Bucket type open shield tunneling machine with front eave supporting function
By introducing the front eaves support device into the bucket-type open shield machine, and inserting the support barrel and shovel head into the palm surface, the problem of easy collapse of the tunnel during construction is solved, and stable support for the soft soil strata is achieved , simplifies construction processes and reduces costs.
Patent Information
- Application Number
- CN202420390253.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-01
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-03-01
AI Technical Summary
The bucket-type open shield machine lacks the front eaves support function during construction, resulting in the soft soil strata tunnels prone to collapse. The existing advanced drilling + grouting hardening method is time-consuming and labor-intensive, and is not suitable for construction with limited budgets and tight construction periods.
A bucket-type open shield machine with front eaves support function is designed, using a support frame, rotating support, telescopic arm, drive oil cylinder and front eaves support device in the shield, including support barrel and shovel The head and support cylinder are inserted into the palm surface through the support cylinder and the shovel head to form a front eaves support to avoid collapse.
It realizes stable support to the upper part of the palm surface during bucket construction, avoids tunnel collapse, simplifies construction process, and reduces project volume and cost.
Smart Images
Figure CN222162612U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of shield machines, in particular to a bucket type open shield machine with a front eaves supporting function. Background Art
[0002] The shield machine has the functions of excavating soil, transporting slag, and lining tunnels. It is widely used in tunnel construction in the fields of subways, railways, and highways. The bucket-type open shield machine is a type of shield machine. It drives the retractable bucket to rotate by rotating the support, and uses the bucket to excavate the soil to form a tunnel. The tunnel construction can then be completed by moving the shield forward and using the lining mechanism at the rear for lining support.
[0003] However, most of these bucket-type open shield machines do not have the function of front eaves support. During bucket construction, as the soil below the face is excavated, the supporting effect of the stratum above it gradually weakens. For hard rock strata, some conditions are small and the tunnel shape can be maintained by the structural characteristics of the stratum itself, but for soft soil strata, it is basically impossible to maintain, and the tunnel collapse at the face is very likely to occur, affecting the construction progress. To solve this problem, the method of advanced drilling + grouting hardening is usually adopted, but this method takes a long time and is expensive. The hardened stratum will also seriously increase the construction workload. It is not applicable to tunnel construction with limited budget and tight schedule. Utility Model Content
[0004] The purpose of the utility model is to overcome one or more disadvantages in the prior art and to provide a bucket type open shield machine with a front eaves supporting function.
[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is that a bucket-type open shield machine with a front eaves support function comprises:
[0006] A shield body, wherein a support frame is provided in the shield body;
[0007] A rotating support, the rotating support is connected to the support frame and is located at the center of the shield body;
[0008] A telescopic arm, the rear end of the telescopic arm is connected to the rotating support, and the front end of the telescopic arm is provided with a rotatable bucket;
[0009] A driving cylinder, wherein the driving cylinder is arranged on the telescopic arm and is used to drive the bucket to move so as to realize excavation of the face;
[0010] The shield body is also provided with a front eave support device, which is located above the axis of the shield body. The front eave support device includes a support tube, a shovel head, and a support cylinder. The support tube extends in the front and rear directions and is axially movably connected to the inner wall of the shield body. The shovel head is connected to the front end of the support tube, and the rear end of the support cylinder is connected to the support frame. The front end of the support cylinder is connected to the support tube. When the support cylinder is actuated, it can push the support tube to move forward, so that the shovel head is inserted into the palm face to form a front eave support.
[0011] Preferably, there are multiple front eaves supporting devices, one of which is located directly above the axis of the shield body, and the remaining front eaves supporting devices are symmetrically distributed on both sides of the front eaves supporting device and arranged in a close fit along the circumferential direction of the shield body.
[0012] Further preferably, the angle occupied by all the front eaves supporting devices in the circumferential direction of the shield body is 150° to 170°.
[0013] Further preferably, the angle occupied by a single front eave supporting device in the circumferential direction of the shield body is 22°.
[0014] Further preferably, the upper side walls of the support tubes are made of arc-shaped plates, and when the front eaves support is formed, the upper side walls of all the support tubes constitute arc-shaped supporting surfaces, and there are gaps between adjacent support tubes.
[0015] Preferably, both ends of the support tube are open, and the support cylinder is inserted into the support tube from the rear and is coaxially arranged with the support tube.
[0016] Further preferably, the rear end of the support cylinder is rotatably connected to the support frame through a hinge support, and the front end of the support cylinder is rotatably connected to the rear side wall of the shovel head through the cooperation of a pin shaft and a support ear.
[0017] Preferably, the inner wall of the shield body is connected with a plurality of support rings, and the support tube is axially movably disposed through the support rings.
