公路工程中盐渍土定性定量评价的探讨.pdf

第39卷,第2期
公路工程
Vo. 39. No. 2
2014年4月
Highway Engineering
Apr.,2014
公路工程中盐渍士定性定量评价的探讨
赵天宇,王发旺,侯建军,魏晋禁
(甘肃省交通规划劫察设计院有限责任公司,甘肃兰州730030)
摘要]盐渍土评价是盐渍土地区公路工程设计和建设的基本依据,其准确性直接影响着工程设计的科学
性和合理性,也是保证工程设计质量的基本条件。通过对比公路工程与工民建、铁路等其它工程的盐渍土评价体
系,分析了公路工程与其它工程对盐渍土划分的差异,以及公路工程标准自身对盐渍土划分相悖的情况,指出了当
前公路工程对盐渍土评价的不统一性。分析认为,导致盐渍土评价混乱性的根本原因是氯硫比定义有差异,通过
理论与实践两方面的分析,认为公路工程应沿用工民建中的氯硫比定义,同时保留自身对盐渍土的细化和扩展,以
避免评价结果的不统一,为工程设计提供科学合理的盐渍土评判结果。
〔关键词]公路工程;盐渍土;含盐量;评价
中图分类号]TU470”.2[文献标识码]A
文章编号]1674-0610(2014)02-0217-05
The Qualitative and Qauantitative Evaluation of Saline Soil
in Highway Engineering
ZHAO Tianyu, WANG Awang, HOU Jianjun, WEI Jinpan
(Gansu Province Transportation Planning, Survey Design institute Co. Ltd. Lanzhou, Gansu 730030
China)
Abstract The accurate evaluation of saline soil was the fundamental basis for the design and con-
struction in Highway engineering, which directly influenced the construction quality and the project cost.
Through a comparison of Highway engineering to Railway Engineering, Industrial and civil buildings, this
paper analyzed the evaluated differences of saline soil between Highway engineering and other engineer
ing, also the evaluated contradictions by Highway engineering itself was mentioned. Analysis showed that
these difference and contradictions was originated in the chlorine-sulfur ratio, which divided the saline
soil into different category and was given different disease to engineering construction. By the analysis
both theory and practice, the authors considered that the Highway engineering should continue to use the
definition of chlorine-sumfur ratio in Industrial and civil buildings, and persist the refinement and expan-
sion for the evaluation of saline soil. This reasonable suggestion not only could help avoid the evaluated
differences and contradictions of saline soil, but also provide scientific and rational assessed results for
engineering design in saline soil area
Key words] highway engineering; saline soil; salt content; evaluation
0前言
设过程中不可避免地要穿越大量盐渍土地区。作为
种特殊土,盐渍土对公路工程最直接的危害主要
作为一种线性工程,公路工程在地域空间上跨是浸水后的溶陷、含硫酸盐地基的盐胀和盐渍土地
度很大,可穿越不同气候、不同地貌和地层单元,途基对基础及其它地下设施的腐蚀等造成的病
径冻土、盐渍土、膨胀土、软土等特殊性岩土。我国害3-3。盐渍土对工程建设的影响,主要取决于盐
盐渍土具有分布范围广、面积大、类型多的特点,主渍土所含易溶盐的成分、性质、含盐量、含水状态等,
要分布在内陆干、半干旱地区和滨海地区,总面积以及所在地区自然条件对盐渍土稳定性的影
约90万km2,约占国土总面积的9.6%,公路建响·?。
[收稿日期]2013-06-13
[作者简介]赵天宇(1985-),男,甘肃庆阳人,博士,工程师,主要从事岩土工程研究与公略勘设计工作。