Integrated Drilling, Reaming and Cleaning Machine, Multi-Section Drilled and Reamed Cast-in-Place Pile, and Variable Diameter Cast-in-Place Pile
　　 The "integrated drilling, reaming and cleaning machine" is a dedicated construction equipment for "multi-section drilled and reamed cast-in-place piles" that integrates drilling, reaming and cleaning. The related technology is referred to as "drilling and reaming technology", which is the independent intellectual property of Beijing Rongchuang Geotechnical Engineering Co., Ltd. The advent of drilling and reaming technology has pushed the construction technology of slurry wall-protected bored cast-in-place piles to a new height.
　　 Supported by 10 national patents, the integrated drilling, reaming and cleaning machine takes a new approach with multi-functional (drilling, reaming, cleaning) construction, is marked by the one-machine formation of multi-section drilled and reamed cast-in-place piles (referred to as "drilled and reamed piles"), highlights reliable formation quality of enlarged head cavities, and stands out for its high hole-forming construction efficiency.
　　 Multi-section drilled and reamed cast-in-place piles belong to the category of variable diameter cast-in-place piles. They utilize the principle that end resistance per unit area is far greater than side friction, and set one or several enlarged heads (expanded diameter bodies) in the pile body to multiply the end bearing area of the pile body, thereby significantly increasing the bearing capacity per unit volume of the pile and saving the cost of pile foundation engineering. Usually, the enlarged heads account for the largest proportion of the bearing capacity of multi-section drilled and reamed cast-in-place piles, transforming the original friction pile into a friction end-bearing pile.
　　Performance characteristics:
　　1. One machine with multiple functions and high construction efficiency.
　　2. Simple structure and flexible operation of the whole machine. The whole machine is small in size, light in weight, and low in manufacturing and transportation costs.
　　3. Reliable formation quality of enlarged head cavities, and the formation quality of enlarged heads is easy to monitor.
　　4. Wide applicability to various strata.
　　5. Energy saving and environmental protection: The discharge of waste slurry is only about one-third of that of the normal circulation construction process for ordinary bored cast-in-place piles, and its energy-saving and environmental protection benefits are very obvious.
　　6. Low construction noise and little interference to the surrounding environment.