CN110346068A - A kind of layer-stepping resistance to shear of soil and settlement measuring device and measurement method - Google Patents
A kind of layer-stepping resistance to shear of soil and settlement measuring device and measurement method Download PDFInfo
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- CN110346068A CN110346068A CN201910694955.4A CN201910694955A CN110346068A CN 110346068 A CN110346068 A CN 110346068A CN 201910694955 A CN201910694955 A CN 201910694955A CN 110346068 A CN110346068 A CN 110346068A
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- soil
- tulwar
- embedded
- shear
- layer
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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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/26—Auxiliary measures taken, or devices used, in connection with the measurement of force, e.g. for preventing influence of transverse components of force, for preventing overload
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (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
The invention discloses a kind of layer-stepping resistance to shear of soil and settlement measuring devices, comprising: soil pressure cell, fixed steel bars hole, hollow bushing component, embedded tulwar and displacement meter, metallic channel are equipped with entrance hole, top equipped with outlet hole in the side wall of hollow bushing；Hollow bushing component is fixed in fixed steel bars hole；Embedded tulwar is connect with hollow bushing, and embedded tulwar is equipped with soil pressure cell；The quantity of displacement meter is adapted with hollow bushing quantity and metering contact is connected in capping or rotating handle.Additionally provide it is a kind of stretch hollow pipe according to experimental program, flush embedded tulwar with point position, rotating handle is to drive tulwar to be inserted into the test method of soil layer.Beneficial effect is: measurement is more convenient, accurate and efficient；The measurement of vertical direction multiple spot, records stress and settlement values of the soil body in longitudinal depth, provides foundation for research stress and the changing rule for being deposited in vertical direction.
Description
Technical field
The invention belongs to in-situ testing technique field on site, in particular to a kind of resistance to shear of soil and settlement measuring device.
Background technique
In engineering design and construction security evaluation, for example, above the subway terminal of shallow mining method resistance to shear of soil to branch
It is vital for the design of protection structure.Meanwhile ground is under building long duration load, as excess pore water pressure disappears
It dissipates, settlement of foundation can all occur for the growth of effective stress.When allowed band of the settlement of foundation beyond above-ground structures, just will affect
The normal use or even order building of building crack.Therefore, it is practical to determine to need to carry out field measurement in Practical Project
Settling amount.
In resistance to shear of soil measurement, existing measurement method majority buries soil pressure cell with the pre-buried method that drills, and is subsequently filled same
It is compacted after sample or the similar soil body, to measure resistance to shear of soil；In practice, it has been found that existing mode suffers from the drawback that head
First, the embedded intracorporal soil pressure cell of soil is typically expendable, and there are serious wastes；Secondly, mostly at present is by will be native
Pressure cell is tied up to be then sent through in drilling on steel reinforcement cage, and during this, the collision of steel reinforcement cage and hole wall inevitably causes soil
Pressure cell diaphragm overloads and generates permanent deformation；In addition, the backfill after soil body drilling destroys prototype structure and stress, measure
Data precision decline.
It is to subsidence monitoring mostly now in soil body settlement monitoring means.Such as infrared monitor and scene are buried and sink
The methods of plate drops.These methods either can be to the construction at scene there is only single the problem of surveying the summation settled or measurement process
Lead to the problem of severe jamming.
Summary of the invention
Technical problem to be solved by the invention is to provide one kind can be heavy with layering measurement while measurement resistance to shear of soil
The layer-stepping resistance to shear of soil and settlement measuring device of drop amount.The measuring device structure is simple, easy to use, to measurement soil layer construction
Small with the influence of stress, the reliability of measurement data is higher.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is that: a kind of layer-stepping resistance to shear of soil and sedimentation
Measuring device, comprising: soil pressure cell, conducting wire, acquisition Instrumen, it is characterized in that: further including fixed steel bars hole, hollow bushing group
Part, embedded tulwar and displacement meter, hollow bushing component include several suit and length gradually shorten from inside to outside it is hollow
Casing, the capping on each hollow pipe and each rotating handle, the hollow sleeve pipe ring inner wall are equipped with vertical slide groove, the slide groove
It is interior to be equipped with ball；The outside of the slide groove is equipped with vertical lead wire slot, and the metallic channel is equipped with inlet wire in the side wall of hollow bushing
Hole, top are equipped with outlet hole；The hollow bushing component is fixed in fixed steel bars hole；The embedded tulwar and hollow bushing
Connection, the embedded tulwar are equipped with soil pressure cell；The quantity of the displacement meter is adapted and measures with hollow bushing quantity
Contact is connected in capping or rotating handle.
