CN211898292U - Lateral soil pressure cell embedding and positioning device - Google Patents
Lateral soil pressure cell embedding and positioning device Download PDFInfo
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- CN211898292U CN211898292U CN202020492766.7U CN202020492766U CN211898292U CN 211898292 U CN211898292 U CN 211898292U CN 202020492766 U CN202020492766 U CN 202020492766U CN 211898292 U CN211898292 U CN 211898292U
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- soil pressure
- pvc pipe
- steel bar
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- pressure cell
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- 239000002689 soil Substances 0.000 title claims abstract description 144
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 44
- 239000010959 steel Substances 0.000 claims abstract description 44
- 238000012544 monitoring process Methods 0.000 claims abstract description 21
- 238000009434 installation Methods 0.000 claims abstract description 17
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 15
- 238000005553 drilling Methods 0.000 abstract description 12
- 239000004576 sand Substances 0.000 description 5
- 238000005259 measurement Methods 0.000 description 4
- 239000002390 adhesive tape Substances 0.000 description 2
- 238000007596 consolidation process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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Abstract
The utility model discloses a lateral soil pressure box embedding and positioning device, which comprises a data collector, a soil pressure sensor, a sensor wire, a fixed steel bar, a PVC pipe and a PVC pipe joint; the PVC pipe comprises a plurality of sections, each section is provided with an arc-shaped notch vertical to the length direction of the pipe, and the soil pressure box is embedded into the arc-shaped notch on the PVC pipe and fixed by a fixed steel bar; the PVC pipes are connected into a long pipe through PVC pipe joints and buried in a drill hole at a road surface monitoring point; the sensor wire is positioned in the PVC pipe, one end of the sensor wire is connected with the soil pressure sensor, and the other end of the sensor wire extends out of the PVC pipe and is connected with a data acquisition unit on the ground. The utility model provides a soil pressure cell back can't arouse the big problem of monitoring error with roadbed soil direct contact when current drilling method installation soil pressure cell, also solved the problem that the installation is complicated and the wire is drawn forth, improved soil pressure monitoring precision, the installation is simple, easily field operation.
Description
Technical Field
The utility model belongs to the technical field of road engineering on-the-spot monitoring, involve the measurement technique of soil pressure value, concretely relates to side direction soil pressure cell buries positioner underground.
Background
In the field monitoring content of road engineering, the soil pressure value of foundation soil is an important index, the soil pressure value is important for evaluating the reliability and stability of a roadbed, and the lateral soil pressure more directly reflects the acting force of the roadbed on a retaining wall. The soil pressure value is usually measured by using an embedded vibrating wire type soil pressure cell, and the direction in which the front of the embedded soil pressure cell is aligned is the soil pressure value in the target measurement direction.
In the prior art, the existing method for burying the soil pressure box mainly comprises a layered burying method and a drilling installation method, wherein the layered burying method is commonly applied in practical engineering, and mainly comprises the step of burying the soil pressure box in layers in the roadbed backfilling process, namely installing and backfilling the upper layer on the top surface of each layer of backfilled soil. The drilling installation method mainly measures the foundation soil pressure of the road surface of the vehicle, the earth surface is drilled by the exploration drill, the earth pressure box is embedded after the earth is drilled to the depth required to be measured, and then the drilled hole is backfilled, so that the earth pressure at different depths can be measured.
The main problems and deficiencies in the prior art include:
the layered burying method cannot monitor the internal stress of the roadbed soil of the road with the traffic; when the number of the buried soil pressure boxes is large, the time for burying is long, more lines are led out, and the progress of the project can be delayed; the height of each layer of backfill soil is determined, the measuring depth is limited, and the soil pressure value of the soil body with any depth cannot be measured.
At present, in actual engineering, the application of burying soil pressure boxes through drilling holes is less, and the restriction factors during burying are more, but partial researches on burying horizontal soil pressure boxes through drilling holes have been carried out. The invention discloses a sensor for monitoring lateral soil pressure value in the field of building engineering, and discloses a method for embedding lateral soil pressure, wherein the sensor is designed in Chinese invention patent with the application number of '200810041666.6' and the name of 'method and device for embedding lateral soil pressure sensor in soil body', the method for embedding lateral soil pressure is described, the target embedding depth is achieved by adopting the connection of a plurality of sections of PVC pipes, slotted holes are formed in the PVC pipes, and soil pressure boxes are installed in the slotted holes and fixed. However, the lateral soil pressure cell embedded by adopting the method has the following defects: the orientation of the front face of the soil pressure cell cannot be accurately positioned, so that the soil pressure value in the target direction cannot be accurately measured; the soil pressure cell is partly embedded in the PVC pipe, and the back of the soil pressure cell is in direct contact with the PVC pipe, but not in contact with the actual measurement soil layer, which can cause a large error of the measurement result.
