Light filled structure and its construction process

Abstract

The light fill body structure includes soil layers and foamed plastic block layers superposed alternately. In all the foamed plastic block layers, there are drilled soil column holes. There are also concrete layer over the top foamed plastic block layer, bottom crushed stone layer below the lowest foamed plastic block layer, and retaining wall to the sides of the fill body structure. The present invention is easy to construct, and has density lower than common soil, adjustable strength, light pressure to soil, and less deposit and side flow. The present invention makes it possible to refill soil vertically.

Description

Technical field [0001] The invention relates to a light filling soil structure and a construction method for highway engineering, tunnel engineering, bridge engineering and the like. Background technique [0002] At present, various drainage consolidation methods (including overload preloading method, vacuum preloading method, and heap preloading method) are basically used in the treatment of soft foundations of expressways in China to promote settlement and improve the bearing capacity of soft foundations. For the deep and thick soft foundation distributed in the Pearl River Delta and the Yangtze River Delta, methods such as construction of plastic drainage boards, bagged manholes, and then preloading can be used; these methods can basically control the main consolidation settlement within the construction period. Due to the soft clay Creep properties cause sub-consolidation settlement. Although this settlement is not a large proportion in the total settlement, it generally...

AI Technical Summary

Problems solved by technology

In order to shorten the construction period and reduce post-construction settlement, the overload preloading method is often used, but this method not only increases the construction cost, but also cannot fundamentally eliminate the occurrence of post-construction settlement; in addition, fly ash is also used to build railway subgrades. However, because the bulk density of fly ash soil is still relatively large, it cannot be used as an auxiliary method for soft foundation treatment; there are also some plastic particles mixed with soil. At the bridgehead of a highway in Jiangsu, light wall brick factory scraps were used as There have also been examples of applying ultra-light material EPS to bridgehead filling, but EPS is an expensive chemical material, which is not only expensive, but also needs to be processed for filling EPS. construction waste soil, and the bulk density of this material (0.016~0.03t / m 3 ) is too small, we must consider the stability problems caused by the buoyancy of water, etc.

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