Construction Methods & National Patents

State-Level Construction Methods

● Construction Method for Prevented Isolation Pile and Wall in Construction of Pilot Tunnel;
● Construction Method for Extra-large Tonnage Pile Foundation Underpinning Work;
● The Series Construction Methods by means of Compound Shield TBM;
● Construction Method of Segment Lining in Passing Mined Tunnel by TBM;
● Construction Method Applied to Watertight Gas Gallery in the Underground Bare Rock;
● Construction Method for Grouting Engineering in the Abundant Water Ingress, Deep Overburden and Filling-type Karst Cave;
● Construction Method of Slurry TBM with Pressure Applied to Complicated Stratum including High-pressure, Small-section (φ2~4.2m) and Underwater Tunnel;
● Shallow Mining Method Applied to Silt Stratum for Constructing Municipal Underpass;
● Construction Method Applied to Complicated Stratum and Shallow Underwater Tunnel by Means of EPB Shield Machine；
● Shallow Mining Method Applied to Tunnel and Metro Projects;
● Construction Method Applied to Large-span Tunnel in Full-face Tunneling Excavation (Construction Method of Deep Hole Blasting Operation Applied to Double-track Railway Tunnel);
● Construction Method of Cut-and-Cover Top-Down Applied to Strip Foundation;
● Construction Method of Microvibration Blasting Applied to Municipal Underground Project;
● Construction Method of Sand Consolidation, Water Blocking and Grouting Applied to Saturated and Dynamic Water Sand Stratum by means of TSS Pipe;
● Construction Method of Elastic and Monolithic Track Bed;
● Tunneling Construction Method Applied to Railway Station with Three-lines, Large-span and in Soft Rocks;
● Construction Method Applied to Railway Soft Rocks by means of Open-typed Hard Rock TBM.

National Patents

● A Connection Method Applied to Grid-type D-wall with Rigid Joints;
● Pile Foundation Underpinning Method;
● Full-circle One-time Lining and Separated Guide Beam Formwork Jumbo;
● Shield TBM Disc Cutter Opening Ratio in Shield TBM;
● A Back Lining Grouting Material and Making Method Applied to Early-strength, Water-resistance, Dispersion and Dissolution-resistance Shield Tunnel;
● Segmental and Retrograde Grouting Method by means of Hole Opening Grouting Sealing Pipe in a Type of Outer-mixed Double Pipes;
● Segmental and Retrograde Grouting Method by means of Hole Opening Grouting Sealing Pipe in a Type of Inner-mixed Double Pipes;
● Construction Method Applied to Tunnel Continuous Mucking, Concrete Lining and Synchronized Excavation;
● Layout Structure Applied to Drill and Blast Tunneling Method by means of Steel Formwork Jumbo and Conveyor Belt;
● Layout Structure Applied to TBM Tunneling Method by means of Steel Formwork Jumbo and Conveyor Belt;
● Screw Conveyor;
● The Foam Injection Device Applied to Spoil Improvement System by means of Composite Shield TBM;
● Segment Erector;
● Shield TBM Cutterhead Driving and Frequency Converting Control System;
● Bentonite Injection into Shell Lubricating System;
● A Type of Tunneling with Synchronized Lining Formwork Jumbo;
● Segmental and Repeatedly Grouting Device with Small Conduits;
● Drill Rod Backward and Segment Grouting Device;
● Hole Drilling Segmental Advance Grouting and Water Blocking Device;
● Hole Opening Sealing and Double Pipes Backward Grouting Device;
● Steel Pipe Hole Bottom Grouting Device;
● Small Conduits, Outer Valve and Single-Type Segmental Backward Grouting Device;
● Highland Tunnel Ventilation and Air Pre-heating Device;
● Water Curtain Dust Catcher;
● Tunnel Ventilation Volume Adjusting and Bypass Tee;
● Tunnel Gas Disperser;
● Automated Remote Monitoring Device Applied to Medium Column of Cut-and-Cover Top-down Structure;
● Hole Opening Pipe Installation Device Applied to High-pressure Water Ingress Drill Holes;
● Hole Opening Pipe Applied to High Water Pressure Grouting Operation;
● Highland Extra-long Tunneling Axial Ventilator;
● A Type of Inner Hole Grouting Sealing Device;
● Tunnel Ventilation Pipe Breakdown and Ventilator On/Off Sensor;
● Ventilation Device Applied to Inclined Shaft by means of Baffle Plate;