CN101737057A - Method for constructing subway station air shaft for soft soil strata - Google Patents

Method for constructing subway station air shaft for soft soil strata Download PDF

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Publication number
CN101737057A
CN101737057A CN200810202519A CN200810202519A CN101737057A CN 101737057 A CN101737057 A CN 101737057A CN 200810202519 A CN200810202519 A CN 200810202519A CN 200810202519 A CN200810202519 A CN 200810202519A CN 101737057 A CN101737057 A CN 101737057A
Authority
CN
China
Prior art keywords
box culvert
horizontal
horizontal box
shaft
construction
Prior art date
Application number
CN200810202519A
Other languages
Chinese (zh)
Inventor
方兆昌
顾源兴
李淑海
张志勇
王元满
王中兵
Original Assignee
上海广联建设发展有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 上海广联建设发展有限公司 filed Critical 上海广联建设发展有限公司
Priority to CN200810202519A priority Critical patent/CN101737057A/en
Publication of CN101737057A publication Critical patent/CN101737057A/en

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Abstract

The invention discloses a method for constructing a subway station air shaft for soft soil strata, relates to the technical field of underground construction, and aims to solve the technical problems of low construction indirect cost and safe construction without digging the soft soil strata, closing traffic or moving pipelines. The method comprises the following steps: 1) drilling a shaft; 2) casting the shaft wall; 3) filling the outside of the wall; 4) laying reinforcement bars for counter pulling horizontal box culvert; 5) carrying out box culvert horizontal counter pulling construction, namely embedding a plurality of vertical risers for draining on an engineering axial line, counter pulling the horizontal box culvert by using a horizontal counter pulling device, and precipitating by using the riser closest to the forward horizontal box culvert, and removing the riser when the horizontal box culvert is contacted with the riser; and 6) continuing to performing counter pulling on the horizontal box culvert, and repeating the step 5) in cycles until the horizontal box culvert is successfully counter pulled. The method has the characteristics of low construction indirect cost and safe construction without digging, closing traffic or moving the pipelines.

