Anchor cable construction method in high-water-pressure soil layer support engineering in loess area

Abstract

The invention discloses an anchor cable construction method in high-water-pressure soil layer support engineering in a loess area. The anchor cable construction method comprises the following steps of S1, construction preparation, S2, primary drilling, S3, primary grouting, S4, secondary drilling, S5, anchor cable installation, S6, anchor hole grouting, and S7, waist rail construction. According to the anchor cable construction method in the high-water-pressure soil layer support engineering in the loess area, an anchor cable is fixed in a high-water-pressure soil layer through a mode of multiple times of drilling and multiple times of grouting, and the firmness of the anchor cable during fixing can be enhanced; in the grouting process, grout can be poured from outside to inside and is matched with a separation sleeve, so that the solidification effect of the concrete grout on the inner layer is better, and internal and external separation is formed, so that the concrete grout on the inner layer does not interfere with the concrete grout on the inner layer; and in the internal filling process, the solidification effect is good, the protection effect of the anchor cable in use is effectively improved, meanwhile, the safety coefficient of the support engineering is increased, and the quality of the subsequent anchor cable during installation and the internal supporting effect are guaranteed.

Description

technical field [0001] The invention belongs to the technical field of foundation pit support, and in particular relates to an anchor cable construction method in high water pressure soil layer support engineering in loess areas. Background technique [0002] In recent years, with the rapid development of my country's infrastructure construction, more and more slope projects will be involved in projects such as expressways, industrial and civil buildings, urban rail transit, large public facilities, and stadiums. Maintenance has become an important and difficult point of project quality and safety. In the deep foundation pit slope support engineering, the support form of pile plus prestressed anchor cable or composite soil nail wall with prestressed anchor cable is often used. [0003] Anchor cable support plays an important role in the slope support process of foundation pit excavation because of its large anchoring radius, strong anchoring force, and wide reinforcement ran...

AI Technical Summary

Problems solved by technology

The anchor cable technology currently used in the support engineering of high water pressure soil layers in loess areas generally needs to drill holes to form anchor cable holes before installing the anchor cables, and place the anchor cables in the anchor cable holes, but the existing construction methods, As a result, the stability of the anchor cable is poor during installation, and the effect of grout solidification is poor, especially in the soil layer rich in moisture. When the grout is formed, the strength and speed of the forming are affected.