CN113187491A - Subway tunnel transverse passage small shield construction process - Google Patents
Subway tunnel transverse passage small shield construction process Download PDFInfo
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- CN113187491A CN113187491A CN202110534618.6A CN202110534618A CN113187491A CN 113187491 A CN113187491 A CN 113187491A CN 202110534618 A CN202110534618 A CN 202110534618A CN 113187491 A CN113187491 A CN 113187491A
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- 238000000034 method Methods 0.000 title claims abstract description 43
- 238000010276 construction Methods 0.000 title claims abstract description 28
- 230000005641 tunneling Effects 0.000 claims abstract description 27
- 229910000278 bentonite Inorganic materials 0.000 claims description 16
- 239000000440 bentonite Substances 0.000 claims description 16
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 239000003365 glass fiber Substances 0.000 claims description 6
- 230000003014 reinforcing effect Effects 0.000 claims description 6
- 239000002689 soil Substances 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000004568 cement Substances 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 239000004519 grease Substances 0.000 claims description 3
- 239000011435 rock Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000002893 slag Substances 0.000 claims description 3
- 239000002002 slurry Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000009412 basement excavation Methods 0.000 abstract description 10
- 238000005516 engineering process Methods 0.000 abstract description 4
- 239000004576 sand Substances 0.000 description 4
- 230000002787 reinforcement Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/08—Lining with building materials with preformed concrete slabs
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
- E21D11/105—Transport or application of concrete specially adapted for the lining of tunnels or galleries ; Backfilling the space between main building element and the surrounding rock, e.g. with concrete
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/001—Improving soil or rock, e.g. by freezing; Injections
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/0607—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield being provided with devices for lining the tunnel, e.g. shuttering
Abstract
A small shield construction process for a transverse channel of a subway tunnel mainly uses a small shield machine, after a tunnel in a subway shield zone is run through, all trolleys of the small shield machine are hoisted to a well through a station or a vertical shaft according to an assembly sequence, a battery truck group is used underground, all trolleys of the small shield machine are transported to a transverse channel construction part for assembly and debugging, after debugging is completed, after a transverse channel opening is reinforced, shield tunneling is performed, and after tunneling is completed, next transverse channel construction is performed. The small shield technology is adopted to replace a mine method, the subway shield tunnel transverse passage construction is carried out, and the method has the advantages of high safety, high excavation speed and the like.
Description
Technical Field
The invention relates to the field of subway tunnel construction, in particular to a small shield construction process for a subway tunnel cross passage.
Background
A transverse channel of a rescue channel is designed in an urban subway tunnel, and in the traditional transverse channel construction, the soil body in the excavation range of the transverse channel is reinforced by adopting the processes of a freezing method, ground reinforcement and the like, then the excavation is carried out by a mine method, and finally the second lining construction is carried out. If the process meets unstable strata, the water content and the sand content are large, the reinforcement is needed, the reinforcement cost is high, and the safety risk of water inrush and mud inrush also exists during excavation.
Disclosure of Invention
In order to solve the defects of the prior art, the invention aims to provide a small shield construction process for a transverse channel of a subway tunnel. The small shield technology is adopted to replace mine underground excavation, the subway shield tunnel transverse passage construction is carried out, the safety is high, the excavation speed is high, and the like, and the method is a trend of development of the subway tunnel transverse passage construction technology. The invention has the characteristics of safety, high efficiency and the like, can reduce the labor intensity of workers, realizes uninterrupted cycle operation and improves the construction efficiency.
