CN111705773A - Movable pore water pressure tester - Google Patents
Movable pore water pressure tester Download PDFInfo
- Publication number
- CN111705773A CN111705773A CN202010396903.1A CN202010396903A CN111705773A CN 111705773 A CN111705773 A CN 111705773A CN 202010396903 A CN202010396903 A CN 202010396903A CN 111705773 A CN111705773 A CN 111705773A
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- tester
- water pressure
- pore water
- expandable outer
- tester main
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D1/00—Investigation of foundation soil in situ
- E02D1/02—Investigation of foundation soil in situ before construction work
- E02D1/027—Investigation of foundation soil in situ before construction work by investigating properties relating to fluids in the soil, e.g. pore-water pressure, permeability
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0001—Rubbers
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Soil Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a movable pore water pressure tester, which comprises a tester main body, wherein an expandable outer ring is wrapped around the tester main body, an inner cavity is arranged in the expandable outer ring, the tester main body is provided with an insertion pipe with an inner hole, the inner hole is straight up and down, the expandable outer ring is connected with a pressurizing and emptying device through a long guide pipe, the tester main body is connected with a data acquisition and analysis device through a long guide wire, and the expandable outer ring can be tightly matched with the inner wall of the insertion pipe and is in liquid seal after being expanded. The invention also provides a pore water pressure testing method by adopting the movable pore water pressure tester, the movable pore water pressure tester can move in the depth direction in the pipeline and can position and measure the pore water pressure at the depth position, and the mode of acquiring the pore water pressure values at different depths is simpler and more convenient.
Description
Background
The pore water pressure value is data which is often used in foundation treatment, the traditional pore water pressure value testing method needs to test the pore water pressure value by punching a pore water pressure tester to a soil body with a specific depth, the pore water pressure testing of each depth needs to be punched again, and the labor cost and the material cost are greatly consumed.
Disclosure of Invention
The invention aims to solve the technical problem of providing a movable pore water pressure tester which can realize the measurement of pore water pressure with different depths by one-time pipe insertion and multiple times.
Therefore, the movable pore water pressure tester provided by the invention comprises a tester main body, wherein the tester main body is wrapped with an expandable outer ring in a surrounding manner, an inner cavity is formed in the expandable outer ring, a balance weight is arranged at the bottom of the tester main body, the gravity of the balance weight, the tester main body and the expandable outer ring is larger than the buoyancy of the balance weight, the tester main body and the expandable outer ring in water, the tester main body is provided with an insertion pipe with an inner hole, the inner hole is straight up and down, the expandable outer ring is connected with a pressurizing and emptying device through a long guide pipe, the tester main body is connected with a data acquisition and analysis device through a long guide wire, and the expandable outer ring can be tightly matched with the.
Further, the intubate is the pipe, the tester main part is circularly, and the tester main part outside has the ring channel, and the ring channel is external opening, and the ring channel cross-section is the arc, the inboard and the ring channel matching of expandable outer lane, on the solid fixed ring inslot wall of inboard laminating of expandable outer lane.
Furthermore, the tester shell is provided with an inflatable connecting end connected with the long conduit, and the inflatable connecting end penetrates through the tester shell and is communicated with the interior of the expandable outer ring; the tester main part lower extreme has the protruding edge of entry, and the protruding periphery of edge of entry has the external screw thread, and the counter weight is the ring form that matches with the outer edge of entry, counter weight threaded connection in on the protruding edge of entry.
Furthermore, the expandable outer ring is made of high-elasticity rubber, and the outer side surface of the expandable outer ring is provided with smooth surfaces which are distributed annularly.
Furthermore, the long guide pipe or the long guide wire is provided with length scales, and depth data below the tester main body is obtained by recording the length of the inserted pipe.
Furthermore, water inlets are formed in the insertion pipe at intervals, length scales are arranged on the insertion pipe, and the depth position of each water inlet is calculated through the depth of the insertion pipe.
