CN211228434U - Deep device of burying underground of soft soil area pore water pressure gauge - Google Patents
Deep device of burying underground of soft soil area pore water pressure gauge Download PDFInfo
- Publication number
- CN211228434U CN211228434U CN201921528540.1U CN201921528540U CN211228434U CN 211228434 U CN211228434 U CN 211228434U CN 201921528540 U CN201921528540 U CN 201921528540U CN 211228434 U CN211228434 U CN 211228434U
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- Prior art keywords
- water pressure
- pressure gauge
- sleeve
- pore water
- soil
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 72
- 239000002689 soil Substances 0.000 title claims abstract description 71
- 239000011148 porous material Substances 0.000 title claims abstract description 63
- 238000005056 compaction Methods 0.000 claims abstract description 30
- 239000000463 material Substances 0.000 claims abstract description 26
- 230000008054 signal transmission Effects 0.000 claims abstract description 15
- 239000003566 sealing material Substances 0.000 claims description 22
- 239000004576 sand Substances 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 9
- 239000004033 plastic Substances 0.000 claims description 6
- 229910000278 bentonite Inorganic materials 0.000 claims description 5
- 239000000440 bentonite Substances 0.000 claims description 5
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 5
- 238000005553 drilling Methods 0.000 claims description 5
- 239000000314 lubricant Substances 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 10
- 238000007789 sealing Methods 0.000 abstract description 10
- 230000004083 survival effect Effects 0.000 abstract description 3
- 230000008859 change Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000007596 consolidation process Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 235000014121 butter Nutrition 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000002706 hydrostatic effect Effects 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 229940099259 vaseline Drugs 0.000 description 1
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The utility model relates to a device is buried underground deeply to weak soil area pore water pressure gauge. The device comprises an outer pipe, a sleeve, a compaction device, a soil extruder, a cylindrical connecting rod and a compaction device handle; the outer pipe is connected with the soil extruder in a hitching mode; the sleeve and the outer pipe are coaxially sleeved; a plurality of vertical guide grooves are uniformly arranged on the inner wall of the sleeve along the circumferential direction, a wire protection tube is also arranged on the inner wall of the sleeve, and a plurality of pore water pressure gauges are embedded in the water permeable material; the pore water pressure gauge is connected with a signal transmission line, and the compaction device is provided with a plurality of limiting blocks and lead preformed holes; the limiting block is buckled in the guide groove of the sleeve. The utility model discloses bury method underground includes following step: pore forming, pore bottom sealing treatment, pore water pressure gauge embedding, pore sealing, pore water pressure gauge embedding repeatedly, pore sealing, and data acquisition and analysis. The utility model discloses the device is simple, low cost, convenient operation, and it is high to bury the pore water pressure gauge survival rate underground in the field, and the location is accurate, and the hole sealing is of high quality, data are reliable.
Description
Technical Field
The utility model relates to a device is buried underground deeply to weak soil area hole hydrostatic meter belongs to civil engineering technical field.
Background
In the field of civil engineering, the stress, consolidation degree and foundation treatment effect of a soil body are researched by measuring or monitoring the change condition of pore water pressure in the soil body frequently. The pore water pressure value is important data of scientific research and engineering projects, and particularly relates to the aspects of research on stress distribution and change rules between soil and structures, consolidation and settlement calculation in foundation treatment, stress monitoring of foundation pit enclosure and the like. The pore water pressure gauge is an instrument for measuring the change condition of the pore water pressure of the stratum within a certain area and depth range under different construction conditions, so as to obtain the stress change condition of the required soil layer section. The pore water pressure values of different depths of the foundation soil layer can be obtained by embedding pore water pressure meters at different positions of the soil layer for testing. When embedding, embedding is generally performed by drilling. However, because the soft soil foundation is soft and weak, the shrinkage is easy to generate during pore forming, and the slurry adopting the slurry retaining wall can generate the floating force on the pore water pressure gauge and the signal transmission cable thereof; meanwhile, the field working environment is severe, the embedding method of the pore water pressure gauge is not standard, so that the problems of complicated installation and embedding process of the pore water pressure gauge, high embedding cost, low survival rate, poor hole sealing quality, inaccurate embedding position and the like are caused, the measured data cannot truly reflect the actual pore water pressure of the measured soil layer, and the reliability is difficult to guarantee. All these problems directly affect the accuracy and reliability of the monitored data, and even cause erroneous judgment and evaluation.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a deep device of burying underground of weak soil area pore water pressure gauge and method of burying underground to the problem that exists when present pore water pressure gauge buries underground. The utility model discloses except that can realize the deep burying underground, still have and hit real and hole sealing function.
