CN114278325A - Shield receiving method in subway construction - Google Patents
Shield receiving method in subway construction Download PDFInfo
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- CN114278325A CN114278325A CN202111670509.3A CN202111670509A CN114278325A CN 114278325 A CN114278325 A CN 114278325A CN 202111670509 A CN202111670509 A CN 202111670509A CN 114278325 A CN114278325 A CN 114278325A
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Abstract
The invention discloses a shield receiving method in subway construction, which comprises a receiving well for receiving a shield machine during construction; before the shield machine reaches a receiving well, arranging a monitoring section at one end along a designed tunneling path of the shield machine, wherein the monitoring section is connected with the receiving well and has the length of not less than 50m, arranging a plurality of monitoring points for detecting the posture of the shield machine in a stratum of the monitoring section, and reinforcing a soil body at a receiving end of the receiving well; after the shield machine tunnels to the monitoring section, adjusting the posture of the shield machine once every section of the shield machine tunnels with a preset length, so that the tunneling direction of the shield machine is adjusted to the designed tunneling path until the tunneling direction is coincident; and receiving the shield tunneling machine in the receiving well by adopting the bracket. The method has the advantages of high accuracy, good safety, low operation difficulty, easy implementation and application and the like.
Description
Technical Field
The invention relates to the technical field of shield construction, in particular to a shield receiving method in subway construction.
Background
In subway shield construction, it is an important work that a shield finishes receiving a shield machine when the shield reaches a key point. How to ensure the accuracy, stability, safety and operation difficulty of shield receiving work and avoid the problems of settlement, leakage and the like is mainly considered in shield receiving construction. The conventional shield receiving method adopts a conventional deviation rectifying method to adjust the posture of the shield machine when the shield machine digs into a receiving well, so that the shield machine finally and accurately enters the receiving well, the receiving end of the receiving well is a constructed door opening, the requirement on the position precision of the shield machine is high, and the precision is difficult to ensure by the conventional deviation rectifying method. In addition, the existing shield receiving method has no measure for effectively controlling sedimentation, and has the defects of high operation difficulty and low safety.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a shield receiving method in subway construction, which has the advantages of high accuracy, good safety, low operation difficulty and easy implementation and application.
In order to solve the technical problems, the invention adopts the following technical scheme:
a shield receiving method in subway construction comprises the following steps:
(S1) constructing a receiving well for receiving the shield machine;
(S2) before the shield machine reaches the receiving well, arranging a monitoring section at one end along the designed tunneling path of the shield machine, wherein the monitoring section is connected with the receiving well and has the length of not less than 50m, arranging a plurality of monitoring points for detecting the posture of the shield machine in the stratum of the monitoring section, and reinforcing the receiving end soil body of the receiving well;
(S3) after the shield machine tunnels to the monitoring section, adjusting the posture of the shield machine once every section of the shield machine tunnels with a preset length, and adjusting the tunneling direction of the shield machine towards the designed tunneling path until the tunneling direction is coincident;
(S4) receiving the shield machine in the receiving well using the cradle.
As a further improvement of the above technical solution:
in the step (S2), the distance between adjacent monitoring points is not more than 10 meters.
In the step (S2), a receiving end soil body of the receiving well is reinforced by grouting to form a reinforcing body, the reinforcing body extends outwards along the radial direction relative to the designed tunnel by not less than 3 meters, and the length of the reinforcing body along the direction of the designed tunnel is not less than 12 meters.
In the step (S3), in the tunneling process of the monitoring section, after one ring of tunnel lining is completed in each construction, gaps between the ring of tunnel lining and the surrounding soil mass and between the ring of tunnel lining and the previous ring of tunnel lining are immediately sealed by grouting.
And the adjacent two rings of tunnel linings are tightened and fastened by bolts.
In the step (S3), the tunneling speed of the shield tunneling machine is 5-10 mm/min, and the thrust is 800-1000 t.
In the step (S4), the height of the bracket is 20-30 mm lower than that of the shield tunneling machine.
Compared with the prior art, the invention has the advantages that:
according to the shield receiving method in subway construction, the self-receiving well is provided with the monitoring section, the monitoring section is provided with the plurality of monitoring points which are sequentially arranged at intervals, so that the posture of the shield machine is conveniently monitored, reliable reference is provided for the posture and the driving direction of the shield machine, meanwhile, the posture of the shield machine is adjusted for a plurality of times by matching with the monitoring points when the shield machine drives into the monitoring section, the shield machine can be ensured to accurately enter the receiving well, and the accuracy, the stability and the safety of shield receiving work are ensured. The shield receiving method has the advantages of low operation difficulty and easy implementation and application.
