高水位软土路基土方填筑.rar

高水位软土路基土方填筑

摘  要：根据河南省周口高水位地质情况，介绍填前碾压及加快施工具体做法。
关键词：低液限粘土 
商周高速公路地处黄河冲击平原，主要地质条件亚砂土、亚粘土。地下水位高，填前碾压困难。CBR值小，压实度难以达到。土质含水量大，施工周期比较长。制约工程的进度计划。为解决以上困难，做路基填筑试验段。
1  工程概况
   商周高速公路NO.9合同段起点为K247+473，终点为K252+600。位于黄淮平原，属于温带大陆性半湿润半干旱季风气候区，平均降水量689～816毫米，集中在7、8、9三个月。该段地层由上而下分为三层，分别为亚砂土（厚度4.0—6.0m）、亚粘土、亚砂土。土场地处黄淮冲积平原，地面较为平坦，表面0.3到0.5m为耕植土，其下为低液限粘土。其天然含水量W=22.5--30.5%，液限WL=33.5%，塑限WP=21.8%。 
本合同段路基均为填方路基，总计填方37万立方米。为确保路基按期高效、优质完成，我合同段按施工规范要求选定
High level of soft soil roadbed earthwork

Abstract: According to the geological situation in Henan Zhoukou high level, description and speed up the construction of compacted fill before the concrete practice.
Key words: low liquid limit clay
Shang alluvial plain of the Yellow River Highway is located in the main geological conditions sandy loam, loam. High water table, fill in the former rolling difficult. CBR is small and difficult to achieve the degree of compaction. Soil moisture content is big, relatively long construction period. Constraints the project schedule. To solve the above problems, do test section subgrade construction.
1 Project Overview
   Business Week starting point for the contract segment of Highway NO.9 K247 +473, finish at K252 +600. In the Huang-Huai Plain, a temperate semi-humid and semi-arid continental monsoon climate zone, average precipitation 689 ~ 816 mm, concentrated in the 7,8,9 months. The section is divided into three strata from top to bottom, respectively, of Sandy (thickness 4.0-6.0m), loam, sandy loam. Department Huanghuai alluvial plain soil site, the ground is flatter, the surface of 0.3 to 0.5m to Cultivate soil, under which low liquid limit clay. The natural water content W = 22.5 - 30.5%, liquid limit WL = 33.5%, plastic limit WP = 21.8%.
This contract are filling roadbed subgrade, aggregate fill 370,000 cubic meters. To ensure the roadbed on time efficient, high-quality completion of the contract section I selected according to the construction specifications