In order to achieve the purpose, the invention adopts the technical scheme that:
a construction process of a small shield of a transverse channel of a subway tunnel comprises the following steps:
s1, measuring a segment (3) of a main tunnel in advance, producing a special segment (16) with the same size of a reserve main tunnel, when a shield machine digs to the position of a transverse channel of the main tunnel, splicing the special segment (16) instead of a common segment, using a grouting machine to perform cement grouting (16-2) in surrounding rocks through grouting holes (16-1) arranged on the special segment (16), and reinforcing the inlet and the outlet of the transverse channel;
s2, installing trolleys of the small shield and a trolley (7) of the return force supporting system in a certain sequence by using a vertical shaft and a crane, hoisting the trolleys to a well, and carrying the trolleys to a transverse passage position by using a storage battery transport vehicle (13) for assembling and debugging;
s3, installing and adjusting a lower supporting shoe (7-1), a vertical oil cylinder (7-2), a traveling wheel (7-3), a horizontal telescopic oil cylinder (7-4), a rear supporting shoe (7-5), an upper supporting shoe (7-6) and a propulsion oil cylinder (7-7) of a return force supporting system trolley (7) according to the position and elevation of a transverse channel, installing a starting sleeve box (1) at the inlet of the transverse channel, and installing a receiving sleeve box (2) at the outlet position to realize the totally-closed small shield tunneling process;
s4, injecting grease into the starting pouring jacket (1) until the starting pouring jacket is full, establishing certain internal pressure to enable the pressure value to be consistent with the calculated soil pressure, and checking the sealing performance of the shield body of the small shield and the starting pouring jacket (1) to ensure that leakage is not caused;
s5, starting tunneling by the small shield, and breaking the segment at the starting end by the blade (6), wherein in the tunneling process, the method comprises the following steps:
s5-1, excavating and jacking;
s5-2, discharging slag;
s5-3, grouting and reducing friction;
s5-4, measuring and correcting deviation;
s5-5, performing tunneling in a segment assembling process, and strictly controlling tunneling parameters in the tunneling process;
s6, before the receiving end pipe piece is excavated and broken, filling muck into the receiving sleeve box (2), and filling and maintaining pressure;
and S7, tunneling to break the receiving end pipe piece, and entering the receiving sleeve box (2). And (3) performing water stopping and grouting operation from the transverse passage to the receiving end tunnel opening by using a grouting pump, ensuring that the tunnel opening is well sealed, removing the receiving sleeve box (2) after no leakage exists, and finally removing the shield machine and transporting the shield machine to the outside of the tunnel.
The small shield is a slurry balance shield machine and comprises a shield body host (5), a bentonite trolley (8), a segment hoisting trolley (9), a control trolley (10), a hydraulic pump station trolley (11) and an electrical equipment trolley (12), wherein the shield body is hinged in an active hinge mode, and a cutter head (6) is driven by a variable frequency motor.
The battery truck group consists of a battery truck traction machine head (13), a mud tank (14) and a tank section transport vehicle (15).
A vertical oil cylinder (7-2) arranged on the return force support system trolley (7) is mainly used for adjusting the horizontal elevation of the trolley; the horizontal telescopic oil cylinder (7-4) is used for fixing the back support shoe (7-5); the thrust oil cylinder (7-7) is used for pushing shield tunneling.
The special segment (16) consists of a steel structure part (16-3) and a glass fiber concrete part (16-4), and the glass fiber concrete part (16-4) is used for being broken by the cutter head (6).
The limit lifting capacity of a crane (9-1) on the segment lifting trolley (9) is 3 tons plus 3 tons, and the control mode is handle control plus remote control.
And (3) performing the bin filling and pressure maintaining on the starting pouring jacket (1) in the step (S4) and the receiving pouring jacket (2) in the step (S6), checking the plugging effect, repairing leaks in time, and performing the bin filling and pressure maintaining again after the repairing is finished.
And (S5-3) grouting to reduce friction, stirring bentonite by using a bentonite trolley (8), and pumping the bentonite out of the shield body (5) and to the back of the duct piece (4) by using a bentonite pump through a pipeline, so that the friction resistance of the movement of the shield body and the duct piece is reduced.
The invention has the beneficial effects that:
the invention provides a small shield construction process for a subway tunnel transverse passage, which can solve the problem of urban subway tunnel transverse passage, and comprises the steps of reinforcing a soil body in the excavation range of the transverse passage by adopting processes such as a freezing process, a ground reinforcing process and the like, excavating by a mine method and finally constructing a second lining. When the water-bearing sand-bearing geology meets unstable stratum and has large water-bearing sand content, the water-bearing sand-bearing geology needs to be reinforced, the reinforcing cost is high, and the problem of safety risk of water gushing and mud gushing exists during excavation. The small shield technology is adopted to replace mine underground excavation, the subway shield tunnel transverse passage construction is carried out, and the method has the advantages of high safety, high excavation speed and the like. The invention has the characteristics of safety, high efficiency and the like, can reduce the labor intensity of workers, realizes uninterrupted cycle operation and improves the construction efficiency.
