预应力锚索技术在云南山区高速公路边坡加固中的应用

介绍了预应力锚索技术在加固工程中的原理，预应力锚索技术在应用中的几种常用形式，并以云南山区高速公路几个典型的滑坡治理工程阐述预应力锚索技术的应用，作为类似工程的参考和借鉴。     

自锁型预应力锚索的试验研究

本文主要针对当前大量应用的常规预应力锚索结构忽略张拉段地层能量场的局限性,通过机理分析、结构设计、模型试验、现场测试试验等方法,研制出自锁型预应力锚索.并在自锁荷载试验测试数据的基础上,对自锁锚固性能和效果进行了分析,同时分析了该种预应力锚索与常规结构形式之间的适用特点,为该种预应力锚索的应用提供了理论和实践的依据.     

预应力锚索在地铁明挖支撑体系中的应用

预应力锚索广泛应于在软岩、土体边坡加固及明挖支撑体系等工程中。文章结合沈阳市地铁一号线黎明文化宫车站锚索支撑体系施工实例，分析预应力锚索在地铁车站明挖支撑体系防护中的特点及原理，提出了预应力锚索结构的构造要点，阐述了锚索支护应用的施工技术要点及施工工艺。     

预应力锚索整治高边坡病害施工技术

结合预应力锚索和抗滑桩在渝怀铁路DK615 + 60 2～DK615 + 83 3段路堑边坡治理滑坡中成功应用的实例 ,从预应力锚索的成孔、锚索入孔、注浆、锚墩制安、锚索张拉、锁定、封锚等施工工艺入手 ,重点介绍预应力锚索加固高边坡的施工技术。     

预应力锚索桩在天平铁路的应用

预应力锚索桩是一种加固边坡、治理滑坡的新型结构,在维护边坡稳定性和增强支挡结构抗震性能方面具有明显优势,因此其在工程实践中得到了广泛的应用．本文以预应力锚索桩在天平铁路的工程应用为背景,介绍了预应力锚索桩的受力机理,基于变形协调条件的计算分析方法及其在膨胀性泥岩路堑边坡治理工程中的实际应用．     

采用预应力锚索加固路堑陡坡

结合梅坎铁路丙村车站路堑边坡采用预应力锚索的成功应用实例，介绍预应力锚索施工设计的主要技术标准和施工工艺。     

南昆线山体滑坡整治中的预应力锚索施工技术

介绍在南昆线K343山体滑坡治理中的预应力锚索施工技术应用，总结了施工经验，介绍了预应力锚索具有受力可靠、施工简便、施工进度快、减少土石方数量等特点。     

格梁预应力锚索路堑边坡加固防护设计与施工

结合烟(台)大(连)轮渡路基工程实例,分析预应力锚索岩土加固法的工作原理,提出格梁预应力锚索结构设计的构造要点,详细总结格梁锚索路堑边坡防护应用的施工技术要点和注意事项,并对技术应用效果进行试验评价。     

预应力锚索抗滑桩治理库岸滑坡施工技术

依托三峡库区一处大型库岸滑坡治理工程的成功实践,总结了预应力锚索抗滑桩治理库岸滑坡工程的施工技术,包括预应力锚索和抗滑桩施工工艺,并在三峡库区非水下滑坡治理工程中成功应用。     

应用预应力锚索对老鸦岩隧道进口段右侧山坡蠕滑体的整治

本文概述预应力锚索在宝成二线山坡蠕滑体整治中的应用，简要介绍了锚索、施工工艺及检测方法。     

预应力锚索抗滑桩结构优化

在对各种抗滑桩支挡结构的适用条件进行系统研究的基础上,进行传统锚索抗滑桩的结构优化。研究表明,在桩身弯矩峰值处加设锚索约束,可减小桩身弯矩。运用有限元计算方法进行单锚点预应力锚索抗滑桩的内力计算,按照"削峰填谷"的思路,在桩身弯矩峰值处加设第2个锚点,并在得到的二锚点预应力锚索抗滑桩的桩身弯矩峰值处加设第3个锚点,在此结构形式的基础上,上下移动第2和第3锚点位置,直至桩身弯矩峰值最小,找出最合理的锚点位置。在同等滑坡推力作用条件下,优化后的三锚点抗滑桩比普通抗滑桩节省工程造价33%,比单锚点抗滑桩节省10%。对于厚层大型滑坡,多锚点预应力锚索抗滑桩有着更好的推广和应用价值。     

预应力锚索在隧道偏压溶腔施工中的应用

通过在隧道施工中采用预应力锚索加临时支撑及配合围岩量测观察初支稳定性的办法,安全通过隧道偏压溶腔,为类似施工提供了一种解决思路。     

The Reinforcement Analysis of Prestressed Anchor Frame Beam in the Deep Cutting Slope under Three Dimensional Strong EarthquakeEI北大核心

