CN101349054A - Self-seal vacuum pre-press reinforcing foundation technical method - Google Patents
Self-seal vacuum pre-press reinforcing foundation technical method Download PDFInfo
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- CN101349054A CN101349054A CNA2007100581584A CN200710058158A CN101349054A CN 101349054 A CN101349054 A CN 101349054A CN A2007100581584 A CNA2007100581584 A CN A2007100581584A CN 200710058158 A CN200710058158 A CN 200710058158A CN 101349054 A CN101349054 A CN 101349054A
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Abstract
The invention relates to a technical method for reinforcing foundation by self-sealing and vacuum prepressing, which adopts a mode of mounting a drainage plate self-sealing device and connecting an air suction and drainage connecting pipe system to discharge pore water in soft soil foundation for reinforcing the foundation; drainage plates and the drainage plate self-sealing device are driven into the foundation needing drainage and reinforcement in rank; and the drainage plate self-sealing device is connected to the air suction and drainage connecting pipe system and then a vacuum pump. The drainage plates and the drainage plate self-sealing device are arrayed according to a matrix and driven to the foundation; the vacuum pump is connected with a main pipe of the air suction and drainage connecting pipe system; the main pipe is connected with a plurality of rows of parallel branched pipes; two sides of the branched pipes are connected with a plurality of connecting branched pipes which are connected with a water and air suction pipe of the air suction and drainage plate self-sealing device. The method saves a plastic sealed film for reinforcing the ground surface, a horizontal drainage undercourse, total filter pipes, a film outgoing device and a film pressing sealed ditch in the common vacuum prepressing, simplifies the construction procedure, has convenient and rapid construction, shortens the construction period, saves mass engineering material, manpower and engineering investment.
Description
Technical field
The invention belongs to a kind of foundation reinforcement method of civil engineering groundwork soil reinforcing technique.Be particularly related to a kind of self-seal vacuum pre-press reinforcing foundation technical method.
Background technology
Vacuum precompression consolidating method of soft soil foundation is beginning in 1980 experimental study of my institute, and classify country " six or five " key scientific and technological projects as in nineteen eighty-three, gain the national patent and the outstanding prize of the achievement of Chinese patent innovation and creation, country " six or five " tackling of key scientific and technical problems excellent prize, the national science and technology achievement first prize.Now, this method is not only in the water transport industry, and in national capital construction industry always by extensive and a large amount of application, and listed in a plurality of ministerial level ground standards.Some foreign scholars come domestic also usually understand vacuum preloading situation and visit scene.
Vacuum prepressing reinforcement soft soil base, particularly during super soft ground, can the instantaneous disposable 8T/m that applies
2Above prefabricating load, ground can be because of once not loading too fast, excessive unstable failure.During this method ground stabilization, can not produce the outside horizontal compression of side direction, and near structure are produced extrusion damage as preloading.It is compared with preloading commonly used, does not need a large amount of preloading materials, and environmental pollution is few, and sleety weather is reinforced as usual, and the duration shortens 1/3, energy consumption saves 1/3, construction costs reduces by 1/3, and its economic benefit and social benefit are obvious; But, need spread the thick horizontal sand cushion of 30～40cm when constructing by land owing to vacuum method, need spread the thick horizontal sand cushion of 1～1.5m at sea.This high-quality medium coarse sand not only lacks, and price is more expensive, thereby has improved construction costs.In addition, three layers of high-quality plastics diaphragm seal need be laid in the vacuum method face of land, need add labour movement to on-the-spot.Once reinforcing area now is 30,000 m
2, major limitation is in maximum heat sealable one-tenth 30,000 m of a diaphragm seal
2Due to, still can increase otherwise once reinforce area.When moreover lay at large tracts of land diaphragm seal scene like this, a large amount of labours of disposable needs (tens people even up to a hundred people).At the deficiency of above-mentioned former vacuum preloading, and invent this kind self-seal vacuum pre-press reinforcing foundation technical, can make vacuum method perfect more.
Summary of the invention
Technical problem to be solved by this invention is: a kind of self-seal vacuum pre-press reinforcing foundation technical method is provided.The objective of the invention is to cancel diaphragm seal, sand cushion and chimney filter, simplified the vacuum method working procedure, shortened the duration, saved material, reduced the construction costs of vacuum preloading.
Technical scheme of the present invention is:
A kind of self-seal vacuum pre-press reinforcing foundation technical method, it is characterized in that: adopt self-seal device of water drain plate and the mode of bleeding the drainage connecting pipe system and be connected vacuum pump to be set to discharge pore water in the soft foundation with consolidated subsoil, band drain and self-seal device thereof arranged in needing the ground of stabilization by drainage squeeze in the ground, and connect vacuum pump again after self-seal device of water drain plate is connected to the drainage connecting pipe system of bleeding.
