Device and method for resetting and reassembling shield cutter head in tunnel

Abstract

The invention discloses a device and method for resetting and reinstalling a shield cutter head in a tunnel, and belongs to the field of shield construction mechanical equipment. The device comprises a plurality of temporary fixing supports used for temporarily fixing the cutter head; the multiple supporting platforms are arranged in the circumferential direction of the cutterhead at intervals, one end of each supporting platform penetrates through a gap of the cutterhead and abuts against the cutterhead supporting position, and the other end of each supporting platform is fixedly connected to a shield tunneling machine front shield soil bin partition plate to form a supporting system. The multiple reset mechanisms and the multiple supporting platforms are arranged correspondingly, the fixed ends of the reset mechanisms are fixed to the corresponding supporting platforms correspondingly, and the movable ends of the reset mechanisms are fixed to the cutterhead so that reset of the cutterhead can be achieved. According to the device, the translation oil cylinder and the jacking oil cylinder are installed, the resetting and reassembling efficiency and accuracy of the shield cutter head are improved, in the whole cutter head resetting and reassembling process, the operation efficiency is improved, the labor operation intensity is reduced, safety is ensured, and the application effect is good.

Description

Technical Field

[0001] The present invention belongs to the field of shield construction equipment, and in particular relates to a device and method for resetting and reinstalling a shield cutter head in a tunnel. Background Art

[0002] At present, the method for resetting the cutterhead in a tunnel is generally to reinforce the ground and open a vertical shaft, and use a large crane to reinstall the cutterhead. This method is relatively expensive and is generally subject to significant restrictions on ground traffic. Therefore, there is an urgent need for a device and method for resetting and reinstalling the shield cutterhead in a tunnel, so as to achieve safe and stable resetting and reinstallation of the shield cutterhead in the tunnel. Summary of the Invention

[0003] In order to achieve the above object, the present invention adopts the following technical solutions:

[0004] A device for resetting and reinstalling a shield cutterhead in a tunnel, comprising:

[0005] A plurality of temporary fixed supports, each having a first end fixedly connected to the upper portion of the cutterhead and a second end fixedly connected to the front shield soil bin partition of the shield machine, for temporarily fixing the cutterhead;

[0006] Multiple support platforms are arranged at intervals along the circumference of the cutterhead, one end of each support platform passes through the gap of the cutterhead and abuts against the cutterhead support position, and the other end is fixedly connected to the shield soil bin partition of the shield machine to form a support system;

[0007] Multiple reset mechanisms are provided in one-to-one correspondence with multiple support platforms, and the fixed ends of the reset mechanisms are respectively fixed on the corresponding support platforms, and the movable ends are fixed on the cutter disc, for realizing the reset of the cutter disc.

[0008] Furthermore, the temporary fixed support is an H-shaped steel.

[0009] Furthermore, the reset mechanism includes:

[0010] Multiple translation cylinders are provided corresponding to the support platforms, and the multiple translation cylinders are all provided between the cutterhead and the shield soil bin partition of the shield machine, and the fixed ends of the translation cylinders are respectively fixed to the corresponding support platforms through ear seats, and the movable ends are respectively fixedly connected to the cutterhead through ear seats;

[0011] Multiple jacking cylinders are arranged in a one-to-one correspondence with the multiple supporting platforms. Multiple jacking cylinders are all arranged on the front of the cutter disc. Multiple counter-stands are arranged on the front of the cutter disc. Multiple counter-stands are arranged corresponding to multiple jacking cylinders. The fixed ends of the multiple jacking cylinders are respectively fixedly connected to the corresponding supporting platforms, and the movable ends are respectively fixedly connected to the corresponding counter-stands.

[0012] Furthermore, it also includes an adjustable support, which is arranged in the middle position of the lower part of the cutter disc with an adjustable height, and is used to adjust the gap between the support platform and the cutter disc.

[0013] Furthermore, the support platform includes a first support platform, a second support platform, a third support platform and a fourth support platform, wherein the first support platform and the second support platform are respectively located on both sides of the upper part of the cutter disc, and the third support platform and the fourth support platform are respectively located on both sides of the lower part of the cutter disc.

