CN114293998A - Subway underpass highway shield construction method - Google Patents
Subway underpass highway shield construction method Download PDFInfo
- Publication number
- CN114293998A CN114293998A CN202111670459.9A CN202111670459A CN114293998A CN 114293998 A CN114293998 A CN 114293998A CN 202111670459 A CN202111670459 A CN 202111670459A CN 114293998 A CN114293998 A CN 114293998A
- Authority
- CN
- China
- Prior art keywords
- shield
- shield machine
- expressway
- highway
- machine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a shield construction method for a subway underpass expressway, which comprises the steps of adopting a shield machine to tunnel in a rock-soil layer to reach a section which is not less than 12-15 meters away from the expressway, rectifying the posture of the shield machine for multiple times, and enabling the shield machine to meet the posture requirement of designing a tunneling path when the shield machine tunnels to a position which is 12-15 meters away from the expressway; starting from a position 12-15 meters away from the expressway, controlling the tunneling speed of the shield tunneling machine at 30-50 mm/min, controlling the thrust at 12000-15000 KN, and controlling the torque at 2000-3000 KN-m; and the step of tunneling until the shield tunneling machine tunnels through the expressway and the distance between the shield tunneling machine and the expressway is not less than 12 meters. The invention has the advantages of effectively reducing disturbance to surrounding soil and controlling ground settlement, along with high safety, simple and convenient construction, easy operation, popularization and implementation and the like.
Description
Technical Field
The invention relates to the technical field of shield construction, in particular to a shield construction method for a subway underpass expressway.
Background
In subway shield construction, it is often necessary to pass through highways. When the shield machine digs and passes through the lower part of the highway, soil layer loss and underground water disturbance can be caused, sedimentation deformation and gravitation increase are caused, and then the highway is settled, and safety risks are caused. At present, no construction process method capable of well controlling track settlement exists for shield construction of underground underpass highways.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the construction method for the underground underpass highway shield, which can effectively reduce the disturbance to the surrounding soil body and control the ground settlement, has high safety, simple and convenient construction and easy operation, popularization and implementation.
In order to solve the technical problems, the invention adopts the following technical scheme:
a subway underpass expressway shield construction method comprises the following steps:
(S1) adopting the shield machine to rectify the posture of the shield machine for multiple times in a section of the rock-soil layer which is tunneled to a position which is not less than 12-15 meters away from the highway, so that the shield machine accords with the posture requirement of the designed tunneling path when being tunneled to the position which is 12-15 meters away from the highway;
(S2) starting from a position 12-15 meters away from the highway, controlling the tunneling speed of the shield tunneling machine at 30-50 mm/min, controlling the thrust at 12000-15000 KN and controlling the torque at 2000-3000 KN-m;
(S3) the shield machine continues to tunnel by adopting a conventional shield tunneling method until the shield machine tunnels through the highway and tunnels to a position which is not less than 12 meters away from the highway.
As a further improvement of the above technical solution:
in the step (S1), during the shield process, once construction of a ring of tunnel lining is completed, the shield machine is subjected to posture correction once, and the angle of the correction adjustment shield machine each time is not more than 0.4% of the included angle between the axis of the shield machine and the axis of the preset tunnel.
In the step (S3) and the step (S4), the loss of the soil body dug by the shield machine is controlled within 0.5 percent.
In the step (S3) and the step (S4), grouting is synchronously performed between the constructed annular lining and the rock-soil layer while the shield machine is tunneling.
The slurry adopted by the grouting is prepared by mixing and stirring 220kg of cement, 320kg of fly ash, 765kg of sand, 100kg of bentonite and 500 +/-50 kg of water.
And arranging an equipment maintenance section at a position 12-15 meters away from the highway, and when the shield machine tunnels to the equipment maintenance section, maintaining the shield machine.
