Construction method of novel vertical shaft horizontal rotation jet grouting pile foundation pit sealing bottom water-resisting layer

Abstract

The invention belongs to the technical field of construction engineering and particularly relates to a construction method of a novel vertical shaft horizontal rotation jet grouting pile foundation pit sealing bottom water-resisting layer. The method includes: a vertical shaft is disposed on the periphery of a foundation pit, and a horizontal rotation jet grouting pile sealing bottom is radially constructed in the vertical shaft to serve as the foundation pit bottom horizontal water-resisting layer. The method has the advantages that the foundation pit bottom horizontal water-resisting layer is disposed manually, the foundation pit bottom horizontal water-resisting layer and a foundation pit lateral wall water stopping curtain form a sealed water resisting system, precipitation in the pit is achieved, continuous precipitation out of the pit is avoided, water resource waste is reduced, and the method is significant to spring water protection of the spring city.

Description

technical field [0001] The invention belongs to the technical field of construction engineering, and in particular relates to a construction method for a novel bottom-sealing water-resisting layer of a vertical shaft horizontal jet grouting pile foundation pit. Background technique [0002] In traditional deep foundation pit dewatering, vertical water-stop curtains are generally installed on the side walls of the foundation pit. After the water-stop curtain and the base water-resisting layer form a closed water-proof system, the groundwater within the foundation pit and the groundwater outside the pit have no hydraulic connection, and become To form static water, as long as the groundwater above a certain depth below the bottom of the pit is pumped according to the needs, the pit can be dewatered to ensure the safety of the foundation pit project. However, karst fissure water is widely distributed in the spring area of ​​Jinan, and the karst channels in the basement are compl...

AI Technical Summary

Problems solved by technology

[0002]The traditional deep foundation pit dewatering generally adopts the vertical water-stop curtain on the side wall of the foundation pit. After the water-stop curtain and the base water-resisting layer form a closed water-proof system, The groundwater within the scope of the foundation pit has no hydraulic connection with the groundwater outside the pit and becomes static water. As long as the groundwater above a certain depth below the bottom of the pit is pumped according to the needs, the water in the pit can be dewatered to ensure the safety of the foundation pit project. However, in Jinan Spring Karst fissure water is widely distributed in the region, and the karst channels in the basement are complex and sometimes the water-resisting layer is thin, and the basement water-repelling effect is poor. The traditional deep foundation pit dewatering method cannot achieve its due effect. Using the method of water-stop curtain on the side wall of the foundation pit + simultaneous precipitation inside and outside the pit, the water conservancy slope formed meets the requirement that the groundwater level is lower than the bottom of the pit. Resources have caused a huge waste, which has brought huge hidden dangers to the protection of spring water in Jinan area. Therefore, the above two commonly used foundation pit precipitation methods have disadvantages in Jinan area

Images