CN109029346B - Integrated monitoring device and measuring method for osmotic pressure and settlement in soft soil foundation - Google Patents
Integrated monitoring device and measuring method for osmotic pressure and settlement in soft soil foundation Download PDFInfo
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- CN109029346B CN109029346B CN201810926448.4A CN201810926448A CN109029346B CN 109029346 B CN109029346 B CN 109029346B CN 201810926448 A CN201810926448 A CN 201810926448A CN 109029346 B CN109029346 B CN 109029346B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C5/00—Measuring height; Measuring distances transverse to line of sight; Levelling between separated points; Surveyors' levels
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L11/00—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention relates to a safety monitoring technology of osmotic pressure and settlement, in particular to an integrated observation device and a measurement method for monitoring osmotic pressure and settlement in a soft soil foundation. The invention relates to an integrated monitoring device for osmotic pressure and settlement in a soft soil foundation, which comprises a measuring pipe, wherein the measuring pipe is divided into a measuring pipe permeable pipe and a measuring pipe aqueduct, a settlement bottom plate is arranged between the measuring pipe permeable pipe and the measuring pipe aqueduct, the bottom of the measuring pipe permeable pipe is sealed, a protection pipe is arranged outside the measuring pipe, the protection pipe comprises a protection pipe movable pipe and a protection pipe fixed pipe, the protection pipe movable pipe is arranged on the settlement bottom plate, an osmometer is arranged in the measuring pipe permeable pipe, and one end of the osmometer is connected with a cable. The integrated observation device and the measurement method for monitoring the osmotic pressure and the settlement in the soft soil foundation have simple structures and convenient operation.
Description
Technical Field
The invention relates to a safety monitoring technology of osmotic pressure and settlement, in particular to an integrated observation device and a measurement method for monitoring osmotic pressure and settlement in a soft soil foundation.
Background
In the soft soil foundation, due to engineering geological conditions, boundary conditions, filling and digging conditions and other reasons, soil body settlement, lateral deformation and underground water level changes can be caused in the soft soil foundation treatment process and later operation, and the changes have more or less influence on the engineering itself, surrounding buildings, pipelines, roads and the like. Therefore, in order to ensure the smooth progress of the project and the quality of the project, safety monitoring must be carried out in the process of treating the foundation. At present, the monitoring methods of the seepage pressure and the settlement are often independent, and the following problems are often caused in the soft soil foundation: 1) the lateral deformation of the foundation causes the bending deformation of the side rod of the settlement plate, and the settlement measurement is inaccurate; 2) the osmometer is settled along with the foundation, so that the water level and the osmotic pressure are inaccurate to measure; 3) the osmometer is damaged and cannot be replaced; 4) overlarge foundation settlement, tension breakage of a cable of the osmometer and the like. Therefore, aiming at the problems, the research of integrating the osmotic pressure and the settlement in the soft soil foundation soil has great practical significance.
Disclosure of Invention
Aiming at the current technical situation of monitoring settlement and osmotic pressure in a soft soil foundation, the invention aims to provide an economical and reliable measuring device and an observation method, the device has simple structure principle and convenient and quick operation, and can well solve the problems; the specific scheme is as follows:
the utility model provides an osmotic pressure and subside integration monitoring devices in weak soil foundation, includes the survey pipe, the survey pipe divide into survey pipe and permeate water the pipe and survey the pipe aqueduct, it permeates water to be equipped with between pipe and the survey pipe aqueduct and subsides the bottom plate to survey the pipe, it permeates water the socle portion and seals to survey the pipe, it is equipped with the protection tube to survey the outside of tubes, the protection tube includes that the protection tube movable tube is fixed with the protection tube to manage, the protection tube movable tube is installed on subsiding the bottom plate, it is equipped with the osmometer to survey the pipe and permeate water in the pipe, osmometer.
The water permeable pipe of the measuring pipe is provided with a plurality of holes, and the area of each hole accounts for 10% -20% of the surface area of the water permeable pipe of the measuring pipe. The water can be ensured to flow out, but the equipment is not influenced too fast.