Drawings
FIG. 1 is a schematic flow chart of the present invention.
Fig. 2 is a diagram of the apparatus layout of the present invention.
FIG. 3 is a front view of the reaction support system of the present invention.
FIG. 4 is a side view of the reaction support system of the present invention.
Fig. 5 is a tunneling construction drawing of the present invention.
Fig. 6 is a diagram of a tailored tube sheet according to the invention.
Wherein, 1 is a starting sleeve box, 2 is a receiving sleeve box, 3 is a main hole pipe piece, 4 is a transverse channel pipe piece, 5 is a shield body, 6 is a cutter head, 7 is a return force supporting system trolley, 8 is a bentonite trolley, 9 is a pipe piece hoisting trolley, 10 is a control trolley, 11 is a hydraulic pump station trolley, 12 is an electrical equipment trolley, 13 is a storage battery transport vehicle, 14 is a mud tank, 15 is a tank section transport vehicle, and 16 is a special pipe piece.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
As shown in fig. 1, a construction process of a small shield of a transverse channel of a subway tunnel comprises the following steps:
s1, measuring a segment (3) of a main tunnel in advance, producing a special segment (16) with the same size of a reserve main tunnel, when a shield machine digs to the position of a transverse channel of the main tunnel, splicing the special segment (16) instead of a common segment, using a grouting machine to perform cement grouting (16-2) in surrounding rocks through grouting holes (16-1) arranged on the special segment (16), and reinforcing the inlet and the outlet of the transverse channel;
s2, installing trolleys of the small shield and a trolley (7) of the return force supporting system in a certain sequence by using a vertical shaft and a crane, hoisting the trolleys to a well, and carrying the trolleys to a transverse passage position by using a storage battery transport vehicle (13) for assembling and debugging;
s3, installing and adjusting a lower supporting shoe (7-1), a vertical oil cylinder (7-2), a traveling wheel (7-3), a horizontal telescopic oil cylinder (7-4), a rear supporting shoe (7-5), an upper supporting shoe (7-6) and a propulsion oil cylinder (7-7) of a return force supporting system trolley (7) according to the position and elevation of a transverse channel, installing a starting sleeve box (1) at the inlet of the transverse channel, and installing a receiving sleeve box (2) at the outlet position to realize the totally-closed small shield tunneling process;
s4, injecting grease into the starting pouring jacket (1) until the starting pouring jacket is full, establishing certain internal pressure to enable the pressure value to be consistent with the calculated soil pressure, and checking the sealing performance of the shield body of the small shield and the starting pouring jacket (1) to ensure that leakage is not caused;
s5, starting tunneling by the small shield, and breaking the segment at the starting end by the blade (6), wherein in the tunneling process, the method comprises the following steps:
s5-1, excavating and jacking;
s5-2, discharging slag;
s5-3, grouting and reducing friction;
s5-4, measuring and correcting deviation;
s5-5, performing tunneling in a segment assembling process, and strictly controlling tunneling parameters in the tunneling process;
s6, before the receiving end pipe piece is excavated and broken, filling muck into the receiving sleeve box (2), and filling and maintaining pressure;
and S7, tunneling to break the receiving end pipe piece, and entering the receiving sleeve box (2). And (3) performing water stopping and grouting operation from the transverse passage to the receiving end tunnel opening by using a grouting pump, ensuring that the tunnel opening is well sealed, removing the receiving sleeve box (2) after no leakage exists, and finally removing the shield machine and transporting the shield machine to the outside of the tunnel.
