Bioenzyme soil solidified subbase and multi-element multi-modified roller compacted cement concrete surface layer new pavement structure complete set technology is to use soil curing agent, adopt polymer compound road construction technology, build road subbase and base layer; adopt multi-element multi-modified roller compacted cement concrete surface technology, form a new type of pavement structure, widely applicable to different grades of road needs, is a technological revolution in the field of road construction in China. From September 2007 to June 2014, the Hunan Provincial Department of Science and Technology listed this complete set of technology as a major science and technology project in Hunan Province, and jointly tackled key problems with the Hunan Provincial Department of Transportation. After seven consecutive years of systematic research, popularization and application, it is fully mature as a road construction technology with comprehensive promotion and application. Bio-enzyme soil curing agent is a revolutionary new road building material completely different from traditional road building materials. It uses a wide range of cheap ground materials to choose from: waste slag, clay, natural sand and gravel, natural wind fossil and building brick slag (picture) to replace traditional high-priced building materials and is widely used in road structures such as finishing layer, sub-base layer and base layer for various road construction and transformation.

Soil solidification mechanism of biological enzyme: microscopically, biological enzyme greatly reduces the chemical activation energy of cross-linking and binding of reverse ions and groups in the soil through catalysis, thus expanding the microscopic cross-linking of the soil, binding reactive molecules and group structure, and gradually moving from scattered Brownian motion to "neat" arranged motion. When such "queue" reaches a certain order of magnitude, A microscopic "grid" structure is formed in the soil.

Macroscopically, when the "grid" structure also reaches a certain order of magnitude, the structural strength of the soil, shear resistance, wear resistance and other engineering properties of the qualitative changes. In the road construction according to the technical requirements of biological enzyme construction, health, about 28 days, its performance increased by 3 to 5 times, fully meet the comprehensive strength requirements of the pavement base structure.

Multi-multiple modified RCC composite pavement is a new type of semi-rigid and semi-flexible pavement structure, through the structural design of the new pavement, the composition and performance of the fiber powder modified RCC surface functional layer material and its construction process to carry out a systematic and in-depth research work. According to the design principle of cement concrete and the requirements of design specifications, the structure of fiber powder modified rolled cement concrete composite pavement was optimized, the indoor molding method of fiber powder modified rolled cement concrete surface functional layer material was proposed by simulating the construction molding process characteristics of asphalt paver, and the optimal aggregate gradation of fiber powder modified rolled cement concrete surface functional layer material was obtained according to the relevant aggregate gradation design theory.

Compared with ordinary cement concrete, the new pavement structure of bio-enzyme soil solidified subbase and multi-element multi-modified RCC surface has excellent road performance, and the new pavement structure of bio-enzyme soil solidified subbase and multi-element multi-modified RCC surface has excellent mechanical properties, excellent bending toughness, good durability and remarkable crack resistance. It can be seen that the new pavement structure of bio-enzyme soil solidified subbase and multi-element multi-modified crushed cement concrete surface layer has excellent properties such as flame retardant, anti-skid, noise reduction, high toughness, impact resistance, crack resistance and wear resistance, and has broad application prospects in the field of highway tunnels.