Band drain and self-seal device thereof are arranged according to matrix and are squeezed in the ground, connect the drainage connecting pipe system of bleeding, vacuum pump 6 connects trunk 5 pipes of this system, main pipe connects parallel plurality of rows arm 4, connect a plurality of connecting branches 3 in the both sides of arm, connecting branch connects the band drain sealing air exhaust cap of the exhaust tube that draws water of self-seal device of water drain plate again.
Described self-seal device of water drain plate, form by the seal that wraps up or be bonded in band drain top and the exhaust tube that draws water, the band drain bottom surface is opened wide, the band drain end face also be open wide but to be placed in the seal of self-seal device, seal around the top of band drain plate body, seal wraps up or is bonded in the top of band drain plate body.
The seal of self-seal device of water drain plate is box-shaped tube seal height 50～500mm, wide about 105～100mm.The exhaust tube that draws water of self-seal device is the quarter bend cornue, aperture 12～17mm.The material of band drain is plastics or papery.
Superiority of the present invention and technique effect
Superiority
1. saved in the general vacuum preloading 2～3 layers of plastic seal film reinforcing the face of land, horizontal drainage bed course, all chimney filter, go out the press mold sealing ditch around film device and the stabilization zone;
2. simplified construction sequence, convenient and quick construction, thereby reduction of erection time;
3. as above-mentioned 1. as described in, not only saved a large amount of engineering materials, also saved a large amount of manpowers (transportation of diaphragm seal and laying, sealing ditch dig and fill out etc.), thereby saved construction investment.
Technique effect
Can reach-the above vacuum pre-press reinforcing effect of 80kPa.
Description of drawings
Fig. 1 is the self-seal device of water drain plate front view
Fig. 2 is the self-seal device of water drain plate sectional side view
Fig. 3 is the cross-sectional figure of self-seal device of water drain plate
Fig. 4 is that self-seal device of water drain plate is squeezed into the subgrade schematic diagram
Fig. 5 is the drainage connecting pipe System planes arrangement diagram of bleeding
1 band drain sealing air exhaust cap, 2 hose couplings, 3 connecting branches, 4 arms, 5 main pipes, 6 vacuum pumps
The specific embodiment
A kind of self-seal vacuum pre-press reinforcing foundation technical method, adopt parcel or be bonded in the self-seal device (as Fig. 1,2,3) on band drain top and the mode that is connected the drainage connecting pipe system of bleeding is discharged pore water in the soft foundation with consolidated subsoil, self-seal device of water drain plate arranged in needing the ground of stabilization by drainage squeeze into (as Fig. 4) in the ground, and self-seal device of water drain plate is connected vacuum pump with the drainage connecting pipe system of bleeding.(as Fig. 5)
Band drain and self-seal device thereof are arranged according to matrix and are squeezed in the ground, connect the drainage connecting pipe system of bleeding, vacuum pump connects the main pipe of this system, main pipe connects parallel plurality of rows arm, connect a plurality of connecting branches in the both sides of arm, connecting branch connects the exhaust tube that draws water of self-seal device of water drain plate again.
Self-seal device of water drain plate as shown in Figure 1, 2, 3, form by the seal on band drain top and the exhaust tube that draws water, band drain plate body top and bottom are opened wide, and seal around the top of band drain plate body, and seal connects or be bonded in the top of band drain plate body.
The seal on band drain top is the box-shaped tube, seal height 50～500mm., wide about 100～105mm.The exhaust tube that draws water of self-seal device is the quarter bend cornue, aperture 12～17mm.
1) self-seal device of water drain plate is referring to Fig. 1,2,3
Band drain can be plastic draining board or papery band drain.Band drain has relatively shortened the drainage distance in the foundation soil as the vertical drainage passage of consolidation, has also greatly accelerated the consolidation rate of foundation soil, plays crucial effects in consolidation; In order to have simplified the vacuum method working procedure, saved material, to have reduced cost, reduction of erection time, as shown in Figure 1, special at band drain top parcel self-seal device, its effect is, utilize it to make sealed that part of band drain and atmospheric isolation, under the situation of no diaphragm seal, no sand cushion, be convenient to directly band drain be vacuumized operation.Can make reduction of the pore water pressure in the ground or directly draining in the band drain influence basin by it, to reach the purpose of quickening ground consolidation.
