Application and Research of Multiple Support Types in the Combination of Deep Foundation Pits

We are studying the foundation pit support technology is currently the most common engineering problem in foundation pit engineering, and this is very important for the selection of support structure. We found that construction techniques such as soil-nailed walls, cast-in-place piles, triaxial cement mixing piles, row piles, anchors (rods), deep well dewatering, and internal support in foundation pits are more common construction methods in deep foundation pit support technology. During the design and construction process, according to the different environmental conditions, engineering geological conditions and support requirements of the construction site, we can flexibly adopt a variety of support types to form a safe and reliable support system. Using this method can ensure the foundation pit is opened. Safety during digging. We found in the project an example of the design of the full-type technology of the support group of “filled pile + internal support”. We applied the rational foundation pit algorithm to the excavation process of the soft soil deep foundation pit under the row pile support. The variation of the moment of the pile body, the lateral deformation of the pile body and the ground settlement around the foundation pit due to excavation were analyzed. In the project, we combined the monitoring information of the foundation pit, and the experimental results resulted in this type of support combined support technology. In the foundation pit support technology, the limited deformation results are good, and the impact on the surrounding foundation is small. Studies have proved that this technology can provide a reference for similar engineering practices, and the technology has practical research significance.