CN109630144B - Method for replacing two shield tail brush rings of shield tunneling machine for water-rich stratum tunnel construction - Google Patents
Method for replacing two shield tail brush rings of shield tunneling machine for water-rich stratum tunnel construction Download PDFInfo
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- CN109630144B CN109630144B CN201811479487.0A CN201811479487A CN109630144B CN 109630144 B CN109630144 B CN 109630144B CN 201811479487 A CN201811479487 A CN 201811479487A CN 109630144 B CN109630144 B CN 109630144B
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- 230000005641 tunneling Effects 0.000 title claims abstract description 56
- 238000010276 construction Methods 0.000 title claims abstract description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000002002 slurry Substances 0.000 claims description 16
- 230000002093 peripheral effect Effects 0.000 claims description 14
- 238000003466 welding Methods 0.000 claims description 10
- 239000004519 grease Substances 0.000 claims description 9
- 238000001556 precipitation Methods 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 229920002635 polyurethane Polymers 0.000 claims description 4
- 239000004814 polyurethane Substances 0.000 claims description 4
- 230000000712 assembly Effects 0.000 claims description 3
- 238000000429 assembly Methods 0.000 claims description 3
- 239000004568 cement Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 239000004570 mortar (masonry) Substances 0.000 claims description 3
- 235000019353 potassium silicate Nutrition 0.000 claims description 3
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 3
- 230000009466 transformation Effects 0.000 claims description 3
- 239000003673 groundwater Substances 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 4
- 230000008569 process Effects 0.000 description 6
- 238000007789 sealing Methods 0.000 description 5
- 239000004576 sand Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009435 building construction Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
- E21D9/0635—Tail sealing means, e.g. used as end shuttering
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a method for replacing two shield tail brush rings of a shield tunneling machine for water-rich stratum tunnel construction, which comprises the following steps: 1) the method comprises the following steps of (1) carrying out water stop treatment on a duct piece for supporting a tunnel, 2) reducing the underground water level in the range of an air shaft, 3) advancing forward by a shield machine to expose two shield tail brush rings which need to be replaced at the tail part of the shield machine, and 4) removing the old shield tail brush ring and replacing a new shield tail brush ring. The invention fills the construction technical blank of replacing two shield tail brushes in the water-rich weak stratum, and has good economic and social benefits. The limit that only one shield tail brush at the tail part of the shield tunneling machine can be replaced in the prior art is broken through, two shield tail brushes can be replaced simultaneously, the tunnel tunneling construction efficiency is improved, safety guarantee is provided, and the technical problem of shield tail safety in long-distance shield tunneling construction is solved. Still solved the tunnel waterproof problem of cominging in and going out the air shaft mouth to guarantee the security of changing shield tail brush operation environment, accomplish the construction operation of changing the shield tail brush sooner better.
Description
Technical Field
The invention relates to a method for replacing a tail sealing device of a shield tunneling machine for underground water-rich stratum tunnel construction, in particular to a method for replacing a tail brush ring of the tail of the shield tunneling machine, and belongs to the technical field of underground building construction.
Background
With the continuous development and improvement of the shield machine and the construction technology thereof, the shield construction method also becomes an indispensable construction method in the current urban tunnel and subway engineering. However, when a tunnel is constructed in a large city, difficulties caused by city complexity, diversity of underground buildings and pipelines, instability of strata and the like are faced, when a shield machine in the tunnel passes through the complex terrain, a longer line with a small curvature radius is needed, and the shield tail brush sealing effect at the tail part of the shield machine is greatly examined. As shown in fig. 2 and fig. 3, three annular shield tail brush rings 20 are fixed at intervals in the shield shell 101 at the tail of the shield machine, and each shield tail brush ring 20 is formed by splicing a plurality of shield tail brush blocks 201. When the shield machine 10 is tunneling, the three shield tail brush rings 20 are used for sealing a gap between the periphery of a ring body 30 which is extended into the shield machine tail shield shell 101 and is formed by a plurality of segments 301 and the inner wall of the shield machine tail shield shell 101, so as to prevent water and silt in the stratum from entering the shield machine 10. Under the severe working condition that underground tunneling sediment is mixed, after the shield tunneling machine 10 tunnels underground for a certain distance, the shield tail brush ring 20 is seriously damaged and needs to be replaced in time. The conventional method for replacing the shield tail brush is to replace one shield tail brush ring 20, or replace the shield tail brush in a shallow buried conventional stratum and reserve the two rear shield tail brush rings 20, so as to maintain the sealing performance of the three shield tail brush rings 20.