The utility model adopts the technical proposal that:
a deep layer embedding device for a pore water pressure gauge in a soft soil area comprises an outer pipe, a sleeve, a compactor, a soil squeezer, a cylindrical connecting rod and a compactor handle;
the outer pipe is connected with the soil extruder in a manner of hitching; the outer pipe is used for protecting the wall so as to prevent hole collapse or diameter reduction; the soil squeezer is used for squeezing soil to form a vertical drill hole; hole sealing materials and water permeable materials are filled in the vertical drill holes;
the sleeve and the outer pipe are coaxially sleeved, and the interiors of the sleeve and the outer pipe are hollow; a plurality of vertical guide grooves are uniformly formed in the inner wall of the sleeve along the circumferential direction, and a wire protection tube is further arranged on the inner wall of the sleeve;
a pore water pressure gauge is embedded in the water permeable material; the pore water pressure gauge is connected with a signal transmission line, and the lead protection tube is used for protecting the signal transmission line;
the compaction device is provided with a plurality of limiting blocks and lead preformed holes; the limiting block is buckled in the guide groove of the sleeve, so that the compaction device is ensured to move in the sleeve as piston motion; the lead wire preformed hole is used for the signal transmission line to pass through and finally extends to the ground;
the columnar connecting rod is used for connecting the compaction device and the compaction device handle, and the compaction device handle is tubular or in other shapes convenient for force application and used for applying force to the compaction device, so that the hole sealing material and the water permeable material are compacted.
In the above technical solution, further, the outer tube is made of metal, the sleeve is made of metal or plastic, and the outer tube and the sleeve are connected by screw threads.
Furthermore, the soil extruder is a conical soil extruder made of PVC plastic or metal, and the soil extruder is filled with materials such as cohesive soil and the like to enable the gravity of the soil extruder to be equal to or close to that of a field soil body, so that the settlement generated by the soil extruder can be ignored.
Further, the hole sealing material and the water permeable material are poured into the outer pipe through the upper part of the outer pipe.
Furthermore, the upper end of the cylindrical long rod is connected with a compactor handle through threads; the lower end of the cylindrical long rod is connected with a compaction device through threads. The length of the cylindrical long rod can enable the compaction device to reach the set depth by connecting a plurality of cylindrical connecting rods.
Furthermore, in order to facilitate the falling-off of the soil extruder and the outer pipe when the outer pipe is lifted, the contact parts of the outer pipe, the soil extruder and the outer pipe and the sleeve can be coated with lubricating agents such as vaseline, butter and the like.
Furthermore, the hole sealing material adopts cohesive soil or bentonite.
Further, the water permeable material can adopt medium sand or fine sand.
The utility model also provides a soft soil area pore water pressure gauge buries method underground, and this method is realized based on above-mentioned device, buries the step as follows underground:
step 1: and (6) forming holes. The soil extruder and the outer pipe are in place at the designated positions, then the outer pipe and the soil extruder are pushed by equipment such as a field excavator and the like, soft soil around the soil extruder is squeezed, and the soil extruder is pushed to a preset depth to form a vertical drilling hole. The outer pipe is used for protecting the wall so as to avoid the phenomenon of reducing or collapsing the hole.
