期刊文献+
共找到311篇文章
< 1 2 16 >
每页显示 20 50 100
Prevention and treatment technologies of railway tunnel water inrush and mud gushing in China 被引量:19
1
作者 Yong Zhao Pengfei Li Siming Tian 《Journal of Rock Mechanics and Geotechnical Engineering》 SCIE CSCD 2013年第6期468-477,共10页
Water inrush and mud gushing are one of the biggest hazards in tunnel construction. Unfavorable geological sections can be observed in almost all railway tunnels under construction or to be constructed, and vary in ex... Water inrush and mud gushing are one of the biggest hazards in tunnel construction. Unfavorable geological sections can be observed in almost all railway tunnels under construction or to be constructed, and vary in extent. Furthermore, due to the different heights of mountains and the lengths of tunnels, the locations of the unfavorable geological sections cannot be fully determined before construction, which increases the risk of water inrush and mud gushing. Based on numerous cases of water inrush and mud gushing in railway tunnels, the paper tries to classify water inrush and mud gushing in railway tunnels in view of the conditions of the surrounding rocks and meteorological factors associated with tunnel excavation. In addition, the causes of water inrush and mud gushing in combination of macroand micromechanisms are summarized, and site-specifc treatment method is put forward. The treatment methods include choosing a method of advance geological forecast according to risk degrees of different sections in the tunnel, determining the items of predictions, and choosing the appropriate methods, i.e. draining-oriented method, blocking-oriented method or draining-and-blocking method. The treatment technologies of railway water inrush and mud gushing are also summarized, including energy relief and pressure relief technology, advance grouting technology, and advance jet grouting technology associated with their key technical features and applicable conditions. The results in terms of treatment methods can provide reference to the prevention and treatment of tunnel water inrush and mud gushing. 展开更多
关键词 Tunnel engineering Unfavorable geological regions water inrush and mud gushing Pressure relief technology Advance grouting technology Advance jet grouting
下载PDF
Formation mechanisms of water inrush and mud burst in a migmatite tunnel:a case study in China 被引量:5
2
作者 WU Guo-jun CHEN Wei-zhong +2 位作者 YUAN Jing-qiang YANG Dian-sen BIAN Han-bian 《Journal of Mountain Science》 SCIE CSCD 2017年第1期188-195,共8页
