山岭隧道的封堵设计与施工

对于各种特殊原因造成的某些废弃的油气管道隧道,必须采取环保、安全、可靠的封堵方法进行处理,避免产生次生灾害。针对不同地质和水文条件下的隧道,可采用混凝土封堵墙、注浆堵水、挂网锚喷混凝土、局部钢支架加固等方法进行有效封堵。通过对四川某地一条天然气管道隧道进行封堵设计和施工情况分析介绍,研究探讨了隧道封堵的处理措施和适用方式。目前,该隧道封堵效果良好,为管道隧道的封堵设计和施工提供一定的参考。     

复杂地形下人工挖孔灌注桩施工工艺研究

从传统人工挖孔灌注桩施工工艺角度入手，结合工程地质条件的复杂因素和现场环境恶劣的情况，对作业条件、施工技术可行性、环境制约因素，进行了深度技术分析，提出了经济的施工方案，采用新技术和自制简易机具，有效地解决了施工中的难题。     

玲珑金矿255巷道注浆加固技术

巷道的塌陷破坏是矿山中常见问题之一,不同的地质情况下,采用的治理方法也各不相同。本文分析了玲珑金矿255巷道塌陷机理,采用“拱桥法”注浆加固技术,通过合理选择注浆压力等工艺参数、对注浆加固过程进行优化控制,使玲珑金矿255新、旧巷道治理后已经恢复生产。实践证明,拱桥法注浆加固技术是一种行之有效的巷道加固方法。     

万家寨引黄工程有压输水隧洞裂缝及处理

文中论述了万家寨引黄工程南干一级，二级泵站出水洞混凝土裂缝出现情况。裂缝出现原因分析及缺陷处理方法。     

香炉山引水隧洞围岩的蠕变特性及模型研究

为了探究滇中引水隧洞围岩的蠕变特性,采用实时高温常规三轴试验系统开展岩石的力学性能和蠕变试验。在建立岩石蠕变本构模型的基础上,根据蠕变试验曲线的特点,提出了一种确定蠕变参数的方法,并分析了不同应力水平下蠕变参数的变化规律,构建了蠕变参数与应力的关系。最后将各蠕变参数与应力之间的表达式代入蠕变本构模型中,得到修正的蠕变本构模型。结果表明：建立的蠕变模型不仅准确反映了衰减和稳定蠕变阶段的蠕变特征,而且克服了传统模型难以描述加速蠕变的缺点。同时,该方法确定的蠕变参数不仅可以反映应力对蠕变参数的影响,还可有效反映应力状态对蠕变变形规律的影响。     

引汉济渭秦岭隧洞5号支洞岩爆微震响应研究

以引汉济渭秦岭输水隧洞5号支洞为研究对象,微震监测技术为手段,微震数据及岩爆实录资料为基础,分析了诱发岩爆的原因,并在此基础上探究了微震事件活动与岩爆的关系。研究结果表明：地应力和掘进速率是诱发岩爆产生的主要影响因素,且埋深不同,其对岩爆产生的影响程度不同;微震事件的空间分布特征与掌子面位置存在紧密联系,其“时、空、强”特征可以形象地演示岩爆的产生过程并用于对岩爆的预测预警;岩爆不会一直持续发生,而是会经历扰动开挖-裂隙产生-岩体储能-裂纹发育贯通-能量释放的过程,且当能量释放不彻底时,容易形成频发型岩爆。     

Modelling and optimization of the firing zone of a tunnel kiln to predict the optimal feed locations and mass fluxes of the fuel and secondary air

Optimization of the firing zone was done to minimize the fuel cost as being the objective function by finding the optimal operating variables. These variables are the initial admixed coal (AC) in the brick body, the mass flux and locations of pulverized coal (PC) and the secondary air required for complete combustion. The constraints are the carbon coming from the AC which increases the porosity of the bricks, and should be consumed completely. Two other constraints to avoid thermal shock are the temperature difference between bricks and air, and the maximum heating rate of the bricks. The results were compared to the plant data.     

Mechanical analysis of circular liners with particular reference to composite supports. For example, liners consisting of shotcrete and steel sets

This paper describes a methodology for the mechanical analysis of composite supports, such as liners consisting of shotcrete and steel sets. The methodology presented here is based on an established technique of structural analysis commonly referred to as the ‘equivalent section’ approach. This technique consists in treating the composite section of a straight beam as a homogenized section of equivalent mechanical properties. The equations presented in this paper have been derived from application of the theory of elastic shells (or curved beams) and therefore are more appropriate for the analysis of circular tunnel liners. The proposed methodology for the design of liners is based on the construction of capacity diagrams, another established technique of structural analysis and concrete design that can be conveniently extended to the analysis of composite sections for tunnel liners. When applying the theory of elastic shells to derive the equations that conform to the proposed methodology, the problem of determining the mechanical response of semi-circular arches treated with the theory of thin and thick formulations has been re-visited. Observations of practical interest arising from the comparison of results obtained with both approaches are discussed.     

上海市长江隧道工程洞门中心坐标精确测定

根据上海市长江隧道工程贯通处洞门中心坐标测量的卖际情况，利用数学方法将空间三维的洞门钢环实测坐标拟合出三维方程，精确求取钢环中心的三维坐标。     

遗传算法在双圆隧道工程智能咨询系统DT_DSS中的应用

DT_DSS是一个利用多种数据计算模型对现有施工数据进行分析,根据分析结果指导后期施工的智能咨询系统.遗传算法是DT_DSS中众多数据计算模型当中的一种,它主要用于实现预测和控制地面沉降及设计轴线的作用,从而保证后期施工的安全.本文介绍了遗传算法的基本知识,并详细分析它在双圆隧道工程智能咨询系统DT_DSS中的设计实现与应用.