CN104631475A - Safe and fast construction method of down-traversing river shallow depth bored tunnel - Google Patents

Safe and fast construction method of down-traversing river shallow depth bored tunnel Download PDF

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Publication number
CN104631475A
CN104631475A CN201510027958.4A CN201510027958A CN104631475A CN 104631475 A CN104631475 A CN 104631475A CN 201510027958 A CN201510027958 A CN 201510027958A CN 104631475 A CN104631475 A CN 104631475A
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CN
China
Prior art keywords
tunnel
river
construction
excavation
fast
Prior art date
Application number
CN201510027958.4A
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Chinese (zh)
Inventor
赵春华
王越辉
赵军
邓建林
卢春林
田精斐
陈昌连
Original Assignee
中铁隧道集团有限公司杭州公司
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Application filed by 中铁隧道集团有限公司杭州公司 filed Critical 中铁隧道集团有限公司杭州公司
Priority to CN201510027958.4A priority Critical patent/CN104631475A/en
Publication of CN104631475A publication Critical patent/CN104631475A/en

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Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D19/00Keeping dry foundation sites or other areas in the ground
    • E02D19/02Restraining of open water
    • E02D19/04Restraining of open water by coffer-dams, e.g. made of sheet piles
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00Independent underground or underwater structures; Retaining walls
    • E02D29/063Tunnels submerged into, or built in, open water
    • E02D29/077Tunnels at least partially built beneath the water-bed characterised by being made by methods involving disturbance thereof all along the location line, e.g. by cut-and-cover or caisson methods

Abstract

The invention discloses a safe and fast construction method of a down-traversing river shallow depth bored tunnel. The method includes the steps that on the two sides of the tunnel, the upstream and the downstream of a river are each provided with a clay cofferdam so that the river can be intercepted, and a dry river bed is formed in a tunnel construction area; the two constructed clay cofferdams are communicated through a flow guiding pipe, and therefore upstream river water and downstream river water can flow; the two sides of the tunnel are each provided with at least one row of Larsen steel plate piles, and the tunnel is excavated after the Larsen steel plate piles extend to a river bank in the axial direction of the tunnel. The clay cofferdams, the flow guiding pipe and the Larsen steel plate piles are matched coordinately and comprehensively utilized, and tunnel construction safety is guaranteed by the clay cofferdams, the flow guiding pipe and the Larsen steel plate piles jointly. The method is good in construction safety and high in construction efficiency, treatment measures are flexible, pertinent adjustment can be performed according to different geological conditions, and manufacturing cost of projects is saved as much as possible on the premise that safety is guaranteed.

