CN106192970B - A kind of soil pressure testing device in situ and method - Google Patents
A kind of soil pressure testing device in situ and method Download PDFInfo
- Publication number
- CN106192970B CN106192970B CN201610549026.0A CN201610549026A CN106192970B CN 106192970 B CN106192970 B CN 106192970B CN 201610549026 A CN201610549026 A CN 201610549026A CN 106192970 B CN106192970 B CN 106192970B
- Authority
- CN
- China
- Prior art keywords
- flexible conduit
- transparent flexible
- rubber bag
- bag tank
- situ
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- E02D1/022—Investigation of foundation soil in situ before construction work by investigating mechanical properties of the soil
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Soil Sciences (AREA)
- Analytical Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (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)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
A kind of soil pressure testing device in situ and method, belong to underground engineering in-situ stress test device and method.Soil pressure testing device is by the steel loop provided with guide hole, positioning hole and connecting hole, full of the miniature rubber bag tank of band color liquid and transparent flexible conduit composition.Miniature rubber bag tank is tightly connected with transparent flexible conduit, and is connected by positioning hole with support frame.Transparent flexible conduit is passed through guide hole on steel loop and draws ground by multiple steel loops for being fixed with miniature rubber bag tank and transparent flexible conduit reinforcing bar connecting rod just ring string in series by the quantity of measuring point as needed.During earth pressure test in situ, the steel loop string of fixed rubber bag tank is put into and specified in drilling, measuring point soil pressure is obtained indirectly by observing liquid-column height in transparent flexible conduit.Its is simple in construction, easy to operate, and cost is low, and measuring accuracy is high, the accurate quick measure particularly suitable for supporting construction Soil Interface soil pressure in base pit engineering.
Description
Technical field
The present invention relates to a kind of soil pressure testing device in situ and method, and be particularly suitable for use in supporting knot in subterranean excavation engineering
The test of structure-soil contact face soil pressure.
Background technology
Grasping supporting construction-soil contact face load information, (soil pressure is advised along supporting construction distribution pattern and Temporal Evolution
Rule) it is the correct basis for carrying out support structure design and premise.Existing foundation ditch in-situ soil method for testing pressure have pneumatic control method,
Dossal method and the embedded method of drilling etc., measuring cell mainly has the structure types such as firm string formula, differential resistance type, resistance-strain type.
The accuracy of soil pressure measured result in situ is by Comprehensive Controls such as element measuring principle, construction interference and environmental factors.To shake
Exemplified by string formula soil pressure cell, its fundamental measurement element is made up of elastic membrane, string wire and coil, if measured medium is very loose,
Such as fluffing of moulding sand, weak soil, soil pressure measured value increases substantially close to actual value with measured medium rigidity, using hydraulic pressure or gas
Pressure demarcation parameters obtained carries out soil pressure measured data and calculates acquired results precision and credible will be drastically reduced by degree.
During method or the embedded soil pressure cell of dossal method being headed into using pneumatic control, the friction of reinforcing bar connecting rod cage and the wall of a borehole
Collision can cause soil pressure cell flexible sheet to overload and produce permanent deformation, and actual borehole tilts in addition and boring surface is coarse not
Flat, soil pressure cell contacts tightness degree with drilling wall and is difficult to obtain rationally effectively control.Although cast-in-situ bored pile pile is laggard
Boring method avoids the dry of uncertain factor in work progress and work progress to a certain extent behind row Pile-soil contact face
Disturb, but still rigidity mismatch problem caused by measuring cell itself can not be overcome, cause soil pressure measured result in situ from
Dissipate, support structure design load theory verify and further corrected perfect so as to hinder.
The content of the invention
The purpose of the present invention is to overcome weak point of the prior art, there is provided one kind makes simple, easy for installation, cost
It is cheap, rigidity mismatches and construction disturbance influences soil pressure testing device in situ and method can be overcome simultaneously.
To achieve the above object, soil pressure testing device in situ of the invention, including steel loop, the conduit that is located on steel loop
Hole, positioning hole and threaded connection hole, the middle part of the steel loop, which is provided with, is full of the miniature rubber bag tank with color liquid, miniature rubber bag tank
It is located at the support frame in positioning hole through leg to fix, the transparent flexible stretched into from guide hole is provided with the miniature rubber bag tank and is led
Pipe.
