CN110685705A - Normal-pressure opening method for shield machine - Google Patents
Normal-pressure opening method for shield machine Download PDFInfo
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- CN110685705A CN110685705A CN201911128666.4A CN201911128666A CN110685705A CN 110685705 A CN110685705 A CN 110685705A CN 201911128666 A CN201911128666 A CN 201911128666A CN 110685705 A CN110685705 A CN 110685705A
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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
- E21D9/08—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield
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Abstract
The embodiment of the invention provides a normal-pressure opening method of a shield machine, which comprises the following steps: arranging a plurality of hollow piles at intervals in a preset opening position along a preset direction, wherein the preset direction and the tunneling direction of the shield tunneling machine form an included angle; tunneling the shield tunneling machine to a preset opening position, and enabling a cutter head of the shield tunneling machine to extend into the hollow piles; two hollow piles positioned on the outermost side in the plurality of hollow piles are respectively a first hollow pile and a second hollow pile, the front end face of the cutter head has a first part positioned in the first hollow pile and a second part positioned in the second hollow pile along the orthographic projection in the direction parallel to the axis of the hollow pile, and the length of the first part is different from that of the second part; and opening the bin at normal pressure. The normal-pressure opening safety of the shield machine is high, and the shield machine has enough moving space to carry out maintenance operation of the shield machine.
Description
Technical Field
The invention relates to the technical field of tunnel construction, in particular to a normal-pressure opening method of a shield tunneling machine.
Background
In the tunnel construction process, after the shield machine tunnels to the set position, the shield machine needs to be overhauled or maintained so as to ensure that the shield machine can normally operate. Before the shield machine needs to be overhauled or maintained, the shield machine needs to be stopped at a set position to carry out excavation operation so that the shield machine can be opened, and a maintainer can conveniently enter the shield machine to carry out overhauling or maintenance.
The inventor researches and discovers that the existing shield tunneling machine at least has the following defects when in maintenance or repair:
the shield machine has few exposed parts in the external environment, and is inconvenient to overhaul or maintain.
Disclosure of Invention
The invention aims to provide a normal-pressure opening method of a shield machine, which can increase the exposed part of the shield machine in the environment and is convenient to overhaul or maintain.
Embodiments of the invention may be implemented as follows:
in a first aspect, an embodiment provides a normal-pressure opening method for a shield machine, which includes the following steps:
arranging a plurality of hollow piles at intervals in a preset opening position along a preset direction, wherein the preset direction and the tunneling direction of the shield tunneling machine form an included angle;
tunneling the shield tunneling machine to a preset opening position, and enabling a cutter head of the shield tunneling machine to extend into the hollow piles; two hollow piles positioned on the outermost side in the plurality of hollow piles are respectively a first hollow pile and a second hollow pile, the front end face of the cutter head has a first part positioned in the first hollow pile and a second part positioned in the second hollow pile along the orthographic projection in the direction parallel to the axis of the hollow pile, and the length of the first part is different from that of the second part;
and opening the bin at normal pressure.
In an optional embodiment, the construction step of arranging the plurality of hollow piles arranged at intervals includes:
and drilling holes at the preset open position to form a pouring hole, pouring concrete to form a foundation pile after a framework is placed in the pouring hole, and coring the foundation pile to form the hollow pile.
In an alternative embodiment, the step of coring the foundation pile comprises:
coring is performed at the final setting of the concrete.
In an alternative embodiment, the step of placing the framework in the pouring hole and then pouring concrete to form the foundation pile comprises the following steps:
splicing the reinforcement cage and the glass fiber reinforcement cage provided with the reinforcement structure to form a framework, lifting the framework to enable the framework to be in a vertical state, then removing the reinforcement structure, hoisting the framework into a pouring hole, and then pouring concrete in the pouring hole.
In an optional embodiment, the construction step of coring the foundation pile comprises the following steps:
and selecting a coring point which is not positioned on the axis of the pouring hole on the end surface of the foundation pile, and coring along the direction which passes through the coring point and is parallel to the axis of the pouring hole so as to ensure that the wall thickness of the hollow pile in the circumferential direction is different.
