CN101781991B - Double-well type reinforcement method of shield arrival or starting end and double-well type shield arrival method - Google Patents

Double-well type reinforcement method of shield arrival or starting end and double-well type shield arrival method Download PDF

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Publication number
CN101781991B
CN101781991B CN2010101236831A CN201010123683A CN101781991B CN 101781991 B CN101781991 B CN 101781991B CN 2010101236831 A CN2010101236831 A CN 2010101236831A CN 201010123683 A CN201010123683 A CN 201010123683A CN 101781991 B CN101781991 B CN 101781991B
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China
Prior art keywords
shield
well
leading
starting
arrival
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CN2010101236831A
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Chinese (zh)
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CN101781991A (en
Inventor
辛振省
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中铁三局集团有限公司
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Abstract

The invention belongs to the technical field of shield arrival methods in shield tunnel construction engineering, in particular to a double-well type reinforcement method of a shield arrival or starting end and a double-well type shield arrival method, solving the problems of larger risks and high cost of the traditional shield arrival methods. The double-well type reinforcement method of the shield arrival or starting end is characterized in that an advance well is arranged outside a final arrival well or a station of the shield arrival or starting end. The invention has the advantages that water is blocked outside the advance well in advance by utilizing the advance well so as to ensure that a shield machine carries out arrival construction under the geological condition of no water, thereby radically changing an original geological condition, breaking up the huge risk of the shield arrival into parts, radically avoiding the huge risk of water and sand jetting during shield arrival in an area of a water and sand rich layer and reducing the hazard rate by more than 50 percent at least; and moreover, expenses generated by large-area full section reinforcement are saved to a certain extent. The invention has simple process method, convenient construction, low manufacturing cost and convenient popularization.

Description

The twin-well formula reinforcement means and the twin-well formula shield structure method of reseptance of reception of shield structure or starting end head

Technical field

The invention belongs to the technical field of shield structure method of reseptance in the shield tunnel construction project, the twin-well formula reinforcement means that is specifically related to reception of shield structure or starting end head reaches the twin-well formula shield structure method of reseptance based on its completion.

Background technology

Shield method is as advanced method municipal and other major works extensive uses by city underground and other of tunnel excavation; The working security of shield method and speed of application will be higher than existing New Austrian Tunneling Method and other method for tunnel construction far away in the process of tunnel excavation; But; Shield structure receiver section is the bottleneck of whole shield tunnel construction, and shield structure reception technique is still the construction section of excessive risk, high cost so far.

Existing shield structure reception technique mainly contains:

1. the full section reinforcing technique of rotary churning pile+agitation pile method.Promptly; A period of time reinforces carrying out agitation pile in the shield structure receiving terminal head tunnel section certain limit in advance; To agitation pile reinforce less than or the relatively poor place of consolidation effect carry out high-pressure rotary jet grouting pile and reinforce; Reinforce the back composite soil and have certain intensity and water resistance, guaranteed that to a certain extent the safety of shield structure receives.Though but this method job practices is simple, cost is not low, the most important thing is that consolidation effect is often undesirable; The latter half of tunnel cross-section because buried depth is bigger, generally is difficult to pile; Do not reach the consolidation effect of anticipation at all; Especially in high hydraulic pressure layer of sand area, big the increasing that have a big risk that this kind method receives caused a lot of calamitous engineering accidents.

2. horizontal grouting reinforcing method.That is, at the portal place of end well, applying high voltage is pressed into the perhaps single liquid slurry of biliquid slurry to end soil body and carries out the termination reinforcing.Though this kind method has effectively remedied the defective of first method can be from vertically effectively reinforcing the peripheral soil body of tunnel cross-section; But its weak point is: on the one hand; Reaching predetermined reinforcing scope and effect grouting pressure is difficult to grasp; Be easy to cause the large tracts of land protuberance on ground, especially in the busiest section in city, it is very harmful; On the other hand, because this kind grouting method belongs to the fracture grouting method, the interlayer phenomenon that adds solid is more, and the folder mud layer often becomes the great risk source; Moreover this kind reinforcement means cost is high, only is applicable in the special engineering, is difficult to popularize.

