城市下穿长隧道工程设计

结合工作实践，探讨了城市下穿长隧道工程的设计要点，分别介绍了隧道结构形式、建筑限界、防排水、通风及埋深等内容，以期为同类工程设计提供指导。     

基坑支护结构中土钉长度和布置形式的优化

针对土钉长度及其布置形式作为土钉支护中的热点问题,阐述了土钉结构形式具有支护效果好、价格低廉的优点,基于土钉长度对基坑边坡整体稳定性的影响,分析了土钉不同布置形式对其设计长度的影响,从而达到土钉设计的优化.     

水电站导流洞布置优化设计

随着我国经济的快速发展,我国的水电行业得到了飞速的发展。水电站是水电行业发展最为重要的基础设施,对其进行优化设计是非常重要的。某水电站是我国建设最为重要的水电设施之一,工程规模比较大。水电站初期设计有6条导流洞,进口闸室采用的是岸塔式结构。但是导流洞的洞线比较长,截流之前需要消耗较大的工程量,并且在进行导流洞施工时会和其他施工相互影响。所以为了确保工程能够按照要求完成,本文主要对水电站导流洞布置进行优化设计,希望能够对相关人士有所帮助。     

特长公路隧道施工通风设计

以某特长隧道通风设计为例,根据隧道的特点和实际情况,选取了合理的通风方式,并对通风设计及计算、通风布置作了深入探讨,以保证施工进度,降低工程成本,取得满意的通风效果。     

谈长输管道中输油站场的总图设计

以石油天然气行业中长输管道中输油站场的总图设计为研究对象,结合具体工程实例,对如何结合当地规划进行合理的站址选择及如何合理布局、减少占地、减少工程投资进行了一些探讨,以保证输油管道工程的安全性和经济性。     

地铁区间隧道的地质条件评估及初期支护设计

基于所建项目的围岩特征条件,运用有限元手段对开挖各阶段的力学、位移特征做了详尽分析,指出了针对该项目的合理支护方式,旨在为类似项目的开挖、支护提供借鉴。     

长距离引水隧洞TBM施工方案设计

隧道掘进机在国内长隧道引水工程中应用广泛。其中敞开式TBM因其施工安全、高效、快速以及自动化程度高等优点,成为隧道施工的首选。以新疆北疆某引水隧道为研究背景,详细介绍敞开式TBM掘进施工工艺特点及隧道一洞双机的施工方案。该工程2台TBM在后续的掘进过程中,均表现出安全、高效、快速的开挖状态,为国内同类工程提供了参考。     

油气长输管线隧道穿越设计探析

通过具体工程实例,介绍了油气长输管线隧道穿越设计,包括纵断面布置、宽度、高度、管线敷设及隧道支护等多个方面,以确保工程安全的前提下,优化方案,完善施工图设计。     

压入式隧道通风技术在长大隧道施工中的应用

通过分析隧道内的有毒有害气体,提出了压入式隧道通风技术,并从风机安装、风管安装、通风管理等方面,阐述了压入式隧道通风施工技术要点,有效改善了隧道开挖与喷射混凝土时的施工环境。     

Numerical simulation of rock deformation for support design in tunnel intersection area

Passenger and vehicle adits and ventilation shafts are commonly used for emergency access and ventilation in long tunnels. Increasing support load and additional tunnel deformation may endanger tunnel stability during construction in the intersection of the access and main tunnels. To understand the mechanical behavior of rock masses in the intersection area, 75 cases of 3D numerical analysis were conducted. These analyses were conducted under various tunneling conditions including rock strength, rock mass rating, overburden depth, and intersection angle. Following analysis results, a criterion for assessing the effect of intersection angles on tunnel behavior has been established, and three categories of support design suggestions for different geological conditions have also been proposed.     

卵砾石层浅埋公路隧道支护方案的优化研究

某公路隧道位于特殊残坡积卵砾石层斜坡之中,是一典型的大跨浅埋扁平公路隧道,其支护结构和施工方案的设计直接影响到隧道的安全性和经济性.采用弹塑性非线性有限元模拟分析了该隧道的开挖和支护全过程.引入释放系数模拟开挖围岩应力释放时空效应,以最能直观反映开挖围岩松动变形情况的拱顶下沉量为主要控制目标,对初期支护的施作时机进行优化研究,利用得到的最优施作时机进行初支厚度的优化分析,并对二衬设计的合理性进行评价.提出卵砾石层斜坡中浅埋大跨扁平公路隧道支护设计和施工的优化方案.采用的考虑开挖过程的系统优化方法和研究成果可以为类似地质条件下隧道工程的设计与施工提供参考意见.     