Because the shallow conventional stratum has good stratum conditions with deeper underground water, the occurrence of water burst and sand burst is reduced, and the risk of replacing the shield tail brush is greatly reduced. In the construction process of firstly tunneling and then tunneling, namely firstly tunneling a tunnel by using a shield machine and then excavating a vertical air shaft, when the shield machine needs to replace a shield tail brush ring in the process of tunneling a water-rich sand layer, a tunnel inlet and outlet air well mouth needs to be reinforced and sealed firstly and then the shield tail brush ring needs to be replaced, the construction process is complicated, the cost is high, and the tunneling period of the shield machine can be influenced; and only one protective action of the shield tail brush ring exists at the moment, and the risk of large leakage and gushing exists in the process of replacing the shield tail brush ring.
Disclosure of Invention
The invention aims to provide a construction method for replacing two shield tail brush rings of a shield tunneling machine in a water-rich sand layer in an air shaft, which can replace the two shield tail brush rings simultaneously and improve the construction efficiency.
The invention is realized by the following technical scheme:
a method for replacing two shield tail brush rings of a shield tunneling machine for water-rich stratum tunnel construction comprises the following steps:
1) water stopping treatment is carried out on pipe piece for supporting soil body before two shield tail brush rings are replaced
After the shield machine reaches a preset position, performing water-stopping grouting construction between the outer peripheral surfaces of the 10 annular pipe pieces and the inner wall of the stratum, which are constructed and connected with each other, at the tail part of the shield machine;
2) lowering the ground water level in the range of the air shaft
Constructing a plurality of precipitation wells within the range of the air shaft to be constructed for precipitation;
3) two shield tail brush rings for shield tunneling machine to advance and expose tail part of shield tunneling machine to be replaced
The segments are adjacently installed and fixed on the lower semicircle of the inner wall of the shield shell at the tail part of the shield machine one by one to form a semicircular lower semicircle segment assembly; then selecting a plurality of horizontal supporting oil cylinders at intervals at the upper part from a circle of a plurality of horizontal supporting oil cylinders at the tail part of the shield tunneling machine, enabling piston rod end assemblies of the horizontal supporting oil cylinders to be supported on the end surfaces of the segments at corresponding positions through corresponding auxiliary supporting rods respectively, and providing tunneling counter force for the shield tunneling machine by using a lower semicircular segment at the bottom and the upper supporting oil cylinders; the shield machine continues to drive and expose two shield tail brush rings to be replaced;
4) old shield tail brush ring is dismantled and new shield tail brush ring is changed
4.1) removing grease and mortar on the inner peripheral surface of the upper semicircle of the shield shell at the tail part of the shield machine, a grease bin and two old shield tail brushes to be removed, then alternately replacing the supporting positions of a plurality of horizontal supporting oil cylinders and corresponding auxiliary supporting rods in the upper semicircle of the shield shell at the tail part of the shield machine, and freeing corresponding areas to remove a plurality of shield tail brush blocks at corresponding positions; secondly, adjacent edges of a plurality of new shield tail brush blocks are respectively welded and fixed on original positions of two old shield tail brushes with the shield shell on the tail part of the shield tunneling machine removed in an assembling mode to form semicircular combination blocks of the two new shield tail brushes; after a plurality of times of alternate transformation of the support positions of the horizontal support oil cylinders and the corresponding auxiliary support rods and the welding and fixing of the semicircular combination blocks at the corresponding positions, the dismantling of two old shield tail brushes and the welding and fixing of the semicircular combination blocks of two new shield tail brushes in the semicircular inner peripheral area on the shield shell at the tail part of the shield machine are completed;
4.2) supporting a plurality of symmetrically arranged horizontal supporting oil cylinders in the upper semicircle of the shield shell at the tail part of the shield machine on the segment end surfaces at corresponding positions through respective corresponding auxiliary supporting rods, and using an assembling machine to disassemble a plurality of segments of the lower semicircle of the inner wall of the outer tunnel at the tail part of the shield machine for a plurality of times according to the symmetrical positions at two sides of the inner wall of the tunnel; then, respectively welding and fixing adjacent edges of a plurality of new shield tail brush blocks on the original positions of two old shield tail brushes which are removed from the inner peripheral surface of the lower semicircle of the shield shell at the tail part of the shield machine in an assembling manner; the two new shield tail brush blocks are respectively welded and fixed on the upper and lower semicircles of the inner peripheral surface of the shield shell at the tail part of the shield machine to form two new shield tail brush rings which are arranged at intervals, and grease is applied to the two new shield tail brush rings.