In an optional embodiment, the construction step of coring the foundation pile comprises the following steps:
and a coring point is determined on the end surface of each foundation pile, and the coring points of the plurality of foundation piles are positioned on the same straight line.
In an alternative embodiment, the hollow pile is pumped after the step of constructing the hollow pile and before the step of driving the shield machine to the preset cabin opening position.
In an alternative embodiment, the step of pumping water through the hollow pile comprises:
and a precipitation well is arranged to extract water in the precipitation well.
In an optional embodiment, the shield tunneling machine normal-pressure opening method further includes:
and before the step of tunneling the shield tunneling machine to the preset opening position, arranging plain piles between the adjacent hollow piles.
In an optional embodiment, the shield tunneling machine normal-pressure opening method further includes:
and after the step of tunneling the shield machine to the preset warehouse opening position and before the step of normal-pressure warehouse opening, grouting and sealing rings are performed between the duct piece close to the front shield of the shield machine and the tunnel wall.
The beneficial effects of the embodiment of the invention include, for example:
in summary, the embodiment provides a normal-pressure opening method for a shield machine, before tunnel excavation, a preset opening position of the shield machine is determined on a tunnel excavation path, so that opening preparation is completed before the shield machine reaches the preset opening position, and construction time is not easily prolonged. The shield machine is characterized in that a plurality of hollow piles arranged at intervals are arranged at a preset opening position, in the tunneling process of the shield machine, when the shield machine tunnels to a cutter head and extends into the plurality of hollow piles, namely the shield machine reaches the preset opening position, a maintainer can enter the cutter head position from the hollow piles, then a cabin door of a front shield is opened and enters a shield machine cabin, and the shield machine is overhauled and maintained. When the cutter head of the shield tunneling machine is positioned in the hollow pile, the length of the cutter head positioned in the first hollow pile and the length of the cutter head positioned in the second hollow pile are different in the radial direction of the cutter head, for example, the length of the cutter head positioned in the first hollow pile is smaller than the length of the cutter head positioned in the second hollow pile, namely, the part of the cutter head exposed in the second hollow pile is more, so that the maintenance of the cutter head is facilitated. And, after the cutter head that is located the second hollow pile overhauls and accomplishes, can rotate the cutter head, make the cutter head and the first hollow pile correspond and do not expose in the external environment wait to overhaul the part and get into the second hollow pile in, and can expose in the external environment to carry out more comprehensive maintenance to the cutter head. Because the blade disc is located the area difference in the different hollow pile, when the blade disc is located the less hollow pile of part that exposes in external environment, this hollow pile's intensity is bigger, and the face is difficult for collapsing, is guaranteeing that the face in the hollow pile has under the prerequisite of sufficient intensity promptly, can make the blade disc expose the part change in external environment through the position of adjustment blade disc to improve the flexibility of overhauing, it is more convenient to overhaul and maintain the operation.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic diagram of a cutter head, a hollow pile and a plain pile provided by an embodiment of the invention;
FIG. 2 is a cross-sectional view corresponding to FIG. 1;
FIG. 3 is a cross-sectional view of a hollow pile provided by an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a framework provided in an embodiment of the present invention.
Icon:
100-a first hollow pile; 110-middle hollow pile; 120-a second hollow pile; 130-second axis; 140-wall thickness; 200-plain piles; 300-a cutter head; 310-a first portion; 320-a second portion; 400-framework; 410-glass fiber reinforcement cage; 420-reinforcing ring; 430-a support frame; 500-first axis.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. indicate an orientation or a positional relationship based on that shown in the drawings or that the product of the present invention is used as it is, this is only for convenience of description and simplification of the description, and it does not indicate or imply that the device or the element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
Please refer to fig. 1 and fig. 2, this embodiment provides a normal-pressure opening method for a shield machine, which is used to open a shield machine cabin door at normal pressure to overhaul the shield machine during the shield machine excavation operation, and the method not only satisfies the structural strength of the tunnel face during the normal-pressure opening, ensures the safety, but also improves the convenience of overhaul, and can perform more comprehensive overhaul operation on the cutter head 300.
