Strength checking method for spoke type cutterhead structure of earth pressure balance type tunnel boring machine
A technology of earth pressure balance and structural strength, applied in the testing of machine/structural components, testing of mechanical components, instruments, etc., can solve problems such as inestimable economic losses
Active Publication Date: 2015-01-21
QINHUANGDAO TIANYE TOLIAN HEAVY INDUSTRY CO LTD
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Problems solved by technology
If the structure of the cutter head is damaged due to insufficient strength during the excavation process, the economic loss directly caused by it is incalculable
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[0027] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0028] The principle and technical scheme of a simple method for checking the strength of the spoke-type cutterhead structure of an earth pressure balance shield machine provided by the present invention are as follows: as shown in Figure 1, the earth pressure balance shield mainly consists of a cutterhead, a shield Body (including pressure soil bin), screw conveyor, segment assembly machine, synchronous grouting mechanism, propulsion cylinder, rotating motor, etc. The key part is that a thick circular sealing partition is set on the back of the cutterhead, and a closed enclosure (an extension of the front shield shell) is erected around the periphery of the partition, so that the two together...
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The invention discloses a strength checking method for a spoke type cutterhead structure of an earth pressure balance type tunnel boring machine. The method is characterized by including the following steps: step one, calculating an allowable bending stress and an allowable shearing stress of an inner ring beam; step two, checking an allowable bending stress and an allowable shearing stress of a long spoke outside a cutterhead plane; step three, analyzing a thrust resistant condition of a short spoke; step four, checking allowable bending stresses of the long and short spokes inside the cutterhead plane; and step five, checking an unsymmetrical bending stress of the long spoke. According to the method, a classical mechanic method is used for analyzing an action mechanism of the cutterhead structure of the earth pressure balance type tunnel boring machine, reverse thinking logic is adopted to provide the novel method for strength checking of the cutterhead structure. The simple, practical, safe and reliable method is adopted to solve complex problems.
Description
technical field [0001] The invention relates to the technical field of engineering machinery, in particular to a method for checking and calculating the structural strength of a spoke-type cutter head of an earth pressure balance shield machine. Background technique [0002] The shield machine system gives the cutter head equipped with a full set of cutters enough thrust and drilling force to drive through the formation; in turn, the cutter head structure must have sufficient strength to withstand and transmit these forces. If the structure of the cutter head is damaged due to insufficient strength during the excavation process, the economic loss directly caused by it is incalculable. The design of shield cutterhead involves multiple disciplines such as geotechnical, mechanical, and mechanical, so it has always been a relatively complicated and difficult subject in terms of design theory and methods. The structural strength check of the cutter head is a major technical step...
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IPC IPC(8): G01M13/00
Inventor 黄耀怡郭美琪张广谭王秀杰李文秀郭京波沈广文胡广权
Owner QINHUANGDAO TIANYE TOLIAN HEAVY INDUSTRY CO LTD