Construction method of synchronizing cement slurry spraying between layers of semi-rigid base layer and base layer paving

Abstract

The invention discloses a semi-rigid pavement base layer interlayer cement slurry spraying and base layer paving synchronous construction method, which comprises the following steps of semi-rigid baselayer construction preparation, and execution according to the relevant specification technical requirements; cement slurry spraying equipment preparation; material preparation; equipment preparation; cement slurry stirring and trial spraying: cement slurry spraying and base layer paving are integrally and synchronously performed; the cement spraying and spreading quantity is generally 0.8 to 1.0kg / m<2>, and the economic quantity is determined through experiments; the semi-rigid base layer paving work is organized according to a conventional cement stable detritus paving construction scheme;the cement slurry stirring and spraying work is performed according to the stirring trial spraying step and the calibrated quantity. The construction method has the advantages that the construction quality can be improved; the construction cost can be reduced; the construction progress can be accelerated.

Description

technical field [0001] The invention relates to the technical field of highway construction, in particular to a construction method for synchronously spraying cement slurry between layers of a semi-rigid base and paving the base. Background technique [0002] The semi-rigid base is the main load-bearing layer of the flexible pavement in the highway. The general design thickness is between 30-40cm. Due to the limitation of construction equipment, construction technology and raw materials, combined with the requirements of relevant technical specifications, it is usually divided into two layers and spread twice. paving construction. In order to improve the interlayer bonding effect of the semi-rigid base and ensure the overall consistency of its stress, the design and specifications require that cement slurry be used as the adhesive between the two layers. In response to this requirement, the following three types are currently used in construction: Scheme: one is manual spra...

AI Technical Summary

Problems solved by technology

[0004] 1. The cement slurry is sprayed on the lower bearing layer of the paving section in advance. During the upper layer paving construction, the cement slurry is easily affected by the advancement of the paver, the turning and reversing of the transport vehicle, and the movement of the operators in the work area. damage by walking

[0005] 2. During the operation of paving the base, a large amount of pre-sprayed cement will adhere to the walking track of the paver and the tires of the transport vehicle, resulting in uneven and partially missing cement slurry, and even a large area of ​​cement slurry is covered by the wheels. After being taken away, it will affect the bonding effect of the upper and lower bases and pollute the surrounding environment

[0007] 4. If it is constructed in the rainy season, if it rains suddenly during the construction process, the cement slurry sprayed first will be washed away by the rain or piled up, the cement slurry will not achieve the effect of bonding between layers, and the accumulation will leave quality problems

[0008] 5. The technological process is to spray the cement slurry first, and then pave the semi-rigid base. There is a time difference in the process, and there are hidden dangers in quality, progress and safety in the connection of the process.