Construction method of red sandstone roadbed

Abstract

The invention relates to a construction method of a red sandstone roadbed, which adopts special mechanical assembly. Aiming at the mechanics of the I type red sandstone roadbed and the II type red sandstone roadbed and the analysis of the road performance, a large-tonnage special compacting machine is used for rolling, wherein the rolling comprises the rolling, the crushing and the compactly extruding through a YZTY-22T pulling type cavel with the vibrating force of 45t, the rolling through a YZ32 ultra-large vibrating force vibrating road rolling machine, and the shocking and the reinforcing through a QCY360 (25KJ trilateral double wheels) shocking road rolling machine. The linear standard of the super highway is high and the work amount of filling and cutting is large, so that the design of wiring can not avoid a wider red sandstone zone and a mass of red sandstones have to be dug up during constructing. If the roadbed can not be filled with the red sandstones but the far-distant other materials, not only the construction period is delayed, but also the construction cost is high. Meanwhile, areas for borrowing and abandoning the soil are difficult to find, so that the existing construction mode can pollute the environment and bring much future troubles. The construction method well makes use of the spot red sandstones, reduces the construction cost, saves the resources, and is good for the civilized construction and the environment protection.

Description

Technical field: [0001] The invention relates to a construction method of expressway subgrade, in particular to a construction method which directly uses Class I and II red sandstone as material for expressway subgrade. Background technique: [0002] Red sandstone is a kind of engineering material with special properties. Class I and II red sandstone has high strength in dry state, but it will soften and disintegrate when exposed to water. In the past, red sandstone was mostly used for the filling of abandoned or low-grade roads. Class I and II red sandstone were rarely used on expressways, and they were generally used in areas 93 (lower embankment) and 94 (upper embankment). Very few in area 96 (road bed). Even in the embankment filling of low-grade roads, the conventional stone filling method and conventional construction technology cannot meet the standards required by the code, and quality problems such as settlement and collapse often occur, resulting in damage to the ...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the problem that the existing conventional construction methods cannot guarantee the quality of roadbed filling, the purpose of the present invention is to provide a construction method for expressway roadbeds using red sandstone as a material, and use I and II red sandstones for embankments and 96 districts. For the filling of the road bed, this method can not only solve the quality problems that are easy to occur in the construction of conventional methods, but also has high mechanical utilization rate, fast construction progress, and good roadbed forming effect