Drawings
Fig. 1 is a process flow chart of a shield receiving method in subway construction.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples.
As shown in fig. 1, the shield receiving method in subway construction according to this embodiment includes the following steps:
(S1) constructing a receiving well for receiving the shield machine;
(S2) before the shield machine reaches the receiving well, arranging a monitoring section along the designed tunneling path of the shield machine, wherein the monitoring section is connected with the receiving well and has the length of not less than 50m, arranging a plurality of monitoring points for detecting the posture of the shield machine in the stratum of the monitoring section, and reinforcing the receiving end soil body of the receiving well;
(S3) after the shield machine tunnels to the monitoring section, the posture of the shield machine is adjusted once every section of the shield machine tunnels with a preset length, so that the tunneling direction of the shield machine is adjusted to the designed tunneling path until the tunneling direction is coincident with the designed tunneling path;
(S4) receiving the shield machine in the receiving well using the cradle.
According to the shield receiving method in subway construction, the self-receiving well is provided with the monitoring section, the monitoring section is provided with the monitoring points which are sequentially arranged at intervals, so that the posture of the shield machine can be monitored conveniently, reliable reference is provided for the posture and the driving direction of the shield machine, meanwhile, the monitoring points are matched when the shield machine drives into the monitoring section, the posture of the shield machine is adjusted for multiple times, the shield machine can be ensured to accurately enter the receiving well, and the accuracy, stability and safety of shield receiving work are ensured. The shield receiving method has the advantages of low operation difficulty and easy implementation and application.
In this embodiment, in the step (S2), the distance between adjacent monitoring points is not greater than 10 meters. The shield machine can be reliably monitored in the monitoring section, the number of monitoring points is reduced as much as possible, and cost reduction is facilitated.
In this embodiment, in the step (S2), a receiving end soil body of the receiving well is reinforced by grouting to form a reinforcing body, the reinforcing body extends radially outward for not less than 3 meters relative to the designed tunnel, and the length of the reinforcing body along the direction of the designed tunnel is not less than 12 meters. After the shield machine tunnels and is close to the receiving well, the strength and the stability of the front soil body can be deteriorated along with the reduction of the front soil body, and the receiving end soil body of the receiving well is subjected to grouting reinforcement treatment to form a reinforced body, so that the phenomena of floating, head knocking, retreating and the like of the shield machine can be avoided, and the shield machine can tunnel through the part of the soil body in a balanced state.
In this embodiment, in the step (S3), in the process of tunneling by the shield tunneling machine in the monitoring section, after one tunnel lining is completed in each construction, gaps between the tunnel lining and the surrounding soil mass and between the tunnel lining and the previous tunnel lining are immediately sealed by grouting. The stability of the surrounding soil body can be ensured, the sedimentation is reduced, the sealing effect is improved, and the phenomena of water burst and sand burst are avoided.
In this embodiment, two adjacent tunnel linings are tightened and fastened by bolts. Prevent that tunnel lining's section of jurisdiction is lax and influence sealed water-proof effects.
In the present embodiment, in the step (S3), the tunneling speed of the shield tunneling machine is 5 to 10mm/min, and the thrust is 800 to 1000 t. The tunneling speed and the thrust are reasonable in arrangement, and disturbance to surrounding soil bodies can be effectively reduced and ground settlement can be controlled.
In this embodiment, in the step (S4), the height of the bracket is lower than the shield machine by 20-30 mm, so that the shield machine can smoothly fall on the bracket.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-described embodiments. Modifications and variations that may occur to those skilled in the art without departing from the spirit and scope of the invention are to be considered as within the scope of the invention.
Claims (7)
1. A shield receiving method in subway construction is characterized by comprising the following steps:
(S1) constructing a receiving well for receiving the shield machine;
(S2) before the shield machine reaches the receiving well, arranging a monitoring section along the designed tunneling path of the shield machine, wherein the monitoring section is connected with the receiving well and has the length of not less than 50m, arranging a plurality of monitoring points for detecting the posture of the shield machine in the stratum of the monitoring section, and reinforcing the receiving end soil body of the receiving well;
(S3) after the shield machine tunnels to the monitoring section, adjusting the posture of the shield machine once every section of the shield machine tunnels with a preset length, and adjusting the tunneling direction of the shield machine towards the designed tunneling path until the tunneling direction is coincident;
(S4) receiving the shield machine in the receiving well using the cradle.
