CN210464836U - Earth-rock dam cut-off wall quality detection structure - Google Patents
Earth-rock dam cut-off wall quality detection structure Download PDFInfo
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- CN210464836U CN210464836U CN201921592652.3U CN201921592652U CN210464836U CN 210464836 U CN210464836 U CN 210464836U CN 201921592652 U CN201921592652 U CN 201921592652U CN 210464836 U CN210464836 U CN 210464836U
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Abstract
The utility model relates to an earth and rockfill dam cut-off wall quality detection structure, the expansion pipe suit is in the lower liquid pipe periphery, two expansion pipes are high-low position setting on the lower liquid pipe, form the expansion chamber between expansion pipe and the lower liquid pipe, have seted up a plurality of gas pockets and apopores on the lower liquid pipe periphery wall through, the gas pocket is communicated with the expansion chamber, the apopore is located between two expansion pipes, still install the pipe in the lower liquid pipe inner chamber; the liquid outlet of last liquid pipe and the inlet of stalk intercommunication, the inlet and the liquid supply pipe intercommunication of last liquid pipe, the periphery cover of last liquid pipe is equipped with the disc, the gas outlet of bleed pipe and the air inlet intercommunication of intake pipe, the air inlet of bleed pipe and the gas outlet intercommunication of gas supply line, the gas outlet of gas supply line still communicates through the air inlet of pipeline and last liquid pipe, all installs the manometer on gas supply line and the liquid supply pipe. The utility model discloses requirement to the operation is low, and the testing result is accurate, reliable to can detect the quality of cut-off wall on the different degree of depth, and detection efficiency is high.
Description
Technical Field
The utility model relates to a infiltration detects the field, especially relates to an earth and rockfill dam cut-off wall quality testing structure.
Background
The impervious wall is a continuous wall which is built in a loose permeable layer or an earth-rock dam (weir) and plays a role in seepage prevention, has the advantages of reliable structure, good seepage prevention effect, adaptation to various stratum conditions, simple and convenient construction, low manufacturing cost and the like, and particularly has good effect on treating the hidden danger of seepage deformation such as dam foundation seepage, behind-dam 'soil flow' and 'piping', so the impervious wall is a main engineering in hydraulic engineering and has important engineering quality. In order to ensure the engineering quality of the impervious wall, the impervious wall needs to be subjected to quality detection. The utility model discloses a patent number 201220282872.8's utility model discloses a detect water injection test device of high groundwater level cut-off wall body quality, the device utilize the only thick liquid stopper of curtain slip casting to block the contact that drilling upper portion passed soil body section and test section, pass only thick liquid stopper with one section PVC pipe simultaneously and cause the earth's surface, make water injection, downthehole water level, water yield survey all at the operation of earth's surface, judge cut-off wall body quality according to measured data. However, the device can only judge the wall quality of the impervious wall on the whole, and when the quality of the impervious wall is poor, the actual part with poor quality cannot be accurately judged, so that certain difficulty is brought to the repair operation of the impervious wall.
SUMMERY OF THE UTILITY MODEL
The utility model discloses just not enough to prior art exists provides an earth and rockfill dam cut-off wall quality testing structure.
In order to solve the above problems, the utility model adopts the following technical proposal:
the utility model provides an earth and rockfill dam cut-off wall quality testing structure, includes: the device comprises a detection main body, a lifting mechanism and a liquid injection mechanism; the detection main body comprises a liquid discharge pipe and two expansion pipes, the expansion pipes are sleeved on the periphery of the liquid discharge pipe, the two expansion pipes are arranged on the liquid discharge pipe in a high-low position, an expansion cavity is formed between each expansion pipe and the liquid discharge pipe, a plurality of air holes and water outlet holes are formed in the peripheral wall of the liquid discharge pipe in a penetrating mode, the air holes are communicated with the expansion cavities, the water outlet holes are located between the two expansion pipes, a guide pipe is fixedly installed in the inner cavity of the liquid discharge pipe, one end of the guide pipe is communicated with the expansion cavities through the air holes, the other end of the guide pipe is communicated with an air inlet pipe, the air inlet pipe is coaxially installed in the inner cavity of the; the lifting mechanism is used for driving the detection main body to perform lifting motion; the liquid injection mechanism comprises a liquid feeding pipe and a gas leading pipe, a liquid outlet of the liquid feeding pipe is communicated with a liquid inlet of the liquid discharging pipe, the liquid inlet of the liquid feeding pipe is communicated with a liquid feeding pipeline, a disc is sleeved on the periphery of the liquid feeding pipe, a gas outlet of the gas leading pipe is communicated with a gas inlet of a gas inlet pipe, the gas inlet of the gas leading pipe is communicated with a gas outlet of a gas supply pipeline, the gas outlet of the gas supply pipeline is also communicated with the gas inlet of the liquid feeding pipe through a pipeline, and control valves are mounted on the liquid feeding pipeline, the gas supply pipeline, the gas leading pipe and the pipeline between the liquid; and pressure gauges are respectively arranged on the gas supply pipeline and the liquid supply pipeline.
