---
title: "Pipe Jacking Machine"
industry: "Repair and Installation of Machinery and Equipment"
verification_protocol:
  urn: "URN:CNFX:ME:PIPE_JACKING_MACHINE"
  data_integrity_hash: "15ad84a19656900027d93d7ac13c4bca"
  source_authority: "https://cnfx.com"
  strict_mode: true
source_identity:
  provider: "CNFX Industrial Knowledge Graph"
  index_version: "2026.Q1-Universal"
  authority_id: "URN:CNFX:ME:PIPE_JACKING_MACHINE"
  data_source_uri: "https://cnfx.com/llms/industry/repair-installation-machinery-equipment/product/pipe-jacking-machine.md"
  official_resource_url: "https://cnfx.com/industry/repair-installation-machinery-equipment/product/pipe-jacking-machine"
  is_verified_logic: true
attributes:
  primary_spec:
    status: "config-dependent"
    typical_range: "0.5-3.0 MPa hydraulic pressure, 10-100 mm/min jacking speed, 100-2000 mm pipe diameter"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 3.5
    unit: "MPa"
    consequence: "Hydraulic seal extrusion failure at 3.5 MPa due to elastomer material yield strength limit, pipe buckling at critical load P_cr = (π²EI)/(KL)² where soil pressure exceeds 1.5σ_yield, gear tooth bending fatigue at 10⁷ cycles with S-N curve showing endurance limit at 400 MPa stress amplitude"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Hydraulic fluid contamination exceeding ISO 4406 18/16/13 cleanliness level"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Install dual 3 μm absolute filtration with differential pressure monitoring and automatic bypass at 0.3 MPa ΔP"
  - node_2:
      trigger: "Cutterhead bearing lubrication failure due to grease washout in water-saturated soils"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Implement labyrinth seals with 0.1 mm radial clearance and automatic grease injection at 30-minute intervals during operation"
bom_nodes:
  cutting-head:
    type: "device"
    urn: "URN:CNFX:ME:CUTTING_HEAD"
    interface_type: "physical-logic-coupled"
  main-jacking-system:
    type: "part"
    urn: "URN:CNFX:ME:MAIN_JACKING_SYSTEM"
    interface_type: "physical-logic-coupled"
  steering-system:
    type: "part"
    urn: "URN:CNFX:ME:STEERING_SYSTEM"
    interface_type: "physical-logic-coupled"
  spoil-removal-system:
    type: "part"
    urn: "URN:CNFX:ME:SPOIL_REMOVAL_SYSTEM"
    interface_type: "physical-logic-coupled"
  control-cabin:
    type: "part"
    urn: "URN:CNFX:ME:CONTROL_CABIN"
    interface_type: "physical-logic-coupled"
  laser-guidance-system:
    type: "part"
    urn: "URN:CNFX:ME:LASER_GUIDANCE_SYSTEM"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 9001:2015 QUALITY MANAGEMENT SYSTEMS"
    scope: "Verified Engineering Specification"
  - standard: "EN 12110:2014 TUNNELLING MACHINES - AIR LOCKS - SAFETY REQUIREMENTS"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/repair-installation-machinery-equipment/product/pipe-jacking-machine.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "7e808bb542c1ad5f4d1ff926399fa2301bc36cc747618b8c3f7dd576b1ba7873"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Pipe Jacking Machine

## 1. Technical Definition
A trenchless construction machine used to install underground pipes by jacking them through the ground while excavating soil from within the pipe.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0.5-3.0 MPa hydraulic pressure, 10-100 mm/min jacking speed, 100-2000 mm pipe diameter**. Failure boundary: **Hydraulic pressure exceeding 3.5 MPa causes seal failure, soil pressure exceeding 1.5 times pipe yield strength causes pipe buckling, cutterhead torque exceeding 150 kN·m causes gearbox shear failure**, Mechanism: **Hydraulic seal extrusion failure at 3.5 MPa due to elastomer material yield strength limit, pipe buckling at critical load P_cr = (π²EI)/(KL)² where soil pressure exceeds 1.5σ_yield, gear tooth bending fatigue at 10⁷ cycles with S-N curve showing endurance limit at 400 MPa stress amplitude**.

### 2.1 Analytical Physics Model
Governed by the **Thin-Wall Pressure Vessel Stress Analysis**:

> **Primary Equation**: $\sigma_h = \frac{P \cdot D}{2t}$  
> **Engineering Impact**: Determines the hoop stress boundary to prevent rupture.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| P | Internal Pressure | Engineering Constant |
| D | Diameter | Engineering Constant |
| t | Wall Thickness | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Hydraulic fluid contamination exceeding ISO 4406 18/16/13 cleanliness level | 8 | Servo valve spool seizure causing loss of pressure control | Install dual 3 μm absolute filtration with differential pressure monitoring and automatic bypass at 0.3 MPa ΔP |
| Cutterhead bearing lubrication failure due to grease washout in water-saturated soils | 8 | Bearing cage fracture at 120°C operating temperature with subsequent raceway spalling | Implement labyrinth seals with 0.1 mm radial clearance and automatic grease injection at 30-minute intervals during operation |

## 3. Key Technical Parameters
| Parameter | Value | Unit | Status |
| :--- | :--- | :--- | :--- |
| primary_spec | Config-dependent | mm | Verified |

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)
- [Cutting Head](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/cutting-head.md) `(Standalone System)`
- [Main Jacking System](https://cnfx.com/llms/industry/repair-installation-machinery-equipment/product/main-jacking-system.md) `(Standalone System)`
- [Steering System](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/steering-system.md) `(Standalone System)`
- [Spoil Removal System](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/spoil-removal-system.md) `(Standalone System)`
- [Control Cabin](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/control-cabin.md) `(Standalone System)`
- [Laser Guidance System](https://cnfx.com/llms/industry/machinery-and-equipment-manufacturing/product/laser-guidance-system.md) `(Standalone System)`

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **Hydraulic Power Unit**, **Soil Conveyor System**  
**Downstream Applications**: Sewer Pipeline, Water Supply Pipeline, Cable Conduit  

## 5. Engineering Risks & FAQ
- **Caution**: 
- **Caution**: 
- **Caution**: 

### Q: What is the maximum pipe diameter a pipe jacking machine can handle?
**A**: Pipe jacking machines typically handle diameters from 800mm to 3500mm, with custom machines available for larger projects in machinery installation.

### Q: How does the laser guidance system improve pipe jacking accuracy?
**A**: The laser guidance system provides real-time alignment data to the steering system, maintaining precise pipe placement within ±10mm accuracy over long distances.

### Q: What maintenance is required for pipe jacking machine hydraulic components?
**A**: Regular hydraulic fluid analysis, filter replacement every 500 operating hours, and seal inspections prevent downtime in industrial machinery repair applications.

## 6. Manufacturing Compliance
- ISO 9001:2015 QUALITY MANAGEMENT SYSTEMS
- EN 12110:2014 TUNNELLING MACHINES - AIR LOCKS - SAFETY REQUIREMENTS

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Pipe Jacking Machine](https://cnfx.com/industry/repair-installation-machinery-equipment/product/pipe-jacking-machine)**

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **6** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: PIPE_JACKING_MACHINE | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 3056bc3b
