CN109184703B - Arrangement method of overlapped pipe-jacking deep and large working well manufactured after structure - Google Patents

Arrangement method of overlapped pipe-jacking deep and large working well manufactured after structure Download PDF

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Publication number
CN109184703B
CN109184703B CN201811122393.8A CN201811122393A CN109184703B CN 109184703 B CN109184703 B CN 109184703B CN 201811122393 A CN201811122393 A CN 201811122393A CN 109184703 B CN109184703 B CN 109184703B
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China
Prior art keywords
jacking
pipe
construction
working well
floor
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CN201811122393.8A
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CN109184703A (en
Inventor
黄爱军
王春凯
张向霞
张海波
吕培林
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Shanghai Urban Construction Design Research Institute Group Co Ltd
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Shanghai Urban Construction Design Research Institute Group Co Ltd
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Publication of CN109184703A publication Critical patent/CN109184703A/en
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    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/14Layout of tunnels or galleries; Constructional features of tunnels or galleries, not otherwise provided for, e.g. portals, day-light attenuation at tunnel openings

Abstract

The invention discloses a method for arranging a large working well with deep overlapped jacking pipes after construction; the method comprises the following steps: firstly, determining the plane size of a pipe jacking working well; determining the layer height; determining the bottom elevation of the working well; secondly, in the implementation stage of the working well, a temporary space stress conversion system is adopted at the construction side of the jacking pipe; constructing the non-pipe-jacking construction side according to the building use requirements; thirdly, in the construction stage of pipe jacking, hoisting pipe joints, slag, equipment and materials by depending on the space reserved by post-cast floor slabs of each layer in the working well; constructing a bottom jacking pipe, and after the bottom jacking pipe is constructed, erecting a construction platform to construct a top jacking pipe; finally, after the construction of the jacking pipe is finished, according to the arrangement requirements of the floor slabs in the using stage, the floor slabs are cast in situ to seal holes, and redundant temporary structures are chiseled; finishing the interior decoration and equipment installation of the working well. The invention solves the contradiction between the floor height of the working well and the construction requirement of the jacking pipe, and avoids unnecessary floor heightening or floor number increasing.