Preferably, the lower extreme of downcomer is sealed by lower cover plate, the upper end of downcomer is sealed by the upper cover plate, the shaft hole that supplies the intake pipe to pass is seted up with running through in the middle part of the upper cover plate, the inlet has still been seted up on the upper cover plate, and the inlet and the downcomer inner chamber intercommunication of upper cover plate are passed through to the liquid outlet of upper cover plate.
Preferably, the guide pipe is communicated with the bleed air pipe through a pipe joint, and a round hole for the bleed air pipe to pass through is formed in the upper portion of the upper liquid pipe in a penetrating manner; the top of the upper cover plate extends upwards to form a connecting part, the connecting part of the upper liquid pipe and the upper cover plate is matched in a threaded mode, a sealing ring is arranged between the upper liquid pipe and the connecting part of the upper cover plate, and a water passing hole communicated with the liquid inlet of the upper cover plate and a pipe passing hole for the air inlet pipe to pass through are arranged on the sealing ring in a penetrating mode.
Preferably, the lifting mechanism comprises a winding roller driven by a motor, a steel strand is wound on the winding roller, and one end of the steel strand is fixed on the disc or the liquid feeding pipe after passing through the guide wheel.
Preferably, the steel strand is provided with marks at the preset spacing positions.
Preferably, the expansion pipe is made of rubber materials, and the upper end and the lower end of the expansion pipe are connected to the liquid discharging pipe through fixing buckles.
Preferably, a sealing plug is further connected in the lower liquid pipe, a shaft hole for the air inlet pipe to pass through is formed in the middle of the sealing plug in a penetrating manner, the sealing plug is located below the water outlet hole and close to the water outlet hole, and the diameter of the water outlet hole is 10-30 mm.
Preferably, the expansion pipe includes inflation portion and the installation department of connecting both ends about the inflation portion, the installation department is cylindrically, and under the natural state, its aperture is less than the external diameter of downcomer, the mid portion of inflation portion is cylindrically, the upper and lower two parts of inflation portion all are the round platform shape.
Compared with the prior art, the utility model discloses an implement the effect as follows:
(1) an expansion cavity is formed between the two expansion pipes, the quality condition of the impervious wall can be detected by judging the diffusion speed of liquid in the expansion cavity, the method has low requirement on operation, and the obtained detection result is accurate and reliable.
(2) The expansion pipe positioned at the upper part can isolate injected liquid, so that the interference of soil body permeation at the upper part of the impervious wall on the supply in the drill hole and the overflow of water from the upper part during water injection is eliminated, and the test precision is effectively ensured.
(3) In the test process, the two expansion pipes can be driven to simultaneously perform lifting motion through the lifting mechanism, and the expansion pipes are not required to be released one by one, so that the test efficiency can be improved, and the labor intensity can be reduced. In addition, the two expansion pipes are communicated with the guide pipe in the lower liquid pipe, when the gas supply pipeline conveys high-pressure gas, the high-pressure gas can rapidly enter the expansion cavities of the two expansion pipes, so that the two expansion pipes can be rapidly expanded at the same time, and the test efficiency is further improved.
