CN107091101A - Mine shield handing-over tunnel folded type joint design and construction method in the middle part of marine site - Google Patents

Mine shield handing-over tunnel folded type joint design and construction method in the middle part of marine site Download PDF

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Publication number
CN107091101A
CN107091101A CN201710189496.5A CN201710189496A CN107091101A CN 107091101 A CN107091101 A CN 107091101A CN 201710189496 A CN201710189496 A CN 201710189496A CN 107091101 A CN107091101 A CN 107091101A
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CN
China
Prior art keywords
shield
casing
section
concrete
construction
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710189496.5A
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Chinese (zh)
Inventor
贺维国
宋超业
许黎明
袁勇
毕经东
刘鹏
周建军
汤浩杰
李明君
杜宝义
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China Railway Liuyuan Group Co Ltd
Original Assignee
China Railway Liuyuan Group Co Ltd
CRTG Survey and Design Institute Co Ltd
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Filing date
Publication date
Application filed by China Railway Liuyuan Group Co Ltd, CRTG Survey and Design Institute Co Ltd filed Critical China Railway Liuyuan Group Co Ltd
Priority to CN201710189496.5A priority Critical patent/CN107091101A/en
Publication of CN107091101A publication Critical patent/CN107091101A/en
Pending legal-status Critical Current

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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
    • E21D11/10Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
    • E21D11/105Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
    • 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
    • E21D11/38Waterproofing; Heat insulating; Soundproofing; Electric insulating
    • 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 present invention relates to mine shield handing-over tunnel folded type joint design and construction method in the middle part of marine site, belong to Design of Urban Rail Transit Engineering and technical field of construction;Normal Mining Method section, shield machine receiver section, casing changeover portion, shield strengthening segment and normal shield section, which are sequentially connected to lead to, forms progressive rate joint design;The mine shield joins tunnel folded type progressive rate joint design, and using gunite concrete preliminary bracing, prefabricated reinforced concrete section of jurisdiction, casing steel plate structure, the multiple lining cutting of cast-in-place concrete and slip casting filling, repeatedly overlapping segmentation forms rigidity gradual change;Folded type joint length is long, the multiple slip casting of sandwich construction, good water-proof effect;Engineering method technique is simple and convenient to operate, and armored concrete casing and multiple tracks reinforcement structure are built using mould, and construction risk is small, and joint is safe and reliable.

Description

Mine shield handing-over tunnel folded type joint design and construction method in the middle part of marine site
Technical field
The present invention relates to mine shield handing-over tunnel folded type joint design and construction method in the middle part of marine site, belong to city rail Road traffic engineering technique of design and construction field.
Background technology
Seabed space utilization is increasingly paid attention to by the regional people of different economic conditions, has been built in the world today Many seabed tunnels, under preparation is also a lot.The conventional general preferred mining method construction of Tunnel Engineering over strait, its motor-driven spirit Living, practical experience and successful case are a lot.With the development of tunnel construction technology, because mechanization degree is high, construction risk, enter Spend and safely controllable, shield tunnel progressively turns into the recommendation engineering method for building Tunnel Engineering over strait.Engineering method selection is seabed tunnel Road is successfully crucial, typically uses different engineering methods according to local environment condition and geological conditions.
The seabed tunnel or submerged tunnel in waters are passed through, typically a kind of construction method is used in waters scope, mine is selected Method, shield method or immersed tunnelling method.Each single sandhog can be utilized by considering the combination of the construction methods such as shield method, Mining Method The advantage of method, has turned into the important means of constructing tunnel efficiency under the conditions of raising long range over strait or compound stratum at present.
