hydraulic self-drilling side pressure device for shallow soil and an embodiment of a using method of the present invention;
FIG. 2 is a schematic diagram of a hydraulic self-drilling side pressure device for shallow soil and a drill bit according to an embodiment of the method of the present invention;
FIG. 3 is a top view of a hydraulic self-drilling side pressure device for shallow soil and a drill bit according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a hydraulic self-drilling side pressure device for shallow soil and a power system for an embodiment of a method of use according to the present invention;
FIG. 5 is a three-dimensional view of a hydraulic self-drilling side pressure device for shallow soil and a bit basin according to an embodiment of the method of the present invention;
FIG. 6 is a top view of a basin at the interior cavity of a drill bit of an embodiment of the hydraulic self-drilling side pressure device for shallow soil layers and method of use of the present invention; .
Reference numerals
101. An outer sleeve; 102. a second snap ring; 103. a cable channel housing; 104. a third snap ring; 105. a fixed sleeve; 106. an elastic film; 107. a first snap ring; 108. a cable protective sleeve; 109. a fourth snap ring; 110. a drill bit casing; 111. a connecting rod; 112. an inner sleeve; 113. a seamless steel pipe; 114. a first thrust ball bearing; 115. a circlip; 116. a second thrust ball bearing; 117. a rotating body; 118. an inner hexagon screw; 119. a bearing cap; 120. an oil seal framework; 121. a central chamber; 122. a central jet nozzle; 123. an oblique spray nozzle; 201. a high pressure water pump; 202. a first connection pipe; 203. a water tank; 204. a first hose; 205. a second connection pipe; 206. a lifting device; 207. a second hose; 208. a sedimentation tank; 209. and a fixing frame.
Detailed Description
The technical scheme of the invention is further described below through the attached drawings and the embodiments.
Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs.
As shown in the figure, the invention provides hydraulic self-drilling side pressure equipment for shallow soil layers, which comprises a main body structure and a power system, wherein the power system is connected with a detection device and a test pressure device, the power system can provide power for the main body structure, and the detection device and the test pressure device can test the self-drilling side pressure test. The main structure comprises a testing device and a drill bit, wherein the testing device can detect the soil layer, and the drill bit can drill the soil layer.
The testing device comprises an outer sleeve 101, an inner sleeve 112 is arranged inside the outer sleeve 101, and the inner sleeve 112 is connected with the outer sleeve 101 through a connecting rod 111. The outer sleeve 101 is provided with a first snap ring 107, and the outer sleeve 101 provides support for the first snap ring 107. The first snap ring 107 is fixed to the cable protection sleeve 108 above the first snap ring 107 and the cable protection sleeve 108. The first snap ring 107 below is equipped with second snap ring 102, and first snap ring 107 passes through cable passageway shell 103 and is connected with second snap ring 102, and second snap ring 102 below is equipped with third snap ring 104, is equipped with elastic membrane 106 in the middle of second snap ring 102 and the third snap ring 104. The second clamping ring 102 and the third clamping ring 104 fix the elastic membrane 106, the elastic membrane 106 plays a role in protecting the cable, the cable channel housing 103 provides a channel for the cable to pass through the second clamping ring 102 and the first clamping ring 107, and the cable protection sleeve 108 provides protection for the cable.
A fourth clamping ring 109 is arranged below the third clamping ring 104, the third clamping ring 104 is connected with the fourth clamping ring 109 through a fixing sleeve 105, and the fixing sleeve 105 can fix the third clamping ring 104 and the fourth clamping ring 109. The fourth clamping ring 109 is connected with the drill bit casing 110, the fourth clamping ring 109 fixes the drill bit casing 110, and the drill bit casing 110 can protect a drill bit.