(4) The disc installed on the liquid feeding pipe can ensure that the whole detection structure can approximately vertically enter the drill hole from the middle part of the drill hole, after high-pressure gas enters the expansion cavity, all parts of the expansion pipe can be uniformly stressed, the expansion pipe is prevented from bursting due to overlarge local pressure, and the service life of the expansion pipe is ensured.
(5) The depth of the expansion cavity can be controlled through the lifting mechanism, so that the quality of the impervious wall can be detected at different depths, and the detection efficiency is high.
Drawings
Fig. 1 is the utility model provides an earth and rockfill dam cut-off wall quality testing structure's schematic structure diagram.
Fig. 2 and 3 are schematic structural diagrams of the detection main body in fig. 1.
Fig. 4 is a schematic structural view of the upper cover plate in fig. 3.
Fig. 5 is a schematic view of the fluid injection mechanism of fig. 1.
Fig. 6 is a schematic structural view of the lifting mechanism of fig. 1.
In the figure: 1. detecting a subject; 11. a liquid discharging pipe; 12. an expansion tube; 13. an expansion chamber; 14. an air inlet pipe; 15. a conduit; 16. a water outlet hole; 17. fixing the buckle; 18. an upper cover plate; 181. a connecting portion; 182. a seal ring; 19. a lower cover plate; 2. a liquid injection mechanism; 21. a liquid feeding pipe; 22. a bleed pipe; 23. a water supply pipeline; 24. a gas supply duct; 25. a disc; 3. a lifting mechanism; 31. a winding roller; 32. a guide wheel; 33. and (4) steel strands.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention.
Referring to fig. 1, the impervious wall quality detection structure of earth and rockfill dam of this embodiment includes: detection main part 1, elevating system 3 and annotate liquid mechanism 2. Referring to fig. 2 and 3, the detection main body 1 includes a liquid outlet pipe 11 and two expansion pipes 12, the upper and lower ends of each expansion pipe 12 are respectively sleeved on the liquid outlet pipe 11 through a fixing buckle 17, the two expansion pipes 12 are arranged on the liquid outlet pipe 11 at high and low positions, an expansion cavity 13 is formed between each expansion pipe 12 and the liquid outlet pipe 11, a plurality of air holes and water outlet holes 16 are formed in the peripheral wall of the liquid outlet pipe 11 in a penetrating manner, the air holes are communicated with the expansion cavities 13, the water outlet holes 16 are located between the two expansion pipes 12, a guide pipe 15 is fixedly installed in the inner cavity of the liquid outlet pipe 11, one end of the guide pipe 15 is communicated with the expansion cavity 13 through the air holes, the other end of the guide pipe is communicated with an air inlet pipe 14, the air inlet pipe 14 is coaxially installed in the inner; the lifting mechanism 3 is used for driving the detection main body 1 to perform lifting movement. Referring to fig. 5, the liquid injection mechanism 2 includes a liquid feeding pipe 21 and a gas introducing pipe 22, a liquid outlet of the liquid feeding pipe 21 is communicated with a liquid inlet of the liquid discharging pipe 11, a liquid inlet of the liquid feeding pipe 21 is communicated with a liquid feeding pipe 23, and an external water source can be injected into the liquid feeding pipe 21 through the liquid feeding pipe 23. The air outlet of the air-entraining pipe 22 is communicated with the air inlet of the air inlet pipe 14 through a pipe joint, the air inlet of the air-entraining pipe 22 is communicated with the air outlet of the air supply pipeline 24, the air outlet of the air supply pipeline 24 is also communicated with the air inlet of the liquid feeding pipe 21 through a pipeline, and control valves are arranged on the air supply pipeline 24, the liquid feeding pipeline 23, the air-entraining pipe 22 and the pipeline between the liquid feeding pipe 21 and the air supply pipeline 24; pressure gauges are arranged on the gas supply pipeline 24 and the liquid supply pipeline 23.