Description

Arrangement method of overlapped pipe-jacking deep and large working well manufactured after structure
Technical Field
The invention relates to the technical field of underground working well construction, in particular to a method for arranging a large working well with overlapped pipe jacking depth after a structure is manufactured.
Background
With the development of pipe jacking technology, the adaptability of the pipe jacking to underground engineering is stronger and stronger. Accordingly, as underground spaces are developed, the limiting factor of the surrounding environment for underground works is increasing.
In the prior art, many complex underground tunnels are also increasingly constructed using jacking pipes, wherein typically a plurality of jacking pipes are arranged in an overlapping manner. How to safely, reasonably and optimally set the pipe-jacking working well is the foundation for pipe jacking implementation.
A conventional pipe-jacking working well firstly constructs a working well enclosure structure and an internal structure, and a pipe-jacking hoisting hole is reserved in a structural slab and is used for hoisting equipment, pipe joints and slag. And after the construction of the jacking pipe is finished, carrying out structural sealing and earthing and backfilling.
But for the overlapped jacking pipes, the process requirements of the jacking pipes determine that the vertical spacing of the jacking pipes needs to meet the requirement of a certain clear distance, so that safe construction can be realized.
If the floor height is only arranged according to the floor height of the building function requirement of the underground space, the floor height is often in conflict with the requirement of the jacking pipe height, the floor is in conflict with the jacking pipe structure, the jacking pipe construction requirement cannot be met, or the number of floors is increased, unnecessary investment waste is caused, the engineering investment is also wasted, and the construction period is prolonged meaninglessly.
If the floor height is arranged according to the clear distance requirement of the pipe jacking construction process, the floor height of the pipe jacking layer in the pipe jacking working well is often too large, so that space waste is caused, and the underground space utilization rate is not economical.
Therefore, under the conditions of rapid development of technology, short construction period and severe environmental restriction conditions, the pipe-jacking working well can be safely, economically and efficiently completed by optimizing the pipe-jacking working well, and has important significance for the whole pipe-jacking project.
Disclosure of Invention
In view of the above defects in the prior art, the invention provides a method for arranging an overlapped pipe-jacking deep and large working well, which is carried out after the structure is constructed, and one of the purposes is to solve the contradiction between the floor height of the working well and the construction requirement of pipe jacking, avoid unnecessary floor heightening or floor number increasing, and economically, reasonably, safely and efficiently finish the arrangement of the overlapped pipe-jacking deep and large working well.
In order to achieve the purpose, the invention discloses a method for arranging a large working well with overlapped jacking pipes and deep depth after structure; the method comprises the following steps:
a. determining the plane size of the pipe jacking working well according to the functional arrangement of the underground space building and the construction process requirement of the pipe jacking; determining the floor height according to the floor height requirement of the underground space building, wherein the bottom elevation of the working well is determined according to the construction requirement of a jacking pipe;
b. in the implementation stage of the working well, a temporary space stress conversion system is adopted at the construction side of the jacking pipe; the temporary space stress conversion system specifically comprises a horizontal conversion beam and a temporary wall column, and is used as a side stress system of the working well in the construction stage of the jacking pipe for bearing water and soil pressure by combining the existing wall column and an additionally arranged inclined cast support; the non-pipe-jacking construction side is constructed according to the use requirements of the building, and the water pressure and the soil pressure are borne by the corresponding floor slab, the wall column and the side wall;
c. in the construction stage of the pipe jacking, pipe joints, slag, equipment and materials are hoisted by depending on the space reserved by post-cast floor slabs of each layer in the working well; constructing a bottom jacking pipe, and after the bottom jacking pipe is constructed, erecting a construction platform to construct a top jacking pipe;
d. after the construction of the jacking pipe is finished, according to the arrangement requirement of the floor slab in the using stage, the floor slab is cast in place for hole sealing, and after the floor slab, the wall column and the side wall stress system are established, redundant temporary structures are chiseled; finishing the interior decoration and equipment installation of the working well.
The invention has the beneficial effects that:
the invention solves the contradiction between the floor height of the working well and the construction requirement of the jacking pipe, avoids unnecessary floor heightening or floor number increasing, and economically, reasonably, safely and efficiently completes the arrangement of the overlapped jacking pipe deep and large working well.
The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, the features and the effects of the present invention.
Drawings
Fig. 1 shows a schematic plan layout of a working well according to an embodiment of the present invention.
Fig. 2 shows a schematic diagram of a working well profile arrangement according to an embodiment of the invention.
Fig. 3 is a schematic plan view of a headwall force system according to an embodiment of the present invention.
Fig. 4 is a schematic cross-sectional view of a headwall force system according to an embodiment of the present invention.
FIG. 5 is a schematic diagram illustrating an elevation of a headwall force system in accordance with an embodiment of the present invention.
Fig. 6 is a schematic view of a floor slab outside the channel area according to an embodiment of the invention.
FIG. 7 is a schematic representation of a floor slab within the confines of a passageway in accordance with an embodiment of the present invention.
FIG. 8 is a schematic plan view of the portal interface in an embodiment of the invention.
FIG. 9 is a schematic plan view of a portal interface after removal of a temporary component according to an embodiment of the present invention.
FIG. 10 is a cross-sectional view of a door interface after removing a temporary component according to an embodiment of the present invention.
Detailed Description
Examples
As shown in figure 1, a certain underground engineering channel is constructed by adopting a pipe jacking method, a left line channel and a right line channel are arranged, the underground engineering channel is an upper layer pipe jacking channel and a lower layer pipe jacking channel, the center distance of the channels is 12m, the channel width is 9.9m, the horizontal clear distance of the pipe jacking is 2.05m, the vertical clear distance of the pipe jacking is 5.5m, and the burial depth of the bottom of the pipe jacking is about 24 m. The working well belongs to a large working well with overlapped pipe jacking depth, and the arrangement method comprises the following steps:
a. according to the size and the distance of the jacking pipes, under the condition that no special building function is required, the transverse width of the working well is determined by meeting the construction space of the jacking pipes, and the net width of the structure is 26 m.
As shown in figure 2, according to the requirement of the floor height of the underground space building, the net height of 5m needs to be met, the floor height of the working well is arranged according to the net height, one floor and the second floor are arranged according to the minimum requirement of 5m, and the third floor adopts the floor height of 9m by combining with the operation space of pipe jacking construction.
The working well plane is arranged along the center of the two pipe jacking channels symmetrically, the structural columns and the structural longitudinal beams are arranged between the two channels, a single-column double-span rectangular frame structure is formed, the structural stress is reasonable, and the functional arrangement is clear.
b. In the implementation stage of the working well, according to the construction sequence of the conventional working well, firstly constructing a building envelope, then excavating and erecting supports, and constructing the structure again after excavating to the bottom of the well, constructing a bottom plate and a side wall, and dismantling the supports and constructing the structure in sequence.
As shown in fig. 3 to 5, a temporary space stress conversion system is adopted near the end wall of the pipe jacking volume, on the premise of not influencing pipe jacking construction, a horizontal conversion beam is arranged as a horizontal stress component, a wall column is temporarily enlarged to be used as a vertical stress component, and an inclined throwing support is arranged in a bottom span with larger stress of the wall column, so that the stress condition of the wall column is improved. The horizontal conversion beam, the vertical wall column and the side wall share the water and soil pressure at the end part.
As shown in fig. 6 and 7, the connectors are reserved at the side walls of the floor slab outside the range of the top pipe channel; and after the pipe jacking construction of the floor slab in the range of the pipe jacking channel is finished, the floor slab is constructed together when the pipe jacking joint is poured.
The non-pipe-jacking construction side is constructed according to the use requirements of buildings, and the floor slab, the wall column and the side wall bear the water and soil pressure together.
c. As shown in fig. 8, in the stage of pipe-jacking construction, the space left by post-cast floor slabs at each layer of the working well is relied on to hoist pipe joints, slag, equipment and materials, so that the convenience of pipe-jacking construction is ensured.
The top pipe construction is carried out by constructing a bottom pipe firstly and erecting a construction platform after the bottom pipe construction is finished.
d. And after the construction of the jacking pipes is finished, constructing the tunnel portal ring beam and the floor slab which is not poured yet, and integrally pouring the cast-in-place floor slab and the tunnel portal ring beam in the range of the channel of the jacking pipes.
As shown in fig. 5, 9 and 10, after the floor slab, the wall columns and the side walls are set, the redundant temporary structures, mainly the temporary wall columns and the temporary horizontal transfer beams, are chiseled.
And after the structure is completely constructed, performing interior decoration and equipment installation of the working well and the channel.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.