The present invention earth pressure test method be：
A. the number of measuring point as needed is by multiple steel loop reinforcing bars for being fixed with miniature rubber bag tank and transparent flexible conduit
Connecting rod just ring string in series, the both ends of reinforcing bar connecting rod are connected with the threaded connection hole screw thread on steel loop；
B. the firm ring string fixed is put into testing bore holes, the length of steel loop string is identical with testing bore holes depth；
C. the transparent flexible conduit of multiple measuring points on firm ring string is drawn into ground out of testing bore holes, and is fixed on conduit and consolidates
Determine on frame, then with sand filling testing bore holes；
D. point position soil pressure is calculated by p=ρ gh by observing band color liquid height in transparent flexible conduit；Formula
In：P represents soil pressure, kPa；ρ is fluid density；G is acceleration of gravity, 9.8N/kg；H is with color liquid height and position, m.
The center spacing of the steel loop is identical with design earth pressure measuring point spacing.
Beneficial effect, as a result of such scheme, the present invention is based on hydraulic transfering principle, will be filled with color liquid
Miniature rubber bag tank connects with transparent flexible conduit, and is fixed in the steel loop provided with guide hole, positioning hole and connecting hole, leads to
Cross liquid level indirect gain measuring point soil pressure in conduit so that the cost-effective reduction of soil pressure in-situ bioremediation, avoid soil pressure
Power box-surrounding medium rigidity mismatches the measurement error brought, and improves sensor and buries survival rate, is adapted to various geological conditions
The soil pressure actual measurement of supporting construction-soil contact face in deep basal pit.Particularly suitable for supporting construction in base pit engineering-Soil Interface soil pressure
The accurate quick measure of power.Its is simple in construction, easy to operate, and cost is cheap, good test effect, has in the art wide
General practicality.
Brief description of the drawings
Fig. 1 is the soil pressure testing device general structure profile in situ of the present invention.
Fig. 2 is the earth pressure test example structure schematic diagram in situ of this fermentation.
In figure：1- steel loops；2- flexible and transparent conduits；3- positioning holes；4- connecting holes；5- guide holes；The miniature glue of 6-
Capsule；7-reinforcing bar connecting rod；8- drills；9- ground；10- catheter-fixing racks；11- steel loop strings.
Embodiment
The invention will be further described for embodiment in below in conjunction with the accompanying drawings：
As shown in figure 1, soil pressure testing device in situ is mainly by steel loop 1, the guide hole being located on steel loop 15, positioning hole 3
With threaded connection hole 4, the middle part of the steel loop 1, which is provided with, is full of the miniature rubber bag tank 6 with color liquid, and miniature rubber bag tank 6 is through branch
The support frame that pin is located in positioning hole 3 is fixed, and the transparent flexible conduit stretched into from guide hole 5 is provided with the miniature rubber bag tank 6
2, it is full of in transparent flexible conduit 2 and identical band color liquid in miniature rubber bag tank 6.Band color is full of in miniature rubber bag tank 6
Liquid is simultaneously connected with transparent flexible conduit 2, is full of in transparent flexible conduit 2 and identical band color liquid in miniature rubber bag tank 6.
In-situ soil method for testing pressure is as follows：
A. the steel loop 1 provided with miniature rubber bag tank 6 and transparent flexible conduit 2 and reinforcing bar connecting rod 7 of the both ends with screw thread are gone here and there
Connection, the center spacing of steel loop 1 are identical with design earth pressure measuring point spacing；
B. the steel loop string 11 of the miniature rubber bag tank 6 of fixation is put into and specified in drilling 8, the length of steel loop string 11 and 8 depth of drilling
It is identical；
C. the transparent flexible conduit 2 of multiple measuring points on firm ring string 11 is drawn into ground 9 out of testing bore holes 8, and be fixed on
On catheter-fixing rack 10, then with sand filling testing bore holes 8；
D. soil deformation pressure passes to miniature rubber bag tank 6 by 8 medium-fine sands that drill, after miniature rubber bag tank 6 is squeezed,
Colored liquid is pressed into transparent flexible conduit 2 in miniature rubber bag tank 6, band color liquid in transparent flexible conduit 2
Height will change, and by observing band color liquid height in transparent flexible conduit 2, be calculated by formula p=ρ gh and obtain measuring point
Position soil pressure；In formula：P represents soil pressure, kPa；ρ is fluid density；G is acceleration of gravity, 9.8N/kg；H is band color liquid
Body height and position, m.
