Cleaning method of underground anchor rod during underground diaphragm walls construction

Abstract

The invention relates to a cleaning method of underground anchor rods during underground diaphragm walls construction. The cleaning method comprises the following steps of: defining grooving construction ranges of the underground diaphragm walls, determining shearing parameters, adding tungsten-welded steel sheets to two sides of the side plate of a hydraulic crab bucket of a hydraulic grooving machine, tying to shear, carrying out actual operation according to predefined operation range from middle to two sides, and gradually destroying the underground multiple-layer anchor rods; sequentially and symmetrically carrying out the shearing operation of the anchor rods at two sides after the anchor rod of the upper layer is sheared, destroying the anchor rod of the lower layer after the influencing anchor rods of the groove section and the adjacent groove sections are confirmed to be completely eliminated, repeating the process until each layer of anchor rod necessary for cleaning is completely eliminated, then cleaning bottom of hole at the upside, carrying out the construction on the earthwork of the lower layer according to the method from two sides to middle and grooving, testing by ultrasonic waves without errors, and carrying out subsequent construction process of the underground diaphragm walls. In the invention, after soils are borrowed, rubbles are unnecessarily backfilled, and the soil cement is unnecessarily backfilled to carry out the secondary grooving operation. By adopting the invention, groove can be formed quickly and efficiently, the wall formation effects are favorable, the cost is low and the economic benefit is high.

Description

technical field [0001] The invention relates to a method for cleaning underground anchor rods encountered during groove-forming construction of an underground continuous wall, in particular to a cleaning method for multi-layer anchor rods. Background technique [0002] There are more and more cases of underground anchor rods encountered in the construction of underground diaphragm walls adjacent to existing buildings, and the cleaning of multi-layer anchor rods is a complicated construction problem. In the past, one of the solutions was to backfill gravel first and then erect impact drill punching bolts, which greatly disturbed the soil of the underground diaphragm wall groove wall and required a large amount of backfill cement soil for secondary groove formation operations; the other The method is that when the number of bolt layers is small and shallow, large-scale excavation is adopted, and cement soil is backfilled after breaking the bolts, and the second trenching opera...

AI Technical Summary

Problems solved by technology

In the past, one of the solutions was to backfill gravel first and then erect impact drill punching bolts, which greatly disturbed the soil of the underground diaphragm wall groove wall and required a large amount of backfill cement soil for secondary groove formation operations; the other The method is that when the number of bolt layers is small and shallow, large-scale excavation is adopted, and cement soil is backfilled after breaking the bolts, and the second trenching operation is carried out, which increases construction investment and affects the smooth progress of construction progress.

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