CN103899324A - Construction method for balance originating of earth pressure balance shield machine - Google Patents

Construction method for balance originating of earth pressure balance shield machine Download PDF

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Publication number
CN103899324A
CN103899324A CN201410142038.2A CN201410142038A CN103899324A CN 103899324 A CN103899324 A CN 103899324A CN 201410142038 A CN201410142038 A CN 201410142038A CN 103899324 A CN103899324 A CN 103899324A
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China
Prior art keywords
shield
steel jacket
jacket box
portal
construction method
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Granted
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CN201410142038.2A
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Chinese (zh)
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CN103899324B (en
Inventor
张细宝
刘志刚
陈世君
江欢
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China Railway No 5 Engineering Group Co Ltd
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China Railway No 5 Engineering Group Co Ltd
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Priority to CN201410142038.2A priority Critical patent/CN103899324B/en
Publication of CN103899324A publication Critical patent/CN103899324A/en
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Abstract

Disclosed is a construction method for balance originating of an earth pressure balance shield machine. A steel cover box is mounted on a steel ring of a tunnel entrance before originating of the earth pressure balance shield machine. When a cutter of the shield machine enters the tunnel entrance before originating and tunneling, a shield is enveloped through the steel cover box to form an annular cavity, reverse water stop during originating can be realized through injecting grease and the like into the cavity, and active sealing pressure can be established. Water and soil pressure at the position of the tunnel entrance can be balanced through reverse water stop pressure of the steel cover box, and balance originating of the earth pressure balance shield machine can be realized.

Description

A kind of construction method of balancing earth-pressure shielding machine balance originating
Technical field
The present invention relates to a kind of construction techniques, particularly relate to a kind of construction method of balancing earth-pressure shielding machine balance originating.
 
Background technology
Shield method is the special-purpose machinery of bored tunnel is built tunnel a kind of construction method at below ground.Along with developing by leaps and bounds of urban rail transit in China engineering, shield method is widely used, and shield structure technology also obtains larger breakthrough development, the earth pressure balanced shield, EPBS being especially most widely used.Meanwhile, shield-tunneling construction accident also increases thereupon, and particularly contingency occurrence probability is higher the shield launching stage.Shield launching refers to that shield machine starts the work progress of driving from shield machine working shaft.
The shield launching construction stage refers to from abolishing the construction stage portal, shield structure initial propulsion are launched to the full operation such as shield driving, pipe sheet assembling, wall thickness slip casting, dregs transport.This stage is more difficult control risk shield body and the Dong Quan gap of portal formation while being mainly derived from initial driving water burst, gush sand, folding paper sealing clamp and rubber cord sealing device are installed for this reason on the pre-buried steel loop of portal, and this device is in bearing from portal when Water And Earth Pressures and passive compression seal.But because this hole ring seal device self bearing capacity is limited, can not there be a weak link several folding pressing plate unit, and affected by the appear real circularity of attitude and portal steel loop etc. of shield structure, when shield launching is appeared, often can not seal completely and occur water burst, gush sand dangerous situation, when serious, can cause the landslide on starting end head ground.
For ensureing the earth pressure balanced shield, EPBS safety that starts, before shield launching, reply end soil body carries out ground stabilization.Stabilization zone length should be greater than shield machine length, and shield structure can be tunneled safely to setting up earth pressure balance.But in subway shield tunnel construction, limited by traffic above-ground, pipeline and building, ground stabilization section length is less than shield machine length, or strengthening quality is affected, and this is also the reason that dangerous situation often appears in shield launching.
?
Summary of the invention
The object of the invention is for the problems referred to above, propose a kind of method of balancing earth-pressure shielding machine balance originating, can avoid shield launching driving time, hole is enclosed water burst, is gushed sand, effectively ensures the safety of shield structure and active well foundation ditch.
Technical scheme of the present invention is:
A construction method for balancing earth-pressure shielding machine balance originating, the construction method of shield structure balance originating comprises the following steps:
(1), folding paper cord rubber temporary sealing device and steel jacket box are installed on portal steel loop; Described steel jacket box is that cylinder internal diameter is greater than shield body diameter by connecting cylindrical shell and seal ring cylinder dimerous; Connect cylindrical shell one end and directly dock full weld with portal steel loop hoop; The other end is connected with seal ring, is provided with reverse antipriming in seal ring, and end is provided with end shrouding;
(2), the guide rails assembling that starts in steel jacket box and portal, reverse antipriming in steel jacket box is carried out to hand grease;
(3), cut the space enclosing structure in portal, confirm not have the not machinable member of cutterhead in portal;
(4), bear ring pipe sheet assembling, advance shield machine, shield body enters steel jacket box, the cutterhead of shield machine support to portal face, shield machine halts;
(5), install at the seal ring end of steel jacket box, fixation ends shrouding, in the reverse antipriming of steel jacket box, push down full seal grease;
(6), start shield machine, shield machine starts driving, meanwhile, continues to push down grease in steel jacket box, injects inertia water-stop slurry to connecting in cylindrical shell, maintains seal ring internal pressure and is not less than cutterhead face Water And Earth Pressures;
(7), shield tail enters after steel jacket box completely, tightens up and fix end shrouding on negative endless tube sheet;
(8), shield tail enters after portal circle, opens shield tail synchronous grouting, shield launching completes.
In step of the present invention (1), steel jacket box is fixed on outside portal steel loop, and steel jacket box is concentric with portal steel loop, coaxial line; When shield launching driving, first through steel jacket box, the inner reverse water-stopping sealing device of steel jacket box was pressed on external week of shield; Shield machine is through after steel jacket box, and negative endless tube sheet is released shield tail, and the inner reverse antipriming automatic impaction of steel jacket box is in negative endless tube sheet periphery.
Step of the present invention (1) also comprises before: to Suporting structure assemble, debug and start counter-force support system install; Ground to starting end head is reinforced, and reaches after the requirement that portal cuts, and space enclosing structure in portal is cut for the first time to residue outer reinforcement and concrete.
Between step of the present invention (5) and (6), also comprise: connect the water filling of cylindrical shell upper pipeline to cutter head of shield machine and steel jacket box, carry out steel jacket box tightness test, check the airtight performance of cavity between shield body and steel jacket box, after having tested, get rid of test water.
Steel jacket box of the present invention is provided with the first grease injection hole, the second grease injection hole and slurries injection hole; End shrouding is fixed on seal ring end by bar shaped pin hole, and it is poor that bar shaped pin hole length is greater than the external diameter of shield body and negative endless tube sheet, in order to the radial clearance of shutoff shield body, negative endless tube sheet and steel jacket box.
Negative endless tube sheet of the present invention is the concrete circular structure that subway tunnel supports.
When shield structure of the present invention is appeared, adopt the filling of grease and inertia water-stop slurry to carry out hole circle sealing.
Beneficial effect of the present invention:
The present invention has installed steel jacket box before balancing earth-pressure shielding machine starts on portal steel loop.Cutter head of shield machine enters portal, but also ont yet excavate into time, shield body is encircled by steel jacket box, forms hoop cavity, by inject the reverse sealing of realization such as grease while starting in chamber, sets up the sealing load of active.This reverse sealing pressure by steel jacket box carrys out the Water And Earth Pressures at balance portal place, thereby realizes the balance originating of balancing earth-pressure shielding machine.
 
