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Spoke shield cutter head with variable excavation profile and its construction method

A technology of shield cutter head and profile surface, which is applied in the direction of earth drilling, mining equipment, tunnels, etc., can solve the problems of long construction period, affecting long-term properties, and large formation disturbance, so as to improve cutting efficiency and optimize force characteristics , the effect of improving adaptability

Active Publication Date: 2019-05-10
NINGBO UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the acceleration of the urbanization process, the underground space, as another valuable resource of the city, has been intensively developed and utilized. As a result, the underground space has become more and more crowded, and the requirements for the control of underground engineering construction have increased. The advantage of its small environmental disturbance has been widely used in the construction of urban rail transit. The construction of its connecting passages is usually excavated by the mining method after freezing or grouting reinforcement. This method has a long construction period and large disturbance of the ground during the construction process. It will not only have a large instantaneous impact on the structure of the subway tunnel and surrounding buildings, but also affect its long-term properties
If the shield tunneling method can be used to construct the communication channel without reinforcing the soil, the construction period can be reduced and the disturbance to the stratum caused by the construction can be reduced. It is necessary to remove the shield segments on the left and right sides. The structure of the conventional cutter head is fixed and cannot be adjusted according to the form of the cutting structure. The force characteristics of the shield will also affect the tunneling efficiency of the shield

Method used

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  • Spoke shield cutter head with variable excavation profile and its construction method
  • Spoke shield cutter head with variable excavation profile and its construction method
  • Spoke shield cutter head with variable excavation profile and its construction method

Examples

Experimental program
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Effect test

specific Embodiment 1

[0028] A spoke-type shield cutter head with variable excavation profile, such as figure 1 As shown, it includes a central rotary shaft 1 of the shield cutterhead, several cutterhead spokes 2, several spoke rotation control devices 3, several cutterhead spoke sliding shafts 4, a central knife control device 5, and several spoke cutter control devices. Device 6, a central cutter 7 and several spoke cutters 8; each cutterhead spoke 2 is hingedly installed around the top of the shield cutterhead central rotary shaft 1 through a hinge joint 9 respectively, and the cutterhead spokes 2 can follow the shield cutterhead The rotation of the central rotary shaft 1 rotates; the cutterhead spoke sliding shaft 4 is welded on the side of the cutterhead spoke 2 facing the bottom surface of the shield cutterhead central rotary shaft 1, and the bottom of the spoke rotation control device 3 is welded on the shield cutterhead center back The bottom of the rotating shaft 1 and the top of the spok...

specific Embodiment 2

[0033] The general method of using the spoke-type shield cutter head with variable excavation profile described in the above-mentioned specific embodiment 1 is described below. The specific embodiment takes the excavation profile changed from the original planar shape to a circular curved surface as an example. It shows that the excavation profile surface 10 of the cutter head that can be realized by the spoke-type shield cutter head with variable excavation profile surface is arbitrarily variable, not limited to plane shape and curved surface shape, and the specific steps are as follows:

[0034] Step 1: Calculate the cutter head excavation profile surface 10 according to the shape of the target structure, and obtain the required rotation angle of the cutter head spoke 2 θ i , the i is the number of cutter head spoke 2, θ i is marked as i The required rotation angle value of the cutter head spoke 2, where i =[1:2:...: n ], the required elongation of the center knife con...

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Abstract

The invention discloses a spoke type shield tunneling cutter with a variable digging profile and a construction method thereof. The spoke type shield tunneling cutter comprises a shield tunneling cutter central spindle, wherein a plurality of cutter spokes are hinged on the top periphery of the shield tunneling cutter central spindle; a cutter spoke sliding shaft is welded on one side of the cutter spokes facing to the bottom of the shield tunneling cutter central spindle; a spoke rotating control device is welded at the bottom of the shield tunneling cutter central spindle; a central cutter control device is welded in the top of the shield tunneling cutter central spindle; a central cutter is welded at the top of the central cutter control device; spoke cutter control devices are welded in the cutter spokes in the form of a dot matrix; spoke cutters are welded at the top of the spoke cutter control devices; and the stretching of the spoke cutters can control the change in space position of the spoke cutters. The spoke type shield tunneling cutter has the advantages that the geometrical shape of the shield tunneling digging profile can be adjusted in real time according to the practical requirement through the rotation of the cutter spokes and the variable space positions of the spoke cutters and the central cutter, the adaptability of the shield tunneling construction can be greatly promoted, and the mechanical characteristic of the cutter can be optimized.

Description

technical field [0001] The invention relates to a shield cutter head, in particular to a spoke type shield cutter head with variable excavation profile and a construction method thereof. Background technique [0002] With the acceleration of the urbanization process, the underground space, as another valuable resource of the city, has been intensively developed and utilized. As a result, the underground space has become more and more crowded, and the requirements for the control of underground engineering construction have increased. The advantage of its small environmental disturbance has been widely used in the construction of urban rail transit. The construction of its connecting passages is usually excavated by the mining method after freezing or grouting reinforcement. This method has a long construction period and large disturbance of the ground during the construction process. It will not only have a relatively large instantaneous impact on the structure of the subway...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D9/08
CPCE21D9/08
Inventor 朱瑶宏
Owner NINGBO UNIV