CN112326337A - Automatic sampling device and method for cement soil mixing pile slurry - Google Patents
Automatic sampling device and method for cement soil mixing pile slurry Download PDFInfo
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- CN112326337A CN112326337A CN202011269803.9A CN202011269803A CN112326337A CN 112326337 A CN112326337 A CN 112326337A CN 202011269803 A CN202011269803 A CN 202011269803A CN 112326337 A CN112326337 A CN 112326337A
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
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- 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
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
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Abstract
The invention discloses a device and a method for automatically sampling slurry of a cement soil mixing pile, wherein the device comprises a drill rod and a slurry cabin, the slurry cabin is fixedly arranged on the drill rod, the lower end of the slurry cabin is provided with a liquid inlet, a valve is arranged at the position of the liquid inlet, the liquid inlet faces to the forward rotation direction of the drill rod, the upper end of the slurry cabin is provided with a cover plate, the cover plate is in sliding connection with the slurry cabin, the cover plate slides open along the reverse rotation direction, the forward rotation direction is the drilling rotation direction of the drill rod, and the reverse rotation direction is the lifting rotation direction of. The invention realizes the automatic sampling of the slurry, simplifies the slurry sampling work, improves the sampling efficiency, can be recycled by simply cleaning the device after the sampling work is finished, has low manufacturing cost and simple maintenance, is particularly suitable for severe environment and has low failure rate.
Description
Technical Field
The invention relates to the technical field of constructional engineering, in particular to a device and a method for automatically sampling cement soil mixing pile slurry.
Background
When a building is built on soil layers such as filling soil, silt, mucky soil, cohesive soil, silt, sandy soil, saturated loess and the like, if a natural foundation bearing layer cannot meet the horizontal and vertical bearing requirements, certain replacement and reinforcement measures need to be taken on the soil layers, wherein cement soil mixing piles are most widely applied.
The cement soil mixing pile uses cement as a curing agent, forcibly mixes the soft soil and the curing agent in the deep part of the foundation through a special mixing machine, and uses a series of physical and chemical reactions generated between the curing agent and the soft soil to harden the soft soil into a high-quality foundation with integrity, water stability and certain strength. When a drill rod of the single-shaft cement-soil mixing pile construction machine rotates clockwise, a drill bit drills downwards, and when the drill rod rotates anticlockwise, the drill bit lifts upwards; the three-shaft stirring pile is provided with three drill rods, wherein the two drill rods on two sides have the same rotation rule as the single-shaft drill rod, and the middle drill rod is opposite to the rotation rule.
Section steel cement soil stirring wall technical regulation (JGJT 199 and 2010)6.2.5 notes: the pile body strength of the cement soil mixing pile is preferably determined by adopting a slurry test block strength test, and can also be determined by adopting a drilling coring strength test. At present, a slurry test block mode is mostly adopted in actual construction, namely slurry of a cement soil mixing pile which is just mixed and is not solidified is taken to manufacture the test block, 1 pile is required to be selected and inspected in each class, each pile is required to be not less than 2 sampling points, and 3 test blocks are required to be manufactured in each sampling point. The sampling points are arranged in the mixing pile at the weakest soil layer above the pile bottom within the range of 1 meter above the designed pile bottom elevation. And sealing the test block in time, and performing unconfined compressive strength test after 28 days of underwater maintenance to judge whether the construction quality of the cement-soil mixing pile meets the design requirement.
The existing slurry sampling device mostly adopts a long probe rod or a rope to probe a sampling cabin to a corresponding sampling point, the sampling cabin is opened under the ground manual control, and after the cabin is filled with slurry, the sampling cabin is manually closed again to finish sampling. The sampling method manually controls the operations of opening and closing the cabin to be clumsy and inconvenient; when the sampling depths are different, the length of the probe rod needs to be measured and calculated for multiple times; mechanical failures tend to occur when the sampling depth is deep and long probes or ropes are made.
Therefore, a simpler and more reliable slurry sampling device and method are needed, which can overcome the above defects and ensure the convenience and scientificity of sampling work.
