Handling method for diaphragm wall slotted hole cement grout leakage

Abstract

The invention provides a handling method for diaphragm wall slotted hole slurry leakage. The method comprises the steps that (1) neat cement grout is poured into a slotted hole to reach an aperture; (2) a percussion drill conducts drilling; (3) after the surface of the neat cement grout in the slotted hole descends to the hole bottom, cement mortar is poured into the hole to reach the aperture; (4) the percussion drill is continuously adopted for drilling, and the cement mortar and the cement grout form a stone body surrounding the hole wall; (5) in the drilling process conducted in the step (4), when the surface of the cement mortar in the slotted hole descends, cement mortar is continuously supplemented into the hole; (6) when the cement mortar inside the slotted hole approximately reaches initial setting, the cement mortar inside the hole is replaced with drilling mud; (7) after setting is kept for 24 to 48 hours, diaphragm wall slotted hole slurry leakage handling is completed. The handling method for diaphragm wall slotted hole slurry leakage can solve the problem that slotted hole slurry leakage of a deep and thick covering layer diaphragm wall which is low in underground water level, loose in structure and seriously overhead is difficult to handle, and is good in leakage blocking effect and easy to implement.

Description

technical field [0001] The invention relates to a treatment method for grout leakage in slot holes, in particular to a treatment method for grout leakage in slot holes of deep overburden anti-seepage walls with low groundwater level, loose structure and serious overhead. Background technique [0002] When the percussion drilling rig is used to construct the anti-seepage wall in the deep overburden layer with low groundwater level, loose structure and severe overhang, serious slurry leakage accidents often occur in slot holes. If it is not treated in time, it will cause large-scale collapse of the slot. The traditional plugging methods mainly include: (1) supplementing the hole with low-density, high-viscosity high-quality mud for plugging; (2) backfilling the hole with clay, gravel and other materials to repeatedly create holes for plugging. Due to the low groundwater level in the deep overburden layer, the pressure of the slurry column at the bottom of the slot hole is rel...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a treatment method for grout leakage in cut-off wall slots, which can solve the problem that it is difficult to deal with the grout leakage in cut-off wall slots with low groundwater level, loose structure and serious overhead. Good leakage effect, simple and easy

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