CN102071950B - Method for protecting shield tail brush and preventing shield tail from seepage - Google Patents
Method for protecting shield tail brush and preventing shield tail from seepage Download PDFInfo
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- CN102071950B CN102071950B CN 201010562557 CN201010562557A CN102071950B CN 102071950 B CN102071950 B CN 102071950B CN 201010562557 CN201010562557 CN 201010562557 CN 201010562557 A CN201010562557 A CN 201010562557A CN 102071950 B CN102071950 B CN 102071950B
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Abstract
The invention discloses a method for protecting shield tail brushes and preventing shield tails from seepage, which includes the following steps of: pasting a compressible waterproofing and sealing filler on a duct piece gap between the splicing edges of two adjacent duct pieces after duct pieces are prefabricated; pasting the compressible waterproofing and sealing filler on a duct piece gap between the side edges of two adjacent duct pieces to splice the duct pieces into a tunnel ring; and injecting greases into shield tail cabins formed by the duct pieces, a shield body and the shield tail brushes according to sequencing to ensure that the greases in the shield tail cabins are full. Through filling the compressible waterproofing and sealing filler and sequentially injecting the greases, not only is a shield tail seepage channel is blocked, but also the grease on the shield tail can be prevented from entering the gaps, so that loss of the grease and under pressure of the shield tail cabins can be avoided, the consumption of the grease is saved, and the shield tail brushes are prevented from wearing. In the method for protecting the shield tail brushes and preventing the shield tails from seepage provided by the invention, the wearing of the tail brushes can be reduced, the shield tail has a good seepage-proofing effect, is easy to implement, has a low equipment cost, and is suitable for being widely applied to shield tunneling construction work.
Description
Technical field
The present invention relates to a kind of job practices of construction of tunnel, particularly a kind of when utilizing the shield machine tunneling, protection ventral brush and prevent the method for shield tail seepage.
Background technology
When carrying out now the Large Underground construction of tunnel as the subway tunnel construction, be substantially all to adopt Shield Construction Technique.Shield Construction Technique utilizes the shield machine tunneling to realize, the cutter of shield machine first digs out native stone and forms the tunnel, then will be the one by one circular-arc prefabricated pipe section of pipe sheet assembling mechanism is mutually near being assembled into the tunnel ring, and shield machine constantly advances, and can consist of continuous tunnel housing.Seal by water-proof strip between section of jurisdiction and section of jurisdiction.The shield machine rear portion is provided with ventral brush, ventral brush and shield machine shield body, section of jurisdiction three consist of the shield deck store, inject a certain amount of grease-filled thing toward the shield deck store, play sealing function between shield structure and section of jurisdiction, prevent that underground water, outer soil, the lining cutting back side slip casting etc. from flowing into the tunnel along the gap, section of jurisdiction, guarantee tunnel piercing safety.Yet, because the ventral brush wear rate is quite high, therefore the extremely easy seepage of shield tail, in order to make up this defective, have to strengthen shield tail grease consumption, with gap, grease-filled section of jurisdiction and shield deck store, and then cause every ring grease amount significantly to rise, according to this toward empirical statistics, serious reach the 200kg/ ring more than, and guarantee fully that in the method that there is no in such cases ventral brush is intact, can't guarantee the tail sealing effect.
Summary of the invention
Purpose of the present invention is for a kind of method of protecting ventral brush, preventing shield tail seepage is provided, its have reduce ventral brush wearing and tearing, shield tail anti-seepage effect good, be easy to implement and characteristics that equipment cost is cheap.
The solution that the present invention solves its technical problem is:
A kind of method of protecting ventral brush, preventing shield tail seepage, it comprises the following steps:
1), after segment prefabricated completing, paste compressible waterproof sealing filler in the gap, section of jurisdiction of two adjacent section of jurisdiction splicing edges;
2), paste compressible waterproof sealing filler in the gap, section of jurisdiction of the section of jurisdiction sides of adjacent two circles, and the section of jurisdiction is spliced into the tunnel ring;
3), shield machine tunnels forward, and toward shield deck store sequencing injection grease, guarantees that in the shield deck store, grease is full.
As further improvement in the technical proposal, described step 1), step 2) before, also comprise precleaning is carried out in section of jurisdiction 1, guarantee the step that compressible waterproof sealing filler can be pasted smoothly.
As further improvement in the technical proposal, the compressible waterproof sealing filler in described step 1) is some high-density foam bars.
As further improvement in the technical proposal, described step 2) the compressible waterproof sealing filler in is some high-density foam bars.
As further improvement in the technical proposal, described high-density foam bar sticks with glue the both sides that agent is pasted on the gap, section of jurisdiction.
As further improvement in the technical proposal, the mode of grease is injected in described sequencing, refer to guarantee in the shield deck store grease full be prerequisite, gradation is injected grease in the shield deck store.
