Jacking device of shield tunneling machine and using method of jacking device

Abstract

The invention belongs to the technical field of shield tunneling machines, and particularly relates to a jacking device of a shield tunneling machine and a using method thereof.The jacking device of the shield tunneling machine comprises a bottom plate, a first square top pier is arranged on the bottom plate, a jack oil cylinder is arranged on the first square top pier, a shield body is arranged above the bottom plate, and a first triangular top pier is arranged on the side wall of the shield body; a jack oil cylinder is arranged on the bottom plate, an oil way is connected to the side wall of the jack oil cylinder in a penetrating mode, a high-pressure ball valve is arranged on the oil way, a second square top pier is arranged on the bottom plate and arranged on one side of the bottom plate, and a second triangular top pier is arranged on the side wall of the shield body. The high-pressure ball valve is mounted on the oil way of the jack oil cylinder, so that the jack oil cylinder can be freely combined, linked and independently controlled. By means of the design, accuracy and flexibility in the jacking process are greatly improved, the working state of each oil cylinder can be flexibly adjusted according to actual working conditions and needs, and the risk of shield body rollover caused by stroke deviation of the jack is effectively avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of shield machines, and in particular relates to a jacking device of a shield machine and a use method thereof. Background Art

[0002] As a key equipment in modern tunnel construction, the shield machine supports the excavation surface through its internal shield shell (i.e. shield body) and performs excavation, lining and other operations simultaneously, greatly improving the efficiency and safety of tunnel construction.

[0003] However, during the jacking operation of the shield machine, a significant technical difficulty is that the shield is prone to rollover. This is mainly due to the lack of synchronization and accuracy of the jacking device in controlling the jacking points, which causes the shield to be subjected to unbalanced lateral forces while rising vertically, thereby causing the risk of rollover. Rollover will not only cause construction interruption and increase repair costs, but may also pose serious safety hazards to construction personnel and equipment. Summary of the invention

[0004] In order to solve the above-mentioned problem, the present invention proposes a jacking device of a shield machine and a use method thereof.

[0005] The technical solution adopted by the present invention is as follows: The present invention provides a jacking device for a shield machine, including a base plate, a square top pier is provided on the base plate, a jack cylinder is provided on the square top pier, a shield body is provided above the base plate, and a triangular top pier is provided on the side wall of the shield body.

[0006] Furthermore, an oil circuit is connected through the side wall of the jack cylinder, and a high-pressure ball valve is provided on the oil circuit.

[0007] Furthermore, a second square top pier is provided on the bottom plate, the second square top pier is provided on one side of the bottom plate, and a second triangular top pier is provided on the side wall of the shield body.

[0008] The present invention also discloses a method for using a jacking device of a shield machine, which mainly comprises the following steps:

[0009] Step 1: Use the jack cylinder to support the triangular top pier 1 to drive the shield body to move upward, and install a high-pressure ball valve on the oil line of the jack cylinder to ensure that the jack cylinder can be linked and controlled individually in any combination, and the stroke of the jack cylinder can be accurately controlled to prevent the shield body from tipping over due to a large deviation in the jack stroke;

[0010] Step 2: During the jacking process, as the jacking height increases, a steel plate is inserted between the square top pier 2 and the triangular top pier 2 to ensure that there is no gap or a very small gap between the square top pier 2 and the triangular top pier 2 during the jacking process, so that if the jacking cylinder retracts due to external pressure loss, the weight of the shield can fall on the square top pier 2 close to the jack cylinder to ensure that the shield does not tip over;

[0011] Step 3: Follow up the measurement work in time. When the vertical deviation of the main engine reaches the preset value, stop the lifting operation and fill the space between the triangular top pier 2 and the square top pier 2 with steel plates to allow them to bear part of the force. In the subsequent bracket transformation and reinforcement project, the force on the square top pier 2 will gradually increase, and the force on the jack cylinder will gradually decrease. After reaching a balance point, the forces on multiple square top piers 2 will tend to be stable.

[0012] Step 4: After the bracket modification, reinforcement, heightening and new track installation are completed, use the jack cylinder to lift the main machine slightly upwards, remove the steel plate stuffed between the triangular top pier 2 and the square top pier 2, and then slowly retract the output end of the jack cylinder to let the main machine fall on the newly installed track.

