CN108411954A - Measure the device of draining plate benging water-flowing amount and the soft-soil foundation treatment method based on the device under soil pressure - Google Patents
Measure the device of draining plate benging water-flowing amount and the soft-soil foundation treatment method based on the device under soil pressure Download PDFInfo
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- CN108411954A CN108411954A CN201810442497.0A CN201810442497A CN108411954A CN 108411954 A CN108411954 A CN 108411954A CN 201810442497 A CN201810442497 A CN 201810442497A CN 108411954 A CN108411954 A CN 108411954A
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- water
- drain bar
- flowing amount
- pressure
- test chamber
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
Abstract
The invention discloses a kind of device of draining plate benging water-flowing amount under measurement soil pressure and based on the soft-soil foundation treatment method of the device, which includes equipped with keeping constant the hydraulic pressure system and outlet system of hydraulic pressure by the vertical test chamber for the drain bar that the soil body is wrapped up, the compression system, the vertical test chamber inner cavity soil body that apply lower pressure to the soil body.Under the conditions of the present invention can realize true fortifield village's pressure, it is bent the water-flowing amount test of drain bar, this water-flowing amount test result further extrapolates the best load time and discharge time used required for basement process as the truth in work progress.The water-flowing amount of bending drain bar under the conditions of being pressed due to true fortifield village more has practical reference to judge meaning.The difficult point of Novel drain board research and development not only can be solved with the selection of guiding construction drain bar, can also effectively guiding construction add and unload loading time, improve and reinforce efficiency, reduction project cost has a vast market foreground.
Description
Technical field
The present invention relates to geosynthetics detection technique field and method for processing foundation.
Background technology
In recent years, vacuum method has been widely used in Soft Ground in China, and plastic draining board is as ground
The vertical passageway of middle moisture discharge, helps speed up the consolidation of ground, it is made faster to reach the performance needed for engineering.However ground
The substantially sedimentation that processing procedure generates can cause to drain plate benging, so as to cause the reduction of water-flowing amount, and then influence consolidation effect.
Specifically, be because plastic draining board in engineer application with Soft Soil Layer together compressive deformation, in many feelings
Condition drain bar is not that drainage works are carried out under plumbness, is more often to work in the bent state.Exist at present
The drain bar longitudinal flowing water measuring of experimental determination can only simulate the sedimentation at soft soil consolidation initial stage and compress smaller stage water confining pressure condition
Under drain bar water flowing performance, but the drain bar for occupying the entire consolidation most of the time be in flexuosity, therefore with reality
Water flowing performance in the consistent fortifield village's pressure situation of border situation under drain bar flexuosity is still unintelligible and then heavy for soft soil foundation
Drop amount and add discharge time calculating it is all inaccurate.
Invention content
The first object of the present invention is intended to provide a kind of draining plate benging water-flowing amount test device considered under soil pressure, with
Drain bar water-flowing amount under soil pressure condition and flexuosity of the validity test closer to actual conditions.
The second object of the present invention is the soft-soil foundation treatment method of the test based on draining plate benging water-flowing amount, to obtain
Obtain more accurate effective Soft Ground mode.
The first object of the present invention is achieved through the following technical solutions：A kind of dress measuring draining plate benging water-flowing amount
It sets, it is characterised in that including：
Vertical test chamber, drain bar to be measured are placed in vertical test chamber inner cavity and are wrapped up by the soil body vertically,
And
Apply the compression system of lower pressure to the soil body, compression system includes being pressed on container cover above the soil body, being pressed on container
The jack of tops and the reaction frame above jack, reaction frame form the soil body with the common cooperation of jack downward
Pressure, and
The vertical test chamber inner cavity soil body keeps constant the hydraulic pressure system of hydraulic pressure, and hydraulic pressure system includes the storage for providing hydraulic pressure
Water container, tank are connected by connecting tube of intaking with the drain bar water inlet positioned at vertical test chamber bottom, and
Outlet system, outlet system include water storage container, and water storage container is held by being discharged connecting tube with positioned at vertical experiment
Drain bar water outlet at the top of device is connected.
Preferably, the surface layer of the soil body, which is laid, non-woven fabrics, and layer of sand is covered on non-woven fabrics and is flattened.
Preferably, there are reaction frame top plate and four stabilizer blades, top plate to be fixed at the top of stabilizer blade, and stabilizer blade, which stands on vertical experiment, to be held
Device pedestal surrounding.
Preferably, container cover periphery and vertical test chamber inner wall are dynamic cooperation.
Preferably, drain bar water inlet and water inlet connecting tube between connection and drain bar water outlet with water outlet connecting tube it
Between connection be all made of wrench cutting ferrule, one end of wrench cutting ferrule towards drain bar is in the form of a duckbill, and wrench cutting ferrule is towards connecting tube
One end is rounded, and connecting portion is cased with caulking gum mould.