The diameter of the water permeable pipe of the measuring pipe is larger than that of the water guide pipe of the measuring pipe. The hysteresis problem caused by a common piezometer tube in soft soil can be greatly weakened by utilizing the characteristic that the piezometer tube is thick at the lower part and thin at the upper part.
The outside of the water permeable pipe of the measuring pipe is wrapped with two layers of non-woven geotextiles, and the osmometer is wrapped with two layers of geotextiles. Can effectively prevent soil particles from entering.
The measuring pipe water guide pipe is a multi-section pipeline, and an outer hoop joint is adopted among the multi-section pipeline. (additive) may be used when longer penstock aqueducts are required and the internal connection can be made as smooth as possible by the external ferrule fitting.
The protection tube fixing tube, the protection tube movable tube and the measuring tube aqueduct can freely stretch out and draw back each other, and a certain distance is reserved between the protection tube movable tube and the settlement plate. The measuring tube is guaranteed not to limit the deformation of the soil body, and the deformation of the soil body does not affect the extension of the measuring tube.
A measuring method using an integrated monitoring device for osmotic pressure and settlement in a soft soil foundation comprises the following steps
a. Embedding a monitoring device at a designed position, injecting water into the measuring pipe water guide pipe until the water is flush with the pipe orifice, converting the vertical distance from the pipe orifice of the measuring pipe water guide pipe section to a sedimentation bottom plate by using an osmometer through measuring water pressure, taking the first measurement as an initial value H0, and taking the later measurement as a measured value H1;
b. and measuring the elevation of the pipe orifice of the water guide pipe section of the measuring pipe by using a leveling instrument, taking the first measurement as an initial value h0, taking the later measurement as a measured value h1, converting the elevation of the settlement bottom plate, and obtaining the difference value between the elevation and the initial value as the foundation settlement value.
Sedimentation amount s = (H0-H0) - (H1-H1);
c. before the vertical distance from the water injection measuring pipe orifice to the sedimentation bottom plate, measuring a water head hp of the osmometer, and converting the water pressure of a measuring point through leveling measurement;
water pressure Hp = Hp + (H1-H1).
The invention has the beneficial effects that:
1. the invention relates to an integrated monitoring device and a measuring method for osmotic pressure and settlement in a soft soil foundation, which have the advantages of simple structure and low manufacturing cost; and the device basically does not consume materials when being buried, and is convenient and quick to operate.
2. According to the integrated monitoring device and the measuring method for the osmotic pressure and the settlement in the soft soil foundation, the vertical distance between the pipe opening of the measuring pipe and the settlement bottom plate can be measured by using the water head, and the settlement error caused by bending of the measuring pipe is effectively solved.
3. The invention relates to an integrated monitoring device and a measuring method for osmotic pressure and settlement in a soft soil foundation, which can effectively solve the problems of inaccurate measured value caused by the burying elevation change of an osmometer caused by foundation settlement, cable breakage caused by soil deformation and the like, and can also replace the damaged osmometer at any time.
4. According to the integrated monitoring device and the measuring method for the osmotic pressure and the settlement in the soft soil foundation, the hysteresis problem caused by a common pressure measuring pipe in the soft soil can be greatly weakened by utilizing the characteristic that the lower part of the pressure measuring pipe is thick and the upper part of the pressure measuring pipe is thin.
Description of the drawings:
fig. 1 is a schematic structural diagram of an integrated observation device for monitoring osmotic pressure and settlement in a soft soil foundation.
Wherein the reference numbers: 1-measuring a water guide pipe section of a pipe; 2-measuring a pipe permeable pipe; 3-settling bottom plate; 4-protecting the movable tube of the tube; 5-protecting the tube fixing tube; 6-osmometer; 7-cable.