The expansion pipe 12 is made of rubber materials, has good elasticity and can bear large air pressure. After air enters the expansion cavity 13 of the expansion pipe 12 after passing through the air supply pipeline 24, the air guide pipe 22, the air inlet pipe 14 and the conduit 15 in sequence, the expansion pipe 12 gradually expands and finally adheres to the hole wall of the drill hole. The periphery of the upper liquid pipe 21 is provided with external threads, the disc 25 is installed on the upper liquid pipe 21 in a threaded connection mode, and the outer diameter of the disc 25 is slightly smaller than the bore diameter of the drill hole. The entire test structure can be passed approximately vertically into the borehole from the middle of the borehole by means of the disk 25. After the high-pressure gas enters the expansion pipe 12, all parts of the expansion pipe 12 are stressed more uniformly, so that the service life of the expansion pipe 12 is prolonged. The upper and lower pipes 21 and 11 are independent of each other, and a plurality of operators can be arranged to install the disc 25, the expansion pipe 12, and the respective pipes at the same time, thereby contributing to an improvement in the assembling efficiency.
Referring to fig. 2 and 3, the lower liquid pipe 11 is a tubular structure with openings at the upper and lower ends, the lower end of the lower liquid pipe 11 is sealed by a lower cover plate 19, the upper end of the lower liquid pipe 11 is sealed by an upper cover plate 18, a shaft hole for the air inlet pipe 14 to pass through is formed in the middle of the upper cover plate 18 in a penetrating manner, a liquid inlet is further formed in the upper cover plate 18, and a liquid outlet of the upper liquid pipe 21 is communicated with an inner cavity of the lower liquid pipe 11 through the liquid inlet of the upper cover plate. The conduit 15 and the inlet pipe can be welded more easily in the downcomer 11 by this design. The conduit 15 is communicated with the bleed air pipe 22 through a pipe joint, and a circular hole for the bleed air pipe 22 to pass through is formed in the upper portion of the upper liquid pipe 21 in a penetrating manner. Referring to fig. 4, the top of the upper cover plate 18 extends upwards to form a connecting portion 181, the upper liquid pipe 21 is in threaded fit with the connecting portion 181 of the upper cover plate 18, a sealing ring 182 is arranged between the upper liquid pipe and the connecting portion 181 of the upper cover plate 18, and a water passing hole communicated with the liquid inlet of the upper cover plate 18 is penetratingly formed in the sealing ring 182 to allow the air inlet pipe 14 to pass through the water passing hole. Through the design, the upper liquid pipe 21 and the lower liquid pipe 11 can be tightly connected together, and the sealing performance between the pipelines is ensured. Still be connected with the sealing plug (for drawing in the attached drawing) in the downcomer 11, the shaft hole that supplies intake pipe 14 to pass through is seted up with running through in the sealing plug middle part, the sealing plug is located apopore 16 below, and be close to apopore 16. The sealing plug can prevent liquid from accumulating in the liquid outlet pipe 11, and during liquid injection, the liquid is isolated by the sealing plug and directly enters the liquid injection chamber formed by the two expansion pipes 12 after passing through the water outlet hole 16. After the liquid injection, the liquid can smoothly flow out of the liquid dropping pipe 11, and the liquid in the liquid dropping pipe 11 does not need to be poured out manually. The aperture of the water outlet hole 16 is 10-30mm, so that solid impurities can be prevented from entering the liquid outlet pipe 11, and a filtering effect is achieved.
The lifting mechanism 3 comprises a winding roller 31 driven by a motor, a steel strand 33 is wound on the winding roller 31, and one end of the steel strand 33 is fixed on the disc 25 or the upper liquid pipe 21 after passing through a guide wheel 32. When the detection main body 1 needs to be released or lifted up, the winding roller 31 can be driven by the motor to rotate, and the steel strand 33 is released or wound, so that the purpose of driving the detection main body 1 to ascend and descend is achieved. The steel strand 33 is equipped with the mark in predetermined interval position department, can release the predetermined depth of drilling with detecting main part 1 accurately through the mark, and need not carry out the measurement of degree of depth at the measuring tool that independently uses again, and easy operation is convenient.
