CN107905202A - The migration path detection experimental provision of filler during high rheology weak soil dynamic replacement - Google Patents
The migration path detection experimental provision of filler during high rheology weak soil dynamic replacement Download PDFInfo
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- CN107905202A CN107905202A CN201711098063.5A CN201711098063A CN107905202A CN 107905202 A CN107905202 A CN 107905202A CN 201711098063 A CN201711098063 A CN 201711098063A CN 107905202 A CN107905202 A CN 107905202A
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- weak soil
- migration path
- experimental provision
- path detection
- test box
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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
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/046—Improving by compacting by tamping or vibrating, e.g. with auxiliary watering of the soil
- E02D3/054—Improving by compacting by tamping or vibrating, e.g. with auxiliary watering of the soil involving penetration of the soil, e.g. vibroflotation
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Soil Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Agronomy & Crop Science (AREA)
- Environmental & Geological 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)
Abstract
Migration path the invention discloses filler during a kind of high rheology weak soil dynamic replacement detects experimental provision, mainly by model test box, ram loading system, five external observation system, metal detecting system and Displacement Analysis system parts form.Wherein, metal detecting system is embedded in the baffle of model case apparatus both sides, and is connected by baffle opening of external wall groove with external Displacement Analysis system, in the entire experiment process to the signal detection of particle migration track.Ram loading system to be fixed by the bracket in model casing upper part, hammer ram vertically and horizontally position, while adjust away from so that the compound action such as simulated implementation free-falling hammer manually under strong rammer can be manually accurately positioned by scale.The present apparatus is simple to manufacture, measurement result accurately and reliably, followed the trail of by electromagnetic signal, the migration path of the high rheology weak soil filler under strong rammer Impact Load can be obtained, be simple to manufacture, measurement result accurately and reliably.
Description
Technical field
The present invention relates to Geotechnical Engineering field and circuit signal control field, and in particular to a kind of high rheology weak soil is strong
The migration path detection experimental provision of filler when ramming displacement.
Background technology
Weak soil mainly includes mud and muck soil, is usually first deposited under the tranquil or slow water environment of flow velocity, after
Formed under biological chemistry action.China Soft Soil Area is distributed mainly on the coastal areas such as Shanghai, Hangzhou, Ningbo Wenzhou, and Kunming,
The hinterland such as Wuhan.Due to weak soil have water content is high, Natural gas composition is low, poor permeability, compressibility are high, consolidation time is long,
The features such as rheological behavior is notable, under the action of long duration load, shows obvious creep properties.Generally speaking, Soft Soil Layer work
Cheng Xingzhi is poor, although can still keep certain stability under native state, once and bearing load or effect of vibration are easily sent out
Raw thixotroping, rheology or failure by shear, and then larger differential settlement is produced because losing intensity.And pass through dynamic replacement rule
The intensity of soil, the liquefaction condition for reducing native compressibility, improving soil can be improved, the uniformity coefficient of soil layer is improved and reduces difference and sink
Drop.
Heavy tamping replacement method, i.e., using the high energy impact events of strong rammer, by materials such as the excellent sandstone of intensity and water permeability, slags
Material, which is rammed into soft layer, forms the displacement of column stake formula or overall laminar displacement composite foundation.Compared with common heavy-tamping method, strong rammer
Displacement can preferably be suitable for the processing of high saturation, low permeability, low-intensity, high-compressibility soft soil foundation.Dynamic replacement
Method soft soil foundation is displacement, collective effect that is compacted and expanding drainage channel, its consolidation effect to soft layer is main
Rely on the depth rammed and to form replacement.
The model experiment of heavy tamping replacement method reinforcement mechanism is by simulating on-site actual situations, by geometric similarity, kinematic similitude
And the similarity rules of power are designed, simulate and actual similar operating mode.General model experiment is simply by model casing
Interior embedded sensor acquires the intensity and compression degree of weak soil after strong rammer, can not accurately reflect dynamic replacement deeply
The replacement result and replacement depth of lower filler particles and Soft Soil Layer.
