CN110030005B - Light circular protection supporting system for shield tunnel and construction method thereof - Google Patents

Light circular protection supporting system for shield tunnel and construction method thereof Download PDF

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Publication number
CN110030005B
CN110030005B CN201910248410.0A CN201910248410A CN110030005B CN 110030005 B CN110030005 B CN 110030005B CN 201910248410 A CN201910248410 A CN 201910248410A CN 110030005 B CN110030005 B CN 110030005B
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China
Prior art keywords
support
support rod
rod piece
bent
base
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Chinese (zh)
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CN110030005A (en
Inventor
曹伟
王立新
王俊
邵莹
韩建
汪珂
戴志仁
杨罡
胡瑞青
李储军
王天明
雷永生
高志宏
张海
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China Railway First Survey and Design Institute Group Ltd
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China Railway First Survey and Design Institute Group Ltd
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Priority to CN201910248410.0A priority Critical patent/CN110030005B/en
Publication of CN110030005A publication Critical patent/CN110030005A/en
Application granted granted Critical
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Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/04Lining with building materials
    • E21D11/08Lining with building materials with preformed concrete slabs
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/04Lining with building materials
    • E21D11/08Lining with building materials with preformed concrete slabs
    • E21D11/086Methods of making concrete lining segments
    • 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
    • E21D9/06Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
    • E21D9/0607Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield being provided with devices for lining the tunnel, e.g. shuttering

Abstract

The invention relates to a light circular protection support system of a shield tunnel and a construction method thereof, comprising a plurality of rows of support bent frames which are arranged in parallel along the longitudinal direction of the tunnel in the shield tunnel, wherein the support bent frames are positioned in a vertical plane and are hexagonal star-shaped frames consisting of six support rod pieces with equal length, and the end parts of the support rod pieces are fixed on a shield segment structure; a regular hexagon area is formed in each supporting bent, and a longitudinal passing platform is arranged above the horizontal supporting rod piece of each supporting bent in the regular hexagon area. The invention is suitable for the circle-protecting support treatment of the influence areas such as disturbance or deformation of the existing shield tunnel, fully utilizes the characteristics of rapid installation, high bearing capacity, repeated utilization and the like of the triangular stability and the steel support, inhibits the deformation, ensures normal traffic capacity and safe structure, has strong operability and can realize industrialized operation.