The small shield is a slurry balance shield machine which comprises a shield body host (5), a bentonite trolley (8), a segment hoisting trolley (9), a control trolley (10), a hydraulic pump station trolley (11) and an electrical equipment trolley (12), wherein the shield body is hinged in an active hinge mode, and a cutter head (6) is driven by a variable frequency motor.
The battery truck group consists of a battery truck traction machine head (13), a mud tank (14) and a tank section transport vehicle (15).
A vertical oil cylinder (7-2) arranged on the return force support system trolley (7) is mainly used for adjusting the horizontal elevation of the trolley; the horizontal telescopic oil cylinder (7-4) is used for fixing the back support shoe (7-5); the thrust oil cylinder (7-7) is used for pushing shield tunneling.
The special segment (16) consists of a steel structure part (16-3) and a glass fiber concrete part (16-4), and the glass fiber concrete part (16-4) is used for being broken by the cutter head (6).
The limit lifting capacity of a crane (9-1) on the segment lifting trolley (9) is 3 tons plus 3 tons, and the control mode is handle control plus remote control.
And (3) performing the bin filling and pressure maintaining on the starting pouring jacket (1) in the step (S4) and the receiving pouring jacket (2) in the step (S6), checking the plugging effect, repairing leaks in time, and performing the bin filling and pressure maintaining again after the repairing is finished.
And (S5-3) grouting to reduce friction, stirring bentonite by using a bentonite trolley (8), and pumping the bentonite out of the shield body (5) and to the back of the duct piece (4) by using a bentonite pump through a pipeline, so that the friction resistance of the movement of the shield body and the duct piece is reduced.
Claims (8)
1. A subway tunnel transverse passage small shield construction process is characterized by comprising the following steps:
s1, measuring a segment (3) of a main tunnel in advance, producing a special segment (16) with the same size of a reserve main tunnel, when a shield machine digs to the position of a transverse channel of the main tunnel, splicing the special segment (16) instead of a common segment, using a grouting machine to perform cement grouting (16-2) in surrounding rocks through grouting holes (16-1) arranged on the special segment (16), and reinforcing the inlet and the outlet of the transverse channel;
s2, installing trolleys of the small shield and a trolley (7) of the return force supporting system in a certain sequence by using a vertical shaft and a crane, hoisting the trolleys to a well, and carrying the trolleys to a transverse passage position by using a storage battery transport vehicle (13) for assembling and debugging;
s3, installing and adjusting a lower supporting shoe (7-1), a vertical oil cylinder (7-2), a traveling wheel (7-3), a horizontal telescopic oil cylinder (7-4), a rear supporting shoe (7-5), an upper supporting shoe (7-6) and a propulsion oil cylinder (7-7) of a return force supporting system trolley (7) according to the position and elevation of a transverse channel, installing a starting sleeve box (1) at the inlet of the transverse channel, and installing a receiving sleeve box (2) at the outlet position to realize the totally-closed small shield tunneling process;
s4, injecting grease into the starting pouring jacket (1) until the starting pouring jacket is full, establishing certain internal pressure to enable the pressure value to be consistent with the calculated soil pressure, and checking the sealing performance of the shield body of the small shield and the starting pouring jacket (1) to ensure that leakage is not caused;
s5, starting tunneling by the small shield, and breaking the segment at the starting end by the blade (6), wherein in the tunneling process, the method comprises the following steps:
s5-1, excavating and jacking;
s5-2, discharging slag;
s5-3, grouting and reducing friction;
s5-4, measuring and correcting deviation;
s5-5, performing tunneling in a segment assembling process, and strictly controlling tunneling parameters in the tunneling process;
s6, before the receiving end pipe piece is excavated and broken, filling muck into the receiving sleeve box (2), and filling and maintaining pressure;
s7, tunneling to break a receiving end pipe piece, and entering into a receiving sleeve box (2);
and (3) performing water stopping and grouting operation from the transverse passage to the receiving end tunnel opening by using a grouting pump, ensuring that the tunnel opening is well sealed, removing the receiving sleeve box (2) after no leakage exists, and finally removing the shield machine and transporting the shield machine to the outside of the tunnel.