The drill bit comprises a seamless steel pipe 113, a first thrust ball bearing 114 and a second thrust ball bearing 116 are arranged on the seamless steel pipe 113, a circlip 115 is arranged between the first thrust ball bearing 114 and the second thrust ball bearing 116, and the circlip 115 plays a limiting role on the first thrust ball bearing 114 and the second thrust ball bearing 116. The top of the first thrust ball bearing 114 is provided with a bearing cover 119, the bearing cover 119 is connected with the rotating body 117 through an inner hexagonal screw 118, and the rotating body 117 is provided with grooves corresponding to the first thrust ball bearing 114 and the second thrust ball bearing 116. The socket head cap screws 118 fix the rotating body 117 and the bearing cap 119, and the rotating body 117 and the bearing cap 119 limit the first thrust ball bearing 114 and the second thrust ball bearing 116, and the first thrust ball bearing 114 and the second thrust ball bearing 116 enable the rotating body 117 to rotate around the seamless steel pipe 113.
An oil seal skeleton 120 is provided between the seamless steel pipe 113 and the rotary body 117, and the oil seal skeleton 120 prevents the lubricating oil from oozing out. The seamless steel tube 113 is connected with the inner sleeve 112, a central cavity 121 is formed inside the seamless steel tube 113, a central spray nozzle 122 and two oblique spray nozzles 123 are arranged on the rotating body 117, and the two oblique spray nozzles 123 are symmetrical with respect to the center spray nozzle 122. The liquid of the inner sleeve 112 flows into the rotary body 117 through the central chamber 121 and out through the central jet nozzle 122 and the two oblique jet nozzles 123, while the rotary body 117 spins due to the jet deflection force and generates a high-pressure rotary jet.
The power system comprises a water tank 203, the water tank 203 is connected with a high-pressure water pump 201 through a first connecting pipe 202, the high-pressure water pump 201 is connected with the inner layer of a second connecting pipe 205 through a first hose 204, and the high-pressure water pump 201 can enable water in the water tank 203 to flow into the inner layer of the second connecting pipe 205 along the first connecting pipe 202 and the first hose 204. The second connecting pipe 205 is connected to a lifting device 206, and the lifting device 206 can drive the second connecting pipe 205 to rise and fall. The outer layer of the second connecting pipe 205 is connected with a sedimentation tank 208 through a second hose 207, and in the drilling process, the output liquid and sediment can flow into the sedimentation tank 208 through the second connecting pipe 205 and the second hose 207, and the sediment is precipitated in the sedimentation tank 208. The second connecting pipe 205 is provided with the fixing frame 209, and the fixing frame 209 can fix the second connecting pipe 205, so that the position of the second connecting pipe 205 is prevented from being deviated due to the spin of the jet flow by the rotating body 117 to influence the test result.
The application method of the hydraulic self-drilling side pressure equipment for the shallow soil layer comprises the following steps:
s1, leveling a site to be tested, and moving hydraulic self-drilling side pressure equipment to the point to be tested;
and flattening the field to be tested, and reserving a wider and flat ground. The whole hydraulic self-drilling side pressure equipment is moved to a point to be tested, the lifting device 206 drives the second connecting pipe 205 and the main structure of the hydraulic self-drilling side pressure equipment connected with the second connecting pipe to descend to the designed height (100 mm from the ground), and the lifting device 206 is closed.
S2, lowering the main body structure to a designed elevation, and starting the high-pressure water pump;
after the hydraulic self-drilling type side pressure equipment is lowered to the designed elevation, the high-pressure water pump 201 is started, water flows from the water tank 203, flows through the high-pressure water pump 201, the first hose 204 and then flows to the inner layer of the second connecting pipe 205, finally enters the self-rotating jet drill bit in the main body structure of the hydraulic self-drilling type side pressure equipment, water jet is sprayed out from three jet nozzles of the drill bit, and meanwhile the drill bit is rotated by jet deflection force to generate high-pressure rotating jet flow. After about 5 seconds of jet formation, the elevator 206 is turned on and the body structure is continued to be lowered. During the drilling process, the output water and sediment are sucked into the sedimentation tank 208 through the passage between the inner and outer layers of the second connection pipe 205, forming a positive circulation.
