CN110346069A - A kind of direct drive type resistance to shear of soil and settlement measuring device and measurement method - Google Patents
A kind of direct drive type resistance to shear of soil and settlement measuring device and measurement method Download PDFInfo
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- CN110346069A CN110346069A CN201910694956.9A CN201910694956A CN110346069A CN 110346069 A CN110346069 A CN 110346069A CN 201910694956 A CN201910694956 A CN 201910694956A CN 110346069 A CN110346069 A CN 110346069A
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- soil
- shear
- measuring device
- hollow
- straight push
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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)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses a kind of direct drive type resistance to shear of soil and settlement measuring device and measurement methods, including soil pressure cell, fixed steel bars hole, hollow bushing component, straight push blade and displacement meter, hollow bushing component to be fixed in fixed steel bars hole；Straight push blade is connect with hollow bushing, and straight push blade is equipped with soil pressure cell；Displacement meter metering contact is connected in capping or rotating handle.It stretches hollow pipe according to experimental program, flush straight push blade with point position, rotating handle is inserted into soil layer with band cutting blade, the displacement transmission lever of displacement meter is close to rotating handle vertically downward, the nut on stationary fixture is rotated in terms of fixed displacement, to provide the measurement method of measurement resistance to shear of soil and settlement measuring device.Beneficial effect is: by multiple blades while can be pushed into the soil body, measure more convenient, accurate and efficient；Be measured as resistance to shear of soil and the sedimentation of vertical direction multiple spot provide foundation in the research of the changing rule of each soil layer with depth.
Description
Technical field
The invention belongs to in-situ testing technique field on site, in particular to a kind of direct drive type resistance to shear of soil and settlement measurement dress
It sets and measurement method.
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
Measurement settling amount while resistance to shear of soil can be measured technical problem to be solved by the invention is to provide one kind
Direct drive type resistance to shear of soil and settlement measuring device.The measuring device structure is simple, easy to use, to measurement soil layer construction and stress
Influence it is small, 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 direct drive type resistance to shear of soil and sedimentation
Measuring device, comprising: soil pressure cell, conducting wire, acquisition Instrumen further include fixed steel bars hole, hollow bushing component, straight push blade
And displacement meter, hollow bushing component include several suits and hollow bushing, each hollow pipe that length gradually shortens from inside to outside
On capping and each rotating handle, the hollow sleeve pipe ring inner wall is equipped with vertical slide groove, ball is equipped in the slide groove；Institute
The outside for stating slide groove is equipped with vertical lead wire slot, and the metallic channel is equipped with entrance hole, top equipped with out in the side wall of hollow bushing
String holes；The hollow bushing component is fixed in fixed steel bars hole；The straight push blade is connect with hollow bushing, the straight push broach
On piece is equipped with soil pressure cell；The displacement meter metering contact is connected in capping or rotating handle.
The fixed steel bars hole is formed by several vertical reinforcements and upper, middle and lower horizontal circular ring reinforcing bar as bracket, and fixed steel
Half side Steel bar rack covering of muscle hole, the covering Steel bar rack are equipped with several vertical reinforcements, fixed steel bars hole bottom
Equipped with being inserted into polished rod with the hollow bushing of Vertical bar connection.
The centre of the lower horizontal circle ring support in fixed steel bars hole is arranged in the polished rod, and polished rod can be among lower annulus
It is smoothly moved on moving track, the polished rod upper end passes through stationary fixture fixed displacement meter ontology.
The hollow bushing has 3~5 hollow pipes, in the capping or rotating handle of each hollow pipe with the survey of displacement meter
Measure contact connection.
The straight push blade is arranged in hollow pipe lower part, is connect straight push blade with hollow pipe by the way of welding.
There are a knife edge in three sides of the straight push blade, and soil pressure cell is equipped among 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 measurement method of direct drive type resistance to shear of soil and settlement measuring device, steps are as follows:
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 straight push blade with point position, rotating handle is inserted with band cutting blade
The displacement transmission lever of displacement meter is close to rotating handle by underground layer vertically downward, rotates the nut on stationary fixture with fixed bit
Move meter.
