Method for analyzing influence of shallow-buried and underground-excavated tunnel pipe curtain reinforcement on ground and pile foundation
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A technology of shallow burial and underground excavation and analysis method, applied in image data processing, special data processing application, 3D modeling, etc. problems, to achieve the effect of avoiding engineering accidents
Pending Publication Date: 2020-11-06
JINAN UNIVERSITY
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At the same time, the excavation of the tunnel will disturb the strata. Due to the joint action of the pile and soil, the bearing capacity of the pile foundation will change, resulting in the settlement of the pile foundation.
Therefore, with the excavation of the tunnel, it is easy to cause the deformation of the ground, which will cause the displacement and settlement of the ground and the pile foundation, resulting in serious engineering accidents.
[0003] In the face of the complex urban undergro
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Embodiment 1
[0067] This embodiment discloses an analysis method for the impact of pipe curtain reinforcement on the ground and pile foundations of shallow-buried tunnels, which can be applied to actual subway tunnel construction projects, such as figure 1 As shown, the steps are as follows:
[0068] S1. For the shallow buried tunnel project to be constructed, use the finite element software to establish the corresponding construction model and construction stage under the reinforcement of the pipe curtain.
[0069] In this embodiment, the finite element software used is MIDAS-GTS (Geotechnical and Tunnel Analysis System), and the construction model is a pile-soil-tunnel model, which is a finite element model.
[0070] The construction model and construction phases are constructed as follows:
[0071] S11. Define the properties and parameters of various materials, including soil, pile foundation, pile cap, primary support, secondary lining, temporary steel support and pipe curtain reinfor...
Embodiment 2
[0137] This embodiment discloses a computing device, which includes a processor and a memory for storing executable programs of the processor. When the processor executes the program stored in the memory, the pipe curtain of the shallow buried tunnel described in Embodiment 1 is realized. The analysis method for the impact of reinforcement on the ground and pile foundation is as follows:
[0138] S1. For the shallow buried tunnel project to be constructed, use the finite element software to establish the corresponding construction model and construction stage under the reinforcement of the pipe curtain;
[0139] S2. According to the analysis and calculation of the finite element results in the construction stage, the simulated values of ground settlement and pile foundation displacement under the reinforcement of pipe curtains for shallow buried tunnels are obtained;
[0140] S3. Calculation and analysis of the impact of tunnel construction on ground subsidence without pipe ...
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Abstract
The invention discloses a method for analyzing the influence of shallow-buried and underground-excavated tunnel pipe curtain reinforcement on the ground and a pile foundation, and the method comprisesthe following steps: firstly building a construction model and a construction stage under the pipe curtain reinforcement through finite element software for a to-be-constructed shallow-buried and underground-excavated tunnel project; analyzing and calculating a finite element result for the construction stage to obtain a ground subsidence and pile foundation displacement simulation value under shallow-buried and underground-excavated tunnel pipe curtain reinforcement; calculating and analyzing the influence of tunnel construction on ground subsidence during pipe-roofing-free reinforcement andthe influence of tunnel construction on the pile foundation under the advanced small guide pipe pre-reinforcement scheme to obtain corresponding simulation values, and finally obtaining correspondingpile foundation subsidence and deformation trends in combination with the ground subsidence and pile foundation displacement simulation values under pipe-roofing-free reinforcement. According to theinvention, the ground subsidence value and the pile foundation displacement value caused by construction of the tunnel under pipe roofing reinforcement can be accurately obtained, and meanwhile the maximum subsidence and deformation position can be visually observed.
Description
technical field [0001] The invention relates to the technical field of pipe curtain reinforcement for shallow-buried tunnels, in particular to an analysis method for the influence of pipe curtain reinforcement for shallow-buried tunnels on the ground and pile foundations. Background technique [0002] Facing the increasingly congested situation in cities, the subway has become the first choice to solve the traffic congestion problem in big cities because of its advantages of large transportation volume, high transportation efficiency and low environmental pollution. Urban subway tunnels are generally buried shallowly, and the lines often pass through densely populated areas such as pile foundations of superstructures and underground pipelines. Tunnel construction will cause tunnel vault settlement and bottom uplift. The soil settlement caused by tunnel excavation is mainly concentrated in the upper area of the tunnel. The settlement value at the tunnel vault is the largest...
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