Design method of extruded surrounding rock tunnel structure

A technology of tunnel structure and design method, applied in the direction of tunnel, tunnel lining, design optimization/simulation, etc., can solve problems such as complex calculation process, inapplicability, uncertainty, etc.

A technology of tunnel structure and design method, applied in the direction of tunnel, tunnel lining, design optimization/simulation, etc., can solve problems such as complex calculation process, inapplicability, uncertainty, etc.

CN111027129AActive Publication Date: 2020-04-17SHIJIAZHUANG TIEDAO UNIV +1
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  • Design method of extruded surrounding rock tunnel structure
  • Design method of extruded surrounding rock tunnel structure
  • Design method of extruded surrounding rock tunnel structure

Examples

Experimental program
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Embodiment

[0136] like Figure 5 As shown in the figure, a tunnel with extruded surrounding rock is a double-track railway tunnel, and the designed excavation span is B t = 14.0m, tunnel burial depth H = 550m, surrounding rock strength stress ratio R cm / P 0 = 0.16 (the predicted deformation level is 2), then x = 0.16, y = 1.394, and A(0.16, 1.394) is obtained, corresponding to Figure 4 In practice, single-layer support is adopted, the thickness of spray layer is 35cm, H175@0.5m, the length of anchor rod is 6.5m, the thickness of secondary lining concrete is 65cm, and measures to optimize the curvature of the section are adopted; through the design method of the present invention, it can be Get the structural design diagram as Figure 5 shown.

[0137] Application inspection of the design method of the present invention:

[0138] The design method of the present invention passes through typical extruded surrounding rocks such as the Wushaoling Tunnel of the Lanxin Line 2, the Guanj...

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Abstract

The invention discloses a design method of an extruded surrounding rock tunnel structure. The design method comprises the following steps: determining key influence factors for designing the extrudedsurrounding rock tunnel structure as a surrounding rock strength-stress ratio, a tunnel excavation span and a tunnel burial depth; establishing a coordinate system by taking the surrounding rock strength-stress ratio as an abscissa and a function of the tunnel excavation span and the tunnel burial depth as an ordinate, and determining a value range of the abscissa and the ordinate; taking the structure load value as the basis of the design partition, and determining the structure load value range, the characteristic value, the number of the design partitions and the boundary position based onthe value ranges of the horizontal coordinate and the vertical coordinate; determining structure design parameters, section curvature optimization measures and auxiliary structure measures of each design subarea; and completing the extruded surrounding rock tunnel structure design chart. The method provided by the invention can quickly determine support lining parameters and auxiliary structure measures, and has the advantages of intuition, simplicity, quickness and accuracy.

Description

technical field [0001] The invention relates to the technical field of tunnel design, in particular to a design method for a tunnel structure with extruded surrounding rock. Background technique [0002] At present, the tunnels constructed by the mining method mostly adopt the composite lining structure. The composite lining structure is composed of the initial support, the secondary lining and the waterproof layer laid between them. Among them, the initial support is composed of bolts, shotcrete, steel arches, steel mesh and other support forms and one or more combinations, also known as bolt-and-shot support; the secondary lining is cast-in-place concrete or RC. [0003] At present, in the design method of tunnel composite lining structure, there is no effective design method and calculation method for composite lining structure considering both primary support and secondary lining. Generally, primary support and secondary lining are considered separately. The initial su...

Claims

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Application Information

Patent Timeline
17 Apr 2020
Publication
CN111027129A
IPC
G06F30/13; G06F30/20; E21D11/10; G06F119/14
CPC
E21D11/10
Inventors
刘志春; 李国良