Subgrade filling method for widening road in immersed road section

• Main Authors: WANG YING, YUAN LONG, LIU HONGHUI, LI XIAOJUAN, ZHOU JUN, ZHANG YONG, FENG YURONG, HAN WEIWEI, WANG XU, LI YAOLONG, FAN JIANXING, TU BIN, ZHAO HAISEN
• Format: Patent
• Language: Chinese; English
• Published: 18.03.2022
• Subjects: CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES; CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, ORTHE LIKE; EMBANKMENTS; EXCAVATIONS; FIXED CONSTRUCTIONS; FOUNDATIONS; HYDRAULIC ENGINEERING; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR; SOIL SHIFTING; UNDERGROUND OR UNDERWATER STRUCTURES

The invention discloses a subgrade filling method for widening a road in an immersed road section, which comprises the following steps of: excavating a foundation pit on the outer side of an original subgrade slope of a road needing to be expanded, and installing an anti-seepage concrete baffle wall on the outer side of the foundation pit; a construction waste recycled aggregate cushion layer is laid at the bottom of the foundation pit; the original roadbed slope of the road needing to be expanded is subjected to step digging treatment, and then a step surface is formed; foam light soil is poured on the construction waste recycled aggregate cushion layer between the impermeable concrete baffle wall and the step surface, and a new roadbed is formed after the foam light soil is solidified. The structure is simple, the treatment target is clear, and the problems of large occupied area, differential settlement and high construction difficulty during road widening roadbed filling of the immersed road section can b