CN108729430A - A kind of silting blocking type hole pressure meter and application method - Google Patents

A kind of silting blocking type hole pressure meter and application method Download PDF

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Publication number
CN108729430A
CN108729430A CN201810365427.XA CN201810365427A CN108729430A CN 108729430 A CN108729430 A CN 108729430A CN 201810365427 A CN201810365427 A CN 201810365427A CN 108729430 A CN108729430 A CN 108729430A
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China
Prior art keywords
silting
pressure meter
pore
type hole
blocking type
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CN201810365427.XA
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CN108729430B (en
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刘坚
陈大硕
吴跃东
陈锐
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Hohai University HHU
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Hohai University HHU
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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D1/00Investigation of foundation soil in situ

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Soil Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

A kind of silting blocking type hole pressure meter of present invention offer and application method, belong to measuring device field.Including pressure sensor, as basic pore pressure measuring cell, it is connect with data collecting instrument signal by conducting wire on pressure sensor;Head cover made of one hard material, is installed on pressure sensor, which is buckled in the inductive probe seal closure of pressure sensor in one cavity, which is in communication with the outside by several ducts being arranged in head cover;Further include inverse-washing system, the inverse-washing system includes water pump, and the water pump is connected to by a pipeline with one or more in several ducts on head cover, and valve is equipped on pipeline.A kind of silting blocking type hole pressure meter of the present invention, can avoid pore pressure meter and measurement error caused by silting occurs.

