CN106522989B - The method of ventilating shaft structure and shield driving parallel construction - Google Patents
The method of ventilating shaft structure and shield driving parallel construction Download PDFInfo
- Publication number
- CN106522989B CN106522989B CN201610822445.7A CN201610822445A CN106522989B CN 106522989 B CN106522989 B CN 106522989B CN 201610822445 A CN201610822445 A CN 201610822445A CN 106522989 B CN106522989 B CN 106522989B
- Authority
- CN
- China
- Prior art keywords
- ventilating shaft
- shield
- foundation pit
- backfill
- construction
- Prior art date
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- 239000003795 chemical substances by application Substances 0.000 claims description 4
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- 239000004568 cements Substances 0.000 claims description 3
- 230000003014 reinforcing Effects 0.000 claims description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N Sodium silicate Chemical compound 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- 239000002184 metals Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reactions Methods 0.000 description 1
Classifications
-
- 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
- E21D11/10—Lining 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
- E21D11/105—Transport 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
-
- 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
- E21D5/00—Lining shafts; Linings therefor
- E21D5/04—Lining shafts; Linings therefor with brick, concrete, stone, or similar building materials
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/0607—Making 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
Description
Technical field
The present invention relates to shield-tunneling construction fields.It is more particularly related to which a kind of ventilating shaft structure and shield driving are flat The method of row construction.
Background technique
It builds and rapidly develops with urban rail transit in China, shield method becomes the main engineering method of constructing metro tunnel.Shield Setting ventilating shaft is generally required in tunnel piercing section, causes to be generally required when Shield Construction Method Used through intermediate ventilating shaft.Shield is normal It is " tunnel after first standing " that rule, which pass through intermediate ventilating shaft method, which is to apply portal after the completion of ventilating shaft main structure construction and held Head reinforce after receive shield machine and it is secondary in intermediate ventilating shaft originate, or using " standing after first tunnel " engineering method complete in advance shield pick Intermediate ventilating shaft is applied after into construction.Conventional method requires intermediate ventilating shaft to complete to be laid with guide rail after receiving portal and end reinforcing and digs Except portal is secondary originate after can just continue shield-tunneling construction, the shield driving duration may be influenced；" standing after first tunnel " method can have Effect shortens the construction period, but in rich water sandy gravel stratum after apply intermediate ventilating shaft there are larger leakage and risk of gushing, need to take it is complicated plus Gu and applying stability when ventilating shaft main structure is applied after dewatering measure guarantee.
Summary of the invention
It is an object of the invention to solve at least the above problems, and provide the advantages of at least will be described later.
It is a still further object of the present invention to provide a kind of shield machines to pass through earlier construction wind under external and internal pressure equilibrium state Well building enclosure, the method for reaching ventilating shaft structure and shield driving parallel construction.
In order to realize these purposes and other advantages according to the present invention, provides a kind of ventilating shaft structure and shield driving is flat The method of row construction, comprising the following steps:
S1, ventilating shaft foundation pit are supported when digging to substrate, and construction side wall is located at lowest level and supports part below and bottom plate, The height that boundary zone and embedded backfill material are supported to lowest level is laid on side wall；
S2, the template removed lowest level support and design the plate in laying in ventilating shaft foundation pit according to shield tunnel, are buried back Filler to the middle plate template and backfill material on be laid with boundary zone；
S3, it is bottom-up successively pour the rest part of side wall in ventilating shaft foundation pit, support and middle plate, into ventilating shaft foundation pit Recharge water guarantees Water And Earth Pressures balance inside and outside ventilating shaft foundation pit；And
S4, shield machine pass through after ventilating shaft foundation pit the recharge water extracted in foundation pit by backfill material driving and assembled shield duct piece, Backfill material and shield duct piece are removed, portal and ventilating shaft remaining structure are finally applied.
Preferably, the step S1 is further comprising the steps of:
Digging to being arranged two rows of central posts after substrate in the middle part of ventilating shaft foundation pit, the outer boundary of central post described in any side and The spacing of the inner boundary of the side wall ipsilateral with it meets the digging of shield machine by space, is arranged outside the ventilating shaft foundation pit U-shaped Ground-connecting-wall and dewatering well；
Wherein, the boundary zone is asphalt felt.
Preferably, the backfill material includes positioned at the M5 mortar of two rows of neutral intercolumniations and positioned at any side central post Plastic concrete between outer boundary and the inner boundary of the side wall ipsilateral with it.