Research purposes: In order to further study the reinforcement of prestressed anchor frame beam in the deep cutting slope under three dimensional strong earthquake, a model of the deep cutting slope is built through FLAC 3D simulation software, the seismic wave to the model from three directions of x,y and z is input, and the dynamic response of the slope is analyzed. Then, the prestressed anchor frame beam reinforcement measures are applied to the model, and this paper analyzes the reinforcement effect of the prestressed anchor frame beam to the deep cutting slope under three dimensional strong earthquake. Research conclusions:(1) The prestressed anchor frame beam has a good effect on restraining the horizontal displacement of the deep cutting slope. (2) Under the three dimensional strong earthquake, the prestressed anchor frame beam has a good effect on the horizontal acceleration and horizontal velocity of the deep cutting slope, which reduces the peak of horizontal acceleration and horizontal velocity. (3) Through the comparison of the response before and after the reinforcement of the prestressed anchor frame beam is given under the 9 degrees three dimensional strong earthquake, it can be concluded that the prestressed anchor frame beam can provide good reinforcement effect to the deep cutting slope. (4) This research can be used for reference to the earthquake resistance of the slope engineering. © 2018, Editorial Department of Journal of Railway Engineering Society. All right reserved.     

预应力锚杆在铁路边坡防护中的应用

近年来预应力锚杆施工技术在铁路工程中已得到广泛应用,本文通过分析锚杆在各种土体加固中的作用机理,结合京九复线龙川至东莞段预应力锚杆在高边坡防护工程中的施工实践,介绍其施工工艺和施工注意事项,并提出几点体会,可供类似工程参考。     

预应力锚索框架梁施工质量控制要点

研究目的:武广铁路客运专线路堑施工中大量采用了预应力锚索框架梁加固边坡,本文研究在预应力锚索框架梁施工中,如何有效地对各工序进行质量控制。研究结果:本文总结了预应力锚索框架梁施工中的锚索试验、测量、造孔、编索、安装、注浆等重要工序的质量控制措施,建立了常规施工条件下预应力锚索框架梁施工质量控制框构。     

A New Technique of High-performance and Fast Tensioning Prestressed Anchorage CableEI北大核心

Research purposes: The large-span transition section tunnel of the Badaling Great Wall station on the Beijing-Zhangjiakou high-speed railway with the maximum excavation width of 32.7 m, and the largest excavation area of 494.4 m 2 , is the world's biggest traffic tunnel in the world with the largest excavation width and excavation area, which has difficult construction and high security risks. The initial support system of tunnel is mainly realized by prestressed bolt, prestressed cable and shotcrete. After test, anchor cable tension using the traditional anchor cable construction technology can't meet the design requirements, at the same time, it takes about 30 days to achieve prestressed tensioning. Therefore, we need to study the high-performance fast tensioning prestressed anchor cable technology, to effectively control surrounding rock deformation, to ensure the safety of construction, improve construction efficiency. Research conclusions:(1) The traditional anchor cable construction technology is adopted. The anchor cable tension value is mainly controlled by the grip force between the anchor rope and grouting body and the cohesive force between grouting body and surrounding rock. (2) The grip force between the anchor rope and the grouting body can be increased by about 2 times by increasing the "barb"; The cohesive force between the grouting body and the surrounding rock can be increased by 1.5 times by 6 ~ 7 MPa high-pressure grouting process. (3) The modified sulphoaluminate cement slurry can reach more than 30 MPa within 1 day of the slurry strength, so as to realize fast anchor cable tension within 1 day after grouting completion. (4)The research results can be used for reference in similar prestressed anchorage cable construction projects. © 2018, Editorial Department of Journal of Railway Engineering Society. All right reserved.     

温福铁路路堑高边坡预应力锚索锚固工程施工工艺

结合工程实例，介绍了在路堑高边坡防护工程中预应力锚索锚固的施工工艺，并通过对锚索的试验与监测，为高边坡锚固工程的动态设计提供有关参数，可供同类工程借鉴。     

单箱双室箱梁预制施工关键技术研究

结合工程实例介绍预应力单箱双室箱梁的预制施工工艺,全面总结了从箱梁台座制作、立模、混凝土浇筑,到预应力钢束张拉、灌浆、封锚全过程的施工工艺,提供了相应的施工方法、混凝土配合比、振捣时间和预应力张拉等各种技术数据,旨在对今后类似箱梁的预制起到借鉴作用。     

广州地铁某轨排基地基坑支护结构施工技术

以广州地铁7号线一期工程陈村北站轨排基地基坑混凝土支撑及预应力锚索支护结构施工为背景,深入研究深基坑泥质粉砂岩地质条件下的混凝土支撑及预应力锚索支护施工方法及流程;从施工现场技术质量把控及施工流程角度切入,确保施工质量、施工安全和施工进度。以期对后续类似工程提供借鉴。