CN105464070B - The device and method of the deep silt soil base of tunneling boring high vacuum ground preloading - Google Patents
The device and method of the deep silt soil base of tunneling boring high vacuum ground preloading Download PDFInfo
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- CN105464070B CN105464070B CN201510980222.9A CN201510980222A CN105464070B CN 105464070 B CN105464070 B CN 105464070B CN 201510980222 A CN201510980222 A CN 201510980222A CN 105464070 B CN105464070 B CN 105464070B
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- vacuum
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- displacement hull
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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
- E02D3/10—Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Agronomy & Crop Science (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The present invention relates to Geotechnical Engineering foundation treatment technology field, more particularly to deep silt soil base processing technology field, the apparatus and method of especially a kind of deep silt soil base of tunneling boring high vacuum ground preloading.The present invention replaces traditional drain bar using tunneling boring high vacuum displacement hull, the displacement hull is in series by some drain bars and vacuum tube by many type joints, many type joints include two template interfaces and two cylinder structures, pass through the template interface tandem drain bar of many type joints, cast interface tandem vacuum tube.During silt soil base deep by the method for the invention vacuum pre-press reinforcing, negative pressure source is become to be dispersed throughout the multi-level vacuum action face of deep silt soil base by traditional surface single vacuum acting surface, pass through multi-level vacuum action face collective effect, high vacuum angle value is maintained in displacement hull tunneling boring, the native rate of consolidation of silt is significantly accelerated, the construction period is shortened, it is ensured that deep silt soil base integral reinforcing effect, simple and reliable, economy is used.
Description
Technical field
The present invention relates to Geotechnical Engineering foundation treatment technology field, more particularly to deep silt soil base processing technology field,
The device and application method of especially a kind of deep silt soil base of tunneling boring high vacuum ground preloading.
Background technology
Deep layer soft soil foundation processing is the technical barrier that harbour, water conservancy, traffic engineering construction are frequently encountered.Conventional at present
Soft-soil foundation treatment method has cement mixing pile method, draining concretion method, cushion, vacuum method etc..It was verified that vacuum is pre-
Platen press is a kind of soft-soil foundation treatment method of the economic and reliable grown up based on native consolidation theory.This method is earliest
Taught and proposed in nineteen fifty-two by the Jie Erman (Kjellman) of imperial ground institute of Sweden, by the theoretical developments and reality of decades
Application is trampled, the construction technology and design method of maturation have been formd at present, and it is actual to be widely used in engineering.This method exists
During implementation, vertical row water body (general using vertical drainage plate at present) is plugged in weak soil, and sealed with air-locked diaphragm seal
Place is reinforced, negative pressure is then formed in vertical drainage body by vacuum plant pumping, makes the moisture in weak soil in negative pressure load
In the presence of discharge, and then reach that reduction is become silted up native moisture content, the consolidation effect that improves soil strength.
However, there is a key technology bottleneck problem when handling deep soft soil foundation in technique of soft soil foundation treatment：Vacuum is born
Pressure is difficult to effectively be transferred to deep layer weak soil.During the technology is implemented, due to being hindered and smear effect by vertical drainage plate well
When being transmitted along drain bar to ground depth direction obvious linear loss can occur for influence, negative pressure of vacuum【Qiu Qingchang, Mo Hai
Drawdown analysis [J] the South China Science ＆ Engineering University journal (natural science of fluid in letter, the good Soft Ground Improved By Vacuum Preloadings vertical drainage bodies of Dong Zhi
Version) .2007 (03):132-136.；Zhu Qunfeng, Gao Changsheng, Yang Shouhua, wait vacuum transmission in ultra-soft silt ground treatments special
Journal of Sex Research [J] Geotechnical Engineering journal .2010 (09):1429-1433.】, cause vacuum to be difficult to effectively transmit to deep layer weak soil.
Therefore, when technique of soft soil foundation treatment is applied in deep layer soft soil foundation processing engineering, often occur because vacuum transmission depth is limited
And cause the soft base disposal effect of deep layer not satisfactory, and the pumpdown time is long, it is difficult to meet construction period.