The object of the invention is further achieved by the following technical measures.
Further, in the water stopping and grouting construction of the 10 ring pipe pieces connected with each other in the step 1), polyurethane slurry is adopted for stopping water between the outer circle of one ring pipe piece outside the tail part of the shield machine and the stratum, and the rest 9 rings are all stopped by double-slurry; the double-liquid slurry is a mixture of cement slurry and water glass slurry.
Further, the depth of the dewatering well in the step 2) exceeds the distance from the lower side surface of the shield tunneling machine to the ground elevation.
Further, the auxiliary supporting rod in the step 4.1) is a steel structural member formed by welding vertical end panels at two ends and a horizontal round steel pipe in the middle.
The invention fills the construction technical blank of replacing two shield tail brushes in a water-rich weak stratum, has good economic benefit and social benefit, overcomes the difficulty brought to tunnel construction due to the complexity of a large city, the diversity of underground buildings and pipelines and the instability of the stratum, and provides safety guarantee and a construction technical method for slurry leakage and water leakage of a shield shell at the tail part of a shield tunneling machine during tunnel construction of the weak stratum. The invention breaks through the limitation that only one shield tail brush at the tail part of the shield tunneling machine can be replaced in the prior art, can simultaneously replace two shield tail brushes, improves the construction efficiency of tunnel tunneling, provides safety guarantee, and particularly solves the technical problem of shield tail safety in shield tunneling construction for a longer distance. The invention adopts various grouting measures and reasonable grouting sequence to carry out water stop grouting construction between the outer peripheral surfaces of the 10 annular pipe pieces which are constructed and connected with each other and the stratum after the tail part of the shield machine, and measures for additionally arranging a precipitation well in an unearthed air shaft to carry out precipitation, thereby solving the waterproof problem of the air shaft port for the entrance and exit of the tunnel, ensuring the safety of the operation environment for replacing the shield tail brush and leading the construction operation for replacing the shield tail brush to be completed more quickly and better.
Advantages and features of the present invention will be illustrated and explained by the following non-restrictive description of preferred embodiments thereof, given by way of example only with reference to the accompanying drawings.
Drawings
FIG. 1 is a flow chart of the present invention;
FIG. 2 is a schematic diagram of two shield tail brushes exposed at the tail of the shield tunneling machine;
FIG. 3 is a top view of the locations of the air shaft and precipitation well that have not yet been excavated in the ground of the tunnel being tunneled by the shield tunneling machine;
FIG. 4 is a process diagram of step 4) of the present invention;
fig. 5 is a schematic structural view of the auxiliary supporting rod of the present invention.
Detailed Description
The invention will be further explained with reference to the attached drawings and engineering examples of the construction of the double-line tunnel between the Yanzhuang station and the lake surge station of the Foshan subway No. 2 line.
As shown in fig. 3, the length of the line between the south village station and the lake gush station of the Foshan subway No. 2 is 2.29km (left line), the whole line passes through the river channel, the high-pressure gas, the high-pressure line tower, the building group, the Guangming high speed and the like, and the air shaft 40 is arranged in the middle of the tunnel and is also used as a 3# communication channel. The construction process adopts a mode of constructing the tunnel 100 firstly and then constructing the air shaft 40, wherein the position of the air shaft 40 is the most favorable position of the whole line condition in the south lake region, the slurry leakage phenomenon at the tail part of the shield machine 10 occurs when the shield machine 10 tunnels to the left and right of the ring body 30 marked as 442 rings, the damage of the shield tail brush ring 20 is preliminarily judged, the leakage is stopped by measures of sealing polyurethane at the tail part of the shield machine 10, increasing the grease injection quantity at the tail part of the shield machine 10 and the like, and the replacement point of the shield tail brush 20 nearest to the shield machine 10 in the fault tunneling, namely the ring body 30 is marked as 528 ring (hereinafter referred to as 528.