Disclosure of Invention
The invention aims to solve the technical problems that the automatic sampling device and the method for the cement-soil mixing pile slurry are provided aiming at the defects in the prior art, the automatic sampling of the slurry is realized, the slurry sampling work is simplified, the sampling efficiency is improved, the device is simply cleaned after the sampling work is finished, the device can be recycled, the manufacturing cost is low, the maintenance is simple, and the device is particularly suitable for severe environments and has low failure rate.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the utility model provides a soil cement mixing pile thick liquid automatic sampling device, including drilling rod and thick liquid cabin, the thick liquid cabin sets firmly on the drilling rod, the lower extreme in thick liquid cabin is equipped with the inlet, inlet department is equipped with the valve, the inlet is towards drilling rod forward direction of rotation, the upper end in thick liquid cabin is equipped with the apron, apron and thick liquid cabin sliding connection, the apron slips away along reverse direction of rotation, the forward direction of rotation is drilling rod and creeps into direction of rotation, generally be clockwise, reverse direction of rotation is drilling rod promotion direction of rotation, generally be anticlockwise.
According to the technical scheme, the valve is a one-way valve, the one-way valve is opened under the action of impact force of slurry when the drill rod rotates forwards, and the one-way valve is closed when the drill rod rotates backwards.
According to the above technical scheme, the check valve includes the spring, spacing steel sheet and valve head, form spacing chamber between the bottom plate in spacing steel sheet and thick liquid cabin, spacing chamber transverse arrangement, spacing chamber is towards the inlet, the valve head is connected with the valve rod, the valve rod sets up in spacing intracavity, the valve rod slides along spacing chamber, be connected with the spring between the bottom of valve head and the spacing chamber, the valve head withstands the inlet under the effect of spring force under no exogenic action, make the inlet close, the valve head overcomes the spring force under the effect of thick liquid impact force when the drilling rod forward rotation, remove to spacing chamber bottom, make the inlet open.
According to the technical scheme, the opening and closing damping of the one-way valve and the cover plate can meet the sampling requirement.
According to the technical scheme, the slurry cabin is made of a steel plate with the thickness of 2-4 mm.
According to the technical scheme, the two ends of the slurry cabin are connected with the fixing plates, and the fixing plates are fixedly connected with the drill rod through bolts.
According to the technical scheme, the bolt is fixedly arranged on the drill rod through welding.
According to the technical scheme, the slurry cabin is a cube, and the length, width and height of the cube are 12-15 cm.
According to the technical scheme, a sliding device is arranged between the cover plate and the slurry cabin.
According to the technical scheme, the sliding device is a sliding rail which is arranged on the side wall of the slurry cabin; the cover plate is arranged on the slide rail and slides back and forth along the slide rail.
The sampling method of the automatic sampling device for the cement-soil mixing pile slurry comprises the following steps:
1) selecting the corresponding elevation position of the sampling point;
2) when a drill rod where the sampling device is located drills in a forward rotating mode, slurry flows towards the liquid inlet, the one-way valve is opened under the action of slurry impact force, the slurry enters the cabin, the cover plate is opened under the action of the slurry in a sliding mode along the sliding rail, and the slurry continues to flow out of the opening of the cover plate;
3) in the downward drilling process of the drill rod, the slurry in the slurry cabin continuously flows in and out and is always updated;
4) after the drill rod drills to the designed pile bottom elevation, the drill rod rotates in the opposite direction to lift, slurry does not flow to the liquid inlet any more, the liquid inlet is automatically closed by the one-way valve under the impact action of no slurry, the cover plate is also automatically closed under the rotation action, and the slurry in the slurry cabin is in a sealed state until the slurry is lifted to the ground;
5) the slurry in the slurry chamber was taken out as a sample.
The invention has the following beneficial effects:
the invention has simple structure, does not need separate power and control operation, can realize the opening and closing of the one-way valve and the cover plate through the rotation of the drilling rod during the drilling and lifting, realizes the automatic sampling of the slurry, simplifies the slurry sampling work, improves the sampling efficiency, and simply cleans the device after the sampling work is finished, thereby being capable of recycling, having low manufacturing cost, simple maintenance, being particularly suitable for severe environment and low failure rate.