Brief description of the drawings
Fig. 1 is structural configuration schematic diagram of the present invention.
Fig. 2 is that cutter head of shield machine of the present invention supports into portal face schematic diagram.
Fig. 3 is shield launching prosthomere point diagram of the present invention.
Fig. 4 is shield launching deutomerite point diagram of the present invention.
Wherein:
1, shield machine; 2, negative endless tube sheet; 3, the counter-force support system that starts; 4, the pedestal that starts; 5, portal; 6, steel jacket box; 7, folding paper cord rubber temporary sealing device; 8, internal layer space enclosing structure; 9, remain outer space enclosing structure; 10, shield structure well headwall; 11, face; 12, slurries injection hole; 13, the first grease injection hole; 14, the second grease injection hole; 15, end shrouding; 16, reverse antipriming.
 
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is further illustrated.
As shown in Figure 1, a kind of construction method of balancing earth-pressure shielding machine balance originating,
1) carrying out shield machine 1 by normal process assembles, debugs and the counter-force support system 3 that starts is installed;
2) starting end head ground stabilization reaches after the requirement that portal cuts, and in portal, space enclosing structure cuts for the first time, cuts portal internal layer space enclosing structure 8, remains outer space enclosing structure 9;
3) folding paper cord rubber temporary sealing device 7 and steel jacket box 6 are installed on portal 5;
4) steel jacket box 6 and the interior installation of portal 5 guide rail that starts, so that shield machine 1 advances along planned course; To the interior reverse antipriming 16 hand greases of steel jacket box 6;
5) in portal, space enclosing structure 8 cuts for the second time, cuts other member in outer space enclosing structure 9 and portal, confirms not have the not machinable member of cutterhead in portal;
Then, as shown in Figure 2,
6) negative endless tube sheet 2 is assembled, and shield machine 1 advances, and shield body enters steel jacket box 6, and shield machine 1 cutterhead supports to the interior face 11 of portal 5;
As shown in Figure 2,3,
7) the end shrouding 15 of installation, stationary steel bushing case 6 is pushed down full seal grease by the first grease injection hole 13 and the second grease injection hole 14 in the reverse antipriming 16 of steel jacket box 6;
8) by slurries injection hole 12 to water filling on the cutterhead of shield machine 1 and the connection cylindrical shell pipeline of steel jacket box 6, carry out the tightness test of steel jacket box 6, check the airtight performance of cavity between shield machine 1 shield body and steel jacket box 6;
9) tightness test qualified after, get rid of test water;
10) start shield machine 1, shield machine 1 starts driving, meanwhile, continues to push down grease in steel jacket box 6, injects inertia water-stop slurry to connecting in cylindrical shell, and the seal ring internal pressure that maintains steel jacket box 6 is not less than cutterhead face Water And Earth Pressures;
As shown in Figure 4:
11) shield machine 1 shield tail enters after steel jacket box 6 completely, tightens up and fix end shrouding 15 on negative endless tube sheet 2;
12) shield machine 1 shield tail enters after portal 5 circles, opens shield machine 1 shield tail synchronous grouting, and shield launching completes.
The part that the present invention does not relate to all prior art that maybe can adopt same as the prior art is realized.

