Rolling earth-rock dam construction method

Abstract

The invention discloses a rolled earth-stone dam construction method. The contents of the method comprises: 1), building a dam body with fresh hard rocks, namely delivering rocks excavated on site to the dam and stacking the rocks layer by layer; 2), controlling the porosity of the construction layers of the dam body, and making sure that a stone material contains crushed stone and fine stuff the content of which is no more than 30 percent; 3), controlling the content of mud and making sure the content of a power material with a diameter less than 0.075mm is no more than 5 percent; 4), controlling the thickness of each layer; 5), controlling rolling times; 6), controlling the humidity of the construction layers. Each layer is 400 millimeters thick when rolled and constructed by a 30 ton caterpillar excavator and 600 millimeters thick when rolled and compacted by a 40 ton caterpillar excavator and is rolled for 3 to 5 times. The humidity of the construction layers is controlled between13 and 15 percent. The method uses large excavators on site rather than special rolling machine to carry out rolling operation and greatly improves the construction efficiency and economic benefits.

Description

Technical field [0001] The invention relates to a construction method of an earth-rock dam. Background technique [0002] Rolled earth-rock dams have been widely used in water conservancy and hydropower projects and industrial and mining tailings ponds. Red mud yards and ash slag yards in the aluminum industry are one of the tailings ponds. Rolled earth-rock dam refers to a type of dam built by rolling soil, sand and stone materials in layers with rolling machines. The main quality standard for rolling and filling is the dry density of the dam body that meets the design requirements; The rolling machine tools are generally rolled with sheep's feet or vibrating. [0003] Existing roller compacted earth-rock dam construction methods: building a roller compacted earth-rock dam involves excavation, transportation, stacking, compaction and other operations. Excavators are often used for excavation and stacking, and special compaction is used for compaction. Machinery, such as sheep's ...

AI Technical Summary

Problems solved by technology

The purchase of special rolling equipment and the low utilization rate of rolling equipment during the dam building process lead to increased project costs and slow construction speed, resulting in poor economic benefits