CN102168563B - Static pressure jack-in method of pipe sheds or small ducts - Google Patents

Static pressure jack-in method of pipe sheds or small ducts Download PDF

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Publication number
CN102168563B
CN102168563B CN 201110065737 CN201110065737A CN102168563B CN 102168563 B CN102168563 B CN 102168563B CN 201110065737 CN201110065737 CN 201110065737 CN 201110065737 A CN201110065737 A CN 201110065737A CN 102168563 B CN102168563 B CN 102168563B
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CN
China
Prior art keywords
soil
steel pipe
static pressure
unit
pipe unit
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CN 201110065737
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Chinese (zh)
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CN102168563A (en
Inventor
石景山
周顺华
王炳龙
贾剑
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同济大学
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Priority to CN 201110065737 priority Critical patent/CN102168563B/en
Publication of CN102168563A publication Critical patent/CN102168563A/en
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Publication of CN102168563B publication Critical patent/CN102168563B/en

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Abstract

The invention relates to a static pressure jack-in method of pipe sheds or small ducts. Aimed at the problems of difficult hole firming and large sedimentation in the construction of pipe sheds and small ducts in soft soil layers, the static pressure jack-in method for pipe shed or small duct construction is invented on the basis of Newton's third law and soil mechanical principles; a steel tube is used for squeezing soils to form a hole so as to achieve the aims of compacting and water draining; the jack-in force of the steel tube is static pressure; compared with other methods, the method can reduce soil disturbance. The method provided by the invention is realized by a static force supply device, a soil external steel tube guide device, and a soil internal pipe shed and small duct orienting device. The static force supply device applies static pressure to a pipe shed or small duct unit to be jacked at a certain angle; a steel tube is jacked into the soil by the static force; a steel tube to be arranged at the outer side of the excavation face is acted by a static force guide device; after being jacked into surrounding rocks, the steel tube is jacked in at a certain angle under the action of the pipe shed and small duct orienting device; after the jack-in operation of the former unit is completed, the jack-in operation of next steel tube unit is performed circularly. The method related by the invention can compact and consolidate soil, drain water and reduce construction disturbance, thereby strengthening the pre-support effect of the pipe sheds or small ducts.

Description

Pipe canopy or ductule static pressure head into method

Technical field

The present invention relates to the tunnel and pay the job practices of the measure of protecting in advance, be specifically related to a kind of pipe canopy or ductule static pressure and head into method.

Background technology

In the shallow burial hidden digging construction, for the relatively poor country rock of self-stable ability, the measure of protecting is paid in normal employing in advance, to reach the purpose of reinforcing country rock, steady operation face.The measure of often adopting of protecting of paying in advance comprises advance pipe shed pre-support and grouting with small pipe reinforcing.Pipe shed method is through squeezing into steel pipe and slip casting in intending the excavation soil layer, to improve the soil layer self-stable ability, Stabilized Soil arch and minimizing excavation cause the stratum loss; Simultaneously, steel pipe and grid form steel pipe frame system, can transmit the distortion of load, control country rock.Pre-timbering with tubular prop and ductule are paid the measure of protecting in advance and are contained grouting and reinforcing usually, and grouting and reinforcing can change the loose structure of country rock, improve adhesion stress and angle of internal friction, and the sealing crack significantly improves country rock intensity.Grouting with small pipe is reinforced general fit tube canopy advance support and is used, and has advantages such as cost is low, construction is convenient, is widely used in the shallow embedding engineering.

The pipe canopy is executed and is made the laggard pipe method of general employing elder generation's boring, guide pipe advances method, returns methods such as dragging method with pipe bit.------steel pipe---is installed---in clear hole, and slip casting, this method are applicable in the general rock-soil layer that country rock is than under the stable case to the job practices of the laggard pipe of boring in rig boring for construction cover arch earlier.Guide pipe advances the method job practices with pipe bit and is------steel pipe jacking------steel pipe jacking---circulation---slip casting that rig creeps into that rig creeps into of construction cover arch; Advance process with pipe bit and cooperate the drill bit correction; To satisfy required precision, this method is applicable to that long distance sets the pipe canopy.Returning the method for the dragging horizontally-guided of constructing at one end creeps into and forms pilot hole and return from the other end then and drag steel pipe; Carry out the slip casting sealing at last; This method generally is used for the overlength pipe roof construction one time; It is isometric apart from engineering to be applied to the station, and repeatedly canopy is managed in construction in growing apart from tunnel excavation, short distance cavern excavation cost is higher.

