CN101082279A - Peg-pole-prestress supporting system and construction method thereof - Google Patents

Peg-pole-prestress supporting system and construction method thereof Download PDF

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Publication number
CN101082279A
CN101082279A CN 200710118046 CN200710118046A CN101082279A CN 101082279 A CN101082279 A CN 101082279A CN 200710118046 CN200710118046 CN 200710118046 CN 200710118046 A CN200710118046 A CN 200710118046A CN 101082279 A CN101082279 A CN 101082279A
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China
Prior art keywords
jurisdiction
shield tunnel
pole
peg
duct
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CN 200710118046
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Chinese (zh)
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CN101082279B (en
Inventor
刘维宁
罗富荣
李兆平
路美丽
张新金
贺少辉
袁大军
郭婷
李晓霖
李海锋
许世伟
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北京交通大学
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Abstract

The invention provides a core of continuation station technology in the shield interval: pile-pole-prestressed supporting system and its engineering method. It arranges piles near the outside of the shield tunnel for a certain distance to isolate the field. Erect vertical temporary supporting poles on the opening side of the shield tunnel inner duct piece. Connect the reserved duct piece at the opening and the duct piece in certain range of both sides in series by the prestressed cable on the longitudinal direction and stretch to form an integral loading structure. It can reduce the tension and expanding tendency of the reserved duct piece at the opening during the duct piece damaging process and transfer the force system to the adjacent un-removal duct piece. The invention has great practical application value for the like projects. Its mine advantages include simple structure of the supporting system, strong deformability of controlling the duct piece, explicit dowel and easy monitoring. The supporting system can be standardized produced and repeated utilized. It can provide the traffic condition for the shield tunnel engineering as securing the stress safety maximatily.