[0014] Furthermore, the first support platform and the second support platform have the same structure, and the first support platform includes:

[0015] a first box-shaped crossbeam, one end of which passes through the gap of the cutterhead and abuts against the cutterhead support position, and the other end of which is fixedly connected to the shield soil bin partition of the shield machine;

[0016] An oblique support, wherein the first end of the oblique support is fixedly connected to the first box-shaped crossbeam, and the second end is fixed to the shield soil bin partition of the shield machine.

[0017] Furthermore, the third support platform has the same structure as the fourth support platform, and the third support platform includes:

[0018] a second box-shaped crossbeam, one end of which passes through the gap of the cutterhead and abuts against the cutterhead support position, and the other end of which is fixedly connected to the shield soil bin partition of the shield machine;

[0019] A first box-type support, wherein a first end of the first box-type support is fixedly connected to the second box-type cross beam, and a second end is fixed to the ground.

[0020] Furthermore, the adjustable support includes:

[0021] a third box-shaped crossbeam, wherein a first end of the third box-shaped crossbeam is fixedly connected to the front shield soil bin partition of the shield machine, and a second end of the third box-shaped crossbeam extends to the lower side of the cutterhead bearing of the cutterhead;

[0022] a fourth box-shaped crossbeam, the fourth box-shaped crossbeam being arranged at the upper end of the third box-shaped crossbeam, and the upper end surface of the fourth box-shaped crossbeam abutting against the cutter head bearing;

[0023] A second box-type support, wherein a first end of the second box-type support is fixedly connected to the third box-type crossbeam, and a second end is fixed on the ground.

[0024] A method for resetting and reinstalling a shield cutterhead in a tunnel, using any of the above-mentioned devices for resetting and reinstalling a shield cutterhead in a tunnel, the method comprising the following steps:

[0025] S10. Fix the inclined cutterhead to the shield chamber partition in front of the shield machine using a temporary fixed support;

[0026] The upper part of the cutterhead is temporarily fixed with multiple H-shaped steel bars;

[0027] S20, constructing the cutter head support platform and reset mechanism;

[0028] According to the tunnel clearance and actual space and location parameters on site, multiple support platforms are installed. Each support platform has been subjected to stress analysis and calculation to meet the load requirements.

[0029] S30, cutter head movement and leveling;

[0030] S31. After the soil excavation is completed and the hand chain hoist is installed on the upper part, the multiple temporary fixed supports of the cutterhead are removed after the installation is completed;

[0031] S32. Install translation cylinders on each support platform. Two welded lugs are used to fix the translation cylinders. One lug is welded to the corresponding support platform's cross brace, and the other is welded to the cutterhead. The cutterhead moves horizontally by moving the translation cylinders horizontally. Use a hydraulic pump station to control the forward movement of the horizontal cylinders to adjust the cutterhead to a vertical position. During the cutterhead leveling process, use adjustable supports to reserve adjustable gaps between the support positions of multiple support platforms and the cutterhead to ensure smooth movement.

[0032] S40, cutterhead lifting;

[0033] Multiple counter-stands are welded on the front of the cutterhead, and multiple lifting cylinders are installed between the corresponding support platforms and the counter-stands. The cutterhead is lifted by the lifting cylinders.

[0034] S50: Reset and reinstall the cutter head.

[0035] Beneficial effects of the present invention:

[0036] The present invention installs a translation cylinder and a jacking cylinder to improve the efficiency and accuracy of resetting and reinstalling the shield cutter head. During the entire process of resetting and reinstalling the cutter head, the operating efficiency is improved, the labor intensity is reduced, and safety is ensured, with good application effect.

