Method for designing excavation surface of foundation pit of tunnel open excavation section on basis of BIM

Abstract

The invention discloses a method for designing an excavation surface of a foundation pit of a tunnel open excavation section on the basis of BIM. The method comprises the following steps: S1, settinga three-dimensional space line position of the tunnel open excavation section; S2, setting a digital three-dimensional terrain of the tunnel open excavation section; S3, building a tunnel main body structural model of the open excavation section; S4, generating a control line for the excavation surface of the foundation pit of the tunnel open excavation section; S5, generating a sloping line of the excavation surface of the foundation pit of the tunnel open excavation section; S6, controlling height of the excavation surface of each level by virtue of height and generating the excavation surface; S7, controlling the height of the excavation surface of each level by virtue of elevation and generating the excavation surface; S8, generating a final slope cutting model; and S9, reading maximumexcavation depth of the excavation surface. The method disclosed by the invention realizes design of the excavation surface of the foundation pit of the tunnel open excavation section in a three-dimensional scene, is an indispensable link in tunnel BIM design and has obvious popularization and application values.

Description

technical field [0001] The invention relates to a BIM-based tunnel design method, in particular to a BIM-based design method for a foundation pit excavation surface of an open cut section of a tunnel. Background technique [0002] Existing excavation face design of open-cut sections of tunnels is mainly based on the traditional two-dimensional design of the cross-section method. Not only is the operation process cumbersome, but it is also difficult to accurately reflect the slope height between the cross-sections, which greatly reduces the quality of tunnel design. In recent years, BIM technology has become the development trend of the civil engineering industry. Therefore, whether it is to comply with the development of the industry or to improve the design accuracy and quality, the design method of the excavation surface of the foundation pit of the tunnel open-cut section based on BIM is in urgent need of research. Contents of the invention [0003] In view of the exist...

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Problems solved by technology

[0002] The design of the excavation surface of the existing open-cut section of the tunnel is mainly based on the traditional two-dimensional design of the cross-section method. Not only is the operation process cumbersome, but it is also difficult to accurately reflect the height of the brush slope between the cross-sections, which greatly reduces the quality of the tunnel design.

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