Main Jacking System for Pipe Jacking

Product Specifications

Technical details and manufacturing context for Main Jacking System

Definition

The Main Jacking System is the core propulsion component of a Pipe Jacking Machine, responsible for generating the substantial thrust force required to advance pipe sections through soil or rock formations. It typically consists of hydraulic cylinders, power units, control systems, and reaction structures that work together to apply controlled, high-pressure force against the pipe string, enabling precise underground installation with minimal surface disruption. The system is designed for heavy-duty use in trenchless technology applications, where it must deliver consistent force over long distances while maintaining alignment accuracy. Key components include high-strength alloy steel frames, chromium-plated hydraulic cylinders, and hardened steel mounting plates, all selected for durability under extreme loads. The system's performance is characterized by parameters such as thrust force (200–1000 t), operating pressure (20–35 MPa), stroke length (1500–3000 mm), cylinder bore diameter (200–500 mm), piston rod diameter (100–250 mm), jacking speed (10–80 mm/min), positioning accuracy (±5 mm), power supply (380–690 V AC, IEC 60038), operating temperature (-20–50 °C), ingress protection (IP54–IP65, IEC 60529), hydraulic fluid type (ISO VG 32–68, ISO 6743-4), and system weight (5–20 t). These values are reference ranges and must be verified for the specific model and application. The system operates by using hydraulic pressure to extend multiple synchronized jacking cylinders against a reaction wall or thrust block, pushing the pipe string forward. It is essential for pipe jacking projects, and its selection depends on pipe diameter, ground conditions, and required thrust. Always confirm model-specific specifications and compliance with relevant standards with the legal manufacturer or supplier.

Working Principle

The system operates by using hydraulic pressure to extend multiple synchronized jacking cylinders against a reaction wall or thrust block. These cylinders push against the trailing edge of the pipe string, transmitting force through the pipe sections to the cutting head at the front. The system maintains continuous pressure while allowing for retraction and repositioning of cylinders to enable sequential jacking strokes as pipes are added to the string. This method ensures controlled advancement and alignment during underground installation.

Common Materials

High-strength alloy steel, Chromium-plated hydraulic cylinders, Hardened steel mounting plates

Technical Parameters

Parameter	Typical range	Notes & selection driver
Thrust Force	200–1000 t	Select based on pipe diameter and ground conditions
Operating Pressure	20–35 MPa	Higher pressure for larger thrust
Stroke Length	1500–3000 mm	Determines jacking step length
Cylinder Bore Diameter	200–500 mm	Affects thrust and speed
Piston Rod Diameter	100–250 mm	Buckling strength under load
Jacking Speed	10–80 mm/min	Adjustable for soil conditions
Positioning Accuracy	±5 mm	Ensures alignment within tolerance
Power Supply	380–690 V AC	Three-phase, 50/60 HzIEC 60038
Operating Temperature	-20–50 °C	Hydraulic fluid viscosity limits
Ingress Protection	IP54–IP65	Dust and water resistance for siteIEC 60529
Hydraulic Fluid Type	ISO VG 32–68	Mineral oil, anti-wearISO 6743-4
System Weight	5–20 t	Includes cylinders, pump, frame

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Hydraulic Jacking Cylinders
Generate and transmit thrust force through piston extension

Material: High-strength steel with chrome plating
Hydraulic Power Unit
Provides pressurized hydraulic fluid to actuate cylinders

Material: Steel housing with hydraulic components
Control System
Manages cylinder synchronization, pressure regulation, and stroke control

Material: Electronic components with steel enclosure
Thrust Ring/Reaction Structure
Distributes thrust forces evenly and provides reaction surface

Material: Reinforced steel plate construction

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Main Jacking System.

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Pipe Jacking Machine

View system integration details

Manufacturers of Main Jacking System

Manufacturer profiles associated with Main Jacking System.

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Frequently Asked Questions

What is the primary function of the Main Jacking System?

It generates and applies the forward thrust force to push pipes through the ground during pipe jacking operations, enabling underground installation without open-cut excavation.

What are typical thrust force ranges?

The reference range is 200–1000 tonnes, but the required value depends on pipe diameter, ground conditions, and project specifications. Always verify with the manufacturer.

Which standards are relevant for this component?

Relevant standards include IEC 60038 for power supply, IEC 60529 for ingress protection, and ISO 6743-4 for hydraulic fluid type. Compliance must be confirmed with the supplier.

How should I select the right Main Jacking System?

Selection is based on required thrust force, stroke length, speed, and alignment accuracy, which depend on pipe diameter and ground conditions. Consult the manufacturer for model-specific data.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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pressure:	Up to 350 bar
flow rate:	10-200 L/min
temperature:	-10°C to 50°C
slurry concentration:	Up to 40% solids by weight

Main Jacking System