Trenchless pipe jacking is a non-invasive pipeline laying technique with a wide range of applications, particularly suitable for complex ground environments where excavation is not feasible. The following details the engineering types, geological conditions, and crossing scenarios.
Trenchless pipe jacking is primarily used for the installation, repair, or replacement of underground pipelines, including but not limited to:
Municipal EngineeringCity water supply and drainage (rainwater and sewage) pipelines, gas pipelines, thermal pipelines, etc.
Energy & Communication EngineeringPower cable conduits, communication optical cable protection conduits, oil pipelines, etc.
Civil Engineering ProjectIrrigation pipes, water conveyance pipes, culverts, etc.
Industrial EngineeringFactory internal material conveyance pipelines and underground pipeline renovations in the industrial area.
The jacking construction method is highly adaptable to geological conditions, capable of operation in various soil strata, including:
Viscous soilClay, silt clay, etc., have a relatively uniform soil texture with good stability, making it less prone to collapse during excavation.
Sand and soilIncorporating silt, fine sand, and medium sand, measures such as grouting reinforcement and mud-bonded walling are required to control ground deformation.
Gravel soilWhen dealing with soil layers containing a small amount of gravel (where the gravel particle size is small and the content is low), the soil can be advanced with the assistance of crushing equipment.
Soft SoilPlease be mindful of ground subsidence when dealing with materials such as silt and silty soil; construction methods such as soil improvement or enhanced support should be employed.
Rock layerFor soft rock formations (such as shale and mudstone), advancement can be achieved through rock破碎 equipment (like breaker hammers, shield cutting tools); for hard rock strata, a combination of shield tunneling techniques or pre-blast treatment is required.
The core advantage of pipe jacking construction is its ability to cross ground obstructions, making it particularly suitable for the following scenarios:
Crossing Traffic LanesInfrastructure such as main city roads, highways, railways, and subway lines can avoid traffic disruptions caused by excavation.
Crossing WatersOur project includes rivers, lakes, canals, and wetlands, all without the need for embankments, thereby minimizing the impact on aquatic ecosystems.
Through buildings/structuresOur construction methods, such as for houses, bridges, underground parking lots, and historical sites, minimize disturbance to existing structures to the greatest extent possible.
Crossing Sensitive AreasAreas with strict requirements for noise, dust, and traffic disturbance, such as schools and business districts.
Pipe diameter rangeRanging from several tens of millimeters (such as cable protection pipes) to several meters (such as large-diameter drainage pipes), common pipe diameters range from 0.5 meters to 3 meters, with special projects exceeding 5 meters.
Pipe MaterialSuitable for reinforced concrete pipes, steel pipes, glass steel pipes (FRP), polyethylene pipes (PE), and more, with specific choices based on engineering pressure, corrosiveness requirements, etc.
The scope of application for pipe jacking construction can be summarized as:In scenarios where ground environmental protection, obstacle crossing, or non-excavation is required, we lay various types of underground pipelines in different materials and specifications, adaptable to most geological conditions.Its limitations mainly occur in scenarios involving extremely hard rock, high water pressure (requiring special equipment), or extremely short distances (low construction efficiency), where a combination of other trenchless technologies (such as directional drilling, pipe ramming) or excavation methods is needed to address the issue comprehensively.