The invention has the beneficial effects as follows: the present invention is by inserting compressible waterproof sealing filler in the gap, section of jurisdiction in tunnel, and grease is injected in sequencing in the shield deck store, on the one hand shutoff the passage that exists due to design structure, prevent shield tail seepage, filler between the gap is avoided the shield tail grease to enter the gap, section of jurisdiction and is caused the meaningless loss of grease and shield tail grease cabin insufficient pressure on the other hand, saves grease amount; Sequencing is controlled grease and is injected, and has controlled to greatest extent grease amount, has improved the utilization rate of grease, thereby reaches the purpose of protecting ventral brush, preventing shield tail seepage.The present invention reduce ventral brush wearing and tearing, shield tail anti-seepage effect good, be easy to implement and equipment cost cheap, be widely used in the middle of the shield-tunneling construction engineering.
Description of drawings
The present invention is further illustrated below in conjunction with drawings and Examples.
Fig. 1 is the present invention when being applied to the Shield digging tunnel, the schematic diagram after constructing tunnel is overlooked, and wherein hollow arrow represents the direction of advance of shield machine, filled arrows represents the flow direction of the seepage liquids such as current, slurries;
Fig. 2 is the A-A sectional view in Fig. 1;
Fig. 3 is the B-B sectional view in Fig. 1, and wherein arrow represents the flow direction of the seepage liquids such as current, slurries;
Fig. 4 is the pattern schematic diagram of the high-density foam bar in the present invention.
The specific embodiment
With reference to Fig. 1～Fig. 4, a kind of method of protecting ventral brush, preventing shield tail seepage, it comprises the following steps:
1), section of jurisdiction 1 is prefabricated complete after, paste compressible waterproof sealing fillers in the gap, section of jurisdiction 3 of two adjacent section of jurisdiction 1 splicing edges;
2), paste compressible waterproof sealing fillers in the gap, section of jurisdiction 3 of section of jurisdiction 1 sides of adjacent two circles, and section of jurisdiction 1 is spliced into the tunnel ring;
3), shield machine tunnels forward, and toward shield deck store 6 sequencing injection greases, guarantees that the interior grease of shield deck store 6 is full.
Be further used as preferred embodiment described step 1), step 2) before, also comprise precleaning is carried out in section of jurisdiction 1, guarantee the step that compressible waterproof sealing filler can be pasted smoothly.
Be further used as preferred embodiment, the compressible waterproof sealing filler in described step 1) is some high-density foam bars 5.
Be further used as preferred embodiment described step 2) in compressible waterproof sealing filler be some high-density foam bars 5.The density of high-density foam is at 35-50kg/m
3Between, therefore can resist larger pressure-acting by it as the high-density foam bar 5 that materials processing forms, and can be not easily deformable, guarantee that filler can by ground water pressure, the compression failure of shield tail grease, not guarantee good filling effect.
Be further used as preferred embodiment, described high-density foam bar 5 sticks with glue the both sides that agent is pasted on gap, section of jurisdiction 3.Due to the step that precleaning is carried out in section of jurisdiction 1 having been arranged before, so by bonding adhesive, can be easily with high-density foam bar 5 firm pastings.Particularly, described high-density foam bar 5 is that cuboid is rectangular, and its sectional dimension is 35mm * 13mm, and namely width is 35mm, and thickness is 13mm, machining accuracy is controlled at ± 1mm within, avoided unfilled corner, the phenomenon such as uneven; Certainly, similar high-density sponge, rubber etc., also alternative high-density foam.
Be further used as preferred embodiment, the mode of grease is injected in described sequencing, is speed and cement mortar injection speed according to the shield machine driving, and full as prerequisite to guarantee shield deck store 6 interior greases, gradation is injected grease in shield deck store 6.Described shield deck store 6 is coated by shield tail 2, shield ventral brush 7 and section of jurisdiction 1.
The below is one embodiment of the present of invention:
1), after prefabricated the completing in the section of jurisdiction 1 in tunnel, section of jurisdiction 1 is cleaned, guarantee section of jurisdiction 1 cleaning surfaces and drying, and guarantee on the side of section of jurisdiction 1 splicing edge, the foreign material such as dust, spot, water are not arranged;
2), coat one-component neoprene-modified phenolic adhesive at high-density foam bar 5 and the side surface in gap, section of jurisdiction 3, require brushing evenly, must not there be holiday to be coated with less, until bonding adhesive is little do after, according to the past high-density foam bar 5 of wherein pasting of the inwall radian in tunnel, 1 outside, outstanding section of jurisdiction must not surpass 2mm, and all gaps all need be inserted;
3), during shield driving, according to the oil loss rule, according to driving speed and slip casting situation, rationally carry out the optimization that grease injects, particularly, be divided into two steps of A and B:
A: when beginning to advance, the first grease injection of shield deck store 6 is 3 minutes at every turn, then shifts the position onto, stops after slip casting grease injection 2 minutes.After driving is to 1.6 meters, in order to prevent from leaking leakage sand, under the prerequisite of guaranteeing greasing pressure, strengthen greasing amount.