Compared with the prior art, the invention has the advantages that:
according to the construction method of the subway underpass expressway shield, the posture of the shield machine is corrected in a section of time which is not less than 12-15 meters away from the expressway, so that the shield machine is adjusted to the optimal posture before passing through the expressway, larger correction can be avoided during passing through the expressway, disturbance of the shield machine on surrounding soil due to violent adjustment is reduced, surface subsidence can be reduced as far as possible, and the safety of the expressway is guaranteed. Meanwhile, in the process that the shield machine passes through the highway, the disturbance to the surrounding soil body can be effectively reduced and the ground settlement can be controlled by reasonably controlling the tunneling speed, the thrust and the torque, so that the deformation of the ground and the highway in the process of passing through is reduced to the minimum degree.
Drawings
Fig. 1 is a construction flow chart of a shield construction method for a subway underpass highway.
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 construction method for the subway underpass highway of the embodiment includes the following steps:
(S1) adopting the shield machine to rectify the posture of the shield machine for multiple times in a section of the rock-soil layer which is tunneled to a position which is not less than 12-15 meters away from the highway, so that the shield machine accords with the posture requirement of the designed tunneling path when being tunneled to the position which is 12-15 meters away from the highway;
(S2) starting from a position 12-15 meters away from the highway, controlling the tunneling speed of the shield tunneling machine at 30-50 mm/min, controlling the thrust at 12000-15000 KN and controlling the torque at 2000-3000 KN-m;
(S3) the shield machine continues to tunnel by adopting a conventional shield tunneling method until the shield machine tunnels through the highway and tunnels to a position which is not less than 12 meters away from the highway.
According to the shield construction method for the subway underpass expressway, the posture of the shield machine is corrected in a section of time which is not less than 12-15 meters away from the expressway, so that the shield machine is adjusted to the optimal posture before passing through the expressway, the large correction during the process of passing through the expressway can be avoided, the disturbance of the shield machine on the surrounding soil body due to violent adjustment is reduced, the ground surface settlement can be reduced as far as possible, and the safety of the expressway is ensured. Meanwhile, in the process that the shield machine passes through the highway, the disturbance to the surrounding soil body can be effectively reduced and the ground settlement can be controlled by reasonably controlling the tunneling speed, the thrust and the torque, so that the deformation of the ground and the highway in the process of passing through is reduced to the minimum degree. The construction method for the underground underpass highway shield also has the advantages of simple and convenient construction, easy operation, popularization and implementation and the like.
In this embodiment, in step (S1), each time a tunnel lining construction is completed in the shield process, the shield machine is subjected to one-time attitude deviation correction, and the angle of the deviation correction adjustment shield machine is no more than 0.4% of the included angle between the axis of the shield machine and the axis of the preset tunnel, so that the problem that the included angle between segments of the shield machine and the annular lining of the tunnel is too large to cause soil loss is avoided, the influence of the shield construction on the ground is reduced, and the normal operation of the shield machine is ensured.
In this embodiment, in the step (S3) and the step (S4), the loss of the soil body excavated by the shield machine is controlled to be within 0.5%, so as to ensure the balance of the soil pressure and further reduce the ground settlement.
In this embodiment, in the step (S3) and the step (S4), grouting is performed between the constructed annular lining and the rock-soil layer simultaneously while the shield machine is tunneling. The method can be used for reinforcing the rock-soil layer around the tunnel in time, and can be used for forming good combination between the annular lining and the rock-soil layer, greatly reducing the disturbance to the rock-soil layer, reducing the settlement during construction and after construction and ensuring the safety.
In this example, the slurry used for grouting was prepared by mixing 220kg of cement, 320kg of fly ash, 765kg of sand, 100kg of bentonite and 500 ± 50kg of water and stirring. The slurry with the ratio can effectively prevent the loosening of the peripheral soil body, and has a good reinforcing effect.
In this embodiment, set up the overhaul of equipments section in the position department of 12 ~ 15 meters apart from the highway, when the shield constructs the machine and tunnels to this overhaul of equipments section, overhaul the maintenance to the shield structure machine. The condition that no fault occurs in the process of passing through the highway is ensured as much as possible, so that the condition that the control of settlement is not possible due to the fact that the highway cannot be rapidly passed through due to shutdown maintenance is avoided.