The normal-pressure opening method of the shield tunneling machine provided by the embodiment comprises the following steps:
arranging a plurality of hollow piles at intervals in a preset opening position along a preset direction, wherein the preset direction and the tunneling direction of the shield tunneling machine form an included angle; for example, in this embodiment, the preset direction is perpendicular to the tunneling direction, that is, an included angle between the preset direction and the tunneling direction is 90 degrees, which is convenient for determining the preset opening position, and ensures that the cutter head 300 can be better matched with a plurality of hollow piles. Obviously, in other embodiments, the angle between the preset direction and the heading direction may not be limited to 90 degrees.
Tunneling the shield tunneling machine to a preset opening position, and enabling a cutter head 300 of the shield tunneling machine to extend into a plurality of hollow piles; for convenience of description, two hollow piles positioned at the outermost side among the plurality of hollow piles are respectively the first hollow pile 100 and the second hollow pile 120, an orthographic projection of the front end surface of the cutter head 300 along a direction parallel to the axis of the hollow pile has a first part 310 positioned in the first hollow pile 100 and a second part 320 positioned in the second hollow pile 120, the length of the first part 310 is different from that of the second part 320, and the length of the first part 310 and the length of the second part 320 are parallel to the radial direction of the cutter head 300.
And after the shield tunneling machine tunnels to a preset opening position, opening the cabin at normal pressure.
According to the normal-pressure opening method of the shield machine, the preset opening position of the shield machine is determined on the tunnel excavation path before the tunnel excavation, so that opening preparation work can be completed before the shield machine reaches the preset opening position, the construction time is not easily prolonged, the construction of the preset opening position and the excavation operation of the shield machine are synchronously performed, the two are not interfered with each other, hollow pile arrangement is not required after the shield machine stops operating, and the construction period is not easily prolonged. The shield machine tunneling process comprises the steps that a plurality of hollow piles arranged at intervals are arranged in a preset warehouse opening position along a preset direction, when the shield machine tunnels the hollow piles, the shield machine continues to operate, the cutter head 300 extends into the hollow piles after the partial structures of the hollow piles are damaged, namely the shield machine reaches the preset warehouse opening position, at the moment, a maintainer can enter the cutter head 300 from the hollow piles, then the front shield is opened, the front shield door enters the shield machine cabin, and the shield machine is overhauled and maintained. When the cutterhead 300 of the shield tunneling machine is located in the hollow pile, in the radial direction of the cutterhead 300, the length of the cutterhead 300 located in the first hollow pile 100 is different from the length of the cutterhead 300 located in the second hollow pile 120, for example, the length of the cutterhead 300 located in the first hollow pile 100 is smaller than the length of the cutterhead 300 located in the second hollow pile 120, that is, the portions of the cutterhead 300 exposed in the second hollow pile 120 are more, a larger moving space can be provided in the second hollow pile 120, and the maintenance and repair of the cutterhead 300 are facilitated. And, after the maintenance of the cutter head 300 in the second hollow pile 120 is completed, the cutter head 300 may be rotated, so that the portion of the cutter head 300, which corresponds to the first hollow pile 100 and is not exposed to the outside environment to be maintained, enters the second hollow pile 120 and can be exposed to the outside environment, thereby performing more comprehensive maintenance on the cutter head 300. Because the area that blade disc 300 is located different hollow piles is different, when blade disc 300 is located the less hollow pile of part that exposes in external environment, this hollow pile's intensity is bigger, and the face is difficult for collapsing, is guaranteeing that the face in the hollow pile has under the prerequisite of sufficient intensity promptly, can make blade disc 300 expose the area change in external environment through the position of adjustment blade disc 300, both guarantee the security of maintenance, also guarantee to have enough big space in order to carry out more comprehensive maintenance to blade disc 300.