Tunnel structure generally need to only carry out cross-sectional design, and this is due to most of Tunnel Engineering along line direction It is linear and basically identical along vertical structure rigidity, thus is considered as plane strain problems and carries out calculating design.And for Tunnel over strait uses the section that shield is connected with mine, and Mining Method typically uses composite lining, and preliminary bracing is mixed for injection Xtah Crude Clay structure, secondary lining is monolithic reinforced concrete structure, and the rigidity of structure is big;The generally circular in cross section individual layer section of jurisdiction knot of shield method Structure, structural thickness is relatively thin and is assembled formation, and the rigidity of structure is smaller.Both joint stiffness variations are larger, rigidity of structure change Section is typical three-dimensional structural analysis problem, is the weak link of engineering design, the crucial control as limit structural safety Point processed.Especially the rigidity of structure changes the anti-seismic performance of section, and docking rigidity in tunnel is excessive, can produce stress raisers, threatens Structure safety;Dock rigidity too small, excessive deformation occurs, be unfavorable for structurally waterproof and normally use.Therefore, over straitly Iron tunnel Mining Method and shield method docking are by as the safe key factor of engineering constraint structure
China also publishes《Urban track traffic seismic design of structures specification》, these work are development subway station and tunnel Road seismic design of structures is laid a good foundation, but these specifications are not designed for subway tunnel engineering method over strait docking stiffness variation section Treatment measures.
Current Mining Method and shield method banjo fixing butt jointing linked vector graph typically have two kinds.One kind is Tunneling by mining method and shield method Vertical shaft transition is set at tunnel, but two kinds of tunnel engineering method tie point is located in the middle part of marine site, if needing to fill out sea in marine setting vertical shaft Construction man-made island, it is substantially infeasible.Another is usually first to receive cavern with one expansion of mining method construction in seabed, in cavern Headwall on punch and be connected with shield tunnel, junction sets the closure of portal collar tie beam, such a two kinds of structures of method docking location Stiffness variation is big, unfavorable to antidetonation, while it is high to set large-scale reception cavern and sky to push away shield-tunneling construction risk in marine site, in addition waterproof Poor performance, groundwater treatment are simple, if once underground water closure in marine site is made a fault, it may occur that water burst causes catastrophic failure.
As can be seen from the above analysis, general to use shield method and mining method construction submerged tunnel, its jointing is deposited Stiffness variation is big, poor seismic behavior, waterproof effect difference and the distinct disadvantage such as construction risk is big.
The content of the invention
In view of the defects and deficiencies of the prior art, the present invention intends to provide a kind of simple in construction, structure reasonable stress, Mine shield handing-over tunnel folded type joint design and construction method in the middle part of the marine site of convenient and quick construction.
To achieve the above object, the technical solution adopted by the present invention is:Mine shield handing-over tunnel folded type in the middle part of marine site Joint design includes normal Mining Method section, shield machine receiver section, casing changeover portion, shield strengthening segment and normal shield section, described Normal Mining Method section, shield machine receiver section, casing changeover portion, shield strengthening segment and normal shield section, which are sequentially connected to lead to, forms gradual change Rigidity joint design;The mine shield joins tunnel folded type progressive rate joint design, using gunite concrete branch at initial stage Repeatedly overlapping is segmented shape for shield, prefabricated reinforced concrete section of jurisdiction, casing steel plate structure, the multiple lining cutting of cast-in-place concrete and slip casting filling Into rigidity gradual change, it is ensured that waterproof is firm and stress performance is good.
Preferably, the normal Mining Method section includes advance support, preliminary bracing, flexible waterproof layer and secondary lining, The flexible waterproof layer of insertion, the initial stage are provided between the normal Mining Method section secondary liner structure and preliminary bracing structure Supporting construction is made up of grid steel frame, bar-mat reinforcement and gunite concrete, and the secondary liner structure is reinforced concrete structure.
Preferably, the shield machine receiver section includes tunneling advance support, preliminary bracing structure, flexible waterproof layer, mould Casing, beans gravel concrete backfill layer, shield casing steel plate and moulded lining structure are built, the receiver section advance support structure is set The top of tunnel excavation profile is placed in, the receiver section preliminary bracing structure setting is described soft in the outer rim of tunnel excavation profile Property waterproof layer be arranged at the receiver section preliminary bracing structure and its internal described mould is built between casing, the mould, which is built in casing, to be stayed Provided with the shield casing steel plate, beans gravel concrete backfill layer is filled in mould and builds casing, folded by shield casing steel plate Between space, the moulded lining structure is closely set in the inside of the shield casing steel plate.
Preferably, in the shield machine receiver section, just branch structure and body structure are disconnected using the shape of a hoof for the receiver section Face, body structure inner edge at least 150mm bigger than shield machine outline;The mould builds casing for reinforced concrete structure, and initial stage is Closed box structure, shield machine abolishes two ends headwall after reaching reception.The shield casing steel plate is the shield machine after receiving Shell, is embedded within follow-up moulded lining structure.The moulded lining structure is reinforced concrete structure, is annular knot Structure.
