共查询到19条相似文献，搜索用时 156 毫秒
1.
《邢台职业技术学院学报》2019,(3):73-76
隧道衬砌渗水已成为影响运营隧道结构强度和稳定的关键因素。为了能在运营隧道的日常管理与维护过程中有效预防运营隧道衬砌渗水的发生,从衬砌边墙渗水及综合洞室渗水、衬砌施工缝裂纹掉块方面进行分析,并提出有效的整治措施,为同类工程施工提供借鉴。 相似文献
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王睿 《廊坊师范学院学报(自然科学版)》2010,10(2)
隧道工程是构筑在地表之下的结构物,因而总是处在各种地下水的包围之中.在隧道设计、施工或使用过程中任何有害扰动都会造成隧道防排水体系的缺陷,从而引起隧道渗水.文章从多方面对隧道渗水的原因展开讨论,并结合我国隧道工程施工技术现状,提出隧道渗漏水的防治措施. 相似文献
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《佳木斯教育学院学报》2019,(5)
在铁路隧道工程施工建设的过程当中,如果出现了防水性方面的问题,将会对工程混凝土结构的应用安全性以及使用寿命形成直接的影响。所以,国家规定了需要依据隧道无渗水以及无湿渍的标准对铁路隧道工程的防水做出检查,防止隧道工程出现渗水问题,影响到隧道的正常使用,甚至威胁到人们的生命财产安全。本文主要结合一工程实例,针对防水板在铁路隧道施工中的应用进行了简要的分析。 相似文献
4.
王文锋 《闽西职业技术学院学报》2007,9(2):24-27
隧道建成投入运营后,为确保行车速度、行车安全及洞内设备的正常使用,必须保证隧道内各部位不渗水,因此隧道结构施工防排水措施的到位尤其重要,结合漳龙高速公路乌石山隧道施工,介绍隧道结构防排水施工。 相似文献
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蔡德智 《延安教育学院学报》2012,26(3):106-107
隧道路面排水基层,在隧道路面工程中起着相当重要的作用,它既要承担行车荷载,还要排除部分来自路面清洁、消防、行车和隧道围岩的渗水。就现行《公路隧道施工技术规范JTGF60-2009》、《公路隧道设计规范JTGD70-2004》非常粗略,并无隧道路面结构层及原材料相关技术标准要求,在实际施工过程中,只能完全依赖设计文件要求或参考其他资料进行相关试验。这样以来一：给施工、及工程管理带来不便,二：无形中给工程埋下质量隐患。 相似文献
6.
冉茂易 《语数外学习(初中版)》2009,(1):14-16
溪水
李汉荣
一条大河有确切的源头,一条小溪是找不到源头的。你看见某块石头下面在渗水,你以为这就是溪的源头,而在近处和稍远处,有许多石头下面、树丛下面也在渗水,你就找那最先渗水的地方,认它就是源头。可是那最先渗水的地方只是潜流乍现,不知道在距它多远的 相似文献
7.
郭英强 《闽西职业技术学院学报》2001,(3):87-88
改革开放以来,随着农村生活水平的不断提高,农民兴建住宅楼已非常普遍。但由于农村施工队伍总体水平较低,所建楼房的质量也往往存在一些问题。笔者通过对农村住宅外墙渗水的情况调查,并通过近几年来从事村镇建设工作所积累的经验,粗略归纳了如山墙渗水、外墙框部位渗水、墙洞渗水等几方面常见的渗水部位,分析了墙体产生渗水的原因,并提出了一些防治措施。 相似文献
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李汉荣 《青苹果(高中版)》2009,(12):47-48
一条大河有确切的源头,一条小溪是找不到源头的,你看见某块石头下面在渗水．你以为这就是溪的源头,而在近处和稍远处,有许多石头下面、树丛下面也在渗水,你就找那最先渗水的地方,认为它就是源头,可是那最先渗水的地方只是潜流乍现,不知道在距它多远的地方,又有哪块石头下面或哪丛野薄荷附近,也眨着亮晶晶的眸子。 相似文献
10.
EPS板在外墙外保温工程的实际应用中会产生许多质量问题,其中局部渗水将直接影响外墙外保温工程的耐久性能及使用功能。对局部最易出现渗水的节点位置(女儿墙、门窗口、阳台、分格缝处)提前采用预防措施,就可防止渗水现象的出现。 相似文献
11.
Tunnel face stability is important for safe tunneling and the protection of the surrounding environment. Upper bound analysis is a widely applied method to investigate tunnel face stability. In this paper, a tunnel face collapse of Guangzhou metro line 3 is presented. Accordingly, seepage is considered in the upper bound solutions for face stability in layered soils. Steady-state seepage is reached in the first 1200 s of each drilling step. In the crossed layer, the seepage flow is horizontal toward the tunnel face, whereas in the cover layer, the seepage vertically percolates into the crossed layer. By considering the seepage forces on the tunnel face and on the soil particles, the upper bound solution for the support pressure needed for face stability in layered soil with seepage is obtained. Under saturated conditions, the support pressure is influenced by the variation of the depth ratio due to the seepage effect. Moreover, the support pressure depends linearly on the groundwater level. This study provides estimations of the support pressure for face stability in tunnel design. 相似文献
12.
