The high-fill grouting construction team utilizes pressurized grouting technology in their construction applications.

The construction and maintenance of expressways in mountainous areas will present a daunting challenge for the highway transportation industry. There are numerous densely populated areas in the mountains, making soil extraction highly inconvenient. Due to compatibility restrictions, it is indeed unavoidable for the subgrade to settle later on.

The Shitai Expressway was closed and opened to traffic in October 1995, covering a total length of 68.12 kilometers. The section from kilometer mark K332+529 to K378+120, which is 45.591 kilometers long, is located in a mountainous and hilly area. The roadbed is primarily composed of heavy earth and stone, followed by heavy trucks or mixed materials. Due to recent applications, some roads have shown different conditions, particularly in mountainous areas, where the maximum settlement exceeds 250px.

To maintain the good traffic conditions on Shitai Road, in recent years, subgrade grouting has been conducted on some severely affected sections, with excellent results. This article discusses the unique engineering technical characteristics, construction methods, existing issues, and insights of the high-fill grouting construction teams during the construction process.

One, plan to select

In our country, the trend of upper-class living in mountainous areas is quite common, with various methods of treatment employed, including soil replacement, preservative application, powder spraying, and weaving. The comprehensive selection of the editing scheme, which is economical, easy to operate, cost-effective, and does not affect the operation of main roads, led to the chosen treatment method.

High-fill Grouting Construction Team

Section II: Slurry Material Selection

The selection of awakening materials is crucial. In the past, additives were commonly used in cement sludge. For example, they also had some drawbacks. The setting time was difficult to control, the usability was poor, and there was shrinkage and hoop stress. The Institute for Advancing Traffic Science has developed a high-speed release material with high water content, composed of two solid powders, a and b. When used, it is first mixed with the flue gas, then with water, in the ratio of ash to water: 1:35:3.5. The a and b sludges can be stored for over 24 hours without adjustment, allowing for long-distance and long-term transportation and storage. The design is comfortable, and the material mixing time can be checked. The two materials can be mixed within 10-60 minutes, with early high strength, reaching over 1.5MPa in 2 hours, and they can also react with surrounding soil particles to form strength. The setting process and the mixture after setting will not become: These features are of great significance for exploring technology and solving the long-standing road maintenance problems.

III. Project Implementation

The holes are in a flower shape, with a spacing of 3.0 meters and a pressure range of 0.5-1.5 MPa. As the pressure decreases from high to low during the later stages of the tank, the approximate number of holes increases significantly within a unit time, indicating a shift from infiltration grouting to expansion grouting. Greetings. If based on the site log, the average porosity is 10.94%, the detailed design process of the high-performance construction team is mostly documented in the materials, but no further details are provided here.

Four: Gain Experience

The subgrade grouting along Shitai Road has been carried out for many years, accumulating certain experience, which includes the following key points:

4.1 The mixed material should possess certain fluidity for ease of application.

Ensure the mixture percentage is meticulously checked to prevent any residual water post-hardening.

Ensure specific expansion of the mixture on 4.3.