Description

Light circular protection supporting system for shield tunnel and construction method thereof
Technical Field
The invention relates to the technical field of tunnels and underground engineering, in particular to a light circular protection support system for a shield tunnel and a construction method thereof.
Background
Along with the continuous improvement of construction technology, construction level and construction requirements, more and more new processes and new construction methods are applied to the construction of tunnels and underground engineering, and shield machines are used as typical representatives of tunnel mechanical excavation and are gradually and widely applied to the tunnel construction in the traffic engineering field, the hydraulic engineering field and the urban rail transit field. Especially in the construction of tunnels crossing rivers and urban tunnels, the shield machine gradually becomes the first choice of various construction methods due to the advantages of rapidness, safety, high quality, environmental protection, civilized construction and the like.
Considering the influence of factors such as adjacent peripheral engineering construction or shield tunnel auxiliary construction or underground environment change, the existing stress balance system of the shield tunnel is broken, so that certain deformation or potential safety hazard exists; meanwhile, the traditional round protection support system is heavy, low in repeated utilization rate and long in installation time. Therefore, a light circle-protecting support system is needed to solve the influence on disturbance or deformation of the existing shield tunnel, and ensure the normal traffic capacity, the structural safety and the smooth construction of peripheral engineering of the shield tunnel.
Disclosure of Invention
The invention aims to provide a light circular protection support system for a shield tunnel and a construction method thereof, which can ensure normal traffic capacity, structural safety and smooth construction of peripheral engineering after the stress balance system of the existing shield tunnel is broken, and reduce construction risks.
The technical scheme adopted by the invention is as follows:
the light shield tunnel circle-protecting support system is characterized in that:
the shield tunnel comprises a plurality of rows of support bent frames which are longitudinally and parallelly arranged along the tunnel in the shield tunnel, wherein the support bent frames are positioned in a vertical plane and are hexagonal star-shaped frames consisting of six support rod pieces with equal length, and the end parts of the support rod pieces are fixed on a shield segment structure.
A regular hexagon area is formed in each supporting bent, and a longitudinal passing platform is arranged above the horizontal supporting rod piece at the bottom of each supporting bent in the regular hexagon area.
The end part of the support rod piece is fixed on the shield segment structure through the support base;
the outer side of the support base is a cambered surface and clings to the shield segment structure, and the inner side of the support base is a plane which is used as a fixing surface of the end part of the support rod piece.
The end part of the support rod is fixedly welded with a support rod connecting backing plate, and the support rod connecting backing plate is fixed on the support base through a connecting bolt.
A support base connecting backing plate is arranged between the outer side of the support base and the shield segment structure and is fixed to the shield segment structure through a chemical anchor bolt.
Every three supporting rods in the supporting bent frame form two regular triangle frames, and the vertex angles of the two regular triangle frames are different by 60 degrees.
Two regular triangle frames in the support bent are closely attached longitudinally back and forth, and the intersection of the support rod pieces is fixedly connected through a longitudinal connecting member with longitudinal through length;
the longitudinal connecting member is connected with the support rod member by welding or binding.
The bottom surface of the passing platform is positioned on the longitudinal connecting member of the horizontal supporting rod piece in the supporting bent.
The shield segment structure is a prefabricated reinforced concrete structure;
the support rod piece, the support base and the longitudinal connecting structural member are seamless steel pipes, welded pipes, section steel or combined section steel;
the support rod piece connecting backing plate and the support base connecting backing plate are steel plates, angle steels or channel steels;
the passing platform is a wood board, a steel plate, a precast reinforced concrete slab, a cement-based panel or a composite panel.
The construction method of the shield tunnel light circular protection support system is characterized by comprising the following steps of:
the method comprises the following steps:
step one: manufacturing a supporting bent and accessories:
blanking in a factory, processing support bent frames and accessories, welding support rod piece connecting base plates at two ends of the support rod pieces, and firmly welding the support base connecting base plates with the outer arc surfaces of the support base; processing a passing platform;
step two: lofting and positioning, and installing a supporting base:
carrying the support bent and accessories to the site, accurately lofting on the shield segment structure, and determining the installation and positioning of the support base; drilling holes on the shield segment structure, and fixing the support base through a chemical anchor bolt;
step three: erecting a support rod piece:
installing a support rod piece from bottom to top, and connecting the support rod piece with a support base into a whole through a connecting bolt;
step four: erecting a longitudinal connecting structural member:
the longitudinal connecting structural members are erected symmetrically from bottom to top, and are firmly connected with the support rod pieces through welding or binding, so that the integrity of the support rod pieces is ensured;
step five: paving a passing platform:
and a longitudinal passing platform is erected in the hexagonal space formed by intersecting the support rods, and two ends of the passing platform are fixed with the longitudinal connecting structural members, so that the safety passing capability is realized.
The invention has the following advantages:
the method is used for carrying out circle-protecting support treatment on the influence areas such as disturbance or deformation of the existing shield tunnel. The structure type is simple and reasonable in stress, the characteristics of quick installation, high bearing capacity, reusability and the like of the steel support are fully utilized, the specific conditions of the structure type, the space size and the like of the existing structure are comprehensively considered, the stability of the triangle and the mechanical advantage of the steel structure are ingeniously utilized, an effective supporting system is quickly formed, deformation is effectively restrained, the requirements on structural safety and ellipticity of a shield tunnel are ensured, and the shield tunnel has normal traffic capacity; meanwhile, the structure has strong operability, can realize industrial operation, wins time for subsequent construction, has higher economic and social benefits, and has wide application value in engineering such as railway, highway, water conservancy, urban rail transit, municipal pipe network and the like.
Drawings
Fig. 1 is an elevation view of the structure of the present invention.
Fig. 2 is a large sample diagram a.
In the figure, 1-shield segment structure, 2-support rod piece, 3-support base, 4-chemical anchor bolt, 5-support rod piece connection backing plate, 6-connecting bolt, 7-support base connection backing plate, 8-longitudinal connecting member and 9-passing platform.
Detailed Description
The present invention will be described in detail with reference to the following embodiments.
