CN218757385U - From spiral plate load test probe of taking pore pressure monitoring - Google Patents
From spiral plate load test probe of taking pore pressure monitoring Download PDFInfo
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- CN218757385U CN218757385U CN202222866084.XU CN202222866084U CN218757385U CN 218757385 U CN218757385 U CN 218757385U CN 202222866084 U CN202222866084 U CN 202222866084U CN 218757385 U CN218757385 U CN 218757385U
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Abstract
The utility model discloses a spiral plate load test probe with pore pressure monitoring function, which comprises a probe body, two miniature pore pressure meters and a transmission line, wherein the probe body consists of a main shaft and a spiral bearing plate, and a groove is respectively arranged on the main shaft at the starting point and the end point of the upper end and the lower end of the spiral bearing plate; two micro pore pressure meters are respectively arranged in one groove; the micro pore pressure meter is cylindrical, and the shape of the groove is matched with that of the micro pore pressure meter; the transmission line is connected with the data acquisition instrument and is used for transmitting a pore pressure gauge voltage signal; a protective steel sheet is arranged on the outer side of the micro pore pressure meter; the protective steel sheet is embedded in the main shaft and consists of a circular protective sheet and a plurality of fixed sheets uniformly distributed around the circular protective sheet; a plurality of round holes are uniformly distributed on the round protection sheet. The pore pressure variation around the test probe of the two micro pore pressure meters is used for defining the dissipation process of the excess pore pressure in the test process, providing an auxiliary standard for terminating the loading of the spiral plate load test and providing a basis for evaluating the permeability coefficient of the test soil layer.
Description
Technical Field
The utility model relates to a load test field especially relates to a from spiral plate load test probe of taking hole pressure monitoring.
Background
The load test is an in-situ test method for directly obtaining soil body strength parameters, and the reliability of the result is deeply approved by engineering investigation and design workers. With the development of engineering construction to deep stratum, the depth of a required load test is increased, and deep spiral plate load tests are applied more and more. The deep soil body has higher bearing capacity due to the influence of factors such as larger ground stress and the like, so that the loading amplitude required by the spiral plate load test is higher, the deep soil body is always in a saturated state, and the applied load can cause the soil body around the spiral plate probe to generate additional effective stress and certain super pore pressure. And one of the experimental standard of load test is that deformation under certain load reaches stably, and the super pore pressure can influence the experimental end standard of spiral plate load test, influences the accuracy of test result, consequently, needs a novel test probe that can aassessment spiral plate probe soil body seepage flow around urgently.
SUMMERY OF THE UTILITY MODEL
For solving the problem that above-mentioned prior art exists, the utility model provides a from spiral plate load test probe of taking hole to press monitoring.
Therefore, the utility model adopts the following technical scheme:
a spiral plate load test probe with pore pressure monitoring comprises a probe body, two miniature pore pressure meters, a protection steel sheet and a transmission line, wherein the probe body is a standard spiral probe and consists of a main shaft and a spiral bearing plate, and the main shaft at the starting point and the ending point of the upper end and the lower end of the spiral bearing plate is respectively provided with a groove; two micro pore pressure meters are respectively arranged in one groove; the micro pore pressure meter is cylindrical, and the shape of the groove is matched with that of the micro pore pressure meter; the transmission line is connected with the data acquisition instrument and is used for transmitting a voltage signal of the pore pressure meter; the protection steel sheet is arranged on the outer side of the micro pore pressure meter; the protective steel sheet is embedded in the main shaft and consists of a circular protective sheet and a plurality of fixing sheets uniformly distributed around the circular protective sheet; a plurality of round holes are uniformly distributed on the circular protective sheet, and each fixing sheet is provided with a hole; the protection steel sheet is installed on the main shaft through screws.
Preferably, the column body of the micro pore pressure meter is sleeved with a silica gel sleeve, and the tail part of the micro pore pressure meter is provided with a waterproof gasket.