The invention also provides a pore water pressure testing method by adopting the movable pore water pressure tester, which comprises the following steps:
A. drilling a hole in the soil body by using an engineering drilling machine, and then inserting the insertion pipe into the hole;
B. hoisting the tester main body and the expandable outer ring into the insertion pipe, obtaining the downward depth data of the tester main body by observing the scale on the long guide pipe or the long guide wire, obtaining the insertion depth data of the insertion pipe by the length scale on the exposed part of the insertion pipe, calculating the depth position of each water inlet hole by combining the distribution distance of the water inlet holes, and stopping the tester main body at the depth position avoiding the water inlet holes;
C. starting the pressurizing and discharging device to inflate the expandable outer ring through the long guide pipe, so that the expandable outer ring is expanded and tightly expanded on the inner wall of the insertion pipe;
D. starting the tester main body to test the pore water pressure at the depth position, transmitting the obtained pore water pressure data to a data acquisition and analysis device through a long lead, and then starting a pressurizing and emptying device to empty the expandable outer ring;
E. the above step B, C, D is repeated to obtain pore water pressure values at different depths.
The invention provides the following technical effects: the movable pore water pressure tester provided by the invention can realize positioning or separation by inflating or deflating (or liquid) the expandable outer ring to expand the expandable outer ring on the inner wall of the insertion tube, thereby facilitating the testing of pore water pressures at different depths. Compared with the traditional testing device and method, the movable pore water pressure tester provided by the invention is more convenient to operate and lower in cost.
Drawings
Fig. 1 is an enlarged schematic view of the structure of the movable pore water pressure tester provided by the invention.
Fig. 2 is a schematic structural view of the movable pore water pressure tester in fig. 1 after being suspended into an insertion tube in a soil body, wherein the tester is positioned at the upper layer of the soil body and the expandable outer ring is in a deflation state.
Fig. 3 is a schematic structural view of the movable pore water pressure tester in fig. 1 after being suspended in an insertion tube in a soil body, wherein the tester is in a lower layer of the soil body and the expandable outer ring is in a state of being expanded on the inner wall of the insertion tube after being inflated.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "bottom" and "top," "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
Referring to fig. 1-3, the movable pore water pressure tester provided by the invention comprises a tester main body 1, wherein the tester main body 1 is wrapped with an expandable outer ring 2 in a surrounding manner, an inner cavity 3 is arranged in the expandable outer ring 2, a counterweight 4 with a tip end is arranged at the bottom of the tester main body 1, an inlet convex edge 5 is arranged at the lower end of the tester main body 1, external threads are arranged on the periphery of the inlet convex edge 5, the counterweight 4 is in a ring shape matched with the inlet outer edge 5, the counterweight 4 is in threaded connection with the inlet convex edge 5, the gravity of the counterweight 4, the tester main body 1 and the expandable outer ring 2 is greater than the buoyancy of the three in water, so that the tester main body 1 can sink to the deep position after underground water is filled into an insertion pipe, the insertion pipe 6 with an inner hole is arranged in the tester main body 1, the inner hole is in a straight-through manner, the expandable outer ring 2 is, the pressure charging and emptying device 8 is composed of an inflating mechanism and a valve capable of being opened and closed in an electric control mode, the valve is opened during inflation to start the inflating mechanism, the valve can be closed after the expandable outer ring 2 is firmly positioned on the inner wall of the insertion tube, the valve is opened during deflation, the tester main body 1 is connected with the data acquisition and analysis device 10 through the long lead 9, and the expandable outer ring 2 can be tightly matched with the inner wall of the insertion tube 6 and sealed in a liquid mode after being expanded.
Referring to fig. 1 and 3, the insertion tube 6 is a circular tube, the tester main body 1 is circular, an annular groove 11 is formed in the outer side of the tester main body 1, the annular groove 11 is opened outwards, the cross section of the annular groove 11 is arc-shaped, the inner side of the expandable outer ring 2 is matched with the annular groove 11, and the inner side of the annular groove 11 is attached to the inner side wall of the fixing ring of the expandable outer ring 2. The tester shell 12 is provided with an inflation connecting end 13 connected with the long guide pipe 7, and the inflation connecting end 13 penetrates through the tester shell 12 and is communicated with the interior of the expandable outer ring 2. The expandable outer ring 2 is made of high-elasticity rubber, the outer side surface of the expandable outer ring 2 is provided with smooth surfaces distributed annularly, and the smooth surfaces of the high-elasticity rubber are matched with the inner wall of the insertion tube 6 to be beneficial to forming a sealing surface.
Referring to fig. 2 and 3, in order to simply obtain the depth below the tester main body 1, the long guide tube 7 or the long guide wire 9 is provided with length scales, and the depth data below the tester main body 1 is obtained by recording the length of the inserted cannula 6.