The driving principle of the drill bit is that the high-pressure water pump 201 pressurizes fluid, the fluid is conveyed to the central chamber 121 of the drill bit through the inner layers of the first hose 204 and the second connecting pipe 205 and the seamless steel pipe 113, and high-pressure jet flow is generated through the central jet nozzle 122 and the two oblique jet nozzles 123. The self-drilling jet drill bit fluid field is composed of a central chamber 121, a central jet 122 and two oblique jets 123, the projections of the two oblique jets 123 of the rotating body 117 on the OXZ cross section are symmetrical about the origin, and the projections of the two are parallel to each other. The fluid is divided into three jet flows after passing through the central chamber 121, and the fluid ejected from the central jet nozzle 122 provides strong jet impact force to cut soil body, but does not generate torque on the rotary body 117; when the fluid passes through the inlet ends of the two oblique jetting nozzles 123, the fluid is turned due to the constraint of the wall surface far away from the OYZ section, and the pressure of the wall surface is increased sharply; meanwhile, due to the mutation deflection of the fluid, wake vortex energy consumption is generated near the wall surface near the side which is far away from the OYZ section, the pressure difference of the two side wall surfaces provides torque for the rotating body 117, and the rotational power is provided together with the jet counter-thrust component provided by the inclined jet nozzle 123 at the OXZ section, so that a fixed jet flow along the drilling direction and two inclined rotational jet flows are generated, and soil bodies are cut together.
The kinetic model of the self-drilling jet drill bit is as follows:
the jet flow counter-thrust of the oblique jet nozzle is obtained by simulation experiments according to the component of the cross section of OXZ, and the jet flow counter-thrust is less than 1% of the wall pressure difference component in terms of the rotation moment provided by the drill bit, so that the dynamic model mainly discusses the spin power provided by the pressure difference.
The component of the pressure difference OXZ across the wall of the oblique nozzle and perpendicular to the wall.
From the momentum theorem it follows that: the increment of the particle system momentum is equal to the impulse of the external force acting on the particle system, namely:
F fi is an external force acting on the particles; ρ is the fluid density; g Total (S) Jet flow of the oblique jet nozzle; beta 1 、β 2 The impulse correction coefficient;is the average flow velocity of the cross section at the upstream of the corner of the oblique jet nozzle; />Is the average flow velocity of the cross section of the corner downstream of the oblique spray nozzle.
The calculation formula of the acting force of the liquid on the inclined spray nozzle wall surface is as follows:
the component along OXZ section and perpendicular to the wall (the component along the X axis in the formula) provides the rotational power for the rotator.
Because the drill bit is short in size, the loss along the way is negligible, and the local loss is mainly concentrated in the following three positions: the center jet nozzle of the rotating body and the inlets of the two oblique jet nozzles. Only the pressure difference OXZ section generated by two inclined jet nozzles on the wall surface and the loss energy of the component perpendicular to the wall surface can provide spin power for the drill bit, the inlet of the inclined jet nozzles can be regarded as the superposition of two sharp edge inclined inlets, and the total head loss formula is obtained by the energy loss superposition principle because the along-path loss is negligible:
h j is a local head loss; v i Is the flow velocity at the local corners; zeta type i Is a local resistance coefficient; zeta type 1 Local loss coefficients for the first sharp-edged oblique entry; zeta type 2 Local loss coefficients for the second sharp-edged oblique entry; alpha is the horizontal angle of the oblique spray nozzle; e is the eccentricity of the oblique spray nozzle; r is the radius of the central chamber; g is gravity acceleration; gamma ray 1 、γ 2 、γ 3 As coefficient ratio, gamma 1 ＝0.505、γ 2 ＝0.303、γ 3 ＝0.226。
Knowing its total head loss we can derive the intracavity constant total flow bernoulli equation:
the method comprises the following steps:
z 1 、z 2 the water heads are respectively arranged at the cross section positions of the upper and the lower stream of the corner of the oblique jet nozzle;the cross section pressure water heads are respectively arranged at the upper and the lower stream of the corner of the oblique jet nozzle; />The cross section velocity water heads at the upper and downstream positions of the corner of the oblique jet nozzle are respectively.