Description

The construction method safely and fast of river shallow-depth-excavation tunnel is worn under a kind of
Technical field
The invention discloses a kind of under wear the construction method safely and fast of river shallow-depth-excavation tunnel, belong to technical field of tunnel construction.
Background technology
Along with the development of construction of tunnel, river is worn, in shallow-depth-excavation tunnel under needing in increasing tunnel, under wear the strategic point that river place is all generally engineering, if dealt with improperly, there will be large area infiltration phenomenon in the scope of operation and tunnel, even cause work plane unstability to cave in.How to ensure construction safety, improve efficiency of construction problems demand and solve.
Under wear river shallow-depth-excavation tunnel construction in, usually have two kinds of construction methods, first method does not change status of river, only by reinforcement hole in supporting carry out tunnel excavation; Second method adopts cutout or makes river diversion, then, carries out tunnel excavation.
For ensureing construction safety, first method usually adopts conservative construction method, reduces cyclic advance, the support system of coupling strengthening carries out tunnel excavation, and Enhanced support system adopts following measures usually: as used the advance support measure such as super-front large pipe shed, encryption advanced tubule, comprehensively section curtain-grouting, horizontal high pressure rotary churning pile or face pre-reinforcement; Adopt and strengthen steel arch-shelf model, reduce steel arch-shelf spacing, increase the preliminary bracing measures such as spray concrete thickness; For temporary lining, then expand temporary lining scope to greatest extent and improve temporary lining intensity etc., there is following defect in this construction method: 1. construction risk is comparatively large, once water burst occur or caves in, river can pour in down a chimney into tunnel, not only can have influence on down and wear river section, more likely floods whole piece tunnel, affects to bringing on a disaster property of constructing tunnel; 2. select conservative construction method, reduce cyclic advance, drag slow construction speed, strengthen time cost; 3. narrow space in hole, Enhanced support system constructing operation is inconvenient, affects construction organization, reduces efficiency of construction, and construction quality is difficult to ensure.
Second method is normally passed through near section in tunnel and river is drawn to other river courses; Or in tunnel pass through section upstream and downstream cofferdam be set block river; Or adopt after transit tunnel stops by Temporary Cofferdam temporarily, take to remove bed-silt, after laying the waterproof measures such as the outer grouting reinforcement in waterproofing materials, mortar flag stone and hole, remove Temporary Cofferdam, recovery river water flowing; Or adopt under wear the measure that stratum precipitation is carried out in two sides, river, stop the impact of river on constructing tunnel.But this method also exists following defect: 1. river diversion, may involve removal, pipeline moves, need the multidisciplinary coordinations such as government, disposal cost is higher, implements difficulty larger; 2. cutout is by seriously weakening controlling flood and draining flooded fields or the ability such as dirt removal of river course, brings adverse effect to neighbouring resident living, and can not stop upstream river in the horizontal direction along the impact of riverbed infiltration on tunnel construction site; 3. river bed process, river bed process before still need to do Temporary Cofferdam, river bed process after observability poor, go wrong can not Timeliness coverage, make up, once river bed treatment measures failure, can bring to constructing tunnel and have a strong impact on; 4. stratum precipitation, stratum precipitation easily causes stratum settlement, threatens the safety of Nearby Structure, and regular maintenance management etc. require higher, consume a large amount of material resources, manpower.
Prior art under wear in the shallow-depth-excavation tunnel construction in river, usually focus in hole more and take treatment measures, strengthening supporting in hole, even if take treatment measures outside hole, is also often only take a certain measure, the integrated treatment measure seldom outside consideration hole.
Summary of the invention
The object of the invention is to overcome the deficiency of prior art and provide that a kind of construction safety performance is good, efficiency of construction high under wear the construction method safely and fast of river shallow-depth-excavation tunnel.
Wear the construction method safely and fast of river shallow-depth-excavation tunnel under the present invention is a kind of, comprise the steps:
The first step: in both sides, tunnel, the upstream and downstream in river respectively applies a clay cofferdam and blocks river, forms dry riverbed in constructing tunnel region;
Second step: by two the clay cofferdam mozzle UNICOMs applied, realize the flowing of upstream and downstream river;
3rd step: respectively perform at least one row's Larsen steel sheet pile at tunnel two side position, the trend of described Larsen steel sheet pile extends to river levee along tunnel axis direction;
4th step: tunnel excavation.
Wear the construction method safely and fast of river shallow-depth-excavation tunnel under the present invention is a kind of, the cross section in described clay cofferdam is trapezoidal, and clay cofferdam absolute altitude is with riverbank absolute altitude.
Wear the construction method safely and fast of river shallow-depth-excavation tunnel under the present invention is a kind of, the upstream face in described clay cofferdam performs the concrete slab that thickness is 8 ~ 15 centimetres.
Wear the construction method safely and fast of river shallow-depth-excavation tunnel under the present invention is a kind of, draft-tube diameter is more than or equal to 80 centimetres.
Wear the construction method safely and fast of river shallow-depth-excavation tunnel under the present invention is a kind of, Larsen steel sheet pile is apart from tunnel edge distance 10-15 rice; The short transverse of Larsen steel sheet pile extends to place, bottom surface, tunnel plane.
Wear the construction method safely and fast of river shallow-depth-excavation tunnel under the present invention is a kind of, according to soil property situation and tunnel size, during tunnel excavation, select the one in CRD method, CD method, two side-wall pilot tunnel, single side heading method, benching tunnelling method and full section face method to carry out.
Advantage of the present invention:
1) clay cofferdam and river embankment form dry space, place, reduce river vertical under ooze, the Larsen steel plate in cofferdam prevents river course lower horizontal to infiltration, both coordinative roles, wear tunnel, river upper formation water content under minimizing, weaken the risk of tunnel construction;
2) arranging of mozzle can ensure that control flood and drain flooded fields normally in former river, the requirement of dirt removal, avoids because constructing tunnel brings impact to periphery ecological environment and resident living;
3) construction technology that involves of technical scheme disclosed by the invention is comparatively ripe, simple, and construction material, machinery etc., without particular/special requirement, easily apply in construction, are conducive to guarantee and apply quality, play its function;
4) technical scheme disclosed by the invention, find down the material risk source in the shallow-depth-excavation tunnel construction of wearing river in advance, and take measures to process targetedly, reduce the risk of constructing tunnel, be open to traffic lay good basis for tunnel safety, fast;
5) the heavy difficulties in advanced processing constructing tunnel process, is conducive to the optimization of construction organization, improves efficiency of construction.
Accompanying drawing explanation
Accompanying drawing is the constructure scheme schematic diagram of the embodiment of the present invention.
In figure: 1--shallow-depth-excavation tunnel, 2--Larsen steel sheet pile, 3-water conservancy diversion steel pipe, 4--clay cofferdam, 5--concrete slab;
Detailed description of the invention
Embodiment 1
Complete down for certain and worn river shallow-depth-excavation tunnel construction:
See accompanying drawing 1, shallow-depth-excavation tunnel 1 excavated section wearing river under this is 101 ㎡, belongs to Large span tunnel, and adopt CRD method excavation, tunnel top is about 9.3m far from river bed.Under wear the wide 25m in river, river bed absolute altitude-0.2m, riverbank absolute altitude 4.6m, the river course cross-section of river is standard rectangular section, dry season water level 0.5m, ordinary water level 1.67m.
1) in dry season, close upstream sluice, apply clay cofferdam 4, clay cofferdam 4 cross section is trapezoidal, clay cofferdam height 2.5 meters, clay cofferdam is formed up-narrow and down-wide, slope is than 1:2, and clay cofferdam Nei Shui apart from tunnel side wall 20m, and drains by cofferdam, form dry construction plant, and clay cofferdam upstream face builds 100mm steel concrete panel 5; Applying 6 road calibers is that the water conservancy diversion steel pipe 3 of Φ 1000 ensures that river is unimpeded, and water conservancy diversion steel pipe 3 connects into entirety by longitudinal dowel, and sequence of construction is for being from upstream to downstream, and the construction of single direction, forbids downstream absolute altitude higher than upstream absolute altitude; Reserved 1 ~ 2 water pumper is for subsequent use, gets rid of clay cofferdam internal water accumulation in time;
2) respectively perform row's Larsen steel sheet pile 2 at tunnel two side position, the trend of Larsen steel sheet pile 2 extends to river levee along tunnel axis direction; Larsen steel sheet pile is apart from tunnel edge distance 11 meters; Steel sheet pile is sling by mobile crane on the bank and is just being inserted, and then opens vibrating hammer vibration, one side inserted to play.For ensureing that steel sheet pile closes up smoothly, first leading truck should be laid.One can be inserted during beginning and make a call to one, get to design attitude by every a slice steel sheet pile, during to remaining last 20, first will inserting and beat afterwards, if close up wrong, making it to close up to drawing, after closing up, then by root inserted to play by jack or tackle pulley;
Larsen steel sheet pile inserted to play operation technique main points:
1. Larsen steel sheet pile is in place lower slotting, and first steel sheet pile is benchmark, repeated measurement inspection, and make its direction vertical, position is accurate, can add supporting facility if desired and come;
2. after being clamped by steel sheet pile, check the verticality of stake, position further, after accreditation, carry out inserted to play;
3. Larsen steel sheet pile closes up, and inserted to play, to when closing up face, accurately should measure size, considers the gap of steel sheet pile fore shaft and the performance of steel sheet pile itself, closes up face size and should be greater than theoretical size 15-20cm and be advisable.
3) tunneling of CRD method is adopted.
Adopt the inventive method, in digging process, there is not obviously seeping water phenomenon in tunnel, within 22 days, passes through smoothly.