This paper presents a case study of water inrush and mud burst occurring in a migmatite tunnel to study its formation mechanisms. The geological investigation and mineralogical analysis showed that water inrush and mu... This paper presents a case study of water inrush and mud burst occurring in a migmatite tunnel to study its formation mechanisms. The geological investigation and mineralogical analysis showed that water inrush and mud burst in the migmatite was closely related to the component of the host rock. High content of soluble minerals,e.g.,calcite and dolomite,would make the migmatite rock prone to be fragmentized,isintegrated and eventually form different sorts of connected or semi-connected veins. The field exploration revealed most cavities in the magmatite tunnel were eroded by groundwater and formed large interconnected networks. The two faults and the dike in the magmatite tunnel became the preferred paths and provided great convenience for plenty of precipitation and mud slurry. Due to high water pressure and blast disturbance,the cavities can soon connect each other as well as all sorts of veins,forming a complex ground channel for water inrush and mud burst. To estimate the potential occurrenceof water inrush and mud burst,the water bursting coefficient was employed. The results showed the water bursting coefficient of the magmatite tunnel was much bigger than the threshold values and it can be used to explain the accident of water inrush and mud burst occurring in the magmatite tunnel. 展开更多
关键词 water inrush mud burst Migmatite Formation mechanism Tunnel
下载PDF
Structural mechanism and construction method of mud and water inrush in Xiangyun tunnel of Guangtong-Dali railway
3
作者 WANG Yawei 《Global Geology》 2019年第3期167-178,共12页
Mud and water inrush in tunnel is a common problem in the construction process. Nowadays, the research and classification on this are mostly focused on karst situations. According to the characteristics of the surroun... Mud and water inrush in tunnel is a common problem in the construction process. Nowadays, the research and classification on this are mostly focused on karst situations. According to the characteristics of the surrounding rock and damage forms of the tunnel in the studied area, the author analyzed the geological and structural characteristics of mud and water inrush in tunnel and obtained their construction type. Meanwhile, the advanced water detection under the complex geological conditions was studied by using induced polarization method, transient electromagnetic method and three-dimensional seismic method, it can be concluded that the water-rich fracture zone exists within the detection range with a risk of