Pipe top vertical soil pressure calculation method and device suitable for non-slotting pipe jacking construction

Abstract

The invention discloses a pipe top vertical soil pressure calculation method and device suitable for non-grooving pipe jacking construction. The method comprises the steps that macroscopic parameters of a soil body in a non-grooving pipe jacking construction area and the overexcavation amount of a pipe jacking machine are obtained; establishing a discrete element model according to the pipeline design parameters and the macroscopic parameters of the soil body, and carrying out numerical simulation on the soil body movement process caused by the overexcavation amount so as to determine the development height of a pipe top shear zone and the average width of the shear zone; and according to the macroscopic parameters of the soil body, the development height of the pipe top shear zone and the average width of the shear zone, the pipe top vertical soil pressure of the non-slotting pipe jacking construction is calculated. By implementing the method, the discrete element method is adopted to perform numerical simulation on the moving process of the pipe top soil so as to determine the development height and width of the pipe top shear zone. Therefore, theoretical analysis and discrete element numerical simulation are combined in calculation of the pipe top vertical soil pressure, the actual engineering situation is better met, and the accuracy of the calculation result is obviously improved compared with an existing theoretical formula or method.

Description

technical field [0001] The invention relates to the technical field of trenchless pipeline installation and laying, in particular to a method and device for calculating the vertical earth pressure of a pipe top suitable for pipe jacking construction without grooves. Background technique [0002] With the gradual improvement of environmental protection awareness, the limitation of urban construction space and the serious impact of traditional excavation construction on road traffic, trenchless technology (ie, the construction method of pipe jacking without slotting) has gradually replaced traditional slotting construction and has become an urban The preferred construction technology for pipeline network construction. [0003] When this construction method is adopted, the vertical earth pressure on the top of the buried pipeline is the main basis for engineering design. Therefore, it is of great practical significance for engineering practice to accurately calculate the verti...

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Problems solved by technology

[0004] In view of this, the embodiment of the present invention provides a method and device for calculating the vertical earth pressure of the pipe top suitable for the construction of pipe jacking without slotting, so as to solve the problem of vertical earth pressure of the pipe top in the prior art for the construction of pipe jacking without slotting. Technical problem of inaccurate calculation of theoretical formula or method for calculation of earth pressure

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