The expansion pipe 12 is made of rubber materials, the expansion pipe 12 comprises an expansion part and installation parts connected to the upper end and the lower end of the expansion part, the installation parts are cylindrical, and the hole diameter of the installation parts is smaller than the outer diameter of the liquid descending pipe 11 in a natural state. Due to the elasticity of the expansion pipe 12, the mounting part can be clamped on the liquid outlet pipe 11 during installation, and in order to prevent the expansion pipe 12 from axial displacement, the mounting part is installed on the liquid outlet pipe 11 through a fixing buckle 17. The middle part of the expansion part is cylindrical, the upper part and the lower part of the expansion part are both in a circular truncated cone shape, and after high-pressure gas enters the expansion part, the outer wall of the expansion part expands outwards and is tightly attached to the hole wall of the drilled hole, so that the sealing effect is achieved.
Use earth and rockfill dam cut-off wall quality testing structure carry out quality testing's method to the cut-off wall including following step:
(1) according to design requirements, determining the drilling depth at a designated impervious wall test hole site;
(2) drilling at a test hole position, wherein the hole diameter is generally over 75 mm;
(3) after the quality detection structure of the earth and rockfill dam impervious wall is assembled, the detection main body 1 and the liquid injection mechanism 2 are put into a drill hole, and the putting depth of the detection main body 1 is controlled through the lifting mechanism 3;
(4) high-pressure gas is conveyed into a gas supply pipeline 24, the high-pressure gas sequentially passes through the gas supply pipeline 24, a gas guide pipe 22, a gas inlet pipe 14 and a guide pipe 15 to enter an expansion pipe 12, and the expansion pipe 12 gradually expands until the expansion pipe is attached to the hole wall of a drilled hole; observing the reading of a pressure gauge on the gas supply pipeline 24, and stopping gas supply after a preset value is reached;
(5) liquid is conveyed into the liquid supply pipeline 23, enters the lower liquid pipe 11 through the liquid supply pipeline 23 and the upper liquid pipe 21 in sequence, and is ejected out through a water outlet hole 16 formed in the lower liquid pipe 11 until a test cavity formed between the two expansion pipes 12 is filled;
(6) opening a control valve between the gas supply pipeline 24 and the upper liquid pipe 21, closing the control valve on the gas guide pipe 22, delivering high-pressure gas into the gas supply pipeline 24 again, directly feeding the high-pressure gas into the upper liquid pipe 21 after the high-pressure gas passes through the gas supply pipeline 24, observing the reading of a pressure gauge on the liquid supply pipeline 23, stopping gas delivery after a preset value is reached, and closing the control valve between the gas supply pipeline 24 and the upper liquid pipe 21;
(7) and after waiting for a preset time, counting the reading of the pressure gauge on the liquid supply pipeline 23, and processing the reading to obtain a detection result.
In step 7, the reading of the pressure gauge on the liquid supply pipe 23 may be compared with a normal pressure range value, where the normal pressure range value is an empirical value obtained after a plurality of tests are performed on the diaphragm wall with good quality, and if there is significant fluctuation, it indicates that the diaphragm wall has a defect at the depth, otherwise, the diaphragm wall has good quality.
After one-time detection is finished, all the control valves can be opened, then the detection main body 1 is moved upwards for a preset distance, and then the steps 4-7 are repeated, so that the quality detection of the impervious walls at different depths can be realized.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (8)
1. The utility model provides an earth and rockfill dam cut-off wall quality testing structure which characterized in that includes: the device comprises a detection main body, a lifting mechanism and a liquid injection mechanism; the detection main body comprises a liquid discharge pipe and two expansion pipes, the expansion pipes are sleeved on the periphery of the liquid discharge pipe, the two expansion pipes are arranged on the liquid discharge pipe in a high-low position, an expansion cavity is formed between each expansion pipe and the liquid discharge pipe, a plurality of air holes and water outlet holes are formed in the peripheral wall of the liquid discharge pipe in a penetrating mode, the air holes are communicated with the expansion cavities, the water outlet holes are located between the two expansion pipes, a guide pipe is fixedly installed in the inner cavity of the liquid discharge pipe, one end of the guide pipe is communicated with the expansion cavities through the air holes, the other end of the guide pipe is communicated with an air inlet pipe, the air inlet pipe is coaxially installed in the inner cavity of the; the lifting mechanism is used for driving the detection main body to perform lifting motion; the liquid injection mechanism comprises a liquid feeding pipe and a gas leading pipe, a liquid outlet of the liquid feeding pipe is communicated with a liquid inlet of the liquid discharging pipe, the liquid inlet of the liquid feeding pipe is communicated with a liquid feeding pipeline, a disc is sleeved on the periphery of the liquid feeding pipe, a gas outlet of the gas leading pipe is communicated with a gas inlet of a gas inlet pipe, the gas inlet of the gas leading pipe is communicated with a gas outlet of a gas supply pipeline, the gas outlet of the gas supply pipeline is also communicated with the gas inlet of the liquid feeding pipe through a pipeline, and control valves are mounted on the liquid feeding pipeline, the gas supply pipeline, the gas leading pipe and the pipeline between the liquid; and pressure gauges are respectively arranged on the gas supply pipeline and the liquid supply pipeline.