Detailed Description
Example 1
The following further description is made in conjunction with fig. 1, and an integrated monitoring device for osmotic pressure and settlement in soft soil foundation comprises a measuring pipe, wherein the measuring pipe is divided into a measuring pipe permeable pipe 2 and a measuring pipe water guide pipe 1, a settlement bottom plate 3 is arranged between the measuring pipe permeable pipe 2 and the measuring pipe water guide pipe 1, the bottom of the measuring pipe permeable pipe 2 is sealed, a protection pipe is arranged outside the measuring pipe and comprises a protection pipe movable pipe 4 and a protection pipe fixing pipe 5, the protection pipe movable pipe 4 is installed on the settlement bottom plate 3, an osmometer 6 is arranged in the installation measuring pipe permeable pipe 2, and one end of the osmometer 6 is connected with a cable 7. The water permeable pipe 2 of the measuring pipe is provided with a plurality of holes, and the area of each hole accounts for 10% -20% of the surface area of the water permeable pipe of the measuring pipe; the water can be ensured to flow out, but the equipment is not influenced too fast. The diameter of the water permeable pipe 2 of the measuring pipe is larger than that of the water guide pipe 1 of the measuring pipe; the hysteresis problem caused by a common piezometer tube in soft soil can be greatly weakened by utilizing the characteristic that the piezometer tube is thick at the lower part and thin at the upper part. The exterior of the water permeable pipe 2 of the measuring pipe is wrapped with two layers of non-woven geotextile, and the osmometer 6 is wrapped with two layers of geotextile. The measuring pipe water guide pipe 1 is a multi-section pipeline, and an outer hoop joint is adopted among the multi-section pipelines; the water guide pipe can be used when a long measuring pipe water guide pipe is needed, and the internal connection can be smooth as much as possible through the external hoop connector. The protection tube fixing tube, the protection tube movable tube and the measuring tube water guide tube can freely stretch out and draw back mutually, a certain distance is reserved between the protection tube movable tube and the settlement plate, the measuring tube is guaranteed not to limit soil deformation, and the soil deformation does not affect the stretching and drawing back of the measuring tube.
Example 2
A measuring method using an integrated monitoring device for osmotic pressure and settlement in a soft soil foundation comprises the following steps
a. Embedding a monitoring device at a designed position, injecting water into the measuring pipe water guide pipe until the water is flush with the pipe orifice, converting the vertical distance from the pipe orifice of the measuring pipe water guide pipe section to a sedimentation bottom plate by using an osmometer through measuring water pressure, taking the first measurement as an initial value H0, and taking the later measurement as a measured value H1;
b. and measuring the elevation of the pipe orifice of the water guide pipe section of the measuring pipe by using a leveling instrument, taking the first measurement as an initial value h0, taking the later measurement as a measured value h1, converting the elevation of the settlement bottom plate, and obtaining the difference value between the elevation and the initial value as the foundation settlement value.
Sedimentation amount s = (H0-H0) - (H1-H1);
c. before the vertical distance from the water injection measuring pipe orifice to the sedimentation bottom plate, measuring a water head hp of the osmometer, and converting the water pressure of a measuring point through leveling measurement;
water pressure Hp = Hp + (H1-H1).
Claims (2)
1. The utility model provides an osmotic pressure and settlement integration monitoring devices in soft soil foundation which characterized in that: the device comprises a measuring pipe, wherein the measuring pipe is divided into a measuring pipe permeable pipe and a measuring pipe water guide pipe, a sedimentation bottom plate is arranged between the measuring pipe permeable pipe and the measuring pipe water guide pipe, the bottom of the measuring pipe permeable pipe is sealed, a protection pipe is arranged on the outer side of the measuring pipe, the protection pipe comprises a protection pipe movable pipe and a protection pipe fixed pipe, the protection pipe movable pipe is arranged on the sedimentation bottom plate, an osmometer is arranged in the measuring pipe permeable pipe, and one end of the osmometer is connected with a cable; the water permeable pipe of the measuring pipe is provided with a plurality of holes, and the area of each hole accounts for 10% -20% of the surface area of the water permeable pipe of the measuring pipe; the exterior of the water permeable pipe of the measuring pipe is wrapped with two layers of non-woven geotextiles, and the osmometer is wrapped with two layers of geotextiles; the measuring pipe water guide pipe is a multi-section pipe, and an outer hoop joint is adopted among the multi-section pipes; the diameter of the water permeable pipe of the measuring pipe is larger than that of the water guide pipe of the measuring pipe.