Description

Peg-pole-prestress supporting system and job practices thereof
Technical field
What the present invention relates to is a kind of peg-pole-prestress supporting system (English for Pile-Column-Prestress Support System, as to abbreviate PCPrSS as) and job practices thereof, belongs to the underground structrue engineering technical field.
Background technology
Each metropolis of China is all at extensive development subway.Be to accelerate subway construction speed, improve workmanship, guarantee construction safety, the employing shield construction that subway sectional tunnel should be as much as possible, but be subjected to the influence of station construction, the efficient of shield machine fails to give full play to.Release the constructure scheme of on the interval basis of shield structure, expanding the station for this reason.This scheme can well solve the contradiction of station construction and interval shield-tunneling construction.In concrete construction, dismounting is during towards platform part shield duct piece, a ringent undefined structure has appearred in the stressed shield tunnel construction in domain section of jurisdiction, the pressure of soil layer may produce bigger distortion down around, cause section of jurisdiction vertical deformation and longitudinal relaxation, therefore need before remove the part section of jurisdiction, reinforce tunnel structure.This is the key point that can this constructure scheme be set up.
Summary of the invention
In order to ensure construction safety and architecture quality, the present invention proposes the interval core expanding station technology of shield structure, i.e. peg-pole-prestress supporting system and job practices thereof.
The technical solution adopted for the present invention to solve the technical problems is:
Applying the campshed isolation soil body near shield tunnel outside certain distance; Opening one bogie side frame in section of jurisdiction is established vertical temporary support columns in shield tunnel, simultaneously with the reservation section of jurisdiction of opening part and the section of jurisdiction in the certain limit of both sides vertically being together in series and carrying out stretch-draw by prestressed cable, form a monocoque structure.
A kind of peg-pole-prestress supporting system has the following steps;
Step 1: apply campshed near shield tunnel outside certain distance and isolate the soil body;
Step 2: in duct pieces of shield tunnel, set up temporary support columns;
Step 3: apply the duct that is reserved with prestressed cable in the prestressed section of jurisdiction, avoid the position of bolt hole simultaneously, certain structure is done in the prestressing force section of jurisdiction handle;
Step 4: the stretch-draw of prestressed cable symmetry, select suitable loading position and loading opportunity.
The present invention is applying the campshed isolation soil body near shield tunnel outside certain distance; In the tunnel, set up the temporary support columns vertical deformation in the control structure work progress to a certain extent; Apply prestressing force on vertically carries out section of jurisdiction self and reinforces in the section of jurisdiction, on the one hand can the control valve chip architecture in the vertical lax, can also form an interim beam column stress frame system with the temporary support columns in the tunnel on the other hand, be to be distributed to permanent structure to get on thereby can assist the transverse passage-way doorframe system of permanent structure with the out-of-balance force on the section of jurisdiction.
The present invention has extremely strong actual application value for similar engineering, and its main advantage is that support system is simple in structure, and control section of jurisdiction deformation ability is strong, and power transmission is clear and definite, is easy to monitoring; But the support system standardized production is reused; Support system is ensureing to greatest extent under the stressed safe prerequisite, the current condition of shield tunnel construction can be provided.
Description of drawings
Fig. 1 is the cross-sectional drawing at king-post position, king-post formula of the present invention station;
Fig. 2 is the peg-pole-prestress supporting system schematic diagram at transverse passage-way position, king-post formula of the present invention station.
Illustration
1. campshed; 2. temporary support columns; 3. prestressed cable; 4. section of jurisdiction; 5. reservation section of jurisdiction; 6. dismounting section of jurisdiction; 7. transverse passage-way.
The specific embodiment
The present invention is further described below in conjunction with drawings and Examples.
Embodiment 1: as Fig. 1, and shown in 2,
A kind of peg-pole-prestress supporting system job practices has the following steps:
1) campshed 1 is set from the distance of shield tunnel and diameter, the spacing of campshed 1;
Adopt suitable diameter and spacing that campshed 1 is set near outside shield tunnel, reach the effect of isolating the soil body.
The temporary support columns 2 of 2) in duct pieces of shield tunnel 4, setting up, the intensity and the stability of assurance shield tunnel temporary support columns 2;
Remove after the part duct pieces of shield tunnel 4 of transverse passage-way 7 positions, domain section of jurisdiction 4 stressed shield tunnel constructions have become a ringent undefined structure, the pressure of soil layer may produce bigger distortion down around, cause section of jurisdiction 4 vertical deformations, in duct pieces of shield tunnel 4, apply temporary support columns 2, can limit the vertical deformation of duct pieces of shield tunnel 4, thereby guarantee the stability of duct pieces of shield tunnel 4;
3) structure of prestressing force section of jurisdiction 4 is handled;
Apply the ducts that will be reserved with prestressed cable 3 in the prestressed section of jurisdiction 4, avoid the position of bolt hole simultaneously, prestressing force section of jurisdiction 4 will do that certain structure is handled in case drawing crack under the prestressing force effect, and also will there be enough anchoring thickness section of jurisdiction, end 4.The design of prestressing force section of jurisdiction 4 divides 4 designs of non-anchored end section of jurisdiction and 4 designs of anchored end section of jurisdiction.Only need in the non-anchored end section of jurisdiction 4 to reserve prestressed cable 3 ducts, than being easier to, need not remake specially treated for steel pipe sheet 4; Concerning reinforced concrete segment 4, need make special structure and handle, such as the special tectonic measure around the quantity of reinforcement that strengthens reinforcing bar, the duct in case section of jurisdiction 4 by prestressed cable 3 drawing cracks etc.And anchored end section of jurisdiction 4 not only will have prestressed cable 3 ducts, also need leave certain anchoring thickness, and the operating space will guarantee that also this still is than being easier to realize concerning steel pipe sheet 4; And, guaranteed certain anchoring thickness to the reinforced concrete segment 4 of 1.2m width only, and just can't guarantee prestressed operating space, this just need make prestressed cable 3 ducts bending, applies to be incorporated into tunnel internal.
4) the symmetrical stretch-draw of prestressed cable 3, loading position and opportunity;
Remove after the part shield duct piece 4 of transverse passage-way 7 positions, domain section of jurisdiction 4 stressed shield tunnel constructions have become a ringent undefined structure, and the pressure of soil layer may produce bigger distortion down around, causes section of jurisdiction 4 longitudinal relaxations.Can make section of jurisdiction 4 symmetrical stretch-draw prestressing force cable wires 3 to keep section of jurisdiction 5 behind the opening and contiguous domain section of jurisdiction 4 forms an integral body in the vertical, carry jointly and be out of shape, select appropriate loading position and opportunity also very important simultaneously.
Embodiment 2: as Fig. 1, and shown in 2,
Apply campshed 1 near the shield tunnel outside and isolate the soil body; Section of jurisdiction 4 openings, one bogie side frame is established vertical temporary support columns 2 in shield tunnel, reservation section of jurisdiction 5 and the section of jurisdiction 4 in the certain limit of both sides with opening part vertically is being together in series by prestressed cable 3 and carrying out stretch-draw simultaneously, form a monocoque structure, abolish process split shed place and keep the tension of section of jurisdiction 5 and open trend thereby reduced section of jurisdiction 4, and reach power system is transformed into purpose on the adjacent section of jurisdiction 4 of not removing.
A kind of peg-pole-prestress supporting system job practices: have the following steps;
(1) adopts the campshed 1 of suitable diameter and spacing near outside shield tunnel, reach the effect of isolating the soil body;
The temporary support columns 2 of (2) setting up in shield tunnel must satisfy intensity and stability requirement, and the vertical deformation that 6 backs, section of jurisdiction keep section of jurisdiction 5 is removed in restriction;
(3) apply the ducts that will be reserved with prestressed cable 3 in the prestressed section of jurisdiction 4, avoid the position of bolt hole simultaneously, prestressing force section of jurisdiction 4 will do that certain structure is handled in case drawing crack under the prestressing force effect, and also will there be enough anchoring thickness section of jurisdiction, end 4.
(4) prestressed cable 3 must symmetrical stretch-draw, guarantee simultaneously the prestressing force size can make the reservation section of jurisdiction 5 of removing behind the section of jurisdiction 6 can and contiguous section of jurisdiction 4 carry jointly, select suitable loading position and loading also very important opportunity in addition.

