Synchronous blast-enlarging treatment method for liquified soil foundation of highway

Abstract

This invention relates to synchronous explosion extending method for liquefied foundation of high way. Said method contains distributing explosion extending holes and drainage ditch along road, the hole is filled with explosive, burster and explosive loading pipe for sealing hole, the top of each hole excavated with stone filling pit having volume greater than that of explosion extending cavity, the explosion extending is operated in two time delay. Said invention both forms explosion extending cavity and explosion stone filling with fine water charge and effectively solidifying explosion soil body, greatly reduces the adverse effect to around environment.

Description

1. Technical field [0001] The invention relates to a synchronous explosive expansion treatment method for expressway liquefied soil foundation, and is especially suitable for reinforcement treatment of soil body with large thickness and high liquefaction level. 2. Background technology [0002] Liquefied soil foundations are widely distributed in the alluvial areas of the Yellow River in my country. In recent years, the scale of expressway construction in my country has become larger and larger. Some expressways have to be built on liquefied soil foundations. However, due to the low bearing capacity of liquefied soil foundations, earthquakes and earthquakes Liquefaction will occur when the load acts, so reinforcement treatment must be carried out to improve its bearing capacity and eliminate the hazards of liquefied soil foundation earthquake liquefaction to expressways. In my country, the traditional reinforcement treatment of liquefied soil foundation mainly adopts methods ...

AI Technical Summary

Problems solved by technology

Through the pile forming process of vibratory compaction, the original foundation soil is compacted to produce replacement, drainage and consolidation, so that the pile body and the soil between the piles form a composite foundation, so as to eliminate the liquefaction of liquefied soil, enhance the strength of foundation soil, and accelerate Consolidate the settlement and improve the overall stability of the foundation. The liquefiable soil foundation at the bridge head and structure of the expressway is often treated with dry vibration compacted gravel piles. The treatment effect is good, but the treatment cost is high; the drainage consolidation method is passed Exclude the pore water in the liquefied soil foundation to cause the soil to consolidate and settle, so as to eliminate the liquefaction of the liquefied soil and enhance its strength. However, in order to increase the drainage speed, it is necessary to construct vertical drainage channels and surcharge preloading, and the drainage consolidation method is used for treatment Although the cost is low, but the treatment period is long, it is suitable for the treatment of shallow buried expressway liquefied soil foundation

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