3results about How to "Improve wall effect" patented technology

This invention belongs to the field of engineering machinery technology and relates to a construction method for a variable-diameter drilling and reaming integrated pile driver. It solves the problem that existing drilling and reaming integrated pile drivers cannot change diameter. The construction method is based on a variable-diameter drilling and reaming integrated pile driver, which includes an active pipe, a driven pipe, an upper wing plate seat, a lower wing plate seat, and a reaming arm. The reaming arm is formed by connecting an upper wing plate and a lower wing plate. The upper wing plate is formed by connecting an upper wing plate and an upper wing plate link, and the lower wing plate is formed by connecting a lower wing plate and a lower wing plate link. The construction method determines the length of the reaming arm to be connected by adjusting the position of the upper wing plate seat on the gear key and the position of the lower wing plate seat on the driven pipe. Then, it adaptively adjusts the number of wing plate link connections. Through the coordinated cooperation between the components, it achieves reaming operations for different pile diameters, angles, and sizes, which is simple, convenient, and greatly improves construction efficiency.

The present application relates to a kind of new type of wall protection mud material for ultra-deep underground continuous wall and its preparation method, comprising the following steps: pour mixing water into the first container, while adding bentonite, the first container is stirred to be uniformly dispersed;Sodium carbonate, sodium carboxymethyl cellulose, xanthan gum and silicone acrylic emulsion are mixed and added to mixing water and poured into the second container, and stirred to be fully hydrated;Mix the solution in the first container and the second container, stir to be fully mixed, complete mud preparation.The beneficial effects of the present application are: it can avoid the hidden troubles such as excessive lateral earth pressure, large amount of mud loss, thin and dense mud skin cannot be formed when the excavation depth of underground continuous wall is large, configure a new type of modified bentonite wall protection mud with suitable physical stability and chemical stability, appropriate relative density, good mud skin forming property, which can adapt to the working condition of ultra-deep underground continuous wall, avoid the occurrence of hole collapse and shrinkage phenomenon, so as to ensure the quality of slotting and construction safety.

The invention discloses a slurry system suitable for complex rock stratum drilling and a preparation method and application thereof, the slurry system is composed of bentonite slurry and rock slag, and 23-41 g of rock slag is added into every 100 mL of bentonite slurry; the bentonite slurry is prepared from the following raw materials in parts by weight: 1 to 8 parts of bentonite, 0.03 to 0.32 part of sodium carbonate, 0.1 to 1 part of filtrate reducer, 0.1 to 0.5 part of coating inhibitor, 0.10 to 0.15 part of viscosity reducer and 100 parts of water. The raw material components are uniformly mixed and stirred, and an alkali solution is added to adjust the pH value to be neutral or alkalescent, so that the slurry system suitable for complex rock stratum drilling can be prepared. The slurry system can be used for preparing drilling fluid for complex rock stratum drilling in the Ordos region and the like. The problems that in the existing complex rock stratum drilling process, the rock slag amount is large, the inferior solid phase invasion concentration in mud is high, and the rheological property, the filter loss and the mud cake quality are difficult to control can be solved.