[0037] The present invention designs and manufactures a support platform, the main material of which is a 40mm thick Q345B steel plate, which is spliced ​​to form a steel box beam structure. The device has the advantages of occupying a small space, having a strong bearing capacity, and being able to safely lift, move, and install larger structural parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a schematic diagram of a front view of a temporary support position of a device for resetting and reinstalling a shield cutter head in a tunnel according to the present invention;

[0039] Figure 2 This is a schematic side view of a temporary support position of a device for resetting and reinstalling a shield cutter head in a tunnel according to the present invention;

[0040] Figure 3 This is a schematic diagram of a support platform and an adjustable support front view of a device for resetting and reinstalling a shield cutterhead in a tunnel according to the present invention;

[0041] Figure 4 This is a schematic side view of a support platform and adjustable support for a device for resetting and reinstalling a shield cutterhead in a tunnel according to the present invention;

[0042] Figure 5 This is a schematic diagram of a front view of a reset mechanism of a device for resetting and reinstalling a shield cutterhead in a tunnel according to the present invention;

[0043] Figure 6 This is a schematic side view of a reset mechanism for a device for resetting and reinstalling a shield cutterhead in a tunnel according to the present invention;

[0044] Figure 7 This is a schematic diagram of the cutter head after adjustment of the present invention.

[0045] In the figure: 1. Cutterhead; 2. Temporary fixed support; 3. First support platform; 4. Second support platform; 5. Third support platform; 6. Fourth support platform; 7. Adjustable support; 8. Translation cylinder; 9. Lifting cylinder; 10. Shield machine front shield soil bin partition; 11. Counterstand. DETAILED DESCRIPTION

[0046] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0047] Example 1

[0048] refer to Figures 1 to 7 , a device for resetting and reinstalling a shield cutter head in a tunnel, comprising:

[0049] Multiple temporary fixed supports 2, each having a first end fixedly connected to the upper portion of the cutterhead 1 and a second end fixedly connected to the shield soil bin partition 10 in front of the shield machine, for temporarily fixing the cutterhead 1;

[0050] Multiple support platforms are arranged at intervals along the circumference of the cutterhead 1. One end of the support platform passes through the gap of the cutterhead 1 and abuts against the support position of the cutterhead 1. The other end is fixedly connected to the shield soil bin partition 10 in front of the shield machine to form a support system.

[0051] Multiple reset mechanisms are provided corresponding to the multiple support platforms, and the fixed ends of the reset mechanisms are respectively fixed on the corresponding support platforms, and the movable ends are all fixed on the cutter disc 1, for realizing the reset of the cutter disc 1.

[0052] The present invention installs a reset mechanism, improves the efficiency and accuracy of resetting and reinstalling the shield cutter head, improves the working efficiency, reduces the labor working intensity, ensures safety, and has a good application effect.

[0053] Example 2

[0054] In order to improve practicality, this embodiment makes further arrangements based on the embodiment 1.

[0055] In this embodiment, the temporary fixing support 2 is an H-shaped steel.

[0056] Preferably, there are four temporary fixed supports 2, which are 200*200*8*12H-shaped steel.

[0057] In this embodiment, the reset mechanism includes:

[0058] Multiple translation cylinders are provided corresponding to the support platforms. The multiple translation cylinders are all provided between the cutterhead 1 and the shield machine front shield soil bin partition 10, and the fixed ends of the translation cylinders are respectively fixed to the corresponding support platforms through ear seats, and the movable ends are respectively fixedly connected to the cutterhead 1 through ear seats;

[0059] Multiple lifting cylinders are provided corresponding to the supporting platforms, and the multiple lifting cylinders are all provided on the front of the cutter disc 1. The front of the cutter disc 1 is provided with multiple counter-stands 11, and the multiple counter-stands 11 are provided corresponding to the multiple lifting cylinders. The fixed ends of the multiple lifting cylinders are respectively fixedly connected to the corresponding supporting platforms, and the movable ends are respectively fixedly connected to the corresponding counter-stands 11.

[0060] In this embodiment, the support platform includes a first support platform 3, a second support platform 4, a third support platform 5 and a fourth support platform 6, wherein the first support platform 3 and the second support platform 4 are respectively located on both sides of the upper part of the cutter disc 1, and the third support platform 5 and the fourth support platform 6 are respectively located on both sides of the lower part of the cutter disc 1.

[0061] In this embodiment, the first support platform 3 and the second support platform 4 have the same structure. The first support platform 3 includes:

[0062] A first box-shaped crossbeam, one end of which passes through the gap of the cutterhead 1 and abuts against the support position of the cutterhead 1, and the other end is fixedly connected to the shield soil bin partition 10 in front of the shield machine;

[0063] The first end of the oblique support is fixedly connected to the first box-shaped crossbeam, and the second end is fixed to the shield soil bin partition 10 in front of the shield machine.

