CN105421324B - Burying method for pore water pressure gauges - Google Patents
Burying method for pore water pressure gauges Download PDFInfo
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- CN105421324B CN105421324B CN201510757025.0A CN201510757025A CN105421324B CN 105421324 B CN105421324 B CN 105421324B CN 201510757025 A CN201510757025 A CN 201510757025A CN 105421324 B CN105421324 B CN 105421324B
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- pressure gauge
- pore pressure
- paper bag
- sleeve pipe
- clay ball
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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
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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)
- Measuring Fluid Pressure (AREA)
Abstract
The invention discloses a burying method for pore water pressure gauges. The burying method includes the steps that 1, a hole is drilled or a sleeve is buried in a predetermined position; 2, clay ball paper bags are manufactured according to the diameter of the drilled hole or the sleeve, meanwhile, the drilled hole or the sleeve are cleaned, and the clay ball paper bags are made of drawing paper soluble in water; 3, one pore water pressure gauge is placed in the drilled hole or the sleeve and located below a specified depth; 4, filter materials are guided into the drilled hole or the sleeve, and the pore water pressure gauge is lifted to the specified depth after 5-6 minutes; 5, one clay ball paper bag is placed into the drilled hole or the sleeve and sinks completely to form a clay layer; and 6, the step 3 to the step 5 are repeated until all the pore water pressure gauges are buried. According to the method, the burying quality of the pore water pressure gauges can be ensured through the clay ball paper bags, distortion of test data is avoided, and engineering quality is ensured.
Description
Technical field
The present invention relates to manufacture field of constructing, more particularly to a kind of pore pressure gauge method for embedding.
Background technology
Pore pressure gauge is also commonly referred to as osmometer, is for measuring saturated clay pore water pressure or osmotic pressure
Instrumentation.Measured pore water pressure controls the speed constructed plus cut out to analyze ground rate of consolidation, it is ensured that construction
The stability of phase embankment.Due to the embedded accuracy rate for being related to long-term observation of pore pressure gauge, it is therefore necessary to according to《Hole
Water pressure test procedure》CECS55：93 Hes《Safety monitoring of earth-rockfill dams technical specification》SL551-2012 etc. requires embedded.
Taking drilling embedded pore pressure gauge, its program is first to drill and setting of casing in precalculated position, is got into than setting more
At meter depth depth 20cm, drilling rod is extracted, instrument wire is penetrated into drilling rod, pulled out from the other end.The input clay mud ball in drilling
Tamping, as Sub-sealing Course.And appropriate coarse sand is put into as lower filtering layer, then pore pressure gauge is sent to into pre- buried depth with drilling rod
Degree, then slowly lifts sleeve pipe, makes pore pressure gauge remove sleeve pipe, now continues to put into appropriate coarse sand, uses surrounding equipment
Sand is filled, and as filter layer, then puts into clay ball tamping as upper sealing, side tamping of backmost banketing, while sleeve pipe is carried, until boring
Aperture, finally introduces observation case by test lead, is observed.
According to the method described above, in the case of hole wall or sleeve pipe also have the heavy what of a small amount of or nothing and thick slurry, the clay ball meeting poured into
Rapidly dissolving, becomes mud (more than the proportion of medium coarse sand, gravelly sand etc.), and clay ball can be condensed in sinking watching
Group, swims in hole.The way taken at present is smash with long waddy etc., but in the case where clay ball meets water, can more be smash more
It is real, even if pouring into, block stone is also of no avail, eventually form the situation for all not backfilling filter material up and down, in this case, pore water
Even if pressure gauge is embedded completing, data also greatly distortion out is tested, so as to affect construction quality.
The content of the invention
The present invention provides a kind of pore pressure gauge method for embedding, is asked with solving above-mentioned technology present in prior art
Topic.
To solve above-mentioned technical problem, the present invention provides a kind of pore pressure gauge method for embedding, including：
Step 1：Drill in precalculated position or bury sleeve pipe；
Step 2：Drilling or sleeve pipe, the clay ball are cleaned according to the aperture manufacture clay ball paper bag of drilling or sleeve pipe simultaneously
Paper bag is using the drawing paper for being dissolved in water；
Step 3：Pore pressure gauge is put in drilling or sleeve pipe, the pore pressure gauge is located under prescribed depth
Side；
Step 4：Filter material is imported in drilling or sleeve pipe, the pore pressure gauge is lifted after 5-6min to regulation depth
Degree；
Step 5：The clay ball paper bag is put into into drilling or sleeve pipe to sinking completely, argillic horizon is formed；
Step 6：Repeat step 3 is to step 5 until completing the embedded work of all pore pressure gauges.
