CN106759236A - Tidal cycle load consolidates weak soil experimental rig - Google Patents
Tidal cycle load consolidates weak soil experimental rig Download PDFInfo
- Publication number
- CN106759236A CN106759236A CN201611031215.5A CN201611031215A CN106759236A CN 106759236 A CN106759236 A CN 106759236A CN 201611031215 A CN201611031215 A CN 201611031215A CN 106759236 A CN106759236 A CN 106759236A
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- consolidates
- pump
- cycle load
- experimental rig
- model groove
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- 239000002689 soil Substances 0.000 title claims abstract description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 52
- 239000004576 sand Substances 0.000 claims abstract description 20
- 238000012544 monitoring process Methods 0.000 claims abstract description 16
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 15
- 238000007789 sealing Methods 0.000 claims abstract description 15
- 239000010959 steel Substances 0.000 claims abstract description 15
- 238000006073 displacement reaction Methods 0.000 claims abstract description 12
- 239000011148 porous material Substances 0.000 claims abstract description 10
- 239000004746 geotextile Substances 0.000 claims description 9
- 229920001903 high density polyethylene Polymers 0.000 claims description 6
- 239000004700 high-density polyethylene Substances 0.000 claims description 6
- 239000011521 glass Substances 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 239000004927 clay Substances 0.000 claims description 4
- 238000000605 extraction Methods 0.000 claims 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims 1
- 238000000967 suction filtration Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 10
- 238000007596 consolidation process Methods 0.000 abstract description 9
- 230000003014 reinforcing effect Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 description 6
- 230000008901 benefit Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 210000000476 body water Anatomy 0.000 description 1
- 210000002421 cell wall Anatomy 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 229920006262 high density polyethylene film Polymers 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
Classifications
-
- 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
- E02D3/10—Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Soil Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Agronomy & Crop Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
A kind of tidal cycle load consolidates weak soil experimental rig, including vacuum prepressing system, water circulation system, data acquisition device and computer；Vacuum prepressing system includes model groove, Soft Soil Layer, drain bar, sand bedding course, steel wire screwed filter tube, diaphragm seal, bottle,suction, vavuum pump, model groove surrounding upper edge is provided with " U " type sealing ditch, diaphragm seal is successively pressed into " U " type sealing ditch and forms confined space, displacement transducer is installed on diaphragm seal, multiple pore pressure meter is buried in model groove, digital pressure gauge is set in the sand bedding course.Institute's displacement sensors, pore pressure meter and digital pressure gauge are connected into computer by data acquisition device respectively；Water circulation system includes supply tank, water supply pump, draining water pump and two KG316T microcomputer time-controlled switchs.The device combines underwater vacuum precompression method reinforcing soft ground, and real-time monitoring consolidation effect using tidal cycle load.
Description
Technical field
The present invention relates to underwater vacuum precompression method reinforcing soft soil technical field, more particularly to a kind of tidal cycle load consolidation
Weak soil experimental rig, the device be applied to followed under bad load action in tide, using underwater vacuum precompression method reinforcing soft ground.
Background technology
Vacuum Preloading Method for Consolidation of Soft Soil Foundation technology is widely used to the fields such as harbour, highway, hydraulic engineering, and obtains
Huge economic and social benefit.Existing underwater vacuum precompression model test is also analyzed its reinforcement mechanism, is
The implementation of underwater vacuum prepressing reinforcement soft base technique is laid a good foundation.However, for how using tidal cycle load joint water
Lower vacuum method is more economical, more effectively reinforce that the research of soft soil foundation under water is rarely seen, to the consolidation of soil in process of the test
Degree, the variation monitoring of moisture content research it is few, it is a kind of using tidal cycle load joint underwater vacuum precompression it is desirable to have
The experimental rig of method reinforcing soft ground.
The content of the invention
The purpose of the present invention aims to provide a kind of tidal cycle load consolidation weak soil experimental rig, and the device is followed using tide
Ring load combines underwater vacuum precompression method reinforcing soft ground, and real-time monitoring consolidation effect.
As above conceive, the technical scheme is that：A kind of tidal cycle load consolidates weak soil experimental rig, including vacuum
Pre-pressing system, water circulation system, data acquisition device and computer；
The vacuum prepressing system include model groove, Soft Soil Layer, drain bar, sand bedding course, steel wire screwed filter tube, diaphragm seal,
Bottle,suction and vavuum pump；The model groove surrounding upper edge is provided with " U " type sealing ditch, and diaphragm seal is successively pressed into " U " type sealing ditch
Interior formation confined space, is provided with the displacement transducer for monitoring soil body average settlement on diaphragm seal, inject soft in model groove
Soil layer and embedded multiple pore pressure meter；The Soft Soil Layer top laying geotextiles, lay gravel layer in geotextiles, gravel layer top sets
Put sand bedding course；It is provided for monitoring the digital pressure gauge of sand bedding course vacuum, the bottom and top of sand bedding course in the sand bedding course
It is respectively provided with geotextiles；The steel wire screwed filter tube is embedded in gravel layer, and one end of steel wire screwed filter tube connects with drain bar, separately
One end is connected with bottle,suction, and vavuum pump is connected with bottle,suction；The drain bar is squeezed into Soft Soil Layer；It is described to be put down for monitoring the soil body
The displacement transducer that settles, pore pressure meter and pass through data acquisition device respectively for monitoring the digital pressure gauge of sand bedding course vacuum
It is connected into computer；
The water circulation system includes supply tank, water supply pump, draining water pump and two KG316T microcomputer time-controlled switchs,
Two KG316T microcomputer time-controlled switchs are connected with water supply pump and draining water pump respectively, and water supply pump is placed in supply tank,
Rubber tube being drawn to model groove top from water supply pump, draining water pump being placed in model groove, rubber is drawn from draining water pump
Manage water supply upper box part.
Above-mentioned vavuum pump is numerical control vavuum pump, and its negative pressure is maintained in any minizone between -108kPa~0kPa.
Above-mentioned drain bar using Yancheng City Hong Zhou engineering materials Co., Ltd provide c-type drain bar, its width be 100 ±
3mm, Hou Du≤4.5mm, Zong are to Tong Shui Liang≤60cm2/s。
Above-mentioned steel wire screwed filter tube is distributed in a ring in gravel layer.
Above-mentioned diaphragm seal uses HDPE diaphragm seals.
Above-mentioned diaphragm seal top is provided with two pieces of glass plates, and two displacement transducers for being used to monitor soil body average settlement are set
In the top of glass plate.
Above-mentioned diaphragm seal is successively pressed into " U " type and seals formation confined space in ditch by waterproof sealing clay.
The present invention compared with prior art, has the following advantages that：
1st, two KG316T microcomputer time-controlled switch timing controlled water pumps circuits replace break-make, hand over water pump constant duration
Temporary substitute is made, and is capable of achieving the water circulation flowing in water tank, model groove, reaches the purpose of tide simulation load.
2nd, by the sealing ditch of HDPE diaphragm seals press-in model groove upper edge, seal groove can be made to be internally formed confined space,
So as to preferably soil mass consolidation.
3rd, the pore pressure meter and the displacement transducer located at diaphragm seal top being embedded in weak soil will be tried by data acquisition device
Test the incoming computer of data, can real-time monitoring consolidation effect, system seal, also can real time record test data；
4th, by measuring the water yield in bottle,suction, can in computation model groove the soil body water content.Similarly, by settling amount
Can in computation model groove the soil body the degree of consolidation.
Brief description of the drawings
Fig. 1 is organigram of the invention.
Fig. 2 is HDPE film sealing detail drawing in the present invention.
Fig. 3 is that steel wire screwed filter tube is connected detail drawing with drain bar in the present invention.
Fig. 4 is the upward view of Fig. 3.
In figure：1-supply tank；2-water supply pump；3-draining water pump；4-rubber tube；5-KG316T microcomputer time controlleds
Switch；6-power supply；7-drain bar；8-pore pressure meter；9-steel wire screwed filter tube；10-displacement transducer；11-HDPE is sealed
Film；12-" U " types seal ditch；13-geotextiles；14-model groove；15-digital pressure gauge；16-bottle,suction；17-numerical control is true
Empty pump；17-1-data display screen；17-2-pressure gauge；18-data acquisition device；19-computer；20-sand bedding course；21-soft
Soil layer；22-glass plate；23-waterproof sealing clay；24-model cell wall；25-connector；26-rivet.
Specific embodiment
As shown in the figure：A kind of tidal cycle load consolidates weak soil experimental rig, including vacuum prepressing system, water circulation system
System, data acquisition device and computer.
