CN110259484B - Shield tunnel reinforcing structure based on Z-shaped steel plate and construction method - Google Patents
Shield tunnel reinforcing structure based on Z-shaped steel plate and construction method Download PDFInfo
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- CN110259484B CN110259484B CN201910446919.6A CN201910446919A CN110259484B CN 110259484 B CN110259484 B CN 110259484B CN 201910446919 A CN201910446919 A CN 201910446919A CN 110259484 B CN110259484 B CN 110259484B
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- shaped steel
- steel plate
- reinforcing
- tunnel
- segment
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/08—Lining with building materials with preformed concrete slabs
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
- E21D11/15—Plate linings; Laggings, i.e. linings designed for holding back formation material or for transmitting the load to main supporting members
Abstract
The invention relates to a shield tunnel reinforcing structure based on Z-shaped steel plates and a construction method thereof, wherein the reinforcing structure comprises Z-shaped steel plates adhered to the inner cambered surface of a shield segment in a region to be reinforced, each Z-shaped steel plate is composed of a plurality of Z-shaped steel plate units arranged side by side, each Z-shaped steel plate unit is composed of an integrally formed flange, web plate and bottom plate, adjacent Z-shaped steel plate units are formed at one time or are connected and formed through flange welding or connecting pieces, and two web plates and the bottom plate form an inverted trapezoid groove, and the arrangement direction of the inverted trapezoid groove is along the circumferential direction of a tunnel. Compared with the prior art, the invention has the advantages of various reinforcement modes, obvious reinforcement effect, large flange area, large rigidity and the like.
Description
Technical Field
The invention relates to the technical field of constructional engineering, in particular to a shield tunnel reinforcing structure based on a Z-shaped steel plate and a construction method.
Background
The shield tunnel is formed by connecting duct pieces through bolts, and along with the continuous increase of the operation years, adverse conditions such as stratum conditions, vehicle operation, loading and unloading of surrounding environments and the like are included, so that the phenomena of duct piece structural deformation, cracking, concrete stripping, water leakage and the like occur on the part of the shield tunnel, and if reinforcement treatment is not timely carried out, the driving safety is endangered. The conventional shield tunnel repairing and reinforcing technology comprises an inner Zhang Gangjuan reinforcing method, an adhesive composite cavity reinforcing method, a lateral grouting reinforcing method and the like, but the existing method has the problems of high manufacturing cost, complex construction, long construction period and limited reinforcing effect.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a shield tunnel reinforcing structure based on a Z-shaped steel plate and a construction method.
The aim of the invention can be achieved by the following technical scheme:
a shield tunnel reinforced structure based on Z-shaped steel plates comprises Z-shaped steel plates adhered to the inner arc surface of a shield segment in a region to be reinforced, wherein each Z-shaped steel plate is composed of a plurality of Z-shaped steel plate units arranged side by side, each Z-shaped steel plate unit is composed of an integrally formed flange, web plates and a bottom plate, adjacent Z-shaped steel plate units are formed at one time or are connected and formed through flange welding or connecting pieces, and two web plates and the bottom plate form an inverted trapezoid groove, and the arrangement direction of the inverted trapezoid groove is along the circumferential direction of a tunnel.
Filling holes are preset in the bottom plate, and fillers are filled in the inverted trapezoidal grooves through the filling holes.
The flange is mutually bonded with the inner cambered surface of the shield segment in the region to be reinforced through an adhesive, an expansion bolt hole is formed in the flange, and the adhesive is solvent-free modified epoxy resin adhesive steel pouring glue or silica gel.
The filler is micro-expansion cement mortar or micro-expansion concrete.
The reinforcing form of the reinforcing structure comprises a joint local reinforcing form, a full-section equal-rigidity reinforcing form and a full-section variable-rigidity reinforcing form.
When the whole segment ring is free from deformation and opens or cracks only at the local joint position, the local joint reinforcement mode is selected, and a single piece or a plurality of Z-shaped steel plates are arranged at the position of the shield segment joint in the region to be reinforced and are fixed through expansion bolts on the flanges.
When the duct piece ring is deformed integrally, and the duct piece body is large in water leakage, sand leakage and convergence deformation, the reinforcing mode is selected to be a full-section equal-rigidity reinforcing mode, and the Z-shaped steel plates are arranged along the circumferential direction of the tunnel in a full circle and are fixed through expansion bolts on the flanges.