It follows that a kind of device of the native foundation stabilization of the deep silt for finding the achievable effective vacuum preloading of deep layer weak soil and
Method, is this area technical problem urgently to be resolved hurrily.The invention provides a kind of deep silt soil of tunneling boring vacuum pre-press reinforcing
At the device of base and the method using the deep silt soil base of the device ground preloading, the reinforcing that deep layer weak soil/silt soil can be realized
Reason.
The content of the invention
In view of there is above-mentioned technical problem in the prior art, the defect that the present invention exists for prior art breaks through tradition
The shallow bottleneck of technique of soft soil foundation treatment soft soil foundation effective reinforcement depth there is provided one kind with can effectively improving Deep Thick Soft Ground
The device and its application method of the deep silt soil base of tunneling boring high vacuum ground preloading of base integral reinforcing effect.
The device of the deep silt soil base of tunneling boring high vacuum ground preloading of the present invention includes, vacuum extractor, true
Vacant duct system and tunneling boring high vacuum displacement hull, vacuum pipe system include supervisor and branch pipe, and one end of supervisor is with vacuumizing
Device is connected, and supervisor punishes out a branch pipe in the position of every row's displacement hull.The tunneling boring high vacuum displacement hull by drain bar,
Vacuum pipe and many types of splice combinations are formed by connecting, and many type joints include two template interfaces and two cast interfaces, by many
The template interface tandem drain bar of type joint, cast interface tandem vacuum tube.The length of the every drain bar and vacuum pipe
For 4-10m, the drain bar or vacuum pipe total length of the series connection are higher by design and plug depth 0.3m-0.5m, the vacuum tube
A diameter of 1cm-2cm in road, the total length of the tunneling boring high vacuum displacement hull is determined according to ground design reinforcement depth.It is described
Every branch pipe of vacuum pipe system is connected by connecting tube with the vacuum pipe, by connecting tube and hand-type joint with it is described
Drain bar is connected, entire row of having connected displacement hull, wherein, hand-type joint includes a template interface and a cast interface.
The method of the deep silt soil base of use said apparatus ground preloading of the present invention, is by following technical solution
Realize, comprise the following steps：
The first step, make tunneling boring high vacuum displacement hull --- the tunneling boring high vacuum displacement hull is by drain bar (draining
Its typical structure of plate is referring to the patent document that number of patent application is 200620014821.1《Drain bar》), vacuum pipe and many types of
Splice combinations are formed by connecting, and many type joints include two template interfaces and two cast interfaces, are connect by the template of many type joints
Mouth series connection drain bar, cast interface tandem vacuum tube.The length of every drain bar and vacuum pipe is 4-10m, the draining of series connection
Plate or vacuum pipe total length are higher by displacement hull design and plug depth 0.3m-0.5m, a diameter of 1cm-2cm of vacuum tube.
Second step, plug tunneling boring high vacuum displacement hull --- the pending soil layer of leveling, and inserted according to predetermined space
If displacement hull is to projected depth；
3rd step, pipeline connection --- ground surface on the scene lays the supervisor that one end is connected with vacuum extractor, and supervisor is every
A branch pipe is punished out in the position of row's displacement hull, and every branch pipe is connected by connecting tube with vacuum pipe, passes through connecting tube and hand
Type joint is connected vacuum pipe with the drain bar of tunneling boring high vacuum displacement hull, entire row of having connected displacement hull, wherein, hand-type joint
Including a template interface and a cast interface；
4th step, covering sealing --- at least one layer of geotechnique of covering on the pending soil layer of laying pipe-line system
Cloth, then lays at least one layer of diaphragm seal；
5th step, vacuum drainage consolidation --- open vacuum extractor, when under diaphragm seal vacustat in ＞ 85kPa
When, the stable high vacuum angle value in ＞ 70kPa of displacement hull tunneling boring realizes that deep silt soil base tunneling boring high vacuum draining is consolidated
Knot.