2. The structure of claim 1, wherein the lower tube is a tubular structure with an upper end and a lower end open, the lower end of the lower tube is closed by a lower cover plate, the upper end of the lower tube is closed by an upper cover plate, a shaft hole for an air inlet tube to pass through is formed in the middle of the upper cover plate in a penetrating manner, the upper cover plate is further provided with a liquid inlet, and the liquid outlet of the upper tube is communicated with the inner cavity of the lower tube through the liquid inlet of the upper cover plate.
3. The structure for detecting the quality of the impervious wall of the earth and rockfill dam as claimed in claim 2, wherein the conduit is communicated with the air-entraining pipe through a pipe joint, and a round hole for the air-entraining pipe to pass through is formed in the upper part of the upper liquid pipe in a penetrating manner; the top of the upper cover plate extends upwards to form a connecting part, the connecting part of the upper liquid feeding pipe and the upper cover plate is matched in a threaded mode, a sealing ring is arranged between the upper liquid feeding pipe and the connecting part of the upper cover plate, a water passing hole communicated with the liquid inlet of the upper cover plate is arranged on the sealing ring in a penetrating mode, and a pipe hole is formed in the air inlet pipe.
4. The structure of claim 1, wherein the elevating mechanism comprises a winding roller driven by a motor, the winding roller is wound with a steel strand, and one end of the steel strand is fixed on the disc or the liquid feeding pipe after passing through the guide wheel.
5. The structure of claim 4, wherein the predetermined spacing positions of the steel strands are marked.
6. The structure of claim 1, wherein the expansion tube is made of rubber, and both the upper end and the lower end of the expansion tube are connected to the liquid outlet tube through fixing buckles.
7. The structure of claim 1, wherein a sealing plug is further connected to the liquid outlet pipe, a shaft hole for an air inlet pipe to pass through is formed in the middle of the sealing plug in a penetrating manner, the sealing plug is located below the water outlet hole and close to the water outlet hole, and the diameter of the water outlet hole is 10-30 mm.
8. The earth and rock dam cut-off wall quality detection structure of claim 6, characterized in that, the inflation pipe includes inflation portion and the installation department of connection both ends about the inflation portion, the installation department is cylindrical, under the natural state, its aperture is less than the external diameter of downcomer, the mid portion of inflation portion is cylindrical, the upper and lower two parts of inflation portion all are the round platform shape.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921592652.3U CN210464836U (en) | 2019-09-24 | 2019-09-24 | Earth-rock dam cut-off wall quality detection structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921592652.3U CN210464836U (en) | 2019-09-24 | 2019-09-24 | Earth-rock dam cut-off wall quality detection structure |
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| CN210464836U true CN210464836U (en) | 2020-05-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109632577A (en) * | 2019-02-20 | 2019-04-16 | 自然资源部第海洋研究所 | A kind of cut-pff wall defective locations detection device and detection method |
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2019
- 2019-09-24 CN CN201921592652.3U patent/CN210464836U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109632577A (en) * | 2019-02-20 | 2019-04-16 | 自然资源部第海洋研究所 | A kind of cut-pff wall defective locations detection device and detection method |
| CN109632577B (en) * | 2019-02-20 | 2021-07-16 | 自然资源部第一海洋研究所 | Impervious wall defect position detection device and detection method |
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