B: when entering normal phase of boring, calculate with grease pump 16 strokes/minute, greasing pressure should be greater than 25bar; Grease to the shield deck store 6 that injects carries out reasonable distribution, and the front deck greasing accounts for 80%, rear deck 20%.Particularly, with the 2.0cm/min driving speed time, not greasing advances 6 minutes, and greasing advances 1 minute; 2.5cm/min during driving speed: not greasing advances 6 minutes, and greasing advances 1.5 minutes; 3.0cm/min during driving speed: not greasing advances 5 minutes, and greasing advances 1.5 minutes; When driving speed surpassed 3.5cm/min: not greasing advanced 4 minutes, and greasing advances 2 minutes.
More than that embodiments of the invention are illustrated, but the invention is not limited to described embodiment, those of ordinary skill in the art also can make all equivalent variations or replacement under the prerequisite of the utility model spirit, the modification that these are equal to or replacement all are included in the application's claim limited range.
Claims (3)
1. method of protecting ventral brush, preventing shield tail seepage, it is characterized in that: it comprises the following steps:
1), after prefabricated the completing in section of jurisdiction (1), paste compressible waterproof sealing filler in the gap, section of jurisdiction (3) of adjacent two sections of jurisdiction (1) splicing edge;
2), paste compressible waterproof sealing filler in the gap, section of jurisdiction (3) of section of jurisdiction (1) sides of adjacent two circles, and section of jurisdiction (1) is spliced into the tunnel ring;
3), shield machine tunnels forward, and toward shield deck store (6) sequencing injection grease, guarantees that the interior grease of shield deck store (6) is full;
Described step 1), step 2) before, also comprise section of jurisdiction (1) is carried out precleaning, guarantee the step that compressible waterproof sealing filler can be pasted smoothly; Described step 1) and step 2) in compressible waterproof sealing filler be some high-density foam bars (5).
Protection ventral brush according to claim 1, prevent the method for shield tail seepage, it is characterized in that: described high-density foam bar (5) sticks with glue the both sides that agent is pasted on gap, section of jurisdiction (3).
Protection ventral brush according to claim 1, prevent from the method for shield tail seepage from it is characterized in that: the mode of grease is injected in described sequencing, refers to guarantee that interior the grease of shield deck store (6) is full is prerequisite, gradation injection grease in the shield deck store (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010562557 CN102071950B (en) | 2010-11-24 | 2010-11-24 | Method for protecting shield tail brush and preventing shield tail from seepage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010562557 CN102071950B (en) | 2010-11-24 | 2010-11-24 | Method for protecting shield tail brush and preventing shield tail from seepage |
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| Publication Number | Publication Date |
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| CN102071950A CN102071950A (en) | 2011-05-25 |
| CN102071950B true CN102071950B (en) | 2013-06-26 |
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| CN 201010562557 Active CN102071950B (en) | 2010-11-24 | 2010-11-24 | Method for protecting shield tail brush and preventing shield tail from seepage |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102562081B (en) * | 2012-03-15 | 2013-07-24 | 中交天和机械设备制造有限公司 | Shield tail sealing device for shield machine |
| CN107178373B (en) * | 2017-07-26 | 2019-05-10 | 中铁一局集团有限公司 | A kind of spillage restorative procedure based on the hinged seal structure damage of shield machine |
| CN107387133A (en) * | 2017-08-22 | 2017-11-24 | 华东交通大学 | A kind of shield tunnel outer embrane applies device and its applies method |
| CN110985014A (en) * | 2019-12-10 | 2020-04-10 | 中铁十四局集团隧道工程有限公司 | Method for preventing shield tail leakage |
| CN113931642B (en) * | 2021-11-12 | 2023-06-27 | 中国水利水电第四工程局有限公司 | Temporary treatment method for water and sand leakage of tail of earth pressure balance shield machine |
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| RU2030584C1 (en) * | 1991-10-23 | 1995-03-10 | Акционерное общество открытого типа "Научно-исследовательский институт транспортного строительства" | Method for tunnel concrete lining |
| CN201554470U (en) * | 2009-09-15 | 2010-08-18 | 中铁第四勘察设计院集团有限公司 | Shield tunnel partition water-proof structure |
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| JP3499005B2 (en) * | 1994-08-02 | 2004-02-23 | 日本シビックコンサルタント株式会社 | Tail seal structure and shield method |
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2010
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| RU2030584C1 (en) * | 1991-10-23 | 1995-03-10 | Акционерное общество открытого типа "Научно-исследовательский институт транспортного строительства" | Method for tunnel concrete lining |
| CN201554470U (en) * | 2009-09-15 | 2010-08-18 | 中铁第四勘察设计院集团有限公司 | Shield tunnel partition water-proof structure |
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| 上海地铁6号线区间防水技术浅析;温竹茵等,1;《中国建筑防水》;20060820(第08期);第21-24页 * |
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| CN102071950A (en) | 2011-05-25 |
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Address after: 510220 Guangdong city of Guangzhou province Haizhuqu District Yue Xuan Street No. 81 (G-3) 1501-1512, 1604-1607 room Patentee after: Guangdong Hua Qiao construction group Limited by Share Ltd Address before: 510635 No. 559 Tianhe North Road, Guangdong, Guangzhou 1802-1805 Patentee before: China Tunnel Construction Co., Ltd. Guangdong |