large mud and water inrush disaster. The concrete construction treatment measures are put forward:①cement-water glass binary slurry is selected as the material for ground and hole grouting, its advantage is that the gel time can be controlled, and it has certain grout ability in the strata with large permeability coeffcient, which is conducive to excavate construction immediately after grouting.②applying the mature retrograde grouting construction can reduce grouting time and improve the excavation efficiency. 展开更多
关键词 mud and water inrush geological model Xiangyun TUNNEL Guangtong-Dali RAILWAY STRUCTURAL mechanism construction method
下载PDF
Treatment Design and Construction Strategy for Tunnel Mud and Water Inrush Disaster
4
作者 Yike Wei Lingfeng Yu 《Journal of Architectural Research and Development》 2021年第2期52-54,共3页
With the rapid development of the transportation industry in China,the number and scale of tunnel construction are increasing.Tunneling through fault zones and other complex geological environments is becoming more an... With the rapid development of the transportation industry in China,the number and scale of tunnel construction are increasing.Tunneling through fault zones and other complex geological environments is becoming more and more common.In the construction of highway tunnels,due to the special geographical environment and complex geological conditions,mud and water inrush often occur in the tunnel.Water inrush disasters pose a major risk to the construction of highway tunnels and affect the normal construction of highway tunnels.This paper combines the engineering background of the tunnel mud and water inrush accidents,carries out evaluation on the accident treatment measures and the treatment efficiency,and summarizes the main concerns in the construction process and the technical guidelines for dealing with the tunnel mud and water inrush. 展开更多
关键词 TUNNEL mud and water inrush Disaster treatment Construction strategy
下载PDF
Catastrophe theory-based risk evaluation model for water and mud inrush and its application in karst tunnels 被引量:18
5
作者 ZHU Jian-qun LI Tian-zheng 《Journal of Central South University》 SCIE EI CAS CSCD 2020年第5期1587-1598,共12页
This paper presents a risk evaluation model of water and mud inrush for tunnel excavation in karst areas.The factors affecting the probabilities of water and mud inrush in karst tunnels are investigated to define the ... This paper presents a risk evaluation model of water and mud inrush for tunnel excavation in karst areas.The factors affecting the probabilities of water and mud inrush in karst tunnels are