[0018] Preferably, a plurality of annular reinforcement plates are connected to the inner wall of the support tube, and adjacent annular reinforcement plates are arranged at intervals.
[0019] Preferably, the shovel head is a box-type structure, and the front side plate of the shovel head is an inclined plate extending backward and inward, and when the shovel head is inserted into the tunnel face, the inclined plate can press down the soil.
[0020] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:
[0021] The utility model provides a bucket-type open shield machine with a front eaves support function, comprising a shield body with a support frame arranged inside, a rotating support connected to the support frame and located at the center of the shield body, a telescopic arm with a bucket arranged at the front end connected to the rotating support at the rear end, and a driving cylinder arranged on the telescopic arm for driving the bucket to move. A front eaves support device is arranged in the shield body so that it is located above the axial center line of the shield body, and comprises a support tube, a shovel head, and a support cylinder, so that the support tube extends in the front and rear directions and is axially movably connected to the inner wall of the shield body, the shovel head is connected to the front end of the support tube, the rear end of the support cylinder is connected to the support frame, and the front end is connected to the support tube. When the support cylinder is actuated, the support tube can be pushed to move forward, so that the shovel head is inserted into the face, and the support tube lies between the upper part of the face and the shield body, thereby forming a front eaves support to prevent the upper part of the face from collapsing. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 It is a cross-sectional schematic diagram of a preferred embodiment of the utility model.
[0023] Figure 2 yes Figure 1 A partial enlarged schematic diagram of the front part of the middle shield, where the dotted line shows the state of the shovel head when it is inserted into the tunnel face.
[0024] Figure 3 yes Figure 2 Schematic diagram of the structure of the middle front eaves support device.
[0025] Figure 4 yes Figure 2 Schematic diagram of the left side.
[0026] Among them: 10. Shield body; 11. Support frame; 12. Front eaves support device; 121. Support tube; 122. Shovel head; 123. Support cylinder; 124. Hinge support; 125. Pin shaft; 126. Sealing plate; 127. Annular reinforcement plate; 128. Inclined plate; 13. Support ring; 20. Rotating support; 30. Telescopic arm; 31. Bucket; 40. Driving cylinder. DETAILED DESCRIPTION
[0027] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art.
[0028] like Figures 1 to 4As shown, the bucket-type open shield machine with a front eaves support function provided by the utility model comprises: a shield body 10, a rotating support 20, a telescopic arm 30 and a driving cylinder 40, wherein a support frame 11 for supporting the shield body 10 outward is provided in the shield body 10, and the rotating support 20 is connected to the support frame 11 and is located at the center of the shield body 10; the rear end of the telescopic arm 30 is connected to the rotating support 20, and the front end of the telescopic arm 30 is provided with a rotatable bucket 31; the driving cylinder 40 is arranged on the telescopic arm 30, and the hydraulic rod of the driving cylinder 40 is connected to the bucket 31, and the driving cylinder 40 is used to drive the bucket 31 to move, so as to realize the excavation of the face; the shield body 10 is also provided with a front eaves support device 12 The front eaves support device 12 is located above the axis of the shield body 10. The front eaves support device 12 includes a support tube 121, a shovel head 122, and a support cylinder 123. The support tube 121 extends in the front and rear directions and is axially movably connected to the inner wall of the shield body 10. The shovel head 122 is connected to the front end of the support tube 121, and the rear end of the support cylinder 123 is connected to the support frame 11. The front end of the support cylinder 123 is connected to the support tube 121. When the support cylinder 123 is actuated, it can push the support tube 121 to move forward, so that the shovel head 122 is inserted into the palm face, and the support tube 121 is across between the upper part of the palm face and the shield body 10, thereby forming a front eaves support to prevent the upper part of the palm face from collapsing.
[0029] In this embodiment, there are seven front eaves supporting devices 12, one of which is located directly above the axis of the shield body 10, and the remaining front eaves supporting devices 12 are symmetrically distributed on both sides of the front eaves supporting device 12 and arranged in a close fit along the circumferential direction of the shield body 10.
[0030] In order to ensure the effect of the front eaves support and minimize the space occupied in the shield body 10, preferably, the combination of all the front eaves support devices 12 occupies an angle of 140° to 170° in the circumferential direction of the shield body 10. In the present embodiment, the angle is 154°, and the angle occupied by a single front eaves support device 12 in the circumferential direction of the shield body 10 is 22°.
[0031] In this embodiment, the upper side wall of the support tube 121 is made of an arc-shaped plate. When the front eaves support is formed (when the support cylinders 123 of all the front eaves support devices 12 are in action), the upper side walls of all the support tubes 121 constitute an arc-shaped support surface, and there is a gap between adjacent support tubes 121 to avoid interference.