The second object of the present invention obtains by the following technical programs：It is a kind of based on as above any measurement drain bar
It is bent the soft-soil foundation treatment method of the device of water-flowing amount, it is characterised in that plate benging is drained using as above any measurement
The device of water-flowing amount simultaneously carries out according to the following steps：
(1) vertical test chamber and reaction frame are installed；
(2) drain bar to be tested is put into vertical test chamber, drain bar water inlet is connected to storage with water inlet connecting tube
Water container；
(3) mud is layered around drain bar and is fitted into vertical test chamber to go out to the drain bar only exposed positioned at upper end
The mouth of a river；
(4) drain bar water outlet is connected to water storage container with water outlet connecting tube；
(5) in muck surface lid layer of non-woven fabric, one layer of sand is then covered above, is flattened；
(6) covered container lid；
(7) it is put into jack between reaction frame and container cover, applies pressure to setting value step by step；
(8) silt consolidation sedimentation value is recorded in real time, tests the draining plate benging water-flowing amount under jack pressure, is surveyed every 1h
It reads primary and continuously surveys reading for 24 hours until the bending water-flowing amount of water-flowing amount value stabilization, as fortifield village pressure；
(9) by bending water-flowing amount, it is average solid that the bunch hole mining radial direction draining for considering well resistance and smearing when influencing is calculated
Knot degree, according to the sedimentation absolute altitude of design requirement, extrapolate best load time and discharge time.
Under the conditions of the present invention can realize true fortifield village's pressure, it is bent the water-flowing amount test of drain bar, the test of this water-flowing amount
As a result as the truth in work progress, further extrapolate the best load time used required for basement process and
Discharge time.The water-flowing amount of bending drain bar under the conditions of being pressed due to true fortifield village more has practical reference to judge meaning.Not only may be used
With the selection of guiding construction drain bar, solve the difficult point of Novel drain board research and development, can also effective guiding construction add when unloading load
Between, it improves and reinforces efficiency, reduce project cost, have a vast market foreground.
Description of the drawings
Fig. 1 is the elevational schematic view of the draining plate benging water-flowing amount test device of the present invention.
Fig. 2 is the overlooking structure diagram of reaction frame 2.
Fig. 3 a are the front schematic view of wrench cutting ferrule 8.
Fig. 3 b bow for wrench cutting ferrule 8 to schematic diagram.
Fig. 3 c are the side schematic view of wrench cutting ferrule 8.
Wherein：1- test models bucket, 2- reaction frames, 2.1- upstanding studs, 3- stainless steel covers, 4- jack, 5- constant heads
Case, 6- water outlet water storage barrel, 7- water outlet connecting tube, 8- wrench cutting ferrule, 8.1- duckbills end, 8.2- round noses, 9- water inlet connecting tube,
10- drain bars, 11- mud.
Specific implementation mode
The device of plate benging water-flowing amount is drained for a kind of measurement of the present invention as shown in Figure 1 comprising：One vertical experiment is held
Device, to the soil body apply straight down the compression system of pressure, vertical test chamber inner cavity the soil body keep constant the water of hydraulic pressure
Pressure system and the outlet system for accommodating drain bar water outlet.
Specifically, which includes a test model bucket 1, and wrench is inserted into 10 lower end of drain bar to be measured
Cutting ferrule 8 simultaneously wraps up rubber membrane, is connected to water inlet pipe 9, stands in bucket and is wrapped up by the soil body (mud 11), and 10 upper end of drain bar is inserted into
Wrench cutting ferrule 8 simultaneously wraps up rubber membrane, is connected to outlet pipe 9.The surface of mud 11, which is laid, non-woven fabrics, is covered on non-woven fabrics
10mm layers of sand simultaneously flatten.
The compression system for applying lower pressure to the soil body includes being pressed on stainless steel cover 3 above mud, being pressed on stainless steel caping
The jack 4 in portion and the reaction frame 2 above jack 4, reaction frame form the soil body with the common cooperation of jack downward
Pressure.Stainless steel cover is positioned on drain bar and weak soil (mud), and periphery is dynamic cooperation with test model barrel inner wall, right
Sealing and pressurization are played inside model bucket.There are reaction frame top plate and four stabilizer blades, top plate to be fixed at the top of stabilizer blade, and stabilizer blade is vertical
In vertical test chamber pedestal surrounding.When jack top pressure reaction frame top plate, since ceiling location is fixed, reaction force makes
Jack is pressed downward, and is pushed to be located at the soil body below jack, is provided vertical pressure to the soil body, simulated to drain bar
The effect of fortifield village.
Hydraulic pressure system includes the ordinary water head case 5 for providing hydraulic pressure, and ordinary water head case 5 is by water inlet connecting tube 9 and positioned at test mould
The drain bar water inlet of 1 bottom of type bucket is connected.Ordinary water head case is made of organic glass, is equipped with gap and water inlet, ensures water
Head i=0.5.
