Self-drilling anchors in tunnel surrounding rock support
Time:2020-07-25From:sinorock View:
Self-drilling bolt support is the form of tunnel construction support. It can effectively control rock loosening caused by blasting and excavation and improve the surrounding rock stability. Jiaozhou Bay Subsea Tunnel In Qingdao connection line passes through Yunnan Road and Sichuan Road. It is in a built-up area, surrounded by numerous military and civil facilities and densely distributed pipelines. During the tunnel construction, the safety of the above-ground facilities should be ensured, but the above-ground buildings are mainly multi-layered, which puts forward high requirements on the excavation and support of the surrounding rock.After forming an underground cavern by blasting or other means during construction, the rock's force status has changed, and some surrounding rocks formed a loose circle (Picture 9). The rock's self-stability was very poor in the loose zone, which caused adverse effects for cavern lining structure. To solve these problems, the construction party used self-drilling anchors to reinforce the loose circle and restore stability after releasing the stress.
Self-drilling anchors have the following characteristics:
1) Self-drilling anchor bar is made of high-strength steel, and continuous-wave thread conforms to international standards. Anchor bars can be cut and lengthened on request, and they can be used in a narrow space.
2) Self-drilling anchors combine drilling, grouting, and anchoring functions, which improves the anchoring efficiency. It does not need to take out after drilling, which solves the problem of hole collapse in unusual geology.
3) The hole collar plug makes the grouting pressure higher, and the slurry fully contacts the rock, which ensures reliable anchoring quality.
4) Easy installation and good anchoring effect not only improve construction efficiency but also reduce engineering costs.
Tunnel support adopted self-drilling anchors, not only effectively controlled the deformation and displacement of the surrounding rock but also greatly the integrity and stability, which provided a guarantee for the tunnel construction smoothly. This project provided a successful experience of using anchoring support in urban tunnels, which was worthy of promotion and application.
Sinorock has been focusing on the geotechnical anchoring industry for more than ten years and is an experienced anchoring products manufacturer. As the largest anchor support solution provider in China, Sinorock's vision is to meet customers' needs with professional service, solve problems in the anchor support project, and ensure the project construction smoothly.
latest news
-
- How to Use Self Drilling Rock Bolts in Tunnel and Mining Constructions?
- Time:2024-02-28From:This Site
- In the construction of excavation, such as tunnels, mining, and other underground projects, we have to support the soil and rock mass to ensure the people and equipment are safe. Generally, we use rock bolts to do this. Rock bolt has a long history of being used in tunnels and mines and now it is the turn of self-drilling rock bolts.
- View details
-
- 4 Advantages of Self-drilling Hollow Grouting Anchors compare with common Grouted Bolts
- Time:2024-02-23From:This Site
- Sinorock Self-drilling Hollow Grouting Anchors have the characteristics of fast construction speed, large anchoring force, good anti-corrosion performance, simple operation, and timely provision of anchoring force.
- View details
-
- Design and Introduction of Self Drilling Anchor Bolt in Geotechnical Engineering
- Time:2024-02-21From:This Site
- Self drilling anchor bolts are an important part of support system. Through anchor rods and cement grout consolidation, the retaining structure and rock and soil form a complex that works together. It not only improves the self-strength and self-stabilization ability of rock and soil, but also ensures the stability and safety of retaining structures.
- View details
-
- Celebrate the 74th anniversary of the founding of the People's Republic of China
- Time:2023-10-01From:This Site
- On October 1st every year, we observe the annual National Day, commemorating the birth of our beloved motherland.
- View details
-
- Happy Mid-Autumn Festival!
- Time:2023-09-29From:This Site
- The Mid-Autumn Festival which also known as the Mooncake Festival. This annual festival falls on the fifteenth day of the eighth month of the lunar calendar and is called the Mid-Autumn Festival because it falls in the middle of the three months of autumn.
- View details
-
- Quality Control, the Vital Factor of A SDA Bolt Factory
- Time:2022-07-22From:This Site
- The self-drilling rock bolts are applied to support the tunnels, reinforce the foundations, and stabilize the slopes that are in bad conditions. The constructio
- View details
-
- Sinorock is gearing up for The Mining Show 2023 in Dubai!
- Time:2023-10-25From:This Site
- Sinorock is preparing for an exciting adventure at The Mining Show 2023 in Dubai! Come visit us at Booth J64 on November 21-22 to discover our exceptional mining solutions and immerse yourself in the cutting-edge developments of the industry.
- View details
-
- Sinorock Excited to Attend the 28th Mining Metals Central Asian 2023
- Time:2023-09-05From:This Site
- Sinorock Excited to Attend the 28th Central Asian International Mining Exploration & Mining Equipment Exhibition in Almaty, Kazakhstan
- View details
-
- Sinorock Set to Make a Splash at Mongolia Mining 2023 International Mining & Oil Expo
- Time:2023-09-05From:This Site
- Sinorock is gearing up to participate in the prestigious Mongolia Mining 2023 exhibition, slated to take place in Ulaanbaatar from October 3rd to 5th.
- View details