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A platform for research: civil engineering, architecture and urbanism
Material selecting method for weak expansive soil roadbed construction
The invention relates to the technical field of constructional engineering, and particularly relates to a material selecting method for weak expansive soil roadbed construction, and aims to solve theproblem of filling by changing filling soil due to waste of expansive soil. The material selecting method is technically characterized by comprising the steps of S1, collecting a soil sample; S2, selecting quicklime lump lime, and sprinkling water according to a ratio of quicklime to water of 3: 1 to carry out digestion at a fixed point; S3, selecting at least five different lime dosages, carryingout curve analysis on the liquid limit, the plasticity index, the free expansion rate, the strength index and the density of the weak expansive soil doped with different lime dosages, analyzing and verifying the influence rule of lime on each index, determining the maximum dry density and the optimal moisture content under each lime dosage condition through a compaction test, and carrying out a CBR test on the test piece under the optimal moisture content condition of each lime dosage; and S4, conducting weak expansive soil lime mixing and stirring according to the optimal lime dosage ratio for multiple time by adopting an excavator in the soil taking field.
本申请涉及建筑工程技术领域，具体涉及一种用于弱膨胀土路基施工的选料方法，旨在解决由于膨胀土废弃而采用换填土填筑的问题，其技术要点在于包括以下步骤：S1、采土样；S2、选用生石灰块灰，以生石灰：水＝3：1的比例洒水定点进行消解；S3、选取至少5个不同灰剂量，通过对掺入不同石灰剂量的弱膨胀土的液限、塑性指数、自由膨胀率、强度指标、密度进行曲线分析，分析并验证石灰对各项指标的影响规律，在通过击实试验，确定各灰剂量条件下的最大干密度和最佳含水率，在各自灰剂量的最佳含水率条件下，进行试件的CBR试验；S4、在取土场采用挖机多次按照灰剂量最佳配比进行弱膨胀土掺灰翻拌。
Material selecting method for weak expansive soil roadbed construction
The invention relates to the technical field of constructional engineering, and particularly relates to a material selecting method for weak expansive soil roadbed construction, and aims to solve theproblem of filling by changing filling soil due to waste of expansive soil. The material selecting method is technically characterized by comprising the steps of S1, collecting a soil sample; S2, selecting quicklime lump lime, and sprinkling water according to a ratio of quicklime to water of 3: 1 to carry out digestion at a fixed point; S3, selecting at least five different lime dosages, carryingout curve analysis on the liquid limit, the plasticity index, the free expansion rate, the strength index and the density of the weak expansive soil doped with different lime dosages, analyzing and verifying the influence rule of lime on each index, determining the maximum dry density and the optimal moisture content under each lime dosage condition through a compaction test, and carrying out a CBR test on the test piece under the optimal moisture content condition of each lime dosage; and S4, conducting weak expansive soil lime mixing and stirring according to the optimal lime dosage ratio for multiple time by adopting an excavator in the soil taking field.
本申请涉及建筑工程技术领域，具体涉及一种用于弱膨胀土路基施工的选料方法，旨在解决由于膨胀土废弃而采用换填土填筑的问题，其技术要点在于包括以下步骤：S1、采土样；S2、选用生石灰块灰，以生石灰：水＝3：1的比例洒水定点进行消解；S3、选取至少5个不同灰剂量，通过对掺入不同石灰剂量的弱膨胀土的液限、塑性指数、自由膨胀率、强度指标、密度进行曲线分析，分析并验证石灰对各项指标的影响规律，在通过击实试验，确定各灰剂量条件下的最大干密度和最佳含水率，在各自灰剂量的最佳含水率条件下，进行试件的CBR试验；S4、在取土场采用挖机多次按照灰剂量最佳配比进行弱膨胀土掺灰翻拌。
Material selecting method for weak expansive soil roadbed construction
一种用于弱膨胀土路基施工的选料方法
LIU DAYONG (author) / YANG XINGBAO (author) / DU BIDAN (author) / LI ZHIQIANG (author) / LIU HONGLIN (author)
2020-11-06
Patent
Electronic Resource
Chinese
IPC:
E01C
Bau von Straßen, Sportplätzen oder dgl., Decken dafür
,
CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE
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