Claims (2)
1. a kind of in-situ soil method for testing pressure of soil pressure testing device in situ, soil pressure testing device in situ include steel loop
(1) guide hole (5), positioning hole (3) and the threaded connection hole (4), being located on steel loop (1), the middle part of the steel loop (1), which is provided with, to be filled
The miniature rubber bag tank (6) of filled band color liquid, miniature rubber bag tank (6) are located at the support frame in positioning hole (3) through leg and fixed, institute
State the transparent flexible conduit (2) for being provided with miniature rubber bag tank (6) and being stretched into from guide hole (5), be full of in transparent flexible conduit (2) with
Identical band color liquid in miniature rubber bag tank (6)；
It is characterised in that it includes following method：
A. the number of measuring point as needed uses multiple steel loops (1) for being fixed with miniature rubber bag tank (6) and transparent flexible conduit (2)
Reinforcing bar connecting rod (7) just ring string (11) in series, both ends and threaded connection hole (4) screw thread on steel loop (1) of reinforcing bar connecting rod (7)
It is connected；
B. the firm ring string (11) fixed is put into testing bore holes (8), length and testing bore holes (8) depth of steel loop string (11)
It is identical；
C. the transparent flexible conduit (2) of multiple measuring points on firm ring string (11) is drawn into ground (9) out of testing bore holes (8), and it is solid
It is scheduled on catheter-fixing rack (10), then with sand filling testing bore holes (8)；
D. highly point position soil pressure is calculated by p=ρ gh by observing band color liquid in transparent flexible conduit (2)；In formula：
P represents soil pressure, kPa；ρ is fluid density；G is acceleration of gravity, 9.8N/kg；H is with color liquid height and position, m.
2. in-situ soil method for testing pressure according to claim 1, it is characterised in that the center spacing of the steel loop (1)
It is identical with design earth pressure measuring point spacing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610549026.0A CN106192970B (en) | 2016-07-12 | 2016-07-12 | A kind of soil pressure testing device in situ and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610549026.0A CN106192970B (en) | 2016-07-12 | 2016-07-12 | A kind of soil pressure testing device in situ and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106192970A CN106192970A (en) | 2016-12-07 |
| CN106192970B true CN106192970B (en) | 2018-02-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610549026.0A Expired - Fee Related CN106192970B (en) | 2016-07-12 | 2016-07-12 | A kind of soil pressure testing device in situ and method |
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| Country | Link |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112629735B (en) * | 2020-12-10 | 2022-11-29 | 西南交通大学 | Three-dimensional soil pressure measuring device for model test and using method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010196352A (en) * | 2009-02-25 | 2010-09-09 | Masuda Giken:Kk | Method and device for measuring coefficient of earth pressure at rest of ground |
| CN202139619U (en) * | 2011-06-22 | 2012-02-08 | 西安长庆科技工程有限责任公司 | Hanging device for pressure cell |
| CN202298594U (en) * | 2011-09-07 | 2012-07-04 | 华侨大学 | Soil mass pressure test instrument |
| CN202390822U (en) * | 2011-11-25 | 2012-08-22 | 华侨大学 | Pressure test device for soil body |
| CN104060598A (en) * | 2014-06-27 | 2014-09-24 | 西南交通大学 | Fixing device of vertically arranged soil pressure cell |
-
2016
- 2016-07-12 CN CN201610549026.0A patent/CN106192970B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010196352A (en) * | 2009-02-25 | 2010-09-09 | Masuda Giken:Kk | Method and device for measuring coefficient of earth pressure at rest of ground |
| CN202139619U (en) * | 2011-06-22 | 2012-02-08 | 西安长庆科技工程有限责任公司 | Hanging device for pressure cell |
| CN202298594U (en) * | 2011-09-07 | 2012-07-04 | 华侨大学 | Soil mass pressure test instrument |
| CN202390822U (en) * | 2011-11-25 | 2012-08-22 | 华侨大学 | Pressure test device for soil body |
| CN104060598A (en) * | 2014-06-27 | 2014-09-24 | 西南交通大学 | Fixing device of vertically arranged soil pressure cell |
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| Publication number | Publication date |
|---|---|
| CN106192970A (en) | 2016-12-07 |
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