2. The small shield construction process of the transverse passage of the subway tunnel according to claim 1, wherein the small shield is a slurry balance shield machine, which comprises a shield body host (5), a bentonite trolley (8), a segment lifting trolley (9), a control trolley (10), a hydraulic pump station trolley (11) and an electrical equipment trolley (12), the shield body is articulated in an active articulation mode, and the cutter head (6) is driven by a variable frequency motor.
3. The shield construction process of the subway tunnel cross passage according to claim 1, wherein said battery truck group is composed of a battery truck tractor head (13), a mud tank (14) and a tank section transport vehicle (15).
4. The small shield construction process of the transverse passage of the subway tunnel according to claim 1, wherein a vertical oil cylinder (7-2) arranged on the trolley (7) of the return force support system is mainly used for adjusting the horizontal elevation of the trolley; the horizontal telescopic oil cylinder (7-4) is used for fixing the back support shoe (7-5); the thrust oil cylinder (7-7) is used for pushing shield tunneling.
5. The shield construction process of the transverse passage of the subway tunnel according to claim 1, wherein said special segment (16) is composed of a steel structure part (16-3) and a glass fiber concrete part (16-4), and the glass fiber concrete part (16-4) is used for cutting the cutter head (6).
6. The shield construction process of the transverse passage of the subway tunnel according to claim 1, wherein the limit lifting capacity of the crane (9-1) on the segment lifting trolley (9) is 3 tons plus 3 tons, and the control mode is handle control plus remote control.
7. The small shield construction process of the transverse passage of the subway tunnel according to claim 1, wherein the starting pouring jacket (1) in the step (S4) and the receiving pouring jacket (2) in the step (S6) are subjected to warehouse filling and pressure maintaining, the plugging effect check is required, the leakage phenomenon occurs, the leak is repaired in time, and after the repair is completed, warehouse filling and pressure maintaining are carried out again.
8. The small shield construction process of the transverse channel of the subway tunnel according to claim 1, wherein said step (S5-3) is grouting to reduce friction, bentonite is stirred by bentonite trolley (8), then bentonite is pumped to the outside of the shield (5) and the back of the segment (4) by a bentonite pump through a pipeline, and the friction resistance of the shield and the segment in movement is reduced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110534618.6A CN113187491A (en) | 2021-05-17 | 2021-05-17 | Subway tunnel transverse passage small shield construction process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110534618.6A CN113187491A (en) | 2021-05-17 | 2021-05-17 | Subway tunnel transverse passage small shield construction process |
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| Publication Number | Publication Date |
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| CN113187491A true CN113187491A (en) | 2021-07-30 |
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| CN202110534618.6A Pending CN113187491A (en) | 2021-05-17 | 2021-05-17 | Subway tunnel transverse passage small shield construction process |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113944473A (en) * | 2021-09-26 | 2022-01-18 | 中铁四局集团有限公司 | Rotary spraying construction method for increasing ductility of pile foundation of operation subway station |
| CN114033396A (en) * | 2021-11-08 | 2022-02-11 | 郑州地铁集团有限公司 | Subway tunnel layered filling machine |
| CN115110973A (en) * | 2022-07-26 | 2022-09-27 | 北京建工土木工程有限公司 | Connecting channel pipe jacking construction backrest system and using method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113944473A (en) * | 2021-09-26 | 2022-01-18 | 中铁四局集团有限公司 | Rotary spraying construction method for increasing ductility of pile foundation of operation subway station |
| CN114033396A (en) * | 2021-11-08 | 2022-02-11 | 郑州地铁集团有限公司 | Subway tunnel layered filling machine |
| CN114033396B (en) * | 2021-11-08 | 2024-02-02 | 郑州地铁集团有限公司 | Subway tunnel layering filling machine |
| CN115110973A (en) * | 2022-07-26 | 2022-09-27 | 北京建工土木工程有限公司 | Connecting channel pipe jacking construction backrest system and using method thereof |
| CN115110973B (en) * | 2022-07-26 | 2022-12-20 | 北京建工土木工程有限公司 | Connecting channel pipe jacking construction backrest system and using method thereof |
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