Outlet system includes water outlet water storage barrel 6, and water outlet water storage barrel 6 is by being discharged connecting tube 7 and being located at test model bucket top
The drain bar water outlet in portion is connected.Water outlet water storage barrel is made of organic glass, above has scale, can survey reading water in real time.
Company between connection and drain bar water outlet between drain bar water inlet and water inlet connecting tube and water outlet connecting tube
It connects and is all made of wrench cutting ferrule 8, one end of wrench cutting ferrule towards drain bar is in the form of a duckbill, and one end of wrench cutting ferrule towards connecting tube is in
Circle, and connecting portion is cased with caulking gum mould, and it is watertight to play the role of sealing.
The present invention is implemented according to the following steps：
(1) test model bucket 1, reaction frame and the ordinary water head case 5 in experimental rig are installed as shown in Figure 1；
(2) it puts the drain bar of 1.2m long to be tested into test model bucket 1, and wrench cutting ferrule 8 is inserted into lower end, is connected with water inlet
Drain bar water inlet is connected to by take over 9 with ordinary water head case 5, and blend rubber Membrane cover is lived at drain bar lower end and wrench cutting ferrule 8, to prevent
Leak；
(3) mud (scene directly takes or configures certain water content mud and simulates field condition) is divided around drain bar
Layer is fitted into test model bucket 1, until 1m high；
(4) wrench cutting ferrule 8 is inserted into drain bar upper end, by drain bar water outlet and water storage barrel 6 is discharged with water outlet connecting tube 7
Connection, blend rubber Membrane cover is lived at drain bar lower end and wrench cutting ferrule 8, with preventing water leakage；
(5) in the non-woven fabrics of one layer of 2mm of silt soil surface cover, sand (the leveling work of one layer of 10mm thickness is then covered above
With)；
(6) stainless steel cover 3 is added；
(7) it is put into jack 4 between reaction frame 2 and stainless steel cover 3, applies pressure to 350kPa step by step；
(8) silt consolidation sedimentation value is recorded in real time, tests the draining plate benging water-flowing amount under jack pressure, is surveyed every 1h
It reads primary and continuously surveys reading for 24 hours until water-flowing amount value stabilization.
By the bending water-flowing amount q for fortifield village's pressure that test result obtainsw, consideration is calculated according to following formula (1)~formula (4)
Well hinders and smears the consolidation factor F of bunch hole mining when influencing；
According to the sedimentation absolute altitude of design requirement, by average degree of consolidationFormer field before sedimentation absolute altitude/reinforcing of=design requirement
Ground absolute altitude needs average degree of consolidation to be achieved after calculating reinforcing
Load time t is finally calculated by formula (5), in conjunction with the load time t that goes into operation1, derive best unloading time t2.From
And achieve the purpose that effective guiding construction, construction efficiency is improved, project cost is reduced.Steps are as follows for calculating：
F=Fn+Fs+Fr (4)
T=t2-t1 (6)
In formula：--- bunch hole mining radially drains average degree of consolidation when consolidation time t；
kh--- natural soil layer horizontal osmotic coefficient (cm/s)；
ks--- the horizontal osmotic coefficient of smear zone soil can use ks=(1/5~1/3) kh(cm/s)；
S --- smear zone diameter dsVertical shaft diameter dwRatio, can use s=2.0~3.0, moderate sensitivity cohesive soil is taken low
Value, high level is taken to highly sensitive cohesive soil；
L --- shaft depths (cm)；
qw--- the bending water-flowing amount (cm of fortifield village's pressure3/s)；
ck--- native horizontal direction discharging consolidation coefficient (cm2/s)；
de--- effective draining diameter of vertical shaft；
N --- drain spacing ratio.
Claims (6)
1. a kind of measuring the device for draining plate benging water-flowing amount under soil pressure, it is characterised in that including：
Vertical test chamber, drain bar to be measured are placed in vertical test chamber inner cavity and are wrapped up by the soil body vertically, and
Apply the compression system of lower pressure to the soil body, compression system includes being pressed on container cover above the soil body, being pressed on container caping
The jack in portion and the reaction frame above jack, cooperation forms the soil body downward pressure to reaction frame jointly with jack
Power, and
The vertical test chamber inner cavity soil body keeps constant the hydraulic pressure system of hydraulic pressure, and hydraulic pressure system includes the water storage appearance for providing hydraulic pressure
Device, tank are connected by connecting tube of intaking with the drain bar water inlet positioned at vertical test chamber bottom, and
Outlet system, outlet system include water storage container, and water storage container is by being discharged connecting tube and being located at vertical test chamber top
The drain bar water outlet in portion is connected.