When the segment ring is deformed integrally, damage is concentrated at the segment joint, the segment ring body is reinforced in a full-section variable-rigidity reinforcing mode when no obvious disease exists, a plurality of Z-shaped steel plates are arranged along the circumferential direction of the tunnel, and two adjacent Z-shaped steel plates are reinforced in a steel bonding mode, so that the circumferential full-circle arrangement of the tunnel is formed.
A construction method of a shield tunnel reinforcing structure based on Z-shaped steel plates comprises the following steps:
step 1: carrying out tunnel safety evaluation according to the measurement result of the deformation condition of the shield tunnel;
step 2: selecting a shield tunnel reinforcement scheme according to a safety evaluation result, wherein the reinforcement scheme comprises a joint local reinforcement scheme, a full-section equal-rigidity reinforcement scheme and a full-section variable-rigidity reinforcement scheme, and simultaneously determining reinforcement rigidity;
step 3: manufacturing a Z-shaped steel plate according to the determined reinforcement rigidity, presetting filling holes in the Z-shaped steel plate, spreading the web plate of the Z-shaped steel plate along the circumferential direction of the tunnel, and combining the cambered surface of the Z-shaped steel plate with the inner cambered surface of the shield tunnel segment;
step 4: polishing the shield segment in the region to be reinforced by adopting an angle grinder, exposing a fresh surface and removing surface dust, and polishing and roughening the Z-shaped steel plate by adopting the angle grinder;
step 5: coating an adhesive at the contact position of the shield segment in the region to be reinforced and the Z-shaped steel plate, and pressurizing the Z-shaped steel plate unit to ensure that the adhesive overflows from the periphery of the Z-shaped steel plate;
step 6: performing block construction according to the size of the reinforcing area, repeating the step 5, and connecting all Z-shaped steel plates into a whole;
step 7: filling of the filler is performed through filling holes preset in the Z-shaped steel plate.
In the reinforcing process of the step 5 and the step 7, the falling off of the reinforcing member in the reinforcing process is avoided by additionally arranging a fixing facility, so that the construction safety in the reinforcing process is ensured, and the fixing facility is an expansion bolt or a chemical bolt.
Compared with the prior art, the invention has the following advantages:
1. the reinforcing mode is flexible, according to the evaluation result, the characteristic of the rigidity of the segment ring of the shield tunnel is combined, the Z-shaped steel plate with larger rigidity is adopted for locally reinforcing the weak point (segment joint), the segment body is correspondingly selected to be not reinforced, the steel plate with smaller rigidity is adopted for reinforcing or the segment ring is integrally reinforced according to the damage degree, when the integral state of the segment ring is better, only the local joint position is opened or cracked, the Z-shaped steel plate joint is adopted for locally reinforcing, when the segment ring is integrally deformed, but damage is concentrated on the segment joint, and when the segment ring body has no obvious damage, the full-section variable rigidity reinforcing method can be adopted; when the segment ring is deformed integrally and the segment body has serious diseases, a full-section equal-rigidity reinforcing method is adopted.
2. The Z-shaped steel plates are clung to the side of the shield tunnel duct piece along the duct piece ring direction, the radian consistent with the inner cambered surface of the duct piece is adopted, and each Z-shaped groove bottom along the tunnel axis direction is a plane, so that the Z-shaped steel plates have enough contact area to be convenient to bond with the duct piece structure.
3. According to the invention, the Z-shaped steel plate is adopted, a trapezoid wavy reinforcing structure is formed in the circumferential direction of the duct piece, the structural rigidity is effectively increased, meanwhile, the Z-shaped steel plate is in full contact with the duct piece, the effective bonding of the Z-shaped steel plate and the duct piece can be ensured, and the reinforcing effect is obviously improved.
4. In the Z-shaped steel plate unit adopted by the invention, as the inverted trapezoidal grouting grooves are adopted, the flange area of the contact bonding between the Z-shaped steel plate and the intrados of the shield segment is enlarged, the flange area is increased as much as possible, and the rigidity of the Z-shaped steel plate is effectively increased.
Drawings
FIG. 1 is a schematic cross-sectional view of a Z-shaped steel plate.
Fig. 2 is a structural cross-sectional view of a Z-shaped steel plate reinforced shield tunnel.
Fig. 3 is a plan development view of the Z-shaped steel plate.
