Construction method for road reconstruction with pavement subsidence

Abstract

Provided is a construction method for road reconstruction with pavement subsidence, which can significantly reduce construction costs while satisfying the requirement for road surface subsidence that does not occur significantly after the use of a reconstructed road for a long period of time. The method comprises the following steps: a) forming a plurality of pile holes (10) in a settlement area of a road; b) forming a branch cavity and / or a disk cavity (11) in the pile hole (10) in an extrusion manner; c) extruding the surrounding soil body (3) in the transverse direction at an elevation position near the position of the subgrade soil bottom surface in the pile hole (10) to form a pile top soil supporting structure body cavity (12) for the pile top soil supporting structure body (8), which protrudes outwards by taking the pile hole (10) as the center; d) pouring concrete (14) into the pile bore (10) to form a concrete pile (4) with a support (5) and / or a disk (16), and e) pouring concrete (15) into the pile-jacking soil structure body cavity (12) to form a pile-jacking soil structure body (8).

Description

Technical field[0001]The present invention relates to the construction method of the present invention relates to the transformation of the old road.Background technique[0002]In the past, my country's road, especially the highway was often built on the soft soil base. Due to the construction process, the construction process is not limited, or the quality is not high, and the construction of the road will often occur in the road settlement. Finally, the road is collapsed. In response to the path of collapse of such a road, the construction method of conventional road transformation includes the construction method of the road transformation of the roadbed and the construction method of the road transformation of the rigid pile and the road transformation of rigid piles. In the construction method of the road transformation of the soil of the soft soil, the road transformation of the soil of the soft soil is reinforced, and a plurality of minute holes are opened, and the micropores a...

AI Technical Summary

Problems solved by technology

In the road reconstruction construction method of strengthening the soil of the soft soil foundation by cement mixing, a plurality of microscopic holes are opened in the area where the subsidence of the road surface occurs in the road surface, and through the microscopic holes, with the aid of cement mixing equipment, the The soft soil foundation soil under the subgrade is reinforced. The advantage of this construction method is that it is not necessary to destroy the road surface in a large area, and it is not necessary to excavate the subgrade in a large area, and the construction cost is low. The disadvantage of this construction method is the reinforcement of the soft soil foundation soil. The effect is limited, and the pavement will still collapse after the renovation

as passed Figure 13 As shown in the cross-sectional view of the road reconstructed by the construction method of road surface settlement reconstruction in the prior art, in the construction method of road reconstruction using ordinary rigid piles for reinforcement, the subgrade soil of the road surface 1 In the soft soil foundation soil 2 below the 3, a plurality of ordinary rigid piles 4 are arranged, and cap beams 9 are arranged on the tops of the plurality of ordinary rigid piles 4, and the subgrade soil 3 is supported by the cap beams 9. The construction method The advantage of this method is that it effectively solves the problem of subsidence of the road surface 1 after road reconstruction and use, and the reinforcement effect of the soft soil foundation soil 2 below the roadbed soil 3 is better. At the top of the top, a cap beam 9 is set to support the subgrade soil 3, so a pile 4 with a larger diameter and a longer length must be used. The pile bottom of the pile 4 is generally required to extend into the bearing layer 7, and a large area must be used. Excavate the road surface 1 and roadbed soil 3, so the construction cost is relatively high

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