At present, a large amount of shallow embedding engineerings are in the soft soil layer, and soil layer construction property is poor, soil body water content high.Adopt conventional boring installation steel pipe method pipe canopy pore-forming difficulty and easy dehydration to cause sedimentation bigger, be difficult for adopting.Return the pipe canopy that drags method to be suitable for certain distance and execute work, but can only reduce part Guan Peng service depot for short-range engineerings such as terrain running tunnel of crossing street passage and long distance, economic benefit is not obvious.Guide pipe advances the method number of times requirement of in the weak soil layer, rectify a deviation with pipe bit to be increased, equipment and complicated operation, cost is high, the weak soil layer long and short apart from pipe roof construction in use less.The ductule less employing of constructing is returned and is dragged method and advance method with pipe bit, being mainly boring steel pipe is installed, and in the weak soil layer, is prone to cause bigger pore-forming sedimentation.

Summary of the invention

The present invention is according to the weak point of aforementioned tube canopy and ductule construction technology in the weak soil layer; Propose a kind of pipe canopy or ductule static pressure and head into method; Mainly head into steel pipe through static(al) and reach the compacted soil body, local purpose such as fixed, the equipment of heading into can be placed in the tunnel excavation section, practices thrift space, Guan Peng service depot; The static(al) generator plays good consolidation effect through the construction precision of external orientation device and inner orientation device control valve canopy or ductule.

Pipe canopy or ductule static pressure that the present invention proposes head into method; Realize that by static pressure generator 5, soil body external orientation device 4 and inside soil body bearing unit 3 steel pipe heads into construction; Be evenly distributed with injected hole 2 on steel pipe 1 pipe shaft; Steel pipe 1 sets steel pipe unit 15 by the steel pipe unit 12 that is positioned at the top, the entering inside soil body steel pipe unit 13 that is positioned at the middle part, the insertion soil body steel pipe unit 14 that is positioned at afterbody and soil body outside plan and connects to form successively; Steel pipe unit 12, get into inside soil body steel pipe unit 13, insert soil body steel pipe unit 14 and the soil body outside and intend and setting between the steel pipe unit 15 through being threaded, steel pipe 1 is squeezed in the tunnel excavation vault line 7 top certain limits; 12 tops, steel pipe unit are processed into taper; Insertion soil body steel pipe unit 14 receives the effect of inside soil body bearing unit 3; Inside soil body bearing unit 3 inserts the single steel pipe length of soil body 0.4-1.0; Soil body outside plan sets steel pipe unit 15 and receives 4 effects of soil body external orientation device, and soil body outside plan sets steel pipe unit 15 afterbodys and connects static pressure linkage 5, and static pressure linkage 5 other ends contact with static pressure generator 6; Concrete steps are following: static pressure generator 6 transmits static pressure to static pressure linkage 5 with pipe canopy or ductule design angle; Static pressure linkage 5 transmits static pressure and squeezes into steel pipe unit 15 to intending under the effect of soil body external orientation device 4; Transmission through power between each unit of steel pipe 1 squeezes into into the soil body; Inserting soil body steel pipe unit 14 receives the effect of inside soil body bearing unit 3 to get into the soil body; Intend setting steel pipe unit 15 and become afterbody and partly insert soil body steel pipe unit 14 until the soil body outside, former insertion soil body steel pipe unit 14 becomes the middle part and gets into inside soil body steel pipe unit 13 simultaneously, and then connects next steel pipe unit of construction.

Among the present invention, said steel pipe 1 is pipe canopy or ductule.

Above-mentioned steel pipe unit is heading into design angle in the soil body process; Afterbody partly inserts soil body steel pipe unit 14 and receives 3 effects of inside soil body bearing unit, and soil body outside plan sets steel pipe unit 15 and is connected the effect that receives the outer lateral guide 4 of the soil body with the static pressure linkage.

Among the present invention, inside soil body bearing unit 3 is generally the cover arch, and inserting the soil body degree of depth is 0.4-1.0 individual tubes canopy length doubly.

Advantage of the present invention is, static pressure heads into the compacted discharging consolidation of steel pipe, the method that heads into is simple, it is easy to control with the convenient construction precision that is prone to construction, pipe canopy and ductule of guiding device to head into, head into that the process soil disturbance is few, sedimentation is little.To sum up, this method can the reinforced pipe canopy or grouting with small pipe pay in advance and protect effect, practice thrift cost simultaneously.