Preferably, when 5 rings are tunneled with 2 rings in ventilating shaft foundation pit outside U-shaped ground-connecting-wall, increase is synchronous in the step S4 The fill factor of slip casting, simultaneous grouting slurry mix micro-expanding agent；2 rings are every in 4 rings outside the U-shaped ground-connecting-wall of ventilating shaft and ventilating shaft Ring all carries out secondary grouting, and grouting sequence is from bottom to up, carries out slip casting from right to left；Cement slurry and water are injected when secondary grouting The double paddle liquid of glass metal.
Preferably, the section of jurisdiction of the close portal position of ventilating shaft foundation pit is supplemented after shield machine passes through in the step S4 Grouting and reinforcing.
Preferably, the construction that recharge water in ventilating shaft is extracted in the step S4 is to operate stage by stage, monitors and records foundation pit Recharge water level in inside and outside land movement situation control ventilating shaft cuts backfill material and true from ventilating shaft main structure both ends after the completion of drawing water Water leakage situation is controllable in guarantor tunnel, and supplement slip casting is carried out if uncontrollable.
Preferably, before step S4 shield duct piece in ventilating shaft foundation pit the small-sized crusher in reservation tear down section of jurisdiction lifting space, Crusher is transported to after dismounting at least two endless tube pieces and completes the broken of remaining section of jurisdiction in tunnel and hangs out.
The present invention is include at least the following beneficial effects:
1, ventilating shaft bottom plate and side wall backfill plastotype concrete and sand and asphalt felt as boundary zone and is rationally set together with being laid with Set shield driving route, solve " standing after first tunnel " method need to adjust shield machine continuously tunnel route and get around central post technology it is difficult Topic, the bottom steel for reducing side wall angle fall to support；Backfill after the completion of add one of asphalt felt be isolated and constructs in plate when be not necessarily to set up Scaffold and laying bottom template.Determine suitable backfill material matching parameter, rear intermediate ventilating shaft of constructing can quickly cut completion Subsequent construction realizes shield complete machine quickly through the parallel construction with intermediate ventilating shaft main structure.
2, using a variety of slip casting measures and design reasonable grouting sequence, slip casting position and slurry material match, mix swollen Change machine enhances slurry dilatancy effect and rapid hardening, and intermediate ventilating shaft portal of constructing after solution " standing after first tunnel " method is anti-with tunnel shaft interface Water problems realizes intermediate ventilating shaft residue main body construction and shield driving parallel operations.
3, it hangs out after removing section of jurisdiction with small-sized crusher and applies portal again, change traditional shield machine and shut down and wait paving In rail, ventilating shaft be arranged steel jacket box, originate the series of measures such as bracket receive and it is secondary originate the situation missed the stop, effectively shorten shield Tunnel the duration, simplified and originated and receives portal external end head plain concrete wall and three axes agitating pile reinforcement process, saving engineering at This.
In short, missing the stop the method with intermediate ventilating shaft parallel construction using shield driving of the present invention, solves centre Ventilating shaft construction speed lag can not provide the technical problem of shield acceptable conditions on time, invented shield miss the stop it is flat with intermediate ventilating shaft The new process of row construction, has optimized portal end reinforcement measure in ventilating shaft, realizes shield and misses the stop and originates without secondary, letter Construction technology is changed, reduce construction cost and has effectively shortened the duration, has filled up the direct digging of shield machine and missed the stop and ventilating shaft The technological gap of main structure parallel construction, with good economic efficiency and social benefit, this method is especially suitable for tunnel Shield passes through intermediate ventilating shaft excavation work when the larger end consolidation effect of buried depth is difficult to ensure.
Further advantage, target and feature of the invention will be partially reflected by the following instructions, and part will also be by this The research and practice of invention and be understood by the person skilled in the art.
Detailed description of the invention
Fig. 1 is that shield of the present invention continuously tunnels process flow frame by intermediate ventilating shaft and ventilating shaft parallelism structural construction method Frame.
Fig. 2 is that shield continuously tunnels the diagrammatic cross-section missed the stop with ventilating shaft main structure body parallel construction.
Fig. 3 is the plan view of Fig. 2.
Specific embodiment
Present invention will be described in further detail below with reference to the accompanying drawings, to enable those skilled in the art referring to specification text Word can be implemented accordingly.
It should be noted that experimental method described in following embodiments is unless otherwise specified conventional method, institute Reagent and material are stated, unless otherwise specified, is commercially obtained；In the description of the present invention, term " transverse direction ", " vertical To ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", the instructions such as "outside" side Position or positional relationship are to be based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description of the present invention and simplification of the description, It is not that the device of indication or suggestion meaning or element must have a particular orientation, be constructed and operated in a specific orientation, because This is not considered as limiting the invention.
