HDD construction specifications are the core of ensuring the safety of trenchless projects, and any operational oversight may lead to equipment failures or safety accidents. This article sorts out 8 HDD construction specifications from the perspective of equipment safety, focusing on key risk points such as crawler braking, hydraulic systems, and mud pressure, to help achieve zero accidents in construction.

1. Inspection of Crawler Brake System: The Foundation of Ground Safety in HDD Construction Specifications

Specification Requirements: Check the wear of brake pads daily (replace when ≤3mm), test the braking distance weekly (≤3 meters at 3km/h), and ensure that service brakes and parking brakes work independently.

Practical Suggestions: When parking on slopes, enable the crawler locking function and fix with hydraulic outriggers, in line with the "dual protection for complex terrain" requirement in HDD  construction specifications.

2. Inspection of Hydraulic Pipeline Leaks: Avoiding the Risk of High-Pressure Oil Splashing

Specification Requirements: Inspect pipeline tightness with pressure testing equipment every 100 operating hours to ensure that the working pressure does not exceed the rated value (e.g., 32MPa for HWF460).

Practical Suggestions: Install splash guards at joints and replace seals regularly (recommended every 500 hours), strictly following the "pressure grading detection" process in HDD construction specifications.

3. Pressure Control of High-Pressure Mud System: Preventing Pipeline Bursting

Specification Requirements: The mud pump pressure must be set to an upper limit (e.g., no more than 40Bar for HWF135) and equipped with an automatic shutdown device for pressure overload.

Practical Suggestions: Adjust pressure according to geology (≤20Bar for soft soil, ≤30Bar for hard rock), in line with the "pressure-geology adaptation" principle in HDD construction specifications.

4. Power Head Torque Monitoring: Avoiding Overload Damage

Specification Requirements: Monitor the power head torque in real-time (e.g., maximum 2235N·m for HWF50) and stop immediately when exceeding the limit.

Practical Suggestions: Enable the torque warning function during hard rock construction and control the drilling speed ≤5m/min according to HDD  construction specifications.

5. Inspection of Drill Pipe Connection Strength: Preventing Falling Accidents

Specification Requirements: Drill pipe bolts must reach 8.8-grade strength and be retightened every 50 piles (refer to the equipment manual for torque values).

Practical Suggestions: Install locknuts to ensure that the connection part passes the 1.5 times rated torque test, meeting the "load-bearing safety factor" standard in HDD  construction specifications.

6. Waterproof Protection of Electrical System: IP65 Rating Cannot Be Ignored

Specification Requirements: Terminal blocks must use waterproof plugs, a dehumidifier must be installed in the control cabinet, and the grounding resistance must be tested monthly to be ≤4Ω.

Practical Suggestions: Purge the circuit with compressed air after rainy construction to avoid short circuits, which is the focus of "harsh environment protection" in HDD construction specifications.

7. Debugging of Remote Control System: Improving Safety in High-Risk Areas

Specification Requirements: The wireless remote control walking function must be tested weekly, with a response delay ≤0.5 seconds, and automatic shutdown when the signal is lost.

Practical Suggestions: Enable remote operation in dangerous sections, with operators at least 10 meters away from the equipment, in line with the "human-machine isolation" principle in HDD construction specifications.

8. Archiving of Regular Maintenance Records: Traceable Safety Guarantee

Specification Requirements: Maintenance records must be kept for at least 3 years, covering data such as component replacement and pressure testing, in line with ISO standards.

Practical Suggestions: Use the digital maintenance system provided by Hengwang to automatically generate compliance reports, meeting the "full-cycle traceability" requirement in HDD construction specifications.

Hengwang Group's Trenchless HDD: A Reliable Choice for Compliance and Safety

Hengwang HWF seriesHDD (HWF50/HWF135/HWF460) strictly follow HDD construction specifications, with core advantages including:

Safety Configuration: Standard with overload protection, remote control, and high-pressure protection systems, passing CE certification;

Strong Adaptability: Crawler width 1330-2250mm, adapting to different road surfaces, meeting construction specifications in narrow areas;

Service Support: Provide "four-dimensional integration" services, including standardized operation training and regular safety inspections.

Leave your project geology and pipe diameter information to obtain a customized plan that meets HDD  construction specifications, and Hengwang's technical team will respond within 24 hours! Strictly adhering to HDD construction specifications and choosing compliant equipment will make every trenchless construction safe and efficient.