Referring to fig. 2 and 3, in order to enable groundwater to reach a test position more quickly, water inlets 14 are formed in the insertion pipe 6 at intervals, length scales are arranged on the insertion pipe 6, and the depth position of each water inlet 14 is calculated through the depth of the insertion pipe 6.
Referring to fig. 1 to 3, the present invention also provides a pore water pressure testing method using the movable pore water pressure tester, comprising the following steps:
A. drilling a hole in the soil body by using an engineering drilling machine, and then inserting the insertion pipe 6 into the hole;
B. hoisting the tester main body 1 and the expandable outer ring 2 into the insertion pipe 6, obtaining the downward-placing depth data of the tester main body 1 by observing the scales on the long guide pipe 7 or the long guide wire 9, obtaining the insertion depth data of the insertion pipe 6 by the length scales on the exposed part of the insertion pipe 6, and calculating the depth position of each water inlet 14 by combining the distribution interval of the water inlet 14, wherein the water inlet 14 is arranged at the interval of 1 meter from the bottom end of the insertion pipe 6 in the embodiment, and the tester main body 1 stops at the depth position avoiding the water inlet 14;
C. the charging and discharging device 8 is started to charge the expandable outer ring 2 through the long guide tube 7, so that the expandable outer ring 2 is expanded and tightly expanded on the inner wall of the insertion tube 6;
D. starting the tester main body 1 to test the pore water pressure at the depth position, transmitting the obtained pore water pressure data to the data acquisition and analysis device 10 through the long lead 9, and then starting the pressurizing and emptying device 8 to empty the expandable outer ring 2;
E. the above step B, C, D is repeated to obtain pore water pressure values at different depths.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (10)
1. The utility model provides a movable pore water pressure tester, includes the tester main part, characterized by: the tester main part surrounds the parcel and has the expandable outer lane, has the inner chamber in the expandable outer lane, tester main part bottom is provided with the counter weight, and the gravity of counter weight, tester main part and expandable outer lane is greater than the buoyancy of three in aqueous, the tester main part disposes the intubate of taking the hole, and the hole leads directly from top to bottom, the expandable outer lane passes through long pipe and pressurizes and the unloading device is connected, the tester main part passes through long wire and is connected with data acquisition and analytical equipment, expandable outer lane inflation back can with intubate inner wall tight fit and liquid seal.
2. The movable pore water pressure tester of claim 1, wherein: the intubate is the pipe, the tester main part is circularly, and the tester main part outside has the ring channel, and the ring channel is external opening, and the ring channel cross-section is the arc, the inboard and the ring channel matching of expandable outer lane, on the solid fixed ring inslot wall of the inboard laminating of expandable outer lane.
3. The movable pore water pressure tester of claim 2, wherein: the tester shell is provided with an inflatable connecting end connected with the long conduit, and the inflatable connecting end penetrates through the tester shell and is communicated with the interior of the expandable outer ring; the tester main part lower extreme has the protruding edge of entry, and the protruding periphery of edge of entry has the external screw thread, and the counter weight is the ring form that matches with the outer edge of entry, counter weight threaded connection in on the protruding edge of entry.
4. The mobile pore water pressure tester of claim 1, 2 or 3, wherein: the expandable outer ring is made of high-elasticity rubber, and the outer side surface of the expandable outer ring is provided with annularly distributed smooth surfaces.
5. The mobile pore water pressure tester of claim 1, 2 or 3, wherein: the long guide pipe or the long guide wire is provided with length scales, and depth data below the tester main body is obtained by recording the length of the inserted pipe.
6. The movable pore water pressure tester as claimed in claim 4, wherein: the long guide pipe or the long guide wire is provided with length scales, and depth data below the tester main body is obtained by recording the length of the inserted pipe.
7. The mobile pore water pressure tester of claim 1, 2 or 3, wherein: the intubation tube is provided with water inlet holes at intervals, length scales are arranged on the intubation tube, and the depth position of the water inlet hole is calculated through the depth of the intubation tube.
8. The movable pore water pressure tester as claimed in claim 4, wherein: the intubation tube is provided with water inlet holes at intervals, length scales are arranged on the intubation tube, and the depth position of the water inlet hole is calculated through the depth of the intubation tube.
9. The movable pore water pressure tester as claimed in claim 5, wherein: the intubation tube is provided with water inlet holes at intervals, length scales are arranged on the intubation tube, and the depth position of the water inlet hole is calculated through the depth of the intubation tube.