As shown in Figure 1, the present invention provides the method for a kind of ventilating shaft structure and shield driving parallel construction, including following step It is rapid:
S1, ventilating shaft foundation pit are supported when digging to substrate, and construction side wall is located at lowest level and supports part below and bottom plate, The height that boundary zone and embedded backfill material are supported to lowest level is laid on side wall；
S2, the template removed lowest level support and design the plate in laying in ventilating shaft foundation pit according to shield tunnel, are buried back Filler to the middle plate template and backfill material on be laid with boundary zone；
S3, it is bottom-up successively pour the rest part of side wall in ventilating shaft foundation pit, support and middle plate, into ventilating shaft foundation pit Recharge water guarantees Water And Earth Pressures balance inside and outside ventilating shaft foundation pit；And
S4, shield machine pass through after ventilating shaft foundation pit the recharge water extracted in foundation pit by backfill material driving and assembled shield duct piece, Backfill material and shield duct piece are removed, portal and ventilating shaft remaining structure are finally applied.This method lags first is that can solve the duration, Second is that primary received risk can be originated to avoid primary.
The step S1 is further comprising the steps of:
Digging to being arranged two rows of central posts after substrate in the middle part of ventilating shaft foundation pit, the outer boundary of central post described in any side and The spacing of the inner boundary of the side wall ipsilateral with it meets the digging of shield machine by space, is arranged outside the ventilating shaft foundation pit U-shaped Ground-connecting-wall and dewatering well；
Wherein, the boundary zone is asphalt felt.
The backfill material includes the outer boundary positioned at the M5 mortar of two rows of neutral intercolumniations and positioned at any side central post Plastic concrete between the inner boundary of the side wall ipsilateral with it.
Increase filling out for synchronous grouting when 2 rings tunnel in 5 rings outside U-shaped ground-connecting-wall and ventilating shaft foundation pit in the step S4 Coefficient is filled, simultaneous grouting slurry mixes micro-expanding agent；The every ring of 2 rings all carries out two in 4 rings outside the U-shaped ground-connecting-wall of ventilating shaft and ventilating shaft Secondary slip casting, grouting sequence are from bottom to up, carry out slip casting from right to left；Cement slurry and waterglass liquid double paddles are injected when secondary grouting Liquid.
Supplement slip casting is carried out to the section of jurisdiction of the close portal position of ventilating shaft foundation pit after shield machine passes through in the step S4 to add Gu.
The construction that recharge water in ventilating shaft is extracted in the step S4 is to operate stage by stage, monitors and records the soil body inside and outside foundation pit Misalignment controls recharge water level in ventilating shaft, cuts backfill material from ventilating shaft main structure both ends after the completion of drawing water and ensures in tunnel Water leakage situation is controllable, and supplement slip casting is carried out if uncontrollable.
Before step S4 shield duct piece in ventilating shaft foundation pit the small-sized crusher in reservation tear down section of jurisdiction lifting space, remove at least Crusher is transported to after two endless tube pieces and completes the broken of remaining section of jurisdiction in tunnel and hangs out.
The present invention provides the construction embodiment of a kind of ventilating shaft structure and shield driving parallel construction, as Figure 2-3, construction reason It reads, and the ventilating shaft building enclosure for realizing the theory and antiseepage and draining safeguard and driving outside middle standing pillar design, end Process grout injection control measure.
Step S1, ventilating shaft building enclosure and neutral post design
S1.1, for needed between 5 inner boundary of ventilating shaft building enclosure side wall and 13 outer boundary of central post guarantee shield continuously dig Into the space for passing through intermediate ventilating shaft；
S1.2, neutral post design need to not only can guarantee ventilating shaft main structure stability and rigidity requirement, but also be able to satisfy shield pick It is required into fine adjustment of attitude and the practical cornering ability of the turning radius and shield machine of tunnel center line 16 requires.
Step S2, the construction flow process of ventilating shaft building enclosure and backfill
After S2.1, excavation of foundation pit to bottom surface absolute altitude construct bottom plate under uplift pile 1 and bottom plate 3, bottom plate 3 maintenance and meanwhile side of constructing Wall waterproof and last one of concrete support 8；
S2.2, the template for installing side wall 5 are laid with one layer of asphalt felt 4,13 Cast-in-situ Piles in Sand-filling of central post after the completion of the construction of side wall 5 Material 2, remaining position backfill plastic concrete 7；
S2.3, the template for removing plate 10 in the last laying simultaneously of one of concrete support 8；
S2.4, backfill plastic concrete and sand material are laid with asphalt felt to the template of middle plate 10；
S2.5, successively bottom-up continuous productive process set up full hall scaffold and are sequentially completed the remainder of side wall, concrete The pouring construction of support and middle plate；
S2.6, be excavated to bottom plate position downwards from original place, the outer 2m of side wall 5 construction 600mm thickness plain concrete wall 15 with Building enclosure ground-connecting-wall 6 forms overlap joint and is respectively arranged 2 mouthfuls of dewatering wells 14 in double track tunnel two sides, both ends totally 8 mouthfuls of dewatering wells.
