CN111206938B - Anti-settling method for shield tunneling machine to pass through airport taxiway - Google Patents
Anti-settling method for shield tunneling machine to pass through airport taxiway Download PDFInfo
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- CN111206938B CN111206938B CN202010215194.2A CN202010215194A CN111206938B CN 111206938 B CN111206938 B CN 111206938B CN 202010215194 A CN202010215194 A CN 202010215194A CN 111206938 B CN111206938 B CN 111206938B
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- 238000000034 method Methods 0.000 title claims abstract description 50
- 230000005641 tunneling Effects 0.000 title claims abstract description 30
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 12
- 238000004062 sedimentation Methods 0.000 claims abstract description 5
- 238000010276 construction Methods 0.000 abstract description 29
- 230000002787 reinforcement Effects 0.000 description 10
- 230000003247 decreasing effect Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005422 blasting Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002354 daily effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000005728 strengthening 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
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/14—Telescopic props
- E21D15/44—Hydraulic, pneumatic, or hydraulic-pneumatic props
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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)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention relates to an anti-sedimentation method for a shield machine to pass through an airport taxiway, which mainly comprises the following steps: determining a traveling route of the shield tunneling machine; determining an influence area of a shield tunneling machine advancing route; digging an operation well outside an influence area of the shield tunneling machine; digging a reinforcing channel in the operation well, wherein the reinforcing channel is parallel to the advancing route of the shield machine; and applying an upward thrust force to the airport runway within the reinforced tunnel to resist settlement of the airport runway during travel of the shield machine. The method is used for reinforcing the foundation of the shield machine in the process of crossing the airport runway, and can reinforce the airport runway in the process of shield machine construction, so that the airport can normally run in the construction period.
Description
Technical Field
The invention relates to the technical field of underground construction, in particular to an anti-sedimentation method for a shield machine to pass through an airport taxiway.
Background
Subways are track traffic facilities which are towed by electric power in urban traffic, along with the continuous development and extension of urban subways, many urban subways are communicated with airports, and traffic networks are developed increasingly. From the time point of view, the appearance of airplanes and airports is earlier than that of subways, so that in the planning process of subways, not only the position of the airport but also the layout and facilities of the airport need to be considered.
The construction method of the subway includes an open cut method, a closed cut method, a drilling and blasting method, a shield method and the like, and for the construction of the underground tunnel in the airport, only the closed cut method and the shield method can be used, because the open cut method damages the ground, and the drilling and blasting method causes irreversible building damage.
The construction speed of the undercut method is low, the construction period is long, the requirement of the whole construction period cannot be met, the construction speed of the shield method is high, the construction period can be guaranteed, but the structural strength of an airport runway can be influenced in the process of crossing the airport runway, and further the normal operation of the airport is influenced.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a settlement preventing method for the shield tunneling machine to pass through the airport taxiway, which can reduce the settlement of the airport taxiway in the construction process and ensure that the airport can normally run.
The above object of the present invention is achieved by the following technical solutions:
an anti-sedimentation method for a shield machine to pass through an airport taxiway comprises the following steps:
determining a traveling route of the shield tunneling machine;
determining an influence area of a shield tunneling machine advancing route;
digging an operation well outside an influence area of the shield tunneling machine;
digging a reinforcing channel in the operation well, wherein the reinforcing channel is parallel to the advancing route of the shield machine; and
and applying an upward thrust to the airport runway in the reinforced channel to resist the settlement of the airport runway during the traveling of the shield machine.
By adopting the technical scheme, after the advancing route of the shield machine is determined, the reinforced channels are additionally arranged on the two sides of the shield machine, and then an upward thrust is applied to the airport runway in the reinforced channels to resist the settlement of the airport runway. The method reduces the settlement of the runway of the airport by applying thrust to the runway of the airport on two sides of the advancing route of the shield machine, can effectively avoid the settlement in the area above the advancing route in the construction process of simply using the shield machine, and enables the airplane of the airport to normally take off and land in the construction process.
In a preferred embodiment of the invention: in the advancing process of the shield machine, the airport runway above the area where the shield machine is located is detected, the settlement value of the area is obtained, and when the settlement value exceeds a set threshold value, upward thrust in the area is increased.
By adopting the technical scheme, the thrust applied to the airport runway can be dynamically adjusted through the actual settlement value, so that excessive settlement caused by too small thrust can be avoided, and local arching of the airport runway caused by too large thrust can also be avoided.
In a preferred embodiment of the invention: the number of the reinforced passages is two, and the two groups of reinforced passages are respectively positioned on two sides of the advancing route of the shield machine.