Therefore, although the earth pressure value can be monitored by drilling for a road on which traffic has passed, an accurate result cannot be obtained. In order to achieve the monitoring purpose, it is necessary to design a burying instrument capable of accurately measuring the lateral soil pressure value.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned problem that exists among the prior art and not enough, the utility model provides a positioner is buried underground to side direction soil pressure cell has solved the unable problem that causes monitoring error big with roadbed soil direct contact in soil pressure cell back when current drilling method installation soil pressure cell, has also solved the problem that the installation is complicated and the wire is drawn forth, has improved soil pressure monitoring precision, and the installation is simple, easily field operation.
Therefore, the utility model adopts the following technical scheme:
a lateral soil pressure cell embedding and positioning device comprises a data collector, a soil pressure sensor, a sensor wire, a fixed steel bar, a PVC pipe and a PVC pipe joint; the soil pressure sensor is positioned in the soil pressure box and used for measuring soil pressure; the PVC pipe comprises a plurality of sections, each section is provided with an arc-shaped notch vertical to the length direction of the pipe, and the soil pressure box is embedded into the arc-shaped notch on the PVC pipe and fixed through a fixed steel bar; the PVC pipes are connected into a long pipe through PVC pipe joints and buried in a drill hole at a road surface monitoring point; the sensor wire is positioned in the PVC pipe, one end of the sensor wire is connected with the soil pressure sensor, and the other end of the sensor wire extends out of the PVC pipe and is connected with a data acquisition unit on the ground.
Preferably, the fixed steel bar is a flat steel bar, the width of the flat steel bar is equal to the height of the soil pressure cell, the length of the flat steel bar is greater than half of the perimeter of the soil pressure cell, and threaded nails are welded at two ends of the flat steel bar.
Furthermore, the fixed steel bar is fixed on the PVC pipe through a fixed screw; the fixing screw is matched with the screw thread nails at the two ends of the fixing steel bar to fix the soil pressure cell.
Furthermore, a rubber pad is arranged between the fixed steel bar and the soil pressure box and used for preventing the soil pressure box from being sent.
Preferably, a positioning red line is arranged outside the pipe of the PVC pipe, and the positioning red line is positioned outside the pipe joint of each section of PVC pipe and used for ensuring the alignment of the positions during connection.
Preferably, the soil pressure sensor is a vibrating wire soil pressure sensor, and the soil pressure box is a vibrating wire soil pressure box.
Preferably, the data collector is a 609 frequency meter matched with the vibrating wire type soil pressure cell and used for collecting a frequency change value and converting the frequency change value into a soil pressure value.
Preferably, the sensor wires comprise two black and red wires, and two ends of the two black and red wires are respectively connected with the soil pressure sensor and the data acquisition unit to form a loop.
Preferably, the length of the PVC pipe is determined according to the requirement for monitoring the pressure values of soil at different depths, and the slotting depth of the arc-shaped groove on the PVC pipe is determined according to the size and the depth of a field drilled hole.
Preferably, the length of the PVC pipe joint is 25-30cm, the inner diameter of the PVC pipe joint is consistent with the outer diameter of the PVC pipe, and a circle of protruding part is arranged at the middle section of the interior of the PVC pipe joint and used for facilitating the installation of the upper PVC pipe and the lower PVC pipe in the middle position.
Compared with the prior art, the beneficial effects of the utility model are that:
(1) each section of PVC pipe and each joint are provided with a vertical red line mark, and the red lines of each section of PVC pipe and each joint are aligned during splicing, so that the orientation of the soil pressure cell can be ensured through the ground surface.
(2) The PVC pipe is provided with the concave arc-shaped groove, the side surface of the soil pressure box is contacted with the arc-shaped groove, and the problems that when the side surface of the soil pressure box is connected with the PVC pipe which is not grooved, the whole width is too large and the soil pressure box is difficult to embed a small drill hole, but the large survey drill hole has large engineering quantity and can influence the normal traffic of a road surface and the monitoring precision are solved.