2. The shield receiving method in subway construction as claimed in claim 1, wherein in said step (S2), the spacing between adjacent monitoring points is not more than 10 m.
3. The shield receiving method in subway construction as claimed in claim 1, wherein in said step (S2), a receiving end soil body of the receiving well is reinforced by grouting to form a reinforcement body, said reinforcement body extends radially outward not less than 3 meters relative to the designed tunnel, and the length of said reinforcement body along the direction of the designed tunnel is not less than 12 meters.
4. The shield receiving method in subway construction as claimed in claim 1, wherein in said step (S3), in the process of said monitoring section driving, after a ring of tunnel lining is completed in each construction, the gap between the ring of tunnel lining and the surrounding soil and the previous ring of tunnel lining is immediately sealed by grouting.
5. The shield receiving method in subway construction as claimed in claim 4, wherein the adjacent two rings of tunnel linings are tightened and fastened by bolts.
6. The shield receiving method in subway construction as claimed in claim 1, wherein in said step (S3), the tunneling speed of the shield machine is 5-10 mm/min and the thrust is 800-1000 t.
7. The shield receiving method in subway construction as claimed in any one of claims 1-6, wherein in said step (S4), the height of said bracket is 20-30 mm lower than that of said shield machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111670509.3A CN114278325A (en) | 2021-12-31 | 2021-12-31 | Shield receiving method in subway construction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111670509.3A CN114278325A (en) | 2021-12-31 | 2021-12-31 | Shield receiving method in subway construction |
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| Publication Number | Publication Date |
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| CN114278325A true CN114278325A (en) | 2022-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111670509.3A Pending CN114278325A (en) | 2021-12-31 | 2021-12-31 | Shield receiving method in subway construction |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101975067A (en) * | 2010-10-20 | 2011-02-16 | 中铁隧道集团二处有限公司 | Light-section mud shield powder fine sand layer receiving method |
| CN105863656A (en) * | 2016-04-07 | 2016-08-17 | 国家电网公司 | Shield tunneling method |
| CN106382121A (en) * | 2016-12-05 | 2017-02-08 | 中交第三航务工程局有限公司 | Measuring method for subway tunnel shield excavation |
| CN108625863A (en) * | 2018-03-21 | 2018-10-09 | 浙江大学城市学院 | A kind of weak soil shield receives control and reinforcement means |
| CN109403988A (en) * | 2018-12-27 | 2019-03-01 | 中铁隧道集团三处有限公司 | A kind of multiple received construction of special formation arrival |
| CN112065410A (en) * | 2020-08-05 | 2020-12-11 | 广州市市政工程设计研究总院有限公司 | Method for receiving in shield soil body |
| CN113833480A (en) * | 2021-09-29 | 2021-12-24 | 成都建工第九建筑工程有限公司 | Shield initial tunneling and arrival construction method |
-
2021
- 2021-12-31 CN CN202111670509.3A patent/CN114278325A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101975067A (en) * | 2010-10-20 | 2011-02-16 | 中铁隧道集团二处有限公司 | Light-section mud shield powder fine sand layer receiving method |
| CN105863656A (en) * | 2016-04-07 | 2016-08-17 | 国家电网公司 | Shield tunneling method |
| CN106382121A (en) * | 2016-12-05 | 2017-02-08 | 中交第三航务工程局有限公司 | Measuring method for subway tunnel shield excavation |
| CN108625863A (en) * | 2018-03-21 | 2018-10-09 | 浙江大学城市学院 | A kind of weak soil shield receives control and reinforcement means |
| CN109403988A (en) * | 2018-12-27 | 2019-03-01 | 中铁隧道集团三处有限公司 | A kind of multiple received construction of special formation arrival |
| CN112065410A (en) * | 2020-08-05 | 2020-12-11 | 广州市市政工程设计研究总院有限公司 | Method for receiving in shield soil body |
| CN113833480A (en) * | 2021-09-29 | 2021-12-24 | 成都建工第九建筑工程有限公司 | Shield initial tunneling and arrival construction method |
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