Method for designing section parameters of single-hole four-lane highway tunnel

A technology of cross-section parameters and design methods, which is applied in the field of highway engineering and tunnel engineering, can solve the problems of less engineering experience and increasing demand for highway tunnel construction, and achieve the effect of ensuring safety and economy

Pending Publication Date: 2020-08-04
CHANGAN UNIV
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Problems solved by technology

[0003] At present, the construction of single-hole four-lane road tunnels in China is in its infancy, and there is little relevant engineering experience. However, the current road tunnel design codes only provide the cross-sectional forms and parameters of single-hole two-lane road tunnels and single-hole three-lane road tunnels. There is no single-hole four-lane road tunnel section form and parameters for reference. With the development of highway traffic in my country, the construction demand for single-hole four-lane road tunnels is increasing. A design method for section parameters of a single-hole four-lane highway tunnel that can meet the economical requirements of the project

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  • Method for designing section parameters of single-hole four-lane highway tunnel
  • Method for designing section parameters of single-hole four-lane highway tunnel
  • Method for designing section parameters of single-hole four-lane highway tunnel

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Embodiment 1

[0098] According to the "Code for Design of Highway Tunnels" (JTG 3370.1-2018), conservative considerations, the vertical surrounding rock pressure of a single-hole four-lane tunnel is calculated according to the surrounding rock of level V, and the vertical uniform pressure is determined by the formula for calculating the vertical uniform pressure of loose loads in deep tunnels , namely q=0.45×2 S-1 ω·γ. The grade of surrounding rock is Ⅴ, that is, S is taken as 5; the weight of surrounding rock γ is taken as 17kN / m 3 ; Considering that the construction process is divided into pilot tunnel excavation, taking the surrounding rock pressure increase and decrease rate i as 0.07, and taking the excavation span B as 22m, according to ω=1+i(B-5), the width influence coefficient ω is 2.19, calculated Surrounding rock pressure is 268kN / m 2 , and considering that the load sharing ratio of the secondary lining is 65%, the vertical uniform pressure q applied to the model is finally tak...

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Abstract

The invention discloses a method for designing section parameters of a single-hole four-lane tunnel. The method comprises the steps of determination of surrounding rock pressure, establishment of a numerical model under different flatness ratio conditions, calculation of lining structure internal force, calculation of lining structure safety coefficients, contrastive analysis of sections with different flatness ratios, solving of a reasonable section form and the like. The invention provides a single-hole four-lane highway tunnel section form considering both safety and economy and aiming at different design vehicle speeds. The problem that no single-hole four-lane highway tunnel section form exists in existing highway tunnel design specifications is solved. A basis can be provided for formulation of design specifications and standards of the single-hole four-lane highway tunnel in China, a reference basis can be provided for design of the section of the newly-built or rebuilt single-hole four-lane highway tunnel in China, and safety and economy of the section form of the single-hole four-lane highway tunnel are guaranteed.

Description

technical field [0001] The invention belongs to the technical fields of highway engineering and tunnel engineering, and in particular relates to a method for designing section parameters of a single-hole four-lane highway tunnel. Background technique [0002] The rapid development of the national economy has brought about a substantial increase in the traffic volume of expressways. Two-way four-lane or six-lane expressways can no longer meet the needs of transportation. It is imperative to develop two-way eight-lane expressways. In the newly built or expanded two-way eight-lane expressway projects, a large number of double-hole eight-lane (that is, single-hole four-lane) highway tunnels have emerged as the times require. A single-hole four-lane road tunnel refers to a road tunnel with four lanes in a single cavern. Different from a single-hole two-lane and three-lane road tunnel, a single-hole four-lane road tunnel not only increases the excavation span, but also increases t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/23G06F30/13E21D9/14E21D11/00G06F111/10G06F119/14
CPCG06F30/23G06F30/13E21D9/14E21D11/00G06F2111/10G06F2119/14
Inventor 罗彦斌董方方陈建勋王传武钟道川田超鹏
Owner CHANGAN UNIV
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