Step 2: and (5) sealing the bottom of the hole. Pouring a certain amount of hole sealing materials such as cohesive soil or bentonite into the outer pipe, lifting the outer pipe to a certain height (more than 10cm), and compacting the hole sealing materials by using a compactor.
And step 3: and embedding a pore water pressure gauge. Pouring a certain amount of permeable materials such as medium sand or fine sand into the outer pipe, lifting the outer pipe, compacting to a compactness of more than 90% (the embedding depth of the 1 st pore water pressure gauge) by using a compactor, and placing the pore water pressure gauge and the lead protection pipe into the sleeve. And vertically hoisting the casing pipe, and vertically putting down the casing pipe towards the outer pipe to the embedding depth of the pore water pressure gauge.
And 4, step 4: and (5) hole sealing treatment. Pouring a certain amount of water-permeable material into the sleeve, lifting the sleeve to a certain height (the lifting height is the thickness of the water-permeable material), and compacting to a compactness of more than 90% by using a compactor. Pouring a certain amount of hole sealing material and water permeable material into the casing pipe in sequence, lifting the outer pipe and the casing pipe, and compacting the outer pipe and the casing pipe in sequence by using a compacting device to achieve the compactness of more than 90%. The hole sealing material is filled to a specified depth (namely the embedding depth of the next pore water pressure gauge).
And 5: and repeatedly embedding the pore water pressure gauge. And (4) removing the sleeve, repeating the steps 3 and 4 for multiple times as required, and burying the pore water pressure meters 2, 3 and the like.
Step 6: an initial reading is taken. After the pore water pressure gauge is embedded, the sleeve and the outer pipe are removed, and hole sealing materials are filled into the drilled hole and are compacted to the ground surface. After the operation is finished, the plug of each pore water pressure gauge signal transmission line is connected to a frequency instrument, and initial data of the pore water pressure gauges are read.
In the above technical solution, further, the lifting height of the outer tube 1 or the sleeve 2 is equal to the height of the sealing material or the water permeable material in the outer tube 1 or the sleeve 2, and the height of the sealing material is greater than 10 cm.
The utility model has the advantages that:
the utility model discloses the device is simple, repeatedly usable, convenient to use. Drilling is not needed, and the installation cost is saved. The embedding depth of the pore water pressure gauge can be well controlled in the embedding process, the embedding depth is not limited, the positioning is accurate, and the hole sealing quality is good. In addition, the signal transmission line of the pore water pressure gauge is protected by the wire protection tube in the embedding process, so that the signal transmission line is not easy to damage and has high survival rate. The test data is real and accurate, and the regularity and the correlation are good.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a big picture of the soil extruder of the utility model.
Fig. 3 is a schematic cross-sectional view of the sleeve of the present invention.
Fig. 4 is a big picture of the handle of the compaction device of the utility model.
Fig. 5 is a schematic view of the compaction device of the present invention.
Fig. 6 is a large sample diagram of the pore water pressure gauge of the present invention.
Fig. 7 is a big sample of the single-section cylindrical connecting rod of the present invention.
Fig. 8 is a schematic view of the signal transmission line protection tube of the present invention.
Fig. 9 is a flow chart of the pore water pressure gauge embedding process of the present invention.
Detailed Description
The invention will be further described with reference to the accompanying drawings and specific embodiments.
A deep burying device for a pore water pressure gauge in a soft soil area comprises an outer pipe 1, a sleeve 2, a compaction device 4, a soil squeezing device 6, a cylindrical connecting rod 7 and a compaction device handle 8. The outer tube 1, the compaction device 4, the cylindrical connecting rod 7 and the compaction device handle 8 are all made of metal, and the outer tube 1 is coaxially sleeved outside the sleeve 2; the bottom of the outer pipe 1 is connected with a soil extruder 6; the upper end and the lower end of the cylindrical connecting rod 7 are respectively connected with the compaction device handle 8 and the compaction device 4 by threads; the sleeve 2 is made of metal or PVC plastic; the compaction device 4 is provided with a limiting block 11 and a lead preformed hole 10. A guide groove 12 is provided in the sleeve 2. The inner wall of the sleeve 2 is also provided with a lead protection tube 9, and the water permeable material is embedded with a pore water pressure gauge 5. The pore water pressure gauge 5 is connected with a signal transmission line 3.