According to the soil property situation of foundation soil, the sealing height of self-seal device of water drain plate is about 5～50cm.After it and band drain all insert ground, can make band drain and face of land atmosphere that separation layer about 50cm is arranged, carry out vacuum pre-press reinforcing thereby form the thick original soil layer in the following 50cm left and right sides, the face of land as diaphragm seal.Its original soil layer can be the cohesive soil of former sedimentary soil or new hydraulic reclamation etc.
The seal of self-seal device of water drain plate can be the method that class materials such as polypropylene or other plastics, reinforcement rubber, metal species wrap up plastic draining boards.Also can be with the method for smearing colloidal materials about the about 50cm in band drain upper end, or above both combination, and other encapsulating method.UNICOM the exhaust tube that draws water on the seal, and two parts constitute altogether.
The technical characterictic of self-seal device of water drain plate:
1. the seal of this device is by all kinds of material parcel such as engineering plastics, colloid, reinforcement rubber, metal plastic draining board, also can will smear colloidal materials about the about 50cm in band drain upper end, or above both combination, and the self-seal device seal of the different shape that constitutes of other encapsulating method.Easy to connect, rapid when this device uses, and can be recycled.
2. not using under the condition that increases other material, equipment, can directly vaccum-pumping equipment be connected with self-seal device of water drain plate and can vacuumize operation to each band drain.Can save diaphragm seal and press mold sealing ditch in the general vacuum preloading.
3. self-seal device of water drain plate has very strong tightness, its resistance to compression, tension, counter-bending, anti-aging, water passing capacity and toughness, and all meet the demands.
2) the drainage connecting pipe system of bleeding
During former vacuum preloading, water in the ground is discharged from vertical drain, be discharged to earlier in the horizontal drainage bed course (as sand cushion, sand quilt, geotextiles etc.), then be pooled in the chimney filter in the horizontal drainage bed course, be extracted into outside the diaphragm seal of consolidated subsoil by jet pump by going out film device.
This method is with gutter system substitution level sand mat of subgrade and the chimney filter of bleeding.The draining connecting piece system of bleeding be with 3 inches pipes as main pipe, on main pipe, set out arm according to the spacing of band drain, its arm diameter is identical and continuous with the caliber of the exhaust tube that draws water of self-seal device of water drain plate, as shown in Figure 5.Water in this method consolidated subsoil is discharged from vertical drain, directly be discharged in the drainage connecting pipe system of bleeding, when this system with after jet pump links to each other, can be extracted into beyond the consolidated subsoil by jet pump.
Fig. 5 seals the gutter System planes arrangement diagram of bleeding
The draining connecting piece system of bleeding can adopt polypropylene or other plastic material, perhaps reinforcement rubber, metal species material.But their resistance to compression, tension, counter-bending, anti-aging, toughness and water passing capacity should meet the demands.
The technical characterictic of the draining connecting piece system of bleeding:
1. this system is made of the draining connecting piece system of bleeding of different shape all kinds of materials such as engineering plastics, reinforcement rubber, metals.Easy to connect during use, rapid, and can be recycled.
2. this system has replaced horizontal drainage bed course and the chimney filter in the former vacuum preloading.
3. the draining connecting piece system of bleeding has very strong tightness, and its resistance to compression, tension, counter-bending, anti-aging, toughness and water passing capacity should meet the demands.
The specific embodiment is as follows:
1. design meets the self-seal device of water drain plate of concrete engine request and the draining connecting piece system of bleeding with processing;
2. carry out the construction of band drain and self-seal device thereof behind the smooth place;
3. connect the draining connecting piece system of bleeding;
The arm of the draining connecting piece system of 4. will bleeding docks with the exhaust tube that draws water of self-seal device of water drain plate, adopts flexible pipe closely to connect with pipe collar or fibril, prevents gas leakage;
5. vaccum-pumping equipment is connected in the gutter system of bleeding, and formally vacuumizes and begins vacuum pre-press reinforcing;
6. remove the self-seal device of water drain plate and the draining connecting piece system of bleeding, adopt other method (mix and stir as vibroroller cmpacting, shallow-layer etc.) to reinforce the 0.5m left and right sides, top layer foundation soil.
Present technique has been finished indoor model test; Formally carry out on-the-spot actual engineering test.Self-seal vacuum pre-press reinforcing foundation technical comprises:
1) present technique is a kind ofly not need ad hoc diaphragm seal, go out press mold sealing ditch around film device and the stabilization zone, does not also need the vacuum pre-press reinforcing foundation method of ad hoc horizontal drainage bed course and chimney filter;
2) band drain adopts the band drain of conventional plastic draining board or other texture material.
