Water-stable large-thickness double-unit double-layer synchronous continuous laying and continuous pressing integral forming construction method

Abstract

The invention provides a water-stable large-thickness double-unit double-layer synchronous continuous laying and continuous pressing integral forming construction method. In the initial setting period, two units are synchronously paved and rolled in a front-and-back continuous layering manner; the distance between the two units is 45-55 m, the two units are combined to complete the total thicknessof the base layer, each unit comprises an anti-segregation paver, a vibratory roller and a rubber-tyred roller, in the paving process, the anti-segregation paver, the vibratory roller and the rubber-tyred roller perform construction sequentially, and the anti-segregation paver sprays cement paste and paves while paving. The flatness of the structural layer can be effectively improved through continuous paving; the two layers are continuously paved in a short time, so that the bonding between the two layers of water stabilizers is enhanced, an upper and lower integrated integral plate is conveniently formed, layered curing is not needed, the interlayer bonding process and materials are simplified, and the continuous line production of the base layer is realized at one time.

Description

technical field [0001] The invention belongs to the technical field of road construction, and in particular relates to a water-stable and large-thick double-unit double-layer synchronous continuous paving and pressing integral forming construction method. Background technique [0002] The design thickness of the semi-rigid base of high-grade highways in my country is generally 20-40cm, and the total thickness of the base and sub-base is 50-60cm. Due to the limitation of paving and compaction mechanical properties, paver cannot meet the one-time paving of large width and thickness. , the general compactor also cannot meet the compaction requirement of water stable base more than 20cm thick. For a long time, the water-stabilized base has been paved in layers and machines. In this construction process, the upper and lower construction layers are not firmly bonded, the flatness is not ideal, the longitudinal joints are difficult to deal with, there are many transverse joints, the...

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Problems solved by technology

The long driving time of the transport truck seriously reduces the paving efficiency. At the same time, the ramp padding process is complicated, the amount of padding is large, and it needs to be cleaned up in time when the construction reaches the ramp position, which greatly reduces the construction efficiency.

[0005] It takes a long time for the paver and road roller to go back and forth, the second paving joint is time-consuming and labor-intensive, the overall process is not well connected, and the construction efficiency is greatly reduced

When the excavation trench encounters rainy water, it will not be able to be removed in time, prolonging the construction period

[0006] The single-unit double-layer continuous paving process adopts multi-layer continuous paving, and there is a problem of process connection. The upper layer will inevitably cause disturbance and damage to the initial setting lower layer in real time. At the same time, the machine will be lifted repeatedly, the road surface joints and transverse joints are many, and the road surface flatness is poor; All the wheel tracks of the transport materials overlap at the bottom of the excavation tank, and the old road bed at the bottom of the tank will inevitably have springs, muddying and disturbance

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