investigated to define the dangerousness of this geological disaster.The losses that are caused by water and mud inrush are taken into consideration to account for its harmfulness.Then a risk evaluation model based on the dangerousness-harmfulness evaluation indicator system is constructed,which is more convincing in comparison with the traditional methods.The catastrophe theory is used to evaluate the risk level of water and mud inrush and it has great advantage in handling problems involving discontinuous catastrophe processes.To validate the proposed approach,the Qiyueshan tunnel of Yichang-Wanzhou Railway is taken as an example in which four target segments are evaluated using the risk evaluation model.Finally,the evaluation results are compared with the excavation data,which shows that the risk levels predicted by the proposed approach are in good agreements with that observed in engineering.In conclusion,the catastrophe theory-based risk evaluation model is an efficient and effective approach for water and mud inrush in karst tunnels. 展开更多
关键词 risk evaluation model water and mud inrush catastrophe theory karst area TUNNELING
下载PDF
Optimizing Hydraulic and Chemical Properties of Iron and Aluminum Byproducts for Use in On-Farm Containment Structures for Phosphorus Removal 被引量:3
6
作者 Sheri L. Herron Andrew N. Sharpley +1 位作者 Kristofor R. Brye David M. Miller 《Journal of Environmental Protection》 2016年第12期1835-1849,共16页
Phosphorus (P) transported in runoff from broiler production areas is a potential source for nutrient enrichment of local surface waters. Capturing nutrients prior to runoff leaving the production area could reduce th... Phosphorus (P) transported in runoff from broiler production areas is a potential source for nutrient enrichment of local surface waters. Capturing nutrients prior to runoff leaving the production area could reduce the risk of transport. Commercially available systems for nitrogen (N) and P removal from stormwater are available but too expensive for widespread adoption on small, privately owned farms. The P adsorption capacities and hydraulic conductivities of locally-sourced iron red mud (RM) and aluminum water treatment residual (WT) were determined for potential on-farm treatment use. The byproducts were air-dried and separated into ≤2-, ≤6-, and ≤12.5-mm particle size fractions. Saturated hydraulic conductivity (HC) was determined for each particle-size fraction and results evaluated for the material’s ability to transmit a 25-year, 30-min rainfall of 6.6 cm. While the HC of ≤6-mm particles of each byproduct did not differ (p > 0.05;4.1 