By adopting the technical scheme, the reinforcing channels on the two sides of the shield tunneling machine simultaneously apply thrust to the airfield runway, the contact points and the stressed area are increased, the stress of the airfield runway can be more uniform, and the possibility of internal structural damage of the airfield runway is reduced.
In a preferred embodiment of the invention: the number of the reinforcing channels in each group is two or more.
By adopting the technical scheme, the thrust is simultaneously applied to the airfield runway by the plurality of reinforced channels on each side of the shield tunneling machine, the contact points and the stressed area are increased, the stress of the airfield runway can be more uniform, and the possibility of internal structural damage of the airfield runway is reduced.
In a preferred embodiment of the invention: a plurality of hydraulic lifting devices are arranged in the reinforced channel at intervals and used for applying an upward thrust to the airport runway.
Through adopting above-mentioned technical scheme, use a plurality of hydraulic lifting devices to exert thrust to the airport runway, compare with mechanical type or vapour-pressure type lifting device, hydraulic lifting device's is small, and transmission pressure is big, can satisfy the narrow and small and to the needs of big lifting force in underground construction space.
In a preferred embodiment of the invention: the distance between the adjacent hydraulic lifting devices is 1-1.2 m.
By adopting the technical scheme, the arrangement mode of the hydraulic lifting devices is given, the arrangement mode can enable the arrangement of the hydraulic lifting devices to be more reasonable, the difficulty in assembly and disassembly caused by narrow construction space in a reinforced channel due to intensive arrangement can be avoided, the situation that the airfield runway is not enough in stress and the settlement exceeds the allowable range or the wave-shaped fluctuation due to loose arrangement is avoided.
In a preferred embodiment of the invention: in the advancing process of the shield machine, the airport runway above the area where the shield machine is located is detected, the settlement value of the area is obtained, and when the settlement value exceeds a set threshold value, the lifting value of the corresponding hydraulic lifting device in the area is increased.
By adopting the technical scheme, the hydraulic lifting device is dynamically adjusted, so that the hydraulic lifting device can be dynamically adjusted according to the settlement value of the area above the hydraulic lifting device, and the settlement value is controlled within an allowable range.
In a preferred embodiment of the invention: the hydraulic lifting devices in the reinforced channel are started according to the position sequence of the shield tunneling machine, and the driven hydraulic lifting devices are all positioned on the side and/or the rear of the shield tunneling machine.
By adopting the technical scheme, the hydraulic lifting device is started along with the advancing sequence of the shield machine, so that proper thrust is provided for the airport runway above the hydraulic lifting device, the settlement of the airport runway is reduced, and the power waste and the local deformation of the airport runway caused by the early starting of the hydraulic lifting device are avoided.
In conclusion, the beneficial technical effects of the invention are as follows:
1. after the traveling route of the shield machine is determined, reinforced channels are added on two sides of the shield machine, and then an upward thrust is applied to the airport runway in the reinforced channels to resist the settlement of the airport runway. The method reduces the settlement of the runway of the airport by applying thrust to the runway of the airport on two sides of the advancing route of the shield machine, can effectively avoid the settlement in the area above the advancing route in the construction process of simply using the shield machine, and enables the airplane of the airport to normally take off and land in the construction process.
2. In the advancing process of the shield machine, the thrust applied to the airport runway is dynamically adjusted through the actual settlement value, so that excessive settlement caused by too small thrust can be avoided, and local arching of the airport runway caused by too large thrust can also be avoided.
3. The reinforced channels on the two sides of the shield machine exert thrust on the airport runway simultaneously, contact points and stressed areas are increased, the stress on the airport runway can be more uniform, and the possibility of internal structural damage of the airport runway is reduced.
4. Thrust is exerted to the airport runway simultaneously to a plurality of reinforcement passageways of shield structure machine every side, and contact point and atress area increase can make the atress of airport runway more even, reduce the possibility that the interior structural damage appears in the airport runway.
5. The hydraulic lifting device is used for applying thrust to the airport runway, and compared with a mechanical or pneumatic lifting device, the hydraulic lifting device is small in size and large in transfer pressure, and can meet the requirements of narrow underground construction space and large lifting force.
6. The hydraulic lifting device is started along with the forward sequence of the shield machine, so that proper thrust is provided for the airport runway above the hydraulic lifting device, the settlement of the airport runway is reduced, and the power waste and the local deformation of the airport runway caused by the early start of the hydraulic lifting device are avoided.
Drawings
Fig. 1 is a schematic block diagram of a process provided by an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, a settlement preventing method for a shield machine to pass through a runway of an airport disclosed in the embodiment of the present invention mainly comprises the following steps:
and S101, determining a traveling route of the shield tunneling machine.