Fig. 4 is a cross-sectional view of a Z-shaped steel plate for local reinforcement of a shield tunnel segment ring joint.
Fig. 5 is a cross-sectional view of a Z-shaped steel plate for full-section variable stiffness reinforcement.
Fig. 6 is a cross-sectional view of a Z-shaped steel plate for full-section equal stiffness reinforcement.
Detailed Description
The invention will now be described in detail with reference to the drawings and specific examples.
Examples
The invention is further described below with reference to the specific illustrations in order to make the technical means, the inventive features, the achieved objects and the effects of the invention easy to understand.
As shown in fig. 1-3, the invention provides a shield tunnel reinforcing structure based on a Z-shaped steel plate, which comprises a Z-shaped steel plate adhered to the inner cambered surface of a shield segment in a region to be reinforced, wherein the Z-shaped steel plate is composed of a plurality of Z-shaped steel plate units arranged side by side, each Z-shaped steel plate unit is composed of an integrally formed flange, a web plate and a bottom plate, the adjacent Z-shaped steel plate units are connected through flange welding or connecting pieces, a left web plate, a right web plate and a bottom plate form an inverted trapezoid groove, the arrangement direction of the inverted trapezoid groove is along the circumferential direction of a tunnel, filling holes are preset in the bottom plate, fillers are filled in the inverted trapezoid groove through the filling holes, the flanges are adhered to the inner cambered surface of the shield segment in the region to be reinforced through an adhesive, expansion bolt holes are formed in the inverted trapezoid groove, the adhesive is solvent-free modified epoxy resin adhesive steel pouring glue or silica gel, and the fillers are micro-expansion cement mortar or micro-expansion concrete.
The invention provides a construction method of a Z-shaped steel plate reinforced shield tunnel, which comprises the following steps:
s1, measuring deformation conditions of a shield tunnel, and evaluating the safety of the tunnel according to a measurement result, wherein the method specifically comprises the following steps: according to the conditions of cracking, staggering, joint opening, segment ring deformation, joint leakage and silt leakage of the shield tunnel segment, carrying out tunnel structure safety evaluation to obtain whether the corresponding evaluation section belongs to local damage or integral damage or general slight damage or serious damage;
s2, selecting a shield tunnel reinforcement scheme according to the evaluation result of the S1, wherein the reinforcement scheme comprises joint local reinforcement, full-section equal-rigidity reinforcement and full-section variable-rigidity reinforcement, and simultaneously determining reinforcement rigidity;
s3, manufacturing a Z-shaped steel plate unit according to the reinforcement rigidity determined in the S2, presetting filling holes on the Z-shaped steel plate unit according to requirements, and spreading web plates of the Z-shaped steel plate unit along the circumferential direction of the tunnel, wherein the cambered surface of the Z-shaped steel plate is consistent with the inner cambered surface of the shield tunnel segment;
s4, polishing the shield segment in the region to be reinforced by adopting an angle grinder, exposing a fresh surface, removing surface dust, and polishing and roughening the Z-shaped steel plate by adopting the angle grinder;
s5, coating an adhesive at the contact position of the shield segment in the region to be reinforced and the Z-shaped steel plate, wherein the adhesive is solvent-free modified epoxy resin type steel pouring adhesive or silica gel, and pressurizing the Z-shaped steel plate to ensure that the adhesive overflows from the periphery of the Z-shaped steel plate, and temporary fixing facilities are required to be added in the construction process, so that the reinforcing component is prevented from falling off in the reinforcing process. The pipe piece fixing facilities including expansion bolts and chemical bolts can be added according to the requirements;
s6, carrying out block construction according to the size of the reinforcing area, repeating S5, and connecting all Z-shaped steel plates into a whole in a welding or connecting piece mode.
S7, filling a filler which is micro-expansion cement mortar or micro-expansion concrete through a filling hole preset in the Z-shaped steel plate according to the requirement. Temporary fixing facilities are needed to be added in the construction process, so that the falling off of the reinforcing members in the reinforcing process is avoided.