Drawings
FIG. 1 is a schematic structural diagram of an automatic sampling device for cement-soil mixing pile slurry during clockwise rotation drilling of a drill rod in the embodiment of the invention;
FIG. 2 is a schematic structural diagram of an automatic sampling device for cement-soil mixing pile slurry when a drill rod is lifted in a counterclockwise rotating manner according to an embodiment of the invention;
FIG. 3 is a schematic structural diagram of an automatic sampling device for cement-soil mixing pile slurry in the embodiment of the invention;
in the figure, 1-drill rod, 2-fixing plate, 3-liquid inlet, 4-one-way valve, 5-spring, 6-slurry chamber, 7-cover plate and 8-sliding device.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and examples.
Referring to fig. 1 to 3, an automatic sampling device for cement mixing pile slurry in one embodiment of the present invention includes a drill rod 1 and a slurry chamber 6, the slurry chamber 6 is fixedly disposed on the drill rod 1, a liquid inlet 3 is disposed at a lower end of the slurry chamber 6, a valve is disposed at the liquid inlet 3, the liquid inlet 3 faces a forward rotation direction of the drill rod 1, a cover plate 7 is disposed at an upper end of the slurry chamber 6, the cover plate 7 is slidably connected to the slurry chamber 6, the cover plate 7 slides open along a reverse rotation direction, the forward rotation direction is a drilling rotation direction of the drill rod 1, generally a clockwise direction, and the reverse rotation direction is a lifting rotation direction of the drill rod 1, generally an anticlockwise direction.
Further, the valve is a check valve 4, when the drill rod 1 rotates forwards, the check valve 4 is opened under the action of impact force of slurry, and when the drill rod 1 rotates backwards, the check valve 4 is closed.
Further, check valve 4 includes spring 5, spacing steel sheet and valve head, form spacing chamber between the bottom plate in spacing steel sheet and thick liquid cabin 6, spacing chamber transverse arrangement, spacing chamber is towards inlet 3, the valve head is connected with the valve rod, the valve rod sets up in spacing intracavity, the valve rod slides along spacing chamber, be connected with spring 5 between the bottom of valve head and the spacing chamber, the valve head withstands inlet 3 under the effect of spring 5 power under no exogenic action, make inlet 3 close, spring 5 power is overcome to the valve head under the effect of thick liquid impact force when 1 forward rotation of drilling rod, remove to spacing chamber bottom, make inlet 3 open.
Furthermore, a sliding device 8 and a limiting device are arranged between the cover plate 7 and the sampling device; the opening and closing damping of the one-way valve 4 and the cover plate 7 should meet the sampling requirement.
Further, the slurry chamber 6 is made of a steel plate having a thickness of 2 to 4 mm.
Furthermore, the two ends of the slurry chamber 6 are connected with fixing plates 2, and the fixing plates 2 are connected and fixed with the drill rod 1 through bolts.
Further, the bolt is fixedly arranged on the drill rod 1 by welding.
Further, the slurry chamber 6 is a cube having a length, width and height of 12-15 cm.
Further, a sliding device 8 is provided between the cover plate 7 and the slurry chamber 6.
Further, the sliding device 8 is a sliding rail arranged on the side wall of the slurry chamber 6; the cover plate 7 is arranged on the slide rail and slides back and forth along the slide rail.
The sampling method of the automatic sampling device for the cement-soil mixing pile slurry comprises the following steps:
1) selecting the corresponding elevation position of the sampling point;
2) when the drill rod 1 where the sampling device is located drills in a forward rotating mode, slurry flows towards the liquid inlet 3, the check valve 4 is opened under the action of slurry impact force, the slurry enters the cabin, the cover plate 7 is opened under the action of the slurry in a sliding mode along the sliding rail, and the slurry continues to flow out of the opening of the cover plate 7;
3) in the downward drilling process of the drill rod 1, the slurry in the slurry cabin 6 continuously flows in and out and is always updated;
4) after the drill rod 1 drills to the designed pile bottom elevation, the drill rod rotates in the opposite direction to lift, slurry does not flow to the liquid inlet 3 any more, the liquid inlet 3 is automatically closed by the check valve 4 under the impact action of no slurry, the cover plate 7 is also automatically closed under the rotation action, and the slurry in the slurry cabin 6 is in a sealed state until the slurry is lifted to the ground;
5) the slurry in the slurry chamber 6 was taken out as a sample.