Preferably, the clay ball paper bag coordinates with the drilling or shell clearance.
Preferably, the height of the clay ball paper bag is 50cm~100cm.
Preferably, the manufacture method of the clay ball paper bag is：The aperture of drilling or sleeve pipe is calculated, clay ball paper is determined
The diameter of bag；Prepare drawing paper and be rolled into the drawing paper cylindric；One end of closed cylindric paper bag, and from the other end
Load clay ball；The other end of closed cylindric paper bag is so as to completing the making of clay ball paper bag.
Preferably, using the closed cylindric paper bag of adhesive tape or stapler.
Preferably, in step 3, the pore pressure gauge is located at 1~2m of prescribed depth lower section.
Preferably, in step 3, at the body of the pore pressure gauge and conductive cable contacts position jag is provided with.
Preferably, the filter material is the shiver stone of medium coarse sand, gravelly sand or particle diameter less than 10mm；The thickness of the filter material
Spend for 60~100cm.
Preferably, the thickness of argillic horizon is not less than 100cm in the step 5.
Preferably, in step 6, after completing all embedded action of all pore pressure gauges, making drilling or sleeve pipe most
The argillic horizon on upper strata thickens 1~2m.
Compared with prior art, the present invention has advantages below：
1st, the present invention utilizes clay ball paper bag so that clay ball directly contact with water, while being melted slowly, being had one using chance water
Determine the drawing paper of toughness etc., it is to avoid drawing paper affects the accuracy of measurement of follow-up pore pressure gauge, it is ensured that construction quality, close
Lattice rate reaches 99.9-100%.
2nd, burying pore water pressure timing will not be damaged；
3rd, suit measures to local conditions, clay ball paper bag can be made with the cohesive soil for air-drying or drying, 50% cost can be saved；
4th, saved the time on the premise of burying pore pressure gauge by code, specification, needed just can complete in the past within 1 day, it is existing
Only needing to 1 hour.
Description of the drawings
Fig. 1 is the schematic flow sheet of the pore pressure gauge method for embedding of the present invention；
Fig. 2 is the structural representation after the completion of the pore pressure gauge of the present invention is buried.
Specific embodiment
It is understandable to enable the above objects, features and advantages of the present invention to become apparent from, below in conjunction with the accompanying drawings to the present invention
Specific embodiment be described in detail.It should be noted that, accompanying drawing of the present invention is in the form of simplification and using non-essence
Accurate ratio, only to purpose that is convenient, lucidly aiding in illustrating the embodiment of the present invention.
As depicted in figs. 1 and 2, the present invention provides a kind of pore pressure gauge method for embedding, including：
Step 1：Drill in precalculated position or bury sleeve pipe, generally drilling or sleeve pipe 10 can be through analysis layers of sand 200 to becoming silted up
In shale soil layer 100, and pore pressure gauge mostly 20 is located in silt soil strata 100；
Step 2：According to the aperture manufacture clay ball paper bag of drilling or sleeve pipe 10, while cleaning drilling or sleeve pipe 10, water is used
Heavy what and thick slurry drilling or in sleeve pipe 10 is all cleaned out, and carries brill；Further, because drilling fluid has many use to have
The chemical article of severe corrosive, cleaning step is requisite, therefore the step 2 of the present invention can be with original cleaning step
Synchronously carry out, with cost-effective and improve efficiency.
Preferably, the manufacturing step of the clay ball paper bag includes：
First, the aperture of drilling or sleeve pipe 10 is calculated, the diameter of clay ball paper bag is determined；
Then, prepare drawing paper and be rolled into the drawing paper cylindric, the diameter of the cylindric paper bag is slightly less than drilling
Or the aperture of sleeve pipe 10, for example：Aperture is 110mm, a diameter of 100mm of cylindric paper bag of making；Such as aperture 130mm, system
The a diameter of 120mm of cylindric paper bag for making；In other words, the clay ball paper bag after the completion of manufacture with it is described drilling or sleeve pipe 10
Gap coordinates, it can be ensured that the clay ball paper bag smoothly can fall corresponding position down.