The invention relates to a light circle-protecting support system of a shield tunnel, which is a light circle-protecting support structure with traffic capacity, and comprises a plurality of rows of support bent frames which are longitudinally and parallelly arranged along the tunnel in the shield tunnel, wherein the support bent frames are positioned in a vertical plane and are hexagonal star-shaped frames consisting of six support rod pieces 2 with equal length, and the end parts of the support rod pieces 2 are fixed on a shield segment structure 1. A regular hexagon area is formed in the supporting bent frame, and a longitudinal passing platform 9 is arranged above the horizontal supporting rod pieces 2 of each supporting bent frame in the regular hexagon area, so that the safe passing capability is realized.
The end part of the support rod piece 2 is fixed on the shield segment structure 1 through the support base 3; the outer side of the support base 3 is a cambered surface and is clung to the shield segment structure 1, and the inner side is a plane which is used as a fixing surface of the end part of the support rod piece 2. The end part of the support rod piece 2 is fixedly welded with a support rod piece connecting base plate 5, screw holes for alignment are reserved on the support rod piece connecting base plate 5 and the support base 3, and the support rod piece connecting base plate 5 is fixed on the support base 3 through a connecting bolt 6. A support base connecting backing plate 7 is arranged between the outer side of the support base 3 and the shield segment structure 1, the extrados and the shield segment structure 1 are concentric circles and welded on the support base connecting backing plate 7 which is matched with the shield segment structure 1, screw holes are reserved in the support base connecting backing plate 7, and the support base connecting backing plate is fixed on the shield segment structure 1 through a chemical anchor bolt 4.
Every three support rods 2 in the support bent frame form two regular triangle frames, and the vertex angles of the two regular triangle frames are different by 60 degrees. Two regular triangle frames in the support bent are closely attached longitudinally back and forth, and the intersection of the support rod pieces 2 is fixedly connected through a longitudinal connecting member 8; the longitudinal connecting members 8 are connected with the support bars 2 by welding or binding, ensuring the integrity. The bottom surface of the passing platform 9 is positioned on the longitudinal connecting members 8 of the horizontal support bars 2 in the support bent.
The shield segment structure 1 is a prefabricated reinforced concrete structure; the support rod piece 2, the support base 3 and the longitudinal connecting structural member 8 are seamless steel pipes, welded pipes, section steel or combined section steel; the support rod piece connecting backing plate 5 and the support base connecting backing plate 7 are steel plates, angle steels or channel steels; the passing platform 9 is a wood board (including square wood), a steel plate (including section steel), a precast reinforced concrete plate, a composite plate and the like.
The longitudinal spacing of the bent frame is 0.8-2.0 m, the overall height is 5.0-12.0 m, and the bent frame is suitable for a shield tunnel with the outer diameter of 5.5-12.8 m; the supporting rod pieces 2 form an included angle of 60 degrees, and the length of the included angle is about 87% of the whole height of the bent frame; the thickness of the supporting base 3 is 300-500 mm, and the circumferential spacing is 60 degrees; the thickness of the support rod piece connecting backing plate 5 and the support base connecting backing plate 7 is 8-20 mm; the specifications of the connecting bolt 6 and the chemical anchor bolt 4 are M12-M24; the support base connecting backing plate 7 is equal to the support base 3 in length, and the width of two sides of the backing plate is 80-150 mm wider than that of the support base 3; the length and width of the supporting member 2 are 50-100 mm smaller than those of the supporting member connecting backing plate 5; the length of the passing platform 9 is 1.5-3.0 m, the width of the single block is 0.5-1.0 m, and the thickness is 30-100 mm.
The dimension of the invention is generally based on the structural type and the space dimension of the existing structure, and the rigidity of the components is enough to resist the stress change caused by the adjacent peripheral engineering construction or the auxiliary construction of the shield tunnel or the underground environment change; the passing platform should be provided with a certain personnel running, overhauling, monitoring and operating safety channel.
The invention adopts the section steel or the combined section steel to assemble and connect all parts through chemical anchor bolts, bolts or welding, and the style of the backing plate is matched with the existing structure and supporting member; and all parts are longitudinally connected into a whole through the supporting member, the supporting base and the longitudinal connecting member such as combined section steel, angle steel, channel steel and the like, so that the overall stability of the round protection supporting system is ensured.
The invention can meet the requirement of circle-protecting support treatment on the influence areas such as disturbance or deformation of the existing shield tunnel. After the invention is applied, along with the differences of the prior structural space size, structural type, adjacent engineering construction method, geological condition, tunnel burial depth, surrounding environment and the like adopted in specific engineering, the related structural parameters can be larger or smaller, more or less, longer or shorter, stronger or weaker according to the actual engineering needs, such as: the support structure comprises support members, support bases, longitudinal connecting members, support base connecting base plates, support member connecting base plates, chemical anchor bolts, connecting bolts, passing platforms and the like, wherein the number, the longitudinal spacing, the overall height, the width and the like of the support structures are equal to those of the support members, the support bases, the longitudinal connecting members, the support base connecting base plates, the support member connecting base plates, the chemical anchor bolts, the connecting bolts, the passing platforms and the like.
The construction method of the shield tunnel light circular protection support system comprises the following steps:
step one: manufacturing a supporting bent and accessories:
blanking in a factory, processing support bent frames and accessories, welding support rod piece connecting base plates 5 at two ends of a support rod piece 2, and firmly welding a support base connecting base plate 7 with an outer arc surface of a support base 3; a processing passing platform 9;
step two: lofting and positioning, and installing a supporting base 3:
carrying the support bent and accessories to the site, accurately lofting on the shield segment structure 1, and determining the installation and positioning of the support base 3; drilling holes on the shield segment structure 1, and fixing the support base 3 through a chemical anchor bolt 4;
step three: erecting a support rod piece 2:
the support rod piece 2 is installed from bottom to top and is connected with the support base 3 into a whole through the connecting bolt 6;
step four: erecting a longitudinal connecting structural member 8:
the longitudinal connecting structural members 8 are erected symmetrically from bottom to top, and are firmly connected with the support rod pieces 2 through welding or binding, so that the integrity of the support rod pieces is ensured;
step five: laying a passing platform 9:
longitudinal passing platforms 9 are erected in the hexagonal space formed by intersecting the support rods 2, and two ends of each passing platform 9 are fixed with the longitudinal connecting structural members 8, so that the safety passing capability is realized.
The invention is used for carrying out circle-protecting supporting treatment on the influence areas such as disturbance or deformation of the existing shield tunnel, skillfully utilizes the stability of the triangle and the mechanical advantage of the steel structure, quickly forms an effective supporting system, effectively inhibits the deformation, ensures the structural safety and ovality requirements of the shield tunnel, and has normal traffic capacity.
The content of the invention is not limited to the examples listed, and any equivalent transformation to the technical solution of the invention that a person skilled in the art can take on by reading the description of the invention is covered by the claims of the invention.