3) self-seal device of water drain plate can adopt class materials such as various industrial plastics, colloid, reinforcement rubber, various metals to constitute the different shape body.But no matter take which kind of shape, all need have very strong tightness, and can reach the resistance to compression, tension of designing requirement, counter-bending, anti-aging, toughness and water passing capacity.
4), determine the length of self-seal device of water drain plate according to the character of reinforcing area topsoil.Generally about 50～500mm; Self-seal device top or side are provided with connecting hole, according to comprehensive definite nozzle diameters such as branch diameter of the gutter system of bleeding, generally about 16mm.The exhaust tube that draws water that is provided with by self-seal device of water drain plate top or side can directly link to each other with the arm of the draining connecting piece system of bleeding.
5) the draining connecting piece system of bleeding can adopt materials such as various industrial plastics, reinforcement rubber, various metals to constitute the different shape body.But no matter take which kind of shape, all need have very strong tightness, and can reach the resistance to compression, tension of designing requirement, counter-bending, anti-aging, toughness and water passing capacity.
6) bleed on the main pipe of draining connecting piece system, press matrix and arrange or other arrangements arm.The main pipe diameter should satisfy the requirement that all are pooled to each arm water yield summation of this main pipe, generally about 3 inches.The diameter of its arm should be consistent with the diameter of the exhaust tube that draws water on the self-seal device of water drain plate and link to each other.Its tube pitch should be identical with the spacing of prefabricated drain of vacuum pre-press reinforcing design.
Claims (4)
1, a kind of self-seal vacuum pre-press reinforcing foundation technical method, it is characterized in that: adopt self-seal device of water drain plate and the mode that is connected the drainage connecting pipe system of bleeding to be set to discharge pore water in the soft foundation with consolidated subsoil, band drain and self-seal device thereof arranged in needing the ground of stabilization by drainage squeeze in the ground, and connect vacuum pump again after self-seal device of water drain plate is connected to the drainage connecting pipe system of bleeding.
2, self-seal vacuum pre-press reinforcing foundation technical method according to claim 1, it is characterized in that: described self-seal device of water drain plate, form by the seal that wraps up or be bonded in band drain top and the exhaust tube that draws water, the band drain bottom surface is opened wide, the band drain end face also be open wide but to be placed in the seal of self-seal device, seal around the top of band drain plate body, seal wraps up or is bonded in the top of band drain plate body.
3, self-seal vacuum pre-press reinforcing foundation technical method according to claim 2, it is characterized in that: the seal that wraps up or be bonded in band drain top is box-shaped tube seal height 50～500mm, wide 100～105mm, the exhaust tube that draws water of self-seal device is the quarter bend cornue, aperture 12～17mm.
4, self-seal vacuum pre-press reinforcing foundation technical method according to claim 1, it is characterized in that: band drain and self-seal device thereof are arranged according to matrix and are squeezed in the ground, connect the drainage connecting pipe system of bleeding, vacuum pump connects the main pipe of this system, main pipe connects parallel plurality of rows arm, connect a plurality of connecting branches in the both sides of arm, connecting branch connects the band drain sealing air exhaust cap of the exhaust tube that draws water of self-seal device of water drain plate again.
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| CNA2007100581584A CN101349054A (en) | 2007-07-16 | 2007-07-16 | Self-seal vacuum pre-press reinforcing foundation technical method |
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| CNA2007100581584A CN101349054A (en) | 2007-07-16 | 2007-07-16 | Self-seal vacuum pre-press reinforcing foundation technical method |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102140793A (en) * | 2011-03-15 | 2011-08-03 | 中交天津港湾工程研究院有限公司 | Filter pipe tread-in vacuum drainage super-soft soil reinforcing technical method |
