Tunnel Excavation Harmful Gas Sealing
TUNNEL EXCAVATION HARMFUL GAS SEALING Gas-stop grouting technology in rock formation 1. Project Background During the excavation of a tunnel, combustible gas was found to be escaping from fissures in the rock formation, with concentrations exceeding 1.75%. The construction unit immediately ceased drilling and blasting work, and carried out exploration holes to investigate the gas
Leakage Sealing at Manhole Maintenance Room and Pipeline Connections
LEAKAGE SEALING AT MANHOLE MAINENANCE ROOM AND PIPELINE CONNECTIONS Small-diameter pipeline leak-stopping grouting tech in confined spaces 1. Project Background An industrial area uses embedded PVC pipelines to connect various cables. There is a manhole maintenance room set up between the pipelines to facilitate construction and any maintenance. After a period of use, it was
Double-Packer Grouting Method
1. Double-Packer Grouting Method Double-Packer Grouting, also known as Marshall Pipe Grouting or Double-Ring Grouting, is a low-pressure injection technique that allows for repeated injection of different grout materials. It involves the installation of outer grouting pipes in the ground at regular intervals, typically equipped with check rubber sleeves (@33.3cm or @50cm). These pipes are
Ground Improvement: Five Different Methods of Ground Improvement!
1. Ground Improvement is not Limited to High-Pressure Jet Grouting Ground improvement: high-pressure jet grouting (replacement method): Effective regional formation improvement Careful evaluation of water sealing effectiveness Water-stop curtain – comprehensive reduction of soil permeability depending on ground conditions – unsuitable ― 2. Grouting Methods for Ground Improvement ― 2-1.Ground Improvement : High-Pressure Jet Grouting
Hot Bitumen Grouting Method
Hot Bitumen Grouting Method 1. What is Hot Bitumen Grouting Method? Hot bitumen grouting is a specialized technique that utilizes a specific type of bitumen that exhibits a liquid state at high temperatures and rapidly increases in viscosity when in contact with groundwater or as it cools. This method is employed in areas with flowing
Resin Grouting Method Introduction
1. What is Resin Grouting Resin Grouting (Shallow Resin Grouting Method) is a grouting technique used within 5 meters below the ground surface. It involves the use of small-diameter drilling and small-caliber grouting pipes to inject suitable grout materials into the ground. The aim is to achieve purposes such as raising pavements, structures, and buildings,
High-Pressure Injection Grouting Method
1. High-Pressure Injection Grouting : Clarifying the Concept High-Pressure Injection Grouting Method: CCP – Small-Diameter High-Pressure Injection Pile (with Cement Slurry or Small Amount of Additives) Commonly used for: Assisting in water sealing of retaining structures (double-row design on the water-facing side/sand or interlayer formation considerations for effectiveness and verticality/counteracting soil pressures on retaining structures)
Sealing Technology for Foundation Pit Excavation In Sedimentary Strata
SEALING TECHNOLOGY FOR FOUNDATION PIT EXCAVATION IN SEDIMENTARY STRATA Rescue method for sealing foundation pit bottom after large water inrush emergency. 1. Project Background A 10m-diameter shaft was being excavated by TBM for high-voltage underground cable on the Chidlom Station Outgoing Cable Tunnel Project in Bangkok, Thailand. A sudden emergency occurred when the clay layer
Underground Structure Exterior Wall Waterproof Layer
UNDERGROUND STRUCTURE EXTERIOR WALL WATERPROOF LAYER Hot bitumen grouting technology to form a waterproof layer 1. Project Background A shared pipeline project was constructed by the open cut method. One of the sections could not meet the safety slope requirements for excavation because the adjacent buildings on both sides were close to the excavation surface.
Introduction to Rigid Foundation Precision Jacking Application
INTRODUCTION TO RIGID FOUNDATION PRECISION JACKING APPLICATION Micro-drilling grouting and monitoring technology 1. Project Background For rigid foundations such as rigid roadbeds of expressways, airport taxiways, MRT system track slabs, precision workshop foundations, etc., once the stratum below the foundation is disturbed, subsidence of different scales may occur. After subsidence occurs, the behavior of the