The fixed steel bars hole is formed by vertical reinforcement and upper, middle and lower horizontal circular ring reinforcing bar as bracket, and fixed steel bars hole
Half side Steel bar rack covering, the covering Steel bar rack are equipped with several vertical reinforcements, and fixed steel bars hole bottom is equipped with
Polished rod is inserted into the hollow bushing of Vertical bar connection.
The polished rod is arranged in the side of reinforced hole, after the embedded tulwar insertion soil body soil pressure cell stress surface completely into
In the soil body to be measured.
The hollow bushing has 3~5 hollow pipes, and the polished rod upper end passes through the fixed each displacement meter ontology of stationary fixture.
In hollow pipe lower part, embedded tulwar is connected to one by welding manner with hollow pipe for the embedded tulwar setting
It rises.
There is the knife edge in the embedded tulwar side, and free end is tip, is equipped with soil pressure cell in the middle part of blade and places groove,
The groove with stalloy cover and be screwed and groove to tulwar tail portion be equipped with conducting wire duct.
A kind of test method of layer-stepping resistance to shear of soil and settlement measuring device, comprising the following steps:
Step 1, measuring point depth and resistance to shear of soil are estimated, suitable hollow pipe quantity and length and soil pressure cell are selected；
Step 2, measuring device is placed in prebored hole；
Step 3, the data of stress and sedimentation are acquired after stability under loading.
It stretches hollow pipe according to experimental program, flushes embedded tulwar with point position, rotating handle is to drive tulwar
It is inserted into soil layer.
The beneficial effects of the present invention are: slide groove and ball can be reduced the friction between Guan Yuguan, it is that settlement measurement is accurate
Property provides safeguard；Resistance to shear of soil and sedimentation are measured simultaneously, simplifies measurement process, and stress and sedimentation is avoided to measure give soil body band respectively
Carry out more large disturbances, improves accuracy of measurement；The previous necessary pre-buried step of resistance to shear of soil measurement is avoided, without excavation, backfill
Measurement is effectively reduced to the structure of the soil body and the influence of primitive stress, so that measurement is more convenient, accurate and efficient in body；Vertically
The measurement of direction multiple spot records stress and settlement values of the soil body in longitudinal depth, for research stress and is deposited in vertical side
To changing rule provide foundation.
Detailed description of the invention
Fig. 1 is a kind of layer-stepping resistance to shear of soil measuring device overall schematic of the invention,
Fig. 2 is embedded tulwar schematic diagram of the invention,
Fig. 3 is of the invention for measuring device rotating body schematic diagram,
Fig. 4 is outer hollow pipe flat cutting faces schematic diagram of the invention,
Fig. 5 is outer hollow pipe sectional elevation schematic diagram of the invention,
Fig. 6 is fixed steel bars hole wall and polished rod schematic diagram of the invention,
Fig. 7 is stationary fixture schematic diagram of the invention.
In figure:
1-1, hollow pipe 1-2, ball 1-3, slide groove
2,3, embedded tulwar 3-1, the knife edge are covered
3-2, tip 3-3, reserved groove 4, soil pressure cell
5-1, fixed steel bars hole wall 5-2, polished rod 6, stalloy
7, conducting wire 8, duct 9, screw
10, displacement meter 11, fixture 12, clamp bar
13, nut 14, bolt 15, rotating handle.
Specific embodiment
Invention is further described in detail with reference to the accompanying drawings and detailed description:
As shown in figs. 1-7, a kind of layer-stepping resistance to shear of soil and settlement measuring device, composition includes: hollow bushing 1-1,
Ball 1-2, slide groove 1-3, capping 2, rotating handle 15, embedded tulwar 3, fixed steel bars hole wall 5-1 and with fixed steel bars hole
The polished rod 5-2 of wall connection, displacement meter 10, stationary fixture 11.Soil pressure cell is placed in embedded tulwar, and conducting wire 7 is through tulwar
It is pierced by capping 2 upwards with the duct 8 in hollow bushing 1, is connected to acquisition Instrumen.There are slide groove and ball in hollow pipe.It is empty
Length of each composition hollow pipe of heart casing in bottom gradually shortens from inside to outside.Hollow bushing is fixed by polished rod, is formed steady
Fixed test device, and polished rod surface is smooth, in order to the rotation of hollow bushing.