In this embodiment, optionally, the construction step of setting up many hollow piles of interval arrangement includes:
and drilling a hole at a preset opening position to form a pouring hole, pouring concrete to form a foundation pile after the framework 400 is placed in the pouring hole, and coring the foundation pile to form the hollow pile.
Optionally, during hollow pile construction, after the preset warehouse opening position is determined according to the operation condition of the shield tunneling machine, a plurality of hollow piles are arranged at the preset warehouse opening position, and the number of the hollow piles and the inner diameter of each hollow pile are set as required. In order to facilitate construction and determine the tunneling position of the cutter head 300, the hollow piles are arranged to be coaxial, that is, the axes of the hollow piles are all located in the same plane, and the tunneling direction of the shield tunneling machine when reaching the preset opening position is perpendicular to the plane. The distance between adjacent hollow piles is set as required, and it is only required to ensure that two hollow piles positioned at the outermost side can accommodate part of the cutter head 300.
In this embodiment, the number of the hollow piles is three, and in the preset direction, the three hollow piles are the first hollow pile 100, the middle hollow pile 110 and the second hollow pile 120 respectively.
Referring to fig. 3, in the present embodiment, optionally, after the pouring hole is excavated, an axis of the pouring hole extends substantially in a vertical direction, the pouring hole is a cylindrical hole, and the axis of the pouring hole is set as the first axis 500. Then the framework 400 is hoisted and placed into the pouring hole. Referring to fig. 4, when the framework 400 is manufactured, in order to facilitate the cutter head 300 to enter the hollow pile in a rotary drilling manner, the framework 400 comprises a glass fiber reinforcement cage 410 and a reinforcement cage, the glass fiber reinforcement cage 410 and the reinforcement cage are spliced into a whole, the positions where the cutter head 300 contacts the hollow pile are both the glass fiber reinforcement cage 410, damage to the cutter head 300 is avoided, the cutter head 300 is convenient to enter the hollow pile after the hollow pile is damaged, and continuous tunneling after the cutter head 300 penetrates the hollow pile is facilitated.
When the framework 400 is hoisted into the pouring hole, the framework 400 is long in length and low in strength, so that the situations of bending, breaking or scattering and the like can be avoided in the hoisting process, and before hoisting, a reinforcing structure is arranged inside the glass fiber reinforcement cage 410. The reinforcing structure comprises a reinforcing ring 420 and a triangular support frame 430, the reinforcing ring 420 is sleeved outside the glass fiber reinforcement cage 410, and the support frame 430 is located in the glass fiber reinforcement cage 410 and is fixedly connected with the reinforcing ring 420, so that the deformation of the glass fiber reinforcement cage 410 can be weakened. After the framework 400 is manufactured, the framework 400 is laid on the ground, two lifting points are arranged on the framework 400, the two lifting points are hooked by using lifting equipment to be lifted, and the framework 400 is lifted to a vertical state from a horizontal state. After the framework 400 is hoisted to be in a vertical state, before the framework 400 is placed into a pouring hole, the reinforcing ring 420 and the supporting frame 430 on the framework 400 are removed, so that the influence on the normal operation of the cutter head 300 due to the contact with the cutter head 300 is avoided.
Optionally, in order to monitor the deformation of the hollow pile and avoid the hollow pile from deflecting, an inclinometer pipe is disposed in the framework 400.
Optionally, after the framework 400 is hoisted into the pouring hole, concrete is poured to form a foundation pile. When the concrete is finally set, coring operation is performed. When coring operation is performed, if coring is early, the strength of concrete is low, the framework 400 is easy to twist together, the integrity of the foundation pile is damaged, and the expected effect cannot be achieved; and the core is too late, the concrete strength is high, the loss of mechanical equipment is increased, and the construction speed is reduced. Therefore, when the concrete is finally set, coring is carried out, the framework 400 cannot be twisted together, the loss of mechanical equipment cannot be increased, the construction quality is high, and the hollow pile forming quality is high.