Preferably, using the connection of plug wall, plug wall between the shield machine receiver section and the normal Mining Method section Using reinforced concrete structure.
Preferably, the casing changeover portion include advance support, preliminary bracing structure, flexible waterproof layer, mould build casing, Beans gravel concrete packed layer, shield duct piece and transition moulded lining structure, the changeover portion advance support structure setting is in tunnel The top of road outline excavation, the changeover portion preliminary bracing structure setting is in the outer rim of tunnel excavation profile, the flexible water Layer is arranged at the changeover portion preliminary bracing structure and its internal described mould is built between casing, and the mould, which is built in casing, to be installed State shield duct piece, the beans gravel concrete backfill layer is filled in mould and built between casing, the space folded by shield duct piece, the mistake Cross the inside that moulded lining structure is closely set in the shield duct piece.
Preferably, in the casing changeover portion, shield duct piece is prefabricated reinforced concrete structure, is entered during shield machine construction Assembled install of row forms circular cross section.The transition moulded lining structure is reinforced concrete structure, its thickness and shield duct piece Thickness sum is suitable with the moulded lining structural thickness in the shield machine receiver section;The casing changeover portion and the shield machine Using collar tie beam connection is strengthened between receiver section, strengthen collar tie beam profile height cover beans gravel-pack in the casing changeover portion, Shield duct piece and transition moulded lining structure, build body structure closely connected with the mould.
Preferably, the shield strengthening segment includes shield duct piece and strengthens moulded lining structure, the reinforcement mould builds lining The inside that structure is closely set in shield duct piece is built, is connected with casing changeover portion smooth-going.The shield strengthens segment length not Shield external diameter less than 1.5 times.
Preferably, knot is closed in each stacking of the shield machine receiver section, the casing changeover portion and the shield strengthening segment Pre-buried slip casting steel pipe measure is taken between structure, strengthens slip casting filling, it is ensured that with reference to closely knit reliable.
Preferably, tunnel segment structure of the normal shield section for shield machine construction formation, with the shield strengthening segment Tunnel segment structure smooth-going connection.
Mine shield joins the construction method of tunnel folded type joint design in the middle part of marine site, comprises the steps of:
A, by design drawing unwrapping wire position, preset mine shield interface point position;
B, the boring construction for carrying out normal Mining Method section, using u-shaped cross-section, construction is excavated using benching tunnelling method, geology bar Part is poor or monitors setting one of interim inverted arch in middle part when needing, and normal Mining Method Duan Chuzhi structure constructions are mainly comprised the following steps:It is super Preceding supporting ductule or anchor pole and slip casting;Excavate, the Pin bracing members spacing of drilling depth one;First pneumatically placed concrete, hangs bar-mat reinforcement, erects steel branch Support, gunite concrete;Preliminary bracing back-grouting;Carry out next step circulation;
C, the boring construction for carrying out shield machine receiver section and casing changeover portion, construction use benching tunnelling method, first branch structure construction Step is with normal Mining Method section;
When d, casing Construction of Transition Section are to termination, termination is blocked using gunite concrete, waterproof layer is laid, constructed Mould builds body structure, and using cast-in-situ steel reinforced concrete formation closed circle casing, shield machine is abolished position and poured using plain concrete Build;
The normal shield section of e, shield machine construction, assembled shield duct piece lining cutting is strengthened synchronous grouting and carried out secondary and multiple Slip casting, it is ensured that section of jurisdiction is closely connected with country rock behind;
F, cutter head of shield machine abolish form concrete body structure headwall, driving to casing front end headwall location, assembled shield Structure strengthening segment shield duct piece, strengthens section of jurisdiction back-grouting;
G, cut mould and build casing headwall, disassemble shield machine, shield casing steel plate is retained in hole;
H, the space to changeover portion pipe-plate lining and shield casing steel plate behind are filled using beans gravel concrete, are filled out Slip casting densification is carried out using cement single slurry again after filling;
I, segmentation pour each section of moulded lining structure, forward connect into integral joint.
