Soft base processing method

Abstract

The invention relates to a method for adopting long plastic drainage plate (or sand drain) and short cement-soil mixing pile in connection to deal with highway soft foundation (abbr. a long plate-short pile working method, or called a D-M working method). Compared with the single prepressing drainage method, such method has the advantages of effectively raising the stability of foundation effectively and accelerating the construction of road embankment owing to the existence of a short pile, thus shortening the constructing period correspondingly. Compared with a single deep mixing pile, the method can accelerate the consolidation settlement of deep soft soil owing to the existence of a long plate; therefore, the settlement after working is controlled in a certain range; besides, the coordination of settlement speed rates among different sections becomes possible by adjusting the space, the length and the prepressing style between the pile and the plate.

Description

technical field

[0001] The invention relates to the field of highway roadbed construction engineering, in particular to a processing method for expressway soft roadbeds. Background technique

[0002] Expressway is a large linear structure, which has strict requirements on post-construction settlement and settlement difference of different road sections. Expressways generally cross different landform units, and will encounter various foundation conditions along the line. Deep soft soil strata are widely developed in the Yangtze River Delta, Pearl River Delta and other coastal areas of my country. Due to the high embankment and heavy load, the reinforcement treatment of these deep soft soil foundations is one of the technical difficulties in the construction of roads or expressways in soft soil areas.

[0003] During the construction of expressways in our country, according to years of construction experience, a set of soft soil foundation treatment technology system suitable...

Images