From equations (5) and (2), if the flow (or flow velocity) and pressure of a section upstream of the abrupt change of the oblique jet nozzle are known, the spin power of the fluid supplied to the drill bit and the jet velocity downstream of the abrupt change of the oblique jet nozzle can be obtained in consideration of the local head loss (neglected selection due to small loss of the path).
The mechanical model of the drill bit-soil contact surface is as follows:
although the jet flow generated by the drilling tool can cut and saturate the soil body, the resistance of the contact surface of the drill bit and the soil is greatly reduced, the friction force of the soil to the drill bit still needs to be considered conservatively in the theoretical calculation process, and the drill bit is prevented from being stuck under the severe condition.
Because the size of the drill bit is relatively smaller under the actual working condition, the influence variable quantity of the dead weight stress of the soil body on the drill bit is smaller, so that the drill bit can be turned into a spot. According to the effective stress principle, the stress of a certain point in the soil body can be obtained, and the shear strength of the drill bit-soil contact surface at a certain depth point is obtained through the Moulomb shear strength breaking criterion.
The surface material of the drill bit is STEEL (the material of the rotary body and the bearing cap is STEEL 45), so the contact surface is a soil-STEEL contact surface. The friction angle of each contact type can be known from the shear test results. The shear strength of the soil body is a main factor for determining the friction resistance, the softening phenomenon of the steel-soil contact surface occurs in the shearing test process, and the softening coefficient tends to increase along with the increase of the normal stress.
Therefore, the steel-soil contact interface has a softening phenomenon when the normal stress caused by the self-weight stress is constant and the displacement tends to be increased and then reduced along with the increase of the displacement, so that the softening coefficient needs to be considered when the shearing stress of a certain point of the steel-soil contact surface is calculated. And then according to the side area and top and bottom area of the bit rotor (rotating body, bearing cover and bolt) contacted with the soil, the resistance torque of the soil to the bit under a certain depth in a theoretical state is calculated, and the formula is as follows:
R 1 、R 2 the outer radius of the seamless steel tube and the outer radius of the rotating body are respectively; mu is the softening coefficient; c is cohesive force;the friction angle of the contact surface of sand and steel; sigma (sigma) Z Normal stress of each contact surface caused by self-weight stress; l is the lubrication, impact and softening coefficient of jet flow to soil mass, which is less than 1; k (K) 0 Is the static soil pressure coefficient.
According to the formula (6), the resistance torque of the drill bit after entering a certain depth of the soil body in an ideal state can be calculated, and the theoretical feasibility of the spin property of the drill bit under the soil is calculated when the drill bit enters the soil layer and is smaller than 12 m.
S3, after the main body structure is drilled to the designed elevation, the high-pressure water pump and the lifting device are closed, and the test part is started;
after the main body structure of the hydraulic self-drilling type side pressure equipment is drilled to the designed elevation, the high-pressure water pump 201 and the lifting device 206 are closed, the testing part is opened, and the self-drilling type side pressure test is performed. After the hole depth test is finished, the main body structure of the hydraulic self-drilling side pressure equipment can be retracted through the lifting device 206, or the second connecting pipe 205 can be lengthened, and drilling can be continued until the next soil layer to be tested.
Therefore, the hydraulic self-drilling type side pressure equipment for the shallow soil layer and the application method thereof reduce the use cost when the self-drilling type side pressure test is applied to the soil layer, have low technical threshold and do not need special drilling machine operators to cooperatively perform in-situ test.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention and not for limiting it, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that: the technical scheme of the invention can be modified or replaced by the same, and the modified technical scheme cannot deviate from the spirit and scope of the technical scheme of the invention.