After said structure, the present invention has the beneficial effect that:Mine shield handing-over tunnel in the middle part of marine site of the present invention Folded type joint design and construction method realize shield tunnel with Tunneling by mining method in the connection in marine site, have expanded seabed tunnel Pipeline construction method pattern;Structural support system is simple, with reference to shield and two kinds of mine construction technology step-by-step arrangement jointing, phase Directly strengthen collar tie beam by portal for traditional shield mine to connect, interface point stiffness variation, knot are adjusted by sandwich construction Structure stress performance and anti-seismic performance are good;Strengthening collar tie beam junction setting sealing adhesive tape mode relative to traditional, folded type connects Head length is long, the multiple slip casting of sandwich construction, good water-proof effect;Engineering method technique is simple and convenient to operate, and armored concrete is built using mould Casing and multiple tracks reinforcement structure, construction risk are small, and joint is safe and reliable.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also To obtain other accompanying drawings according to these accompanying drawings.
Fig. 1 is longitudinally arranged schematic diagram for the structure of the present invention;
Fig. 2 arranges schematic diagram for the structural plan of the present invention;
Fig. 3 is normal Mining Method section sectional schematic diagram of the invention;
Fig. 4 is shield machine receiver section sectional schematic diagram of the invention;
Fig. 5 is casing changeover portion sectional schematic diagram of the invention;
Fig. 6 is shield strengthening segment sectional schematic diagram of the invention;
Fig. 7 is normal shield section sectional schematic diagram of the invention;
Fig. 8 forms schematic diagram for the Mining Method section preliminary bracing structure construction of the present invention;
Fig. 9 builds body structure for the mould of the present invention and constructs to form schematic diagram;
Figure 10 enters schematic diagram of being constructed after casing is received for the shield of the present invention;
Figure 11 is the Mining Method of the present invention and the final lining construction schematic diagram of shield method joint design.
Description of reference numerals:
The normal Mining Method sections of 1-, 2- shield machine receiver sections, 3- casing changeover portions, 4- shield strengthening segments, the normal shield sections of 5-, 6- advance supports, 7- preliminary bracings, 8- flexible waterproof layers, 9- secondary linings, 10- tunneling advance supports, 11- tunneling branch at initial stage Shield, 12- tunneling flexible waterproof layers, 13- moulds build casing, 14- receiver section beans gravel concrete backfill layer, 15- shield casing steel plates, 16- receiver section moulded linings, 17- plug wall constructions, 18- changeover portion beans gravel concrete backfill layer, 19- changeover portion shield pipes Piece, 20- transition moulded lining structures, 21- stiffening ring girder constructions, 22- strengthening segment shield duct pieces, 23- strengthens moulded lining structure, The normal shield duct piece structures of 24-.
Embodiment
The present invention is further illustrated below in conjunction with the accompanying drawings.
Referring to such as Fig. 1 -- shown in Figure 11, mine shield handing-over tunnel folded type connects in the middle part of the marine site of present embodiment Header structure includes normal Mining Method section 1, shield machine receiver section 2, casing changeover portion 3, shield strengthening segment 4 and normal shield section 5, just Normal Mining Method section 1, shield machine receiver section 2, casing changeover portion 3, shield strengthening segment 4 and normal shield section 5 are sequentially connected logical formation Progressive rate joint design;Mine shield handing-over tunnel folded type progressive rate joint design, using gunite concrete branch at initial stage Repeatedly overlapping is segmented shape for shield, prefabricated reinforced concrete section of jurisdiction, casing steel plate structure, the multiple lining cutting of cast-in-place concrete and slip casting filling Into rigidity gradual change, it is ensured that waterproof is firm and stress performance is good.