Summary of the invention

The present invention is in order to solve the problems referred to above that existing shield structure method of reseptance exists; Broken the mindset of traditional single received well, before the also not final reception of shield structure, in the underground leading well of establishing in advance, received; Break the whole up into parts risk, finally reach not only safety but also economic purpose.

The present invention adopts following technical scheme to realize:

A kind of shield structure receives or the twin-well formula reinforcement means of starting end head, it is characterized in that the shield structure receives or the final received well of starting end head or station outside leading well is set.

The shield structure receives or the twin-well formula reinforcement means of starting end head, and the wall of safeguarding at final received well or station becomes in advance outward that " to form diaphragm wall be the plain wall of outsourcing to the cast plain concrete in [" shape groove, groove; The plain wall of outsourcing with safeguard the wall leading well of formation that links to each other; The scope that leading well is surrounded, fore-and-aft distance is greater than the length of shield machine, and lateral separation is greater than the distance between the two shield tunnel outer rims; The bottom of leading well embeds impervious layer under the tunnel, and the top is higher than superlatively descends water level.

The lateral separation of said leading well is than the big 2~5m of distance between the two shield tunnel outer rims.The bottom of leading well embeds the degree of depth of impervious layer under the tunnel more than or equal to 1m.In rich water area, the top of leading well can flush with ground.

Twin-well formula shield structure method of reseptance is accomplished based on the above-mentioned shield structure reception or the twin-well formula reinforcement means of starting end head, and step is following:

1), shield machine arrives the plain wall of outsourcing of leading well, the parameter of adjustment shield machine makes the shield structure slowly polish the plain wall of concrete until the outsourcing element wall of cutter head of shield machine through leading well,

2), slowly advance and get into leading well fully, then the shutoff processing is carried out in the slit between tunnel, the section of jurisdiction outer rim of the aperture of the plain wall of leading well outsourcing and assembly unit until the shield structure;

3), after shutoff accomplishes, cut the portal at final received well or station place, the shield structure receives smoothly and enters the station.

The present invention has following beneficial effect: the present invention utilizes leading well, keeps off water in advance outside leading well, makes shield machine not have to receive construction under the geological conditions of water; Fundamentally changed original geological conditions, the great risk that receives the shield structure breaks the whole up into parts, and has fundamentally solved the great risk that gushing water when water-rich sand layer area shield structure receives emits sand; Reduce relative risk at least more than 50%; And saved the full section of large tracts of land to a certain extent and reinforced the expense that produces, process is simple, and clear thinking is clear; Easy construction and cost are low, are convenient to popularize.

Description of drawings

Fig. 1 is the scope sketch map of leading well

Fig. 2 is the height and the degree of depth sketch map of leading well

Fig. 3-1 is leading well outside sketch map for shield machine arrives

Fig. 3-2 for cutter head of shield machine through the plain wall sketch map of leading well outsourcing

Fig. 3-3 is that shield machine is fully through the plain wall sketch map of leading well outsourcing

Fig. 3-4 is intermarginal hole sketch map outside slip casting or plain wall of additive method shutoff outsourcing and the tunnel

Fig. 3-5 receives sketch map for shield machine through the station exterior wall smoothly

Among the figure: the leading well of 1-, the 2-shield tunnel, the 3-shield machine, 4-safeguards wall; The 5-portal, final received well of 6-or station, impervious layer under the 7-tunnel, the plain wall of 8-outsourcing; The 9-face of land, 10-is the tunnel, section of jurisdiction of assembly unit, intermarginal hole outside 11-diaphragm wall and the tunnel, section of jurisdiction; 12-shutoff hole, 13-is the tunnel of excavation in advance, 14-station base plate.