The invention provides an automatic sampling device for slurry of a triaxial cement-soil mixing pile, which comprises a fixing plate 2, a bolt head and a nut, a liquid inlet 3, a one-way valve 4, a slurry cabin 6 and a cover plate 7.
And according to a preset sampling position, accurately welding a bolt head on the leftmost drill rod 1 of the triaxial mixing pile construction machine. Two symmetrically arranged fixing plates 2 are arranged on the left and the right of the sampling device, and round holes with the diameter of 1.5 cm are formed in each plate. The bolt head penetrates through the round hole and is screwed up through the nut, so that the sampling devices are respectively fixed on the drill rods 1 of the mixing pile construction machinery;
further, the main material of the sampling device is a steel plate with the thickness of 3 mm, and the fixing plate 2 and the sampling device are of an integrated structure.
Further, a spring 5 and a limiting steel plate are arranged in the one-way valve 4, and a sliding device 8 and a limiting device are arranged between the cover plate 7 and the sampling device; the opening and closing damping of the one-way valve 4 and the cover plate 7 should meet the sampling requirement.
Further, the slurry volume in chamber 6 of each sampling device should be able to fill three cubic molds with sides of 7.07 cm.
A triaxial cement-soil mixing pile slurry automatic sampling method specifically comprises the following steps:
1) and selecting the leftmost drill rod 1 of the three-shaft mixing pile construction machine. The first slurry sampling point is arranged at a position 0.5 m above the bottom of the drill rod, and the second slurry sampling point is arranged at a position 6 m above the bottom of the drill rod (corresponding to the weakest soil layer).
2) The sampling device is fixed on the drill rod 1 through a bolt head, a fixing plate 2 and a nut;
3) triaxial mixing pile construction machinery is normally under construction, and when drilling rod 1 bored downwards, the thick liquid can gush to inlet 3, and check valve spring 5 can contract this moment, and check valve 4 opens, and the thick liquid gets into in the cabin 6, and apron 7 also slides along slider 8 under the effect of thick liquid and drilling rod rotation this moment and opens, so the thick liquid can continue to flow from the apron opening part. During the downward drilling of the drill pipe 1, the slurry in the chamber 6 is always flowing and renewed.
4) After the drill rod 1 drills to the designed pile bottom elevation, the drill rod starts to rotate in the opposite direction to lift, at the moment, slurry does not flow into the liquid inlet 3 any more, the liquid inlet 3 can be automatically closed through the one-way valve 4, the cover plate 7 is also automatically closed under the action of anticlockwise rotation, and the slurry in the cabin 6 is in a sealed state until the slurry is lifted to the ground.
5) When the construction is finished, the slurry in the cabin 6 is the slurry sample at the selected height; the sampling device can be taken down by rotating the nut, the cover plate 7 is opened by sliding, the slurry is poured into three cubic molds with the side length of 7.07 cm, and the sampling work is finished.
According to the technical scheme, after the step 5) is finished, the sampling device can be continuously used after being cleaned.
The working principle of the invention is as follows: the cover plate can be automatically opened and closed by combining the rotation direction of the drill rod, and meanwhile, the liquid inlet can be automatically opened and closed by controlling the check valve. When the drill rod drills downwards, the liquid inlet and the cover plate are both in an open state, slurry enters from the liquid inlet and flows out from the opening of the cover plate, and therefore the slurry in the cabin flows and is updated. After the drill rod reaches the corresponding depth, the drill rod can start to rotate in the opposite direction, and the liquid inlet and the cover plate can be automatically closed at the moment, so that the slurry at the corresponding elevation position is brought to the ground, and the automatic sampling of the slurry is completed.
