A design method of mix ratio of seawater slurry with stable retaining performance

Abstract

The invention provides a mix proportion design method of seawater slurry with stable wall retaining property. The method comprises the following steps: I, selecting a raw material, II, designing a three-factor five-level orthogonal test scheme, III, preparing 25 groups of seawater slurry, IV, testing the specific gravity, the viscosity, the power of hydrogen, the water loss rate and the slurry surface thickness of each group of the seawater slurry, V, analyzing the testing result, and confirming the optimal factor and level combination, thereby obtaining an optimal mix proportion of the seawater slurry with the stable wall retaining property. Compared with the prior art, through selection on raw materials and design of the mix proportion, the method achieves the purpose of improving the stability of the seawater slurry, especially the wall retaining property of the seawater slurry. In addition, by optimizing indexes such as the specific gravity, viscosity, pH value, water loss rate and slurry surface thickness of the seawater slurry, the collapse of porous walls and the seepage of underground water are effectively prevented, and the wall retaining property of the seawater slurry is remarkably stable.

Description

technical field [0001] The invention belongs to the technical field of bored cast-in-place pile mud for offshore bridge pile foundations, and in particular relates to a design method of seawater mud with stable retaining performance. Background technique [0002] At present, more and more cross-sea bridges are being built in our country. Pile foundation drilling construction in marine environment needs to prepare a large amount of mud. High-quality mud is the key factor to ensure the quality of pile foundation. Limitations: (1) During the storage and transportation of fresh water, it is limited by the site and transportation capacity, which affects the construction progress and increases the construction cost; (2) The mud prepared with fresh water will still be polluted by seawater, which will affect the mud (3) A large amount of fresh water needs to be supplied in the process of preparing mud from fresh water, which will greatly reduce the construction efficiency and increa...

AI Technical Summary

Problems solved by technology

[0002] At present, more and more cross-sea bridges are being built in our country. Pile foundation drilling construction in marine environment needs to prepare a large amount of mud. High-quality mud is the key factor to ensure the quality of pile foundation. Limitations: (1) During the storage and transportation of fresh water, it is limited by the site and transportation capacity, which affects the construction progress and increases the construction cost; (2) The mud prepared with fresh water will still be polluted by seawater, which will affect the mud (3) A large amount of fresh water needs to be supplied in the process of preparing mud from fresh water, which will greatly reduce the construction efficiency and increase the construction cost

[0005] Generally speaking, the design method of fresh water slurry mix ratio is time-consuming, laborious, and large investment. Seawater slurry has the advantages of local materials and no need for special slurry-making equipment. The disadvantages of poor performance of the retaining wall

Therefore, it is urgent to overcome the above-mentioned poor performance stability of mud, especially the shortcoming of poor retaining wall performance, and provide a method for designing the mixing ratio of ebb tide sea mud with stable retaining wall performance

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