The apparatus and method of the deep silt soil base of tunneling boring high vacuum ground preloading of the present invention, are arranged using tunneling boring high vacuum
Water body replaces traditional drain bar, and negative pressure source is become to be dispersed throughout deep silt soil base by traditional surface single vacuum acting surface
Multi-level vacuum action face.By multi-level vacuum action face collective effect, negative pressure of vacuum can smoothly be transferred to the row in deep
Water plate, make the negative pressure of vacuum in the drain bar of entire depth section maintain high-level operation, and deep silt soil base is needed
Processing soil layer is effectively and rapidly reinforced, so as to greatly accelerate discharging consolidation, shortens the construction period, and ensure that
Deep silt soil base integral reinforcing effect, it is simple and reliable, it is economical and practical.
Brief description of the drawings
Fig. 1 is the structural representation of tunneling boring high vacuum displacement hull of the present invention and vacuum extractor；
Fig. 2 is the schematic diagram of many type joints of the present invention；
Fig. 3 is the schematic diagram of hand-type joint of the present invention.
Wherein, 1 is vacuum pipe, and 2 be drain bar, and 3 be many type joints, and 4 be tunneling boring high vacuum displacement hull, and 5 be supervisor,
6 be branch pipe, and 7 be vacuum extractor, and 8 be hand-type joint, and 9 be connecting tube, and 10 be geotextiles, and 11 be press mold ditch, and 12 connect for cast
Mouthful, 13 be template interface, and 14 be diaphragm seal.
Embodiment
Make lower explanation to technical scheme with specific embodiment below in conjunction with the accompanying drawings：
The method of the deep silt soil base of tunneling boring high vacuum ground preloading of the present embodiment adds in certain dyke vulnerable spots levee foundation
Gu implement in engineering, as shown in figure 1, Soft Soil Layer is distributed under the vulnerable spots complex geologic conditions, levee body in 20m depth boundses, it is soft
Soil thickness is big, moisture content is high, low intensity, and levee body sedimentation is unstable.
The device of the deep silt soil base of tunneling boring high vacuum ground preloading of the present embodiment, as shown in figure 1, including taking out true
Empty device 7, vacuum pipe system and tunneling boring high vacuum displacement hull 4, vacuum pipe system include supervisor 5 and branch pipe 6, supervisor 5
One end be connected with vacuum extractor 7, supervisor 5 punishes out a branch pipe 6 in the position of every row's displacement hull 4.The tunneling boring is high
Vacuum drainage body 4 is formed by connecting by the combination of drain bar 2, vacuum pipe 1 and many type joints 3, and many type joints 3 connect including two templates
Mouth 13 and two cast interfaces 12, pass through the series connection drain bar 2 of template interface 13 of many type joints 3, the series connection vacuum of cast interface 12
Pipeline 1；The every branch pipe 6 of the vacuum pipe system is connected by connecting tube 9 with the vacuum pipe 1, passes through the He of connecting tube 9
Hand-type joint 8 is connected with the drain bar 2, entire row of having connected displacement hull 4, wherein, hand-type joint 8 includes a template interface 13
With a cast interface 12.
The length of the every drain bar 2 and vacuum pipe 1 is 4-10m, the drain bar 2 or vacuum pipe 1 of the series connection
Total length is higher by design and plugs depth 0.3m-0.5m, a diameter of 1cm-2cm of the vacuum pipe 1, the tunneling boring high vacuum
The total length of displacement hull 4 is determined according to ground design reinforcement depth.
Said apparatus is when in use, it is necessary to which at least one layer of geotextiles 10 of ground on the scene covering, and laying at least one layer are sealed
Film 14.