2. A measuring method using the integrated monitoring device for the seepage pressure and settlement in the soft soil foundation of claim 1, characterized by comprising the following steps:
a. embedding a monitoring device at a designed position, injecting water into the measuring pipe water guide pipe until the water is flush with the pipe orifice, converting the vertical distance from the pipe orifice of the measuring pipe water guide pipe section to a sedimentation bottom plate by using an osmometer through measuring water pressure, taking the first measurement as an initial value H0, and taking the later measurement as a measured value H1;
b. measuring the elevation of the pipe orifice of the water guide pipe section of the measuring pipe by using a leveling instrument, taking the first measurement as an initial value h0, taking the later measurement as a measured value h1, converting the elevation of the settlement bottom plate, and taking the difference value between the elevation and the initial value as a foundation settlement value;
sedimentation amount s = (H0-H0) - (H1-H1);
c. before the vertical distance from the water injection measuring pipe orifice to the sedimentation bottom plate, measuring a water head hp of the osmometer, and converting the water pressure of a measuring point through leveling measurement;
water pressure Hp = Hp + (H1-H1).
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| CN201810926448.4A CN109029346B (en) | 2018-08-15 | 2018-08-15 | Integrated monitoring device and measuring method for osmotic pressure and settlement in soft soil foundation |
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| CN201810926448.4A CN109029346B (en) | 2018-08-15 | 2018-08-15 | Integrated monitoring device and measuring method for osmotic pressure and settlement in soft soil foundation |
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| CN109029346B true CN109029346B (en) | 2020-12-11 |
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| CN112880637A (en) * | 2021-02-02 | 2021-06-01 | 北京市水科学技术研究院 | Dual-purpose measuring point for underground hidden culvert engineering settlement deformation and underground water level monitoring |
| CN114622533B (en) * | 2022-02-21 | 2024-08-09 | 山东电力工程咨询院有限公司 | Recyclable layered sedimentation and pore water pressure monitoring device and method |
Citations (5)
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|---|---|---|---|---|
| US6983655B2 (en) * | 2004-04-14 | 2006-01-10 | Chia-Hung Liang | Vehicle cesspool lever sensor |
| CN1862237A (en) * | 2006-06-09 | 2006-11-15 | 河海大学 | Device and method for testing water level in vacuum prepressing foundation reinforced area |
| CN101430199A (en) * | 2007-11-05 | 2009-05-13 | 黄广军 | Method and apparatus for monitoring soft soil base sedimentation |
| CN105737938A (en) * | 2016-02-24 | 2016-07-06 | 石家庄铁道大学 | Underground water level and deep-seated displacement same-hole monitoring device |
| CN106643649A (en) * | 2016-12-19 | 2017-05-10 | 杭州久智自动化技术有限公司 | Method and device for measuring deep soil settlement and pore water pressure |
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- 2018-08-15 CN CN201810926448.4A patent/CN109029346B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6983655B2 (en) * | 2004-04-14 | 2006-01-10 | Chia-Hung Liang | Vehicle cesspool lever sensor |
| CN1862237A (en) * | 2006-06-09 | 2006-11-15 | 河海大学 | Device and method for testing water level in vacuum prepressing foundation reinforced area |
| CN101430199A (en) * | 2007-11-05 | 2009-05-13 | 黄广军 | Method and apparatus for monitoring soft soil base sedimentation |
| CN105737938A (en) * | 2016-02-24 | 2016-07-06 | 石家庄铁道大学 | Underground water level and deep-seated displacement same-hole monitoring device |
| CN106643649A (en) * | 2016-12-19 | 2017-05-10 | 杭州久智自动化技术有限公司 | Method and device for measuring deep soil settlement and pore water pressure |
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