As shown in fig. 1 and 2, the method of the present invention comprises the following steps:
1) before replacing two shield tail brush rings 20, water stopping treatment is carried out on duct piece 301 for supporting tunnel 100
As shown in fig. 2, after the shield tunneling machine 10 reaches a predetermined position, water stopping and grouting construction is performed between the outer circumferential surfaces of the 10 ring segments 301(518-527 rings) which are constructed at the rear of the shield tunneling machine 10 and are connected with each other and the stratum. Polyurethane is adopted to stop water between the outer circle of the 527 ring pipe sheet 301 outside the tail part of the shield machine 10 and the stratum, and the rest 9 rings are stopped water by double-slurry; the double-liquid slurry is a mixture of cement slurry and water glass slurry.
2) Lowering the water table within the confines of the air shaft 40
As shown in fig. 3, 4 dewatering wells 401 are constructed in the range of the air shaft 40 to be constructed for dewatering, the depth of the dewatering well 401 exceeds the distance from the lower side surface of the shield machine 10 to the ground elevation by 28.8 meters, the underground water level of the construction surface of the tunnel 100 can be effectively reduced, and the construction conditions can be improved.
3) The shield machine 10 advances to drive and expose two shield tail brush rings 20 which need to be replaced at the tail part of the shield machine 10
The segments 301 are adjacently mounted and fixed one by one on the lower semicircle of the inner wall of the shield shell at the tail of the shield tunneling machine 10 to form a semicircular lower semicircle segment assembly 301A. Then, in a circle of 16 horizontal supporting oil cylinders 102 on the periphery of the tail of the shield tunneling machine 10 shown in fig. 2 and a of fig. 4, selecting 3 upper spaced horizontal supporting oil cylinders 102, which are respectively marked as 1, 3 and 15, and enabling the piston rod end assemblies 103 of the horizontal supporting oil cylinders 102 to be respectively supported on the end faces of the three segments 301 at corresponding positions through the corresponding auxiliary supporting rods 50 which are respectively welded by the vertical end panels 501 at the two ends and the horizontal round steel tubes 502 in the middle as shown in fig. 5; the shield tunneling machine 10 continues to tunnel two shield tail brush rings 20 that need to be replaced.
4) Removing old tail brush and replacing new tail brush
4.1) firstly removing grease and mortar on the inner circumferential surface of the semicircle on the shield shell 101 at the tail part of the shield machine, the grease bin and two old shield tail brushes to be detached, then, as shown in fig. 4B to 4H, the 2 spaced horizontal support cylinders 102 (fig. 4B) marked with 1 and 3, respectively, the 3 and 15 (fig. 4C), the 1 and 15 (fig. 4D), and the 1, 3 and 15 (fig. 4E) are alternately replaced in sequence, 2 or 3 spaced horizontal support cylinders 102 are arranged at different intervals, the partial area of the semicircle on the tail shield shell 101 of the shield tunneling machine is left for cleaning and removing the corresponding tail shield blocks 201, and then, adjacent edges of a plurality of new shield tail brush blocks are respectively welded and fixed on the original positions of two old shield tail brushes with the shield shell 101 at the tail part of the shield tunneling machine removed in an assembling way, so that semicircular combination blocks of the two new shield tail brushes are formed. After 2-3 times of alternate change of the support positions of the horizontal support oil cylinders 102 and the corresponding auxiliary support rods 50 and welding and fixing of the semicircular combination blocks of the new shield tail brushes at the corresponding positions, the dismantling of two old shield tail brush rings and the welding and fixing of the semicircular combination blocks of the two new shield tail brushes in the upper semicircular inner peripheral surface area of the shield shell 101 at the tail part of the shield machine are completed.
4.2) according to F of figure 4 to H of figure 4, 3 horizontal supporting oil cylinders 102 marked as 1, 3 and 15 in the upper semicircle of the shield shell 101 at the tail part of the shield machine are respectively supported on the end face of the segment 301 at the corresponding position through the corresponding auxiliary supporting rods 50. According to the symmetrical positions of the two sides of the inner wall of the tunnel 100, firstly, removing the duct piece 301 at the position A1 on the left side by using an erector, as shown in F of fig. 4; segment 301 at right side a3 is then removed, as shown at G in fig. 4; finally, segment 301 at the lowermost position, position a2, is removed as shown at H in fig. 4. Thus, the lower semi-circular 3 segments 301 in the tail of shield tunneling machine 10 are removed in 3 passes. Then, adjacent edges of a plurality of new shield tail brush blocks are respectively welded and fixed on the original positions of two old shield tail brushes which are removed from the inner peripheral surface of the lower semicircle of the shield shell 101 at the tail part of the shield machine in an assembling way; the two new shield tail brush blocks are respectively welded and fixed on the upper and lower semicircles of the inner peripheral surface of the shield shell 101 at the tail part of the shield machine to form two new shield tail brush rings 20 which are arranged at intervals. And (4) greasing the hands on the two new shield tail brush rings 20 to finish the replacement of the two shield tail brush rings 20.