长输管道工程水下隧道设计与涌水处理

结合西气东输二线黄河隧道、南干线东段长江隧道的设计与施工,针对石油天然气长输管道工程中水下隧道的特点,对施工中防止涌水的措施进行了探讨,为类似工程的设计与施工提供了宝贵经验。     

长大越江公路隧道组合通风设计分析

借鉴国外若干长大隧道通风系统的先进技术,通过CFD计算及理论分析,阐述了国内某长大越江公路隧道组合通风设计方法.     

Analysis of tunnel support design to withstand spalling induced by blasting

This paper presents modeling of rock spalling induced by a dynamic pulse using the finite-discrete element method, for the purpose of tunnel support design to withstand blasting. 1D and 2D model results are compared to analytical spalling equations and field test findings. It was found that only the 2D models are suitable for support design. A distinction between heavy spalling and light rockfall is made based on an estimation of the ratio of the peak stress of the arriving wave to the rock tensile strength. Accordingly, different design approaches are suggested: for heavy spalling a low impedance isolating layer between the tunnel liner and surrounding rock is recommended. For light rockfall, a simplified static FEM analysis procedure is presented.     

隧道支护结构体系协同优化设计方法及其应用

隧道支护结构体系的设计方法是隧道围岩稳定性控制的基本需求,如何确定合理的支护参数是保证隧道施工安全的关键问题.为此,首先将协同学原理引入隧道支护设计,构建了隧道围岩协同支护系统,阐明了其系统组成、研究层次及表征参数;隧道围岩协同支护的核心为充分发挥支护—围岩系统、构件和要素的工作性能,从而产生协同增强效应,其特点为时机...     

喷锚支护在老道沟隧道中的应用

结合河南嵩县洛卢公路老道沟隧道工程实例，阐述了喷锚支护在老道沟隧道施工中的应用，介绍了喷射混凝土的特点、材料组成及配比、施工工艺，以供类似工程参考借鉴。     

Analytical computation of support characteristic curve for circumferential yielding lining in tunnel design

Circumferential yielding lining is able to tolerate controlled displacements without failure,which has been proven to be an effective solution to large deformation problem in squeezing tunnels.However,up to now,there has not been a well-established design method for it.This paper aims to present a detailed analytical computation of support characteristic curve(SCC)for circumferential yielding lining,which is a significant aspect of the implementation of convergence-confinement method(CCM)in tunnel support design.Circumferential yielding lining consists of segmental shotcrete linings and highly deformable elements,and its superior performance mainly depends on the mechanical characteristic of highly deformable element.The deformation behavior of highly deformable element is firstly investigated.Its whole deforming process can be divided into three stages including elastic,yielding and compaction stages.Especially in the compaction stage of highly deformable element,a nonlinear stress-strain relationship can be observed.For mathematical convenience,the stress-strain curve in this period is processed as several linear sub-curves.Then,the reasons for closure of circumferential yielding lining in different stages are explained,and the corresponding accurate equations required for constructing the SCC are provided.Furthermore,this paper carries out two case studies illustrating the application of all equations needed to construct the SCC for circumferential yielding lining,where the reliability and feasibility of theoretical derivation are also well verified.Finally,this paper discusses the sensitivity of sub-division in element compaction stage and the influence of element length on SCC.The outcome of this paper could be used in the design of proper circumferential yielding lining.     

GPS在长隧道的洞外测量

为了保证隧道正确贯通衔接,结合具体工程,利用GPS星球定位系统对塔山隧道段进行了贯通复测,详细介绍了GPS的外业作业流程,探讨了GPS的数据处理,并对其观测成果进行了分析,通过GPS测量与普通导线测量的比较,指出GPS测量的精度高、使用方便.     

浅谈高速公路隧道开挖支护技术

结合皖南山区高速公路隧道建设情况，针对分离式隧道和双连拱隧道的特点，介绍了围岩的分类方法与高速公路隧道在不同围岩类型下的开挖方法及其支护技术，为类似隧道的开挖支护提供一定的参考。