Wherein, normal Mining Method section 1 includes advance support 6, preliminary bracing 7, flexible waterproof layer 8 and secondary lining 9, normally The flexible waterproof layer 8 of insertion, preliminary bracing structure 7 are provided between the secondary liner structure 9 of Mining Method section 1 and preliminary bracing 7 It is made up of grid steel frame, bar-mat reinforcement and gunite concrete, structural thickness 200-300mm;Secondary lining 9 is armored concrete knot Structure, structural thickness 400-600mm;Shield machine receiver section 2 includes tunneling advance support 10, preliminary bracing structure 11, flexible water Layer 12, mould build casing 13, beans gravel concrete backfill layer 14, shield casing steel plate 15 and moulded lining 16, and receiver section is propped up in advance Protection structure 10 is arranged at the top of tunnel excavation profile, and receiver section preliminary bracing structure 11 is arranged at the outer of tunnel excavation profile Edge, flexible waterproof layer 12 is arranged at receiver section preliminary bracing structure 11 and its internal mode is built between casing 13, and mould is built in casing and stayed Provided with shield casing steel plate 15, beans gravel concrete backfill layer 14 is filled in mould and builds casing 13, folded by shield casing steel plate 15 Between space, moulded lining structure 16 is closely set in the inside of shield casing steel plate 15;In shield machine receiver section 2, receiver section First branch structure 11 and body structure 13 use u-shaped cross-section, the inner edge of body structure 13 160mm bigger than shield machine outline.Mould is built Casing 13 is reinforced concrete structure, and thickness is 300mm, and initial stage is closed box structure, and shield machine abolishes two after reaching reception Hold headwall.Shield casing steel plate 15 is the shell of the shield machine after receiving, and is embedded within follow-up moulded lining structure 16.Mould is built Liner structure 16 is reinforced concrete structure, and cirque structure, thickness is 500-600mm;Shield machine receiver section 2 and normal mine Connected between method section 1 using plug wall 17, plug wall 17 uses reinforced concrete structure;It is advanced that casing changeover portion 3 includes tunneling Supporting 10, preliminary bracing structure 11, flexible waterproof layer 12, mould build casing 13, beans gravel concrete packed layer 18, shield duct piece 19 With transition moulded lining structure 20, changeover portion advance support structure 10 is arranged at the top of tunnel excavation profile, changeover portion initial stage Supporting construction 11 is arranged at the outer rim of tunnel excavation profile, and flexible waterproof layer 12 is arranged at changeover portion preliminary bracing structure 11 and its Internal mode is built between casing 13, and mould is built and shield duct piece 19 is installed in casing 13, and beans gravel concrete backfill layer 18 is filled in mould Build between casing 13, the space folded by shield duct piece 19, transition moulded lining structure 20 is closely set in the interior of shield duct piece 19 Portion;In casing changeover portion 3, shield duct piece 19 is prefabricated reinforced concrete structure, and assembled install is carried out during shield machine construction and is formed Circular cross section, thickness 350mm.Transition moulded lining structure 20 is reinforced concrete structure, thickness 250mm;Casing changeover portion 3 with Connected between shield machine receiver section 2 using reinforcement collar tie beam 21, strengthen 3 beans gravels in the profile height of collar tie beam 21 covering casing changeover portion Packed layer 18, shield duct piece 19 and transition moulded lining structure 20, are highly 800-900mm, and it is closely connected to build the structure of casing 13 with mould.
Shield strengthening segment 4 includes shield duct piece 22 and strengthens moulded lining structure 23, strengthens moulded lining structure 23 and is close to The inside of shield duct piece 22 is arranged at, is connected with the smooth-going of casing changeover portion 3;Shield machine receiver section 2, casing changeover portion 3 and shield Pre-buried slip casting steel pipe measure is taken between each layer iterative structure of strengthening segment 4, strengthens slip casting filling, it is ensured that with reference to closely knit reliable; Normal shield section 5 is the tunnel segment structure 24 of shield machine construction formation, is connected with the smooth-going of tunnel segment structure 22 of shield strengthening segment 4;Just Normal Mining Method section 1, shield machine receiver section 2, casing changeover portion 3, shield strengthening segment 4 and normal shield section 5 are sequentially communicated.