10. A pore water pressure measuring method using the movable pore water pressure measuring instrument according to claim 7, characterized in that: the method comprises the following steps:
A. drilling a hole in the soil body by using an engineering drilling machine, and then inserting the insertion pipe into the hole;
B. hoisting the tester main body and the expandable outer ring into the insertion pipe, obtaining the downward depth data of the tester main body by observing the scale on the long guide pipe or the long guide wire, obtaining the insertion depth data of the insertion pipe by the length scale on the exposed part of the insertion pipe, calculating the depth position of each water inlet hole by combining the distribution distance of the water inlet holes, and stopping the tester main body at the depth position avoiding the water inlet holes;
C. starting the pressurizing and discharging device to inflate the expandable outer ring through the long guide pipe, so that the expandable outer ring is expanded and tightly expanded on the inner wall of the insertion pipe;
D. starting the tester main body to test the pore water pressure at the depth position, and transmitting the obtained pore water pressure data to the data acquisition and analysis device through a long lead;
E. the above step B, C, D is repeated to obtain pore water pressure values at different depths.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010396903.1A CN111705773A (en) | 2020-05-12 | 2020-05-12 | Movable pore water pressure tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010396903.1A CN111705773A (en) | 2020-05-12 | 2020-05-12 | Movable pore water pressure tester |
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| Publication Number | Publication Date |
|---|---|
| CN111705773A true CN111705773A (en) | 2020-09-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010396903.1A Pending CN111705773A (en) | 2020-05-12 | 2020-05-12 | Movable pore water pressure tester |
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| CN (1) | CN111705773A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07190871A (en) * | 1993-12-27 | 1995-07-28 | Pub Works Res Inst Ministry Of Constr | Installation method of water-pressure gage for measurement of pore water pressure at inside of ground |
| KR100687630B1 (en) * | 2006-07-21 | 2007-02-27 | 주식회사 도화종합기술공사 | Ground packer test apparatus measuring porewater pressure at the hole |
| CN102108697A (en) * | 2009-12-25 | 2011-06-29 | 崔开华 | Drilling pressurized-water testing/grouting device |
| CN203498817U (en) * | 2013-09-30 | 2014-03-26 | 中交上海航道勘察设计研究院有限公司 | Continuous pore water pressure measuring device |
| CN105256785A (en) * | 2015-10-30 | 2016-01-20 | 湖南科技大学 | Device capable of repeatedly utilizing pore water pressure gauges and manufacturing method of device |
| CN205152930U (en) * | 2015-11-09 | 2016-04-13 | 上海达华测绘有限公司 | Pore pressure cell buries device underground |
| CN208072365U (en) * | 2018-04-11 | 2018-11-09 | 深圳市水务规划设计院有限公司 | The infiltrative pressure water test device of rock-soil layer is automatically determined in a kind of geological mapping |
| CN108951595A (en) * | 2018-08-03 | 2018-12-07 | 长安大学 | One kind porous water pressure gauge in one hole buries structure and method for embedding |
-
2020
- 2020-05-12 CN CN202010396903.1A patent/CN111705773A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07190871A (en) * | 1993-12-27 | 1995-07-28 | Pub Works Res Inst Ministry Of Constr | Installation method of water-pressure gage for measurement of pore water pressure at inside of ground |
| KR100687630B1 (en) * | 2006-07-21 | 2007-02-27 | 주식회사 도화종합기술공사 | Ground packer test apparatus measuring porewater pressure at the hole |
| CN102108697A (en) * | 2009-12-25 | 2011-06-29 | 崔开华 | Drilling pressurized-water testing/grouting device |
| CN203498817U (en) * | 2013-09-30 | 2014-03-26 | 中交上海航道勘察设计研究院有限公司 | Continuous pore water pressure measuring device |
| CN105256785A (en) * | 2015-10-30 | 2016-01-20 | 湖南科技大学 | Device capable of repeatedly utilizing pore water pressure gauges and manufacturing method of device |
| CN205152930U (en) * | 2015-11-09 | 2016-04-13 | 上海达华测绘有限公司 | Pore pressure cell buries device underground |
| CN208072365U (en) * | 2018-04-11 | 2018-11-09 | 深圳市水务规划设计院有限公司 | The infiltrative pressure water test device of rock-soil layer is automatically determined in a kind of geological mapping |
| CN108951595A (en) * | 2018-08-03 | 2018-12-07 | 长安大学 | One kind porous water pressure gauge in one hole buries structure and method for embedding |
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Application publication date: 20200925 |