Specific implementation step is as follows：
The first step, making tunneling boring high vacuum displacement hull 4 --- tunneling boring high vacuum displacement hull 4 is by drain bar 2, vacuum tube
Road 1 and the combination of many type joints 3 are formed by connecting, and many type joints 3 include two template interfaces 13 and two cast interfaces；By many types of
The series connection drain bar 2 of template interface 13 of joint 3, the series connection vacuum pipe 1 of cast interface 12.Wherein, tunneling boring high vacuum displacement hull 4
Total length passes through the template interface 13 of many type joints 3 respectively for projected depth 20m, 4 5.1m drain bar 2 and vacuum pipe 1
Connected with cast interface 12, vacuum pipe diameter 1.5cm.
Second step, smooth location and tunneling boring high vacuum displacement hull 4 --- place in the range of smooth stabilization zone is plugged, and
Displacement hull 4 is plugged to 20m depth with 1.0m interval on pending soil layer；
3rd step, pipeline connection --- lay the master that one end is connected with vacuum extractor 7 on pending soil layer surface
Pipe 5, supervisor 5 separates a branch pipe 6 in the position of every row's displacement hull, and each branch pipe 6 is connected by connecting tube 9 with vacuum pipe 1,
It is connected by connecting tube 9 and hand-type joint 8 with the drain bar 2 of tunneling boring high vacuum displacement hull 4, entire row of having connected displacement hull 4, its
In, hand-type joint 8 includes a template interface 13 and a cast interface 12.
4th step, covering sealing --- one layer of 300g/m2 soil is covered on the pending soil layer of laying pipe-line system
Work cloth 10, then lays 3 thickness degree not less than 0.12mm diaphragm seals 14, press mold ditch 11 is excavated on place periphery；
5th step, vacuum drainage consolidation --- vacuum extractor 7 is opened, when 14 times vacustats of diaphragm seal are in ＞
During 85kPa, the stable high vacuum angle value in ＞ 70kPa of the tunneling boring of displacement hull 4 realizes deep silt soil base tunneling boring high vacuum row
Water is consolidated.
After 90 days dispose, the levee foundation degree of consolidation reaches 95%, more than design load 90%, while different depth is soft after processing
The foundation bearing capacity of soil is improved significantly, and bearing capacity reaches 80kPa, and consolidation effect is notable.
In addition to the implementation, the present invention can also have other embodiment.All use equivalent substitution or equivalent transformation shape
Into technical scheme, all fall within the protection domain of application claims.
Claims (6)
1. a kind of device of the deep silt soil base of tunneling boring high vacuum ground preloading, described device includes vacuum extractor, vacuum
Pipe-line system and tunneling boring high vacuum displacement hull, vacuum pipe system include supervisor and branch pipe, one end of supervisor and vacuum means
Connection is put, supervisor punishes out a branch pipe in the position of every row's displacement hull, it is characterised in that the tunneling boring high vacuum displacement hull
It is formed by connecting by drain bar, vacuum pipe and many types of splice combinations, many type joints include two template interfaces and two casts connect
Mouthful, pass through the template interface tandem drain bar of many type joints, cast interface tandem vacuum tube；Every of the vacuum pipe system
Branch pipe is connected by connecting tube with the vacuum pipe, is connected, connected with the drain bar by connecting tube and hand-type joint
Entire row displacement hull, wherein, hand-type joint includes a template interface and a cast interface；The drain bar or vacuum of the series connection
Pipeline total length is higher by design and plugs depth 0.3m-0.5m.
2. a kind of method with the deep silt soil base of device ground preloading as claimed in claim 1, comprises the following steps：
The first step, the making tunneling boring high vacuum displacement hull, the tunneling boring high vacuum displacement hull is by drain bar, vacuum pipe
It is formed by connecting with many types of splice combinations, many type joints include two template interfaces and two cast interfaces, pass through many type joints
Template interface tandem drain bar, cast interface tandem vacuum tube；
Second step, plug tunneling boring high vacuum displacement hull；
3rd step, pipeline connection --- ground surface on the scene lay the supervisor that one end is connected with vacuum extractor, and supervisor is in every row row
A branch pipe is punished out in the position of water body, and every branch pipe is connected by connecting tube with vacuum pipe, is connect by connecting tube and hand-type
Head is connected with the drain bar of tunneling boring high vacuum displacement hull, entire row of having connected displacement hull, wherein, hand-type joint includes a template
Interface and a cast interface；
4th step, covering sealing --- at least one layer of geotextiles of covering on the pending soil layer of laying pipe-line system, so
At least one layer of diaphragm seal is laid afterwards；
5th step, vacuum drainage consolidation --- vacuum plant is opened, deep silt soil base tunneling boring high vacuum discharging consolidation is realized.