Claims (6)

1. a peg-pole-prestress supporting system is characterized in that: apply campshed (1) near shield tunnel outside certain distance and isolate the soil body; Section of jurisdiction in shield tunnel (4) opening one bogie side frame is established vertical temporary support columns (2), simultaneously with the section of jurisdiction (4) in the reservation section of jurisdiction (5) of opening part and the both sides certain limit vertically being together in series and carrying out stretch-draw by prestressed cable (3), form a monocoque structure.
2. a peg-pole-prestress supporting system job practices is characterized in that, has the following steps:
Step 1: apply campshed near shield tunnel outside certain distance and isolate the soil body;
Step 2: in duct pieces of shield tunnel, set up temporary support columns;
Step 3: apply the duct that is reserved with prestressed cable in the prestressed section of jurisdiction, avoid the position of bolt hole simultaneously, certain structure is done in the prestressing force section of jurisdiction handle;
Step 4: the stretch-draw of prestressed cable symmetry, select suitable loading position and loading opportunity.
3. a kind of peg-pole-prestress supporting system job practices according to claim 2 is characterized in that: have campshed (1) to be set from the distance of shield tunnel and the diameter of campshed (1), the step of spacing.
4. a kind of peg-pole-prestress supporting system job practices according to claim 2, it is characterized in that: the step that the temporary support columns (2) of setting up in shield tunnel is arranged, satisfy intensity and stability requirement, the vertical deformation that back, section of jurisdiction (6) keeps section of jurisdiction (5) is removed in restriction.
5. a kind of peg-pole-prestress supporting system job practices according to claim 2, it is characterized in that: apply the duct that is reserved with prestressed cable (3) in the prestressed section of jurisdiction (4), avoid the position of bolt hole simultaneously, prestressing force section of jurisdiction (4) are done the structure processing in case drawing crack under the prestressing force effect strengthens the quantity of reinforcement of reinforcing bar, the special tectonic measure around the duct to reinforced concrete segment (4); There is prestressed cable (3) duct anchored end section of jurisdiction (4), anchoring thickness is arranged, and bending is made in prestressed cable (3) duct, applies to be incorporated into tunnel internal.
6. a kind of peg-pole-prestress supporting system job practices according to claim 2 is characterized in that: the symmetrical stretch-draw of prestressed cable (3), select suitable loading position and loading opportunity.
CN2007101180463A 2007-06-27 2007-06-27 Peg-pole-prestress supporting system and construction method thereof Expired - Fee Related CN101082279B (en)