Claims (6)

1. wear a construction method safely and fast for river shallow-depth-excavation tunnel under, comprise the steps:
The first step: in both sides, tunnel, the upstream and downstream in river respectively applies a clay cofferdam and blocks river, forms dry riverbed in constructing tunnel region;
Second step: by two the clay cofferdam mozzle UNICOMs applied, realize the flowing of upstream and downstream river;
3rd step: respectively perform at least one row's Larsen steel sheet pile at tunnel two side position, the trend of described Larsen steel sheet pile extends to river levee along tunnel axis direction;
4th step: tunnel excavation.
2. according to claim 1 a kind of under wear the construction method safely and fast of river shallow-depth-excavation tunnel, it is characterized in that: the cross section in described clay cofferdam is trapezoidal, and clay cofferdam absolute altitude is with riverbank absolute altitude.
3. according to claim 1 a kind of under wear the construction method safely and fast of river shallow-depth-excavation tunnel, it is characterized in that: the upstream face in described clay cofferdam performs the steel concrete panel that thickness is 8-15 centimetre.
4. according to claim 1 a kind of under wear the construction method safely and fast of river shallow-depth-excavation tunnel, it is characterized in that: draft-tube diameter is more than or equal to 80 centimetres.
5. according to claim 1 a kind of under wear the construction method safely and fast of river shallow-depth-excavation tunnel, it is characterized in that: Larsen steel sheet pile is apart from tunnel edge distance 10-15 rice; The short transverse of Larsen steel sheet pile extends to place, bottom surface, tunnel plane.
6. under a kind of according to claim 1-5 any one, wear the construction method safely and fast of river shallow-depth-excavation tunnel, it is characterized in that: according to geological condition and excavated section, during tunnel excavation, select the one in CRD method, CD method, two side-wall pilot tunnel, single side heading method, benching tunnelling method, full section method to carry out.
CN201510027958.4A 2015-01-20 2015-01-20 Safe and fast construction method of down-traversing river shallow depth bored tunnel CN104631475A (en)