The content of the invention
To solve the above problems, the migration path detection the invention discloses filler during a kind of high rheology weak soil dynamic replacement
Experimental provision, with reference to electromagnetic induction principle, not only simulates the experiment effect of dynamic replacement, while in experimentation, utilizes
Electromagnetism follows the trail of the migration path of filler particles, draws block stone, the movement law of the soil body during dynamic replacement, strong rammer is put with this
Changing the reinforcing soft soil roadbed mechanism of action of method has more comprehensively deep understanding.
To reach above-mentioned purpose, technical scheme is as follows：
During a kind of high rheology weak soil dynamic replacement filler migration path detection experimental provision, including model test box, ram plus
Loading system, external observation system, metal detecting system and Displacement Analysis system.
The side for the upper opening that the model test box is made of base, side board, end face organic glass observation window
Shape structure, block stone bed course, high rheology Soft Soil Layer are equipped with model test box, is equipped with described piece of stone bed course and posts gold from top to bottom
Weak soil filler particles, the base for belonging to piece are arranged on model test box bottom, and model test box bottom and inner wall are laid with sealing geotechnique
Cloth.
The loading system of ramming is made of locating rod, hook, Position Scale, weight, stent, and stent passes through bolt and mould
The top corner of type chamber is connected, and Position Scale top is undaform groove, and outer wall indicates scale, and Position Scale is welded on
Frame upper, for locating rod across on Position Scale, locating rod lower part sets cavity, is equipped with card slot in cavity, is equipped with card slot
Slide plate, the hook are bolted with slide plate, and weight is placed in hook lower section.
The external observation system is made of former and later two organic glass observation windows, is fixed on the base of model test box
And two between side shield.
The metal detecting system is arranged device and is formed by metal transmitting coil, receiving coil, data signal reception.In baffle
Portion's hollow out, metal transmitting coil, receiving coil are placed in baffle interior and fixation, and data signal reception arranges device and is positioned over model examination
On the outside of tryoff.
The Displacement Analysis system is made of external circuits signal with computer.Data-signal is by arranging device after circuit
Expansion is handled, and is calculated by computer, so that the coordinate of stone is specifically positioned, according to background process, it can be deduced that with
Under time change, each specific coordinate of experiment stone on specific time point, finally obtain stone on a timeline
Movement locus.
The a length of 1000mm of locating rod, its upper surface indicate location graduation, are 70mm ~ 100mm's in its symmetrical position
Bottom surface sets undaform groove to be used to fit closely with Position Scale, and bottom surface sets card slot therebetween, it is allowed to link up with
It is built among card slot and slides, is bolted hook in the position of locating rod internal slide.
The blotter, high rheology Soft Soil Layer are from the original state soil layer acquired by scene on the spot；Weak soil filler
Grain is experimental study object, and filler particles are the original state block stone in blotter, according to requirement of experiment, determines experiment filler
Grain number amount, the sheet metal of different shape, quality is posted on filler particles respectively, is identified and is positioned easy to metal detecting device.
The metal transmitting coil, receiving coil are placed in left and right sides baffle interior and fixation, four metals hair of homonymy
Ray circle is placed in the inner side for receiving big coil；Baffle left and right sides surface-closed but outer wall is provided with a small sircle hole, to coil with
Data signal reception arranges the connection of device；Signal, which receives, arranges in device that there is provided transmission line to be connected with outer computer.
The beneficial effects of the invention are as follows：
The present invention combines electromagnetic induction principle, develops the migration path analog detection of a set of high rheology weak soil filler under strong rammer
Device, exploration draws block stone, the movement law of the soil body during dynamic replacement, reinforcing soft soil roadbed to heavy tamping replacement method with this
The mechanism of action has more comprehensively deep understanding, be simple to manufacture, measurement result accurately and reliably.
Brief description of the drawings
Fig. 1 is the structure diagram of the present invention.
Fig. 2 is the design detail of locating rod of the present invention and hook combination.
Reference numerals list：
1-locating rod, 2-hook, 3-Position Scale, 4-weight, 5-stent, 6-baffle, 7-transparent glass observation window,
The weak soil filler particles of 8-metal clad piece, 9-block stone bed course, 10-high rheology Soft Soil Layer, 11-transmitting coil, 12-connect
Take-up circle, 13-base, 14-signal, which receive, arranges device, 15-computer, 16-slide plate, 17-groove, 18-cavity, 19-
Card slot.