To manage ceiling and go into to be regarded as at the uniform velocity process, the static pressure and the surrounding soil that receive counterforce device according to the stress balance steel pipe provide resistance balance to pipe canopy or ductule.Receive the squeezing action interior soil body volume compression of certain limit on every side of steel pipe; Produce consolidation effect; Volume compression simultaneously causes the ultra interstitial hydraulic pressure of inside soil body, and the space that the draining osmosis of the injected hole on pipe canopy or the ductule and steel pipe and surrounding soil exist provides seepage channel preferably.Therefore, produce discharging consolidation near the steel pipe soil body, excess pore water pressure dissipates, and reinforces country rock.

Description of drawings

Fig. 1 heads into the method structural representation for static pressure.

Fig. 2 heads into compacted draining sketch map for managing canopy or ductule static pressure.

Label among the figure: 1 is steel pipe, and 2 is injected hole, and 3 are pipe canopy or ductule inside soil body bearing unit; 4 are pipe canopy or ductule unit soil body external orientation device, and 5 is the static pressure linkage, and 6 is the static pressure generator; 7 is tunnel excavation face vault line, and 8 is the tunnel excavation face, and 9 steel pipes squeeze soil pressure; 10 for static pressure heads into soil body discharge line, and 11 influence line for static pressure heads into the compacted soil body, and 12 is the steel pipe unit; 13 are entering inside soil body steel pipe unit, and 14 for inserting soil body steel pipe unit, and 15 is that soil body outside plan sets the steel pipe unit.

The specific embodiment

Characteristic of the present invention and relevant feature are explained further details through practical implementation below in conjunction with accompanying drawing, so that the same industry is studied, the technician understands:

Label 1-15 representative is that pipe canopy or ductule steel pipe 1, injected hole 2, pipe canopy or ductule inside soil body bearing unit 3, pipe canopy or ductule unit soil body external orientation device 4, static pressure linkage 5, static pressure generator 6, tunnel excavation face vault line 7, tunnel excavation face 8, steel pipe squeeze that soil pressure 9, static pressure head into soil body discharge line 10, static pressure heads into the compacted soil body influence line 11 among the accompanying drawing 1-2, and steel pipe 1 is got into by steel pipe unit, top 12, middle part that inside soil body steel pipe unit 13, afterbody partly insert soil body steel pipe unit 14, soil body outside plan sets steel pipe unit 15 and forms.

Accompanying drawing 1 is the implementation structure sketch map of invention, i.e. longitudinal plan.Can know that by Fig. 1 this method power is to be provided by static pressure generators 6 such as jack, be delivered on pipe canopy or the ductule via static pressure linkage 5.These static pressure linkage 5 main static pressure transmission and soil body outside plans of realizing set the fixing of steel pipe unit 15.Soil body external orientation device 4 is positioned to intend and sets steel pipe unit 15 and static pressure linkage 5 belows, and main realization control is intended and set the direction that steel pipe unit 15 static pressures are transmitted.Along with the jacking that sets steel pipe unit 15 is intended in the soil body outside, insertion soil body steel pipe unit 14 receives the effect entering soil body of inside soil body bearing unit 3 to become the middle part and gets into inside soil body steel pipe unit 13, executes then and makes next steel pipe unit.

Fig. 2 is the A-A sectional drawing of Fig. 1, perpendicular to pipe canopy or ductule cross section the static pressure effect is arranged.Visible from Fig. 2, steel pipe 1 is squeezed into country rock under the static pressure effect, and heading into the compacted soil body according to static pressure influences line 11, sees the compression interior soil body of scope on every side, plays compacted effect.Simultaneously, steel pipe 1 contacts with the light face of country rock and the injected hole 2 of steel pipe itself can provide penetrating passage, heads into the pore water in the soil body discharge line 10 through static pressure, reaches the effect of discharging consolidation.

In addition, steel pipe heads into and can cause the steel pipe surrounding soil to produce excess pore water pressure under the load action, is beneficial to pore water and discharges from passages such as injected hole, contact surfaces.

The non-excavation of this invention realization is executed and is made pipe canopy or ductule, and the soil body has been produced consolidation effect compacted, draining.The implement device of this invention is simple in structure; Easy to operate, required construction space is less, can cancel the service depot; Pay in advance to protect for long and short distance pipe canopy or ductule and execute work; Can repeatedly execute in the cavern at excavation and make pipe canopy or ductule, the length that pipe canopy of the present invention or ductule are once executed work should be controlled in the 15m-20m scope, once executes and does longly will cause executing that to make precision wayward.