[0013] The beneficial effects achieved by the present invention using the above structure are as follows:

[0014] (1) By installing a high-pressure ball valve on the oil circuit of the jack cylinder, any combination of linkage and individual control of the jack cylinder is achieved. This design greatly improves the accuracy and flexibility of the jacking process. The working state of each cylinder can be flexibly adjusted according to actual working conditions and needs, effectively avoiding the risk of shield rollover caused by jack stroke deviation.

[0015] (2) During the jacking process, as the jacking height increases, a steel plate is inserted between the square pier 2 and the triangular pier 2 to ensure close contact or only a small gap between the two. This design effectively prevents the risk of the shield body tipping over due to loss of support when the jack cylinder accidentally retracts due to external factors, greatly improving the safety of the jacking operation.

[0016] (3) In the subsequent bracket reconstruction and reinforcement project, the force on the square top pier II is gradually increased and the force on the jack cylinder is correspondingly reduced, so that the force on multiple square top piers II eventually becomes stable. This design not only reduces the load pressure on the jack cylinder, but also enhances the stability of the entire jacking structure, providing a solid support foundation for the subsequent reconstruction and reinforcement work.

[0017] (4) By precisely controlling the stroke of the jack cylinder and adding steel plates at the right time, as well as subsequent fine-tuning and unloading, the shield was smoothly and safely transferred to the newly installed track. This process not only improved construction efficiency, but also reduced potential risks caused by improper operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the present invention, the accompanying drawings required for use in the description will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0019] Figure 1 This is a front view of a jacking device of a shield machine of the present invention;

[0020] Figure 2 The present invention is a right side view of a jacking device of a shield machine.

[0021] Among them, 1. triangular top pier one, 2. triangular top pier two, 3. jack cylinder, 4. oil circuit, 5. high-pressure ball valve, 6. square top pier one, 7. square top pier two, 8. bottom plate, 9. shield body. DETAILED DESCRIPTION

[0022] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical scheme of the present invention will be clearly and completely described below in conjunction with the drawings in this specific embodiment. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0023] like Figure 1-2 As shown, the present invention proposes a jacking device for a shield machine, including a bottom plate 8, a square top pier 2 7 is provided on the bottom plate 8, the square top pier 2 7 is arranged on one side of the bottom plate 8, a triangular top pier 2 is provided on the side wall of a shield body 9, a square top pier 1 6 is provided on the bottom plate 8, a jack cylinder 3 is provided on the square top pier 1 6, an oil circuit 4 is connected through the side wall of the jack cylinder 3, a high-pressure ball valve 5 is provided on the oil circuit 4, a shield body 9 is provided above the bottom plate 8, and a triangular top pier 1 is provided on the side wall of the shield body 9.

[0024] When in use, the jack cylinder 3 is used to support the triangular top pier 1, thereby driving the shield body 9 to move upward. A high-pressure ball valve 5 is installed on the oil circuit 4 of the jack cylinder 3 to ensure that the jack cylinder 3 can be linked and controlled individually in any combination, and the stroke of the jack cylinder 3 can be accurately controlled to prevent the shield body 9 from tipping over due to a large deviation in the jack stroke. During the jacking process, as the jacking height increases, a steel plate is inserted between the square top pier 2 7 and the triangular top pier 2 2 to keep the square top pier 2 7 and the triangular top pier 2 without a gap or with a very small gap during the jacking process, so that if the jacking cylinder retracts due to external pressure loss, the weight of the shield body 9 can fall on the square top pier 2 7 close to the jack cylinder 3, ensuring that the shield body 9 Do not roll over, follow up the measurement work in time, stop the lifting operation when the deviation of the main machine in the vertical direction reaches the predetermined value, fill the steel plate between the triangular top pier 2 and the square top pier 7, let it bear part of the force, in the subsequent bracket transformation and reinforcement project, the force of the square top pier 2 7 will gradually increase, and the force of the jack cylinder 3 will gradually decrease. After reaching a balance point, the force of multiple square top piers 2 7 will tend to be stable. After the bracket transformation, reinforcement, heightening and new track installation work are completed, use the jack cylinder 3 to lift the main machine slightly upward, remove the steel plate filled between the triangular top pier 2 and the square top pier 2 7, and then slowly retract the output end of the jack cylinder 3 to let the main machine fall on the newly installed track. The above is the overall workflow of the present invention, and you can repeat this step next time you use it.