The beneficial effects of the present invention are: can be pushed into multiple blades in the soil body simultaneously, reduce because subsequent insertion blade is to it
The influence of preceding insertion blade and surrounding soil；Slide groove and ball can be reduced the friction between Guan Yuguan, be that settlement measurement is accurate
Property provides safeguard；The step that the measurement of previous resistance to shear of soil must be pre-buried is avoided, measurement is effectively reduced to the structure of the soil body and original
The influence of stress, so that measurement is more convenient, accurate and efficient；Vertical direction multiple spot is measured as resistance to shear of soil and sedimentation with depth
The research spent in the changing rule of each soil layer provides foundation.
Detailed description of the invention
Fig. 1 is a kind of direct drive type resistance to shear of soil measuring device overall schematic of the invention,
Fig. 2 is straight push blade schematic diagram of the invention,
Fig. 3 is measuring device main body schematic diagram of the invention,
Fig. 4 is outer hollow pipe sectional elevation schematic diagram of the invention,
Fig. 5 is outer hollow pipe flat cutting faces schematic diagram of the invention,
Fig. 6 is fixed steel bars hole wall and polished rod of the invention, moving track schematic diagram,
Fig. 7 is stationary fixture schematic diagram.
In figure:
1-1, hollow pipe 1-2, ball 1-3, slide groove
2,3, straight push blade 3-1, the knife edge are covered
3-2, 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 16, moving track
Specific embodiment
Invention is further described in detail with reference to the accompanying drawings and detailed description:
As shown in Figures 1 to 6, a kind of direct drive type resistance to shear of soil measuring device, composition includes: hollow bushing 1-1, ball 1-
2, capping 2 and rotating handle 15 on slide groove 1-3 and each hollow pipe, straight push blade 3, soil pressure cell 4, fixed steel bars hole wall 5-
The 1 and polished rod 5-2 that is connected with fixed steel bars hole wall, displacement meter 10, stationary fixture 11.Soil pressure cell is placed in straight push blade,
Its conducting wire 7 is pierced by capping 2 through the duct 8 in straight push blade and hollow bushing upwards, is connected to acquisition Instrumen.Have in hollow pipe
Slide groove and ball.Length of each composition hollow pipe of hollow bushing in bottom gradually shortens from inside to outside.Hollow bushing by
Fixed steel bars hole wall and polished rod provide support, stable test device are formed, in order to rotate and move.
Further, the hollow bushing has 3~5 hollow pipes, and hollow inside pipe wall is equipped with slide groove, is equipped with rolling in slide groove
Pearl.
Further, respectively there is a capping at the top of the hollow pipe, capping is fixed by screw 9 with hollow pipe, and capping is led
The wire guide connection of string holes and hollow pipe；Hollow pipe lower part is equipped with straight push blade, the wire guide and side wall of hollow pipe of straight push blade
On wire guide connection, and the two is connected by welding.
Further, there is knife edge 3-1 in three side of straight push blade, and there are groove 3-2 at blade middle part, and have a duct 8
Connecting groove and blade tail portion.Soil pressure cell is placed in the reserved groove of straight push blade, with 6 cover of stalloy and with screw 9
It is fixed.
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, and sealed tube inner slide prevents ball from leaking out.
A kind of measurement method of direct drive type 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 measuring device is assembled, by taking three hollow pipes as an example:
1) slideway by middle layer hollow pipe along outer hollow inside pipe wall is inserted into, after being put into ball in slideway between the two,
Capping is screwed down, capping is made to be fixed on outer hollow tube top portion.The wire guide of capping will be with the wire guide at the top of hollow pipe
Connection one by one.Internal layer hollow pipe is inserted into along the slideway of the hollow inside pipe wall in middle layer again, inside, in slideway between two layers of hollow pipe
After being inside put into ball, it is taken up in order of priority with screw and fixes one and be covered at the top of middle layer hollow pipe and internal layer hollow pipe.
2) three soil pressure cell BW-100 are respectively installed in the reserved groove of three straight push blade, the conducting wire of pressure cell
It is pierced by capping upwards through the duct in straight push blade and hollow bushing, is connected to acquisition Instrumen；Stalloy is covered on soil pressure
On box, and screw down.Straight push blade 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 according between 4 quantity etc.