Claims (3)

1. The utility model provides a shield tunnel light-duty protection support system which characterized in that:
the shield tunnel comprises a plurality of rows of support bent frames which are arranged in parallel in the longitudinal direction of the tunnel in the shield tunnel, wherein the support bent frames are positioned in a vertical plane and are hexagonal star-shaped frames consisting of six support rod pieces (2) with equal length, and the end parts of the support rod pieces (2) are fixed on a shield segment structure (1);
a regular hexagon area is formed in each support bent, and a longitudinal passing platform (9) is arranged above the bottom horizontal support rod piece (2) of each support bent in the regular hexagon area;
the end part of the support rod piece (2) is fixed on the shield segment structure (1) through the support base (3);
the outer side of the support base (3) is a cambered surface and is clung to the shield segment structure (1), and the inner side is a plane which is used as a fixing surface of the end part of the support rod piece (2);
a support rod piece connecting base plate (5) is welded and fixed at the end part of the support rod piece (2), and the support rod piece connecting base plate (5) is fixed on the support base (3) through a connecting bolt (6);
a support base connecting backing plate (7) is arranged between the outer side of the support base (3) and the shield segment structure (1), and is fixed on the shield segment structure (1) through a chemical anchor bolt (4);
every three support rods (2) in the support bent frame form two regular triangle frames, and the difference between the vertex angles of the two regular triangle frames is 60 degrees;
two regular triangle frames in the support bent are longitudinally and closely attached to each other, and the intersection of the support rod pieces (2) is fixedly connected through a longitudinal connecting member (8) with longitudinal through length;
the longitudinal connecting member (8) is connected with the support rod piece (2) in a welding or binding mode;
the bottom surface of the passing platform (9) is positioned on a longitudinal connecting member (8) of the horizontal support rod piece (2) in the support bent.
2. The shield tunnel lightweight circle-preserving support system of claim 1, wherein:
the shield segment structure (1) is a prefabricated reinforced concrete structure;
the support rod piece (2), the support base (3) and the longitudinal connecting member (8) are seamless steel pipes, welded pipes, section steel or combined section steel;
the support rod piece connecting backing plate (5) and the support base connecting backing plate (7) are steel plates, angle steels or channel steels;
the passing platform (9) is a wood board, a steel plate, a precast reinforced concrete slab, a cement-based panel or a composite panel.
3. The construction method of the shield tunnel light circle-protecting support system according to claim 2, wherein the construction method comprises the following steps:
the method comprises the following steps:
step one: manufacturing a supporting bent and accessories:
blanking in a factory, processing support bent frames and accessories, welding support rod piece connecting base plates (5) at two ends of a support rod piece (2), and firmly welding support base connecting base plates (7) with an outer arc surface of a support base (3); a processing passing platform (9);
step two: lofting location, installation support base (3):
carrying the support bent and accessories to the site, accurately lofting on the shield segment structure (1), and determining the installation and positioning of the support base (3); drilling holes on the shield segment structure (1), and fixing the supporting base (3) through a chemical anchor bolt (4);
step three: erecting a support rod piece (2):
the support rod piece (2) is installed from bottom to top and is connected with the support base (3) into a whole through the connecting bolt (6);
step four: erecting a longitudinal connecting member (8):
the longitudinal connecting members (8) are erected symmetrically from bottom to top, and are firmly connected with the support rod pieces (2) through welding or binding, so that the integrity of the support rod pieces is ensured;
step five: paving a passing platform (9):
longitudinal passing platforms (9) are erected in the hexagonal space formed by intersecting the support rods (2), and two ends of each passing platform (9) are fixed with the longitudinal connecting members (8) and have the capability of safe passing.
CN201910248410.0A 2019-03-29 2019-03-29 Light circular protection supporting system for shield tunnel and construction method thereof Active CN110030005B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910248410.0A CN110030005B (en) 2019-03-29 2019-03-29 Light circular protection supporting system for shield tunnel and construction method thereof