[0064] In this embodiment, the third support platform 5 has the same structure as the fourth support platform 6. The third support platform 5 includes:

[0065] A second box-shaped crossbeam, one end of which passes through the gap of the cutterhead 1 and abuts against the support position of the cutterhead 1, and the other end is fixedly connected to the shield soil bin partition 10 in front of the shield machine;

[0066] The first box-type support has a first end fixedly connected to the second box-type crossbeam, and a second end fixed to the ground.

[0067] Example 3

[0068] In order to ensure smooth movement of the cutter head during leveling, this embodiment makes further arrangements based on embodiment 1 or embodiment 2.

[0069] In this embodiment, an adjustable support 7 is further included. The adjustable support 7 is arranged at the lower middle position of the cutter disc 1 with an adjustable height, and is used to adjust the gap between the support platform and the cutter disc 1.

[0070] In this embodiment, the adjustable support 7 includes:

[0071] a third box-shaped crossbeam, wherein a first end of the third box-shaped crossbeam is fixedly connected to the shield soil bin partition 10 of the shield machine, and a second end thereof extends to the lower side of the cutterhead 1 bearing of the cutterhead 1;

[0072] A fourth box-shaped crossbeam is provided at the upper end of the third box-shaped crossbeam, and an upper end surface of the fourth box-shaped crossbeam abuts against the bearing of the cutter head 1;

[0073] The second box-shaped support has a first end fixedly connected to the third box-shaped crossbeam, and a second end fixed to the ground.

[0074] During the specific implementation, 5 groups of supports are designed and manufactured, namely the first support platform 3, the second support platform 4, the third support platform 5, the fourth support platform 6 and the adjustable support 7. The main material is 40mm thick Q345B steel plate and welded together to form a steel box girder structure, which has the characteristics of high strength, good toughness, convenient construction, and strong bearing capacity. The steel box girder structure is formed by splicing the steel plates. The device has the advantages of small space occupation, strong bearing capacity, and the ability to safely lift, move, and install larger structural parts.

[0075] Preferably, the first box beam, the second box beam, the third box beam and the fourth box beam are box beams of 400*400*35*3, and the oblique support, the first box support and the second box support are box supports of 300*300*16*16.

[0076] During implementation, the load on each platform was calculated as 80 tons. After force analysis and calculation, the load requirements were met. Because the beams and supports used were too large to be transported into the earth bunker as a whole, they were unloaded from the ground in sections and transported from the man bunker to the earth bunker, where they were assembled and welded.

[0077] In specific implementation, the steel plates are connected by welding, and after passing UT and PT100% flaw detection, they meet the requirements of on-site use.

[0078] Example 4

[0079] This embodiment provides a method for resetting and reinstalling a shield cutterhead in a tunnel, using a device for resetting and reinstalling a shield cutterhead in a tunnel as described in Example 2 or Example 3. The method includes the following steps:

[0080] S10, fixing the inclined cutterhead 1 on the shield machine front shield soil bin partition 10 using a temporary fixed support 2;

[0081] The upper part of the cutterhead 1 is temporarily fixed with multiple H-shaped steels;

[0082] S20, constructing the support platform and reset mechanism of the cutter head 1;

[0083] According to the tunnel clearance and actual space and location parameters on site, multiple support platforms are installed. Each support platform has been subjected to stress analysis and calculation to meet the load requirements.

[0084] S30, cutter head 1 moves and is leveled;

[0085] S31, soil excavation is completed and a hand chain hoist is installed on the upper part. After installation, multiple temporary fixed supports 2 of the cutter head 1 are removed;

[0086] During the specific implementation, four 10-ton hand hoists are installed. The cross brace supporting the cutter disc is hard-connected to the cutter disc, so the upper fixed steel can be directly cut off, and the four 10T hoists on the upper part can be used for assistance.