(3) Adopt a special billet that just has the elasticity screw to fix soil pressure cell on the PVC pipe, fixed billet can also effectively prevent PVC pipe notch fracture to place the rubber pad on billet and soil pressure cell contact surface and prevent not hard up.
(4) The middle section in the PVC pipe joint is provided with a protruding part, so that the equal tail ends of the upper section and the lower section can be embedded into the joint when the PVC pipe is spliced, and the PVC pipe is tightly wound by using an adhesive tape to prevent falling.
(5) The problem of current drilling method when installation soil pressure cell the soil pressure cell back can't cause monitoring error big with road bed soil direct contact, improved soil pressure monitoring precision, also solved the problem that the installation is complicated and the wire is drawn forth.
(6) The installation is simple, easily field operation.
Drawings
Fig. 1 is a schematic structural diagram of a lateral earth pressure cell embedding and positioning device provided by the present invention.
Fig. 2 is a detailed view of a soil pressure sensor in the lateral soil pressure cell embedding and positioning device provided by the present invention.
Fig. 3 is a schematic structural view of a fixed steel bar in the lateral soil pressure cell embedding and positioning device provided by the present invention.
Fig. 4 is a schematic view of the connection relationship between the sleeves in the lateral soil pressure cell embedding and positioning device provided by the present invention.
Description of reference numerals: 1. a data acquisition unit; 2. a soil pressure sensor; 3. a sensor wire; 4. fixing the steel bar; 5. PVC pipes; 6. PVC pipe joints; 7. fixing screws; 8. a rubber pad; 9. the red line is located.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments, which are only used for explaining the present invention, but not for limiting the present invention.
As shown in fig. 1, the utility model discloses a lateral soil pressure cell embedding and positioning device, which comprises a data collector 1, a soil pressure sensor 2, a sensor wire 3, a fixed steel bar 4, a PVC pipe 5 and a PVC pipe joint 6; the soil pressure sensor 2 is positioned in the soil pressure box and used for measuring soil pressure; the PVC pipe 5 comprises a plurality of sections, each section is provided with an arc-shaped notch vertical to the length direction of the pipe, and the soil pressure box is embedded into the arc-shaped notch on the PVC pipe 5 and fixed through a fixing steel bar 4; the PVC pipes 5 are connected into a long pipe through PVC pipe joints 6 and buried in a drill hole at a road surface monitoring point; the sensor wire 3 is positioned in the PVC pipe 5, one end of the sensor wire 3 is connected with the soil pressure sensor 2, and the other end of the sensor wire extends out of the PVC pipe 5 and is connected with the data acquisition unit 1 on the ground.
Specifically, as shown in fig. 2 and 3, the fixing steel bar 4 is a flat steel bar, the width of the flat steel bar is equal to the height of the soil pressure cell, the length of the flat steel bar is greater than half of the circumference of the soil pressure cell, and threaded nails are welded at two ends of the flat steel bar.
The fixed steel bar 4 is fixed on the PVC pipe 5 through a fixed screw 7; the fixing screw 7 is matched with the screw thread nails at the two ends of the fixing steel bar 4 to fix the soil pressure cell.
A rubber pad 8 is arranged between the fixed steel bar 4 and the soil pressure box, and the rubber pad 8 is used for preventing the soil pressure box from being sent.
Specifically, as shown in fig. 4, a positioning red line 9 is arranged outside the PVC pipe 5, and the positioning red line 9 is located outside the pipe joint of each section of the PVC pipe 5 to ensure the alignment of the positions during connection.
Specifically, the soil pressure sensor 2 is a vibrating wire soil pressure sensor, and the soil pressure cell is a vibrating wire soil pressure cell.
Specifically, the data collector 1 is a 609 frequency meter matched with the vibrating wire type soil pressure cell, and is used for collecting a frequency change value and converting the frequency change value into a soil pressure value.
Specifically, the sensor wires 3 comprise two black and red wires, and two ends of the two black and red wires are respectively connected with the soil pressure sensor 2 and the data collector 1 to form a loop.
The length of the PVC pipe 5 is determined according to the requirement for monitoring the pressure values of soil at different depths, and the grooving depth of the arc-shaped groove on the PVC pipe 5 is determined according to the size and the depth of the field drilling.
Specifically, the length of the PVC pipe joint 6 is 25-30cm, the inner diameter of the PVC pipe joint 6 is consistent with the outer diameter of the PVC pipe 5, and a circle of protruding part is arranged at the middle section of the interior of the PVC pipe joint 6 and used for facilitating the installation of the upper PVC pipe and the lower PVC pipe in the middle position.