In the device, the outer pipe 1 is in threaded connection with the sleeve 2; the soil extruder 6 is connected with the outer pipe 1 in a hitching mode. The soil extruder 6 is a conical soil extruder made of PVC plastic or metal, and materials with the weight equal to or close to that of the soil body of the field are filled in the soil extruder. The outer pipe 1 and the soil extruder 6 are in place at the designated positions, the outer pipe 1 and the soil extruder 6 are pushed by the external force of the excavator and the bulldozer, soft soil around the soil extruder is squeezed, and the soil extruder is pushed to a preset depth to form a vertical drilling hole. And hole sealing materials and water permeable materials are filled in the vertical drill holes. The hole sealing material and the water permeable material are poured in from the upper part of the outer pipe 1. The length of the cylindrical connecting rod 7 is adjustable, and the cylindrical connecting rods can be connected with one another through the cylindrical connecting rods. The contact parts between the outer pipe 1 and the soil extruder 6 and between the outer pipe 1 and the sleeve 2 are coated with lubricant. The hole sealing material adopts cohesive soil or bentonite, and the water permeable material adopts medium sand or fine sand.
The embedding method of the pore water pressure gauge in the soft soil area comprises the following steps: pouring a certain amount of hole sealing materials such as cohesive soil or bentonite into the outer pipe 1, lifting the outer pipe 1 to a certain height (the thickness of the hole sealing layer is generally more than 10cm), and compacting the hole sealing materials by using a compactor 4;
then, pouring a certain amount of permeable materials such as medium sand or fine sand into the outer pipe 1, and compacting to a compactness of more than 90% by using a compactor 4 (at the moment, the depth of the hole bottom is the embedding depth of the 1 st pore water pressure gauge); the pore water pressure gauge 5 and the lead protection tube 9 are arranged in the sleeve 2, and the pore water pressure gauge signal transmission line 3 penetrates through the lead protection tube 9. The casing 2 is vertically hoisted and vertically lowered into the outer pipe 1 to a predetermined depth.
Pouring a certain amount of water-permeable material into the sleeve 2, lifting the outer pipe 1 and the sleeve 2 to a certain height (the lifting height is the thickness of the water-permeable material), and compacting to a compactness of more than 90% by using a compactor 4. Pouring a certain amount of hole sealing materials and water permeable materials into the sleeve 2 in sequence, lifting the outer pipe 1 and the sleeve 2 to a certain height (the lifting height is the thickness of the hole sealing materials), and compacting to a certain compactness (more than 90%) by using a compactor 4.
The sleeve 2 is removed. And (4) repeating the steps as required, and burying pore water pressure gauges such as 2 nd and 3 rd.
After the pore water pressure gauge (5) is buried, the casing 2 and the outer pipe 1 are removed, and hole sealing materials are filled into the drilled hole and are compacted to the ground surface. After completion, the plug of each pore pressure gauge signal transmission line 3 was connected to a frequency meter (not shown), and the initial data of the pore pressure gauge was read.
The embodiments described in this specification are merely illustrative of implementations of the inventive concepts, and the scope of the invention should not be considered limited to the specific forms set forth in the embodiments, but rather the scope of the invention includes equivalent technical means that can be conceived by those skilled in the art based on the inventive concepts.
