Method for constructing highly plastic clay core wall

Abstract

The invention relates to a method for constructing a highly plastic clay core wall, belonging to methods for constructing novel dams at areas which are rich in water resources and soil materials and are suitable for constructing the dams by the local materials. The method includes the following steps: (1) clearing filling bedding surfaces; (2) laying highly plastic clay belts on the filling bedding surfaces, and laying gravel and soil core walls among the highly plastic clay belts; and (3) rolling and compacting the highly plastic clay belts and the gravel and soil core walls. The method is suitable for using the highly plastic clay to construct the gravel and soil core walls of anti-seepage bodies of the dams, and the dams which are constructed by the method through filling can meet the requirements of designed functions and the requirement on deformation.

Description

(1) Technical field: [0001] A construction method for a high plastic clay core wall, which is mainly used in areas with underdeveloped domestic traffic conditions, harsh construction environment and weather conditions, rich water resources, and abundant soil materials, which are suitable for building local material dams Emerging dam-type construction methods. (two) background technology: [0002] The gravel soil core dam is the first 100-level rockfill high dam constructed in China, and its anti-seepage body is composed of gravel soil and high plasticity clay. High plasticity clay is clay with low liquid limit. After taking multiple precipitation measures, the water content is still much higher than the design requirement, and the actual filling water content is 24% to 29%. There is no direct similar filling experience in China. The "thin-layer light rolling" rolling test is used first, that is, the laying thickness of high-plastic clay is 15cm-20cm, and the weight of rolli...

AI Technical Summary

Problems solved by technology

There is no direct similar filling experience in China. The "thin-layer light rolling" rolling test is used first, that is, the laying thickness of high-plastic clay is 15cm-20cm, and the weight of rolling is about 14 tons. High, surface shear accompanied by deep shear, compaction is not strong, can not meet the design requirements

Moreover, in the process of plowing, crushing, and tumbling, the permeable capillary pores of the high-plastic clay were destroyed, and the design requirements could not be met at all. The prepared materials were all dry and hard blocks that were dry on the outside and wet on the inside. After more than one month of preparation work, The preparations are all waste materials, which cannot meet the construction performance and the design and use of its plastic function.

Images