Research On Soft Ground Treatment Technology And Application In Maanshan-Chaohu Section Of North Coastal Expressway

Large diameter cast-in-place thin-walled concrete pile (hereinafter referred to as the PCC pile),double mixing pile, prefabricated concrete pipe (hereinafter referred to as PHC pile) is the presentdomestic popularization and application are more successful soft foundation treatment of newprocesses for the soft soil foundation treatment ability, treatment results is greatly enhanced, and inthe process, quality control, the detection method also have improved a lot. North coastalexpressway ma on shan to chao lake period of regional distribution of flood along the deposition softsoil, soft soil in thickness, high sensitivity, the permeability coefficient is small, consolidation speedslow, total settlement. In the bridge section and small structures slope section of the precast concretepipe pile by (PHC) and large diameter cast-in-place pile (PCC), in general DiDuan road withbi-directional mixing pile scheme. The popularization and application of composite foundationtechnique for soft soil area highway construction to bring good social benefits and economic benefits.But each foundation treatment method has a certain range of use, must adjust measures to localconditions to determine use parameters and the application method, can receive very goodapplication effect. Especially the PCC soft foundation treatment technology quality inspectionstandards far there, must according to the test results determine the construction parameters andtechnical standards.This article through to the three technology in north coastal expressway ma on shan to chaohusoft foundation treatment for the application of PHC pile, the PCC, two-way mixing pile designprinciple, into piles, working theory and technology is discussed, this paper expounds the technicalfeatures of their respective; Through the field into a pile of process test, to determine the piletechnology and construction control points and test parameters, and at the same time, confirm theconstruction parameters of two-way mixing pile, PHC pile, PCC pile the influence on the quality ofmolding, proposed the quality control standards. Solve the construction process of constructionparameters and quality inspection standards, according to pile the quality problem of the timemolding, make effective preventive measures. To PCC pile, PHC pile, two-way mixing pileconstruction site with guidance and reference.