6 points of Sinorock SDA in tunnel construction

Time:2024-03-13From:sinorock View:

Introduction

Tunnel construction is a complex process that demands meticulous attention to detail, especially concerning the stability of surrounding rock. The utilization of anchor bolts plays a crucial role in ensuring construction safety and stability. In recent years, self-drilling anchor bolts have gained widespread recognition for their multifunctional capabilities in tunnel support engineering. Sinorock, a leading anchor bolt manufacturer, has been at the forefront of providing innovative solutions to enhance construction efficiency and safety. In this comprehensive guide, we delve into the six crucial details that construction professionals must note during the installation of Sinorock SDA anchor bolts.

self-drilling-pipe-umbrella-system-support

self-drilling-pipe-umbrella-system-support

1. Conduct Comprehensive Product Inspections

Before delving into the tunnel construction project, construction professionals should prioritize conducting comprehensive product inspections. This step serves as the foundation for ensuring the quality and reliability of Sinorock SDA anchor bolts throughout the installation process. Thorough product inspections enable construction teams to verify the quality and conformity of Sinorock SDA anchor bolts with industry standards and design specifications and help identify any potential defects or irregularities that might compromise the performance of the anchor bolts during installation.
Self-drilling anchor bolts must adhere to the exact dimensions outlined in the design specifications. Construction professionals should visually inspect each SDA anchor bolt for any visible defects, irregularities, or damage. Carefully inspect the surface thread of the hollow bar, ensuring its continuous and wave-like configuration. Any deviations or irregularities in the thread pattern could affect the anchor bolt's ability to form a secure and durable connection with mortar during installation.
By prioritizing comprehensive product inspections, construction professionals may lay the groundwork for a successful SDA anchor bolt installation.

2. Hole Measurement: Precision in Design and Placement

The foundation of any successful tunnel construction lies in the meticulous planning and execution of hole measurements. Design drawings, tailored to the specific geological conditions, serve as the roadmap for creating anchor holes. It is imperative to adhere to the design spacing and mark two rows of anchor holes to accurately determine their location. Precision in hole measurement ensures optimal distribution and utilization of anchor bolts, thereby enhancing the overall stability of the tunnel.

3. Anchor Bolt Installation: Attention to Detail for Optimal Support

The installation of self-drilling anchor bolts demands careful consideration of various details. Prior to installation, it is crucial to check the hollow bar for any obstructions to prevent potential blockages. The length of the anchor bar should align with the design specifications, and a meticulous check of the anchor bolts, constituting 3% of the total number (not less than three), ensures a comprehensive and reliable support structure. Attention to these details during installation is paramount for the success of the tunnel construction project.

4. Preparing Grouting Slurry

The slurry preparation involves combining water and lime with a water-cement ratio ranging from 0.5 to 0.55. Utilizing a mixer, the cement slurry is carefully mixed to achieve the desired consistency. The prepared slurry is then deposited into the designated pit, ready to be utilized in the grouting phase during the anchor bolt drilling process. Connecting the grouting pipe, configuring the slurry, and starting the grouting pump are integral steps in the process.

5. Simultaneous Grouting and Drilling

Self-drilling anchor bolt adopts the construction process of grouting while drilling, which is more convenient compared with ordinary hollow anchors, no need to drill holes and then put anchors, drilling and grouting can be completed at the same time, which speeds up the construction speed and ensures the construction period. The connection of the anchor bolt needs to be realized through the coupler with equal strength with the anchor, if not equal strength, it is easy to break from the connection in the process of drilling, which affects the construction progress.
Simultaneous grouting and drilling ensure a seamless integration of the anchor bolts into the rock, enhancing the efficiency and effectiveness of the installation process. As the anchor bolt drilling progresses, grouting is performed concurrently, facilitating the immediate filling of the drilled hole with the prepared slurry. This simultaneous grouting and drilling technique not only accelerates the installation timeline but also reinforces the bond between the anchor bolts and the surrounding rock.

sda bolt in tunnel

6. Install the Domed Plate and Tighten the Nut: Finalizing the Support System

The final steps in the self-drilling anchor bolt installation involve attaching the domed plate and tightening the nut. When installing the domed plate, ensure the concave surface is in close contact with the rock surface. In instances of uneven rock surfaces, fill the gaps with M10 mortar. Once the slurry solidifies, tighten the nut using a wrench. This meticulous approach to the final stages of installation ensures a robust and enduring support system for the tunnel.

Conclusion: Elevating Construction Safety with Sinorock SDA Anchor Bolts

In conclusion, the successful installation of self-drilling anchor bolts in tunnel construction relies on a thorough understanding of the intricate details involved. Sinorock, as a leading anchoring products manufacturer, prioritizes innovation and safety in its product offerings. By incorporating the six crucial details discussed in this article, construction professionals can elevate safety standards, ensure stability, and streamline the tunnel construction process. Sinorock's commitment to adapting to diverse geological conditions and providing tailored construction plans underscores its dedication to making projects safer and more efficient. As the industry continues to evolve, embracing cutting-edge solutions like Sinorock SDA anchor bolts becomes imperative for achieving excellence in tunnel construction. If you encounter problems during construction, please feel free to contact Sinorock at sinorock@sinorockco.com, our technical team will provide you with customized system solutions to help you solve problems.

Return The List