and 4.6 cm·min<sup>-1</sup>), for ≤12.5-mm particles it was greater (p > 0.05) for WT than RM (15.4 and 8.0 cm·min<sup>-1</sup>, respectively). However, all byproduct size fractions transmitted flow sufficiently to accommodate the baseline storm. Phosphorous adsorption maxima of ≤2-mm fraction for RM and WT were 25 and 10 g·P·kg<sup>-1</sup>, respectively. Using a solution containing 6 mg·P·L<sup>-1</sup>, rep-resenting the measured runoff-P concentration from areas adjacent to poultry house ventilation fans, the ≤2-mm fraction of RM removed 98% of added P and WT 84%. The ≤6-mm fraction of RM and WT removed 56% and 57% of added P, respectively, while the ≤12.5-mm fraction adsorbed only 28% and 10%. Results indicate the potential use of low-cost RM and WT byproducts to sequester P in runoff prior to P leaving poultry farm production areas. 展开更多
关键词 Phosphorus Runoff Poultry Production Red muds water Quality water treatment Residua
下载PDF
Nutrient Removal Structures Using Locally-Sourced Iron and Aluminum By-Products Reduce Nutrient Runoff from Broiler Production Facilities
7
作者 Sheri L. Herron Andrew N. Sharpley +1 位作者 Kristofor R. Brye James M. Burke 《Journal of Environmental Protection》 2020年第4期332-343,共12页
A common issue with filters designed to remove nutrients from runoff is their reduced effectiveness in high-flow conditions. To overcome this challenge, it was determined that nutrient removal from broiler-house fan d... A common issue with filters designed to remove nutrients from runoff is their reduced effectiveness in high-flow conditions. To overcome this challenge, it was determined that nutrient removal from broiler-house fan dust could be more effective if nutrient removal was conducted at the nutrient source. The objective of this study was to evaluate the effectiveness of containment trays (CTs) holding locally sourced by-products installed adjacent to broiler house fans at the University of Arkansas Savoy broiler production facility to capture nutrients released from dust during rainfall over four years (2013 to 2017). By-products used were locally sourced, iron-based red mud (RM) generated during the manufacture of steel belts for tires and alum-based drinking water treatment residual (WTR), where both materials have large phosphorus (P) sorption capacities. Four-year mean annual concentrations of dissolved P of through-flow from RM CTs were consistently below 0.7 mg·L-1 and below 1.6 mg·L-1 for WTR CT through-flow. This equated to an average 11- and 4-fold decrease for RM and WTR, relative to concentrations in runoff from same-sized plots adjacent to sidewall