Construction method for widening road in rapid erection manner

Abstract

The invention discloses a construction method for widening a road in a rapid erection manner. The construction method comprises the following steps: excavating a foundation pit, excavating steps, removing an original protection project, cutting the slope of the existing side slope roadbed, excavating stairs, mounting a protecting wall which is vertical to an original road in a side slope or at the bottom of the side slope, zoning the roadbed and mounting formworks, preparing cast-in-place foam light weight soil, pouring the foam light weight soil layer by layer from bottom to top to a height of design requirements, covering a plastic film on the surface of the foam light weight soil for preserving moisture and curing after the pouring is completed, and removing the formworks. According to the construction method disclosed by the invention, the characteristics of good construction property, good light weight property, good independence after solidification, and the like of the cast-in-place foam light weight soil are used, the road is rapidly widened in an erection manner, the purposes of eliminating the differential settlement of new and old roadbeds of spliced road segments, improving the stability of the roadbeds, saving the land, reducing the quantity of removal and reducing the comprehensive building cost are achieved, the construction process is simple, the construction method is rapid, simple and convenient, and the construction period is shortened.

Description

technical field [0001] The invention relates to a construction method for rapid vertical widening of roads in the field of civil road widening, in particular to a construction method for rapid vertical widening of roads with cast-in-place foam light soil. Background technique [0002] Since the reform and opening up, my country's economy has developed rapidly, the country's economic strength has grown significantly, and its international status has continued to improve. my country will continue to advance towards the goal of building a modern country. [0003] With the rapid increase of urban population and the improvement of people's living standards, family cars have entered the families of ordinary citizens. According to Xinhua News Agency, as of December 2, 2013, the number of private cars in my country reached 85.07 million, a 13-fold increase from 2003, accounting for 82.8% of the total number of passenger cars. By 2013, 29 cities across the country had more than one ...

AI Technical Summary

Problems solved by technology

[0007] ①Land acquisition and demolition are often accompanied by a large number of disputes, which not only delay the construction period, but also pay high compensation for land acquisition, and the cost of demolition is high

[0008] ②National land resources are precious, and land acquisition and demolition do not conform to the green development path and the goal of building a resource-saving society, wasting land resources

[0009] ③ Conventional process construction will have a great impact on the pipeline, and coordination is very difficult

[0010] ④ It is very difficult to construct when the junction of new and old roads is spliced, and the uneven settlement of the old and new roadbeds leads to longitudinal cracks. The foundation is treated by traditional techniques, such as cement mixing pile method, prestressed pipe piles, etc. The cost is high and the construction period is long. It is also difficult to achieve ideal requirements in terms of eliminating differential settlement, which increases maintenance costs after road operation

[0011] ⑤ Conventional construction methods are difficult to construct, with long period and high cost

[0012] In general, using the conventional widening method, there are problems such as land acquisition and demolition, pipeline migration, differential settlement of old and new embankments, difficult construction, long construction period, and high engineering cost.

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