[0032] In this embodiment, both ends of the support tube 121 are open, and the support cylinder 123 is inserted into the support tube 121 from the rear and is coaxially arranged with the support tube 121. In order to enable the support cylinder 123 to move smoothly, the rear end of the support cylinder 123 is rotatably connected to the support frame 11 through a hinge support 124, and the front end of the support cylinder 123 is rotatably connected to the rear side wall of the shovel head 122 through the cooperation of the pin shaft 125 and the support ear. In order to facilitate the disassembly and assembly of the pin shaft 125, an installation window and a sealing plate 126 for sealing the installation window are also provided on the arc plate of the support tube 121, and the sealing plate 126 is detachably connected to the arc plate of the support tube 121.
[0033] To facilitate the sliding connection of the support tube 121 , in the present embodiment, a plurality of support rings 13 are connected to the inner wall of the shield body 10 , and the support tube 121 is axially movable through the support rings 13 .
[0034] In order to enhance the strength of the supporting tube 121 , further, a plurality of annular reinforcing plates 127 are connected to the inner wall of the supporting tube 121 , and adjacent annular reinforcing plates 127 are arranged at intervals along the front-to-back direction.
[0035] In this embodiment, the shovel head 122 is a box-type structure, and the front side plate of the shovel head 122 is an inclined plate 128 extending backward and inward. When the shovel head 122 is inserted into the tunnel face, the inclined plate 128 can press down the soil.
[0036] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with this technology to understand the content of the utility model and implement it accordingly. They cannot be used to limit the protection scope of the utility model. All equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.
Claims
1. A bucket-type open shield machine with front eaves support function, comprising: A shield body, wherein a support frame is provided in the shield body; A rotating support, the rotating support is connected to the support frame and is located at the center of the shield body; A telescopic arm, the rear end of the telescopic arm is connected to the rotating support, and the front end of the telescopic arm is provided with a rotatable bucket; A driving cylinder, wherein the driving cylinder is arranged on the telescopic arm and is used to drive the bucket to move so as to realize excavation of the face; Features: The shield body is also provided with a front eave support device, which is located above the axis of the shield body. The front eave support device includes a support tube, a shovel head, and a support cylinder. The support tube extends in the front and rear directions and is axially movably connected to the inner wall of the shield body. The shovel head is connected to the front end of the support tube, and the rear end of the support cylinder is connected to the support frame. The front end of the support cylinder is connected to the support tube. When the support cylinder is actuated, it can push the support tube to move forward, so that the shovel head is inserted into the palm face to form a front eave support.
2. The bucket-type open shield machine with front eaves support function according to claim 1, characterized in that: There are multiple front eaves supporting devices, one of which is located directly above the axis of the shield body, and the remaining front eaves supporting devices are symmetrically distributed on both sides of the front eaves supporting device and arranged in a close fit along the circumferential direction of the shield body.
3. The bucket-type open shield machine with front eaves support function according to claim 2, characterized in that: The angle occupied by all the front eaves supporting devices in the circumferential direction of the shield body is 150° to 170°.
4. The bucket-type open shield machine with front eaves support function according to claim 2, characterized in that: The angle occupied by a single front eaves supporting device in the circumferential direction of the shield body is 22°.
5. The bucket-type open shield machine with front eaves support function according to claim 2, characterized in that: The upper side walls of the support tubes are made of arc-shaped plates. When the front eaves support is formed, the upper side walls of all the support tubes constitute arc-shaped supporting surfaces, and there are gaps between adjacent support tubes.
6. The bucket-type open shield machine with front eaves support function according to claim 1, characterized in that: The supporting tube has openings at both ends, and the supporting oil cylinder is inserted into the supporting tube from the rear and is coaxially arranged with the supporting tube.
7. The bucket-type open shield machine with front eaves support function according to claim 6, characterized in that: The rear end of the support oil cylinder is rotatably connected to the support frame through a hinge support, and the front end of the support oil cylinder is rotatably connected to the rear side wall of the shovel head through the cooperation of a pin shaft and a support ear.
8. The bucket-type open shield machine with front eaves support function according to claim 1, characterized in that: The inner wall of the shield body is connected with a plurality of support rings, and the support tube is axially movably arranged in the support rings.
9. The bucket-type open shield machine with front eaves support function according to claim 1, characterized in that: The inner wall of the support tube is connected with a plurality of annular reinforcement plates, and adjacent annular reinforcement plates are arranged at intervals.
10. The bucket-type open shield machine with front eaves support function according to claim 1, characterized in that: The shovel head is a box-type structure, and the front side plate of the shovel head is an inclined plate extending backward and inward. When the shovel head is inserted into the tunnel face, the inclined plate can press down the soil.