fans, demonstrating their potential to trap P at the source and decrease P runoff to nearby flowing waters. While there was no significant decline in RM or WTR effective-ness over the four-year study, further work needs to be conducted to determine the lifespan of CTs. Use of RM and WTR in CTs at poultry broiler production facilities, along with their subsequent land application, has the potential to reduce the amount of by-product materials that are currently landfilled. 展开更多
关键词 Nitrogen RUNofF Phosphorus RUNofF POULTRY Production Red mud water Quality water treatment Residual
下载PDF
陕西省煤矿典型水灾隐患特征及治理技术 被引量:4
8
作者 董书宁 樊敏 +5 位作者 郭小铭 刘英锋 郭康 姬中奎 李超峰 薛小渊 《煤炭学报》 EI CAS CSCD 北大核心 2024年第2期902-916,共15页
陕西省煤炭资源丰富,2022年煤炭产量达7.46亿t,是我国主要产煤省份之一。由于全省煤矿区地质及水文地质条件差异明显,煤矿水灾类型多样,随着近年煤炭开采强度的增大,水灾事故时有发生,防治水形势较为严峻。以煤炭赋存条件为基础,系统总... 陕西省煤炭资源丰富,2022年煤炭产量达7.46亿t,是我国主要产煤省份之一。由于全省煤矿区地质及水文地质条件差异明显,煤矿水灾类型多样,随着近年煤炭开采强度的增大,水灾事故时有发生,防治水形势较为严峻。以煤炭赋存条件为基础,系统总结区域水文地质结构特征,界定典型水灾类型及各类水灾影响区域分布,论述典型水灾的形成机理及特征,并提出了相应的防控技术。研究表明:(1)陕西省主要煤炭产区分为陕北、黄陇、渭北三大区,陕北侏罗纪煤田主要有顶板松散沙层水灾隐患、厚层砂岩水灾隐患、溃水溃沙灾害,局部区域分布有烧变岩对煤矿造成水灾隐患;黄陇煤田主要受顶板巨厚砂岩水灾隐患、离层溃水隐患、泥砂溃涌灾害隐患威胁;陕北石炭—二叠纪煤田和渭北煤田,主要受到煤层底板奥陶系灰岩水灾隐患威胁。(2)陕北侏罗系煤田顶板水灾隐患主要为顶板含水层受开采导水裂隙带扰动形成,导水裂隙波及砂岩含水层或松散沙层可形成持续大流量涌水,部分区域充水强度较大,在短时间水量较大超过排水系统能力时造成顶板水灾,在薄基岩区域垮落带直接导通松散沙层时可转变为溃水溃沙灾害,导水裂隙带影响到烧变岩富水区域时可形成瞬时水量大且持续的烧变岩水灾;黄陇煤田顶板巨厚砂岩含水层受采动导水裂隙带波及形成高强度持续涌水并可能形成顶板水灾,当含水层下部隔水层厚度较大时,可能形成离层溃水灾害,当近煤层顶板岩层松软遇水易崩解时可转变为泥砂溃涌灾害;陕北石炭—二叠纪煤田和渭北煤田,煤层开采底板扰动破坏带或断层等构造导通奥陶系灰岩含水层时,会引发极为严重的底板突水灾害,该类灾害具突发性强、瞬时水量大的特征。(3)各区域的顶板水灾隐患治理技术主要包括钻孔疏泄、注浆治理、开采参数控制等,底板水灾隐患治理技术主要包括区域注浆加固及封堵等;烧变岩水灾隐患主要采取帷幕注浆与钻孔探放有机结合的防治技术。 展开更多
关键词 陕西省煤矿 溃水溃沙 烧变岩水灾 离层溃水 泥砂溃涌 底板奥灰水灾
下载PDF
超深基坑岩溶超大突涌水封堵抢险治理技术
9
作者 古伟斌 蔺青涛 +2 位作者 郭佰良 钟国锋 薛炜 《施工技术(中英文)》 CAS 2024年第15期21-25,36,共6页
在岩溶地区开挖超深基坑,当岩溶埋深较小且地下水较丰富时,基坑易发生底部突水、涌泥、涌砂等险情,严重时可造成基坑坍塌,直接影响周边环境安全。在地质条件复杂、岩溶发育、突涌水量大且险情紧急的情况下,外围帷幕注浆结合内部突涌水... 在岩溶地区开挖超深基坑,当岩溶埋深较小且地下水较丰富时,基坑易发生底部突水、涌泥、涌砂等险情,严重时可造成基坑坍塌,直接影响周边环境安全。在地质条件复杂、岩溶发育、突涌水量大且险情紧急的情况下,外围帷幕注浆结合内部突涌水点反压封堵的常规封堵抢险方法见效慢、耗时久、成本高,突涌水无法快速封堵,险情无法快速排除。为此结合广州市综合交通枢纽地铁车站35m深基坑底部岩溶发生1000m3/h超大突涌水抢险工程,采用双液浆2层囊袋式内封堵注浆技术,在基坑内对突涌水点直接进行钻孔注浆封堵,利用囊袋保证双液浆可快速凝固,第1层囊袋封堵钻孔和涌水点,第2层囊袋封堵钻孔旁的岩溶孔洞、裂缝等,上下层囊袋互相补充,并对溶洞底进行双液注浆堵漏,防止浆液流失。工程实践表明,治理大涌水量、高水压的基坑岩溶突涌水时,双液浆2层囊袋式内封堵注浆技术具有易操作、直接、快捷、针对性强的特点,可实现快速有效注浆、快速抢险的目的。 展开更多
关键词 基坑 岩溶 突涌水 双液注浆 囊袋 封堵 治理
下载PDF
地下隧洞突水突泥演化过程模拟分析方法
10
作者 杜兴武 孔词 +5 位作者 肖明 詹双桥 陈运财 赵彬鑫 幸添 杨帛臻 《长江科学院院报》 CSCD 北大核心 2024年第10期157-164,共8页
