After the incident occurred, the construction unit immediately launched an emergency plan, evacuated the surrounding crowds, set up a safety warning line, organized concrete backfilling, encrypted settlement monitoring points, and increased the monitoring frequency. At the same time, the situation will be reported to the Pearl River Delta Company.
As of 02:30 on the 25th, the surrounding houses and surface settlement were stable, and the concrete backfill was completed in the subsidence area. At the same time, the square floor tile laying and damaged drainage pipe repair work was started. There were no casualties in this subsidence. The situation on the spot is as follows:
According to the preliminary analysis by the construction unit, the cause of the subsidence of the ground surface is that during the construction of the shield pressure-preserving construction, due to the geological influence, the pressure-holding gas leaks rapidly in the formation, causing the ground to sink.
After in-depth communication between Guangdong Zhongtian Group and the construction party, in the next step, Zhongtian will order the construction party to take the following measures to ensure the safety of subsequent construction:
1. Expand the scanning range of geological radars, and combine the geological exploration holes to find out the softness of the stratum. If voids are found, grout backfilling is immediately adopted.
2. Strengthen the monitoring frequency of the geological conditions in the square area and arrange at least 4 monitoring densities per day.
3. Stop the tunneling construction until all relevant safety hazards are eliminated.
4. Research and develop stratum reinforcement measures and organize expert review.
5. Actively cooperate with Zhongtian to contact the affected merchants and properly handle related compensation matters.
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