西宁地区第三系地层岩土工程特性及影响

摘要
图/表
参考文献
相关文章 (1)

全文: PDF (951 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要研究目的：兰青二线、兰新第二双线以及西宁火车站改造等重点铁路工程的勘察设计结果表明，西宁地区第三系地层泥岩夹石膏岩具有特殊的岩土工程性质。本文从第三系泥岩夹石膏岩的基本力学特征及崩解性分析入手，对其膨胀性依据规范进行判定，讨论泥岩夹石膏岩对钢筋混凝土是否存在腐蚀性问题，以研究其对铁路工程的影响。

研究结论：西宁地区第三系泥岩夹石膏岩的力学性质在一定的环境下，表现出不同的特征，在自然状态下，其工程性质较好，但在浸水及长时间暴露在空气中后，极易膨胀、溶蚀、软化、崩解，其强度和基本承载力降低，并会使环境水具腐蚀性。铁路路堤、路堑、隧道工程应对其膨胀特性采取相应工程措施，桥梁、房建桩基应考虑泥岩夹石膏岩溶蚀引起环境水对钢筋混凝土的腐蚀性问题。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	张晓宇

关键词 ：西宁地区, 泥岩夹石膏岩, 膨胀性, 腐蚀性

Abstract：Research purposes:The survey and design results of the second line of Lanzhou － Qinghai Railway，the second double line of the Lanzhou － Xinjiang Railway and the upgrading of the Xining Station show the tertiary mudstone with gypsum rock of the tertiary strata in Xining has the special engineering properties． This paper analyzes the basic mechanical characteristics and the disintegration of the tertiary mudstone with gypsum rock fist，then compares and determines the specification of its expansibility，and discusses the problem of whether there is corrosion existed in the mudstone with gypsum rock to the reinforced concrete，and finally analyzes the impact on the railway engineering．

Research conclusions:In a certain environment，the mechanical properties of the tertiary mudstone with gypsum rock in Xining have the different characteristics． In the natural state，it has good engineering property，but after being immersed into water and exposed to the air for long time，it easily swells，corrodes，softens and disintegrates，resulting in reduction of its intensity and basic bearing capacity and making the environmental water corrosive．The engineering measures should be taken for its expansion characteristics in building railway embankment，cutting and tunnel and in building bridge and construction of the pile foundation of building，the attention should be paid to the environmental water corrosion to the reinforced concrete caused by mudstone with gypsum rock dissolution．

Key words： Xining region mudstone with gypsum rock expansibility corrosion

收稿日期: 2012-02-10

PACS:

TU451

作者简介: 张晓宇，1982 年出生，男，工程师

引用本文:

张晓宇. 西宁地区第三系地层岩土工程特性及影响[J]. 铁道工程学报, 2012, 29(8): 20-23.
ZHANG Xiao － yu. Geotechnical Engineering Properties and Impact of Tertiary Strata in Xining. 铁道工程学报, 2012, 29(8): 20-23.

链接本文:

http://tdgcxb.crec.cn/CN/ 或 http://tdgcxb.crec.cn/CN/Y2012/V29/I8/20

［1］张启龙，杨刚．西宁盆地第三系地层对工程的影响［J］．铁道勘察，2010(1) :31－33．

Zhang Qilong，Yang Gang． Influence of Teritiary in Xining Basin on Engineering［J］．Railway Investigation and Surveying，2010(1) : 31－33．

［2］ GB 50007—2002，建筑地基基础设计规范［S］．

GB 50007—2002， Code for Design of Building Foundation［S］．

［3］ TB 10012—2007，铁路工程地质勘察规范［S］．

TB 10012—2007， Code for Geology Investigation of Railway Engineering［S］．

［4］ GB 112—87，膨胀土地区建筑技术规范［S］．

GB 112—87，Code for Building Technology of Expansive Soil［S］．

［5］ TB 10077—2001，铁路工程岩土分类标准［S］．

TB 10077—2001，Code for Rock and Soil Classification of Railway Engineering［S］．

［6］曲永新，徐晓岚，时梦熊，等．泥质岩的工程分类和膨胀势快速预测［J］．水文地质工程地质，1988(5) :36－39．

Qu Yongxin，Xu Xiaolan，Shi Mengxiong，etc． The Engineering Classification of Mud Rock and Its Rapid Forecast of Swelling Power ［ J ］． Journal of Hydrogeology and Engineering Geology，1988(5) : 36－39．

［7］张海霞，张福海，张文慧，等．青海省第三系泥岩的膨胀性和力学性研究［J］．人民黄河，2005 (1) :54－55．

Zhang Haixia， Zhang Fuhai， Zhang Wenhui，etc． Reserch of Qinghai Tertiary Mudstone and Mechanical Expansion［J］． Yellow Riwer，2005 (1) : 54－55．

［8］ GB 50021—2001，岩土工程勘察规范［S］．

GB 50021—2001，Code for Investigation of Geotechnical Engineering［S］．

［9］魏玉峰，聂德新，荀晓慧，等．黄河黄丰水电站坝基泥岩中厚石膏层的影响［J］．水利水运工程学报，2007(2) : 71－75．

Wei Yufeng，Nie Dexin，Xun Xiaohui，etc． Influences of Thick Gypsum Layer in Mudstone of Foundation of Huangfeng Hydropower Plant on the Yellow River［J］． Hydro － Science and Engineering，2007(2) : 71－75．

［10］钱伟平，毕焕军．西北铁路工程地质特征及成就［J］．铁道工程学报，2010(S) :68－84．

Qian Weiping， Bi Huanjun． Engineering Geological Characteristics and Achievement of Northwest Railway ［J］． Journal of Railway Engineering Society，2010(S) : 68－84．