This invention is to paying the construction of protecting steel pipe in advance in the weak soil layer, especially for clay, the silt of high-moisture.In the weak soil layer, self is poor, conventional pipe canopy pore-forming difficulty, and be prone to cause excessive sedimentation.Adopt the static pressure process that heads into to reduce the country rock disturbance, have the extrusion drainage effect concurrently.The present invention is applicable to the weak soil layer, heads into process and phenomenons such as country rock crack, protuberance can not occur.

Claims (1)

1. pipe canopy or ductule static pressure head into method; It is characterized in that realizing that by static pressure generator (6), soil body external orientation device (4) and inside soil body bearing unit (3) pipe canopy or ductule head into construction; Be evenly distributed with injected hole (2) on steel pipe (1) pipe shaft; Steel pipe (1) sets steel pipe unit (15) by the steel pipe unit (12) that is positioned at the top, the entering inside soil body steel pipe unit (13) that is positioned at the middle part, the insertion soil body steel pipe unit (14) that is positioned at afterbody and soil body outside plan and connects to form successively; Steel pipe unit (12), get into inside soil body steel pipe unit (13), insert soil body steel pipe unit (14) and the soil body outside and intend and setting between the steel pipe unit (15) through being threaded, steel pipe (1) is squeezed into above the tunnel excavation vault line (7) in the certain limit; Top, steel pipe unit (12) is processed into taper; Insert soil body steel pipe unit (14) and receive the effect of inside soil body bearing unit (3); Inside soil body bearing unit (3) inserts the single steel pipe length of soil body 0.4-1.0; Soil body outside plan sets steel pipe unit (15) and receives soil body external orientation device (4) effect, and soil body outside plan sets steel pipe unit (15) afterbody and connects static pressure linkage (5), and static pressure linkage (5) other end contacts with static pressure generator (6); Concrete steps are following: static pressure generator (6) transmits static pressure to static pressure linkage (5) with steel pipe (1) design angle; Static pressure linkage (5) transmits static pressure and squeezes into steel pipe unit (15) to intending under the effect of soil body external orientation device (4); Transmission through power between each unit of steel pipe (1) squeezes into into the soil body; Inserting soil body steel pipe unit (14) receives the effect of inside soil body bearing unit (3) to get into the soil body; Intend until the soil body outside and to set steel pipe unit (15) and become afterbody and partly insert soil body steel pipe unit (14); Former insertion soil body steel pipe unit (14) become entering inside soil body steel pipe unit (13), middle part simultaneously, and then connect next steel pipe unit of construction; Wherein: said steel pipe (1) is pipe canopy or ductule.
CN 201110065737 2011-03-18 2011-03-18 Static pressure jack-in method of pipe sheds or small ducts CN102168563B (en)

Priority Applications (1)

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Application Number Priority Date Filing Date Title
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CN102168563B true CN102168563B (en) 2012-12-05

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Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102758639B (en) * 2012-04-10 2014-12-10 中铁隧道集团三处有限公司 Anti-blowout long tube grouting method for limited-space tunnels
CN102619537B (en) * 2012-04-23 2014-06-18 山东大学 Wing plate type advanced small pipe used for advance support of soft broken surrounding rock tunnel
CN103422868B (en) * 2013-08-06 2015-10-21 同济大学 The structure of a kind of Super-void Water Pressure that dissipates, reinforcing shield tunnel soil body and method
CN104790971B (en) * 2015-04-03 2017-06-23 核工业井巷建设集团公司 A kind of advanced pre-add solid method of steel tube shed of the small spacing ground constructing tunnel of shallow embedding
CN105736018B (en) * 2016-01-28 2018-06-19 上海隧道工程有限公司 For the forced pipe shed support structure in soft stratum tunnel
CN107060805B (en) * 2017-03-23 2019-08-16 中交三航局第三工程有限公司 A kind of deviation correcting device of advanced levels pipe curtain jacking construction

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Application publication date: 20110831

Assignee: China thirteen Railway Construction Bureau Group Co. Ltd.

Assignor: Tongji University

Contract record no.: 2014310000074

Denomination of invention: Static pressure jack-in method of pipe sheds or small ducts

Granted publication date: 20121205

License type: Common License

Record date: 20140422

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