A kind of anti-collapse polymer mud powder and its preparation method and application

Abstract

The invention discloses collapse-resistant polymer slurry powder and a preparation method thereof. The collapse-resistant polymer slurry powder is prepared from the following ingredients in parts by weight through compounding: 2.5 to 5 parts of thickening agents, 5 to 10 parts of filtrate loss reducers, 85 to 90 parts of solid phase film-forming agents, 0.05 to 0.1 part of dispersants and 0.1 to 0.2 part of lubricating agents. The collapse-resistant polymer slurry powder provided by the invention has the advantages that slurry prepared from the collapse-resistant polymer slurry powder has the advantages of good homogeneity, thin and compact mud film, low filtration loss, little settled slag, small doping quantity, many cyclic use times, no environment pollution and the like; the technical problems of diameter reduction and hole collapse of the water sensitive geological pile foundation construction are well solved; the pile foundation carrying force of a friction pile is improved by 30 percent or higher; the construction cost is greatly reduced; wide application prospects are realized.

Description

technical field [0001] The invention relates to a pile foundation wall protection mud material, which is especially suitable for preparing water-sensitive geological rotary excavation and reverse circulation process construction wall protection mud, in particular to an anti-slump polymer mud powder and its preparation method and application. Background technique [0002] As construction techniques such as rotary drilling and reverse circulation are widely used in my country's railway construction, technical problems such as diameter shrinkage and hole collapse are prone to occur in pile foundation construction in water-sensitive geology (strongly weathered rock formation and silt layer geology), which not only causes a large number of economic loss, and seriously affect the quality of construction, the promotion of advanced pile-forming technology and the safety of on-site construction personnel. The water-sensitive geological pile hole shrinkage and hole collapse are mainly ...

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Problems solved by technology

[0003] At present, CN105860942A discloses a preparation method of well wall film-forming drilling fluid. The drilling fluid has a better effect of plugging cracks in shale formations, but has poor anti-collapse effect on silt layer-like water-sensitive geology; CN104927813A discloses A method for preparing a protective anti-slump agent for drilling. The invention uses petroleum asphalt as the main anti-slump functional raw material. The developed mud product has obvious anti-slump effects for water-sensitive geology. However, due to the large environmental pollution of petroleum asphalt, it does not conform to civilized construction. requirements, so the popularization and application value is limited; CN103965842B discloses a kind of preparation method of anti-collapse drilling fluid, although this mud possesses strong ability to suppress and prevent collapse to water-sensitive geology, but this invention uses potassium chloride as the main anti-collapse and Inhibiting components, introducing a large amount of Cl - ions, there are potential hidden dangers affecting the durability of reinforced concrete pile foundation structures, which restricts its application in pile foundation drilling construction

The above inventions provide partial solutions to the technical problems of diameter shrinkage and hole collapse in the construction of water-sensitive geological pile foundations. Not enough time to fully promote the app

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