What is an underground excavation project?

Underground excavation works include: pre-construction survey, support engineering, formation treatment, etc.

1. Pre-construction survey.

Underground excavation works require detailed investigation before construction, including investigation and analysis of geology, groundwater level, and surrounding environment. Through the investigation of the construction area, a suitable construction plan can be formulated, and the problems and risks that may be encountered can be provided as a scientific basis for construction.

2. Support engineering.

The underground excavation and renovations need to be supported to ensure the safety of construction. The support project includes two types: temporary support and permanent support. Temporary support is used during construction, mainly used to support the soil and prevent soil deformation, commonly used materials are wood, steel support, etc.

The permanent support is retained after the completion of the project, mainly used to ensure the stability and safety of the inner wall of the tunnel, and the commonly used materials are concrete, steel bars, etc.

3. Stratum treatment.

According to the geological conditions, the underground excavation project needs to carry out stratum treatment to ensure the stability of the soil during the excavation process. Formation treatment methods include reinforcement, grouting, bolting, etc. Reinforcement is mainly to prevent soil deformation or collapse by increasing the strength and stability of the soil.

Grouting is to inject a certain amount of grout into the soil to fill the soil voids and improve the strength and stability of the soil. Anchoring rod is to drive a certain number of anchor rods into the soil to fix the soil through anchoring to prevent the soil from deformation or collapse.

Precautions for undercover excavation works:

1. Preparation before construction.

Before carrying out the construction of the underground excavation project, sufficient preparation work is required. Including detailed survey, design, construction plan formulation, etc. It is necessary to understand the underground pipelines, geology, groundwater level and other conditions in the construction area, formulate a scientific, safe and effective construction plan, and do a good job in the training and drills of relevant personnel.

2. Safety measures during construction.

In the construction process of underground excavation projects, safety is the primary consideration. Effective safety and security measures must be taken to ensure construction safety. Including support, stratum treatment, groundwater treatment and other measures to ensure soil stability, tunnel inner wall safety, to prevent collapse, leakage and other problems.

At the same time, it is necessary to equip with necessary safety equipment and equipment to ensure the safety of construction personnel.

3. Quality requirements in the construction process.

In the construction process of underground excavation project, quality is a requirement that must be guaranteed. Effective quality management measures must be taken to ensure the quality of the project. Including the inspection of raw materials, the control of the construction process, the inspection of the quality of the project, etc.

The construction should be carried out in strict accordance with the relevant specifications and technical requirements to ensure that the quality of the project meets the design requirements and use requirements.