Examples
As shown in fig. 1-4, a lateral soil pressure cell burying and positioning device comprises a data collector 1, a soil pressure sensor 2, a sensor wire 3, a fixed steel bar 4, a PVC pipe 5, a PVC pipe joint 6, a fixed screw 7, a rubber pad 8, and a positioning red line 9.
The installation steps of the device are as follows:
(1) the method is characterized in that appropriate monitoring points are selected on the road surface of the vehicle which is already on the road, when the monitoring points are in a mess, the site needs to be leveled, an appropriate drill bit is selected to drill to the target monitoring depth, the diameter of a drilled hole is required to meet the requirement that a common soil pressure box smoothly enters the drilled hole, and a certain width is reserved to facilitate standard sand backfilling. In order to prevent hole collapse when the drilling depth is large, mud dado drilling is adopted, and careful operation is carried out;
(2) the soil pressure sensor 2 is arranged in a soil pressure box, then the soil pressure box is embedded into an arc-shaped notch on a PVC pipe 5, the soil pressure box is fixed by a fixed steel bar 4, a rubber pad 8 is arranged between the fixed steel bar 4 and the soil pressure box to prevent loosening, and a nut of a fixed screw 7 is screwed;
(3) arranging all the sections of PVC pipes 5 in the open ground, transmitting the sensor leads 3 into the pipes, aligning the PVC pipes with positioning red lines 9, connecting all the sections of PVC pipes 5 through PVC pipe joints 6, fixedly leading out the sensor leads 3 to the ground end, and connecting the sensor leads 3 with the data acquisition unit 1;
(4) injecting a proper amount of standard sand into the drill hole, carefully placing the connected device into the drill hole, and slowly backfilling the standard sand to the ground surface from two sides of the device;
(5) because the backfilled drill hole can not be compacted, data acquisition can be carried out only after standard sand is completely consolidated, and sand is needed to backfill settlement caused by consolidation in the consolidation process.
Here, the soil pressure sensor 2 is a vibrating wire type soil pressure sensor, and each sensor is provided with a corresponding numerical table and a fixed conversion formula; the data acquisition unit 1 is a 609 frequency meter matched with the vibrating wire type soil pressure cell, acquires a frequency change value and converts the frequency change value into a soil pressure value;
two black and red leads are arranged in the sensor lead 3 and are connected with a 609 frequency meter to form a loop during measurement;
the fixed steel bar 4 is a flat steel bar, the width of the flat steel bar is equal to the height of the soil pressure cell, the length of the flat steel bar is more than half of the circumference of the soil pressure cell, and threaded nails are welded at two ends of the flat steel bar;
the PVC pipe 5 can be cut to any length so as to meet the requirement of monitoring the pressure values of soil at different depths; the PVC pipe 5 is provided with an arc-shaped groove, and the depth of the groove is determined according to the size and the depth of a field drilling hole; the PVC pipe 5 is hollow, so that the installation of a lead is convenient; red lines are drawn outside the tubes to ensure that the positions of all sections of tubes are aligned;
the length of the PVC pipe joint 6 is 25-30cm, the inner diameter of the joint is consistent with the outer diameter of the PVC pipe 5, a red line is drawn outside the joint pipe, a circle of protruding part is arranged at the middle section in the joint pipe, so that an upper sleeve and a lower sleeve can be conveniently installed in the middle, and when the installation length is longer, the upper sleeve and the lower sleeve can be tightly wound by using an adhesive tape to prevent looseness;
the fixing screws 7 are matched with threaded nails at two ends of the fixing steel bars 4 and used for fixing the soil pressure box;
the rubber pad 8 is arranged between the fixed steel bar 4 and the soil pressure box to prevent the soil pressure box from loosening;
the positioning red line 9 is positioned outside each section of the PVC pipe 5 and the PVC pipe joint 6, and the positions are ensured to be aligned when the PVC pipes are connected.
The above description is only for the preferred embodiment of the present invention and should not be taken as limiting the invention, and any modifications, equivalent replacements, and improvements made within the spirit and principle scope of the present invention should be included within the protection scope of the present invention.
