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Water Inrush Treatment and Ground Improvement at Thailand MRT Station Excavation

WATER INRUSH TREATMENT AND GROUND IMPROVEMENT AT THAILAND MRT STATION EXCAVATION Water-stop and stabilization improvement of site damaged by ground uplifting 1. Project Background In a Thai MRT station construction project, the reverse construction method was employed, with diaphragm walls penetrating into the clay layer below the excavation level to prevent groundwater infiltration. However, an

Abnormal Machine

Abnormal Machine Vibration: Reinforcement of Industrial Factory Foundation

ABNORMAL MACHINE VIBRATION: REINFORCEMENT OF INDUSTRIAL FACTORY FOUNDATION Ground improvement by loose zone fill and weak zone compaction grouting in soft soil site 1. Background An industrial plant experienced abnormal vibrations in some of its machines after a period of operation. In order to prevent disasters, the management decided to commission a professional firm to

Ground Improvement at Launching Site of TBM Tunnel in Composite Strata

Ground Improvement at Launching Site of TBM Tunnel in Composite Strata Integrated Ground Improvement using Full-Length Casing Piles, High-Pressure Jet Grouting, and Double-Packer Grout Injection 1. Project Background The launching site of an underground TBM tunnel was located at a depth of GL-35.1m to GL-40.2m below the ground surface. The upper part of the tunnel

Dual Pipe Grouting

1. Dual Pipe Grouting The dual pipe grouting method is a versatile low-pressure grouting technology suitable for various formations and grout materials, with adjustable grout curing time. In this method, the strata are treated through 50cm sequential or reverse grouting intervals, allowing for effective treatment of compacted, split, vein intrusion, or plugging. The unique characteristic

Chemical Grout

Chemical Grout Materials – Complete Introduction

Chemical Grout Materials – Complete Introduction 1. Chemical Materials Chemical grout materials are used in injection into the ground strata to increase strata strength, reduce permeability, and prevent liquefaction. They achieve these purposes through processes such as penetration, diffusion, gelation, or solidification. Commonly used chemical grout materials include true solutions (ionic solutions) and gel-like suspensions


Repair of Leakage in Sewer RCP Pipe Joints

REPAIR OF LEAKAGE IN SEWER RCP PIPE JOINTS Pipe leak sealing and surrounding ground improvement and reinforcement techniques 1. Project Background A sewage RCP pipe in a sewer system was suspected to have developed cracks in the joints due to nearby construction activities, resulting in inrush groundwater containing fine sand into the pipe. To prevent

In Use Underground Station Side Walls and Shallow Buried Tunnel Water Seepage Sealing

IN USE UNDERGROUND STATION SIDE WALLS AND SHALLOW BURIED TUNNEL WATER SEEPAGE SEALING  Ground improvement and repair technology for water & sand leakage in diaphragm walls expansion joints, and structural cracks. 1. Project Background  An underground MRT station and shallow-buried tunnel sidewall experienced water leakage and localized soil infiltration after operating for a period of


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

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