The specific embodiment

Be described further in conjunction with the accompanying drawing specific embodiments of the invention.

Being provided with leading well outside the final received well of shield structure reception of the present invention or starting end head or the station is that the impervious layer buried depth that is directed against under the shield tunnel is not that too big shield structure receives operating mode.

Its concrete implementation method is: received well or station safeguard that certain limit becomes in advance outside the wall 4 " [" shape groove, pouring into a mould plain concrete then, to form diaphragm wall be the plain wall 8 of outsourcing, the plain wall 8 of outsourcing with safeguard the wall 4 leading well 1 of formation that links to each other; The scope that leading well 1 is surrounded vertically should be greater than shield machine length, laterally should be greater than the outer rim certain distance in two tunnels; As shown in Figure 1, the degree of depth should embed impervious layer 7 certain depths under the tunnel, and the top will be higher than superlatively descends water level; In rich water area; For the purpose of easy construction, the plain wall of outsourcing top can flush with ground, and is as shown in Figure 2.

When the shield structure received, shield machine at first arrived the plain wall of outsourcing of leading well, shown in Fig. 3-1.The parameter (as: cutterhead rotating speed, fltting speed etc.) of adjustment shield machine makes the shield structure slowly polish the plain wall of outsourcing until the outsourcing element wall of cutter head of shield machine through leading well, shown in Fig. 3-2.Then, slowly advance and get into leading well fully, shown in Fig. 3-3 until the shield structure.Then the shutoff processing is carried out in the slit between tunnel, the section of jurisdiction outer rim of the aperture of the plain wall of leading well outsourcing and assembly unit, like Fig. 3-4.After shutoff is accomplished, cut the portal at final received well or station place, the shield structure receives smoothly and enters the station, shown in Fig. 3-5.

The situation of shield launching is the inverse process that the shield structure receives construction, and principle and method and shield structure receive identical.

Claims (5)

1. a shield structure receives or the twin-well formula reinforcement means of starting end head; It is characterized in that the shield structure receives or the final received well of starting end head or station outside leading well is set, " to form diaphragm wall be the plain wall (8) of outsourcing to the cast plain concrete in [" shape groove, groove for the safeguarding that wall (4) is outer and become in advance of final received well or station; The plain wall of outsourcing (8) with safeguard wall (4) the formation leading well (1) that links to each other; The scope that leading well (1) is surrounded, fore-and-aft distance is greater than the length of shield machine (3), and lateral separation is greater than the distance between two shield tunnels (2) outer rim; The bottom of leading well (1) embeds impervious layer (7) under the tunnel; The top is higher than superlatively descends water level, and in rich water area, the top of leading well flushes with ground.
2. the twin-well formula reinforcement means of shield structure reception according to claim 1 or starting end head, the lateral separation that it is characterized in that said leading well (1) is than the big 2~5m of distance between two shield tunnels (2) outer rim.
3. shield structure according to claim 1 and 2 receives or the twin-well formula reinforcement means of starting end head, it is characterized in that the degree of depth that the bottom of described leading well (1) embeds impervious layer (7) under the tunnel is more than or equal to 1m.
4. twin-well formula shield structure method of reseptance, described method is based on claim 1 or 2 described shield structures receive or the twin-well formula reinforcement means of starting end head is accomplished, and it is characterized in that step is following:
1), shield machine arrives the outside of leading well, the parameter of adjustment shield machine makes the shield structure slowly polish the plain wall of outsourcing until the outsourcing element wall of cutter head of shield machine through leading well,
2), slowly advance and get into leading well fully, then the shutoff processing is carried out in the slit between tunnel, the section of jurisdiction outer rim of the aperture of the plain wall of leading well outsourcing and assembly unit until the shield structure;
3), after shutoff accomplishes, cut the portal at final received well or station place, the shield structure receives smoothly and enters the station.
5. twin-well formula shield structure method of reseptance, described method receives based on the described shield structure of claim 3 or the twin-well formula reinforcement means of starting end head is accomplished, and it is characterized in that step is following:
1), shield machine arrives the outside of leading well, the parameter of adjustment shield machine makes the shield structure slowly polish the plain wall of outsourcing until the outsourcing element wall of cutter head of shield machine through leading well,
2), slowly advance and get into leading well fully, then the shutoff processing is carried out in the slit between tunnel, the section of jurisdiction outer rim of the aperture of the plain wall of leading well outsourcing and assembly unit until the shield structure;
3), after shutoff accomplishes, cut the portal at final received well or station place, the shield structure receives smoothly and enters the station.
CN2010101236831A 2010-02-10 2010-02-10 Double-well type reinforcement method of shield arrival or starting end and double-well type shield arrival method CN101781991B (en)

