Suitable for crushing and utilization of old cement concrete panels under poor support

Abstract

The invention discloses a crushing utilization method suitable for old cement concrete panels under bad support. The crushing utilization method is mainly characterized in that the crushing utilization method comprises the steps that grouting treatment is conducted on the old cement concrete panels first, then a pickaxe machine is used to conduct pre-crushing on old cement concrete slabs on traffic lanes and within the 1m range of the hard shoulder edge, then resonance crushing is conducted on the old cement concrete panels by adopting high frequency and low amplitude modes, then the old cement concrete panels are rolled through a heavy double-steel-wheel roller, after rolling is finished, emulsified asphalt is spread first, and then heavy traffic hot asphalt seal coat is conducted; finally, fine type dense-graded asphalt concrete leveling layer is additionally paved; and as for areas which do not meet the single point deflection value and represent the control value of the deflectionvalue, removing through digging and filling with a high-strength material for replacement or grouting treatment are conducted. The crushing utilization method can not only solve the problem that the crushing difficult of the old cement concrete panels is high under the bad support, but also has the less influence on the overall strength and stability of an old cement concrete pavement structure, and the crushing utilization method has good social and economic benefits.

Description

technical field [0001] The invention belongs to the technical field of road engineering and relates to a method for crushing and utilizing old cement concrete panels under poor support. Background technique [0002] Around the 1990s, my country built a large number of cement concrete pavements on expressways. Since then, due to the abundant cement production in my country, the proportion of cement concrete pavement construction in local roads and urban roads is also relatively high. However, due to thermal expansion and contraction of cement concrete pavement, vertical and horizontal joints need to be set up, and the joints are generally vulnerable to water infiltration and erosion. The joints are prone to early diseases such as mud pumping, wrong platform, void, broken board and so on. In urban roads, extreme climate events such as short-term torrential rains have occurred frequently due to factors such as the heat island effect in recent years, and the drainage of urban r...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to develop a crushing and utilization method suitable for old cement concrete panels under poor support. The overall strength and stability of the cement concrete pavement structure are less affected, which can effectively guarantee the stability and durability of the overlay structure after the old cement concrete panels are broken and utilized, and have good social and economic benefits