Example 1:
according to the evaluation result, the whole state of the segment ring is good, only the partial joint position is opened or cracked, and the partial reinforcement scheme of the segment ring joint of the shield tunnel is determined, as shown in fig. 4. Polishing the region to be reinforced of the shield segment by adopting an angle grinder, exposing a fresh surface, cleaning dust, and polishing and roughening the Z-shaped steel plate by adopting the angle grinder; coating an adhesive at the contact position of the shield segment and the Z-shaped steel plate in the region to be reinforced, pressurizing the Z-shaped steel plate to ensure that the adhesive overflows from the periphery, and adding steel plate fixing facilities such as expansion bolts or chemical bolts and the like according to the requirement; carrying out block construction and welding or adopting a connecting piece to connect the steel plates into a whole; filling of the filler is performed through filling holes preset in the Z-shaped plate according to requirements.
Example 2:
according to the evaluation result, the segment ring is integrally deformed, but the defects are concentrated on the segment joint, the segment ring body has no obvious defects, and the full-section variable stiffness reinforcement method is carried out by adopting the segment ring of the shield tunnel, as shown in fig. 5. Polishing the region to be reinforced of the shield segment by adopting an angle grinder, exposing a fresh surface, cleaning dust clearly, and polishing and roughening the Z-shaped steel plate and the steel plate by adopting the angle grinder; coating an adhesive at the contact position of the shield segment and the Z-shaped steel plate in the region to be reinforced, pressurizing the Z-shaped steel plate to ensure that the adhesive overflows from the periphery, and adding steel plate fixing facilities such as expansion bolts or chemical bolts and the like according to the requirement; carrying out block construction and welding or adopting a connecting piece to connect the steel plates into a whole; filling of the filler is performed through filling holes preset in the Z-shaped plate according to requirements.
Example 3:
according to the evaluation result, the segment ring is integrally deformed, the segment body is seriously damaged, and the full-section equal-rigidity reinforcing method of the segment ring of the shield tunnel is adopted, as shown in fig. 6. Polishing the region to be reinforced of the shield segment by adopting an angle grinder, exposing a fresh surface, cleaning dust clearly, and polishing and roughening the Z-shaped steel plate by adopting the angle grinder; coating an adhesive at the contact position of the shield segment and the Z-shaped steel plate in the region to be reinforced, pressurizing the Z-shaped steel plate to ensure that the adhesive overflows from the periphery, and adding steel plate fixing facilities such as expansion bolts or chemical bolts and the like according to the requirement; carrying out block construction and welding or adopting a connecting piece to connect the steel plates into a whole; filling of the filler is performed through filling holes preset in the Z-shaped plate according to requirements.
Claims (1)
1. The construction method of the shield tunnel reinforcing structure based on the Z-shaped steel plates is characterized in that the reinforcing structure comprises Z-shaped steel plates bonded at the inner cambered surface of a shield segment in a region to be reinforced, each Z-shaped steel plate is composed of a plurality of Z-shaped steel plate units arranged side by side, each Z-shaped steel plate unit is composed of an integrally formed flange, web plate and bottom plate, adjacent Z-shaped steel plate units are formed at one time or are connected and formed through flange welding or connecting pieces, and two web plates and the bottom plate form an inverted trapezoid groove, and the arrangement direction of the inverted trapezoid groove is along the circumferential direction of a tunnel;
filling holes are preset in the bottom plate, and fillers are filled in the inverted trapezoidal grooves through the filling holes;
the flange is mutually bonded with the inner cambered surface of the shield segment in the region to be reinforced through an adhesive, an expansion bolt hole is formed in the flange, and the adhesive is solvent-free modified epoxy resin adhesive steel pouring glue or silica gel;
the filler is micro-expansion cement mortar or micro-expansion concrete;
the reinforcing form of the reinforcing structure comprises a joint local reinforcing form, a full-section equal-rigidity reinforcing form and a full-section variable-rigidity reinforcing form;
when the whole segment ring is free from deformation and only opens or cracks at the local joint position, selecting a joint local reinforcing mode, arranging a single piece or a plurality of Z-shaped steel plates at the position of the shield segment joint in the region to be reinforced, and fixing through expansion bolts on the flange;
