A kind of anti-seepage wall positive electric glue wall solidification mud and its application

Abstract

The invention discloses positively charged gel wall-fixing slurry of diaphragm wall and its application, and belongs to the technical field of wall fixation of diaphragm wall. The positively charged gel wall-fixing slurry is prepared from, by mass, 50-60 parts of bentonite, 1.6-2 parts of pure alkali, 0.5-1 part of caustic soda, 0.05-0.25 part of mixed metal hydroxide, and 1000 parts of water. Through adding mixed metal hydroxide in the slurry, the whole space can form a network structure connected by a polarized water chain, and form a stable system; besides, slurry shows strong dynamic cutting force and high static cutting force; thus the ability of slurry carrying and rock debris suspension is improved.

Description

technical field [0001] The invention relates to the field of anti-seepage wall fixing technology, in particular to a kind of anti-seepage wall positive glue wall fixing mud and application thereof. Background technique [0002] Wall-fixing mud technology is an important part of the construction of concrete cut-off walls, and a key technical measure to ensure the safe and smooth progress of the process of forming grooves and walls of concrete cut-off walls. With the increasingly complex formations encountered during the construction of the cutoff wall and the increasing difficulty of construction, the wall-solidifying mud technology is used to stabilize the hole wall, prevent collapse, carry and suspend drill cuttings, expand hydraulic milling, grabs, impact reverse circulation, The scope of application of excellent equipment such as gas lift reverse circulation and the improvement of work efficiency are playing an increasingly important role. [0003] At present, the disper...

AI Technical Summary

Problems solved by technology

[0005] ① Mud has poor inhibition and cannot effectively control formation hydration expansion, especially for strata with high sand content, strong permeability and loose structure, which may easily lead to collapse; ② Mud performance is unstable and anti-pollution ability is poor. , easy to be polluted by pore wall formations and calcium and magnesium ions, etc., which will damage the rheology and filter properties of the mud and lose suspension stability, making it difficult to make pores and clear pores; The proportion of 1μm submicron particles is quite high, which is unfavorable for increasing the pore-forming speed and speeding up the construction progress; ④ Due to the addition of a large amount of caustic soda and soda ash to the mud, it will have adverse effects on the natural environment

Previously, although polyacrylamide-based polymer materials were used in engineering experiments such as Shanghai, Beijing, Tianjin, and Yangtze River embankment cutoff walls, and achieved certain results, due to its high cost and limited by the depth of the slot, Constrained by construction equipment, it is difficult to adapt to the construction of deep and complex overburden layers

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