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Application Number Priority Date Filing Date Title
CN201910248410.0A CN110030005B (en) 2019-03-29 2019-03-29 Light circular protection supporting system for shield tunnel and construction method thereof

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CN110030005A CN110030005A (en) 2019-07-19
CN110030005B true CN110030005B (en) 2023-09-15

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111894636B (en) * 2020-08-11 2022-03-25 中铁电气化局集团有限公司 Duct piece supporting structure of communication channel of shield interval tunnel

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0932463A (en) * 1995-07-19 1997-02-04 Tokyo Met Gov Gesuido Service Kk Construction method for joining shield tunnel at crossing
JPH11173064A (en) * 1997-12-12 1999-06-29 Taisei Corp Coupling method for shield tunnel
KR101005606B1 (en) * 2010-06-07 2011-02-07 김태균 Wind duct slab construction method of shield tunnel
CN107060815A (en) * 2017-05-22 2017-08-18 中铁第勘察设计院集团有限公司 The iterative structure and its construction method of longitudinal concealed beam and shield duct piece in railway roadbed
CN109113750A (en) * 2018-10-30 2019-01-01 中铁第勘察设计院集团有限公司 Shield end reinforces the emergency set and its construction method of failure
CN109209401A (en) * 2018-09-28 2019-01-15 中铁第勘察设计院集团有限公司 Shield tunnel inner circular support system and its construction method based on brace pre axial force
CN109356597A (en) * 2018-11-19 2019-02-19 中铁第四勘察设计院集团有限公司 A kind of track deformation control structure in the shield tunnel for being set to bottom gallery

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0932463A (en) * 1995-07-19 1997-02-04 Tokyo Met Gov Gesuido Service Kk Construction method for joining shield tunnel at crossing
JPH11173064A (en) * 1997-12-12 1999-06-29 Taisei Corp Coupling method for shield tunnel
KR101005606B1 (en) * 2010-06-07 2011-02-07 김태균 Wind duct slab construction method of shield tunnel
CN107060815A (en) * 2017-05-22 2017-08-18 中铁第勘察设计院集团有限公司 The iterative structure and its construction method of longitudinal concealed beam and shield duct piece in railway roadbed
CN109209401A (en) * 2018-09-28 2019-01-15 中铁第勘察设计院集团有限公司 Shield tunnel inner circular support system and its construction method based on brace pre axial force
CN109113750A (en) * 2018-10-30 2019-01-01 中铁第勘察设计院集团有限公司 Shield end reinforces the emergency set and its construction method of failure
CN109356597A (en) * 2018-11-19 2019-02-19 中铁第四勘察设计院集团有限公司 A kind of track deformation control structure in the shield tunnel for being set to bottom gallery

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