CN-121993216-A - Ultra-large-section quasi-rectangular shield multi-cutter-disc driving excavation device and method

Abstract

The invention relates to the technical field of shield machines, and discloses a device and a method for excavating a super-large-section quasi-rectangular shield with multiple cutter disc drives. The technical problems that in the prior art, cutting blind areas are difficult to eliminate, energy consumption and abrasion are high due to uneven load of a driving system, overheat reliability of a transmission part is insufficient, and gesture control precision of ultra-large section tunneling is poor are solved. The invention comprises a quasi-rectangular shield shell, wherein a plurality of cutter head assemblies with different sizes are arranged on the shield shell, the cutter head assemblies comprise at least two center cutter heads arranged in the center area of the shield shell, corner cutter heads arranged in four corner areas of the shield shell, a plurality of edge cutter heads are arranged in the edge areas between the center cutter heads and the corner cutter heads, and a plurality of preceding cutters are fixedly connected at gaps between the cutter head assemblies and the shield shell. According to the invention, the rotation direction can be freely adjusted according to actual geological conditions and excavation requirements, and the conditions of soil hardness change, rock distribution imbalance and the like can be effectively applied.

Inventors

• FU DAXI
• ZHANG YANGKAI
• LI JUN
• SUN BENBO
• Han mengze
• TAN JUNKUN
• ZHOU ZHENLIANG
• YANG YANDONG
• YAN CHANGBIN
• LI SHUAIYUAN
• LU ZHIYONG
• LU GAOMING
• XU ZIWEN
• ZHAO WENBO
• LIU YONGSHENG
• GUO YANWEI
• FAN WENCHAO
• WEI TAO
• LIU CHAOYIN
• ZHOU JIANJUN
• ZHANG ZHIZENG

Assignees

• 河南省中工设计研究院集团股份有限公司
• 盾构及掘进技术国家重点实验室
• 中铁隧道局集团有限公司

Dates

Publication Date

20260508

Application Date

20260126

Claims (7)

1. 1. The utility model provides an oversized section class rectangle shield constructs multitool dish drive excavation device which characterized in that: The shield shell comprises a shield shell body in a similar rectangular shape, a plurality of cutter head assemblies with different sizes are arranged on the shield shell body, each cutter head assembly comprises at least two center cutter heads arranged in the center area of the shield shell body and corner cutter heads arranged in the four corner areas of the shield shell body, a plurality of edge cutter heads are arranged in the edge areas between the center cutter heads and the corner cutter heads, a plurality of preceding cutters are fixedly connected to gaps between the shield shell body and the cutter head assemblies, a transmission rod is fixedly connected to the back surface of the cutter head assemblies, the end parts of the transmission rod are fixedly connected with a flange plate so as to drive the cutter head assemblies to rotate, a driving module is arranged on the cutter head assemblies through the transmission rod, the driving module comprises a motor, an output shaft of the motor is provided with a planetary gear structure, the planetary gear structure comprises a sun gear connected with the motor, the sun gear is meshed with a plurality of planetary gears, and the outer sides of the planetary gears are meshed with a gear ring gear so as to drive the cutter head assemblies to rotate.
2. 2. The ultra-large section quasi-rectangular shield multi-cutter-disc driving excavation device of claim 1, wherein an external supporting rod is further arranged on the back surface of the cutter disc assembly.
3. 3. The ultra-large section rectangular shield multi-cutter-disc driving excavating device of claim 1 wherein the surface of the shield shell is provided with a plurality of cutter disc caulking grooves for rotationally installing cutter disc components.
4. 4. The ultra-large section rectangular shield multi-cutter disc driving excavation device of claim 1, wherein cooling liquid holes are formed in the cutter disc caulking groove, and the cooling liquid holes are connected with external cooling liquid equipment.
5. 5. The ultra-large section rectangular shield multi-cutter disc driving excavation device of claim 1, wherein a wear-resistant coating is arranged on the inner wall of the cutter disc caulking groove, and the wear-resistant coating is a tungsten carbide-based composite material wear-resistant coating.
6. 6. The ultra-large-section rectangular shield multi-cutter-head driving excavation method is suitable for the ultra-large-section rectangular shield multi-cutter-head driving excavation device according to any one of claims 1 to 1, and is characterized by comprising the following steps: the method comprises the following steps of S1, driving a cutterhead, namely connecting an external power source through a flange mounting plate and an external supporting rod, driving a cutterhead assembly through an independent driving module, and adjusting the rotation direction of the cutterhead assembly in the excavation process according to actual geological conditions and excavation requirements, wherein the rotation direction comprises forward rotation and reverse rotation; S2, cooperatively excavating, namely firstly enabling a preceding cutter fixed on a shield shell to contact soil body and pre-cut and loosen the soil body in the initial stage of excavating, and then cooperatively rotating a central cutter disc, a corner cutter disc and an edge cutter disc to completely cut the pretreated soil body to form a rectangular-like tunnel section; S3, cooling the cutterhead, namely continuously flowing cooling liquid into the caulking groove of the cutterhead through the cooling liquid hole in the process of excavating the cutterhead, and cooling the cutterhead assembly; and S4, wear-resistant protection, namely, resisting friction and impact in the transmission process of the cutterhead assembly through a tungsten carbide-based composite wear-resistant coating arranged on the inner wall of the caulking groove of the cutterhead, and protecting the shield shell structure.
7. 7. The method for excavating ultra-large section rectangular shield multi-cutter driving according to claim 6, wherein the cutter driving in the step S1 further comprises the steps of starting a motor of a driving module to drive a sun gear to rotate, enabling the sun gear to drive a plurality of planetary gears meshed with the sun gear to rotate around the axis of the sun gear, outputting power through a planetary gear structure under the meshing action of the sun gear and a gear ring, transmitting the power to the cutter assembly through a transmission rod to drive the cutter assembly to rotate, and independently controlling the rotation direction and the rotation speed of each cutter assembly according to actual geological conditions and excavation requirements.