Step S3, shield machine passes through preceding recharge water
S3.1, according to shield machine under edpth of tunnel theoretical calculation Water And Earth Pressures collective effect directly tunnel by when outside pressure Recharge water water level is arranged in power range；
S3.2, recharge water 12 into ventilating shaft, and monitor soil body lateral displacement and fluctuation in stage variation inside and outside foundation pit；
Horizontal grouting pipe and vertical Grouting Pipe, Grouting Pipe interval 2m, when shield duct piece 9 and side are set in S3.3, ground-connecting-wall The closure of polyurethane slurries can be injected when leaking between wall 5.
Step S4, ventilating shaft is passed through in shield digging
When S4.1, shield machine pass through, need to guarantee the full weight of simultaneous grouting slurry, outside ventilating shaft ground-connecting-wall 5 rings and Increase the fill factor of synchronous grouting when 2 rings tunnel in ventilating shaft, simultaneous grouting slurry mixes micro-expanding agent；
S4.2, the every ring of 2 rings all carries out secondary grouting in 4 rings outside ventilating shaft ground-connecting-wall and ventilating shaft, and grouting sequence is under It is supreme, carry out slip casting from right to left；
Synchronous grouting layer is punched using drill rod when S4.3, slip casting, it is 3MPa that pressure, which controls the standard that slip casting terminates,；
Cutter is checked and replaced before S4.4, shield machine digging ventilating shaft ground-connecting-wall over 2m, guarantee cutterhead digging power and is opened Digging face diameter avoids the occurrence of ventilating shaft ground-connecting-wall and blocks shield machine situation；
Guarantee that at least two ring seal jacking blocks are located at the shield tunnel upper half, are convenient for later period section of jurisdiction when S4.4, shield segment assembling It removes；
S4.5, shield digging pass through after ventilating shaft need to outside ventilating shaft Fourth Ring, two endless tube on pieces are each in ventilating shaft increases 2 injected holes newly Supplement slip casting is carried out, injection participates in the polyurethane of bulking machine, and grouting sequence is from bottom to up.Drill rod punches synchronous grouting layer, note Slurry termination criteria is to have polyurethane outflow or water-tight after adjacent holes are opened；
S4.6, before cutting section of jurisdiction, ventilating shaft ground-connecting-wall and shield tunnel intersection section of jurisdiction injected hole, no leak or leak are opened Amount gradually decreases, and can carry out in next step.If still there is water leakage, polyurethane leak stopping is injected by ground-connecting-wall built-in slip casting pipe.
Step S5, it removes section of jurisdiction and applies portal
S5.1, stage by stage pump drainage recharge water, by small-sized crusher be transported to middle plate cut readjustment material, in which: tunnel top and Side mortar is abolished together depending mainly on section of jurisdiction, and the remaining mortar being bonded together with main structure is by the way of manually abolishing It is cut；
After the completion of S5.2, backfill material are cut, by crusher is transported to tunnel after the BOB(beginning of block) dismounting at least 2 endless tube pieces that bind In, it completes remaining section of jurisdiction and cuts
S5.3, construction tunnel portal complete ventilating shaft remainder structure construction.
Industrial applicibility of the invention:
1, ventilating shaft bottom plate and side wall backfill plastotype concrete and sand and asphalt felt as boundary zone and is rationally set together with being laid with Set shield driving route, solve " standing after first tunnel " method need to adjust shield machine continuously tunnel route and get around central post technology it is difficult Topic, the bottom steel for reducing side wall angle fall to support；Backfill after the completion of add one of asphalt felt be isolated and constructs in plate when be not necessarily to set up Scaffold and laying bottom template.Determine suitable backfill material matching parameter, rear intermediate ventilating shaft of constructing can quickly cut completion Subsequent construction realizes shield complete machine quickly through the parallel construction with intermediate ventilating shaft main structure.
2, using a variety of slip casting measures and design reasonable grouting sequence, slip casting position and slurry material match, mix swollen Change machine enhances slurry dilatancy effect and rapid hardening, and intermediate ventilating shaft portal of constructing after solution " standing after first tunnel " method is anti-with tunnel shaft interface Water problems realizes intermediate ventilating shaft residue main body construction and shield driving parallel operations.