在富水、高压、不良地质条件下,如何评估施工过程中的突水突泥破坏风险等级,是地下隧洞施工设计的难题。正确分析地下隧洞开挖应力与渗流耦合互馈作用,是合理模拟地下隧洞施工开挖突水突泥演化过程的关键。首先,根据开挖荷载释放过程中... 在富水、高压、不良地质条件下,如何评估施工过程中的突水突泥破坏风险等级,是地下隧洞施工设计的难题。正确分析地下隧洞开挖应力与渗流耦合互馈作用,是合理模拟地下隧洞施工开挖突水突泥演化过程的关键。首先,根据开挖荷载释放过程中的围岩损伤演化机理,提出了根据不同变形阶段围岩损伤特性计算相应围岩损伤系数的方法,并分析其对渗透系数的影响。然后,根据围岩破坏特性和突水破坏机理,提出了围岩临界突水系数的计算方法,并根据围岩损伤破坏和渗透破坏程度,将突水突泥破坏划分成4个风险等级,为地下隧洞施工开挖突水突泥破坏风险评估提供了依据。最后,根据渗流变化与应力损伤互馈耦合作用原理,提出了变损伤刚度、开挖荷载加权分级以及渗流荷载迭代施加的耦合计算方法,模拟了地下隧洞施工开挖突水突泥演化发展过程。将该方法运用于工程实际,证明了所提理论和分析方法的合理性,为地下隧洞开挖突水突泥演化判别提供了一个可行的分析思路。 展开更多
关键词 突水突泥 地下隧洞 施工开挖 数值模拟 耦合迭代
下载PDF
王家寨隧道第三系半成岩富水段涌水突泥机制及风险评估
11
作者 刘成文 刘刚 +1 位作者 徐华 丁国鹏 《隧道建设(中英文)》 CSCD 北大核心 2024年第S01期139-148,共10页
为探究隧道穿越第三系半成岩富水段时引发的涌水突泥、冒顶等地质灾害机制,依托云南临清高速公路王家寨隧道,通过室内力学试验和模糊层次分析法,对第三系半成岩力学特性、作用机制及涌水突泥灾害风险进行分析。研究表明:1)王家寨隧道第... 为探究隧道穿越第三系半成岩富水段时引发的涌水突泥、冒顶等地质灾害机制,依托云南临清高速公路王家寨隧道,通过室内力学试验和模糊层次分析法,对第三系半成岩力学特性、作用机制及涌水突泥灾害风险进行分析。研究表明:1)王家寨隧道第三系半成岩遇水软化特性明显,随着含水率增加其黏聚力先增后减,内摩擦角不断减小,含水率为18%时黏聚力与内摩擦角分别为12.53 k Pa和7.35°,围岩逐渐失稳。2)软弱的第三系半成岩、高地下水量及隧道开挖扰动为王家寨隧道第三系半成岩富水段发生涌水突泥灾害的主要影响因素。3)王家寨隧道第三系半成岩段可按工程地质条件、水文地质条件划分为A、B、C、D 4段,各段涌水突泥灾害风险由大到小排序为B段=C段>A段>D段,其中评估的A段涌泥量与实际涌泥量较为吻合。 展开更多
关键词 公路隧道 第三系半成岩 涌水突泥 风险评估 模糊层次分析法
下载PDF
基于模糊综合评判法的区域治理效果评价方法研究
12
作者 张现辉 卢玲敏 方向清 《中国煤炭地质》 2024年第7期49-54,共6页
区域治理技术目前已广泛应用于华北型煤田深部煤层底板隔水层加固,治理效果评价主要采用突水系数方法,没有考虑治理工程质量。采用九分度法建立了治理效果评价的4个一级评价指标和15种二级评价指标的权重,并且给出了治理效果评价的模糊... 区域治理技术目前已广泛应用于华北型煤田深部煤层底板隔水层加固,治理效果评价主要采用突水系数方法,没有考虑治理工程质量。采用九分度法建立了治理效果评价的4个一级评价指标和15种二级评价指标的权重,并且给出了治理效果评价的模糊综合判别等级标准,大于等于0.63为合格,小于0.63为不合格。将评价方法应用于邢东矿-980m以深区域奥灰探查治理效果评价,综合评价等级M的量值为0.947,评价等级为合格,与实际矿井涌水量观测结果结论一致。 展开更多
关键词 矿井突水 区域注浆治理 效果评价 模糊综合判别 质量标准 邢东矿
下载PDF
隧洞突涌松散介质注浆加固技术与效果评价
13
作者 刘俊峰 郝俊锁 邢飞 《中国水能及电气化》 2024年第1期3-12,28,共11页
为解决滇中引水工程中狮子山隧洞施工中遇到的突泥、突水问题,采用帷幕预注浆技术进行地层加固处治。针对2处地质构造和突涌介质堆积体不同的工程特性,提出了岩石碎屑高压喷射灌浆加固技术和泥质介质渗透性注浆加固技术,并对岩石碎屑高... 为解决滇中引水工程中狮子山隧洞施工中遇到的突泥、突水问题,采用帷幕预注浆技术进行地层加固处治。针对2处地质构造和突涌介质堆积体不同的工程特性,提出了岩石碎屑高压喷射灌浆加固技术和泥质介质渗透性注浆加固技术,并对岩石碎屑高压喷射注浆与泥质介质注浆加固机理、帷幕注浆设计方案、施工工艺和技术、注浆效果综合评价方法进行了深入研究论证。应用结果表明,隧洞突涌体纵向加固范围为30m,径向加固范围为轮廓线以外5m,注浆加固形成了稳定的复合承载帷幕体,确保了该隧洞突涌灾害处治科学可靠,实现了突涌洞段安全掘进。 展开更多
关键词 隧洞工程 突水突泥 注浆加固 评价
下载PDF
综合超前地质预报技术在格莱村隧道中的应用 被引量:1
14
作者 鲜云华 《价值工程》 2024年第7期56-58,共3页
随着我国西南地区岩溶隧道建设数量的逐年增加,隧道施工过程中经常遇见坍塌掉块、突水涌泥等病害,给隧道施工造成了较大的困扰。因此,利用地质调查法、地质雷达法、地震波反射法、超前钻探法、综合预报法相结合的综合超前地质预报技术,... 随着我国西南地区岩溶隧道建设数量的逐年增加,隧道施工过程中经常遇见坍塌掉块、突水涌泥等病害,给隧道施工造成了较大的困扰。因此,利用地质调查法、地质雷达法、地震波反射法、超前钻探法、综合预报法相结合的综合超前地质预报技术,对格莱村隧道掌子面前方及洞周影响范围内的工程地质特性和水文地质条件进行勘探,以确保岩溶隧道施工安全。结果表明:格莱村隧道综合超前地质预报效果良好,充分发挥了各超前地质预报方法的优势,提高了超前地质预报的精准度,有效预防了坍塌、掉块、突水、突泥等地质灾害的发生,降低了岩溶隧道的施工风险。 展开更多
关键词 岩溶隧道 突水涌泥病害 综合超前地质预报 隧道施工安全
下载PDF
复杂地质条件下岩溶台地隧道灾变风险评估:以安平隧道为例
15
作者 胡新红 龚道平 +2 位作者 胡惠华 钟龙辉 姚军 《科学技术与工程》 北大核心 2024年第4期1679-1688,共10页
复式向斜岩溶台地地质条件复杂,隧道穿越时,多发生突水涌泥等地质灾害。以安平隧道为例,在隧道线路设计初期,从地质角度出发,分析隧道线路范围内存在的5个主要地质问题及可能发生的地质灾变风险,并逐一对其进行评估和评价;采用宜避不宜... 复式向斜岩溶台地地质条件复杂,隧道穿越时,多发生突水涌泥等地质灾害。以安平隧道为例,在隧道线路设计初期,从地质角度出发,分析隧道线路范围内存在的5个主要地质问题及可能发生的地质灾变风险,并逐一对其进行评估和评价;采用宜避不宜扰的地质选线理念,根据评价结果选择路线绕避方案和确定平纵设计指标。研究成果对类似复杂地质条件下的岩溶台地隧道地质选线和路线设计具有一定的借鉴意义。 展开更多
