Design method for controlling deformation of deep foundation pit by using axial force servo system of steel support
A servo system and design method technology, applied in excavation, infrastructure engineering, construction, etc., can solve the problem that the lateral deformation of the enclosure structure is difficult to meet the requirements of the specification, and the deformation of the deep foundation pit is difficult to meet the deformation control requirements of the protected facilities. , The problem of low efficiency of artificial complex axial force
Inactive Publication Date: 2012-07-04
同济大学建筑设计研究院(集团)有限公司轨道交通与地下工程设计分院 +1
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Therefore, the work efficiency of adding axial force manually is low and time-consuming
For foundation pits with dozens of steel supports, it is difficult to add axial force in time during construction. Therefore, for narrow deep foundation pits with conventional steel supports in Shanghai, the lateral deformation of the enclosure st
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[0027] The design method of the present invention for controlling the deformation of a deep foundation pit using a steel support axial force servo system will be further described in detail below.
[0028] The invention will now be described in more detail with reference to the accompanying drawings, in which preferred embodiments of the invention are shown, it being understood that those skilled in the art may modify the invention described herein and still achieve the advantageous effects of the invention. Therefore, the following description should be understood as the broad knowledge of those skilled in the art, but not as a limitation of the present invention.
[0029] In the interest of clarity, not all features of an actual implementation are described. In the following description, well-known functions and constructions are not described in detail since they would obscure the invention with unnecessary detail. It should be appreciated that in the development of any ac...
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The invention discloses a design method for controlling the deformation of a deep foundation pit by using an axial force servo system of a steel support, comprising the following steps of: carrying out continuous medium finite-element analysis according to a deformation control value of a protected facility to obtain a lateral deformation control value of a space enclosing structure and an axial force control threshold value needing to be provided by a steel support; carrying out dynamic monitoring on the actual lateral deformation value of the space enclosing structure and the actual axial force output value of the steel support through detection elements and sending monitored results to an automatic control system; utilizing the automatic control system to carry out comparative analysis on the axial force control threshold value which is preset by advance computational analysis and the monitored results of all the detection elements; and controlling a hydraulic system to adjust support force of the steel support to the space enclosing structure. The design of the axial force of the steel support of the deep foundation pit is changed into an initiative pressurization regulating and controlling design from a passive stressed design so that the deformation of the space enclosing structure of the foundation pit is initiatively regulated and controlled according to control requirements of the deformation of the protected facility which is close to the deep foundation pit; and therefore, the protected facility which is close to the deep foundation pit is effectively protected.
Description
technical field [0001] The invention relates to the technical field of deep foundation pit construction, in particular to a design method for controlling the deformation of deep foundation pits by using a steel support axial force servo system. Background technique [0002] With the rapid development of Shanghai's urban construction, factors such as the shortage of land resources in the city center, traffic congestion, and high population density have restricted the sustainable development of the city. The vigorous development and utilization of underground space is an important aspect of building a conservation-oriented city and taking the road of sustainable development. While vigorously developing the urban underground space, a large number of deep foundation pit projects have been encountered. These deep foundation pits located in the center of the city are surrounded by various types of underground pipelines, and are adjacent to various buildings, subway tunnels and ot...
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Inventor 贾坚王如路谢小林罗发扬翟杰群
Owner 同济大学建筑设计研究院(集团)有限公司轨道交通与地下工程设计分院
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