The subway underpass highway shield construction method is based on the characteristics of highways on the ground base bottom surface, and can effectively reduce settlement of a highway area and improve safety by correcting the posture of the shield machine in advance and optimizing and setting reasonable tunneling speed, thrust, torque, deviation correction amount, tunneling soil loss amount and grouting slurry in a reasonable proportion of the shield machine.
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 (6)
1. A subway underpass expressway shield construction method is characterized by comprising the following steps:
(S1) adopting the shield machine to rectify the posture of the shield machine for multiple times in a section of the rock-soil layer which is tunneled to a position which is not less than 12-15 meters away from the highway, so that the shield machine accords with the posture requirement of the designed tunneling path when being tunneled to the position which is 12-15 meters away from the highway;
(S2) starting from a position 12-15 meters away from the highway, controlling the tunneling speed of the shield tunneling machine at 30-50 mm/min, controlling the thrust at 12000-15000 KN and controlling the torque at 2000-3000 KN-m;
(S3) the shield machine continues to tunnel by adopting a conventional shield tunneling method until the shield machine tunnels through the highway and tunnels to a position which is not less than 12 meters away from the highway.
2. The shield construction method for the underground underpass expressway of claim 1, wherein in the step (S1), the shield machine is subjected to attitude deviation correction once every time a ring of tunnel lining construction is completed in the shield process, and the angle of the shield machine adjusted by deviation correction each time is not more than 0.4% of the included angle between the axis of the shield machine and the preset tunnel axis.
3. The shield construction method for the underground subway underpass highway according to claim 1, wherein in the step (S3) and the step (S4), the loss amount of soil body excavated by the shield machine is controlled within 0.5%.
4. The shield construction method of the underground underpass expressway of claim 1, wherein in the steps (S3) and (S4), the shield machine is driven while grouting is simultaneously performed between the constructed annular lining and the geotechnical layer.
5. The shield construction method for the underground underpass expressway of claim 4, wherein the slurry adopted by the grouting is obtained by mixing and stirring 220kg of cement, 320kg of fly ash, 765kg of sand, 100kg of bentonite and 500 +/-50 kg of water.
6. The shield construction method for the underground subway underpass expressway according to any one of claims 1 to 5, wherein an equipment maintenance section is arranged at a position 12-15 meters away from the expressway, and when the shield machine tunnels to the equipment maintenance section, maintenance is performed on the shield machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111670459.9A CN114293998A (en) | 2021-12-31 | 2021-12-31 | Subway underpass highway shield construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111670459.9A CN114293998A (en) | 2021-12-31 | 2021-12-31 | Subway underpass highway shield construction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114293998A true CN114293998A (en) | 2022-04-08 |
Family
ID=80972680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111670459.9A Pending CN114293998A (en) | 2021-12-31 | 2021-12-31 | Subway underpass highway shield construction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114293998A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101215969A (en) * | 2008-01-17 | 2008-07-09 | 上海交通大学 | Large diameter tunneling close range down-traversing small diameter subway tunnel distortion control method |
| CN102720508A (en) * | 2012-04-28 | 2012-10-10 | 中铁二局股份有限公司 | Shield construction method for continuously under-passing dense buildings in silty-soil and silty-sand formation |
| CN103161470A (en) * | 2011-12-13 | 2013-06-19 | 上海市基础工程有限公司 | Construction method for shield machine to penetrate through large caliber pipeline in long distance |
| CN104389613A (en) * | 2014-09-26 | 2015-03-04 | 上海隧道工程有限公司 | Construction method of slurry balance shield crossing dangerous underground pipeline |