2. according to claim 1 measure the device for draining plate benging water-flowing amount under soil pressure, it is characterised in that：The soil body
Surface layer, which is laid, non-woven fabrics, and layer of sand is covered on non-woven fabrics and is flattened.
3. according to claim 1 measure the device for draining plate benging water-flowing amount under soil pressure, it is characterised in that：Reaction frame
With top plate and four stabilizer blades, top plate is fixed at the top of stabilizer blade, and stabilizer blade stands on vertical test chamber pedestal surrounding.
4. according to claim 1 measure the device for draining plate benging water-flowing amount under soil pressure, it is characterised in that：Container cover
Periphery is dynamic cooperation with vertical test chamber inner wall.
5. according to claim 1 measure the device for draining plate benging water-flowing amount under soil pressure, it is characterised in that：Drain bar
Connection between connection and drain bar water outlet between water inlet and water inlet connecting tube and water outlet connecting tube is all made of wrench card
Set, one end of wrench cutting ferrule towards drain bar is in the form of a duckbill, and one end of wrench cutting ferrule towards connecting tube is rounded, and connecting portion
It is cased with caulking gum mould.
6. draining the soft of the device of plate benging water-flowing amount under a kind of measurement soil pressure based on as described in Claims 1 to 5 is any
Native method for processing foundation, it is characterised in that using the dress of the measurement draining plate benging water-flowing amount as described in Claims 1 to 5 is any
It sets and carries out according to the following steps：
(1) vertical test chamber and reaction frame are installed；
(2) drain bar to be tested is put into vertical test chamber, drain bar water inlet is connected to water storage with water inlet connecting tube to be held
Device；
(3) mud is layered to be fitted into vertical test chamber around drain bar and is discharged to the drain bar only exposed positioned at upper end
Mouthful；
(4) drain bar water outlet is connected to water storage container with water outlet connecting tube；
(5) in muck surface lid layer of non-woven fabric, one layer of sand is then covered above, is flattened；
(6) covered container lid；
(7) it is put into jack between reaction frame and container cover, applies pressure to setting value step by step；
(8) silt consolidation sedimentation value is recorded in real time, tests the draining plate benging water-flowing amount under jack pressure, is surveyed every 1h and is read one
It is secondary and continuously survey and read for 24 hours until water-flowing amount value stabilization, the as bending water-flowing amount of fortifield village's pressure；
(9) by bending water-flowing amount, the bunch hole mining radial direction draining average degree of consolidation considered when well resistance and smearing influence is calculated,
According to the sedimentation absolute altitude of design requirement, best load time and discharge time are extrapolated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810442497.0A CN108411954A (en) | 2018-05-10 | 2018-05-10 | Measure the device of draining plate benging water-flowing amount and the soft-soil foundation treatment method based on the device under soil pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810442497.0A CN108411954A (en) | 2018-05-10 | 2018-05-10 | Measure the device of draining plate benging water-flowing amount and the soft-soil foundation treatment method based on the device under soil pressure |
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| Publication Number | Publication Date |
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| CN108411954A true CN108411954A (en) | 2018-08-17 |
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| CN201810442497.0A Pending CN108411954A (en) | 2018-05-10 | 2018-05-10 | Measure the device of draining plate benging water-flowing amount and the soft-soil foundation treatment method based on the device under soil pressure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113686650A (en) * | 2021-08-11 | 2021-11-23 | 北京交通大学 | Lateral confining pressure loading equipment for undisturbed soil of sludge |
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| CN208251192U (en) * | 2018-05-10 | 2018-12-18 | 中交四航工程研究院有限公司 | Measure the device that plate benging water-flowing amount is drained under soil pressure |
-
2018
- 2018-05-10 CN CN201810442497.0A patent/CN108411954A/en active Pending
Patent Citations (6)
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| WO2010028547A1 (en) * | 2008-09-11 | 2010-03-18 | 中国科学院武汉岩土力学研究所 | Stereoscopic network drainage device for accelerating water drainage consolidation velocity of hydraulic mud fill |
| KR20110050577A (en) * | 2010-10-14 | 2011-05-16 | 이성수 | Horizontal drain-board for the soft ground |
| CN102392448A (en) * | 2011-09-28 | 2012-03-28 | 上海强劲地基工程股份有限公司 | Soft foundation reinforced structure combined by long and short drain boards and construction method thereof |
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Non-Patent Citations (1)
| Title |
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| 刘贞;于庆文;童建国;: "塑料排水板加固软土地基长期工作性能模型试验研究", 电力勘测设计, no. 04, pages 5 - 9 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113686650A (en) * | 2021-08-11 | 2021-11-23 | 北京交通大学 | Lateral confining pressure loading equipment for undisturbed soil of sludge |
| CN113686650B (en) * | 2021-08-11 | 2023-12-19 | 北京交通大学 | Lateral confining pressure loading equipment for undisturbed soil of sludge |
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