Expressway pile wall type composite roadbed and construction method thereof

Abstract

The invention discloses an expressway pile wall type composite roadbed and a construction method thereof. The roadbed comprises a plurality of reinforcing layers, and a hard shell layer which is laidat the tops of the reinforcing layers; corresponding reinforcing soil layers in the plurality of reinforcing layers are adopted to form a plurality of spaced reinforcing pile wall structures, and a mixed soil pile wall structure is formed between every two adjacent reinforcing pile wall structures; the construction method comprises the steps that 1, determining basic parameters of the expressway pile wall type composite roadbed; 2, paving the reinforcing layers; 3, forming the plurality of reinforcing layers; and 4, paving the hard shell layer. A plurality of spaced reinforcing pile wall structures are formed by the corresponding reinforcing soil layers in the reinforcing layers which are laid layer by layer; the reinforcing pile wall structures and the mixed soil pile wall structures aremutually clamped, the structure is stable, vehicle wheel loads are transmitted into the reinforcing pile wall structures through the hard shell layer and then transmitted into a rock-soil body throughthe reinforcing pile wall structures, the land occupation problem caused by large-area sloping due to roadbed filling is avoided, the cost and the occupied area are greatly reduced, and the construction effect is good.

Description

technical field [0001] The invention belongs to the technical field of expressway composite roadbed, and in particular relates to a highway pile-wall composite roadbed and a construction method thereof. Background technique [0002] In recent years, with the rapid growth of expressway traffic volume, the problem of new construction and reconstruction and expansion of expressways is particularly prominent. The filling of new expressways generally adopts horizontal layered filling technology, which is expensive, has a long construction period, and is high-speed. The land occupation problem caused by large-scale grading caused by roadbed filling is serious; in addition, some expressways built in the early stage have reached or exceeded the design capacity, and these roads are facing the problem of expansion and widening. The filling process of the rebuilt and extended expressway is generally made of horizontal layered filling technology, which is expensive and because the degre...

AI Technical Summary

Problems solved by technology

[0002] In recent years, with the rapid growth of expressway traffic volume, the problem of new construction and reconstruction and expansion of expressways is particularly prominent. The filling of new expressways generally adopts horizontal layered filling technology, which is expensive, has a long construction period, and is high-speed. The land occupation problem caused by the large-scale grading caused by roadbed filling is serious; in addition, some expressways built in the early stage have reached or exceeded the design capacity, and these roads are facing the problem of expansion and widening

The filling process of the rebuilt and extended expressway is generally made of horizontal layered filling technology, which is expensive and because the degree of consolidation of the old and new roadbeds is different, the expansion of the roadbed by this method is likely to cause differential settlement of the old and new roadbeds, making the combination of the old and new roadbeds difficult. Cracks in some parts of the road surface will cause the overall collapse of the new roadbed in severe cases

In addition, the settlement of the newly filled roadbed will also cause the joint settlement of the old roadbed, which will cause deformation of the old roadbed and cracks on the surface

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