Description

The job practices that is used for the subway station air shaft of soft soil layer
Technical field
The present invention relates to the underground construction technology, particularly relate to a kind of underground tunneling construction technology that is applicable to the subway station air shaft of the soft soil layer that groundwater table is high.
Background technology
The general about 18m of subway station air draft well cross-sectional area 2, downcast cross-sectional area 12~13m 2, according to the degree of depth of subway station, the about 15~16m of the degree of depth of below ground well advances, the air draft well all links to each other with the subway station by horizontal channel (distance of horizontal channel generally is not more than 25m, concrete distance decide on the subway station surrounding enviroment).Construction generally is to adopt cut and cover tunneling to this type of subway station air shaft at present, and promptly the underground horizontal channel that is connected with the subway station of ventilating shaft, ventilating shaft all adopts the mode of excavating the top soil body to construct.This form of construction work exists following shortcoming:
1) needs to move municipal pipeline before the excavation, need the department of cooperation many, link is many, has a strong impact on construction speed; Resettlement municipal pipeline input is many, causes the wasting of resources.
2) need road closure before the excavation, influence traffic and resident trip.
3) need to carry out measure constructions such as bracing of foundation pit, well-points dewatering before the excavation, not only increase cost, and underground space is polluted, and later underground space development is exerted an influence.
4) excavation is bigger to the urban environmental impact.
For the high soft clay area of groundwater table, how under water environment, to guarantee the then not consideration of underground tunneling construction safety in addition.
Summary of the invention
At the defective that exists in the above-mentioned prior art, technical problem to be solved by this invention provides a kind of need not the excavation, need not close a road to traffic, needn't move pipeline, the construction indirect cost is low, the job practices of the subway station air shaft that is used for the high soft soil layer of groundwater table of construction safety.
In order to solve the problems of the technologies described above, a kind of job practices that is used for the subway station air shaft of soft soil layer provided by the present invention is characterized in that, job practices adopts following steps:
1) bore vertical shaft: the employing wellbore construction advances, exhaust air shaft;
2) cast the borehole wall: advance the exhaust air shaft borehole wall and adopt aperture cast-in-place " sliding formwork method " to make, the interface of the borehole wall and horizontal channel is reserved the hole, reserves and establishes the grid type support in the hole, and reserve connector;
3) the outer filling of wall: annular gap backfill stone between the borehole wall and the soil body, and the pressure injection cement grout solidifies;
4) lay (drag-line) bar reinforcement to drawing horizontal box culvert to use: utilize the horizontal directional drill construction technology to lay drawing bar reinforcement with ventilating shaft vertical shaft and space, subway station as active well earlier,
5) the box culvert level is to drawing construction: manage along burying a plurality of vertical well points that are used for draining on the engineering axis of horizontal box culvert underground between ventilating shaft vertical shaft and subway station, utilize then comprise rod iron group and rod iron self-locking device, jack group, head level to drawing device to drawing horizontal box culvert, and utilize from the nearest well point pipe precipitation of the horizontal box culvert of reach, when treating that horizontal box culvert is run into the well point pipe, then pull out this root well point pipe;
6) continue drawing horizontal box culvert, repeating step 5 again and again), promptly manage drawing (reach) horizontal box culvert---to manage precipitation---to pull out (horizontal box culvert is run into) well point with the well point, until horizontal box culvert to pulling into merit;
7) horizontal channel is connected processing with the vertical shaft junction.
Utilize the job practices that is used for the subway station air shaft of soft soil layer provided by the invention, its beneficial effect is: construction area need not excavate, need not close a road to traffic, needn't move pipeline, the construction indirect cost is low, little to the surrounding enviroment influence, substantially do not influence resident trip, can shorten the subway station construction period; Since adopt well point pipe precipitation to pulling construction method, guaranteed that underground horizontal box culvert in the high soft clay area of groundwater table, can be at the underground safe construction of soft clay area thereby realized to drawing the safety of construction.
Description of drawings
Fig. 1 is embodiment of the invention construction structure sectional drawing;
Fig. 2 is the technology floor map of embodiment of the invention ventilating shaft vertical shaft wellbore construction;
Fig. 3 is the technology floor map of embodiment of the invention ventilating shaft horizontal channel box culvert to drawing;
Fig. 4 is the schematic diagram of level in the embodiment of the invention construction to drawing device.
The specific embodiment
Below in conjunction with description of drawings embodiments of the invention are described in further detail, but present embodiment is not limited to the present invention, every employing similarity method of the present invention and similar variation thereof all should be listed protection scope of the present invention in.
By Fig. 1-shown in Figure 4, a kind of job practices that is used for the subway station air shaft of soft soil layer that the embodiment of the invention provided is characterized in, concrete implementation step:
1) creeps into
Utilize " boring method " row of creeping into, air-intake shaft 1, to get into the end, air-intake shaft internal diameter 4m wherein, exhaust air shaft internal diameter 5m, drilling depth surpasses horizontal box culvert 5 baseplane certain distances, employing premium mud retaining wall in the drilling process.
2) borehole wall is made
Creep into finish after, adopt " sliding formwork method " at the cast-in-place borehole wall 2 of well head.
3) the outer filling of wall
After the borehole wall 2 is transferred and is put in place, backfill stone and cement grout 3 in the borehole wall 2 and soil body gap, the borehole wall 2 is fixing.
4) horizontal channel box culvert (drag-line) bar reinforcement is laid
Utilize horizontal directional drilling machine along the bar reinforcement of axis direction laying in horizontal channel to drawing horizontal box culvert to use, earlier that rig is in place, the pilot hole of constructing then, the length of starter when promptly basis is crept into, on position, bar reinforcement hole, manually dig hole in advance, construction guidance hole next, the expansion of holing back, be that sleeve pipe returns and drags at last, sleeve pipe is the passage lanes of bar reinforcement 8.
5) box culvert level in horizontal channel is to drawing
Manage 9 along burying a plurality of vertical well points that are used for draining on the engineering axis of horizontal box culvert underground between ventilating shaft vertical shaft and subway station, both sides box culvert 5 is transferred in the subway station 6 and the vertical shaft 1 of having constructed respectively and is put in place, utilize level that drawing device (is comprised the jack group then, head, with corresponding bar reinforcement group of jack group and bar reinforcement self-locking device) 7 uninterruptedly at the uniform velocity (promptly to utilize and carve the self-lock mechanism of arranging before and after the type moveable anchor group to drawing, the reciprocating motion of jack is become the one-way movement of bar reinforcement, make two heads counterforce device each other, march forward mutually) horizontal box culvert 5, wherein intake horizon passage box culvert cross dimensions is 4m (wide) * 3m (height), and air draft horizontal channel box culvert cross dimensions is 5m (wide) * 4m (height); Utilize the space of subway station 6 and vertical shaft 1 to be unearthed, and utilize from the nearest well point of horizontal box culvert of reach and manage 9 precipitation, when treating that horizontal box culvert is run into the well point pipe, then pull out this root well point pipe;
6) continue drawing horizontal box culvert, repeating step 5 again and again), promptly---managing 9 precipitation with the well point---pulls out (horizontal box culvert is run into) well point pipe to drawing (reach) horizontal box culvert, to pulling into merit, finishes the construction of horizontal channel 4 until horizontal box culvert.
7) box culvert is connected processing with vertical shaft
After two sections 5 pairs of box culverts pull, the vertical shaft borehole wall 2 and horizontal box culvert 5 usefulness connectors are connected fluid concrete.