In addition to the above embodiments, the present invention may have other embodiments, and any technical solutions formed by equivalent substitutions or equivalent transformations fall within the scope of the claims of the present invention.
Claims (5)
1. A method for replacing two shield tail brush rings by a shield machine for water-rich stratum tunnel construction is characterized by comprising the following steps:
1) carry out stagnant water treatment to a section of jurisdiction that is used for supporting tunnel before changing two shield tail brush rings
After the shield machine reaches a preset position, performing water stopping and grouting construction between the outer peripheral surfaces of the 10 annular pipe pieces and the stratum, which are constructed and connected with each other, at the tail part of the shield machine;
2) lowering the ground water level in the range of the air shaft
Constructing a plurality of precipitation wells within the range of the air shaft to be constructed for precipitation;
3) two shield tail brush rings for shield tunneling machine to advance and expose tail part of shield tunneling machine to be replaced
The segments are adjacently installed and fixed on the lower semicircle of the inner wall of the shield shell at the tail part of the shield machine one by one to form a semicircular lower semicircle segment assembly; then selecting a plurality of horizontal supporting oil cylinders at intervals at the upper part from a circle of a plurality of horizontal supporting oil cylinders at the tail part of the shield tunneling machine, enabling piston rod end assemblies of the horizontal supporting oil cylinders to be supported on the end surfaces of the segments at corresponding positions through corresponding auxiliary supporting rods respectively, and providing tunneling counter force for the shield tunneling machine by using a lower semicircular segment at the bottom and the upper supporting oil cylinders; the shield machine continues to drive and expose two shield tail brush rings to be replaced;
4) old shield tail brush ring is dismantled and new shield tail brush ring is changed
4.1) removing grease and mortar on the inner peripheral surface of a semicircle on the tail shell of the shield tunneling machine, a grease bin and two old shield tail brush rings to be removed, then alternately replacing the supporting positions of a plurality of horizontal supporting oil cylinders and corresponding auxiliary supporting rods in the semicircle on the tail shell of the shield tunneling machine, and leaving out corresponding areas to remove a plurality of shield tail brush ring blocks at corresponding positions; secondly, respectively welding and fixing adjacent edges of a plurality of new shield tail brush ring blocks on the original positions of two old shield tail brush rings with the tail shell of the shield tunneling machine removed in a splicing manner to form semicircular combination blocks of the two new shield tail brush rings; the method comprises the following steps that two old shield tail brush rings and two new shield tail brush semicircular combination blocks are removed from the inner peripheral surface area of a semicircle on the tail shell of the shield machine through the alternate transformation of a plurality of horizontal supporting oil cylinders and the supporting positions of corresponding auxiliary supporting rods and the welding and fixing of the new shield tail brush semicircular combination blocks at corresponding positions;
4.2) supporting a plurality of symmetrically arranged horizontal supporting oil cylinders in the upper semicircle of the tail shell of the shield tunneling machine on the segment end surfaces at corresponding positions through respective corresponding auxiliary supporting rods, and using an assembling machine to disassemble a plurality of segments of the lower semicircle in the tail of the shield tunneling machine for a plurality of times according to the symmetrical positions at two sides of the inner wall of the tunnel; then, respectively welding and fixing adjacent edges of a plurality of new shield tail brush ring blocks on the original positions of two old shield tail brush rings which are removed from the inner peripheral surface of the lower semicircle of the tail shell of the shield machine in an assembling manner; and the two new shield tail brush ring blocks are respectively welded and fixed on the upper and lower semicircles of the inner peripheral surface of the tail shell of the shield machine to form two new shield tail brush ring rings which are arranged at intervals, and grease is applied to the two new shield tail brush rings.