The invention mainly provides a cement soil mixing pile slurry automatic sampling device and a method, compared with the traditional sampling method, the device is more convenient, rapid and scientific, and meanwhile, due to the existence of a one-way valve and an openable cover plate, the automatic sampling is realized in the sampling process, the sampling process is simplified, and the uncertainty of personnel operation is reduced. Therefore, the invention has certain practical application value.
The above is only a preferred embodiment of the present invention, and certainly, the scope of the present invention should not be limited thereby, and therefore, the present invention is not limited by the scope of the claims.
Claims (10)
1. The utility model provides a soil cement mixing pile thick liquid automatic sampling device, a serial communication port, including drilling rod and thick liquid cabin, the thick liquid cabin sets firmly on the drilling rod, and the lower extreme in thick liquid cabin is equipped with the inlet, and inlet department is equipped with the valve, and the inlet is equipped with the apron towards drilling rod forward direction of rotation, and the upper end in thick liquid cabin is equipped with the apron, apron and thick liquid cabin sliding connection, the apron slips off along the reverse direction of rotation, and the forward direction of rotation is drilling rod and creeps into the direction of rotation, and the reverse direction of rotation is drilling rod promotion direction of rotation.
2. The automatic sampling device for cement-soil mixing pile slurry as recited in claim 1, wherein the valve is a one-way valve, the one-way valve is opened under the impact force of the slurry when the drill rod rotates in the forward direction, and the one-way valve is closed when the drill rod rotates in the reverse direction.
3. The automatic sampling device of cement-soil mixing pile slurry as recited in claim 2, characterized in that the one-way valve comprises a spring, a limiting steel plate and a valve head, a limiting cavity is formed between the limiting steel plate and the bottom plate of the slurry cabin, the limiting cavity is transversely arranged, the valve head is connected with a valve rod, the valve rod is arranged in the limiting cavity, the valve rod slides along the limiting cavity, the spring is connected between the valve head and the bottom of the limiting cavity, the valve head withstands the liquid inlet under the action of the spring force without external force, so that the liquid inlet is closed, the valve head overcomes the spring force under the action of slurry impact force when the drill rod rotates in the forward direction, and moves.
4. The automatic sampling device for cement-soil mixing pile slurry as recited in claim 1, wherein the slurry chamber is made of a steel plate with a thickness of 2-4 mm.
5. The automatic sampling device for cement-soil mixing pile slurry as recited in claim 1, wherein the slurry chamber is connected with fixing plates at both ends thereof, and the fixing plates are connected and fixed with the drill rod through bolts.
6. The automatic sampling device for cement-soil mixing pile slurry as recited in claim 5, wherein the bolt is fixedly secured to the drill rod by welding.
7. The automatic sampling device for cement-soil mixing pile slurry as recited in claim 1, wherein the slurry chamber is a cube having a length, width and height of 12-15 cm.
8. The automatic sampling device for cement-soil mixing pile slurry as recited in claim 1, wherein a sliding device is provided between the cover plate and the slurry chamber.
9. The automatic sampling device for cement-soil mixing pile slurry as claimed in claim 1, wherein the sliding device is a slide rail, and the slide rail is arranged on the side wall of the slurry chamber.
10. A sampling method using the automatic sampling device for cement-soil mixing pile slurry according to claim 1, characterized by comprising the steps of:
1) selecting the corresponding elevation position of the sampling point;
2) when a drill rod where the sampling device is located drills in a forward rotating mode, slurry flows towards the liquid inlet, the one-way valve is opened under the action of slurry impact force, the slurry enters the cabin, the cover plate is opened under the action of the slurry in a sliding mode along the sliding rail, and the slurry continues to flow out of the opening of the cover plate;
3) in the downward drilling process of the drill rod, the slurry in the slurry cabin continuously flows in and out and is always updated;
4) after the drill rod drills to the designed pile bottom elevation, the drill rod rotates in the opposite direction to lift, slurry does not flow to the liquid inlet any more, the liquid inlet is automatically closed by the one-way valve under the impact action of no slurry, the cover plate is also automatically closed under the rotation action, and the slurry in the slurry cabin is in a sealed state until the slurry is lifted to the ground;
5) the slurry in the slurry chamber was taken out as a sample.
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