Preferably, the height of the column of the micro pore pressure meter is 5mm-10mm, and the diameter is 2mm-7mm; the diameter of the waterproof gasket is the same as that of the micro pore pressure gauge, and the thickness of the waterproof gasket is 0.5-2mm; the thickness of the silica gel sleeve is 0.2-2mm, and the size of the silica gel sleeve is adapted to the micro pore pressure meter.
The thickness of the protective steel sheet is 1.0mm-3.0mm; the circular protection plate is a sieve-shaped steel sheet with holes, the outer diameter of the circular protection plate is equal to or slightly larger than the diameter of the micro pore pressure gauge, 4-10 circular holes are distributed on the circular protection plate, and the diameter of each circular hole is 0.5-1.5 mm.
The utility model discloses following beneficial effect has:
in the loading process of the spiral plate load test, the micro pore pressure meter can test the pore pressure change around the probe, so that the dissipation process of the excess pore pressure in the test process is defined, an auxiliary standard is provided for terminating the loading of the spiral plate load test, and a basis is provided for evaluating the permeability coefficient of a test soil layer; the waterproof gasket and the silica gel sleeve avoid the structural damage to the micro pore pressure gauge due to collision and the like in the processes of transportation, installation, testing and the like, and the service life is prolonged; the protection steel sheet is used for avoiding the abrasion damage of the soil body to the pore pressure gauge in the process that the spiral probe drills into the test position, and simultaneously, the pore pressure gauge can sense the excess pore pressure of the soil body around the probe in the test process.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a micro pore pressure gauge mounting structure;
FIG. 3 is a schematic view of a protective steel sheet.
In the figure:
1. miniature pore pressure meter 2, protection steel sheet 3, transmission line 4, main shaft 5, spiral pressure-bearing plate
11. Waterproof gasket 12, silica gel sleeve 21, circular protection sheet 22, fixing piece
Detailed Description
The following describes the specific structure of the present invention in detail with reference to the accompanying drawings.
As shown in figures 1-3, the utility model discloses a from spiral plate load test probe of taking pore pressure monitoring includes probe body, miniature pore pressure meter 1, protection steel sheet 2 and transmission line 3.
The probe body is a standard spiral probe and consists of a main shaft 4 and a spiral bearing plate 5. The main shaft 4 is provided with a groove at the starting point and the ending point of the upper end and the lower end of the spiral bearing plate 5. Two micro-pore pressure gauges 1 are respectively installed in one of the grooves (i.e., respectively aligned with the upper and lower edges of the spiral bearing plate 5). The micro pore pressure meter 1 is cylindrical, a data transmission line 3 of the micro pore pressure meter 1 is connected with a data acquisition instrument, and the transmission line 3 is used for transmitting a voltage signal of the pore pressure meter.
Referring to fig. 2 and 3, in order to avoid the abrasion damage of the soil body to the micro pore pressure gauge 1 in the process that the spiral probe is drilled to the test position and simultaneously ensure that the micro pore pressure gauge 1 can sense the excess pore pressure of the soil body around the probe in the test process, the protection steel sheet 2 is arranged on the outer side of the micro pore pressure gauge 1. The protective steel sheet 2 is embedded in the main shaft 4 and consists of a circular protective sheet 21 and a plurality of fixing sheets 22 uniformly distributed around the circular protective sheet 21; a plurality of round holes are uniformly distributed on the round protection sheet 21, and each fixing sheet 22 is provided with a hole for mounting a screw. The protective steel sheet 2 is mounted on the main shaft 4 by screws.
In order to avoid damage to the structure of the micro pore pressure gauge due to collision and the like in the transportation, installation and test processes and prolong the service life of the micro pore pressure gauge, a silica gel sleeve is sleeved on the column body of the micro pore pressure gauge 1, and a waterproof gasket is further arranged at the tail part of the micro pore pressure gauge 1.