Claims (1)

1. a job practices that is used for the subway station air shaft of soft soil layer is characterized in that, job practices adopts following steps:
1) bore vertical shaft: the employing wellbore construction advances, exhaust air shaft;
2) cast the borehole wall: advance the exhaust air shaft borehole wall and adopt aperture cast-in-place " sliding formwork method " to make, the interface of the borehole wall and horizontal channel is reserved the hole, reserves and establishes the grid type support in the hole, and reserve connector;
3) the outer filling of wall: annular gap backfill stone between the borehole wall and the soil body, and the pressure injection cement grout solidifies;
4) bar reinforcement of laying to drawing horizontal box culvert to use: utilize the horizontal directional drill construction technology to lay with ventilating shaft vertical shaft and space, subway station as active well earlier to drawing bar reinforcement;
5) the box culvert level is to drawing construction: manage along burying a plurality of vertical well points that are used for draining on the engineering axis of horizontal box culvert underground between ventilating shaft vertical shaft and subway station, utilize then comprise rod iron group and rod iron self-locking device, jack group, head level to drawing device to drawing horizontal box culvert, and utilize from the nearest well point pipe precipitation of the horizontal box culvert of reach, when treating that horizontal box culvert is run into the well point pipe, then pull out this root well point pipe;
6) continue drawing horizontal box culvert, repeating step 5 again and again), promptly---managing precipitation with the well point---pulls out the well point pipe to drawing horizontal box culvert, until horizontal box culvert to pulling into merit;
7) horizontal channel is connected processing with the vertical shaft junction.
CN200810202519A 2008-11-11 2008-11-11 Method for constructing subway station air shaft for soft soil strata CN101737057A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN200810202519A CN101737057A (en) 2008-11-11 2008-11-11 Method for constructing subway station air shaft for soft soil strata

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN200810202519A CN101737057A (en) 2008-11-11 2008-11-11 Method for constructing subway station air shaft for soft soil strata

Publications (1)

Publication Number Publication Date
CN101737057A true CN101737057A (en) 2010-06-16

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102425423A (en) * 2011-12-31 2012-04-25 上海市机械施工有限公司 Constructing method for shield entering into hole while passing through pipeline
CN106544964A (en) * 2016-11-08 2017-03-29 中铁六局集团天津铁路建设有限公司 Road bed and lowering water level construction method during jacking box culvert
CN110985026A (en) * 2019-12-23 2020-04-10 中建五局土木工程有限公司 Shield station-crossing construction method for layered backfilling in narrow shaft

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102425423A (en) * 2011-12-31 2012-04-25 上海市机械施工有限公司 Constructing method for shield entering into hole while passing through pipeline
CN102425423B (en) * 2011-12-31 2014-08-06 上海市机械施工集团有限公司 Constructing method for shield entering into hole while passing through pipeline
CN106544964A (en) * 2016-11-08 2017-03-29 中铁六局集团天津铁路建设有限公司 Road bed and lowering water level construction method during jacking box culvert
CN110985026A (en) * 2019-12-23 2020-04-10 中建五局土木工程有限公司 Shield station-crossing construction method for layered backfilling in narrow shaft

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WD01 Invention patent application deemed withdrawn after publication

Open date: 20100616

C02 Deemed withdrawal of patent application after publication (patent law 2001)