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CN2007101180463A CN101082279B (en) 2007-06-27 2007-06-27 Peg-pole-prestress supporting system and construction method thereof

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CN101082279B CN101082279B (en) 2010-10-06

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102071949A (en) * 2011-02-24 2011-05-25 湖南省交通规划勘察设计院 Pile type composite tube roofing cover arch structure for tunnel portal and construction method thereof
CN102071948A (en) * 2011-02-24 2011-05-25 湖南省交通规划勘察设计院 Door type composite pipe roof umbrella arch structure for tunnel opening and construction method thereof
CN102094665A (en) * 2011-01-05 2011-06-15 西南交通大学 Auxiliary support method for additional load during approaching construction of porous tunnel by shield method
CN102678127A (en) * 2011-03-09 2012-09-19 董勤银 Method for constructing weakly consolidated non-stratified sandstone tunnel
CN104453940A (en) * 2014-11-28 2015-03-25 中铁第四勘察设计院集团有限公司 Shield tunnel longitudinal early warning connecting structure
CN105089670A (en) * 2015-07-26 2015-11-25 北京工业大学 Construction method for enlarging and excavating subway station on basis of parallel interval shield tunnel

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2108173U (en) * 1991-11-21 1992-06-24 重庆长江橡胶厂 Waterproof slab hanging bogie for tunnel
JP3075554B2 (en) * 1996-05-23 2000-08-14 日立建機株式会社 Electa device

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102094665B (en) * 2011-01-05 2013-04-10 西南交通大学 Auxiliary support method for additional load during approaching construction of porous tunnel by shield method
CN102094665A (en) * 2011-01-05 2011-06-15 西南交通大学 Auxiliary support method for additional load during approaching construction of porous tunnel by shield method
CN102071948A (en) * 2011-02-24 2011-05-25 湖南省交通规划勘察设计院 Door type composite pipe roof umbrella arch structure for tunnel opening and construction method thereof
CN102071949B (en) * 2011-02-24 2013-01-16 湖南省交通规划勘察设计院 Pile type composite tube roofing cover arch structure for tunnel portal and construction method thereof
CN102071948B (en) * 2011-02-24 2013-01-16 湖南省交通规划勘察设计院 Door type composite pipe roof umbrella arch structure for tunnel opening and construction method thereof
CN102071949A (en) * 2011-02-24 2011-05-25 湖南省交通规划勘察设计院 Pile type composite tube roofing cover arch structure for tunnel portal and construction method thereof
CN102678127A (en) * 2011-03-09 2012-09-19 董勤银 Method for constructing weakly consolidated non-stratified sandstone tunnel
CN102678127B (en) * 2011-03-09 2014-07-30 董勤银 Method for constructing weakly consolidated non-stratified sandstone tunnel
CN104453940A (en) * 2014-11-28 2015-03-25 中铁第四勘察设计院集团有限公司 Shield tunnel longitudinal early warning connecting structure
CN105089670A (en) * 2015-07-26 2015-11-25 北京工业大学 Construction method for enlarging and excavating subway station on basis of parallel interval shield tunnel

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