Construction method for soft soil roadbeds on two sides of bridge and culvert of road

Abstract

The invention relates to a construction method for soft soil roadbeds on two sides of a bridge and a culvert of a road. By adopting a scheme of inserting a short timber pile into a cement mixing pile,force of friction of a side wall and resistance at the pile end are provided by using a cheap cement mixing pile. As the strength and rigidity of the internally inserted short timber pile are relatively great, the short timber pile bears and transfers an upper load and transfers cement soil masses on the side wall and at the pile end in depth, so that the area acted by the load to the cement soilmasses is increased exponentially to match the cement soil masses to generate relatively great side friction and pile end resistance, so that the bearing capacity of a foundation provided by the compound pile is not lower than that of a rigid pile same in size, and the cost of the pile is only half of that of the applied rigid pile same in size. The construction method is short in period, relatively low in cost and quite obvious in economical and technical effect.

Description

technical field [0001] The invention relates to a construction method of soft soil roadbed, in particular to a construction method of soft soil roadbed on both sides of highway bridges and culverts. Background technique [0002] In highway construction in my country, due to the influence of topography, soil geology and natural climate, there are often road sections with bad geological roadbed, most of which are soft soil, expansive soil, collapsible loess and other bad geological road sections. [0003] Soft soil subgrades have the characteristics of high natural water content, large void ratio, high compressibility and low strength. Especially on the road sections on both sides of bridges and culverts, soft soil subgrades are prone to embankment instability and excessive settlement, resulting in subgrade and pavement damage. , and the phenomenon of bridge head jumping occurs. [0004] For the soft soil subgrade on both sides of bridges and culverts, special targeted techni...

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Problems solved by technology

[0006] The purpose of the present invention is to propose a construction method for soft soil roadbeds on both sides of highway bridges and culverts, using cement The construction of short wooden piles inserted in the mixing pile combines the advantages of cement mixing piles and short wooden piles, which not only reduces the length of cement mixing piles, but also enhances the strength of the pile body, so as to effectively improve the bearing capacity of the composite foundation

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