[0025] It can be seen from the above embodiments that the beneficial effects of the present invention are:

[0026] By installing a high-pressure ball valve on the oil circuit of the jack cylinder, any combination of linkage and individual control of the jack cylinder is achieved. This design greatly improves the accuracy and flexibility of the jacking process. It can flexibly adjust the working state of each cylinder according to the actual working conditions and needs, and effectively avoid the risk of the shield body rolling over due to the jack stroke deviation; during the jacking process, as the jacking height increases, a steel plate is inserted between the square top pier 2 and the triangular top pier 2 to ensure close contact or only a small gap between the two. This design effectively prevents the risk of the shield body rolling over due to loss of support when the jack cylinder accidentally retracts due to external factors, greatly improving the safety of the jacking operation; in the subsequent bracket modification and During the reinforcement project, by gradually increasing the force on the square top pier two and reducing the force on the jack cylinder accordingly, the force on multiple square top piers two eventually becomes stable. This design not only reduces the load pressure on the jack cylinder, but also enhances the stability of the entire jacking structure, providing a solid support foundation for subsequent reconstruction and reinforcement work; by precisely controlling the stroke of the jack cylinder and adding steel plates at the right time, as well as subsequent fine-tuning and unloading, the shield body is smoothly and safely transferred to the newly installed track. This process not only improves construction efficiency, but also reduces potential risks caused by improper operation.

[0027] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A jacking device for a shield machine, characterized in that: It comprises a bottom plate (8), characterized in that: a square top pier (6) is provided on the bottom plate (8), a jack cylinder (3) is provided on the square top pier (6), a shield body (9) is provided above the bottom plate (8), and a triangular top pier (1) is provided on the side wall of the shield body (9).

2. The jacking device of a shield machine according to claim 1, characterized in that: An oil circuit (4) is connected through the side wall of the jack oil cylinder (3), and a high-pressure ball valve (5) is provided on the oil circuit (4).

3. A jacking device for a shield machine according to claim 2, characterized in that: The bottom plate (8) is provided with a second square top pier (7), the second square top pier (7) being arranged on one side of the bottom plate (8), and the side wall of the shield body (9) is provided with a second triangular top pier (2).

4. A method for using a jacking device of a shield machine, characterized in that: The jacking device of a shield machine according to claim 3 comprises the following steps: Step 1: The triangular top pier 1 (1) is supported by the jack cylinder (3) to drive the shield body (9) to move upward, and a high-pressure ball valve (5) is installed on the oil circuit (4) of the jack cylinder (3) to ensure that the jack cylinder (3) can be linked and controlled individually in any combination, and the stroke of the jack cylinder (3) can be accurately controlled to prevent the shield body (9) from tipping over due to a large deviation in the jack stroke; Step 2: During the jacking process, as the jacking height increases, a steel plate is inserted between the second square top pier (7) and the second triangular top pier (2) to ensure that there is no gap or a very small gap between the second square top pier (7) and the second triangular top pier (2) during the jacking process, so as to ensure that if the jacking cylinder retracts due to external pressure loss, the weight of the shield body (9) can fall on the second square top pier (7) close to the jack cylinder (3), so as to ensure that the shield body (9) does not tip over; Step 3: Follow up the measurement work in time. When the vertical deviation of the main engine reaches the predetermined value, stop the lifting operation and fill the space between the triangular top pier 2 (2) and the square top pier 2 (7) with steel plates to allow them to bear part of the force. In the subsequent bracket transformation and reinforcement project, the force on the square top pier 2 (7) will gradually increase, and the force on the jack cylinder (3) will gradually decrease. After reaching a balance point, the forces on multiple square top piers 2 (7) will tend to be stable. Step 4: After the bracket modification, reinforcement, heightening and new track installation are completed, the main machine is slightly lifted upwards by the jack cylinder (3), and the steel plate stuffed between the triangular top pier 2 (2) and the square top pier 2 (7) is removed. The output end of the jack cylinder (3) is then slowly retracted to allow the main machine to fall onto the newly installed track.

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