Method for increasing single lane by utilizing roadbed

Abstract

The invention discloses a method for increasing a single lane by utilizing a roadbed. The method for increasing the single lane by utilizing the roadbed comprises the steps that (a) the position of a roadbed ramp is worked out according to the length of the lane added on an original road and through the method of the right triangle in mathematics, a spread foundation is constructed at the position, the foundation is made of concrete, the width of the foundation is 1-2m, and the thickness of the foundation is 0.5-1m; (b) a wall body is constructed on the spread foundation, the wall body is made of concrete, the width of the wall body is 30-80cm, drain holes are formed in the wall body, and the drain holes are formed with the interval of 20-50m; (c) a covering plate is arranged between the original road and the wall body and is made of reinforced concrete, and the thickness of the covering plate is 30-80cm; (d) road surface processing is carried out on the covering plate and the construction process is finished. By means of the method for increasing the single lane by utilizing the roadbed, the space in the range of an original bank slope is fully utilized, additional land acquisition is not needed in the process of widening, working procedures are simplified, construction period is shortened, and construction cost is lowered.

Description

technical field [0001] The invention relates to a method for increasing a single lane by using a roadbed. Background technique [0002] With the rapid development of society, the rapid popularization of automobiles and the rapid growth of traffic volume, the existing highways, especially the existing highways, can no longer meet the demand. To this end, widening the existing highway is a commonly used engineering measure. In coastal areas such as the Pearl River Delta, it is often necessary to widen the subgrade distributed on the deep soft foundation. At this time, in order to reduce the impact of the new widened subgrade on the old subgrade, the following two methods are commonly used in the project to carry out the widening treatment: a. The soft foundation is treated with composite foundation, and the embankment is filled with soil and stone; b, the soft foundation is not treated Or only for shallow treatment, the embankment adopts light embankment. Mode a involves a ...

AI Technical Summary

Problems solved by technology

Method b overcomes the shortcoming of long construction period in method a because no soft foundation treatment or only shallow layer treatment is carried out. However, due to the low tensile strength and certain permeability of light materials commonly used in engineering, anti-seepage is required Measures and reinforcement and other measures to meet the needs of the project

In addition, light soil materials are more expensive, so the project cost is still high when adopting method b

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