Embodiment
With reference to the accompanying drawings and detailed description, the present invention is furture elucidated, it should be understood that following embodiments are only
For illustrating the present invention rather than limiting the scope of the invention.It should be noted that word " preceding " used in the following description,
" rear ", "left", "right", "up" and "down" refer to the direction in attached drawing, and word " interior " and " outer " refer respectively to direction or remote
From the direction of particular elements geometric center.
Embodiment：Model test box inside dimension is 800mm × 800mm × 800mm（Length × width × height）, in order to reduce
Interference to magnetic field, base（13）With two side shields（6）It is made by high-strength PVC material, base（13）Thickness is 50mm,
Base（13）It need to ensure horizontal positioned, left and right side shield（6）Thickness is 50mm, and model test box is internally provided with two layers：Block stone bed course
（9）, high rheology Soft Soil Layer（10）, wherein block stone bed course（9）Weak soil filler particles（8）Metal clad piece above, base（13）
Play pad, model test box bottom and side wall are laid with sealing geotextiles and make Anti-seeping technology, and the front-back of model casing is respectively provided with
Transparent glass observation window（7）, wall thickness 15mm, in order to reduce the deformation under high stress, glass is using the organic glass of thickening
Glass, and be fixed and be fitted on the side shield of left and right with glass cement, it is convenient to test process progress early period, experimental observation and data note
Record.
The blotter（9）, high rheology Soft Soil Layer（10）It is from the original state soil layer acquired by scene on the spot；Weak soil
Filler particles are experimental study object, and filler particles are the original state block stone in blotter, according to requirement of experiment, determine experiment
Filler particles（8）Quantity, filler particles（8）The upper sheet metal for posting different shape, quality respectively, knows easy to metal detecting device
Do not position.
The loading system of ramming is by locating rod（1）, hook（2）, Position Scale（3）, weight（4）, stent（5）Composition.
Stent（5）Height be 500mm, be connected by bolt with the top corner of model test box.Position Scale（3）Length is
800mm, identical with the model test box length of side, top is undaform groove, and outer wall indicates scale, is welded on stent（5）Top.It is fixed
Position bar（1）A length of 1000mm, its upper surface indicate location graduation, and the bottom surface for being 70mm ~ 100mm in its symmetrical position is set
Arc convex surface is put to be used for and Position Scale（3）Undaform groove fit closely, therebetween bottom surface set card slot, it is allowed to hang
Hook（2）It is built among card slot and slides, is bolted hook（2）In locating rod（1）The position of internal slide.Hook（2）
It is placed in locating rod（1）Downside, freely slidable, weight（4）Hook can be placed in（2）On.Locating rod（1）Lower part is set recessed
Groove passes through manual control and Position Scale（3）Fit, so that fixed weight（4）Drop-off positions.
The metal detecting system is by metal transmitting coil（11）, receiving coil（12）, data signal reception arrange device
（14）Composition.Baffle（6）Internal hollow out, metal transmitting coil（11）, receiving coil（12）It is placed in left and right side shield（6）Inside is simultaneously
Fixed, data signal reception arranges device（14）It is positioned on the outside of model casing.Block stone（8）On sheet metal may be selected to be copper sheet, lead to
Cross in baffle both sides equipped with the transmitting coil that can launch alternating electromagnetic field（11）, block stone（8）On metal copper sheet by alternating electromagnetism
Encourage when, break out eddy current in copper sheet, and the electric current launch one with original field frequency as but direction conversely
Magnetic field, by receiving coil（12）The signal of copper sheet is received, receives coil（12）The signal of vortex breaking-out is searched out, and by counting
It is believed that a number reception arranges device（14）Preserve reception.
The Displacement Analysis system is by external circuits signal and computer（15）Form.Device is arranged by data signal reception
（14）By being handled through the expansion after circuit, pass through computer（15）Certain circuit algorithm is simulated, so as to specifically position stone
Coordinate, according to background process, it can be deduced that as under time change, each the specific of experiment stone sits on specific time point
Mark, finally obtains the movement locus on a timeline of stone.
The metal transmitting coil（11）, receiving coil（12）It is placed in left and right side shield（6）It is internal and fixed, homonymy
Four metal transmitting coils（11）It is placed in and receives big coil（12）Inner side；Baffle（6）Left and right sides surface-closed but side wall is opened
There is a small sircle hole, device is arranged to coil and data signal reception（14）Connection；Signal receives and arranges device（14）Inside it is provided with
Transmission line and outer computer（15）It is connected.