Claims (9)
1. The utility model provides a positioner is buried underground to side direction soil pressure cell which characterized in that: the soil pressure sensor comprises a data acquisition unit (1), a soil pressure sensor (2), a sensor wire (3), a fixed steel bar (4), a PVC pipe (5) and a PVC pipe joint (6); the soil pressure sensor (2) is positioned in the soil pressure box and used for measuring soil pressure; the PVC pipe (5) comprises a plurality of sections, each section is provided with an arc-shaped notch vertical to the length direction of the pipe, and the soil pressure box is embedded into the arc-shaped notch on the PVC pipe (5) and fixed through a fixing steel bar (4); the PVC pipes (5) are connected into a long pipe through PVC pipe joints (6) and buried in a drill hole at a road surface monitoring point; the sensor wire (3) is positioned in the PVC pipe (5), one end of the sensor wire (3) is connected with the soil pressure sensor (2), and the other end of the sensor wire extends out of the PVC pipe (5) and is connected with the data collector (1) on the ground.
2. A lateral earth pressure cell burying and positioning device as claimed in claim 1, wherein: the fixed steel bar (4) is a flat steel bar, the width of the flat steel bar is equal to the height of the soil pressure cell, the length of the flat steel bar is greater than half of the perimeter of the soil pressure cell, and threaded nails are welded at the two ends of the flat steel bar.
3. A lateral soil pressure cell burying and positioning device as claimed in claim 2, wherein: the fixed steel bar (4) is fixed on the PVC pipe (5) through a fixed screw (7); the fixed screw (7) is matched with the threaded nails at the two ends of the fixed steel bar (4) to fix the soil pressure cell.
4. A lateral earth pressure cell burying and positioning device as claimed in claim 3, wherein: a rubber pad (8) is arranged between the fixed steel bar (4) and the soil pressure box, and the rubber pad (8) is used for preventing the soil pressure box from being sent to the soil pressure box.
5. A lateral earth pressure cell burying and positioning device as claimed in claim 1, wherein: the outside of tubes of PVC pipe (5) is equipped with location red line (9), location red line (9) are located the coupling outside of every section PVC pipe (5) for position alignment when guaranteeing to connect.
6. A lateral earth pressure cell burying and positioning device as claimed in claim 1, wherein: the soil pressure sensor (2) is a vibrating wire type soil pressure sensor, and the soil pressure box is a vibrating wire type soil pressure box.
7. A lateral earth pressure cell burying and positioning device as claimed in claim 6, wherein: the data acquisition unit (1) is a 609 frequency meter matched with the vibrating wire type soil pressure cell and is used for acquiring a frequency change value and converting the frequency change value into a soil pressure value.
8. A lateral earth pressure cell burying and positioning device as claimed in claim 1, wherein: the sensor wires (3) comprise black wires and red wires, and two ends of the black wires and the red wires are respectively connected with the soil pressure sensor (2) and the data collector (1) to form a loop.
9. A lateral earth pressure cell burying and positioning device as claimed in any one of claims 1-8, wherein: the length of the PVC pipe joint (6) is 25-30cm, the inner diameter of the PVC pipe joint (6) is consistent with the outer diameter of the PVC pipe (5), and a circle of protruding part is arranged in the middle section of the interior of the PVC pipe joint (6) and used for facilitating the installation of the upper PVC pipe and the lower PVC pipe in the center.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020492766.7U CN211898292U (en) | 2020-04-07 | 2020-04-07 | Lateral soil pressure cell embedding and positioning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020492766.7U CN211898292U (en) | 2020-04-07 | 2020-04-07 | Lateral soil pressure cell embedding and positioning device |
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| CN211898292U true CN211898292U (en) | 2020-11-10 |
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| CN202020492766.7U Expired - Fee Related CN211898292U (en) | 2020-04-07 | 2020-04-07 | Lateral soil pressure cell embedding and positioning device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112924070A (en) * | 2021-01-28 | 2021-06-08 | 湖南省城乡建设勘测院 | Soil pressure monitoring station and ground disaster detection early warning system |
| CN115387411A (en) * | 2022-09-30 | 2022-11-25 | 吉林建筑大学 | Splicing embedding device suitable for soil fixing pressure box |
-
2020
- 2020-04-07 CN CN202020492766.7U patent/CN211898292U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112924070A (en) * | 2021-01-28 | 2021-06-08 | 湖南省城乡建设勘测院 | Soil pressure monitoring station and ground disaster detection early warning system |
| CN115387411A (en) * | 2022-09-30 | 2022-11-25 | 吉林建筑大学 | Splicing embedding device suitable for soil fixing pressure box |
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Granted publication date: 20201110 |