Claims (7)

1. a construction method for balancing earth-pressure shielding machine balance originating, is characterized in that the construction method of shield structure balance originating comprises the following steps:
(1), folding paper cord rubber temporary sealing device (7) and steel jacket box (6) are installed on the steel loop of portal (5); Described steel jacket box (6) is that cylinder internal diameter is greater than the shield body diameter of shield machine (1) by connecting cylindrical shell and seal ring cylinder dimerous; Connect cylindrical shell one end and directly dock full weld with portal steel loop hoop; The other end is connected with seal ring, is provided with reverse antipriming (16) in seal ring;
(2), the guide rails assembling that starts in steel jacket box (6) and portal, reverse antipriming (16) in steel jacket box (6) is carried out to hand grease;
(3), cut portal internal layer space enclosing structure (8), confirm not have the not machinable member of cutterhead in portal;
(4), to bear endless tube sheet (2) assembled, advances shield machine (1), shield body enters steel jacket box (6), the cutterhead of shield machine (1) supports to portal face (11), shield machine (1) halts;
(5), install at the seal ring end of steel jacket box (6), fixation ends shrouding (15), in the reverse antipriming (16) of steel jacket box (6), push down full seal grease;
(6), start shield machine (1), shield machine (1) starts driving, meanwhile, continues to push down grease in steel jacket box (6), injects inertia water-stop slurry to connecting in cylindrical shell, maintains seal ring internal pressure and is not less than cutterhead face Water And Earth Pressures;
(7), shield tail enters after steel jacket box (6) completely, tightens up and fix end shrouding on negative endless tube sheet (2);
(8), shield tail enters after portal circle, opens shield tail synchronous grouting, shield launching completes.
2. the construction method of balancing earth-pressure shielding machine balance originating according to claim 1, is characterized in that, in step (1), steel jacket box (6) is fixed on outside portal steel loop, and steel jacket box (6) is concentric with portal steel loop, coaxial line; When shield machine (1) starts driving, first, through steel jacket box (6), the inner reverse antipriming of steel jacket box (6) (16) was pressed on external week of shield; Shield machine (1) is through after steel jacket box, and negative endless tube sheet (2) is released shield tail, and inner reverse antipriming (16) automatic impaction of steel jacket box is in negative endless tube sheet (2) periphery.
3. the construction method of balancing earth-pressure shielding machine balance originating according to claim 1, is characterized in that: step (1) also comprises before: to Suporting structure assemble, debug and start counter-force support system install; Ground to starting end head is reinforced, and reaches after the requirement that portal cuts, and space enclosing structure in portal (8) is cut for the first time to residue outer reinforcement and concrete.
4. the construction method of balancing earth-pressure shielding machine balance originating according to claim 1, it is characterized in that: between step (5) and (6), also comprise: to connecting water filling on the pipeline of cylindrical shell in the cutterhead of shield machine (1) and steel jacket box (6), carry out steel jacket box (6) tightness test, check the airtight performance of cavity between shield body and steel jacket box (6), after having tested, get rid of test water.
5. the construction method of balancing earth-pressure shielding machine balance originating according to claim 1 and 2, is characterized in that: steel jacket box (6) is provided with the first grease injection hole (13), the second grease injection hole (14) and slurries injection hole (12); End shrouding is fixed on seal ring end by bar shaped pin hole, and it is poor that bar shaped pin hole length is greater than the external diameter of shield body and negative endless tube sheet (2), in order to the radial clearance of shutoff shield body, negative endless tube sheet (2) and steel jacket box (6).
6. the construction method of balancing earth-pressure shielding machine balance originating according to claim 5, is characterized in that: the concrete circular structure that negative endless tube sheet (2) supports for subway tunnel.
7. according to the construction method of the balancing earth-pressure shielding machine balance originating described in claim 1 or 4, it is characterized in that: when shield structure is appeared, adopted the filling of grease and inertia water-stop slurry to carry out hole circle sealing.
CN201410142038.2A 2014-04-10 2014-04-10 A kind of construction method of balancing earth-pressure shielding machine balance originating Active CN103899324B (en)

