Construction method for soft soil roadbed high fill steep slop road foam light soil

Abstract

The invention discloses a construction method for soft soil roadbed high fill steep slop road foam light soil. The construction method for the soft soil roadbed high fill steep slop road foam light soil comprises the following steps of (1) excavation of a base; (2) construction of a pouring area, a pouring layer and a settlement joint: pouring a full-line foam light soil roadbed in a sectional, zoned and comprehensively layered manner; (3) laying requirements of a geomembrane and a geonet: the top of the foam light soil roadbed is sprayed with water or covered for curing in 7 days after beingpoured; and then the impermeable geomembance is laid on the top of the foam light soil roadbed; the impermeable geomembance at the top of the foam light soil roadbed is laid above a metal net; duringlaying, the splicing adopts a hot weld method; the splicing width is 5 cm; before laying, one layer of non-woven needle-punched geotechnical cloth is laid first as a pad; during laying, the non-wovenneedle-punched geotechnical cloth is flattened and tightened and then anchored by using a U-shaped nail; and the adjacent width of geomembance is overlaid and spliced on the impermeable geomembance; and (4) pouring of the light soil. According to the construction method for the soft soil roadbed high fill steep slop road foam light soil, the settlement caused by additional load in widened roadbedfilling can be reduced, the settlement between new and old roadbeds is eliminated, longitudinal cracks of a road surface are prevented, and broad market promotion values are realized.

Description

【Technical field】

[0001] The invention belongs to the field of road surface construction, and in particular relates to a construction method of foam light soil in a high filling steep slope road section of a soft soil roadbed. 【Background technique】

[0002] With the rapid development of my country's economy and the increasing traffic volume, the construction quality of highway engineering and urban road engineering has attracted much attention. During the construction, there will be problems such as the failure of normal grading and widening of the road sections along the river, ponds and soft soil, the poor stability of the subgrade in the high fill section of the soft soil subgrade, and the differential settlement of the subgrade, which will affect the use of the road surface. We use lightweight foam soil for filling. The use of foam lightweight soil in road filling construction has the following functions:

[0003] (1) It can be filled vertically to reduce land use; ...