| CN102373707A (en) * | 2011-07-27 | 2012-03-14 | 中交天津港湾工程研究院有限公司 | Method for rapidly driving plastic draining plate by electrifying (low-voltage direct current) |
| CN103074884A (en) * | 2013-01-11 | 2013-05-01 | 温州大学 | Deep decompression anatonosis type vacuum preloading foundation treatment method |
| CN103132503A (en) * | 2011-12-01 | 2013-06-05 | 上海市基础工程有限公司 | Membrane-through connecting device for vacuum pump and vacuum membrane drainage pipeline |
| CN103362115A (en) * | 2013-07-25 | 2013-10-23 | 水利部交通运输部国家能源局南京水利科学研究院 | Treating method and device for directly pumping up and in-vacuum draining foundation |
| CN103806437A (en) * | 2014-03-10 | 2014-05-21 | 王军 | Double-layer vacuum preloading and hydraulic reclamation soft foundation processing method |
| CN103924577A (en) * | 2014-04-08 | 2014-07-16 | 武汉二航路桥特种工程有限责任公司 | Monitoring pipe and vacuum film connecting structure and connecting construction method in soft foundation treatment |
| CN104264656A (en) * | 2014-09-26 | 2015-01-07 | 福建省建研勘察设计院 | Method of reinforcing soft soil foundations through downward drainage during vacuum preloading |
| CN104612129A (en) * | 2015-01-26 | 2015-05-13 | 刘春原 | Quick vacuum drainage device under high fill subgrade |
| CN104762982A (en) * | 2015-03-06 | 2015-07-08 | 中建三局第一建设工程有限责任公司 | Construction method of watery red sandstone geological underground water level control |
| CN104863115A (en) * | 2014-02-26 | 2015-08-26 | 天津市鑫瑞源建筑工程有限公司 | Water-ring vacuum pump prepressing and pressing method as well as prepressing and reinforcing device thereof |
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2007
- 2007-07-16 CN CNA2007100581584A patent/CN101349054A/en active Pending
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102140793A (en) * | 2011-03-15 | 2011-08-03 | 中交天津港湾工程研究院有限公司 | Filter pipe tread-in vacuum drainage super-soft soil reinforcing technical method |
| CN102140793B (en) * | 2011-03-15 | 2012-07-25 | 中交天津港湾工程研究院有限公司 | Filter pipe tread-in vacuum drainage super-soft soil reinforcing technical method |
| CN102373707A (en) * | 2011-07-27 | 2012-03-14 | 中交天津港湾工程研究院有限公司 | Method for rapidly driving plastic draining plate by electrifying (low-voltage direct current) |
| CN102373707B (en) * | 2011-07-27 | 2013-10-16 | 中交天津港湾工程研究院有限公司 | Method for rapidly driving plastic draining plate by electrifying |
| CN103132503A (en) * | 2011-12-01 | 2013-06-05 | 上海市基础工程有限公司 | Membrane-through connecting device for vacuum pump and vacuum membrane drainage pipeline |
| CN103132503B (en) * | 2011-12-01 | 2015-09-02 | 上海市基础工程集团有限公司 | For the membrane linkage of vacuum pump and vacuum diaphragm drainage pipe |
| CN103074884A (en) * | 2013-01-11 | 2013-05-01 | 温州大学 | Deep decompression anatonosis type vacuum preloading foundation treatment method |
| CN103362115A (en) * | 2013-07-25 | 2013-10-23 | 水利部交通运输部国家能源局南京水利科学研究院 | Treating method and device for directly pumping up and in-vacuum draining foundation |
| CN103362115B (en) * | 2013-07-25 | 2015-11-18 | 水利部交通运输部国家能源局南京水利科学研究院 | Direct aspiration vacuum draining foundation processing method and equipment thereof |
| CN104863115A (en) * | 2014-02-26 | 2015-08-26 | 天津市鑫瑞源建筑工程有限公司 | Water-ring vacuum pump prepressing and pressing method as well as prepressing and reinforcing device thereof |
| CN104863115B (en) * | 2014-02-26 | 2018-09-25 | 天津市鑫瑞源建筑工程有限公司 | A kind of water-ring vacuum pump precompressed pressure method |
| CN103806437A (en) * | 2014-03-10 | 2014-05-21 | 王军 | Double-layer vacuum preloading and hydraulic reclamation soft foundation processing method |
| CN103806437B (en) * | 2014-03-10 | 2017-01-18 | 温州大学 | Double-layer vacuum preloading and hydraulic reclamation soft foundation processing method |
| CN103924577A (en) * | 2014-04-08 | 2014-07-16 | 武汉二航路桥特种工程有限责任公司 | Monitoring pipe and vacuum film connecting structure and connecting construction method in soft foundation treatment |
| CN103924577B (en) * | 2014-04-08 | 2015-10-28 | 武汉二航路桥特种工程有限责任公司 | Monitoring pipe and vacuum diaphragm syndeton and connection construction method in a kind for the treatment of of soft foundation |
| CN104264656A (en) * | 2014-09-26 | 2015-01-07 | 福建省建研勘察设计院 | Method of reinforcing soft soil foundations through downward drainage during vacuum preloading |
| CN104612129A (en) * | 2015-01-26 | 2015-05-13 | 刘春原 | Quick vacuum drainage device under high fill subgrade |
| CN104762982A (en) * | 2015-03-06 | 2015-07-08 | 中建三局第一建设工程有限责任公司 | Construction method of watery red sandstone geological underground water level control |
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Open date: 20090121 |