3, it hangs out after removing section of jurisdiction with small-sized crusher and applies portal again, change traditional shield machine and shut down and wait paving In rail, ventilating shaft be arranged steel jacket box, originate the series of measures such as bracket receive and it is secondary originate the situation missed the stop, effectively shorten shield Tunnel the duration, simplified and originated and receives portal external end head plain concrete wall and three axes agitating pile reinforcement process, saving engineering at This.
In short, missing the stop the method with intermediate ventilating shaft parallel construction using shield driving of the present invention, solves centre Ventilating shaft construction speed lag can not provide the technical problem of shield acceptable conditions on time, invented shield miss the stop it is flat with intermediate ventilating shaft The new process of row construction, has optimized portal end reinforcement measure in ventilating shaft, realizes shield and misses the stop and originates without secondary, letter Construction technology is changed, reduce construction cost and has effectively shortened the duration, has filled up the direct digging of shield machine and missed the stop and ventilating shaft The technological gap of main structure parallel construction, with good economic efficiency and social benefit, this method is especially suitable for tunnel Shield passes through intermediate ventilating shaft excavation work when the larger end consolidation effect of buried depth is difficult to ensure.
Although the embodiments of the present invention have been disclosed as above, but its is not only in the description and the implementation listed With it can be fully applied to various fields suitable for the present invention, for those skilled in the art, can be easily Realize other modification, therefore without departing from the general concept defined in the claims and the equivalent scope, the present invention is simultaneously unlimited In specific details and legend shown and described herein.
Claims (7)
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| CN201610822445.7A CN106522989B (en) | 2016-09-14 | 2016-09-14 | The method of ventilating shaft structure and shield driving parallel construction |
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| CN201610822445.7A CN106522989B (en) | 2016-09-14 | 2016-09-14 | The method of ventilating shaft structure and shield driving parallel construction |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107514262A (en) * | 2017-08-02 | 2017-12-26 | 中国建筑第八工程局有限公司 | The construction method of shield piping lane |
| CN107664035B (en) * | 2017-10-20 | 2020-03-20 | 中国建筑第八工程局有限公司 | Shield-well-after-shield construction method for shield pipe gallery |
| CN109162741B (en) * | 2018-10-29 | 2020-02-07 | 中铁十二局集团有限公司 | Method for synchronous construction of shield penetrating piston air duct and upper structure of piston air duct |
| CN109577998B (en) * | 2018-12-04 | 2020-10-09 | 中铁十二局集团有限公司 | Construction method for backfilling and station-crossing of piston air duct in shield interval |
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| US5302052A (en) * | 1993-04-16 | 1994-04-12 | Groundtech, Inc. | Underground work chamber assembly and method for the construction thereof |
| JP3120244B2 (en) * | 1991-07-23 | 2000-12-25 | 株式会社竹中土木 | Installation start method of shield machine of vertical shield method |
| CN102094650A (en) * | 2009-12-14 | 2011-06-15 | 上海市基础工程有限公司 | Construction method for shield holing under complicated working conditions |
| CN102146679A (en) * | 2010-02-09 | 2011-08-10 | 中铁十一局集团有限公司 | Construction method for complex geological section earth pressure balance shield passing middle air shaft |
| CN104653188A (en) * | 2015-02-04 | 2015-05-27 | 北京市政建设集团有限责任公司 | Method for arranging large-diameter shield receiving and originating well in underground-excavated air duct |
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- 2016-09-14 CN CN201610822445.7A patent/CN106522989B/en active IP Right Grant
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3120244B2 (en) * | 1991-07-23 | 2000-12-25 | 株式会社竹中土木 | Installation start method of shield machine of vertical shield method |
| US5302052A (en) * | 1993-04-16 | 1994-04-12 | Groundtech, Inc. | Underground work chamber assembly and method for the construction thereof |
| CN102094650A (en) * | 2009-12-14 | 2011-06-15 | 上海市基础工程有限公司 | Construction method for shield holing under complicated working conditions |
| CN102146679A (en) * | 2010-02-09 | 2011-08-10 | 中铁十一局集团有限公司 | Construction method for complex geological section earth pressure balance shield passing middle air shaft |
| CN104653188A (en) * | 2015-02-04 | 2015-05-27 | 北京市政建设集团有限责任公司 | Method for arranging large-diameter shield receiving and originating well in underground-excavated air duct |
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| CN106522989A (en) | 2017-03-22 |
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