[0087] S32. A translation cylinder 8 is installed on each supporting platform. Two welded ear seats are used to fix the translation cylinder 8. One ear seat is welded to the corresponding cross-bracing platform of the supporting platform, and the other is welded to the cutterhead 1. The horizontal movement of the translation cylinder 8 is used to achieve the horizontal movement of the cutterhead 1. The hydraulic pump station is used to control the forward movement of the horizontal movement cylinder to adjust the cutterhead 1 to a vertical position. During the leveling process of the cutterhead 1, the adjustable support 7 is used to reserve adjustable gaps between the supporting positions of the multiple supporting platforms and the cutterhead 1 to ensure smooth movement.

[0088] In specific implementation, four support platforms are respectively installed with translation cylinders, using four cylinders with a push and pull force of 50T and a stroke of 600mm. The hydraulic pump station is used to control the horizontal movement cylinder 4 to move forward and adjust the cutter head to vertical;

[0089] S40, cutterhead 1 jacking up;

[0090] A plurality of inverted seats 11 are welded on the front of the cutter head 1, and a plurality of jacking cylinders 9 (50T) are installed between the corresponding support platform and the inverted seats 11. The cutter head 1 is lifted by the jacking cylinders 9;

[0091] S50: Reset and reinstall the cutter head.

[0092] Example 5

[0093] This embodiment takes the Nanjing shield project as an example. During the entire process of resetting and reinstalling the cutterhead, the operation efficiency is improved, the labor intensity is reduced, and safety is ensured, with good application effects.

[0094] Economic Benefits: The existing technical method requires 20 workers at a salary of 300 yuan per day, a construction period of 60 days, and labor costs of 20*300*60 = 360,000 yuan, with shaft reinforcement and hoisting costs approaching 10 million yuan. Using this device, the system requires 15 workers at a salary of 300 yuan per day, a construction period of 45 days, and labor costs of 15*300*45 = 202,500 yuan. This device saves 157,500 yuan in labor costs per unit. To date, one shield screw machine has been disassembled and installed in a tunnel, generating a cumulative direct economic benefit of 157,500 yuan and saving nearly 10 million yuan in shaft reinforcement and hoisting costs. Based on the above analysis, if this technology is widely adopted in the shield tunneling industry, assuming that China Railway Group has 1,000 conventional-diameter shield machines, and 2% of these machines require screw disassembly in tunnels each year, it could generate a total economic benefit of 3.15 million yuan per year.

[0095] Social benefits: The application of this device has shortened the operation time for resetting and reinstalling the shield cutterhead in the tunnel. During the entire implementation process, reasonable matching and coordination of work have achieved safe and stable resetting and reinstallation of the shield cutterhead in the tunnel, which has been unanimously praised by the Nanjing Metro owners.

[0096] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A device for resetting and reinstalling a shield cutterhead in a tunnel, characterized in that: include: A plurality of temporary fixed supports, each having a first end fixedly connected to the upper portion of the cutterhead and a second end fixedly connected to the front shield soil bin partition of the shield machine, for temporarily fixing the cutterhead; Multiple support platforms are arranged at intervals along the circumference of the cutterhead, one end of each support platform passes through the gap of the cutterhead and abuts against the cutterhead support position, and the other end is fixedly connected to the shield soil bin partition of the shield machine to form a support system; Multiple reset mechanisms are provided in one-to-one correspondence with multiple support platforms, and the fixed ends of the reset mechanisms are respectively fixed on the corresponding support platforms, and the movable ends are fixed on the cutter disc, for realizing the reset of the cutter disc.

2. The device for resetting and reinstalling the shield cutter head in a tunnel according to claim 1, characterized in that: The temporary fixed support is H-shaped steel.

3. The device for resetting and reinstalling the shield cutter head in a tunnel according to claim 1, characterized in that: The reset mechanism comprises: Multiple translation cylinders are provided corresponding to the support platforms, and the multiple translation cylinders are all provided between the cutterhead and the shield soil bin partition of the shield machine, and the fixed ends of the translation cylinders are respectively fixed to the corresponding support platforms through ear seats, and the movable ends are respectively fixedly connected to the cutterhead through ear seats; Multiple jacking cylinders are arranged in a one-to-one correspondence with the multiple supporting platforms. Multiple jacking cylinders are all arranged on the front of the cutter disc. Multiple counter-stands are arranged on the front of the cutter disc. Multiple counter-stands are arranged corresponding to multiple jacking cylinders. The fixed ends of the multiple jacking cylinders are respectively fixedly connected to the corresponding supporting platforms, and the movable ends are respectively fixedly connected to the corresponding counter-stands.