Claims (7)
1. The utility model provides a device is buried underground in soft soil area pore water pressure gauge deep layer which characterized in that: comprises an outer pipe (1), a sleeve (2), a compaction device (4), a soil squeezing device (6), a cylindrical connecting rod (7) and a compaction device handle (8);
the outer pipe (1) is connected with the soil extruder (6) in a hitching mode; the outer pipe (1) is used for protecting the wall to prevent hole collapse or diameter reduction; the soil extruder (6) is used for extruding soil to form a vertical drilling hole; hole sealing materials and water permeable materials are filled in the vertical drill holes;
the sleeve (2) and the outer tube (1) are coaxially sleeved, and the interiors of the sleeve and the outer tube are hollow; a plurality of vertical guide grooves (12) are uniformly formed in the inner wall of the sleeve (2) along the circumferential direction, and a wire protection tube (9) is further arranged on the inner wall of the sleeve (2);
a pore water pressure gauge (5) is embedded in the water permeable material; the pore water pressure gauge (5) is connected with a signal transmission line (3), and the lead protection tube (9) is used for protecting the signal transmission line (3);
the compaction device (4) is provided with a plurality of limiting blocks (11) and lead preformed holes (10); the limiting block (11) is buckled in a guide groove (12) of the sleeve (2) to ensure that the compaction device (4) moves in the sleeve (2) as a piston; the lead preformed hole (10) is used for the signal transmission line (3) to pass through;
the columnar connecting rod (7) is used for connecting the compaction device (4) and the compaction device handle (8), and the compaction device handle (8) is used for applying force to the compaction device (4) so as to compact the hole sealing material and the water permeable material.
2. The deep burying device of the pore water pressure gauge in the soft soil area according to claim 1, characterized in that: the outer pipe (1) is made of metal, the sleeve (2) is made of metal or plastic, and the outer pipe (1) is in threaded connection with the sleeve (2).
3. The deep burying device of the pore water pressure gauge in the soft soil area according to claim 1, characterized in that: the soil extruder (6) is a conical soil extruder, is made of PVC plastic or metal, and is filled with a material with the weight equal to or close to that of a field soil body.
4. The deep burying device of the pore water pressure gauge in the soft soil area according to claim 1, characterized in that: the upper end of the cylindrical connecting rod (7) is connected with a compaction device handle (8) through threads, and the lower end of the cylindrical connecting rod is connected with a compaction device (4) through threads; the length of the cylindrical connecting rods (7) is adjustable, and the cylindrical connecting rods are connected with one another.
5. The deep burying device of the pore water pressure gauge in the soft soil area according to claim 1, characterized in that: and a lubricant is coated between the outer pipe (1) and the soil extruder (6) and at the contact part of the outer pipe (1) and the sleeve (2).
6. The deep burying device of the pore water pressure gauge in the soft soil area according to claim 1, characterized in that: the hole sealing material adopts cohesive soil or bentonite.
7. The deep burying device of the pore water pressure gauge in the soft soil area according to claim 1, characterized in that: the permeable material is medium sand or fine sand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921528540.1U CN211228434U (en) | 2019-09-12 | 2019-09-12 | Deep device of burying underground of soft soil area pore water pressure gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921528540.1U CN211228434U (en) | 2019-09-12 | 2019-09-12 | Deep device of burying underground of soft soil area pore water pressure gauge |
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| Publication Number | Publication Date |
|---|---|
| CN211228434U true CN211228434U (en) | 2020-08-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921528540.1U Expired - Fee Related CN211228434U (en) | 2019-09-12 | 2019-09-12 | Deep device of burying underground of soft soil area pore water pressure gauge |
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| CN (1) | CN211228434U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110485401A (en) * | 2019-09-12 | 2019-11-22 | 浙江建设职业技术学院 | A kind of soft clay area deep embedding device for pore pressure gauge and its method for embedding |
-
2019
- 2019-09-12 CN CN201921528540.1U patent/CN211228434U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110485401A (en) * | 2019-09-12 | 2019-11-22 | 浙江建设职业技术学院 | A kind of soft clay area deep embedding device for pore pressure gauge and its method for embedding |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200811 |
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| CF01 | Termination of patent right due to non-payment of annual fee |