The course of work of the present invention：The model casing to complete is positioned on level ground, according to experimental program, in mould
Bottom and side wall laying sealing geotextiles make Anti-seeping technology in molding box, and successively uniformly closely knit lid paving tests soil sample layer and block in the case
Rock layers, the soil sample layer are soft silt layer, thickness 450mm, and block stone bed course is made of crushed rock filler, thickness 150mm.Wherein block
Stone bed course has mixed the filler particles for posting copper sheet, each different sizes for testing copper sheet on particle.Carried out according to requirement of experiment
When strong rammer is tested, it is thus necessary to determine that the drop-off positions of weight and fall away from it is correct that locating rod is placed in Position Scale top by manually
Groove location and fit closely, then sliding hook is linked up with by screw means.Start outer computer and metal detecting system
Power supply, on-test carry out.Weight is hung on hook with rope, high to change the lifting of hammer ram by adjusting the length of rope
Degree, thus it is possible to vary the tamping energy that single is rammed.After debugging, hold up weight and then loose one's grip, weight freely falling body is completed once
Ram.At this time by electromagnetic signal to posting the block stone location tracking of copper sheet, the signal processing for arranging device is received by signal, can
With the real-time display on the program interface of outer computer, the migration path of the filler under strong rammer Impact Load is obtained, this
Invention combines electromagnetic induction principle, simulates the migration path of high rheology weak soil filler under strong rammer, and exploration draws dynamic replacement mistake
The movement law of block stone, the soil body in journey, has more comprehensively deep with this mechanism of action reinforcing soft soil roadbed to heavy tamping replacement method
Understanding, be simple to manufacture, measurement result accurately and reliably.
Technological means disclosed in the present invention program is not limited only to the technological means disclosed in the above embodiment, further includes
Formed technical solution is combined by above technical characteristic.
Claims (8)
- A kind of 1. migration path detection experimental provision of filler during high rheology weak soil dynamic replacement, it is characterised in that：Including model Chamber, ram loading system, external observation system, metal detecting system and Displacement Analysis system.
- 2. the migration path detection experimental provision of filler during a kind of high rheology weak soil dynamic replacement according to claim 1, It is characterized in that：The upper opening that the model test box is made of base, side board, end face organic glass observation window Square structure, block stone bed course, high rheology Soft Soil Layer are equipped with model test box, is equipped with and posts in described piece of stone bed course from top to bottom The weak soil filler particles of sheet metal, base are arranged on model test box bottom；The loading system of ramming is made of locating rod, hook, Position Scale, weight, stent, the top of stent and model test box Portion corner is connected, and Position Scale top is equipped with groove, and outer wall indicates scale, and Position Scale is welded on frame upper, locating rod Across on Position Scale, locating rod lower part sets cavity, and card slot is equipped with cavity, is equipped with slide plate in card slot, it is described link up with and Slide plate is bolted, and weight is placed in hook lower section；The external observation system is made of former and later two organic glass observation windows, is fixed on the base of model test box and two Between side shield；The metal detecting system is arranged device and is formed by metal transmitting coil, receiving coil, data signal reception, and baffle interior is engraved Sky, metal transmitting coil, receiving coil are placed in baffle interior and fixation, and data signal reception arranges device and is positioned over model test box Outside；The Displacement Analysis system is made of external circuits signal with computer.
- 3. the migration path detection experimental provision of filler during a kind of high rheology weak soil dynamic replacement according to claim 1, It is characterized in that：The model test box bottom and inner wall are laid with sealing geotextiles.
- 4. the migration path detection experimental provision of filler during a kind of high rheology weak soil dynamic replacement according to claim 1, It is characterized in that：Stent is connected by bolt with the top corner of model test box.
- 5. the migration path detection experimental provision of filler during a kind of high rheology weak soil dynamic replacement according to claim 1, It is characterized in that：Position Scale top is undaform groove, and locating rod bottom surface is the arc convex surface supporting with groove.