Referring to fig. 3, optionally, during coring, the core body is taken out to be a cylinder, that is, after coring, a cylindrical cavity is formed in the foundation pile, and the cylindrical cavity is a hollow pile. Firstly, marking a coring point on the circular end surface of the foundation pile, wherein the coring point is not positioned on the first axis 500 of the pouring hole, and the coring point is the circle center of the cross section outline of the hollow pile, namely the cross section outline of the hollow pile and the cross section outline of the pouring hole are eccentrically arranged. Coring is performed along a direction which passes through the coring point and is parallel to the first axis 500, the axis of the hollow pile is the second axis 130, the second axis 130 is parallel to and does not coincide with the first axis 500, so that the wall thickness 140 of the hollow pile along the radial direction of the hollow pile is different in the circumferential direction, and the wall thickness 140 of the hollow pile on the side close to the cutter head 300 is smaller than the wall thickness 140 of the hollow pile on the side far away from the cutter head 300, in other words, the thickness of the position of the inner palm surface of the hollow pile is larger. Due to the structural design, when the cutter head 300 drills into the hollow pile, the wall thickness 140 of the hollow pile in contact with the cutter head 300 is thin, so that the resistance of the cutter head 300 is small, the cutter head is convenient to tunnel into the hollow pile, and the abrasion of the cutter head 300 is reduced. In the process of opening the warehouse, the tunnel face is subjected to extrusion force from outside to inside, and the hollow pile at the position where the tunnel face is located is thick, so that the structural strength of the tunnel face is higher, the supporting effect is better, collapse is not easy to occur when the warehouse is opened under normal pressure, and the safety is improved.
Obviously, the plurality of hollow piles may not be completely arranged in an eccentric structure. For example, in this embodiment, the first hollow pile 100 and the middle hollow pile 110 are arranged in an eccentric configuration, and the second hollow pile 120 is arranged in a concentric configuration.
Optionally, at least one plain pile 200 is arranged between adjacent hollow piles, and the plain pile 200 is also a solid pile, i.e., the core-taking operation is not performed after the foundation pile construction is completed. Through setting up plain stake 200, the structural strength of the position of opening the storehouse is predetermine in the reinforcing, and the normal pressure operation of opening the storehouse is safe and reliable more.
In this embodiment, optionally, after the step of completing the hollow pile construction and before the step of driving the shield tunneling machine to the preset opening position, the hollow pile is pumped. The operation of drawing water between two steps neither can influence the shaping of hollow pile, simultaneously, can also guarantee that there is not groundwater to enter into the shield structure machine when the shield structure machine tunnels to predetermineeing the position of opening the warehouse, can not influence the operation of maintaining in the warehouse.
And further, the step of pumping water to the hollow pile comprises the steps of arranging dewatering wells around the hollow pile, selecting the quantity of the dewatering wells as required, arranging water pumps in the dewatering wells after the dewatering wells are arranged, and pumping out water by using the water pumps to realize the reduction of the water level in the hollow pile, wherein the position of opening the shield machine is free from underground water, or the height of the underground water is lower than the position of opening the shield machine, so that the normal operation of opening the shield machine is not influenced.
In this embodiment, optionally, after the step of the shield tunneling machine tunneling to the preset opening position and before the step of the normal-pressure opening, a grouting and ring sealing is performed between the duct piece close to the front shield of the shield tunneling machine and the tunnel wall. Underground water is prevented from entering the anterior shield from the space between the tunnel wall and the duct piece in the opening process. Optionally, annular grouting is performed between the ninth, tenth and eleven annular duct pieces from the last to the last and the tunnel wall, namely, an annular water stop belt is formed after grouting is completed, and the rear water stop effect of the duct pieces is enhanced.
In this embodiment, optionally, the condition of opening the warehouse is confirmed before opening the warehouse, and normal-pressure warehouse opening is performed after the condition of safe warehouse opening is achieved.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. The normal-pressure opening method of the shield machine is characterized by comprising the following steps:
arranging a plurality of hollow piles at intervals at a preset opening position along a preset direction, wherein an included angle is formed between the preset direction and the tunneling direction of the shield tunneling machine;
the shield machine tunnels to the preset opening position, and a cutter head of the shield machine extends into the hollow piles; two hollow piles positioned at the outermost side in the plurality of hollow piles are respectively a first hollow pile and a second hollow pile, an orthographic projection of the front end face of the cutter head along the direction parallel to the axis of the hollow pile is provided with a first part positioned in the first hollow pile and a second part positioned in the second hollow pile, and the length of the first part is different from that of the second part;
and opening the bin at normal pressure.
2. The normal-pressure opening method of the shield tunneling machine according to claim 1, wherein the construction step of arranging the plurality of hollow piles arranged at intervals comprises the following steps:
and drilling holes at the preset open position to form pouring holes, pouring concrete into the pouring holes after a framework is placed into the pouring holes to form foundation piles, and coring the foundation piles to form the hollow piles.
3. The normal-pressure opening method of the shield tunneling machine according to claim 2, wherein the construction step of coring the foundation pile comprises:
coring is performed at the final setting of the concrete.
4. The normal-pressure opening method of the shield tunneling machine according to claim 2, wherein the construction step of pouring concrete to form a foundation pile after the framework is placed in the pouring hole comprises the following steps:
splicing a reinforcement cage and a glass fiber reinforcement cage provided with a reinforcing structure to form the framework, hoisting the framework to enable the framework to be in a vertical state, then dismantling the reinforcing structure, hoisting the framework into a pouring hole, and then pouring concrete in the pouring hole.
5. The normal-pressure opening method of the shield tunneling machine according to claim 2, wherein in the construction step of coring the foundation pile, the construction steps of:
and selecting a coring point which is not positioned on the axis of the pouring hole on the end surface of the foundation pile, and coring along the direction which passes through the coring point and is parallel to the axis of the pouring hole so as to ensure that the wall thickness of the hollow pile in the circumferential direction is different.
6. The normal-pressure opening method of the shield tunneling machine according to claim 2, wherein in the construction step of coring the foundation pile, the construction steps of:
and determining a coring point on the end surface of each foundation pile, wherein the coring points of the foundation piles are positioned on the same straight line.
7. The normal-pressure opening method of the shield tunneling machine according to claim 1, wherein water is pumped to the hollow pile after the step of constructing the hollow pile is completed and before the step of tunneling the shield tunneling machine to the preset opening position.
8. The normal-pressure opening method of the shield tunneling machine according to claim 7, wherein the step of pumping water to the hollow pile comprises the steps of:
and arranging a precipitation well, and extracting water in the precipitation well.
9. The normal-pressure opening method of the shield machine according to claim 1, further comprising:
and before the step of tunneling the shield tunneling machine to the preset opening position, arranging plain piles between the adjacent hollow piles.
10. The normal-pressure opening method of the shield machine according to claim 1, further comprising:
and after the step of tunneling the shield machine to the preset warehouse opening position and before the step of normal-pressure warehouse opening, grouting and ring sealing are carried out between the duct piece close to the front shield of the shield machine and the tunnel wall.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111335910A (en) * | 2020-03-04 | 2020-06-26 | 海南大学 | Method for opening cabin of shield tunneling machine to overhaul and replace cutter |
| CN111335910B (en) * | 2020-03-04 | 2021-07-23 | 海南大学 | Method for opening cabin of shield tunneling machine to overhaul and replace cutter |
| CN111502672A (en) * | 2020-04-22 | 2020-08-07 | 中建八局轨道交通建设有限公司 | Construction method for stratum reinforcement before opening of shield cutter head |
| CN111502672B (en) * | 2020-04-22 | 2022-03-04 | 中建八局轨道交通建设有限公司 | Construction method for stratum reinforcement before opening of shield cutter head |
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| CN110685705B (en) | 2021-05-11 |
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