Mine shield handing-over tunnel folded type progressive rate joint design is applied to submarine metro in the middle part of the marine site of the present invention The embodiment of running tunnel construction, concrete operation step is as follows:
A, by design drawing unwrapping wire position, preset mine shield interface point position;
B, the boring construction for carrying out normal Mining Method section 1, using u-shaped cross-section, section width 7.8m, height 8.5m are applied Work is excavated using benching tunnelling method, and geological conditions is poor or monitors when needing at the beginning of one of interim inverted arch of middle part setting, normal Mining Method section The construction of branch structure 7 is mainly comprised the following steps:Advance support ductule or anchor pole and slip casting;Excavate, the Pin bracing members spacing of drilling depth one;Just spray Concrete, hangs bar-mat reinforcement, erects bracing members, gunite concrete;Preliminary bracing back-grouting;Carry out next step circulation;
C, the boring construction for carrying out shield machine receiver section 2 and casing changeover portion 3, using similar round section, excavation width 8.5m, height 8.5m, construction use benching tunnelling method.Advance support 10 uses diameter 32mm grouting with small pipe or diameter 25mm anchor poles, Grouting serous fluid uses cement single slurry;Preliminary bracing 11 is that grid steel frame adds gunite concrete, thickness 250mm;
The common long 20m of d, casing changeover portion 3, it is ensured that shield function fully enters casing.When constructing to termination, termination is used 150mm thickness gunite concretes are blocked, and lay flexible waterproof layer 12, assembling reinforcement and set up template scaffold, and mould of constructing is built Body structure 13, using cast-in-situ steel reinforced concrete formation closed circle casing, thickness 250mm, headwall shield machine is abolished position and adopted Poured with plain concrete;
The normal shield section 5 of e, shield machine construction, assembled shield duct piece lining cutting 24, section of jurisdiction internal diameter 5.5m, external diameter 6.2m, section of jurisdiction Thickness 350mm, strengthens synchronous grouting and carries out secondary and multiple slip casting, it is ensured that section of jurisdiction is closely connected with country rock behind;
F, to normal shield section 5 in the range of the back-grouting of pipe-plate lining 24 check, it is ensured that block underground water effect Afterwards, cutter head of shield machine abolishes the headwall of form concrete body structure 13, continues to tunnel to casing front end headwall location, assembled shield The shield duct piece 22 of structure strengthening segment 4, shield duct piece 22 is strengthened simultaneously using cage bar diameter 25mm reinforcement section of jurisdiction, thickness 350mm Section of jurisdiction back-grouting;
G, the front end headwall that mould builds casing 13 is cut, disassemble shield machine, internal each type device interval is transported by what is be completed Appear outer, shield casing steel plate 15 is retained in hole;
H, the space to changeover portion pipe-plate lining 19 and the behind of shield casing steel plate 15 use beans gravel concrete 18 and 14 It is filled, slip casting densification is carried out using cement single slurry again after filling;
I, segmentation pour each section of moulded lining structure, forward connect into integral joint.First construct normal Mining Method section 1 and shield Reinforced concrete lining layer 9 and 16 in the range of structure machine receiver section 2, while pouring the plug wall construction 17 of connection;Form removal is followed by The moulded lining 20 and 23 of construction casing changeover portion 3 and shield strengthening segment 4, armored concrete, thickness are built using formwork jumbo mould 250mm, the length of strengthening segment moulded lining 23 is 10m;
J, while serving as a contrast arch built-in slip casting pipe in each segmentation moulded lining structure two, carry out two backing grouting behind shaft or drift lining, it is ensured that two Fill closely knit after backing, so far form handing-over tunnel folded type progressive rate joint design.
Structure and construction method of the present invention were applied to rocky stratum tunneling Mining Method and shield tunnel junction between sea area Joint construction.Excavation drilling depth should be strictly controlled to be not more than 1 Pin grid steel frame spacing during tunneling Mining Method section excavation construction, in time Closing cyclization;The length of bench for often walking excavation of Mining Method section is about 3~5m, when the upper strata excavation intermittent time is longer, using 5cm Thick gunite concrete closes face;Rocky stratum takes weak blast when constructing, interim inverted arch can be set when constructing in soft stratum Control deformation;Strengthen tunnel deformation monitoring simultaneously.
It is described above, it is merely illustrative of the technical solution of the present invention and unrestricted, those of ordinary skill in the art are to this hair Other modifications or equivalent substitution that bright technical scheme is made, without departing from the spirit and scope of technical solution of the present invention, It all should cover among scope of the presently claimed invention.

Claims (11)

1. mine shield handing-over tunnel folded type joint design in the middle part of marine site, it is characterised in that:It includes normal Mining Method section, shield Structure machine receiver section, casing changeover portion, shield strengthening segment and normal shield section, the normal Mining Method section, shield machine receiver section, case Body changeover portion, shield strengthening segment and normal shield section, which are sequentially connected to lead to, forms progressive rate joint design;The mine shield is handed over Tunnel folded type progressive rate joint design is connect, using gunite concrete preliminary bracing, prefabricated reinforced concrete section of jurisdiction, casing steel Repeatedly overlapping segmentation forms rigidity gradual change for hardened structure, the multiple lining cutting of cast-in-place concrete and slip casting filling.