2. The method for replacing two shield tail brush rings by the shield tunneling machine for water-rich stratum tunnel construction according to claim 1, wherein the method comprises the following steps: in the step 1), in the water stopping and grouting construction of the 10-ring pipe pieces connected with each other, polyurethane slurry is adopted for stopping water between the outer circle of the pipe piece close to the 1 st ring at the tail part of the shield tunneling machine and the stratum, and the rest 9 rings adopt double-slurry water stopping.
3. The method for replacing two shield tail brush rings by the shield tunneling machine for water-rich stratum tunnel construction according to claim 2, characterized in that: the double-liquid slurry is a mixture of cement slurry and water glass slurry.
4. The method for replacing two shield tail brush rings by the shield tunneling machine for water-rich stratum tunnel construction according to claim 1, wherein the method comprises the following steps: and 2) the depth of the dewatering well exceeds the distance from the lower side surface of the shield tunneling machine to the ground elevation.
5. The method for replacing two shield tail brush rings by the shield tunneling machine for water-rich stratum tunnel construction according to claim 1, wherein the method comprises the following steps: the auxiliary supporting rod in the step 4.1) is a steel structural member formed by welding vertical end panels at two ends and a horizontal round steel pipe in the middle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811479487.0A CN109630144B (en) | 2018-12-05 | 2018-12-05 | Method for replacing two shield tail brush rings of shield tunneling machine for water-rich stratum tunnel construction |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811479487.0A CN109630144B (en) | 2018-12-05 | 2018-12-05 | Method for replacing two shield tail brush rings of shield tunneling machine for water-rich stratum tunnel construction |
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| CN109630144A CN109630144A (en) | 2019-04-16 |
| CN109630144B true CN109630144B (en) | 2020-07-07 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110067565A (en) * | 2019-05-16 | 2019-07-30 | 中铁十二局集团有限公司 | A method of acting on exchanging shield ventral brush in rich water sandy silt soil stratum shield-tunneling construction |
| CN110541722B (en) * | 2019-09-30 | 2024-07-23 | 中铁第四勘察设计院集团有限公司 | Method for locally dismantling shield tunnel segments in middle wind shaft and water stopping structure |
| CN110757397B (en) * | 2019-11-15 | 2021-08-13 | 沪东中华造船(集团)有限公司 | Method for replacing box body top plate of large pin wheel supporting ring of gantry crane |
| CN111350515A (en) * | 2020-05-09 | 2020-06-30 | 徐州工程学院 | Shield head structure for effectively controlling surface settlement |
| CN114017068A (en) * | 2021-11-23 | 2022-02-08 | 中交第一公路勘察设计研究院有限公司 | Reinforcing structure and reinforcing method for shield tail construction of river-crossing tunnel shield machine |
| CN114033400B (en) * | 2021-11-25 | 2023-06-30 | 中铁隧道局集团有限公司 | Shield tail mechanism capable of replacing all shield tail brushes in hole and method for replacing shield tail brushes |
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| JPH08218783A (en) * | 1995-02-17 | 1996-08-27 | Kajima Corp | Exchange method of tail seal in shield machine |
| JP3228686B2 (en) * | 1996-11-05 | 2001-11-12 | 鹿島建設株式会社 | Emergency waterproofing device for shield machine tail seal |
| JP2000220386A (en) * | 1999-02-03 | 2000-08-08 | Shimizu Corp | Shield excavator |
| JP2002021486A (en) * | 2000-07-05 | 2002-01-23 | Taisei Corp | Tail bush replacing device and replacing method for shield machine |
| JP4478122B2 (en) * | 2006-05-10 | 2010-06-09 | 東北大島工業株式会社 | Sealing device for foldable shield machine |
| CN101251015B (en) * | 2008-04-02 | 2010-06-09 | 上海隧道工程股份有限公司 | Construction method for exchanging shield ventral brush |
| CN102242633B (en) * | 2011-07-23 | 2013-07-03 | 中铁十二局集团有限公司 | Method for replacing tail brush in extra large diameter shield driving under high water pressure condition |
| CN107035378B (en) * | 2017-05-25 | 2019-04-16 | 上海隧道工程有限公司 | The method of super-large-diameter shield machine exchanging shield ventral brush under high hydraulic condition |
| CN107387101A (en) * | 2017-09-19 | 2017-11-24 | 五邑大学 | The exchanging shield ventral brush method of shield machine |
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| CN109630144A (en) | 2019-04-16 |
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