Away from 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
It is connected on 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.Polished rod can
To realize the art skating of horizontal direction on moving track, as shown in Figure 6.
(3) assembled measuring device is placed in prebored hole, is stretched hollow pipe according to experimental program, make straight push blade with
Point position flushes, and the unified alignment of blade is wanted soil body direction to be measured by rotating handle, that is, moves along the direction of track, pushes dress
Setting makes blade enter the soil body.The displacement transmission lever of displacement meter is close to rotating handle or capping vertically downward, rotates stationary fixture
On nut in terms of fixed displacement.After stability under loading DH3816 static strain testing analysis system can be tested by eastern China
Acquisition Instrument acquires resistance to shear of soil and settling data.
Claims (8)
1. a kind of direct drive type 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, straight push blade and displacement meter, hollow bushing component includes several suits
And hollow bushing, the capping on each hollow pipe and each rotating handle that length gradually shortens from inside to outside, the hollow sleeve pipe 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 to lead
Wire casing 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 bars
In hole；The straight push blade is connect with hollow bushing, and the straight push blade is equipped with soil pressure cell；The displacement meter metering contact
It is connected in capping or rotating handle.
2. a kind of direct drive type 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 several vertical reinforcements and upper, middle and lower horizontal circular ring reinforcing bar as bracket, and half side reinforcement bar support of fixed steel bars hole
Frame covering, the covering Steel bar rack are equipped with several vertical reinforcements, and fixed steel bars hole bottom is equipped with and Vertical bar connection
Hollow bushing be inserted into polished rod.
3. a kind of direct drive type 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 centre of the lower horizontal circle ring support in fixed steel bars hole, polished rod can smoothly move on the moving track among lower annulus
Dynamic, the polished rod upper end passes through stationary fixture fixed displacement meter ontology.
4. a kind of direct drive type 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, connect with the metering contact of displacement meter in the capping or rotating handle of each hollow pipe.
5. a kind of direct drive type resistance to shear of soil according to claim 1 and settlement measuring device, it is characterized in that: the straight push broach
Piece is arranged in hollow pipe lower part, is connect straight push blade with hollow pipe by the way of welding.
6. a kind of direct drive type resistance to shear of soil according to claim 5 and settlement measuring device, it is characterized in that: the straight push broach
There are the knife edge in three sides of piece, are equipped with soil pressure cell among blade and place groove, the groove is with stalloy cover and uses screw
Fixed and groove is equipped with conducting wire duct to tulwar tail portion.
7. a kind of a kind of measurement method of direct drive type resistance to shear of soil and settlement measuring device according to claim 1, step
It is as follows:
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 measurement method of direct drive type resistance to shear of soil and settlement measuring device according to claim 7, it is characterized in that: according to
Experimental program stretches hollow pipe, flushes straight push blade with point position, and rotating handle is inserted into soil layer with band cutting blade, will be displaced
The displacement transmission lever of meter is close to rotating handle vertically downward, rotates the nut on stationary fixture in terms of fixed displacement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910694956.9A CN110346069A (en) | 2019-07-30 | 2019-07-30 | A kind of direct drive type resistance to shear of soil and settlement measuring device and measurement method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910694956.9A CN110346069A (en) | 2019-07-30 | 2019-07-30 | A kind of direct drive type resistance to shear of soil and settlement measuring device and measurement method |
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| Publication Number | Publication Date |
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| CN110346069A true CN110346069A (en) | 2019-10-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910694956.9A Pending CN110346069A (en) | 2019-07-30 | 2019-07-30 | A kind of direct drive type 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 |
|---|---|---|---|---|
| US20210270685A1 (en) * | 2021-04-28 | 2021-09-02 | Shenzhen University | Optical fiber sensing monitoring device for soil settlement and settlement amount measurement 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 CN201910694956.9A patent/CN110346069A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20210270685A1 (en) * | 2021-04-28 | 2021-09-02 | Shenzhen University | Optical fiber sensing monitoring device for soil settlement and settlement amount measurement 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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| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20191018 |
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| WD01 | Invention patent application deemed withdrawn after publication |