Priority Applications (1)

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CN2010101236831A CN101781991B (en) 2010-02-10 2010-02-10 Double-well type reinforcement method of shield arrival or starting end and double-well type shield arrival method

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CN101781991B true CN101781991B (en) 2012-05-30

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108316307A (en) * 2018-02-08 2018-07-24 青岛理工大学 The construction method that shield machine station originates

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102011596B (en) * 2010-11-29 2012-07-11 中铁三局集团有限公司 Shield originating or receiving end tunnel portal maintenance process
CN102322269B (en) * 2011-08-30 2013-04-24 北京城乡建设集团有限责任公司 Super early receiving supporting structure of shield machine and super early receiving method
CN102434718B (en) * 2011-09-08 2013-07-03 广东省基础工程公司 Method for reinforcing originating end of push bench
CN103291317B (en) * 2013-06-19 2016-03-09 上海隧道工程有限公司 Old tunnel duct piece removes the construction method expanding with tunnel and tunnel expanding machine
CN104018842B (en) * 2014-05-04 2016-11-02 广东水电二局股份有限公司 A kind of shield machine arrives reception structure and the method for reseptance thereof of driving terminal
CN107023303A (en) * 2017-04-10 2017-08-08 中铁十四局集团有限公司 A kind of large-diameter shield machine earthing balancing safety method of reseptance
CN108999218B (en) * 2018-08-14 2020-11-24 中铁十二局集团有限公司 Construction method for shield interval construction to penetrate through anti-seepage plate wall
CN109751056A (en) * 2019-01-31 2019-05-14 中铁工程装备集团有限公司 A kind of water rich strata shield-tunneling construction active well end processing method

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JP2001115772A (en) * 1999-10-21 2001-04-24 Kajima Corp Connection method for existing tunnel and new tunnel
JP2001182477A (en) * 1999-12-28 2001-07-06 Sekisui Chem Co Ltd Device of partition iron plate
CN1789666A (en) * 2005-12-27 2006-06-21 上海市隧道工程轨道交通设计研究院 Waterproof device for entrance of shield tunnel
CN101182772A (en) * 2007-11-20 2008-05-21 中铁二局股份有限公司 Two lines intersection small radius, shallow earth covering and large longitudinal slope complicated linetype shield construction method

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Publication number Priority date Publication date Assignee Title
JP2001115772A (en) * 1999-10-21 2001-04-24 Kajima Corp Connection method for existing tunnel and new tunnel
JP2001182477A (en) * 1999-12-28 2001-07-06 Sekisui Chem Co Ltd Device of partition iron plate
CN1789666A (en) * 2005-12-27 2006-06-21 上海市隧道工程轨道交通设计研究院 Waterproof device for entrance of shield tunnel
CN101182772A (en) * 2007-11-20 2008-05-21 中铁二局股份有限公司 Two lines intersection small radius, shallow earth covering and large longitudinal slope complicated linetype shield construction method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108316307A (en) * 2018-02-08 2018-07-24 青岛理工大学 The construction method that shield machine station originates
CN108316307B (en) * 2018-02-08 2020-01-14 青岛理工大学 Construction method for starting shield machine station

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