Further, the hollow bushing can be made of 3-5 hollow pipes, and hollow inside pipe wall has a slide groove, in slide groove
Equipped with ball.
Further, respectively there is a capping at the top of the hollow pipe, capping is screwed with hollow pipe, the conducting wire of capping
The wire guide connection in hole and hollow pipe；Hollow pipe lower part is equipped with embedded tulwar, on the wire guide and side wall of hollow pipe of tulwar
Wire guide connection, and fix by welding.
Further, there is knife edge 3-1 in the embedded tulwar side, and a tip 3-2 is arranged at top, and there are grooves at blade middle part
3-3 and there is duct 8 of the item from groove to tulwar tail portion.Soil pressure cell is placed in the reserved groove of embedded tulwar, with thin steel
6 cover of piece is simultaneously fixed with screw 9.
Further, the fixing clamp is made up of two clamp bars 12 nut 13 and bolt 14.
Further, the hollow bushing is made of hollow pipe different in size, and outermost layer hollow pipe is most short, and innermost layer is hollow
Pipe longest；Hollow pipe lower end is closed up, sealed tube inner slide, to prevent ball leakage.
According to Fig. 1-3 it is found that a kind of measurement method of layer-stepping resistance to shear of soil and settlement measuring device, the steps include:
(1) measuring point depth and resistance to shear of soil are estimated, selected quantity and the hollow pipe and each soil pressure cell that are of convenient length.
(2) resistance to shear of soil and settlement measuring device are assembled, by taking three hollow pipes as an example:
1) slideway by middle layer hollow pipe along outer hollow pipe is inserted into, and after being put into ball in slideway between the two, uses spiral shell
Silk fixation is covered in outer hollow tube top portion.The wire guide of capping will be with the connection one by one of the wire guide at the top of hollow pipe.It again will be interior
Layer hollow pipe is inserted into along the slideway of the hollow inside pipe wall in middle layer, inside, in be put into ball in slideway between two layers of hollow pipe after, use
Screw, which is taken up in order of priority to fix one and be covered at the top of middle layer hollow pipe and internal layer hollow pipe, forms rotating body.
2) three soil pressure cell BW-100 are respectively installed in the reserved groove of three embedded tulwars, pressure cell is led
Line is pierced by capping through the duct in tulwar and hollow bushing upwards, is connected to acquisition Instrumen.Stalloy is covered on soil pressure cell
On, and screw down.Embedded tulwar trailing wire mouth is docked and is welded with outer hollow pipe side guidewire port.
3) fixed steel bars hole wall is made using reinforcing bar and covering, fixed steel bars hole wall is by vertical reinforcement and horizontal circular ring reinforcing bar
Make bracket.The top of fixed steel bars hole wall, in, bottom respectively have a horizontal circular ring reinforcing bar, according to actual needs, can be at three positions
The arrangement of appropriate encryption annulus reinforcing bar；In half of Steel bar rack side to covering, vertical reinforcing bar is equidistant according to 4 quantity
Distribution, another half of Steel bar rack side of covering is not necessarily to vertical reinforcing bar then；Smooth polished rod is welded by two sections small of hollow pipe
Onto fixed steel bars hole wall.Fixed steel bars hole wall and polished rod are integrally placed into the prebored hole in the soil body to be measured.It is curved to guarantee
Soil pressure cell smoothly can be inserted into the soil body under the drive of rotating body by knife, and the position of polished rod should be close to hole wall side, such as
Shown in Fig. 6.
(3) assembled measuring device is placed in prebored hole, stretches hollow pipe according to experimental program, makes embedded tulwar
It is flushed with point position, rotating handle is to drive tulwar to be inserted into soil layer.The displacement transmission lever of displacement meter is close to revolve vertically downward
Handle or capping are changed hands, rotates the nut on stationary fixture in terms of fixed displacement.It can be adopted by Acquisition Instrument after stability under loading
With the data of eastern China's test DH3816 static strain testing analysis system acquisition stress and sedimentation.
Claims (8)
1. a kind of layer-stepping resistance to shear of soil and settlement measuring device, comprising: soil pressure cell, conducting wire, acquisition Instrumen, feature
It is: further includes fixed steel bars hole, hollow bushing component, embedded tulwar and displacement meter, hollow bushing component includes several sets
Hollow bushing, the capping on each hollow pipe and each rotating handle that dress and length gradually shorten from inside to outside, the hollow bushing
Ring inner wall is equipped with vertical slide groove, is equipped with ball in the slide groove；The outside of the slide groove is equipped with vertical lead wire slot, described
Metallic channel is equipped with entrance hole, top equipped with outlet hole in the side wall of hollow bushing；The hollow bushing component is fixed on fixed steel
In muscle hole；The embedded tulwar is connect with hollow bushing, and the embedded tulwar is equipped with soil pressure cell；The displacement meter
Quantity is adapted with hollow bushing quantity and metering contact is connected in capping or rotating handle.
