TRD Method -Process Principle
1、Principle: After the chain-blade cutting tool is cut vertically and continuously to the design depth, it is pushed horizontally and injected with cement slurry to form a continuous, equal thickness and seamless cement wall ;
2、Insert core material (H-shaped steel, etc.) into the cement mixing wall of equal thickness to form a composite retaining and water stop structure.
TRD Method – Features and Scope
1. It is applicable to clay, sand, gravel and gravel layers, and also has good applicability in dense sand layer with 30-60 standard penetration value and soft rock with saturated uniaxial compressive strength not exceeding 10 MPa;
2. The depth of the finished wall can reach 70 meters, and the verticality deviation shall not be greater than 1/250(when the TRD verticality deviation is not greater than1/300 when it is used as the reinforcement of the inner and outer trench walls of the ground wall);
3.Wall thickness550-950 mm
4.The cement is evenly mixed, and the unconfined compressive strength is 0.5-2.5MPa;
5. The wall has good water resistance, and the permeability coefficient can reach 1×10-6 cm/s to 1×10-7cm/s in sandy soil;
6. The spacing of the interpolated profiles can be evenly arranged with equal spacing, and the rigidity of the enclosure is more uniform;
7. The maximum height of construction machinery is generally not more than 12 meters, and the center of gravity of construction frame is low, with good stability.
Component interpretation
Power station
·Unified interface and installation dimensions, diesel or electric motor power can be selected according to site conditions.
·Adopting imported famous brand engines or domestically produced high-performance electric power (with standard soft starter), reliable performance and high efficiency.
·The electric motor power system can choose to turn on some or all of the electric motors according to on-site needs, reducing energy waste.
Control system
·Adopting a fully electronic hydraulic system with high integration, there are fewer explosion points and the operation is clear at a glance.
·Dual display screen design, constantly monitoring the execution status of the terminal.
·Qinhua driver’s cab, comfortable to ride and easy to operate.
Hydraulic system
·Adopting a famous brand high flow hydraulic main pump and imported Kawasaki hydraulic motor, with a working pressure of 34MPa
·The auxiliary mechanism adopts a load sensing control system with high control accuracy and low heat generation.
·The power head adopts a high-pressure and high flow plunger pump, which has high working pressure and efficiency.
At the same power, the higher the pressure, the smaller the flow rate, reducing pipe overheating.
·Enhanced design of power head, high reliability.
Chassis system
·Mature crawler crane chassis components are used, with good repeatability.
·Crawler walking is convenient and fast, with a small footprint.
·After the track shrinks, it can be transported as a whole, which is convenient and fast.
·The center of gravity of the whole machine is low, making it easy to operate and observe.
