预铺式PEB(S)反应性丁基橡胶自粘防水卷材在矿山法隧道中的应用

岩体隧道大多采用矿山法施工,结构防水一般采用塑料防水板作为主防水层。分析了不同防水材料施工工艺的优缺点,详细介绍了预铺型防水卷材在矿山法隧道二衬间施工应用的工艺特点。新工艺可适应现有矿山法隧道施工现状,提升整体防水效果。     

泥质粉砂岩地层中后行盾构隧道近接施工对大断面矿山法隧道的影响研究

两条以上隧道近距离施工时,将导致既有隧道与新建隧道结构的受力变化,带来工法、工序与施工对策优化等问题。文章以长沙轨道交通3号线盾构隧道近接大断面矿山法隧道施工为工程依托,针对泥质粉砂岩地层,采用数值模拟和模型试验的手段,研究盾构隧道近接矿山法隧道施工的影响规律,并基于地表沉降准则提出影响分区。研究表明:盾构法隧道施工中,盾构开挖距离研究断面1倍洞径至研究断面完成管片拼装这一过程,是引起对应地表沉降增加及既有矿山法结构附加位移增长的主要阶段;对矿山法隧道结构的影响以竖向附加变形为主,具体表现为矿山法隧道整体上浮,越靠近盾构隧道的结构受影响越大;内力影响表现为矿山法隧道结构内力不均匀变化,靠近盾构隧道一侧结构受压加强,远离盾构隧道一侧结构易发生受拉破坏。     

盾构通过矿山法施工隧道段关键技术

盾构通过矿山法隧道段在盾构工法中施工难度最大,尤其是在始发阶段施工技术要求更高.文章以广州地铁五号线区杨盾构区间盾构通过40 m长的矿山法隧道为例,介绍了盾构通过矿山法隧道的施工关键技术及其成功经验,对今后类似工程施工具有一定的指导意义.     

广州地铁矿山法施工的质量控制重点

在城市地铁暗挖隧道矿山法施工中,如何控制工程质量,确保隧道施工及其周围环境的安全,目前尚存在一定的难度.文章根据笔者从业主的角度,结合广州地铁一、二号线矿山法隧道工程中所遇到的问题,阐明了矿山法施工中的控制要点.     

复合地层中的暗挖隧道施工

广东地区地层复杂多样,地质均匀性差。通常情况下,建设隧道采用的是矿山法与盾构法并存的工法。结合深圳地铁2号线东角头站一湾厦站区间隧道的设计和施工,介绍一些在复合地层中实施暗挖隧道的方法及相关经验。     

矿山法隧道道床隆起病害治理施工方法

雨水以及渗漏水通过岩层面及裂隙渗入到矿山法隧道周边,当地下水压力超出了隧道的极限承载能力时,将致使隧道结构发生破坏。结合南京轨交某矿山法隧道道床隆起病害,详细介绍了打设泄压孔、锚杆加固处理、道床环氧树脂加固3项治理方案,并对整治效果进行了分析,可供类似工程的修复加固参考和借鉴。     

矿山法施工地铁隧道时控制地表沉降、地下管线沉降的施工技术

城市地铁隧道一般为浅埋,它与山岭隧道相比,主要区别是要考虑隧道施工对周边环境的影响.文章以广州地铁二～三号线客村联络线工程为例,初步总结了城市地铁隧道采用矿山法施工时,控制地表和地下管线沉降的经验,可供类似工程施工时参考.     

隧道围岩钻爆施工技术

某隧道穿越地层以中~微风化岩石为主,围岩多为硬质岩,饱和单轴抗压强度最大为86.3MPa,适宜采用矿山(钻爆)法施工。鉴于此,系统地介绍了该隧道所采取的钻爆施工技术。在隧道开挖施工时采取减振开挖方案,有效地确保了工程钻爆安全性。     

富水砂质地层的地铁区间隧道设计

深圳地铁2号线东延段安托山站—侨香站区间隧道顺利通过富水砂质地层的工程实例表明,在复杂地层中采用地面降水、超前预注浆及水平旋喷桩加固等辅助措施是成功的,也是必要的;另外,在隧道下穿次高压燃气管施工中,采用悬吊保护措施也为矿山法隧道施工和管线的绝对安全带来了技术保障。     

小断面长陡斜坡隧道短导洞光面爆破技术研究

在工业及矿业工程施工中,矿山隧道因其断面形式非标化,断面尺寸较小,操作空间受限导致其机械化施工程度低,且隧道长陡斜坡的存在使其在"钻爆法"施工过程中极易出现爆破塌孔及冒顶现象,以致增加施工成本,拖延施工工期.为此基于"钻爆法"施工原理,采用隧道掌子面短导洞掏槽爆破技术,并结合掌子面爆破参数及炮眼布设的优化设计,通过电力...     