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104358575A (en) * 2014-09-15 2015-02-18 中铁十二局集团有限公司 Sealing device for slurry shield starting of water-rich sand layer and sealing control method for starting
CN104533433A (en) * 2014-12-25 2015-04-22 中铁十七局集团第六工程有限公司 Starting method of small-radius curve tunnel
CN104847373A (en) * 2015-06-11 2015-08-19 北京市市政四建设工程有限责任公司 Gravel clay stratum shield departure and reception construction process
CN105715277A (en) * 2016-02-17 2016-06-29 广州地铁设计研究院有限公司 Construction device and method for shield tunnel
CN105822312A (en) * 2016-04-15 2016-08-03 西安建筑科技大学 Construction method for earth pressure balance shield construction pressure launching in subway tunnel engineering
CN105863657A (en) * 2016-05-27 2016-08-17 中铁二十局集团轨道交通工程有限公司 Start-side rolling collection device and start-side rolling collection method for earth pressure balance shield machine
CN107387091A (en) * 2017-06-09 2017-11-24 上海市机械施工集团有限公司 The supplementary structure and construction method of a kind of shield
CN107725059A (en) * 2017-09-27 2018-02-23 中铁十二局集团有限公司 The ultrashort miniature shield machine main frame separate launching construction method originated under steric requirements
CN108843337A (en) * 2018-06-15 2018-11-20 中铁十二局集团有限公司 A kind of construction method carrying out shield launching using short sleeve
CN108868787A (en) * 2018-06-26 2018-11-23 中铁隧道局集团有限公司 A kind of river-crossing tunnel shield launching construction method
CN113123800A (en) * 2021-05-14 2021-07-16 中铁十四局集团大盾构工程有限公司 Construction method of starting base of large-diameter shield tunnel steel structure

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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104358575A (en) * 2014-09-15 2015-02-18 中铁十二局集团有限公司 Sealing device for slurry shield starting of water-rich sand layer and sealing control method for starting
CN104358575B (en) * 2014-09-15 2017-12-08 中铁十二局集团有限公司 A kind of water-rich sand layer slurry shield originates sealing device and originates sealing control method
CN104533433A (en) * 2014-12-25 2015-04-22 中铁十七局集团第六工程有限公司 Starting method of small-radius curve tunnel
CN104847373A (en) * 2015-06-11 2015-08-19 北京市市政四建设工程有限责任公司 Gravel clay stratum shield departure and reception construction process
CN105715277A (en) * 2016-02-17 2016-06-29 广州地铁设计研究院有限公司 Construction device and method for shield tunnel
CN105822312A (en) * 2016-04-15 2016-08-03 西安建筑科技大学 Construction method for earth pressure balance shield construction pressure launching in subway tunnel engineering
CN105863657B (en) * 2016-05-27 2018-02-23 中铁二十一局集团轨道交通工程有限公司 Balancing earth-pressure shielding machine, which originates, sidewinders correcting device and method
CN105863657A (en) * 2016-05-27 2016-08-17 中铁二十局集团轨道交通工程有限公司 Start-side rolling collection device and start-side rolling collection method for earth pressure balance shield machine
CN107387091A (en) * 2017-06-09 2017-11-24 上海市机械施工集团有限公司 The supplementary structure and construction method of a kind of shield
CN107725059A (en) * 2017-09-27 2018-02-23 中铁十二局集团有限公司 The ultrashort miniature shield machine main frame separate launching construction method originated under steric requirements
CN108843337A (en) * 2018-06-15 2018-11-20 中铁十二局集团有限公司 A kind of construction method carrying out shield launching using short sleeve
CN108868787A (en) * 2018-06-26 2018-11-23 中铁隧道局集团有限公司 A kind of river-crossing tunnel shield launching construction method
CN108868787B (en) * 2018-06-26 2020-06-09 中铁隧道局集团有限公司 Shield starting construction method for river-crossing tunnel
CN113123800A (en) * 2021-05-14 2021-07-16 中铁十四局集团大盾构工程有限公司 Construction method of starting base of large-diameter shield tunnel steel structure
CN113123800B (en) * 2021-05-14 2022-04-15 中铁十四局集团大盾构工程有限公司 Construction method of starting base of large-diameter shield tunnel steel structure

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