| CN106677791A (en) * | 2017-02-21 | 2017-05-17 | 中铁二十局集团第三工程有限公司 | Construction method for enabling shallow shield tunnel to pass through highway |
| CN111156009A (en) * | 2020-01-10 | 2020-05-15 | 中铁二十二局集团轨道工程有限公司 | Construction and monitoring method for tunnel shield underpass viaduct |
| CN112922616A (en) * | 2019-12-05 | 2021-06-08 | 宏润建设集团股份有限公司 | Method for controlling shield crossing construction |
-
2021
- 2021-12-31 CN CN202111670459.9A patent/CN114293998A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101215969A (en) * | 2008-01-17 | 2008-07-09 | 上海交通大学 | Large diameter tunneling close range down-traversing small diameter subway tunnel distortion control method |
| CN103161470A (en) * | 2011-12-13 | 2013-06-19 | 上海市基础工程有限公司 | Construction method for shield machine to penetrate through large caliber pipeline in long distance |
| CN102720508A (en) * | 2012-04-28 | 2012-10-10 | 中铁二局股份有限公司 | Shield construction method for continuously under-passing dense buildings in silty-soil and silty-sand formation |
| CN104389613A (en) * | 2014-09-26 | 2015-03-04 | 上海隧道工程有限公司 | Construction method of slurry balance shield crossing dangerous underground pipeline |
| CN106677791A (en) * | 2017-02-21 | 2017-05-17 | 中铁二十局集团第三工程有限公司 | Construction method for enabling shallow shield tunnel to pass through highway |
| CN112922616A (en) * | 2019-12-05 | 2021-06-08 | 宏润建设集团股份有限公司 | Method for controlling shield crossing construction |
| CN111156009A (en) * | 2020-01-10 | 2020-05-15 | 中铁二十二局集团轨道工程有限公司 | Construction and monitoring method for tunnel shield underpass viaduct |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110821503B (en) | Construction method for main body of ultra-deep shield section air shaft after tunnel advance | |
| CN104265307B (en) | Non-uniform-hardness stratum earth pressure balance shield tunnel underpassing railway existing line construction method | |
| CN100501124C (en) | Construction method for tunnel contact passage in shield section of underground railway | |
| CN104594911B (en) | Shield launching stage or reception stage wear down the construction method of operating line | |
| CN107120121B (en) | A kind of shield-tunneling construction supplements slip casting anti-settling control method in real time | |
| CN102758635B (en) | Construction method for tool changing under pressure in shield of water-rich silty soil and silty sand stratum under station tracks of railways | |
| CN108104824A (en) | A kind of Soft Soil Area slurry shield passes through existing constructing metro tunnel method | |
| CN102155234B (en) | Excavation construction method for unsymmetrical small-space tunnel | |
| AU2021355609B2 (en) | Method for mining by filling and caving | |
| CN102094650A (en) | Construction method for shield holing under complicated working conditions | |
| CN108916467A (en) | Heavy caliber sigmoid curve pipe jacking construction method | |
| CN107747488B (en) | The construction method of big cross section shape of a hoof shield launching | |
| CN107725060A (en) | Constructing metro tunnel method containing complicated geological and without shield launching place | |
| CN105909253A (en) | Quick receiving method for shield receiving vertical shaft without lining structure | |
| CN107780955B (en) | Controllable grouting reinforcement device for breaking surrounding rock roadway and construction method | |
| CN106978821A (en) | A kind of soft soil layer reduces shield driving and applies method to the retaining design that building foundation influences | |
| CN111577324B (en) | Segment fixing pile device for fixing shield tunnel segment and using method | |
| CN110578525A (en) | micro-disturbance construction method for crossing operation subway tunnel by overlapping shield tunnel | |
| CN108661652B (en) | Reinforcing device and method for shield starting and receiving ends in mine tunnel | |
| CN114293998A (en) | Subway underpass highway shield construction method | |
| CN105065011A (en) | Construction method of soft soil shield tunneling cutting pile foundation | |
| CN106401617A (en) | Steel arch and joint thereof | |
| CN108252307A (en) | A kind of foundation pit construction method for underground tunnel upper | |
| CN106522986A (en) | Preloading device and construction method for tunnel segment assembling | |
| CN110513129A (en) | A kind of loose thick coal layer roadway workface fore-support supporting construction and method for protecting support |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |