NL2023905B1 - Plane sliding advancing device for shield machine - Google Patents
Plane sliding advancing device for shield machine Download PDFInfo
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- NL2023905B1 NL2023905B1 NL2023905A NL2023905A NL2023905B1 NL 2023905 B1 NL2023905 B1 NL 2023905B1 NL 2023905 A NL2023905 A NL 2023905A NL 2023905 A NL2023905 A NL 2023905A NL 2023905 B1 NL2023905 B1 NL 2023905B1
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- shield machine
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- 230000003068 static effect Effects 0.000 claims description 47
- 230000008602 contraction Effects 0.000 claims description 15
- 238000006073 displacement reaction Methods 0.000 claims description 12
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 230000002708 enhancing effect Effects 0.000 claims 8
- 239000002689 soil Substances 0.000 claims 3
- 238000000034 method Methods 0.000 abstract description 20
- 238000010276 construction Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 7
- 230000007812 deficiency Effects 0.000 abstract description 2
- 238000005265 energy consumption Methods 0.000 abstract description 2
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- 238000005096 rolling process Methods 0.000 description 5
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- 238000006243 chemical reaction Methods 0.000 description 2
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- 238000009412 basement excavation Methods 0.000 description 1
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- 230000005641 tunneling Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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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
- E21D9/0621—Shield advancing devices
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- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The present invention is directed to overcoming at least one of the deficiencies of the prior art, providing a plane sliding advancing device for a shield machine, wherein the advancing device comprises a supporting frame, a base plate provided on an upper side of the supporting frame and configured to support the shield machine, a plurality of sliding components and a plurality of resistance-increasing components provided on a lower side of the supporting frame, and a counterforce device provided at the tail end of the supporting frame, wherein the shield machine is provided with a telescopic device at one end. When a telescopic device is extended and advanced, the resistance-increasing component is activated to increase the resistance, so that the acceleration of the shield machine relative to a base plate is greater than the acceleration of a supporting frame relative to the ground; when the telescopic device contracts, the resistance-increasing component is activated to reduce the resistance, so that the acceleration of the shield machine relative to the base plate is less than the acceleration of the supporting frame relative to the ground. The advancing device of the present invention changes the friction between the advancing device and the ground according to different advancing processes, and is capable of realizing the continuous advancement, further saving energy consumption and reducing the construction cost.
Description
FIELD OF THE INVENTION The present invention relates to the field of tunnel engineering technology, and in particular, to a plane sliding advancing device for a shield machine.
BACKGROUND OF THE INVENTION In recent years, with the rapid development of cities, the construction of urban subways has developed rapidly, and the construction of urban rail transit has become more and more hot. The shield tunneling construction is the main method adopted by urban subway construction, but in the case of some complex geology, other construction methods need to be used for tunnel construction. When the shield machine operates in the tunnel that has been excavated, it is necessary to air-push the shield machine through the tunnel section that has been excavated. In order to ensure that the shield machine is smoothly air-pushed through the tunnel section that has been excavated, the concrete guide in the tunnel that has been excavated is used as the shield support, and the rail laid on the guide is used as the shield travel track. A counterforce hole is provided on the guide rail using two hydraulic jacks as the shield advancing power, and cooperates with a counterforce frame matched with the counterforce hole to air-push the shield body to move forward on the track. The application No. CN102337900A discloses a circulating matting type shield air-pushing method. The device is provided with a bracket at the bottom of the shield machine, two rows of vertical jacks are provided on both sides, and the horizontal jack transmits force to the bracket through the counterforce device. The horizontal jack force pushes the shield machine to move forward on the bracket, then activates the vertical jack to lift the shield machine, the horizontal jack contracts and pushes the bracket to move forward, the vertical jack contracts, and the shield machine falls on the bracket and pushes forward repeatedly. According to the above device, since the bracket is in contact with the ground. The bracket moves forward to have a sliding friction with the ground, which is extremely easy to cause damage to the bracket. The shield machine is generally up to thousands of tons, and the bracket moves forward only using an external large hydraulic lifting device to completely separate the shield machine from the bracket, which has low construction efficiency, low recycling rate, high consumption and high cost in actual engineering.
SUMMARY OF THE INVENTION The present invention is directed to overcoming at least one of the deficiencies of the prior art, providing a plane sliding advancing device for a shield machine to achieve the purpose of continuously advancing and improving advancing efficiency.
The technical solution adopted by the present invention is to provide a plane sliding advancing device for a shield machine, comprising a supporting frame, a base plate provided on an upper side of the supporting frame and configured to support the shield machine, a plurality of sliding components and a plurality of resistance- increasing components provided on a lower side of the supporting frame, and a counterforce device provided at the tail end of the supporting frame, wherein the shield machine is provided with a telescopic device at one end, and the telescopic device realizes the advancing of the shield machine with the support of the counterforce device.
The shield machine and the telescopic device have a total of mass of Md, the supporting frame has a mass of Mzc, the base plate has a mass of Mzb, the sliding component is has a mass of Mg, the resistance-increasing component has a mass of Mzz, the counterforce device has a mass of Mf; the friction coefficient between the shield machine and the base plate is Udz, the friction coefficient between the base plate and the supporting frame is Uzz, the friction coefficient between the sliding component and the ground is Ugd, the friction coefficient between the resistance- increasing component and the ground is Uzd, the gravitational acceleration is G, the outward thrust and the inward contraction force of the telescopic device are Ft and Fs, respectively, the contact portion between the ground and the sliding component is subjected to a total of pressure of Fg, and the contact portion between the ground and the resistance-increasing component is subjected to a total of pressure of Fz.
The maximum static friction between the shield machine and the base plate Fdz=Md-GxUdz is greater than the maximum static friction between the base plate and the supporting frame Fzz=(Md+Mzb)-GxUzz, and Md+Mzc+Mzb+Mg+Mzz+Mf=Fg+Fz, Ugd<Uzd; In the state where the telescopic device has a thrust of Ft: (1)
In the state where the telescopic device has a contraction force of Fs: (2) The supporting frame is mainly used to bear the shield machine at the upper end and support the ground.
The base plate can be fixed in the sliding groove of the supporting frame by providing a sliding groove on both sides of the supporting frame.
The sliding component and the resistance-increasing component are provided at the bottom of the supporting frame.
The friction between the resistance-increasing component and the ground is increased and decreased by adjusting the resistance- increasing component, thereby controlling the magnitude of the absolute value of the displacement acceleration between the shield machine and the supporting frame when the shield machine and the supporting frame are subjected to a thrust or a tension, so that the shield machine moves forward.
The counterforce device is mainly used as a fulcrum for pushing the shield machine on the support, wherein the forward direction of the shield machine is the head end, and the other end is the tail end.
The counterforce device can be buckled or otherwise fixed at the tail end of the supporting frame by a screw fixing member or a chute, and the counterforce device can be embedded in the tail end of the supporting frame in a nesting manner, etc.
The telescopic device that advances the shield machine to move forward is connected to the counterforce device at one end, and is installed on the shield machine at the other end to advance the shield machine forward.
The specific method of the present invention is that when the advancing is required, the relative movement between the advancing device and the ground is minimized, so that the relative movement displacement of the shield machine relative to the ground is maximized.
Therefore, during advancing, it is necessary to increase the friction between the advancing device and the ground, and most preferably, increase the static friction between the resistance-increasing component and the ground to be greater than or equal to the sum of the thrust required for acceleration when the shield machine is activated forward and the friction between the base plate on the lower side of the shield machine and the supporting frame.
After the advancing is completed once, the advancing device itself needs to move forward.
At this time, the advancing device can be driven to move forward by the contraction force when the telescopic device contracts.
In order to reduce the friction between the advancing device and the ground, the resistance-increasing component needs to contract.
The friction between the resistance-increasing component and the ground is reduced so as to partly transfer the gravity of the shield machine, the base plate and the supporting frame supported by the resistance-increasing component to the sliding component.
The friction coefficient between the sliding component and the ground is much smaller than the friction coefficient between the resistance-increasing component and the ground.
The mass of the shield machine is much more than the sum of the mass of the supporting frame, the sliding component and the resistance-increasing component.
When the telescopic device contracts, the tension of the shield machine and the thrust of the supporting frame are the same in magnitude and opposite in direction.
The displacement acceleration of the shield machine is as follows: the tension is minus the friction between the base plate and the supporting frame and then is divided by the sum of the weight of the shield machine and the base plate.
The displacement acceleration of the supporting frame, the resistance-increasing component and the sliding component is as follows: the tension is minus the friction between the base plate and the supporting frame, then is minus the friction between the sliding component and the ground and the friction between the resistance-increasing component and the ground, and then the obtained value is divided by the mass of the supporting frame, the sliding component, the resistance-increasing component and the counterforce device.
Therefore, the friction between the resistance-increasing component and the ground is reduced.
When the output thrust of the telescopic device is constant, the displacement acceleration of the supporting frame, the sliding component and the resistance-increasing component can be increased; the resistance-increasing component contracts, and the friction between the resistance- increasing component and the ground is reduced until the displacement acceleration of the supporting frame, the sliding component and the resistance-increasing component is greater than the acceleration of the shield machine.
The telescopic device starts to contract, and the shield machine moves backward.
The supporting frame, the supporting frame, the sliding component, the resistance-increasing component and the counterforce device moves forward.
The backward relative displacement distance of the shield machine is smaller than the forward distance of the supporting frame, the sliding component, the resistance-increasing component and the counterforce device.
The shield machine and the advancing device move forward relative to the ground in combination with the two sliding processes.
Further, the supporting frame comprises a supporting plate provided on the lower side of the base plate and parallel to the base plate and a plurality of sets of snap plates perpendicular to the supporting plate and provided at intervals, wherein each set of snap plates comprises a first snap plate and a second snap plate which are parallel to each other, the sliding component comprises rollers and roller shafts provided at both ends of the roller and configured to install the rollers, the two roller 5 shafts are rotationally connected with the first snap plate and the second snap plate, respectively.
The transverse cross-sectional view of the supporting plate and the snap plate in the vertical direction is generally H-shaped. The supporting plate is horizontally provided, and is provided with a plurality of sets of snap plates at the bottom surface.
Each set of snap plates comprises a first snap plate and a second snap plate, and an installing position is formed therebetween. The sliding component is provided in the installing position. The sliding component can be implemented in other forms, such as the installation of a plurality of small rollers on the roller shaft, in addition to the above roller form. Other similar devices that can achieve the sliding of the advancing device are all within the scope of protection of the present invention.
Baffle plates integrally formed or fixedly connected with the snap plates on both sides are further provided at both sides of the supporting plate. The baffle plates are provided on the upper side of the supporting plate, and the opposite base plate of the baffle plate has a certain vertical height to prevent the shield machine from sliding sideways and also prevent the base plate from sliding sideways, so that the base plate can only move forward and backward.
Further, the supporting plate is provided with a plurality of sets of runner components configured to reduce the friction between the supporting plate and the base plate, a runner groove is provided on the upper side of the supporting plate, the runner component comprises a plurality of runners and rotating shafts provided at both ends of the runners, and the rotating shafts are rotationally connected with the side surface of the runner groove.
The runner component is provided on the supporting plate. When a support is placed on the supporting plate, the runner component plays the role of supporting the support. When the support moves relative to the supporting plate, the friction between the supporting plate and the base plate is reduced by the rotation of the runner component. The runner groove is a concave groove that is provided on a side of the supporting plate. The runner component is provided in a plurality of rows in the advancing direction of the shield. Preferably, a column of runner components is provided at the left and right ends and the middle of the supporting plate, respectively.
The number of runners set by each set of runner components is greater than or equal to two, preferably three. The runner and the runner shaft can be integrally formed, and only the runner shaft and the inner side of the runner groove are required to be rotationally connected; or the runner shaft and the runner groove are rotationally connected, and the runner shaft and the inner side of the runner groove are fixedly connected.
Preferably, the resistance-increasing component is a jack.
The resistance-increasing component may be a telescopic supporting device.
Further, the telescopic supporting device comprises a top supporting component and a telescopic bottom supporting component installed below the top supporting component and configured to increase or decrease the maximum static friction between the resistance-increasing component and the ground, when it is desired to increase the maximum static friction between the resistance-increasing component and the ground, the bottom supporting component extends, and when it is desired to reduce the maximum static friction between the resistance-increasing component and the ground, the bottom supporting component contracts.
The adjustment of the stress point at the bottom of the advancing device can be realized by adjusting the bottom supporting component. When the bottom supporting component is extended, a part of the pressure of the sliding component is transferred to the resistance-increasing component, and the resistance-increasing component plays a major stress role. When the bottom supporting component is shortened, and a part of the pressure that the resistance-increasing component is subjected to is transferred to the sliding component, so that the sliding component plays a major supporting role, reducing the sum of the friction between the resistance- increasing component and the ground and the friction between the sliding component and the ground. Therefore, by adjusting the telescopic amount of the resistance- increasing component, the stress of the sliding component and the resistance- increasing component can be balanced, and the flexible adjustment of the friction between the advancing device and the ground can be realized.
Further, the upper portion of the base plate is provided with a groove configured to prevent the shield machine from rolling laterally, the groove is provided with a rubber pad which increases the maximum static friction between the shield machine and the groove to prevent longitudinally relative movement of the shield machine and the base plate under the action of thrust and tension.
Since the shield machine generally has a large mass, once the lateral displacement occurs, the entire excavation advancement is greatly affected. Therefore, the present invention provides a longitudinal groove in the middle of the base plate, which is raised on both sides thereof by a certain height, so that the shield machine can be longitudinally placed in the groove. The convex portions on both sides of the support form a baffle plate, which can effectively prevent the shield machine from rolling laterally, so that the advancing process is more stable. The shape of the groove can be designed according to the shape of the shield machine, so that the groove is more suitable for the shield machine, and the shield machine is stably advanced. By providing a rubber pad, friction can be increased and wear between rigid structures can be reduced.
Further, the counterforce device is a metal plate fixed at the tail end of the advancing device. Preferably, the metal plate is a rectangular steel plate. By fixing the steel plate vertically at the tail end of the supporting frame, one end of the telescopic device is fixed to the steel plate to form a stress point of the telescopic device, and the shield machine is pushed forward.
Further, the telescopic device is a hydraulic push cylinder, and the hydraulic push cylinder provides a thrust and a tension for the shield machine to continuously advance the shield machine.
The present invention further provides a plane sliding advancing method for a shield machine, which implemented using the above advancing device; the advancing method is as follows: when the telescopic device is extended and advanced, activating the resistance-increasing component to increase the resistance, so that the acceleration of the shield machine relative to a base plate is greater than the acceleration of a supporting frame relative to the ground; when the telescopic device contracts, activating the resistance-increasing component to reduce the resistance, so that the acceleration of the shield machine relative to the base plate is less than the acceleration of the supporting frame relative tothe ground.
Specifically, the shield machine and the telescopic device have a total of mass of Md, the supporting frame has a mass of Mzc, the base plate has a mass of Mzb, the sliding component is has a mass of Mg, the resistance-increasing component has a mass of Mzz, the counterforce device has a mass of Mf; the friction coefficient between the shield machine and the base plate is Udz, the friction coefficient between the base plate and the supporting frame is Uzz, the friction coefficient between the sliding component and the ground is Ugd, the friction coefficient between the resistance-increasing component and the ground is Uzd, the gravitational acceleration is G, the outward thrust and the inward contraction force of the telescopic device are Ft and Fs, respectively, the contact portion between the ground and the sliding component is subjected to a total of pressure of Fg, and the contact portion between the ground and the resistance-increasing component is subjected to a total of pressure of Fz.
The advancing method comprises the steps of: S1: plane sliding the shield machine onto the base plate of the advancing device, and fixing the telescopic device at one end of the shield machine to the counterforce device; S2: activating the resistance-increasing component to increase the resistance, so that the maximum static friction between the resistance-increasing component and the ground is increased, and the maximum static friction resistance (Fmzd) of the plane sliding advancing device for the shield machine and the ground satisfies: S3: stopping the resistance-increasing component from continuing to increase the maximum static friction value of the resistance-increasing component and the ground, activating the telescopic device, applying the thrust Ft1 to push the shield machine and the base plate to move forward, completing an advancing step, and stopping advancing the telescopic device; S4: activating the resistance-increasing component to reduce the resistance, so that the maximum static friction resistance between the resistance- increasing component and the ground is reduced, and the maximum static friction resistance (Fmzd) of the plane sliding advancing device for the shield machine and the ground satisfies: S5: stopping the resistance-increasing component from reducing the resistance; activating the telescopic device in which the contraction force Fs1 begins to contract, and completing a contracting step; S6: repeating step S2, step S3, step S4, and step S5 until the shield machine reaches the designated position.
Further, the manner in which the resistance of the resistance-increasing component is increased in the step S2 is to extend the height of the resistance- increasing component and increase the stress of the resistance-increasing component; in the step S3, stopping the resistance-increasing component from continuing to increase the maximum static friction between the resistance-increasing component and the ground is realized by stopping extending the height of the resistance- increasing component; in the step S4, reducing the maximum static friction resistance between the resistance-increasing component and the ground is realized by shortening the height of the resistance-increasing component.
Further, the resistance-increasing component is activated to increase the resistance in the step S2 so that the static friction between the resistance-increasing component and the ground is greater than or equal to the sum of the thrust required for acceleration when the shield machine is activated forward and the friction between the base plate on the lower side of the shield machine and the supporting frame.
Further, the resistance-increasing component is activated to reduce the resistance in the step S4 so that the static friction between the resistance-increasing component and the ground is less than or equal to the sum of the thrust required for acceleration when the shield machine is activated forward and the friction between the base plate on the lower side of the shield machine and the supporting frame.
Further, the advancing method further comprises the step of placing the plane sliding advancing device for the shield machine on the treated road surface.
Compared with the prior art, the beneficial effects of the present invention are as follows.
(1) The present invention can flexibly adjust the maximum static friction between the advancing device and the ground for different advancing processes by simultaneously providing the sliding component and the resistance-increasing component at the bottom of the supporting frame, thereby realizing the adjustment of the advancing speed. It is also possible to realize the conversion of the supporting function between different components and extend the service life of the advancing device.
(2) The advancing device of the present invention changes the maximum static friction between the advancing device and the ground according to different advancing processes, and realizes the overall circularly continuous advancement of the advancing device and the shield machine through the extension and contraction functions of the hydraulic cylinder provided by the shield machine, making full use of resource machinery and reducing the additional cost of a mechanical device.
(3) The present invention provides a groove in the middle of the support, which is raised on both sides thereof, so that the shield machine can be longitudinally placed in the groove. The convex portions on both sides of the support form a baffle plate, which can effectively prevent the shield machine from rolling laterally, so that the advancing process is more stable.
(4) The present invention changes all the friction of the supporting device by adjusting the common pressure of the sliding component and the resistance-increasing component, and controls different displacement acceleration of the advancing device and the shield machine, so that the shield machine moves forward smoothly.
(5) Compared with the prior art, the present invention can ensure that the shield machine and the sliding component do not need vertical displacement, reduce the output of the vertical force, and prevent lifting and lowering the vertical displacement of the shield machine with the help of a large lifting device due to the overweight of the shield machine.
(6) The advancing method of the present invention only needs to adjust the resistance of the resistance-increasing component to realize the maximum static friction between the advancing device and the ground in different advancing processes, and the conversion of the stress between the resistance-increasing component and a sliding device can be realized by adjusting the height of the resistance-increasing component. The operation is simple, the wear on the bottom of the advancing device is reduced, and the service life is improved. The contraction force of the telescopic device is utilized, a waste of energy consumption is reduced, and the advancing efficiency is improved.
BRIEF DESCRIPTION OF THE DRAWINGS The present disclosure will now be further described with reference to the accompanying drawings.
FIG. 1 is a perspective schematic view illustrating an advancing device according to the present invention.
FIG. 2 is a schematic view illustrating the structure of an advancing device according to the present invention after the shield machine is installed.
FIG. 3 is a side schematic view illustrating the structure of an advancing device according to the present invention.
FIG. 4 is an enlarged schematic view illustrating a runner component of FIG.
1.
FIG. 5 is a schematic view illustrating the bottom structure of an advancing device according to the present invention.
FIG. 6 is a schematic view illustrating the structure of a resistance- increasing component according to the present invention.
FIG. 7 is another schematic view illustrating the bottom structure of an advancing device according to the present invention.
FIG. 8 is a schematic view illustrating a plane sliding advancing method for a shield machine according to the present invention.
DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS The drawings of the present invention are for illustrative purposes only and are not to be construed as limiting the present invention. In order to better illustrate the following embodiments, some components of the drawings may be omitted, enlarged or reduced, and do not represent the dimensions of actual products; it may be understood that some known structures in the drawings and their descriptions may be omitted to those skilled in the art.
Embodiment 1 The embodiment provides a plane sliding advancing device for a shield machine, which can achieve the purpose of continuously advancing and improving advancing efficiency.
The technical solution adopted by the present invention is as shown in FIG. 1 to FIG. 2, which provides a plane sliding advancing device for a shield machine, comprising a supporting frame 1, a base plate 2 provided on an upper side of the supporting frame 1 and configured to support the shield machine 10, a plurality of sliding components 3 and a plurality of resistance-increasing components 4 provided on a lower side of the supporting frame 1, and a counterforce device 5 provided at the tail end of the supporting frame 1, wherein the shield machine 10 is provided with a telescopic device 6 at one end, the telescopic device 6 is a hydraulic push cylinder, and the hydraulic push cylinder provided a thrust and a tension. The hydraulic push cylinder 6 realizes the advancing of the shield machine 10 with the support of the counterforce device 5.
The shield machine 10 and the telescopic device 6 have a total of mass of Ma, the supporting frame 1 has a mass of My, the base plate 2 has a mass of Ma, the sliding component 3 is has a mass of Mg, the resistance-increasing component 4 has a mass of Mz, the counterforce device 5 has a mass of Mr; the friction coefficient between the shield machine 10 and the base plate 2 is Udz, the friction coefficient between the base plate 2 and the supporting frame 1 is Uz, the friction coefficient between the sliding component 3 and the ground is Ugg, the friction coefficient between the resistance-increasing component 4 and the ground is U,q, the gravitational acceleration is G, the outward thrust and the inward contraction force of the telescopic device 6 are F: and Fs, respectively, the contact portion between the ground and the sliding component 3 is subjected to a total of pressure of Fy, and the contact portion between the ground and the resistance-increasing component 4 is subjected to a total of pressure of Fz; The maximum static friction between the shield machine and the base plate F4z=Ma°GxUdz is greater than the maximum static friction between the base plate and the supporting frame Fz=(Mg+Mzp)*G*xUzz, and Ma+Mzc+Mz5+Mg+Mzz+M:=Fg+Fz, Uga<< Uz In the state where the telescopic device has a thrust of Fi: (1) Be (My +M, F, In the state where the telescopic device has a contraction force of Fs: (2) br Oy HME JF Oy 0M) GU WE tM MM) (My Mg) XG XT Fy x Uy x (My +0) on (M+ MF, Further, as shown in FIG. 1, FIG. 3 and FIG. 5, the supporting frame 1 comprises a supporting plate 11 provided on the lower side of the base plate 2 and parallel to the base plate 2 and a plurality of sets of snap plates 12 perpendicular to the supporting plate and provided at intervals, wherein each set of snap plates 12 comprises a first snap plate 121 and a second snap plate 122 which are parallel to each other, the sliding component 3 comprises rollers 31 and roller shafts 32 provided at both ends of the roller and configured to install the rollers 31, the two roller shafts 32 are rotationally connected with the first snap plate 121 and the second snap plate 122, respectively.
Baffle plates 13 integrally formed or fixedly connected with the snap plates on both sides are further provided at both sides of the supporting plate. The baffle plates 13 are provided on the upper side of the supporting plate, and the opposite base plate of the baffle plate 13 has a certain vertical height to prevent the shield machine from sliding sideways and also prevent the base plate from sliding sideways, so that the base plate can only move forward and backward.
Further, as shown in FIG. 1 and FIG. 4, the supporting plate 11 is provided with a plurality of sets of runner components 7 configured to reduce the friction between the supporting plate 11 and the base plate 2, a runner groove 20 is provided on the upper side of the supporting plate 11, the runner component 7 comprises a plurality of runners 71 and rotating shafts 72 provided at both ends of the runners 71, and the rotating shafts 72 are rotationally connected with the side surface of the runner groove 20.
Further, the resistance-increasing component 4 is a telescopic supporting device.
Further, as shown in FIGs. 6-7, the telescopic supporting device comprises a top supporting component 41 and a telescopic bottom supporting component 42 installed below the top supporting component 41 and configured to increase or decrease the maximum static friction between the resistance-increasing component 4 and the ground, when it is desired to increase the maximum static friction between the resistance-increasing component 4 and the ground, the bottom supporting component 42 extends, and when it is desired to reduce the maximum static friction between the resistance-increasing component 4 and the ground, the bottom supporting component 42 contracts.
Further, as shown in FIG. 2 to FIG. 3, the upper portion of the base plate 2 is provided with a groove 30 configured to prevent the shield machine 10 from rolling laterally, the groove is provided with a rubber pad (not shown) which increases the maximum static friction between the shield machine and the groove to prevent longitudinally relative movement of the shield machine and the base plate under the action of thrust and tension. Further, as shown in FIG. 3, the counterforce device 5 is a metal plate fixed at the tail end of the advancing device. Preferably, the metal plate is a rectangular steel plate. By fixing the steel plate vertically at the tail end of the supporting frame, one end of the hydraulic push cylinder is fixed to the steel plate to form a stress point of the hydraulic push cylinder, and the shield machine is advanced forward.
Embodiment 2 The present invention further provides a plane sliding advancing method for a shield machine, which is implemented using the advancing device as shown in FIGs.
1-7; as shown in FIG. 8, the advancing method is as follows:
when the telescopic device 6 is extended and advanced, activating the resistance-increasing component 4 to increase the resistance, so that the acceleration of the shield machine 10 relative to a base plate 2 is greater than the acceleration of a supporting frame 1 relative to the ground, when the telescopic device 6 is contracted, activating the resistance- increasing component 4 to reduce the resistance, so that the acceleration of the shield machine 10 relative to the base plate 2 is less than the acceleration of the supporting frame 1 relative to the ground.
Specifically, the shield machine 10 and the telescopic device 6 have a total of mass of Ma, the supporting frame 1 has a mass of Mz«, the base plate 2 has a mass of Ma, the sliding component 3 is has a mass of Ms, the resistance-increasing component 4 has a mass of Mz, the counterforce device 5 has a mass of Mr, the friction coefficient between the shield machine 10 and the base plate 2 is Ug, the friction coefficient between the base plate 2 and the supporting frame 1 is Uzz, the friction coefficient between the sliding component 3 and the ground is Ug4, the friction coefficient between the resistance-increasing component 4 and the ground is Ug, the gravitational acceleration is G, the outward thrust and the inward contraction force of the telescopic device 6 are F: and Fs, respectively, the contact portion between the ground and the sliding component 3 is subjected to a total of pressure of Fg, and the contact portion between the ground and the resistance-increasing component 4 is subjected to a total of pressure of Fz.
The advancing method comprises the steps of: S1: plane sliding the shield machine 10 onto the base plate 2 of the advancing device, and fixing the telescopic device 6 at one end of the shield machine 10 to the counterforce device 5; S2: activating the resistance-increasing component 4 to increase the resistance, so that the maximum static friction between the resistance-increasing component 4 and the ground is increased, and the maximum static friction resistance (Fmza) of the plane sliding advancing device for the shield machine 10 and the ground satisfies the following formula 1: FE ox Ug + F,xU g+ (My + Ma )xGxU | EM +M KGV, M, +M,+M, +M, M,+M, i S3: stopping the resistance-increasing component 4 from continuing to increase the maximum static friction value of the resistance-increasing component 4 and the ground, activating the telescopic device, applying the thrust Fy to push the shield machine 10 and the base plate 2 to move forward, completing an advancing step, and stopping advancing the telescopic device; S4: activating the resistance-increasing component 4 to reduce the resistance, so that the maximum static friction resistance between the resistance- increasing component 4 and the ground is reduced, and the maximum static friction resistance (Fmza) of the plane sliding advancing device for the shield machine 10 and the ground satisfies the following formula 2: FE xUy + F,xU,, +(M, Ma) xx] FE (M, +M)xGxU M, +M, +M, +M, M,+M, S5: stopping the resistance-increasing component 4 from reducing the resistance; activating the telescopic device 6 in which the contraction force Fs1 begins to contract, and completing a contracting step; S6: repeating step S2, step S3, step S4, and step S5 until the shield machine 10 reaches the designated position.
Further, in the step S4, the maximum static friction between the resistance- increasing component 4 and the ground is reduced to 0, so that the telescopic device 6 is activated to contract after the resistance-increasing component 4 is separate from the ground.
Further, the manner in which the resistance of the resistance-increasing component 4 is increased in the step S2 is to extend the height of the bottom resistance-increasing component 42 and increase the stress of the resistance- increasing component 4; in the step S3, stopping the resistance-increasing component 4 from continuing to increase the maximum static friction between the resistance- increasing component 4 and the ground is realized by stopping extending the height of the bottom resistance-increasing component 42; in the step S4, reducing the maximum static friction resistance between the resistance-increasing component 4 and the ground is realized by shortening the height of the bottom resistance-increasing component 42.
Further, the resistance-increasing component 4 is activated to increase the resistance in the step S2 so that the static friction between the resistance-increasing component and the ground is greater than or equal to the sum of the thrust required for acceleration when the shield machine is activated forward and the friction between the base plate on the lower side of the shield machine and the supporting frame.
Further, the resistance-increasing component 4 is activated to reduce the resistance in the step S4 so that the static friction between the resistance-increasing component and the ground is less than or equal to the sum of the thrust required for acceleration when the shield machine is activated forward and the friction between the base plate on the lower side of the shield machine and the supporting frame.
Further, the advancing method further comprises the step of placing the plane sliding advancing device for the shield machine 10 on the treated road surface.
It is obvious that the above embodiments of the present invention are merely illustrative of the technical solutions of the present invention, and are not intended to limit the specific embodiments of the present invention. Any modifications, equivalents, and improvements made within the spirit and scope of the claims of the present invention are intended to be included within the scope of protection of the claims of the present invention.
Embodiments
1. A plane sliding advancing device for a shield machine, wherein the advancing device comprises a supporting frame (1), a base plate (2) provided on an upper side of the supporting frame (1) and configured to support the shield machine (10), a plurality of sliding components (3) and a plurality of resistance-increasing components (4) provided on a lower side of the supporting frame {1}, and a counterforce device (5) provided at the tail end of the supporting frame (1), wherein the shield machine (10) is provided with a telescopic device (6) at one end, and the telescopic device (6) realizes the advancing of the shield machine (10) with the support of the counterforce device (5) the shield machine (10) and the telescopic device (6) have a total of mass of Ma, the supporting frame (1) has a mass of Myc, the base plate (2) has a mass of Ma, the sliding component (3) is has a mass of Mg, the resistance-increasing component (4) has a mass of M:z, the counterforce device (5) has a mass of My, the friction coefficient between the shield machine (10) and the base plate (2) is Ug, the friction coefficient between the base plate (2) and the supporting frame (1) is Uzz, the friction coefficient between the sliding component (3) and the ground is Ugg, the friction coefficient between the resistance-increasing component (4) and the ground is U,q, the gravitational acceleration is G, the outward thrust and the inward contraction force of the telescopic device (6) are Fy and Fs, respectively, the contact portion between the ground and the sliding component (3) is subjected to a total of pressure of Fg, and the contact portion between the ground and the resistance-increasing component (4) is subjected to a total of pressure of Fz; the maximum static friction between the shield machine (10) and the base plate (2) Fg=MaGxUgz is greater than the maximum static friction between the base plate (2) and the supporting frame (1) Fzz=(Ma+Mz5)°GxUzz, and Ma+Mzc+Mzp+Mg+Mzz+M=Fg+F 2, Uga< Uza; in the state where the telescopic device (6) has a thrust of Ft: sd (M, + MF, inthe state where the telescopic device (6) has a contraction force of Fs: po WME Ey +A GU IQ, MM 0M Je Oy +3 FXG AU, Fx Uy x (0, +My) . (M, + MF,
2. The advancing device according to the preceding embodiment, wherein the supporting frame (1) comprises a supporting plate (11) provided on the lower side of the base plate (2) and parallel to the base plate (2) and a plurality of sets of snap plates (12) perpendicular to the supporting plate and provided at intervals, wherein each set of snap plates (12) comprises a first snap plate (121) and a second snap plate (122) which are parallel to each other, the sliding component {3) comprises rollers (31) and roller shafts (32) provided at both ends of the roller and configured to install the rollers (31), the two roller shafts (32) are rotationally connected with the first snap plate (121) and the second snap plate ( 122), respectively.
3. The advancing device according to any of the preceding embodiments 1-2, wherein the supporting plate (11) is provided with a plurality of sets of runner components (7) configured to reduce the friction between the supporting plate (11) and the base plate (2), a runner groove (20) is provided on the upper side of the supporting plate (11), the runner component (7) comprises a plurality of runners (71) and rotating shafts (72) provided at both ends of the runners (71), and the rotating shafts (72) are rotationally connected with the side surface of the runner groove (20).
4. The advancing device according to any of the preceding embodiments 1-4, wherein the resistance-increasing component (4) is a jack.
5. The advancing device according to any of the preceding embodiments 1-3, wherein the resistance-increasing component (4) is a telescopic supporting device.
6. The advancing device according to embodiment 5, wherein the resistance- increasing component (4) is a telescopic supporting device; the telescopic supporting device comprises a top supporting component (41) and a telescopic bottom supporting component (42) installed below the top supporting component ( 41) and configured to increase or decrease the maximum static friction between the resistance-increasing component (4) and the ground, when it is desired to increase the maximum static friction between the resistance-increasing component (4) and the ground, the bottom supporting component (42) extends, and when it is desired to reduce the maximum static friction between the resistance-increasing component (4) and the ground, the bottom supporting component (42) contracts.
7. The advancing device according to embodiment 1, wherein the upper portion of the base plate (2) is provided with a groove (30) configured to prevent the shield machine (10) from rolling laterally, and the groove is provided with a rubber pad which increases the maximum static friction between the shield machine and the groove to prevent longitudinally relative movement of the shield machine and the base plate under the action of thrust and tension.
8. The advancing device according to any of the preceding embodiments, wherein the counterforce device (5) is a metal plate fixed at the tail end of the advancing device.
9. The advancing device according to embodiment 8, wherein the metal plate is a rectangular steel plate.
10. The advancing device according to any of the preceding embodiments, wherein the telescopic device (6) is a hydraulic push cylinder, and the hydraulic push cylinder provides a thrust and a tension for the shield machine to continuously advance the shield machine.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL2023905A NL2023905B1 (en) | 2019-09-25 | 2019-09-25 | Plane sliding advancing device for shield machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL2023905A NL2023905B1 (en) | 2019-09-25 | 2019-09-25 | Plane sliding advancing device for shield machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| NL2023905A NL2023905A (en) | 2019-11-26 |
| NL2023905B1 true NL2023905B1 (en) | 2020-09-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL2023905A NL2023905B1 (en) | 2019-09-25 | 2019-09-25 | Plane sliding advancing device for shield machine |
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| Country | Link |
|---|---|
| NL (1) | NL2023905B1 (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101550829B (en) * | 2009-05-14 | 2011-03-16 | 中铁三局集团有限公司 | Shield whole self-propelled station-crossing construction method |
| CN102337900A (en) | 2011-09-16 | 2012-02-01 | 中铁三局集团有限公司 | Circulating matting type shield air-pushing method |
| CN106089223B (en) * | 2016-06-24 | 2019-04-19 | 中铁隧道集团二处有限公司 | A kind of TBM Quick air pushes away method |
| CN109441458B (en) * | 2018-10-25 | 2021-09-14 | 中建八局轨道交通建设有限公司 | Air-pushing station-crossing device of whole shield machine |
| CN110159279B (en) * | 2019-06-10 | 2021-02-19 | 上海弥涅科技有限公司 | Shield constructs quick-witted advancing device |
-
2019
- 2019-09-25 NL NL2023905A patent/NL2023905B1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| NL2023905A (en) | 2019-11-26 |
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| MM | Lapsed because of non-payment of the annual fee |
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