- 6. the migration path detection experimental provision of filler during a kind of high rheology weak soil dynamic replacement according to claim 1, It is characterized in that：The a length of 1000mm of locating rod, the height of stent is 500mm, and the length of Position Scale is 800mm.
- 7. the migration path detection experimental provision of filler during a kind of high rheology weak soil dynamic replacement according to claim 1, It is characterized in that：Four metal transmitting coils are equipped with one side shield, four metal transmitting coils of homonymy, which are placed in, receives big line The inner side of circle.
- 8. the migration path detection experimental provision of filler during a kind of high rheology weak soil dynamic replacement according to claim 1, It is characterized in that：Baffle outer wall is provided with a small sircle hole, and the connection of device is arranged to coil and data signal reception；Signal, which receives, to be adjusted Put in device that there is provided transmission line to be connected with outer computer.
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| CN201711098063.5A CN107905202B (en) | 2017-11-09 | 2017-11-09 | The migration path of filler detects experimental provision when high rheology weak soil dynamic replacement |
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| CN201711098063.5A CN107905202B (en) | 2017-11-09 | 2017-11-09 | The migration path of filler detects experimental provision when high rheology weak soil dynamic replacement |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109469043A (en) * | 2018-11-21 | 2019-03-15 | 贵州正业工程技术投资有限公司 | A kind of multilayer block stone fill foundation dynamic replacement ruggedized construction and reinforcement means |
| CN110006797A (en) * | 2019-02-21 | 2019-07-12 | 太原理工大学 | It is a kind of measurement coal dust deposition with railway ballast change in depth chamber |
| CN110261211A (en) * | 2019-07-17 | 2019-09-20 | 中冶沈勘工程技术有限公司 | The thin sight visible model testing device and method of forced ramming reinforcing saturated sand foundation |
| CN110567870A (en) * | 2019-09-30 | 2019-12-13 | 辽宁工程技术大学 | Pile-soil interface friction visual test device and method |
| CN110794114A (en) * | 2019-10-18 | 2020-02-14 | 河海大学 | Method for measuring sand conveying rate of pebble bed ballast on basis of electromagnetic induction principle |
| CN111058437A (en) * | 2020-01-30 | 2020-04-24 | 福州大学 | Labor-saving ramming hammer and using method thereof |
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| CN105783975A (en) * | 2016-03-03 | 2016-07-20 | 同济大学 | Centrifuge test forced tamping simulation auxiliary test device |
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| JPH04329336A (en) * | 1991-05-02 | 1992-11-18 | Meisei Electric Co Ltd | Two-way signal transmitting system and signal repeater for cone penetration tester |
| CN105783975A (en) * | 2016-03-03 | 2016-07-20 | 同济大学 | Centrifuge test forced tamping simulation auxiliary test device |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109469043A (en) * | 2018-11-21 | 2019-03-15 | 贵州正业工程技术投资有限公司 | A kind of multilayer block stone fill foundation dynamic replacement ruggedized construction and reinforcement means |
| CN109469043B (en) * | 2018-11-21 | 2024-04-30 | 贵州正业工程技术投资有限公司 | Dynamic compaction replacement reinforcement structure and reinforcement method for multi-layer block stone filled foundation |
| CN110006797A (en) * | 2019-02-21 | 2019-07-12 | 太原理工大学 | It is a kind of measurement coal dust deposition with railway ballast change in depth chamber |
| CN110261211A (en) * | 2019-07-17 | 2019-09-20 | 中冶沈勘工程技术有限公司 | The thin sight visible model testing device and method of forced ramming reinforcing saturated sand foundation |
| CN110567870A (en) * | 2019-09-30 | 2019-12-13 | 辽宁工程技术大学 | Pile-soil interface friction visual test device and method |
| CN110794114A (en) * | 2019-10-18 | 2020-02-14 | 河海大学 | Method for measuring sand conveying rate of pebble bed ballast on basis of electromagnetic induction principle |
| CN110794114B (en) * | 2019-10-18 | 2021-09-28 | 河海大学 | Method for measuring sand conveying rate of pebble bed ballast on basis of electromagnetic induction principle |
| CN111058437A (en) * | 2020-01-30 | 2020-04-24 | 福州大学 | Labor-saving ramming hammer and using method thereof |
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| CN107905202B (en) | 2019-09-06 |
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