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Cited By (12)

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Publication number Priority date Publication date Assignee Title
CN106640091A (en) * 2016-08-31 2017-05-10 广州市恒盛建设工程有限公司 Shallow-buried tunnel section construction method
CN106761779A (en) * 2017-01-24 2017-05-31 中铁二十局集团第六工程有限公司 A kind of shallow-depth-excavation tunnel passes through the construction method of box culvert
CN106930775A (en) * 2017-02-22 2017-07-07 宁波交通工程建设集团有限公司 The firm structure building enclosure of shallow embedding mountain highway tunnel gate-type campshed and its construction method
CN107542470A (en) * 2017-08-30 2018-01-05 中铁三局集团有限公司 Existing railway Business Line construction method is worn under the shallow tunnel of karst broken region
CN108194704A (en) * 2018-01-03 2018-06-22 杭州水利水电勘测设计院有限公司 One kind wears river technique
CN108755720A (en) * 2018-06-14 2018-11-06 中国十七冶集团有限公司 The relatively narrow river water method of river diversion for crossing water river is worn under large-scale synthesis piping lane
CN108797404A (en) * 2018-06-21 2018-11-13 中国十七冶集团有限公司 A kind of underground pipe gallery is across river section river water flow guiding structure and its construction method
CN108867693A (en) * 2018-07-18 2018-11-23 中铁十二局集团第二工程有限公司 The construction method of existing pipe gallery reinforcement protection
CN110043272A (en) * 2019-04-10 2019-07-23 中铁十二局集团有限公司 The method gushed in control shield machine tunneling process
CN110206062A (en) * 2019-06-11 2019-09-06 中国十七冶集团有限公司 The dark construction method of underground river shallow embedding is worn under a kind of Urban Underground pipe gallery
CN110454189A (en) * 2019-08-22 2019-11-15 中铁隧道集团三处有限公司 A kind of river tunnel Xia Chuan construction technology
CN110685704A (en) * 2019-10-15 2020-01-14 中铁十二局集团有限公司 Construction method for water bag pebble mixed soil layer earth pressure shield to pass through river channel

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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106640091A (en) * 2016-08-31 2017-05-10 广州市恒盛建设工程有限公司 Shallow-buried tunnel section construction method
CN106761779B (en) * 2017-01-24 2019-02-15 中铁二十局集团第六工程有限公司 A kind of shallow-depth-excavation tunnel passes through the construction method of box culvert
CN106761779A (en) * 2017-01-24 2017-05-31 中铁二十局集团第六工程有限公司 A kind of shallow-depth-excavation tunnel passes through the construction method of box culvert
CN106930775B (en) * 2017-02-22 2019-10-25 宁波交通工程建设集团有限公司 The rigid structure building enclosure of shallow embedding mountain highway tunnel gate-type campshed and its construction method
CN106930775A (en) * 2017-02-22 2017-07-07 宁波交通工程建设集团有限公司 The firm structure building enclosure of shallow embedding mountain highway tunnel gate-type campshed and its construction method
CN107542470B (en) * 2017-08-30 2019-09-24 中铁三局集团有限公司 Existing railway Business Line construction method is worn under the shallow tunnel of karst broken region
CN107542470A (en) * 2017-08-30 2018-01-05 中铁三局集团有限公司 Existing railway Business Line construction method is worn under the shallow tunnel of karst broken region
CN108194704A (en) * 2018-01-03 2018-06-22 杭州水利水电勘测设计院有限公司 One kind wears river technique
CN108755720A (en) * 2018-06-14 2018-11-06 中国十七冶集团有限公司 The relatively narrow river water method of river diversion for crossing water river is worn under large-scale synthesis piping lane
CN108797404A (en) * 2018-06-21 2018-11-13 中国十七冶集团有限公司 A kind of underground pipe gallery is across river section river water flow guiding structure and its construction method
CN108867693A (en) * 2018-07-18 2018-11-23 中铁十二局集团第二工程有限公司 The construction method of existing pipe gallery reinforcement protection
CN110043272A (en) * 2019-04-10 2019-07-23 中铁十二局集团有限公司 The method gushed in control shield machine tunneling process
CN110206062A (en) * 2019-06-11 2019-09-06 中国十七冶集团有限公司 The dark construction method of underground river shallow embedding is worn under a kind of Urban Underground pipe gallery
CN110454189A (en) * 2019-08-22 2019-11-15 中铁隧道集团三处有限公司 A kind of river tunnel Xia Chuan construction technology
CN110685704A (en) * 2019-10-15 2020-01-14 中铁十二局集团有限公司 Construction method for water bag pebble mixed soil layer earth pressure shield to pass through river channel

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Application publication date: 20150520