Description

A kind of silting blocking type hole pressure meter and application method
Technical field
The present invention relates to a kind of measuring device more particularly to a kind of silting blocking type hole pressure meter and its application methods.
Background technology
Pore pressure meter is a kind of sensor of embedment inside soil body measurement pore water pressure, by pressure sensor and permeable stone etc. Component forms, and is mainly used in the measurement of soil body pore water pressure inside the works such as earth and rockfill dam, earth embankment and side slope.Based on pore pressure Measuring principle is counted, patent CN101655405A is proposed shows water pressure by transparent glass tube, measures the hole of soil body depths Gap water pressure.Based on multiple traditional pore pressure meters, patent CN203498817U proposes a kind of serial-type pore water pressure measuring device, It can measure different depth pore water pressure.But the studies above does not consider the case where permeable block.At complicated scene In condition, permeable component(Permeable stone)In the long-term use, hole is blocked by fine particle, makes permeable component silting, Influence the accuracy that pore pressure meter measures.
Invention content
In view of the above technical problems, the present invention proposes a kind of silting blocking type hole pressure meter, can avoid pore pressure meter generation silting and makes At measurement error.
In order to achieve the above technical purposes, the present invention adopts the following technical scheme that:
A kind of silting blocking type hole pressure meter, including pressure sensor, as basic pore pressure measuring cell, by leading on pressure sensor Line is connect with data collecting instrument signal;
Head cover made of one hard material, is installed on pressure sensor, which seals the inductive probe of pressure sensor Cover is buckled in a cavity, which is in communication with the outside by several ducts being arranged in head cover;
Further include inverse-washing system, the inverse-washing system includes water pump, the water pump by a pipeline with it is several on head cover One or more connection in duct is equipped with valve on pipeline.
The head cover is equipped with a permeable component, if pore water in the soil body is by inside the permeable component and head cover A dry duct is connected.
The permeable component is made of hole through material, and the pore diameter in permeable component is small gradually in the big one end in one end Miniature, the pore diameter that the cavity side is closed on permeable component is big, and the pore diameter far from cavity side is small.
The inductive probe of the pressure sensor is tightly connected by an O-ring seal and the cavity wall of the cavity.
The diameter range in the duct is 0.5 mm ~ 10mm.
The water pump is two way water pump.
The application method of the silting blocking type hole pressure meter, includes the following steps:
Step 1:Silting blocking type hole pressure meter is embedded in setting position, by the data collecting instrument and pressure sensor Connection;
Step 2:The valve is opened, pumping for water pump is opened;
Step 3:After several ducts and cavity are full of by water, valve and water pump are closed;
Step 4:Turn-on data Acquisition Instrument starts pore pressure and measures;
Step 5:Silting inspection is carried out to pore pressure meter at regular intervals;
Step 6:When the duct generation silting problem in head cover, the valve is opened, the pump operation is opened, at this point, The rotation direction when rotation direction and step 2 of water pump on the contrary, realize by the silting in head cover surface and head cover internal gutter into Row washes away, and silting closes valve and water pump after solving, and carries on pore pressure measurement.
Pore pressure meter silting inspection is judged by pore pressure change, and 50cm deep water is poured into pore pressure meter by the pipeline Amount illustrates pore pressure meter silting if pore pressure meter reading increases 50cm.
Advantageous effect:
A kind of silting blocking type hole pressure meter of the present invention, has the advantages that based on existing pore pressure:
The present invention provides a kind of silting blocking type hole pressure meter and application methods, by the flushing system, using hydraulic pressure to described Permeable component is washed away, and solves the problems, such as the block of the permeable component, be can avoid pore pressure meter and is occurred to measure mistake caused by silting Difference.
Description of the drawings
The present invention is further described with practice mode below in conjunction with the accompanying drawings.
Fig. 1 is a kind of silting blocking type hole pressure meter schematic diagram.
The permeable components of 1- in figure, 2- head covers, 3-O type sealing rings, 4- pressure sensors, 5- cables, 6- data collecting instruments, 7- Cavity, the ducts 8-, 9- valves, 10- water pumps.
Specific implementation mode
A kind of technical solution of present invention silting blocking type hole pressure meter is made with specific embodiment with reference to the accompanying drawings of the specification It is further described.
The permeable component of traditional pore pressure meter in the case of long-term use, is easy to cause permeable component overhead gap by fine grained Object blocks, and makes permeable component silting, and then make pore pressure meter failure.The novel pore pressure meter utilizes water by the flushing system Pressure washes away the permeable component, solves the problems, such as the block of the permeable component.
Embodiment 1
As shown in Figure 1, the present invention proposes a kind of silting blocking type hole pressure meter, including pore pressure meter ontology, flushing system and acquisition system, The pore pressure meter ontology includes permeable component 1, head cover 2, O-shaped rubber ring 3, pressure sensor 4 and data collecting instrument 6, described Head cover 2 is equipped with perforative duct 8, and the permeable component 1 is installed on the outside of the head cover 2, and the pressure sensor 4 is located at institute In the cavity 7 for stating 2 inside of head cover, pressure sensor 4 and the cavity wall of the cavity 7 pass through the O-shaped rubber ring 3 It is connected.
The flushing system includes valve 9 and water pump 10, the duct 8 and the permeable component 1, cavity 7, valve Door 9 is connected with water pump 10.
The permeable component 1 is that hole runs through material, and nearly cavity side hole is small, and other side hole is big, saturating Anti-filter effect is formed in wet part.
Gap between 7 inner surface of the cavity and the inductive probe outer surface of the pressure sensor 4 is more than 0.3mm, Gap between certain 4 outer surface of 7 inner surface of cavity and the pressure sensor can be 0.3mm to 10mm, as preferred Mode, the gap between 5 outer surface of 7 inner surface of cavity and the pressure sensor are 4mm.
As the further preferred of technical solution of the present invention, a diameter of 0.5 ~ 10 mm in the duct 8, as preferred side Formula, a diameter of 2mm in the duct 8.
As the further preferred of technical solution of the present invention, the pressure sensor 4 is connected to described by cable 5 Data collecting instrument 6.
The present invention also provides a kind of application methods of silting blocking type hole pressure meter, which is characterized in that including:
Step 1:Silting blocking type hole pressure meter is embedded in setting position, by the data collecting instrument and pressure sensor Connection;
Step 2:The valve is opened, pumping for water pump is opened;
Step 3:After several ducts and cavity are full of by water, valve and water pump are closed;
Step 4:Turn-on data Acquisition Instrument starts pore pressure and measures;
Step 5:Silting inspection is carried out to pore pressure meter at regular intervals;
Step 6:When the duct generation silting problem in head cover, the valve is opened, the pump operation is opened, at this point, The rotation direction when rotation direction and step 2 of water pump on the contrary, realize by the silting in head cover surface and head cover internal gutter into Row washes away, and silting closes valve and water pump after solving, and carries on pore pressure measurement.
Pore pressure meter silting inspection can be judged by pore pressure change, pour into 50cm depths into pore pressure meter by the pipeline Water illustrates pore pressure meter silting if pore pressure meter reading increases 50cm.
Embodiment 2
Certainly, heretofore described water pump can also use one-way water pump.When using one-way water pump, the silting blocking type hole The application method for pressing meter, includes the following steps:
Step 1:Silting blocking type hole pressure meter is embedded in setting position, by the data collecting instrument and pressure sensor Connection;
Step 2:The valve is opened, the water pump is disconnected, the pore water in the extraneous soil body passes through several in head cover Duct slowly enters cavity, is then turned off the valve, connects the water pump;
Step 3:Turn-on data Acquisition Instrument starts pore pressure and measures;
Step 4:When the duct generation silting problem in head cover, the valve is opened, the pump operation is opened, passes through The silting in head cover surface and head cover internal gutter is washed away in the operating of water pump, and silting closes valve and water pump after solving, Carry on pore pressure measurement.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that The specific implementation of the present invention is confined to these explanations.For those of ordinary skill in the art to which the present invention belongs, exist Under the premise of not departing from present inventive concept, a number of simple deductions or replacements can also be made, all shall be regarded as belonging to the present invention's Protection domain.

