黄土高原城市工程地质分区——以铜川地区为例
发布时间：2018-10-23 20:07
【摘要】：城市新区的科学选址及规划需要以明确的工程地质条件为基础,因此开展城市周边工程地质分区研究已成为当前城镇发展工作中的关键环节。本文以铜川地区为例,根据地质构造及地貌演化确定了地貌类型,依据第四纪沉积物组合差异将地层沉积结构划分为风成沉积型、冲洪积型及风成-冲洪积复合沉积型。根据湿陷性试验结果,研究区内黄土埋深超过22m不具自重湿陷性,埋深超过24 m不具湿陷性;根据湿陷量计算值将研究区划分为非湿陷区、2级、3级和4级湿陷区。在此基础上将研究区划分为4个区(低中山区、黄土台塬区、黄土丘陵区和河谷阶地区)及8个亚区,并总结了各工程地质区的工程特性,其中:低中山区及黄土丘陵区不适宜建筑;黄土台塬区的2级湿陷高台塬亚区和2级湿陷低台塬亚区为适宜建筑;河谷阶地区部分适宜建筑;黄土台塬区的3级、4级湿陷高台塬亚区及3级、4级湿陷低台塬亚区进行地基处理后适宜建筑。研究成果可为黄土高原地区相似地质条件下的未来城市选址及工程建设规划提供指导和借鉴。
[Abstract]:The scientific location and planning of new urban areas need to be based on clear engineering geological conditions. Therefore, the study of engineering geological zoning around the city has become a key link in the development of cities and towns at present. Taking Tongchuan area as an example, the geomorphological types are determined according to geological structure and geomorphological evolution. According to the difference of Quaternary sediment assemblages, the sedimentary structure of strata is divided into three types: aeolian sedimentary type, alluvial type and aeolian alluvial composite sedimentary type. According to the results of collapsibility test, the loess buried depth more than 22 m has no self-gravity collapsibility, and the buried depth more than 24 m does not have collapsibility, according to the calculated value of collapsibility, the study area can be divided into non-collapsible area, grade 2, grade 3 and grade 4. On this basis, the study area is divided into 4 regions (low middle mountain area, loess tableland region, loess hilly area and valley stage area) and 8 subregions, and the engineering characteristics of each engineering geological area are summarized. Among them, the low middle mountain area and loess hilly area are not suitable for construction, the grade 2 high platform subregion and the 2 grade low platform subregion of the loess plateau area are suitable for construction, the part of valley stage area is suitable for building; The grade 3, grade 4, grade 4 and grade 3 of the loess tableland are suitable for construction after foundation treatment. The research results can provide guidance and reference for future urban site selection and engineering construction planning under similar geological conditions in the Loess Plateau.
【作者单位】： 长安大学地质工程与测绘学院;
【基金】：国家重点基础研究发展计划(“973”计划)项目(2014CB744701) 国家自然科学基金项目(40972181,413032251) 中国地质调查局项目(12120114056901)~~
【分类号】：P642.4
本文编号：2290334
[Abstract]:The scientific location and planning of new urban areas need to be based on clear engineering geological conditions. Therefore, the study of engineering geological zoning around the city has become a key link in the development of cities and towns at present. Taking Tongchuan area as an example, the geomorphological types are determined according to geological structure and geomorphological evolution. According to the difference of Quaternary sediment assemblages, the sedimentary structure of strata is divided into three types: aeolian sedimentary type, alluvial type and aeolian alluvial composite sedimentary type. According to the results of collapsibility test, the loess buried depth more than 22 m has no self-gravity collapsibility, and the buried depth more than 24 m does not have collapsibility, according to the calculated value of collapsibility, the study area can be divided into non-collapsible area, grade 2, grade 3 and grade 4. On this basis, the study area is divided into 4 regions (low middle mountain area, loess tableland region, loess hilly area and valley stage area) and 8 subregions, and the engineering characteristics of each engineering geological area are summarized. Among them, the low middle mountain area and loess hilly area are not suitable for construction, the grade 2 high platform subregion and the 2 grade low platform subregion of the loess plateau area are suitable for construction, the part of valley stage area is suitable for building; The grade 3, grade 4, grade 4 and grade 3 of the loess tableland are suitable for construction after foundation treatment. The research results can provide guidance and reference for future urban site selection and engineering construction planning under similar geological conditions in the Loess Plateau.
【作者单位】： 长安大学地质工程与测绘学院;
【基金】：国家重点基础研究发展计划(“973”计划)项目(2014CB744701) 国家自然科学基金项目(40972181,413032251) 中国地质调查局项目(12120114056901)~~
【分类号】：P642.4
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