关键词 岩溶台地隧道 突水涌泥风险 采空区 瓦斯 地质选线
下载PDF
深埋隧洞穿高压富水断层涌水突泥分析与处置技术
16
作者 李建贺 牛利敏 +2 位作者 王帅 许然 陈培 《长江科学院院报》 CSCD 北大核心 2024年第10期149-156,共8页
针对隧洞穿越高压富水断层涌水突泥破坏性强、可灌性差的难题,以滇中引水工程香炉山隧洞过大栗树断裂次级断层涌水突泥灾害治理为例,通过分析隧洞涌水突泥洞段的地质特征、灾害过程与成因,提出了超前钻探、超前灌浆、超前泄压、超前支... 针对隧洞穿越高压富水断层涌水突泥破坏性强、可灌性差的难题,以滇中引水工程香炉山隧洞过大栗树断裂次级断层涌水突泥灾害治理为例,通过分析隧洞涌水突泥洞段的地质特征、灾害过程与成因,提出了超前钻探、超前灌浆、超前泄压、超前支护组合处置对策。针对隧洞下半断面围岩碎粉含量高、阻止浆液扩散导致注浆效果不佳的问题,提出了置换式注浆加固技术,即注浆孔分A孔、B孔,通过A孔注浆,B孔泄压并冲出岩粉的方式进行注浆,以利于岩粉排出和浆液扩散,成功解决了香炉山隧洞DLI3+681.5涌水突泥灾害治理技术难题。研究成果对类似地质条件下隧洞涌水突泥灾害治理提供参考。 展开更多
关键词 深埋隧洞 富水断层 涌水突泥 处置对策 置换式注浆加固技术 灾害治理
下载PDF
底板承压水上底抽巷破坏特征及控制技术 被引量:1
17
作者 董相欢 《陕西煤炭》 2024年第6期70-76,共7页
针对承压水上掘进底抽巷易导致底板突水事故,底抽巷层位选取不合理将造成瓦斯抽采效率低的问题,以古汉山煤矿1508工作面底抽巷为工程背景,通过分析底板突水发生机理及其围岩塑性区分布特征,确定底抽巷合理的布置层位并提出围岩协同控制... 针对承压水上掘进底抽巷易导致底板突水事故,底抽巷层位选取不合理将造成瓦斯抽采效率低的问题,以古汉山煤矿1508工作面底抽巷为工程背景,通过分析底板突水发生机理及其围岩塑性区分布特征,确定底抽巷合理的布置层位并提出围岩协同控制技术。现场试验表明,底抽巷围岩不均衡的塑性区明显使底板隔水层厚度变小,底板突水危险性高。底抽巷在垂向上距煤层底板12 m,水平方向上内错回采巷道8 m。采用以增强锚网索锚固体系能力、底角岩层稳定性及其护表能力为主,局部区域进行注浆加固为辅的综合方法对底抽巷进行治理。试验期间,底抽巷顶底板变形233 mm、两帮变形量变形209 mm后基本稳定;瓦斯抽放孔采出率得到明显提高,确保了工作面安全开采。 展开更多
关键词 底板突水 底抽巷治理 瓦斯抽采 围岩控制 注浆加固
下载PDF
富水地层破碎围岩浅埋隧道突水涌泥段大变形处置措施
18
作者 翁贤杰 陈海兵 +1 位作者 张龙生 余俊 《河北地质大学学报》 2024年第4期64-70,共7页
松散围岩隧道施工中发生突水涌泥危险性极大,处理不慎容易发生二次事故,造成较大的人员财产损失。以牛拦岗隧道左线Z2K219+077及右线K219+081的突水涌泥段的大变形事故为背景,深入分析了项目施工过程中的各种危险因素以及事故的产生原因... 松散围岩隧道施工中发生突水涌泥危险性极大,处理不慎容易发生二次事故,造成较大的人员财产损失。以牛拦岗隧道左线Z2K219+077及右线K219+081的突水涌泥段的大变形事故为背景,深入分析了项目施工过程中的各种危险因素以及事故的产生原因,并以此提出了一种洞内拱顶环向一圈帷幕注浆加固围岩,并用临时止浆墙来稳定掌子面的方法来抑制突水涌泥以及拱顶大变形现象。根据现场的实际监控量测数据,验证了该方法能有效抑制隧道施工过程中的拱顶沉降速率,对于处置突水涌泥段的大变形问题有实际的可行性。 展开更多
关键词 富水浅埋隧道 突水涌泥 大变形 处置措施
下载PDF
不同位置承压溶洞对隧道施工影响研究
19
作者 林裕 《科技资讯》 2024年第7期162-167,共6页
承压溶洞作为典型不良地质条件,在隧道近接其施工时,容易因为地层渗流的增加及塑性区的发展,产生突水突泥灾害,威胁到隧道施工安全。以金岩隧道工程为例,采用数值模拟手段,研究了近接不同位置(拱顶、边墙、拱底)承压溶洞时,地层与隧道... 承压溶洞作为典型不良地质条件,在隧道近接其施工时,容易因为地层渗流的增加及塑性区的发展,产生突水突泥灾害,威胁到隧道施工安全。以金岩隧道工程为例,采用数值模拟手段,研究了近接不同位置(拱顶、边墙、拱底)承压溶洞时,地层与隧道结构的位移与渗流特点。结果表明:溶洞位于拱顶、边墙、拱底的地表最大沉降分别为3.10 cm、3.00 cm、2.93 cm。说明当拱顶存在溶洞时,地表变形最为危险,而拱底溶洞对隧道施工产生的地层扰动影响最小;随着向掌子面的靠近,地层渗流速度逐渐提高,且在临近掌子面时流速呈现陡增形态。3种工况中流速极值分别为0.026 cm/s、0.027 cm/s、0.030 cm/s,拱底流速最大,这是因为拱底溶洞埋深最大,溶洞压力水头最大所导致。当承压溶洞临近隧道边墙时,地层塑性区向溶洞贯通,再结合地层渗流分布,可见此工况最容易发生突水突泥灾害。 展开更多
关键词 承压溶洞 隧道施工 流固耦合 塑性区 突水突泥
下载PDF
超深基坑内贯入承压水层管桩抗突涌处理方法研究
20
作者 董锋 《建筑施工》 2024年第5期732-736,共5页
结合上海某地铁车站超深基坑工程在旧厂区的施工实例,介绍一种超深基坑内贯入承压水层管桩抗突涌的处理方法,通过采取全回转全套管钻机拔桩、RJP工法旋喷桩加固封底、应急减压降水等处理方法,保证了超深基坑工程的安全,可为今后类似工... 结合上海某地铁车站超深基坑工程在旧厂区的施工实例,介绍一种超深基坑内贯入承压水层管桩抗突涌的处理方法,通过采取全回转全套管钻机拔桩、RJP工法旋喷桩加固封底、应急减压降水等处理方法,保证了超深基坑工程的安全,可为今后类似工程的施工和设计提供借鉴。 展开更多
关键词 深基坑 承压水 管桩 抗突涌 处理方法
下载PDF
上一页 1 2 16 下一页 到第
使用帮助 返回顶部