First, the vacuum prepressing system includes model groove 14, Soft Soil Layer 21, drain bar 7, sand bedding course 20, the filter of steel wire screw thread
Pipe 9, HDPE diaphragm seals 11, bottle,suction 16 and vavuum pump 17.Model groove surrounding upper edge is provided with " U " type sealing ditch 12, and HDPE is close
Sealer 11 is successively pressed into " U " type and seals formation confined space in ditch 12 by waterproof sealing clay 23, and use is provided with diaphragm seal
Soft Soil Layer and embedded multiple pore pressure meter 8, Soft Soil Layer top laying soil are injected in the displacement transducer 10 of measurement sedimentation, in model groove
Work cloth 13, lays gravel layer in geotextiles 13, gravel layer top sets sand bedding course 20, is provided for monitoring vacuum in sand bedding course
Digital pressure gauge 15, the bottom of sand bedding course is respectively provided with geotextiles 13 with top, and steel wire screwed filter tube 9 is embedded in gravel layer,
One end of steel wire screwed filter tube 9 connects with drain bar 7, and the other end is connected with bottle,suction 16, and vavuum pump 17 is connected with bottle,suction 16,
Drain bar 7 is squeezed into Soft Soil Layer 21；It is described two by based on the displacement transducer 10, pore pressure for monitoring soil body average settlement 8 and use
Computer 19 is connected into by data acquisition device 18 respectively in the digital pressure gauge 15 of monitoring sand bedding course vacuum.
Above-mentioned vavuum pump 17 is numerical control vavuum pump, and its negative pressure is maintained in any minizone between -108kPa~0kPa.
The c-type drain bar that above-mentioned drain bar 7 is provided using Yancheng City Hong Zhou engineering materials Co., Ltd, its width is 100
± 3mm, Hou Du≤4.5mm, Zong are to Tong Shui Liang≤60cm2/s。
Above-mentioned steel wire screwed filter tube 9 is distributed in a ring in gravel layer.
2nd, when the water circulation system includes supply tank 1, water supply pump 2, draining water pump 3 and two KG316T micro computers
Control switch 5, two KG316T microcomputer time-controlled switchs 5 control water supply pump 2 and draining water pump 3 respectively.Water supply pump 2 is laid
In supply tank 1, rubber tube 4 is drawn to the top of model groove 14 from water supply pump 2, similarly, draining water pump 3 is placed in model groove
In 14, rubber tube 4 to the top of supply tank 1 is drawn from draining water pump 3.Supply-water pump 2 is controlled by KG316T microcomputer time-controlled switchs 5
Water supply time, after water level reaches predetermined altitude in model groove 14, water supply pump 2 is stopped, and is used to simulate flood tide load.Together
When draining water pump 3 is started by KG316T microcomputer time-controlled switchs 5, when water level drops to predetermined water level in model groove 14,
The control water pump 3 of KG316T microcomputer time-controlled switchs 5 is stopped, and is used to simulate ebb load, then repeatedly said process.
Acquisition system takes the lead in starting, and is zeroed after sensor values tend towards stability, and starts to monitor, records test data,
Then vacuum prepressing system, subsequent start-up water circulation system, until off-test are started.
Claims (7)
1. a kind of tidal cycle load consolidates weak soil experimental rig, it is characterised in that：Including vacuum prepressing system, water circulation system
System, data acquisition device and computer；
The vacuum prepressing system includes model groove, Soft Soil Layer, drain bar, sand bedding course, steel wire screwed filter tube, diaphragm seal, suction filtration
Bottle and vavuum pump；The model groove surrounding upper edge is provided with " U " type sealing ditch, and diaphragm seal is successively pressed into shape in " U " type sealing ditch
Into confined space, the displacement transducer for monitoring soil body average settlement is installed on diaphragm seal, Soft Soil Layer is injected in model groove
And embedded multiple pore pressure meter；The Soft Soil Layer top laying geotextiles, lay gravel layer in geotextiles, gravel layer top sets sand
Bed course；It is provided for monitoring the digital pressure gauge of sand bedding course vacuum in the sand bedding course, bottom and the top of sand bedding course are all provided with
Put geotextiles；The steel wire screwed filter tube is embedded in gravel layer, and one end of steel wire screwed filter tube connects with drain bar, the other end
It is connected with bottle,suction, vavuum pump is connected with bottle,suction；The drain bar is squeezed into Soft Soil Layer；It is described averagely to be sunk for monitoring the soil body
The displacement transducer of drop, pore pressure meter and it is connected into by data acquisition device respectively for monitoring the digital pressure gauge of sand bedding course vacuum
Computer；
The water circulation system includes supply tank, water supply pump, draining water pump and two KG316T microcomputer time-controlled switchs, two
KG316T microcomputer time-controlled switchs are connected with water supply pump and draining water pump respectively, and water supply pump is placed in supply tank, from confession
Water water pump draw rubber tube to model groove top, draining water pump is placed in model groove, from draining water pump extraction rubber tube to
Water supply upper box part.