Claims (1)

1. A method for arranging a large working well with deep overlapped jacking pipes after the structure is manufactured; the method comprises the following steps:
a. determining the plane size of the pipe jacking working well according to the functional arrangement of the underground space building and the construction process requirement of the pipe jacking; determining the floor height according to the floor height requirement of the underground space building, wherein the bottom elevation of the working well is determined according to the construction requirement of a jacking pipe;
b. in the implementation stage of the working well, a temporary space stress conversion system is adopted at the construction side of the jacking pipe; the temporary space stress conversion system specifically comprises a horizontal conversion beam and a temporary wall column, and is used as a side stress system of the working well in the construction stage of the jacking pipe for bearing water and soil pressure by combining the existing wall column and an additionally arranged inclined cast support; the non-pipe-jacking construction side is constructed according to the use requirements of the building, and the water pressure and the soil pressure are borne by the corresponding floor slab, the wall column and the side wall;
c. in the construction stage of the pipe jacking, depending on the space left by post-cast floor slabs of each layer in the working well, hoisting pipe joints, slag, equipment and materials; constructing a bottom jacking pipe, and after the bottom jacking pipe is constructed, erecting a construction platform to construct a top jacking pipe;
d. after the construction of the jacking pipe is finished, according to the arrangement requirement of the floor slab in the using stage, the floor slab is cast in place for hole sealing, and after the floor slab, the wall column and the side wall stress system are established, redundant temporary structures are chiseled; finishing the interior decoration and equipment installation of the working well.
CN201811122393.8A 2018-09-26 2018-09-26 Arrangement method of overlapped pipe-jacking deep and large working well manufactured after structure Active CN109184703B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811122393.8A CN109184703B (en) 2018-09-26 2018-09-26 Arrangement method of overlapped pipe-jacking deep and large working well manufactured after structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811122393.8A CN109184703B (en) 2018-09-26 2018-09-26 Arrangement method of overlapped pipe-jacking deep and large working well manufactured after structure

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CN109184703B true CN109184703B (en) 2020-04-21

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Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3762603B2 (en) * 2000-02-04 2006-04-05 大成建設株式会社 Construction method of large section tunnel
JP2006118212A (en) * 2004-10-21 2006-05-11 Ishikawajima Harima Heavy Ind Co Ltd Tunnel, large cross-sectional tunnel and construction method of tunnel
CN102155025B (en) * 2011-03-23 2012-05-23 东南大学 Late poured band type assembled pipe jacking working open caisson
CN103726497B (en) * 2014-01-10 2016-06-22 中国地质大学(北京) Upper pipe working well reinforcing device
CN104879144B (en) * 2015-05-20 2016-09-28 上海市城市建设设计研究总院 The excavating construction method of the underground space is built with array push pipe in soft clay area
CN105370300A (en) * 2015-11-17 2016-03-02 中铁工程装备集团有限公司 Two-layer or multi-layer underground space construction method
CN105927252B (en) * 2016-06-14 2018-11-02 中铁隧道勘测设计院有限公司 It is a kind of to excavate big cross section underground space structure transforming methods of structural system using rectangular top pipe

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