2. a kind of layer-stepping resistance to shear of soil according to claim 1 and settlement measuring device, it is characterized in that: the fixed steel
Muscle hole is formed by vertical reinforcement and upper, middle and lower horizontal circular ring reinforcing bar as bracket, and half side Steel bar rack of fixed steel bars hole covers
Skin, the covering Steel bar rack are equipped with several vertical reinforcements, and fixed steel bars hole bottom is equipped with the sky with Vertical bar connection
Heart casing is inserted into polished rod.
3. a kind of layer-stepping resistance to shear of soil according to claim 2 and settlement measuring device, it is characterized in that: the polished rod is set
It sets in the side of reinforced hole, soil pressure cell stress surface is completely into the soil body to be measured after embedded tulwar is inserted into the soil body.
4. a kind of layer-stepping resistance to shear of soil according to claim 1 and settlement measuring device, it is characterized in that: the hollow sleeve
Pipe has 3~5 hollow pipes, and the polished rod upper end passes through the fixed each displacement meter ontology of stationary fixture.
5. a kind of layer-stepping resistance to shear of soil according to claim 1 and settlement measuring device, it is characterized in that: described embedded
Tulwar is arranged in hollow pipe lower part, and embedded tulwar and hollow pipe are linked together by welding manner.
6. a kind of layer-stepping resistance to shear of soil according to claim 5 and settlement measuring device, it is characterized in that: described embedded
There is the knife edge in tulwar side, and free end is tip, is equipped with soil pressure cell in the middle part of blade and places groove, the groove is sealed with stalloy
Face and be screwed and groove to tulwar tail portion be equipped with conducting wire duct.
7. a kind of test method of layer-stepping resistance to shear of soil and settlement measuring device a kind of according to claim 1, including with
Lower step:
Step 1, measuring point depth and resistance to shear of soil are estimated, suitable hollow pipe quantity and length and soil pressure cell are selected；
Step 2, measuring device is placed in prebored hole；
Step 3, the data of stress and sedimentation are acquired after stability under loading.
8. the test method of a kind of layer-stepping resistance to shear of soil and settlement measuring device according to claim 7, it is characterized in that:
It stretches hollow pipe according to experimental program, flushes embedded tulwar with point position, rotating handle is to drive tulwar to be inserted into soil layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910694955.4A CN110346068A (en) | 2019-07-30 | 2019-07-30 | A kind of layer-stepping resistance to shear of soil and settlement measuring device and measurement method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910694955.4A CN110346068A (en) | 2019-07-30 | 2019-07-30 | A kind of layer-stepping resistance to shear of soil and settlement measuring device and measurement method |
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| Publication Number | Publication Date |
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| CN110346068A true CN110346068A (en) | 2019-10-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910694955.4A Pending CN110346068A (en) | 2019-07-30 | 2019-07-30 | A kind of layer-stepping resistance to shear of soil and settlement measuring device and measurement method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113739861A (en) * | 2021-11-05 | 2021-12-03 | 深圳市城市交通规划设计研究中心股份有限公司 | Slope soil body three-dimensional deformation monitoring device and plane dip angle change identification method |
| CN114754668A (en) * | 2022-04-19 | 2022-07-15 | 中南大学 | Device for measuring deformation of stratum soil body |
-
2019
- 2019-07-30 CN CN201910694955.4A patent/CN110346068A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113739861A (en) * | 2021-11-05 | 2021-12-03 | 深圳市城市交通规划设计研究中心股份有限公司 | Slope soil body three-dimensional deformation monitoring device and plane dip angle change identification method |
| CN113739861B (en) * | 2021-11-05 | 2022-03-18 | 深圳市城市交通规划设计研究中心股份有限公司 | Slope soil body three-dimensional deformation monitoring device and plane dip angle change identification method |
| CN114754668A (en) * | 2022-04-19 | 2022-07-15 | 中南大学 | Device for measuring deformation of stratum soil body |
| CN114754668B (en) * | 2022-04-19 | 2022-12-23 | 中南大学 | Device for measuring deformation of stratum soil body |
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Application publication date: 20191018 |