The step has the function of determining the advancing route of the shield machine according to the underground condition of the airport, the runway condition of the airport, the construction requirement and the like before construction, so that the advancing route can meet the engineering requirement, can bypass the underground facilities of the airport as much as possible, and simultaneously can reduce the influence and damage of the underground construction on the airport main body as much as possible.
S102, determining an influence area of the shield tunneling machine advancing route.
The method comprises the steps of determining an influence area near a route according to the advancing route of the shield machine, wherein the stability of an underground structure in the influence area of the shield machine is poor, and if a reinforcement channel is constructed in the area, the potential risk of instability of the reinforcement channel exists, so that the influence area of the advancing route of the shield machine needs to be determined firstly, an operation well, the reinforcement channel and the like are moved out of the influence area of the advancing route of the shield machine, and the safety of the whole construction is guaranteed.
And S103, digging an operation well outside the influence area of the shield tunneling machine.
And S104, digging a reinforcing channel in the operation well, wherein the reinforcing channel is parallel to the advancing route of the shield machine.
The two steps are to build an operation well and a reinforcement channel, wherein the reinforcement channel is positioned at one side of the traveling route of the shield tunneling machine, each reinforcement channel is provided with one or two operation wells, when one operation well is provided, the operation well is positioned at one end of the reinforcement channel, and when two operation wells are provided, the two operation wells are respectively positioned at two ends of the reinforcement channel.
Furthermore, the reinforced passages are divided into two groups, the two groups of reinforced passages are respectively positioned at two sides of the advancing route of the shield machine, in the advancing process of the shield machine, the airport runway above the reinforced passages is supported from two sides simultaneously, the stress of the airport runway can be more uniform by the supporting mode of the two sides, the thrust applied by each side can be reduced, the stress of the airport runway is more uniform from the perspective of safety, the possibility of internal structural damage is lower, and the integrity of the airport runway can be furthest ensured.
Furthermore, the number of each group of reinforced channels is two or more, so that the stress of the airport runway is more dispersed and more uniform.
And S105, applying an upward thrust to the airport runway in the reinforced channel to resist the settlement of the airport runway in the moving process of the shield machine.
The thrust is applied to the airport runway through the reinforced channel, because the support below the airport runway is removed in the advancing process of the shield machine, the part of the airport runway can have inevitable sedimentation under the action of self gravity, and the self gravity of the part of the airport runway can be offset by applying the thrust to the airport runway, so that the deformation is eliminated, and the airport runway can be normally used in the construction period of the shield machine.
In the construction process, the stress of the airport runway is dynamically changed, so that in the process of moving the shield machine, the airport runway in the area above the airport runway needs to be detected to obtain the dynamic settlement value in the area, when the settlement value is in an allowable range, the thrust applied to the airport runway is kept unchanged, and when the settlement value exceeds the allowable range, the thrust is properly increased to enable the settlement value to return to the allowable range.
However, when the monitored value of the sinking exhibits a decreasing trend, the thrust force is suitably increased, although it is still within the allowable range, to suppress this decreasing trend.
To the device that applys thrust in strengthening the passageway, preferentially select hydraulic lifting device for use because compare modes such as machinery, pneumatics, hydraulic lifting device's volume is littleer, and the power of transmission is also bigger, accords with the narrow and small and to the user demand of big thrust in underground construction space more.
The hydraulic lifting device mainly comprises a base, a cylinder body and a top plate, when the hydraulic lifting device is used, the base and the top plate are respectively abutted against the bottom surface and the fixed surface of the reinforced channel, the cylinder body extends, and thrust is applied to an airport runway above the cylinder body through the top plate.
The hydraulic lifting devices are arranged in the reinforced channel at intervals, the distance between every two adjacent hydraulic lifting devices is 1-1.2 meters, and the distance is set by comprehensively considering the tunneling speed of the shield tunneling machine and the actual field construction environment. The daily advancing speed of the shield machine is about 10 meters in terms of tunneling speed, and the speed can be further reduced and controlled to be about 6-8 meters in consideration of the actual construction environment in a airport. The number of the hydraulic lifting devices started every day is about 6-7, and the number is proper for the hydraulic station normally used, so that the pressure can be ensured, and the full-load operation or the overload operation can not be realized. From the construction environment of the site, the operation space of underground construction is narrow, too dense arrangement can cause assembly and disassembly difficulty, the shoulder width of one worker is about 0.5 m, if the worker works between two hydraulic lifting devices, the distance of 1-1.2 m is proper, and sufficient operation space can be ensured.
