Design and control method for electric power prefabricated comprehensive pipe gallery in soft soil foundation under traffic load

Abstract

The invention belongs to the technical field of urban underground comprehensive pipe gallery construction and management, and discloses a design and control method for an electric power prefabricated comprehensive pipe gallery in a soft soil foundation under traffic load. The design and control method for the electric prefabricated comprehensive pipe gallery in the soft soil foundation under the traffic load comprises the steps that the dynamic response characteristics of the prefabricated comprehensive pipe gallery in the soft soil foundation under the traffic load are determined; determining the energy transfer and deformation mechanism of the prefabricated pipe gallery system in the soft soil foundation under the traffic load; and determining an analysis theory and a calculation method of the underground comprehensive pipe gallery in the soft soil foundation under the traffic load. According to the invention, the power reaction and soft soil-pipe gallery power interaction of the prefabricated underground pipe gallery in the soft soil foundation under the traffic load are researched for the first time, and the stress deformation mechanism and the damage mode of the soft soil foundation pipe gallery structure under the traffic load are disclosed; the analysis theory of the prefabricated comprehensive pipe gallery structure is perfected, an analysis model, a calculation technology and a control method of the prefabricated comprehensive pipe gallery in the soft soil foundation under the traffic load are provided, and a theoretical basis is provided for pipe gallery design.

Description

technical field [0001] The invention belongs to the technical field of construction and management of urban underground comprehensive utility tunnels, and in particular relates to a design and control method for electric prefabricated comprehensive utility tunnels in soft soil foundations under traffic loads. Background technique [0002] At present, with the development of urbanization, the construction and management technology of urban underground comprehensive pipe corridors are becoming more and more perfect, but the current research on the design and construction technology of urban comprehensive pipe corridors is still not systematic, with few achievements, and is still in the process of exploration and gaining experience. Although my country's "Technical Code for Urban Comprehensive Pipe Gallery Engineering" GB50838-2015 has been released and implemented, it has not given specific standards for detailed design, construction methods, materials and equipment. There ar...

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Problems solved by technology

[0016] (1) Although my country's "Technical Specifications for Urban Comprehensive Pipe Gallery Engineering" GB50838-2015 has been released and implemented, it has not given specific standards for detailed design, construction methods, materials and equipment, and the corresponding standard system in my country is not perfect

[0017] (2) The regulations on the allowable value of the existing foundation settlement are quite different, and many allowable values ​​are obtained on the basis of engineering experience. At present, there are few relevant research results on the underground pipe gallery; There are few systematic studies on new underground structures, and there are no representative results in the research on the dynamic characteristics of underground utility corridors under the action of traffic loads.

[0018] (3) The existing technology uses finite element software (Midas Gen) to conduct static analysis on a proposed single-cabin and double-cabin underground pipe gallery structure, but does not consider the vehicle dynamic load characteristics and its long-term impact

[0019] (4) The current research on the dynamic response of tunnels under traffic loads mainly focuses on the dynamic analysis under simple axisymmetric loads, which is far from the dynamic response of tunnels under general traffic loads (usually non-axisymmetric)

[0020] (5) The calculation assumptions based on the structural calculation model adopted by the current underground comprehensive pipe gallery project are somewhat different from the actual situation, and the influence of the structure under the action of asymmetric loads is not considered, including the structure of the pipe gallery under the action of asymmetric loads Transverse and longitudinal deformations and internal forces, calculated without considering changes in earth pressure

[0021] (6) At present, there are few in-depth studies on the mechanical behavior response, damage or disease of various parts and their mechanisms of underground pipe gallery structures under soft soil geological conditions at home and abroad, and vehicle loads (especially heavy loads) under actual traffic conditions are rarely considered. Various adverse effects on the structure of shallow buried underground pipe gallery due to its impact

[0022] (7) The existing technology is still lacking in the understanding of the deformation mechanism and law of the operating pipe gallery under the action of traffic loads and the research on the allowable deformation control method. The design and construction of the comprehensive pipe gallery in the technical specifications for urban comprehensive Clearly stipulate how to take into account the effects of surrounding vehicle loads, etc.

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