2. tidal cycle load according to claim 1 consolidates weak soil experimental rig, it is characterised in that：Above-mentioned vavuum pump is
Numerical control vavuum pump, its negative pressure is maintained in any minizone between -108kPa~0kPa.
3. tidal cycle load according to claim 1 consolidates weak soil experimental rig, it is characterised in that：Above-mentioned drain bar is adopted
The c-type drain bar provided with Yancheng City Hong Zhou engineering materials Co., Ltd, its width is 100 ± 3mm, thick degree≤4.5mm, longitudinal direction
Tong Shui Liang≤60cm2/s。
4. tidal cycle load according to claim 1 consolidates weak soil experimental rig, it is characterised in that：Above-mentioned steel wire screw thread
Chimney filter is distributed in a ring in gravel layer.
5. tidal cycle load according to claim 1 consolidates weak soil experimental rig, it is characterised in that：Above-mentioned diaphragm seal is adopted
Use HDPE diaphragm seals.
6. tidal cycle load consolidates weak soil experimental rig according to claim 1 or 5, it is characterised in that：Above-mentioned sealing
Film top is provided with two pieces of glass plates, two tops that glass plate is arranged on for monitoring the displacement transducer of soil body average settlement.
7. tidal cycle load consolidates weak soil experimental rig according to claim 1 or 5, it is characterised in that：Above-mentioned sealing
Film is successively pressed into " U " type and seals formation confined space in ditch by waterproof sealing clay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611031215.5A CN106759236A (en) | 2016-11-18 | 2016-11-18 | Tidal cycle load consolidates weak soil experimental rig |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611031215.5A CN106759236A (en) | 2016-11-18 | 2016-11-18 | Tidal cycle load consolidates weak soil experimental rig |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106759236A true CN106759236A (en) | 2017-05-31 |
Family
ID=58970586
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611031215.5A Pending CN106759236A (en) | 2016-11-18 | 2016-11-18 | Tidal cycle load consolidates weak soil experimental rig |
Country Status (1)
| Country | Link |
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| CN (1) | CN106759236A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107655758A (en) * | 2017-08-29 | 2018-02-02 | 天津大学 | A kind of consolidation test method for simulating flux and reflux |
| CN107655759A (en) * | 2017-08-29 | 2018-02-02 | 天津大学 | A kind of consolidation testing device for simulating flux and reflux |
| CN110230313A (en) * | 2019-04-28 | 2019-09-13 | 中国市政工程华北设计研究总院有限公司 | Low Low Level drains vacuum pre-pressed soft soil foundation processing method |
| CN114112577A (en) * | 2021-11-23 | 2022-03-01 | 东华大学 | Device and method for preparing undisturbed soft clay sample by low-position vacuum preloading and prepressing |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20160057198A (en) * | 2014-11-13 | 2016-05-23 | 목포해양대학교 산학협력단 | Apparatus and Method of Scouring of Foundation |
| CN105970910A (en) * | 2016-06-01 | 2016-09-28 | 上海建研地基基础工程有限公司 | Well point plastic draining pipe film coating type vacuum preloading and dewatering preloading combined power consolidation method |
| CN206173945U (en) * | 2016-11-18 | 2017-05-17 | 天津城建大学 | Morning and evening tides circulation load concreties weak soil test device |
-
2016
- 2016-11-18 CN CN201611031215.5A patent/CN106759236A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20160057198A (en) * | 2014-11-13 | 2016-05-23 | 목포해양대학교 산학협력단 | Apparatus and Method of Scouring of Foundation |
| CN105970910A (en) * | 2016-06-01 | 2016-09-28 | 上海建研地基基础工程有限公司 | Well point plastic draining pipe film coating type vacuum preloading and dewatering preloading combined power consolidation method |
| CN206173945U (en) * | 2016-11-18 | 2017-05-17 | 天津城建大学 | Morning and evening tides circulation load concreties weak soil test device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107655758A (en) * | 2017-08-29 | 2018-02-02 | 天津大学 | A kind of consolidation test method for simulating flux and reflux |
| CN107655759A (en) * | 2017-08-29 | 2018-02-02 | 天津大学 | A kind of consolidation testing device for simulating flux and reflux |
| CN110230313A (en) * | 2019-04-28 | 2019-09-13 | 中国市政工程华北设计研究总院有限公司 | Low Low Level drains vacuum pre-pressed soft soil foundation processing method |
| CN114112577A (en) * | 2021-11-23 | 2022-03-01 | 东华大学 | Device and method for preparing undisturbed soft clay sample by low-position vacuum preloading and prepressing |
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