Claims (6)
1. A hydraulic self-drilling side pressure device for shallow soil layers is characterized in that: the device comprises a main body structure and a power system, wherein the main body structure comprises a testing device and a drill bit, and the power system is connected with a detection device and a testing pressurizing device;
the drill bit comprises a seamless steel pipe, a central cavity is formed in the seamless steel pipe, a first thrust ball bearing and a second thrust ball bearing are arranged on the seamless steel pipe, a bearing cover is arranged at the top of the first thrust ball bearing and is connected with a rotating body, an oil seal framework is arranged between the seamless steel pipe and the rotating body, and a central jet nozzle and an oblique jet nozzle are arranged on the rotating body.
2. A shallow soil hydraulic self-drilling side pressure apparatus as claimed in claim 1, wherein: the bearing cover is connected with the rotating body through an inner hexagon screw, grooves corresponding to the first thrust ball bearings and the second thrust ball bearings are formed in the rotating body, elastic check rings are arranged between the first thrust ball bearings and the second thrust ball bearings, and the number of the inclined spraying nozzles is two.
3. A shallow soil hydraulic self-drilling side pressure apparatus as claimed in claim 1, wherein: the testing device comprises an outer sleeve, a first clamping ring is arranged on the outer sleeve and connected with a cable protective sleeve, a second clamping ring is arranged below the first clamping ring, a third clamping ring is arranged below the second clamping ring, an elastic membrane is arranged between the second clamping ring and the third clamping ring, a fourth clamping ring is arranged below the third clamping ring, and the fourth clamping ring is connected with a drill bit protective sleeve.
4. A shallow soil hydraulic self-drilling side pressure apparatus according to claim 3, wherein: the first snap ring is connected with the second snap ring through the cable channel shell, the third snap ring is connected with the fourth snap ring through the fixed sleeve, the inside inlayer sleeve that is equipped with of outer sleeve, inlayer sleeve pass through the connecting rod with outer sleeve connects, inlayer sleeve with seamless steel tube connects.
5. A shallow soil hydraulic self-drilling side pressure apparatus as claimed in claim 1, wherein: the power system comprises a water tank, the water tank is connected with a high-pressure water pump through a first connecting pipe, the high-pressure water pump is connected with an inner layer of a second connecting pipe through a first hose, the second connecting pipe is connected with a lifting device, an outer layer of the second connecting pipe is connected with a sedimentation tank through a second hose, and a fixing frame is arranged on the second connecting pipe.
6. A method of using a hydraulic self-drilling side pressure apparatus for shallow soil according to any one of claims 1-5, wherein: the method comprises the following steps:
s1, leveling a site to be tested, and moving hydraulic self-drilling side pressure equipment to the point to be tested;
s2, lowering the main body structure to a designed elevation, and starting the high-pressure water pump;
s3, after the main body structure is drilled to the designed elevation, the high-pressure water pump and the lifting device are closed, and the testing part is started.
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| CN202311447922.2A CN117365275B (en) | 2023-11-02 | 2023-11-02 | Hydraulic self-drilling type side pressure equipment for shallow soil layer |
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| CN202311447922.2A CN117365275B (en) | 2023-11-02 | 2023-11-02 | Hydraulic self-drilling type side pressure equipment for shallow soil layer |
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| CN117365275B CN117365275B (en) | 2024-06-14 |
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| CN102926369A (en) * | 2012-11-14 | 2013-02-13 | 刘潋 | Pre-boring pressure meter, self-boring pressure meter and self-boring pressure metering equipment |
| CN203096708U (en) * | 2012-11-14 | 2013-07-31 | 刘潋 | Preboring pressure meter, self-boring pressure meter and self-boring pressure equipment |
| CN105370213A (en) * | 2015-06-18 | 2016-03-02 | 中石化石油工程技术服务有限公司 | Underground pulsing jet drill bit device |
| CN106437529A (en) * | 2016-09-27 | 2017-02-22 | 中石化石油工程技术服务有限公司 | Equal flow pulse jet drilling bit device and design method thereof |
| CN210768587U (en) * | 2019-09-21 | 2020-06-16 | 镇江市勘察测绘研究院 | Side pressure test device |
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