桂北山区花岗岩差异风化特征及勘察方法研究

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摘要研究目的:桂北山区花岗岩分布较广，抗风化能力差且有较大差异性，当各类工程在花岗岩风化层中通过时，受差异风化、风化球发育影响，土石类别、施工方法、设计的防护措施存在较大变化，施工中存在安全隐患，对工程造价影响巨大，如何做好花岗岩地区花岗岩的不均匀风化的勘察及影响因素研究工作，对工程建设具有重要意义。该地区某公路沿线广泛分布花岗岩，采用综合勘察手段和方法，查明花岗岩的分布特征，分析研究花岗岩差异风化的影响因素，是工程设计和施工的基础。研究结论:(1)桂北山区花岗岩的差异风化受各种因素的综合影响，且这些因素是相互作用、相互影响的；(2)采用综合勘察方法，能够查明花岗岩风化层的变化情况，获得准确的地质资料；(3)各种勘察手段相辅相成，相互印证，合理安排勘察次序，科学地进行分析、统计、研究，能够准确划分花岗岩风化特征分区，使复杂的地质问题简单化、条理化，为设计施工提供翔实可靠的基础资料；(4)该研究成果对花岗岩具有差异风化特点地区的公路、铁路等工程的勘察、设计具有借鉴意义。

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	李景山

关键词 ：花岗岩, 不均匀风化, 勘察, 特征分区

Abstract：In mountains of North Guangxi, granite has a wide distribution, which is poor weathering resistance and has bigger difference. When various engineering projects are designed and constructed in weathered granite layer, soil and rock mass classification, construction methods, designed protective measures, and project cost are affected by uneven weathering and onion weathering of granite rock. Also there are security risks in the construction process. Investigate means and methods and influencing factors research in granite rock-mass area are great important for engineering constructions. There is widely distribution of granite along the expressway in this region. By the comprehensive investigation means and method, find out the distribution of granite, analyze and research the influence factor of granite weathering which is great helpful for design and construction of engineering projects.Research conclusions:(1) Influencing factors for weathering of granite rock-mass are comprehensive in this region. Meanwhile these factors are interaction and influence each other. (2) The comprehensive investigation methods, can be used to identify the changes of granite weathering layer to obtain the accurate geological data. (3) Various survey methods complement each other, and are confirmed, arranging the investigation order, scientific analysis, statistics and research, can be accurately divided into partitions that simplify complex geological problems, principled, provide detailed and reliable basis for the design and construction data. (4) The research results have a good reference for survey and design of highway, railway and other projects with uneven weathering of granite.

Key words： granite uneven weathering investigate characteristics partition

收稿日期: 2014-05-05

PACS:

U419

作者简介: 李景山，1983年出生，男，工程师。

引用本文:

李景山. 桂北山区花岗岩差异风化特征及勘察方法研究[J]. 铁道工程, 2014, 31(10): 32-36.
LI Jing-shan. Study on Uneven Weathering of Granite and Survey Methodin Mountains of North Guangxi. 铁道工程, 2014, 31(10): 32-36.

链接本文:

http://tdgcxb.crec.cn/CN/ 或 http://tdgcxb.crec.cn/CN/Y2014/V31/I10/32

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