Self-Drilling Anchor Bolt Construction in Complex Geological Slope
Time:2021-02-08From:sinorock View:
The P2 main tower of Dongshuimen Yangtze River Bridge is located between Changbin Road and Gang District Road. It is not only occupying the whole width of Gang District Road, but also half of the passage of Changbin Road. When the foundation was excavated, an 18m high face is formed. To prevent foundation damage, the side slope of Changbin Road is supported.
Through a detailed survey, the foundation slope stratum is mainly backfilled by sand pebbles, gravels, construction waste. During excavation, large mudstone aggregates appeared, and the rock strata were accompanied by irregular cracks and large cavities. The geological conditions in this area were complex and the construction safety risk was large.
Through a detailed survey, the foundation slope stratum is mainly backfilled by sand pebbles, gravels, construction waste. During excavation, large mudstone aggregates appeared, and the rock strata were accompanied by irregular cracks and large cavities. The geological conditions in this area were complex and the construction safety risk was large.

Based on the above analysis, combined with the situation of loose and broken strata and difficult form holes, the temporary protection measures of self-drilling hollow anchors and welded mesh shotcrete are proposed for foundation protection. Self-drilling hollow anchor bolt is composed of drill bit, hollow bar, plate, nut, centralizer and coupler.
By calculating the force value, contractor adopted φ32mm self-drilling anchor bolt for grouting and anchoring. The lengths are 15m in 3 rows, 12m in 2 rows and 8m in 3 rows respectively. Steel bar welded mesh is placed on the slope with φ6.5*100 * 100mm. Finally, spray C20 concrete. Before shotcrete, drainage holes with a spacing of 3.0m and φ50mm were reserved on the slope.
During construction, self-drilling hollow anchor bolt integrates drilling, grouting and anchoring functions, which significantly improves drilling efficiency. And under the action of pressure pump, the grouting in the rock strata and voids is full, which ensures the grouting thickness and anchoring effect.
Data show that there is no displacement of foundation during construction. It shows that the construction scheme of Φ32mm self-drilling hollow anchor bolt and steel bar welded mesh grouting has successfully completed the excavation and protection of the main tower foundation while ensuring the safe operation of vehicles on Changbin Road.
By calculating the force value, contractor adopted φ32mm self-drilling anchor bolt for grouting and anchoring. The lengths are 15m in 3 rows, 12m in 2 rows and 8m in 3 rows respectively. Steel bar welded mesh is placed on the slope with φ6.5*100 * 100mm. Finally, spray C20 concrete. Before shotcrete, drainage holes with a spacing of 3.0m and φ50mm were reserved on the slope.
During construction, self-drilling hollow anchor bolt integrates drilling, grouting and anchoring functions, which significantly improves drilling efficiency. And under the action of pressure pump, the grouting in the rock strata and voids is full, which ensures the grouting thickness and anchoring effect.
Data show that there is no displacement of foundation during construction. It shows that the construction scheme of Φ32mm self-drilling hollow anchor bolt and steel bar welded mesh grouting has successfully completed the excavation and protection of the main tower foundation while ensuring the safe operation of vehicles on Changbin Road.
latest news
-
- How To Support The Tunnel Pass Through Cobble Layer? Self-drilling Anchor Bolt Support Method
- Time:2023-02-25From:This Site
- How to support the tunnel pass through cobble layer? Self-drilling anchor bolts can be used for support. It can solve the construction problems encountered when the tunnel passes through the cobble layer by drilling preparation, drilling and grouting, coupling the anchor bars, and pull-out test.
- View details
-
- What Is Soil Nailing?Stabilization of Slope in Loose Soil Using Soil Nails
- Time:2023-02-22From:This Site
- soil nailing system repair unstable natural slope, or build a new or existing ultra-steep slope with closely spaced steel inclusions. self drilling anchor bolts used as soil nails are widely used slope stabilization.
- View details
-
- 3 Types of Self Drilling Soil Nailing Construction Equipment
- Time:2023-02-18From:This Site
- In the traditional sense, steel bars are often used as soil nails, so the supporting construction equipment is relatively mature. So what construction equipment is there for self-drilling soil nailing? Next, Sinorock will introduce the equipment used for self-drilling anchor bolts as soil nails.
- 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
-
- Spring Day Celebrations
- Time:2021-04-30From:This Site
- In this spring season, do everything that makes us happy. In any case, we should enjoy life.
- View details
-
- A Meaningful Christmas Day - Decorating Christmas Tree with Colleagues
- Time:2020-12-25From:This Site
- The Christmas party is a staple of office life-a way for teammates to socialize in a non-work setting. We had a pleasant and meaningful day. We decorated the Christmas tree together.
- View details
-
- SINOROCK Will Attend CONEXPO-CON/AGG 2023
- Time:2023-02-14From:This Site
- CONEXPO-CON/AGG 2023 will be held during 3/14-3/18 2023. Sinorock will attend with our proud products self-drilling achor bolt system and other anchoring products. Welcome to visit!
- View details
-
- Sinorock is attending Philconstruct Manila 2022
- Time:2022-10-19From:This Site
- Philconstruct Manila 2022 will be held during 11/03-11/06 2022. Sinoroc will attend with our proud products self-drilling achor bolt system and other anchoring products. Welcome to visit!
- View details
-
- Sinorock Will Attend 2022 Bauma CTT Russia Expo Trade Fair in Mosco
- Time:2022-05-12From:This Site
- Sinorock will attend the 22nd Bauma CTT Russia Expo on May 24-27, 2022. Check the detail information below: Booth Number: Exhibition Hall 13, 528Address: Crucos
- View details