The improved soil mixture is mixed centrally in the mixing station with stabilized soil mixing equipment, and equipped with soil crushing equipment to eliminate soil clods. Through the trial mixing and paving in the test section, various construction parameters are summarized, and the factory mixing process parameters are further adjusted and determined.

The optimal water content control scheme of the improved soil mixture is as follows: if the natural water content of the soil is not far from the optimal water content, when mixing in the mixing equipment of the factory, water is sprayed into the improved soil in the form of fog and mixed evenly; If there is a big gap between the natural water content of soil and the optimum water content, it is considered to irrigate the soil in blocks at the borrow yard. If the natural water content of soil is too high, it should be moderately dried in advance or added with appropriate amount of finely ground quicklime to reduce the water content. After paving on site, the color of the mixture should be uniform.

(2) Transportation.

It is transported by large-tonnage dump trucks. The mixed mixture should be transported to the paving site as soon as possible. The mixture should be covered during transportation to reduce water loss.

(3) paving the road.

Unloading in the calculated square, first leveling with bulldozer, shaping with grader, and then quickly rolling with roller for L ~ 2 times. The potholes should be repaired manually, and the isolated mixture should be removed in time and replaced with new mixture. The mixture should be spread evenly on the whole section, and there should be no longitudinal joints and no interruption. When the interruption exceeds 2h for some reason, transverse construction joints shall be set, and the transverse joints shall be overlapped.

According to the specified slope and road arch, and pay special attention to the smoothness of joints. In the process of plastic surgery, vehicles are strictly prohibited. After the initial molding, check the loose laying thickness of the mixture, and make up or reduce the material if necessary.

(4) rolling.

When the mixture is close to the optimum water content, the mixture will be compacted to the required compaction density within the full width of subgrade by heavy roller, and the light will be collected by static pressure for the last time. After compaction, there should be no obvious rolling marks on the surface. When rolling, the junction of each section shall be overlapped and compacted, the longitudinal overlapping length shall not be less than 2.0m, the wheel track overlapping between longitudinal rows shall not be less than 40cm, the staggered joint between the upper and lower layers shall not be less than 3.0m, and the longitudinal overlapping mixing length at the junction of two operation sections shall not be less than 2.0m. 。

During the rolling process, the surface should always be moist, and "spring", looseness and peeling are strictly prohibited. Before the end of rolling, the grader shall be used for final leveling to make it vertical and straight and meet the design requirements.

(5) keeping in good health.

After the improved soil is rolled, if it cannot be continuously constructed, it should be maintained to keep the surface of the improved soil moist for at least 7 days. The improved soil should not be too wet, let alone dry and wet alternately, and control traffic, except sprinklers. When the upper fill can be continuously constructed, no special curing period can be arranged.

When the improved soil is constructed in layers, the next layer of soil can only be filled after the lower layers such as compactness and flatness meet the requirements.

For more information about project/service/procurement bidding, and to improve the winning rate, please click on the bottom of official website Customer Service for free consultation:/#/? source=bdzd