Description

Ultra-large-section quasi-rectangular shield multi-cutter-disc driving excavation device and method Technical Field The invention relates to the technical field of shield machines, in particular to a device and a method for excavating a super-large-section quasi-rectangular shield with multiple cutter disc drives. Background Along with the continuous deep development of urban underground space, tunnel engineering such as subways, comprehensive pipe racks, underground roads and the like has higher requirements on construction efficiency and space utilization rate. Compared with the traditional circular tunnel, the rectangular-like tunnel section can more effectively utilize underground space, reduce land feature consumption and reduce disturbance to surrounding environment, so that the rectangular-like tunnel section becomes one of important directions of tunnel engineering development. The shield method is used as a main stream tunneling technology and is applied to rectangular-like tunnel construction. In order to realize rectangular section-like excavation, the prior art adopts a scheme of multi-cutterhead combined excavation. However, these prior art solutions, when applied to oversized section rectangular-like tunnels, gradually expose a number of technical bottlenecks, namely firstly, excavation coverage and cutting efficiency problems. Simple multi-cutter-disc layout is difficult to completely adapt to complex geometric outlines of rectangular-like shapes, particularly rectangular-like shapes with ultra-large cross sections. Cutting blind areas are easily generated at four corners of the cross section and at long-side edge areas between the center and the corners. In order to cover the blind areas, the shield machine is often required to repeatedly adjust the gesture to carry out trimming, which seriously affects the tunneling efficiency and has poor quality of the formed section. Second, uneven loading and equipment loss problems. In the tunneling process, due to the fact that the soil properties of different areas of the excavated surface possibly have differences, the traditional linkage driving or simple grouping driving mode leads to overload of part cutterhead and underload of part cutterhead at soft and hard junctions, so that the load distribution of a driving system is extremely uneven, the energy consumption is high, abnormal abrasion and even damage of the cutterhead and a transmission part can be caused, and the service life of equipment is greatly shortened. Again, thermal management and reliability issues. When the shield machine digs hard rock or high-strength soil layer, a great amount of heat can be generated at key transmission parts such as a cutter head main shaft bearing and the like. The existing cooling scheme is often not direct and efficient enough, so that heat accumulation at the bearing part is caused, lubricating oil is invalid, serious faults such as bearing ablation and clamping are easily caused, and the safety production of the whole engineering is threatened. Finally, the problem of directional control accuracy is solved. The surrounding stratum resistance of the ultra-large section shield machine is more complex, the traditional mode of carrying out attitude control by adjusting the shield jack is slow in response and insufficient in precision, the tunnel axis is easy to deviate from a designed line, and the abnormal loss of equipment is further aggravated in the deviation rectifying process. The China patent literature 201710433146.9 discloses a multi-cutter driving system for tunneling equipment, a cutter head and tunneling equipment, the multi-cutter driving system comprises at least one driving unit, the driving unit comprises a plurality of groups of frequency converters and a plurality of groups of cutter head driving assemblies which are arranged corresponding to the cutter head, each group of cutter head driving assemblies comprises a plurality of driving motors, the number of the frequency converters of each group of driving units is equal to that of the driving motors of each group of cutter head driving assemblies, the output ends of the frequency converters are connected with the driving motors in a one-to-one correspondence manner, the cutter head comprises a cutter head body and the multi-cutter driving system for tunneling equipment, the multi-cutter driving system is in driving connection with the cutter head body, the tunneling equipment comprises a shield body and the cutter head, and the cutter head is arranged at the front end of the shield body. However, in the implementation process, at least the following technical problems are existed that when the traditional single-cutter-disc shield machine faces an oversized-section tunnel, due to the large excavation area and complex geological conditions, the problems of low excavation efficiency, serious cutter disc abrasion, poor adaptability and the like are often existed, the problems not only increa