when the duct piece ring is integrally deformed and the duct piece body is large in water leakage, sand leakage and convergence deformation, the reinforcement mode is selected to be a full-section equal-rigidity reinforcement mode, and the Z-shaped steel plates are arranged along the circumferential direction of the tunnel in a full circle and are fixed through expansion bolts on the flanges;
when the segment ring is integrally deformed but damage is concentrated at the segment joint, selecting a reinforcing mode as a full-section variable-rigidity reinforcing mode when the segment ring body has no obvious disease, arranging a plurality of Z-shaped steel plates along the circumferential direction of the tunnel, and reinforcing two adjacent Z-shaped steel plates in a steel bonding mode, thereby forming the circumferential full-circle arrangement of the tunnel;
the construction method comprises the following steps:
step 1: carrying out tunnel safety evaluation according to the measurement result of the deformation condition of the shield tunnel;
step 2: selecting a shield tunnel reinforcement scheme according to a safety evaluation result, wherein the reinforcement scheme comprises a joint local reinforcement scheme, a full-section equal-rigidity reinforcement scheme and a full-section variable-rigidity reinforcement scheme, and simultaneously determining reinforcement rigidity;
step 3: manufacturing a Z-shaped steel plate according to the determined reinforcement rigidity, presetting filling holes in the Z-shaped steel plate, spreading the web plate of the Z-shaped steel plate along the circumferential direction of the tunnel, and combining the cambered surface of the Z-shaped steel plate with the inner cambered surface of the shield tunnel segment;
step 4: polishing the shield segment in the region to be reinforced by adopting an angle grinder, exposing a fresh surface and removing surface dust, and polishing and roughening the Z-shaped steel plate by adopting the angle grinder;
step 5: coating an adhesive at the contact position of the shield segment in the region to be reinforced and the Z-shaped steel plate, and pressurizing the Z-shaped steel plate unit to ensure that the adhesive overflows from the periphery of the Z-shaped steel plate;
step 6: performing block construction according to the size of the reinforcing area, repeating the step 5, and connecting all Z-shaped steel plates into a whole;
step 7: filling filler through filling holes preset in the Z-shaped steel plate;
in the reinforcing process of the step 5 and the step 7, the falling off of the reinforcing member in the reinforcing process is avoided by additionally arranging a fixing facility, so that the construction safety in the reinforcing process is ensured, and the fixing facility is an expansion bolt or a chemical bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910446919.6A CN110259484B (en) | 2019-05-27 | 2019-05-27 | Shield tunnel reinforcing structure based on Z-shaped steel plate and construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910446919.6A CN110259484B (en) | 2019-05-27 | 2019-05-27 | Shield tunnel reinforcing structure based on Z-shaped steel plate and construction method |
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| CN110259484A CN110259484A (en) | 2019-09-20 |
| CN110259484B true CN110259484B (en) | 2023-09-26 |
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| JP2008075393A (en) * | 2006-09-22 | 2008-04-03 | Jfe Engineering Kk | Steel panel, assembly thereof, and tunnel reinforcing structure and reinforcing method using the same |
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| CN104989432A (en) * | 2015-05-29 | 2015-10-21 | 上海隧道工程有限公司 | Construction method for opening section steel grouting to reinforce tunnel |
| CN107620598A (en) * | 2017-09-01 | 2018-01-23 | 同济大学 | A kind of shield tunnel lining segment and its reinforcement means |
| CN108678775A (en) * | 2018-07-06 | 2018-10-19 | 浙江大学城市学院 | A kind of anti-horizontal ovalizing deflection shield tunnel ruggedized construction of pre-embedded steel slab and construction method |
| CN109630155A (en) * | 2019-01-24 | 2019-04-16 | 宁波用躬科技有限公司 | A kind of top-bottom cross method for tunnel construction of different section type |
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2019
- 2019-05-27 CN CN201910446919.6A patent/CN110259484B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008075393A (en) * | 2006-09-22 | 2008-04-03 | Jfe Engineering Kk | Steel panel, assembly thereof, and tunnel reinforcing structure and reinforcing method using the same |
| CN102535355A (en) * | 2012-02-21 | 2012-07-04 | 朔黄铁路发展有限责任公司 | Method for reinforcing bridge structure separated steel-concrete combined truss |
| CN104989432A (en) * | 2015-05-29 | 2015-10-21 | 上海隧道工程有限公司 | Construction method for opening section steel grouting to reinforce tunnel |
| CN107620598A (en) * | 2017-09-01 | 2018-01-23 | 同济大学 | A kind of shield tunnel lining segment and its reinforcement means |
| CN108678775A (en) * | 2018-07-06 | 2018-10-19 | 浙江大学城市学院 | A kind of anti-horizontal ovalizing deflection shield tunnel ruggedized construction of pre-embedded steel slab and construction method |
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| CN110259484A (en) | 2019-09-20 |
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