锦屏二级水电站深埋隧洞渗控研究 总被引：3，自引：0，他引：3
王美芹 《长江工程职业技术学院学报》2003,20(4):26-28
用降雨入渗渗流有限单元法对锦屏二级水电站深埋隧洞最大埋深断面渗流场的水头分布进行了数值模拟。结合工程的现拟渗控措施经多种计算方案的求解，较详细地综合分析了各计算方案的渗控情况与特点，并获得了该断面隧洞支护上的外水压力及最优的渗控方案。 相似文献
13.
In most studies of tunnel boring machine(TBM)tunnelling, the groundwater pressure was not considered, or was simplified and exerted on the boundary of lining structure. Meanwhile, the leakage, which mainly occurs in the segment joints, was often ignored in the relevant studies of TBM tunnelling. Additionally, the geological models in these studies were simplified to different extents, and mostly were simplified as homogenous bodies. Considering the deficiencies above, a 3D refined model of the surrounding rock of a tunnel is firstly established using NURBS-TIN-BReP hybrid data structure in this paper. Then the seepage field of the surrounding rock considering the leakage in the segment joints is simulated. Finally, the stability of TBM water diversion tunnel is studied coupled with the seepage simulation, to analyze the stress-strain conditions, the axial force and the bending moment of tunnel segment considering the leakage in the segment joints. The results illustrate that the maximum radial displacement, the minimum principal stress, the maximum principal stress and the axial force of segment lining considering the seepage effect are all larger than those disregarding the seepage effect. 相似文献
14.
深埋圆形富水隧道应力与位移的弹塑性解 总被引：1，自引：0，他引：1
研究目的：推导获得深埋圆形富水隧道应力场与位移场分布的弹塑性解析解。创新要点：皋于弹性力学厚壁圆筒受均布压力的拉姆解答和Mohr—Coulomb屈服条件,推导了考虑渗流作用和应力释放时含衬砌深埋隧道的弹塑性解,并采用FLAC3D有限差分程序验证了其正确性。研究方法：通过理论分析建立考虑渗流作用和应力释放的含衬砌深埋圆形隧道的解析模型（图1）,然后推导了基于Mohr-Coulomb屈服准则的隧道同岩与衬砌渗流场、位移场和应力场计算的弹塑性解析公式,并通过数值模拟程序（图2）验证了推导公式的正确性。重要结论：基于前人研究皋础,推导获得了深埋富水隧道应力与位移场分布的理论解析解,并通过数值模拟方法验证了其正确性。该解析解一方面可以用于深埋高水头隧道的预设计,如预测隧道周围的水压力、应力场和位移场分布规律,另一方面可用于校核大型复杂数值模型的正确性。 相似文献
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天生桥二级水电站工程三号引水隧洞不良地址段压力管直径大，材质引用日本产NK—HTTEN610U2低合金高强度钢板和LB-62UL焊条，设计、制作工艺复杂，施工难度大，方法独特，其中的焊接工艺参数可供同类材质和焊材使用借鉴． 相似文献
16.
A case study of a significant surface settlement induced by tunneling in permeable strata with the shallow tunneling method is presented in this paper. The measurements of surface settlements along the excavation direction were first analyzed to highlight the impacts of groundwater seepage. Due to the groundwater inflow inside a double-arched tunnel, the surface settlement developed to a high level far beyond the measured crown settlement. The settlement-affected zone extended to 4 times the tunnel height ahead of the forefront heading and 1.5 times the tunnel height behind the hindmost heading. Consolidation resulting from high pore pressure change was considered to be the main mechanism for the large surface settlements. In addition, a 3D fluid-mechanical coupled numerical analysis was carried out to confirm the relationship between the significant surface settlement and pore pressure variation. This analysis reveals that lowering the permeability of the small pipe grouting zone, especially of the primary lining, could lessen the drop in pore pressure in the overlying strata, further reducing the total surface settlement. The numerical results also suggest that the transverse range of vertical displacement could be quite wide, and the settlement developed integrally from the tunnel crown towards the ground surface due to groundwater seepage. Moreover, the effect of advance drainage on surface settlement was investigated based on the same numerical model. Drainage with horizontal boreholes could considerably increase the safety of tunnel heading but had limited impact on surface settlement. Finally, the applications of pre-grouting and advance drainage measures were discussed for tunneling cases in permeable strata. 相似文献
17.
分别介绍《水力学》和《土力学》中所讲授的渗流相关内容,并分析两门课中渗流知识的异同点及相互关系,结果表明两个课程中渗流内容侧重点不同,不可相互替代,最后对这两门课中渗流部分内容的教与学进行探讨,建议教学时引导学生将《水力学》和《土力学》两门课相关知识结合起来,并建立渗流相关内容的知识结构,到达真正理解和掌握渗流相关知识的目的。 相似文献
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基于多孔介质渗流力学理论建立了垃圾填埋气体传输过程的动力学模型,采用Laplace变换对气体传输渗流场控制方程进行近似解析求解,得到了填埋气体非线性渗流的压力分布规律.由不同时间填埋气体压力随水平距离分布计算结果看出:随时间的增长,压力曲线变缓,压力增大. 相似文献