Similarly, when using a hydraulic lifting device, it is necessary to detect the airport runway in the area above it to obtain the dynamic settlement value in that area, and when the settlement value is within the allowable range, the thrust applied to the airport runway remains unchanged, and when the settlement value exceeds the allowable range, the thrust is increased appropriately to bring the settlement value back within the allowable range. And when the monitored value of the settlement shows a decreasing trend, the thrust force is appropriately increased while still being within the allowable range, and the decreasing trend is suppressed.
Furthermore, the start of the hydraulic lifting device is adjusted according to the actual position of the shield machine underground, for example, in the area where the shield machine is tunneling or has finished reinforcing, the corresponding shield machine can stop working, only the hydraulic lifting device near the area where the shield machine is tunneling is reserved, and the hydraulic lifting devices are all located at the side or the rear of the shield machine or at the side and the rear of the shield machine. Namely, in the advancing process of the shield machine, the hydraulic lifting devices on the two sides of the shield machine are sequentially started, and when the reinforcement in the corresponding area is completed, the shield machine stops working.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (4)
1. An anti-sedimentation method for a shield machine to pass through an airport taxiway is characterized by comprising the following steps:
determining a traveling route of the shield tunneling machine;
determining an influence area of a shield tunneling machine advancing route;
digging an operation well outside an influence area of the shield tunneling machine;
digging a reinforcing channel in the operation well, wherein the reinforcing channel is parallel to the advancing route of the shield machine; the number of the reinforced channels is two, and the two groups of reinforced channels are respectively positioned on two sides of the advancing route of the shield machine; the number of the reinforced channels in each group is two or more;
and a plurality of hydraulic lifting devices are arranged in the reinforced channel at intervals to apply an upward thrust to the airport runway, and the distance between the hydraulic lifting devices is 1-1.2 m, so that the settlement of the airport runway in the advancing process of the shield tunneling machine is resisted.
2. The anti-settling method for the shield tunneling machine to cross the airport taxiway according to claim 1, wherein the method comprises the following steps: in the advancing process of the shield machine, the airport runway above the area where the shield machine is located is detected, the settlement value of the area is obtained, and when the settlement value exceeds a set threshold value, upward thrust in the area is increased.
3. The anti-settling method for the shield tunneling machine to cross the airport taxiway according to claim 1, wherein the method comprises the following steps: in the advancing process of the shield machine, the airport runway above the area where the shield machine is located is detected, the settlement value of the area is obtained, and when the settlement value exceeds a set threshold value, the lifting value of the corresponding hydraulic lifting device in the area is increased.
4. The anti-settling method for the shield tunneling machine to cross the airport taxiway according to any one of claims 1 or 3, wherein the method comprises the following steps: the hydraulic lifting devices in the reinforced channel are started according to the position sequence of the shield tunneling machine, and the driven hydraulic lifting devices are all positioned on the side and/or the rear of the shield tunneling machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010215194.2A CN111206938B (en) | 2020-03-24 | 2020-03-24 | Anti-settling method for shield tunneling machine to pass through airport taxiway |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010215194.2A CN111206938B (en) | 2020-03-24 | 2020-03-24 | Anti-settling method for shield tunneling machine to pass through airport taxiway |
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| CN111206938A CN111206938A (en) | 2020-05-29 |
| CN111206938B true CN111206938B (en) | 2022-05-13 |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102080548B (en) * | 2010-12-29 | 2013-04-03 | 上海隧道工程股份有限公司 | Construction method of tunnel to cross airport runway by shield method |
| RU2485318C1 (en) * | 2012-01-25 | 2013-06-20 | Константин Петрович Безродный | Method to construct station tunnels with low subsidence of earth surface |
| CN104533493B (en) * | 2015-01-14 | 2017-11-21 | 北京诚田恒业煤矿设备有限公司 | It is a kind of to be used to tunnel the shield support with back production |
| CN104807440B (en) * | 2015-05-15 | 2017-09-29 | 中铁二局工程有限公司 | A kind of Full-automatic high frequency rate surface subsidence monitoring method for airport |
| KR102064998B1 (en) * | 2017-07-07 | 2020-01-10 | 주식회사 뉴컨스텍 | Slip reduction type side connection steel pipe and linear and curved line hybrid type tunnel construction using it |
| CN107524454A (en) * | 2017-09-09 | 2017-12-29 | 左垒安 | Tunnelling supporting robot, matched bracket and method for protecting support |
| CN108222952A (en) * | 2017-12-18 | 2018-06-29 | 上海市基础工程集团有限公司 | Airport taxi runway subsidence control method in shield crossing operation |
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