2. mine shield handing-over tunnel folded type joint design in the middle part of marine site according to claim 1, it is characterised in that:Institute Stating normal Mining Method section includes advance support, preliminary bracing, flexible waterproof layer and secondary lining, and the normal Mining Method section is secondary Be provided with the flexible waterproof layer of insertion between liner structure and preliminary bracing structure, the preliminary bracing structure by grid steel frame, Bar-mat reinforcement and gunite concrete composition, the secondary liner structure is reinforced concrete structure.
3. mine shield handing-over tunnel folded type joint design in the middle part of marine site according to claim 1, it is characterised in that:Institute State shield machine receiver section and build casing, beans gravel concrete including tunneling advance support, preliminary bracing structure, flexible waterproof layer, mould Layer, shield casing steel plate and moulded lining structure are backfilled, the receiver section advance support structure setting is in tunnel excavation profile Top, the receiver section preliminary bracing structure setting is in the outer rim of tunnel excavation profile, and the flexible waterproof layer is arranged at described Receiver section preliminary bracing structure and its internal described mould are built between casing, and the mould, which is built, is installed with the shield casing steel in casing Plate, beans gravel concrete backfill layer is filled in mould and built between casing, the space folded by shield casing steel plate, and the mould builds lining Build the inside that structure is closely set in the shield casing steel plate.
4. mine shield handing-over tunnel folded type joint design in the middle part of marine site according to claim 1, it is characterised in that:Institute State in shield machine receiver section, just branch structure and body structure use u-shaped cross-section to receiver section, and shield machine is compared in body structure inner edge The big at least 150mm of outline;The mould builds casing for reinforced concrete structure, and initial stage is closed box structure, and shield machine is reached Two ends headwall is abolished after reception;The shield casing steel plate is the shell of the shield machine after receiving, and is embedded in follow-up moulded lining Within structure;The moulded lining structure is reinforced concrete structure, is cirque structure.
5. mine shield handing-over tunnel folded type joint design in the middle part of marine site according to claim 1, it is characterised in that:Institute State and reinforced concrete structure is used using the connection of plug wall, plug wall between shield machine receiver section and the normal Mining Method section.
6. mine shield handing-over tunnel folded type joint design in the middle part of marine site according to claim 1, it is characterised in that:Institute State casing changeover portion including advance support, preliminary bracing structure, flexible waterproof layer, mould build casing, beans gravel concrete packed layer, Shield duct piece and transition moulded lining structure, the changeover portion advance support structure setting is in the top of tunnel excavation profile, institute Changeover portion preliminary bracing structure setting is stated in the outer rim of tunnel excavation profile, at the beginning of the flexible waterproof layer is arranged at the changeover portion Phase supporting construction and its internal described mould are built between casing, and the mould is built and the shield duct piece is installed in casing, the beans gravel Stone concrete backfill layer is filled in mould and built between casing, the space folded by shield duct piece, and the transition moulded lining structure is close to It is arranged at the inside of the shield duct piece.
7. mine shield handing-over tunnel folded type joint design in the middle part of marine site according to claim 1, it is characterised in that:Institute State in casing changeover portion, shield duct piece is prefabricated reinforced concrete structure, assembled install is carried out during shield machine construction and forms circular Section.The transition moulded lining structure is reinforced concrete structure, its thickness and shield duct piece thickness sum and the shield Moulded lining structural thickness in machine receiver section is suitable;Using reinforcement between the casing changeover portion and the shield machine receiver section Collar tie beam is connected, and is strengthened beans gravel-pack, shield duct piece and stage die in the collar tie beam profile height covering casing changeover portion and is built Liner structure, builds body structure closely connected with the mould.
8. mine shield handing-over tunnel folded type joint design in the middle part of marine site according to claim 1, it is characterised in that:Institute Shield strengthening segment is stated including shield duct piece and strengthens moulded lining structure, the reinforcement moulded lining structure is closely set in shield The inside of section of jurisdiction, is connected with casing changeover portion smooth-going;The shield strengthens the shield external diameter that segment length is not less than 1.5 times.