Then, using one end of the closed cylindric paper bag of adhesive tape or stapler, and clay ball is loaded from the other end；
The other end of adhesive tape or the closed cylindric paper bag of stapler is reused so as to complete the making of clay ball paper bag.System
The clay ball paper bag after the completion of making is a complete cylinder, and the height of the cylinder is 50cm~100cm, so may be used
To guarantee that clay ball paper bag is consistent with the perpendicularity of drilling or sleeve pipe 10.
Step 3：Pore pressure gauge 20 is put in drilling or sleeve pipe 10, it is deep that the pore pressure gauge 20 is located at regulation
Degree lower section, is particularly located at prescribed depth lower section 1~2m places, this is because drilling or sleeve pipe 10 wash again totally, also have big
The gravelly sand or clay of grain sinks to bottom, can so protect pore pressure gauge 20.
Step 4：Filter material 30 is imported in drilling or sleeve pipe 10, after treating that 5-6min, the filter material 30 are stable, lifts institute
Pore pressure gauge 20 is stated to prescribed depth, preferably, at the contact position of the body of the pore pressure gauge and cable 50
Jag is provided with, the jag may insure when pore pressure gauge 20 are carried up and down, only cable 50 is exerted oneself, pore water pressure
Meter 20 and the contact site of cable 50 do not exert oneself, it is to avoid the pore pressure machine 20 is with the contact position of cable 50 because pulling force is excessive
And damage；Preferably, the filter material 30 is the shiver stone of medium coarse sand, gravelly sand or particle diameter less than 10mm；The filter material 30
Thickness be 60~100cm.
Step 5：The clay ball paper bag is put into into drilling or sleeve pipe 10, because the proportion of water is far smaller than clay ball paper bag
Proportion, therefore the clay ball paper bag can sink rapidly, guarantee that clay ball paper bag is complete with the bubble in invisible water
Sink, form argillic horizon 40；This step is carried out if in sleeve pipe, it is also possible to is above carried sleeve pipe, but should not be proposed excessive.
Preferably, the thickness of the argillic horizon 30 is not less than 100cm, therefore, the clay ball being put into is needed in this step
Paper bag number is at least 2.
Step 6：Repeat step 3 is to step 5 until completing the embedded work of all pore pressure gauges 20.As shown in Fig. 2
The number of the pore pressure gauge 20 in the present embodiment is 3, therefore, step 3-5 need to be repeated altogether 3 times.
Further, after all embedded actions of all pore pressure gauges 20 are completed, to guarantee stability, need to also be
Increase thickness on the argillic horizon 40 of drilling or the superiors of sleeve pipe 10, specifically thicken 1~2m.
In sum, pore pressure gauge method for embedding of the invention, including：Step 1：Drill in precalculated position or embedded
Sleeve pipe；Step 2：Drilling or sleeve pipe, the clay ball are cleaned according to the aperture manufacture clay ball paper bag of drilling or sleeve pipe 10 simultaneously
Paper bag is using the drawing paper for being dissolved in water；Step 3：Pore pressure gauge 20, the pore water pressure are put in drilling or sleeve pipe 10
Power meter 20 is located at prescribed depth lower section；Step 4：Filter material 30 is imported in drilling or sleeve pipe 10, the hole is lifted after 5-6min
Gap WG 20 is to prescribed depth；Step 5：The clay ball paper bag is put into into drilling or sleeve pipe 10 to sinking completely, is formed
Argillic horizon 40；Step 6：Repeat step 3 is to step 5 until completing the embedded work of all pore pressure gauges 20.The present invention is logical
Cross and the embedded quality that clay ball paper bag may insure pore pressure gauge be set, it is to avoid test data distortion out, it is ensured that
Construction quality.
Obviously, those skilled in the art can carry out the spirit of various changes and modification without deviating from the present invention to invention
And scope.So, if these modifications of the present invention and modification belong to the claims in the present invention and its equivalent technologies scope it
Interior, then the present invention is also intended to including including these changes and modification.