Claims (8)

1. a kind of silting blocking type hole pressure meter, including pressure sensor pass through as basic pore pressure measuring cell on pressure sensor Conducting wire is connect with data collecting instrument signal;
Head cover made of one hard material, is installed on pressure sensor, which seals the inductive probe of pressure sensor Cover is buckled in a cavity, which is in communication with the outside by several ducts being arranged in head cover;
It is characterized in that, further including inverse-washing system, the inverse-washing system includes water pump, and the water pump passes through a pipeline and top One or more in several ducts covered is connected to, and valve is equipped on pipeline.
2. silting blocking type hole pressure meter according to claim 1, which is characterized in that the head cover is equipped with a permeable component, Pore water in the soil body is connected by the permeable component with several ducts inside head cover.
3. silting blocking type hole pressure meter according to claim 2, which is characterized in that the permeable component runs through material by hole It is made, the pore diameter in permeable component is in the small gradual shrinkage in the big one end in one end, closes on the cavity side on permeable component Pore diameter is big, and the pore diameter far from cavity side is small.
4. silting blocking type hole pressure meter according to claim 1, which is characterized in that the inductive probe of the pressure sensor is logical The cavity wall for crossing an O-ring seal and the cavity is tightly connected.
5. silting blocking type hole pressure meter according to claim 1, which is characterized in that the diameter range in the duct is 0.5 mm ~10mm。
6. silting blocking type hole pressure meter according to claim 1, which is characterized in that the water pump is two way water pump.
7. the application method of silting blocking type hole pressure meter according to claim 1, which is characterized in that include the following steps:
Step 1:Silting blocking type hole pressure meter is embedded in setting position, by the data collecting instrument and pressure sensor Connection;
Step 2:The valve is opened, pumping for water pump is opened;
Step 3:After several ducts and cavity are full of by water, valve and water pump are closed;
Step 4:Turn-on data Acquisition Instrument starts pore pressure and measures;
Step 5:Silting inspection is carried out to pore pressure meter at regular intervals;
Step 6:When the duct generation silting problem in head cover, the valve is opened, the pump operation is opened, at this point, The rotation direction when rotation direction and step 2 of water pump on the contrary, realize by the silting in head cover surface and head cover internal gutter into Row washes away, and silting closes valve and water pump after solving, and carries on pore pressure measurement.
8. the application method of silting blocking type hole pressure meter according to claim 7, which is characterized in that pore pressure meter silting inspection is logical It crosses pore pressure change to be judged, pours into 50cm deep water amounts into pore pressure meter by the pipeline, if pore pressure meter reading increases 50cm then illustrates pore pressure meter silting.
CN201810365427.XA 2018-04-23 2018-04-23 anti-clogging hole pressure gauge and using method Active CN108729430B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116558696A (en) * 2023-07-11 2023-08-08 中铁十四局集团大盾构工程有限公司 Water and soil pressure monitoring system and method for shield construction process