4. The device for resetting and reinstalling a shield cutterhead in a tunnel according to claim 1, characterized in that: It also includes an adjustable support, which is height-adjustable and is arranged at the lower middle position of the cutter disc to adjust the gap between the support platform and the cutter disc.

5. The device for resetting and reinstalling the shield cutter head in a tunnel according to claim 1, characterized in that: The support platform includes a first support platform, a second support platform, a third support platform and a fourth support platform, wherein the first support platform and the second support platform are respectively located on both sides of the upper part of the cutter disc, and the third support platform and the fourth support platform are respectively located on both sides of the lower part of the cutter disc.

6. The device for resetting and reinstalling the shield cutter head in a tunnel according to claim 5, characterized in that: The first support platform has the same structure as the second support platform, and the first support platform includes: a first box-shaped crossbeam, one end of which passes through the gap of the cutterhead and abuts against the cutterhead support position, and the other end of which is fixedly connected to the shield soil bin partition of the shield machine; An oblique support, wherein the first end of the oblique support is fixedly connected to the first box-shaped crossbeam, and the second end is fixed to the shield soil bin partition of the shield machine.

7. The device for resetting and reinstalling the shield cutter head in a tunnel according to claim 5, characterized in that: The third support platform has the same structure as the fourth support platform, and the third support platform includes: a second box-shaped crossbeam, one end of which passes through the gap of the cutterhead and abuts against the cutterhead support position, and the other end of which is fixedly connected to the shield soil bin partition of the shield machine; A first box-type support, wherein a first end of the first box-type support is fixedly connected to the second box-type cross beam, and a second end is fixed to the ground.

8. The device for resetting and reinstalling a shield cutterhead in a tunnel according to claim 4, characterized in that: The adjustable support comprises: a third box-shaped crossbeam, wherein a first end of the third box-shaped crossbeam is fixedly connected to the front shield soil bin partition of the shield machine, and a second end of the third box-shaped crossbeam extends to the lower side of the cutterhead bearing of the cutterhead; a fourth box-shaped crossbeam, the fourth box-shaped crossbeam being arranged at the upper end of the third box-shaped crossbeam, and the upper end surface of the fourth box-shaped crossbeam abutting against the cutter head bearing; A second box-type support, wherein a first end of the second box-type support is fixedly connected to the third box-type crossbeam, and a second end is fixed on the ground.

9. A method for resetting and reinstalling a shield cutterhead in a tunnel, characterized in that: The device for resetting and reinstalling a shield cutter head in a tunnel according to any one of claims 1 to 8 is used, and the method comprises the following steps: S10. Fix the inclined cutterhead to the shield chamber partition in front of the shield machine using a temporary fixed support; The upper part of the cutterhead is temporarily fixed with multiple H-shaped steel bars; S20, construction of the cutter head support platform and reset platform; According to the tunnel clearance and actual space and location parameters on site, multiple support platforms are installed. Each support platform has been subjected to stress analysis and calculation to meet the load requirements. S30, cutter head movement and leveling; S31. After the soil excavation is completed and the hand chain hoist is installed on the upper part, the multiple temporary fixed supports of the cutterhead are removed after the installation is completed; S32. Install translation cylinders on each support platform. Two welded lugs are used to fix the translation cylinders. One lug is welded to the corresponding support platform's cross brace, and the other is welded to the cutterhead. The cutterhead moves horizontally by moving the translation cylinders horizontally. Use a hydraulic pump station to control the forward movement of the horizontal cylinders to adjust the cutterhead to a vertical position. During the cutterhead leveling process, use adjustable supports to reserve adjustable gaps between the support positions of multiple support platforms and the cutterhead to ensure smooth movement. S40, cutterhead lifting; Multiple counter-stands are welded on the front of the cutterhead, and multiple lifting cylinders are installed between the corresponding support platforms and the counter-stands. The cutterhead is lifted by the lifting cylinders. S50: Reset and reinstall the cutter head.

Images