3. the method for the deep silt soil base of tunneling boring high vacuum ground preloading according to claim 2, it is characterised in that：Often
The length of drain bar described in root and vacuum pipe is 4-10m.
4. method according to claim 2, it is characterised in that：The drain bar or vacuum pipe total length of the series connection are higher by
Design plugs depth 0.3m-0.5m, a diameter of 1cm-2cm of the vacuum pipe.
5. method according to claim 2, it is characterised in that：The total length base area of the tunneling boring high vacuum displacement hull
Base design reinforcement depth is determined.
6. method according to claim 2, it is characterised in that：In 5th step, start under vacuum extractor, diaphragm seal
Vacustat is in ＞ 85kPa, the stable high vacuum angle value in ＞ 70kPa of displacement hull tunneling boring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510980222.9A CN105464070B (en) | 2015-12-23 | 2015-12-23 | The device and method of the deep silt soil base of tunneling boring high vacuum ground preloading |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510980222.9A CN105464070B (en) | 2015-12-23 | 2015-12-23 | The device and method of the deep silt soil base of tunneling boring high vacuum ground preloading |
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| CN105464070A CN105464070A (en) | 2016-04-06 |
| CN105464070B true CN105464070B (en) | 2017-11-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510980222.9A Expired - Fee Related CN105464070B (en) | 2015-12-23 | 2015-12-23 | The device and method of the deep silt soil base of tunneling boring high vacuum ground preloading |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106013044A (en) * | 2016-05-24 | 2016-10-12 | 江苏鸿基水利建设工程有限公司 | Air impacting drainage and double-faced vacuum preloading consolidation method of deep soft soil foundation |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63233113A (en) * | 1987-03-19 | 1988-09-28 | Masao Hashimoto | Compaction work of ground |
| CN102226337B (en) * | 2011-04-22 | 2012-07-04 | 河海大学 | Three-dimensional drain and construction method thereof |
| CN104452736B (en) * | 2014-12-05 | 2016-09-14 | 水利部交通运输部国家能源局南京水利科学研究院 | A kind of intermittent vacuum prepressing device and the method carrying out treatment of soft foundation thereof |
| CN104652412B (en) * | 2015-01-05 | 2017-07-04 | 温州大学 | A kind of method of the compound vacuum preloading soft soil foundation of deep layer |
| CN104929105B (en) * | 2015-06-09 | 2017-03-29 | 天津大学 | For the drain bar of batch (-type) ventilating vacuum prepressing water discharge |
| CN205259169U (en) * | 2015-12-23 | 2016-05-25 | 江苏鸿基水利建设工程有限公司 | Complete high vacuum preloading of section consolidates device of deep silt soil base |
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Effective date of registration: 20180718 Address after: 225000 Workers'Village No. 150, Yanfu East Road, Yangzhou City, Jiangsu Province Co-patentee after: Jiangsu water source Co.,Ltd. of east line of South to North Water Transfer Patentee after: JIANGSU HONGJI WATER SOURCE TECHNOLOGY CO.,LTD. Address before: 225000 150 workers' er village, Yanfu East Road, Guangling District, Yangzhou, Jiangsu. Co-patentee before: Jiangsu water source Co.,Ltd. of east line of South to North Water Transfer Patentee before: JIANGSU WATER CONSERVANCY CONSTRUCTION ENGINEERING CO.,LTD. |
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Granted publication date: 20171107 Termination date: 20211223 |