Zhong Da Consulting has compiled the knowledge of architectural knowledge column of this website, and the basic overview of earthwork backfilling of foundation pit is as follows:
What is foundation pit excavation?
Foundation pit excavation refers to the setting of pipe well points for dewatering, so as to facilitate excavation personnel and mechanical operations and soil loading and unloading and transportation. Excavate the top floor within 6.0m with a long arm excavator. During the excavation, cooperate with the small loader to push the earthwork far away from the excavator into the working range of the excavator.
What is earthwork excavation?
Earthwork excavation is a key process in the initial stage of the project and even in the construction process. Loosening, crushing, excavation and transportation projects of soil and rock. According to the geotechnical properties, earthwork excavation is divided into earthwork excavation and stone excavation. According to whether the construction environment is open-air, underground or underwater, it can be divided into open excavation, hole excavation and underwater excavation. In water conservancy projects, earthwork excavation is widely used in site leveling and slope cutting, and foundation excavation of hydraulic structures (sluice, dam, spillway, hydropower plant, pumping station building, etc.). ), underground cavern excavation (hydraulic tunnel, underground powerhouse, various flat tunnels, shafts and inclined shafts), river course, channel excavation and dredging, packing, building stone, concrete aggregate mining, cofferdam or temporary buildings such as masonry and concrete.
Basic survey of earthwork foundation pit excavation:
Foundation pit is a soil pit excavated at the design position of foundation according to the foundation elevation and plane size. Before excavation, the excavation scheme shall be determined according to geological and hydrological data and the situation of buildings near the site, and waterproof and drainage work shall be done well. If the excavation is not deep, the slope can be placed to stabilize the soil slope, and the slope size is determined according to the relevant engineering regulations. Deep foundation pits and adjacent buildings can be protected by foundation pit wall protection method and shotcrete wall protection method, and large foundation pits even use underground continuous wall and column bored pile chain method to prevent the collapse of outer soil layer; If there is no impact on nearby buildings, well point method can be used to reduce the groundwater level, and slope excavation can be used; In cold areas, natural air conditioning freezing method can be used for excavation.
For more information about bid writing and improving the winning rate, click on the bottom customer service for free consultation.