In one embodiment of the present invention, the micro pore pressure gauge is a cylinder with a diameter of 5mm and a height of 8 mm; the diameter of the waterproof gasket 11 is 5mm, and the thickness is 1mm; the thickness of silica gel cover 12 is 0.5mm, and height 8mm, annular cross-section internal diameter is 5mm. The pressure sensing side of the micro pore pressure gauge 1 is externally provided with a protective steel sheet 2, the thickness of the protective steel sheet is 1.0mm, a round protective sheet 21 of the protective steel sheet 2 is a sieve-shaped round steel sheet with round holes, the diameter of the steel sheet is 5mm, the diameter of the round holes on the steel sheet is 1mm, and the number of the round holes is 6. The fixed pieces 21 are uniformly distributed on the outer edges of the circular protection plates 21, the number of the fixed pieces is 4, the side length of each fixed piece is 1.5mm, and the diameter of each screw hole is 1.0mm.
In the loading process of the spiral plate load test, the micro pore pressure gauge 1 can test the pore pressure change around the probe, the ultra-pore pressure dissipation process in the test process is definite, an auxiliary standard is provided for the termination of the loading of the spiral plate load test, and a basis is also provided for evaluating the permeability coefficient of a test soil layer.
Claims (4)
1. The utility model provides a from spiral plate load test probe of taking pore pressure monitoring which characterized in that: comprises a probe body, two micro pore pressure gauges, a protective steel sheet and a transmission line,
the probe body is a standard spiral probe and consists of a main shaft and a spiral bearing plate, and grooves are respectively formed in the positions of the starting point and the ending point of the upper end and the lower end of the spiral bearing plate on the main shaft; two micro pore pressure meters are respectively arranged in one groove;
the micro pore pressure meter is cylindrical, and the shape of the groove is matched with that of the micro pore pressure meter; the transmission line is connected with the data acquisition instrument and is used for transmitting a voltage signal of the pore pressure meter;
the protection steel sheet is arranged on the outer side of the micro pore pressure meter; the protective steel sheet is embedded in the main shaft and consists of a circular protective sheet and a plurality of fixing sheets uniformly distributed around the circular protective sheet; a plurality of round holes are uniformly distributed on the circular protective sheet, and each fixing sheet is provided with a hole; the protection steel sheet is installed on the main shaft through screws.
2. A spiral plate load test probe with pressure monitoring as claimed in claim 1, wherein: the column body of the micro pore pressure gauge is sleeved with a silica gel sleeve, and the tail part of the micro pore pressure gauge is provided with a waterproof gasket.
3. A spiral plate load test probe with pressure monitoring as claimed in claim 2, wherein: the height of the column body of the micro pore pressure meter is 5mm-10mm, and the diameter is 2mm-7mm; the diameter of the waterproof gasket is the same as that of the micro pore pressure gauge, and the thickness of the waterproof gasket is 0.5-2mm; the thickness of the silica gel sleeve is 0.2-2mm, and the size of the silica gel sleeve is adapted to the micro pore pressure meter.
4. A spiral plate load test probe with pressure monitoring as claimed in claim 3, wherein: the thickness of the protective steel sheet is 1.0mm-3.0mm; the circular protection plate is a sieve-shaped steel sheet with holes, the outer diameter of the circular protection plate is equal to or slightly larger than the diameter of the micro hole pressure gauge, 4-10 circular holes are distributed on the circular protection plate, and the diameter of each circular hole is 0.5-1.5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222866084.XU CN218757385U (en) | 2022-10-29 | 2022-10-29 | From spiral plate load test probe of taking pore pressure monitoring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222866084.XU CN218757385U (en) | 2022-10-29 | 2022-10-29 | From spiral plate load test probe of taking pore pressure monitoring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218757385U true CN218757385U (en) | 2023-03-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222866084.XU Active CN218757385U (en) | 2022-10-29 | 2022-10-29 | From spiral plate load test probe of taking pore pressure monitoring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218757385U (en) |
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2022
- 2022-10-29 CN CN202222866084.XU patent/CN218757385U/en active Active
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