9. mine shield handing-over tunnel folded type joint design in the middle part of marine site according to claim 1, it is characterised in that:Institute Pre-buried slip casting steel is taken between each layer iterative structure for stating shield machine receiver section, the casing changeover portion and the shield strengthening segment Pipe measure, strengthens slip casting filling.
10. mine shield handing-over tunnel folded type joint design in the middle part of marine site according to claim 1, it is characterised in that: The normal shield section is the tunnel segment structure of shield machine construction formation, is connected with the tunnel segment structure smooth-going of the shield strengthening segment.
11. mine shield joins the construction method of tunnel folded type joint design in the middle part of marine site, it is characterised in that:It is comprising following Step:
(a), positioned by design drawing unwrapping wire, preset mine shield interface point position;
(b) boring construction of normal Mining Method section, is carried out, using u-shaped cross-section, construction is excavated using benching tunnelling method, geological conditions Middle part sets interim inverted arch together when poor or monitoring needs, and normal Mining Method Duan Chuzhi structure constructions are mainly comprised the following steps:In advance Supporting ductule or anchor pole and slip casting;Excavate, the Pin bracing members spacing of drilling depth one;First pneumatically placed concrete, hangs bar-mat reinforcement, erects steel branch Support, gunite concrete;Preliminary bracing back-grouting;Carry out next step circulation;
(c) boring construction of shield machine receiver section and casing changeover portion, is carried out, construction uses benching tunnelling method, first branch structure construction step Suddenly with normal Mining Method section;
(d) when, casing Construction of Transition Section is to termination, termination is blocked using gunite concrete, waterproof layer is laid, mould of constructing Body structure is built, using cast-in-situ steel reinforced concrete formation closed circle casing, shield machine is abolished position and poured using plain concrete;
(e), the normal shield section of shield machine construction, assembled shield duct piece lining cutting, strengthen synchronous grouting and carry out secondary and multiple note Slurry, it is ensured that section of jurisdiction is closely connected with country rock behind;
(f), cutter head of shield machine abolishes form concrete body structure headwall, driving to casing front end headwall location, assembled shield Strengthening segment shield duct piece, strengthens section of jurisdiction back-grouting;
(g), cut mould and build casing headwall, disassemble shield machine, shield casing steel plate is retained in hole;
(h), the space of changeover portion pipe-plate lining and shield casing steel plate behind is filled using beans gravel concrete, filled Slip casting densification is carried out using cement single slurry again afterwards;
(i), segmentation pours each section of moulded lining structure, forward connects into integral joint.
CN201710189496.5A 2017-03-27 2017-03-27 Mine shield handing-over tunnel folded type joint design and construction method in the middle part of marine site Pending CN107091101A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108915702A (en) * 2018-06-12 2018-11-30 中铁二十局集团轨道交通工程有限公司 It is a kind of circle narrow-bore tunnel in shield method of reseptance
CN109944600A (en) * 2019-04-10 2019-06-28 中铁十二局集团有限公司 Shield receiving end reinforced construction method
CN110985025A (en) * 2019-12-16 2020-04-10 中铁一局集团有限公司 Method for reconstructing shield tunnel to carry out mine construction
CN113266396A (en) * 2021-07-01 2021-08-17 上海市城市建设设计研究总院(集团)有限公司 Shield tunnel segment deformation joint with self-adaptive deformation at movable fault zone

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108915702A (en) * 2018-06-12 2018-11-30 中铁二十局集团轨道交通工程有限公司 It is a kind of circle narrow-bore tunnel in shield method of reseptance
CN108915702B (en) * 2018-06-12 2020-09-22 中铁二十一局集团轨道交通工程有限公司 Shield receiving method in circular small-section tunnel
CN109944600A (en) * 2019-04-10 2019-06-28 中铁十二局集团有限公司 Shield receiving end reinforced construction method
CN110985025A (en) * 2019-12-16 2020-04-10 中铁一局集团有限公司 Method for reconstructing shield tunnel to carry out mine construction
CN113266396A (en) * 2021-07-01 2021-08-17 上海市城市建设设计研究总院(集团)有限公司 Shield tunnel segment deformation joint with self-adaptive deformation at movable fault zone

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