Process for treating valley silt soft foundation in mountain area by explosion method

Abstract

The invention discloses a process for treating a valley silt soft foundation in a mountain area by an explosion method. The process comprises the steps as follows: firstly, according to the thickness and the basic physical mechanical parameters of silt, carrying out blasting design to obtain parameters of blasting charge quality, throwing-filling footage quantity and blasting charge buried depth; secondly, building a guide levee on a perpendicular roadbed axis, circularly constructing based on the guide levee according to the steps of throwing and filling, arranging explosives, detonating and complementally filling until the soft foundation treatment is completed; and lastly, carrying out quality detection in different periods. Compared with the traditional soft foundation treatment method, the process has the advantages of better economic property and better treatment effect, and can accelerate the construction progress at the same time. A field test shows that compared with a gravel pile method, the cost can be saved by about 15% and the working period is shortened by about 5%. In addition, the silt mixing phenomenon in the technology for treating the soft foundation by the explosion method in the absence of water is remarkably reduced and the bearing capacity is higher.

Description

technical field [0001] The invention relates to a ground treatment method in the field of construction engineering, in particular to a treatment process for muddy soft ground. Background technique [0002] In recent years, with the rapid development of my country's transportation construction, the transportation network with roads and railways as the backbone is gradually expanding and improving day by day. Due to the complex geological conditions and changing topography and landforms in my country, the expansion of transportation lines puts forward higher requirements for builders and researchers. Among them, the treatment of weak foundations in special areas is a highly challenging problem. Soft soil foundation is a distinctive representative of special soft foundation. Due to poor drainage, the soft foundation in mountainous valleys has the characteristics of thick silt layer, perennial saturation, and difficulty in supplying materials and power. It is difficult for conve...

AI Technical Summary

Problems solved by technology

[0016] The main purpose of the present invention is to solve the technical problems of mixed silt and excessive uneven settlement of the embankment after treatment caused by the existing explosive treatment technology. It provides an explosive treatment process suitable for the muddy soft foundation of mountainous valleys and valleys, and establishes the Theoretical method of accurate explosion design, this technology can avoid the problems of mixed silt and uneven settlement of embankment after treatment caused by the existing blasting treatment technology, and the economic index is superior at the same time

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