单拱单柱双层新型结构形式在蒲黄榆地铁车站中的应用

北京地铁五号线蒲黄榆车站成功地采用了暗挖法施工方案和单柱单拱双层结构形式,实践证明,这种施工方法和结构形式是安全、可行的。文章介绍了施工方案和结构形式的选定、施工过程的模拟分析,以及结构设计计算结果等,并提出了问题和建议。     

北京地铁浅埋暗挖施工坍塌的预防与处理

文章根据北京地质环境状况,介绍浅埋暗挖施工坍塌的预防及处理措施。     

北京地铁和平西桥站-北土城东路站区间渡线区隧道暗挖施工技术

文章主要介绍了北京地铁五号线和-北区间渡线区暗挖隧道断面转换施工技术,其经验可为今后类似城市地铁工程施工提供借鉴。     

地铁渡线地段大断面浅埋暗挖综合施工技术研究

文章结合北京地铁5号线和平西站至北土城东路站区间隧道施工实践,对地铁渡线地段浅埋、大跨、变断面隧道暗挖施工技术进行了分析,在从小断面向大断面施工、大断面向小断面施工以及双连拱地段等的施工技术方面提出了新的思路。     

Traffic and emissions impact of congestion charging in the central Beijing urban area: A simulation analysis

Congestion charging is being considered as a potential measure to address the issue of substantially increased traffic congestion and vehicle emissions in Beijing. This study assessed the impact of congestion charging on traffic and emissions in Beijing using macroscopic traffic simulation and vehicle emissions calculation. Multiple testing scenarios were developed with assumptions in different charging zone sizes, public transit service levels and charging methods. Our analysis results showed that congestion charging in Beijing may increase public transit use by approximately 13%, potentially reduce CO and HC emissions by 60–70%, and reduce NOx emissions by 35–45% within the charging zone. However, congestion charging may also result in increased travel activities and emissions outside of the charging zone and a slight increase in emissions for the entire urban area. The size of charging zone, charging method, and charging rate are key factors that directly influence the impact of congestion charging; improved public transit service needs to be considered as a complementary approach with congestion charging. This study is used by Beijing Transportation Environment and Energy Center (BTEC) as reference to support the development of Beijing’s congestion charging policy and regulation.     

Does the increase of public transit fares deteriorate air quality in Beijing?

Since 2006, Beijing lowered its public transit fares as a way to improve air quality. However, Beijing increased public transportation fare prices from December 28, 2014, and commuters pay for the distance they traveled rather than a flat fare. This paper explores the effect of Beijing public transit fares increase on air quality. We collect daily data of air pollution and weather variables and use synthetic control method of Abadie and Gardeazabal (2003) to select control units. We then estimate a difference-in-differences model and assess the effect of the policy on air quality index (AQI). We find a 16.28% increase in air pollution in short run. However, we find no longer-run effect on air quality.     

引进装配式铺盖法修建地铁车站

针对城市地铁车站建设过程中对道路交通影响的问题,介绍了一种对路面交通影响较小的施工方法——装配式铺盖法,并对其五大特点作了分析。结合北京地铁9号线工程实施该项技术的实例,提出了推广装配式铺盖法的建议和设想。     

Comprehensive Evaluation of the Intelligent Degree of the Mining Face Based on Grey Relational Analysis北大核心CSCD

In order to further evaluate the intelligent degree of the coal mining face scientifically and reasonably, this paper constructs a gray relational analysis based comprehensive evaluation model for the intelligent degree of mining face by deeply analyzing the influencing factors on the intelligent degree of mining face, such as surrounding rock detection, mining equipment, production system, supporting production system, organization and management, etc. By quantifying and scoring factors affecting the intelligence degree of mining face, using the hierarchical analysis method to obtain the weights and determine the correlations, the intelligence degrees of mining face are classified into four levels: excellent, good, medium and poor. Using the comprehensive evaluation model to empirically verify the 802 working face of Shaanxi Huangling Mining Co., Ltd., the calculated correlation is 0.765 8, which indicates that the intelligent degree of 802 working face is excellent according to the rating criteria, and it is consistent with the actual situation. Therefore, the comprehensive evaluation model based on gray relational analysis can accurately and objectively evaluate the intelligent degree of the mining face. © 2022, Editorial Office of "Modern Tunnelling Technology". All right reserved.     

城市道路交通噪声污染经济损失及评估

文章应用市场估值法、享乐价格法和意愿调查价值评估法对城市道路交通噪声经济损失的货币化进行分析,并以北京市为例,计算评估了城市道路交通噪声带来的经济损失。     

高速公路建设环保监管系统的设计与实现

目前国家对建设项目环境保护的要求越来越高,高速公路建设期的环保管理也包含在其中。针对高速公路建设的特点,一个新的环保监管系统被设计出来用以提高高速公路建设期的环保管理工作效率。该系统能够帮助高速公路建设中的施工方、监理方和项目公司相关人员围绕日常环保施工内容进行环保管理和监督工作,保证各自环保工作的有效进行。相比传统管理方式,利用该系统管理具备实时监管、规范化环保工作内容、环保行业专业辅助等优势。系统开发完成后,在江津至习水高速公路(江习高速)重庆段进行实际应用,取得良好的效果,具有一定推广前景。