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101655405A (en) * 2009-09-21 2010-02-24 天津大学 Pore water pressure gauge and use method thereof
CN202247833U (en) * 2011-09-10 2012-05-30 无锡市政设计研究院有限公司 Device for measuring and monitoring underground water pressure
CN102590063A (en) * 2012-02-22 2012-07-18 吉林大学 Test device and test method for penetration clogging of soil
CN203083768U (en) * 2013-01-30 2013-07-24 武汉宇观通信技术有限公司 Anti-blocking structure of pore water pressure gauge
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
CN103821183A (en) * 2012-11-16 2014-05-28 同济大学 Testing apparatus for simulating phenomenon and law of soil heave-piping failure
CN203772699U (en) * 2014-04-16 2014-08-13 吉林大学 Three-dimensional penetration siltation simulated test device of dam foundation soil body
CN104790442A (en) * 2015-05-05 2015-07-22 温州大学 Large-sized testing device of model test for treating soft soil foundation by vacuum preloading method and testing method thereof
EP2657668B1 (en) * 2012-04-28 2016-09-07 Dec N.V. (Deme Environmental Contractors) Method and Device for determining the hydrostatic pressure in a liquid mass
CN207081510U (en) * 2017-07-17 2018-03-09 中国工程物理研究院总体工程研究所 A kind of miniature positive/negative-pressure measurement pore water pressure sensor

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101655405A (en) * 2009-09-21 2010-02-24 天津大学 Pore water pressure gauge and use method thereof
CN202247833U (en) * 2011-09-10 2012-05-30 无锡市政设计研究院有限公司 Device for measuring and monitoring underground water pressure
CN102590063A (en) * 2012-02-22 2012-07-18 吉林大学 Test device and test method for penetration clogging of soil
EP2657668B1 (en) * 2012-04-28 2016-09-07 Dec N.V. (Deme Environmental Contractors) Method and Device for determining the hydrostatic pressure in a liquid mass
CN103821183A (en) * 2012-11-16 2014-05-28 同济大学 Testing apparatus for simulating phenomenon and law of soil heave-piping failure
CN203083768U (en) * 2013-01-30 2013-07-24 武汉宇观通信技术有限公司 Anti-blocking structure of pore water pressure gauge
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
CN203772699U (en) * 2014-04-16 2014-08-13 吉林大学 Three-dimensional penetration siltation simulated test device of dam foundation soil body
CN104790442A (en) * 2015-05-05 2015-07-22 温州大学 Large-sized testing device of model test for treating soft soil foundation by vacuum preloading method and testing method thereof
CN207081510U (en) * 2017-07-17 2018-03-09 中国工程物理研究院总体工程研究所 A kind of miniature positive/negative-pressure measurement pore water pressure sensor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116558696A (en) * 2023-07-11 2023-08-08 中铁十四局集团大盾构工程有限公司 Water and soil pressure monitoring system and method for shield construction process
CN116558696B (en) * 2023-07-11 2023-09-26 中铁十四局集团大盾构工程有限公司 Water and soil pressure monitoring system and method for shield construction process

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