Claims (10)
1. a kind of pore pressure gauge method for embedding, it is characterised in that include：
Step 1：Drill in precalculated position or bury sleeve pipe；
Step 2：Drilling or sleeve pipe, the clay ball paper bag are cleaned according to the aperture manufacture clay ball paper bag of drilling or sleeve pipe simultaneously
Using the drawing paper for being dissolved in water；
Step 3：Pore pressure gauge is put in drilling or sleeve pipe, the pore pressure gauge is located at prescribed depth lower section；
Step 4：Filter material is imported in drilling or sleeve pipe, the pore pressure gauge is lifted after 5-6min to prescribed depth；
Step 5：The clay ball paper bag is put into into drilling or sleeve pipe to sinking completely, argillic horizon is formed；
Step 6：Repeat step 3 is to step 5 until completing the embedded work of all pore pressure gauges.
2. pore pressure gauge method for embedding as claimed in claim 1, it is characterised in that the clay ball paper bag and the brill
Hole or shell clearance coordinate.
3. pore pressure gauge method for embedding as claimed in claim 1, it is characterised in that the height of the clay ball paper bag is
50cm~100cm.
4. pore pressure gauge method for embedding as claimed in claim 1, it is characterised in that the manufacturer of the clay ball paper bag
Method is：The aperture of drilling or sleeve pipe is calculated, the diameter of clay ball paper bag is determined；Prepare drawing paper and the drawing paper is rolled into into circle
Column；One end of closed cylindric paper bag, and load clay ball from the other end；The other end of closed cylindric paper bag is so as to complete
Into the making of clay ball paper bag.
5. pore pressure gauge method for embedding as claimed in claim 4, it is characterised in that closed using adhesive tape or stapler
The cylindric paper bag.
6. pore pressure gauge method for embedding as claimed in claim 1, it is characterised in that in step 3, the pore water pressure
Meter is located at 1~2m of prescribed depth lower section.
7. pore pressure gauge method for embedding as claimed in claim 1, it is characterised in that in step 3, the pore water pressure
Jag is provided with the body of meter and conductive cable contacts position.
8. pore pressure gauge method for embedding as claimed in claim 1, it is characterised in that the filter material is medium coarse sand, gravel
The shiver stone of sand or particle diameter less than 10mm；The thickness of the filter material is 60~100cm.
9. pore pressure gauge method for embedding as claimed in claim 1, it is characterised in that the thickness of argillic horizon in the step 5
Degree is not less than 100cm.
10. pore pressure gauge method for embedding as claimed in claim 1, it is characterised in that in step 6, complete all holes
After all embedded action of WG, drilling or the argillic horizon of the sleeve pipe the superiors is set to thicken 1~2m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510757025.0A CN105421324B (en) | 2015-11-09 | 2015-11-09 | Burying method for pore water pressure gauges |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510757025.0A CN105421324B (en) | 2015-11-09 | 2015-11-09 | Burying method for pore water pressure gauges |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105421324A CN105421324A (en) | 2016-03-23 |
| CN105421324B true CN105421324B (en) | 2017-05-17 |
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ID=55499836
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510757025.0A Active CN105421324B (en) | 2015-11-09 | 2015-11-09 | Burying method for pore water pressure gauges |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107421671A (en) * | 2017-09-08 | 2017-12-01 | 浙江省水利水电勘测设计院 | A kind of pressure gauge placing device for gentle slope inclined shaft |
| 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 |
| CN109183770B (en) * | 2018-08-28 | 2021-08-13 | 中国二十冶集团有限公司 | Installation method of pore water pressure meter in soft foundation area |
| CN112665899A (en) * | 2020-11-23 | 2021-04-16 | 天津市地球物理勘探中心 | Sampling method suitable for loose sand, clay layer soil sample and pore water |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2243804A (en) * | 1990-03-06 | 1991-11-13 | Naue Fasertechnik | A water and/or oil-impermeable sealing mat |
| CN2777042Y (en) * | 2005-03-31 | 2006-05-03 | 广州四航工程技术研究院 | Hole sealing apparatus for burying single-hole and multiple hole pressure meter |
| CN103195046B (en) * | 2013-03-25 | 2015-08-26 | 长沙理工大学 | An a kind of hole concrete dynamic modulus WG method for embedding |
| CN103792292B (en) * | 2014-01-27 | 2016-05-11 | 中国矿业大学 | A kind of relaxation zone ultrasound probe header coupling process |
| CN104805822B (en) * | 2015-04-03 | 2016-06-08 | 水利部交通运输部国家能源局南京水利科学研究院 | The pre-buried fixing device of single hole multiple spot pore pressure gauge and method for embedding thereof |
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