High-pressure mortar pile anchor foundation treatment method

Abstract

The invention discloses a high-pressure mortar pile anchor foundation treatment method. The high-pressure mortar pile anchor foundation treatment method comprises the steps that immersed pipes are inserted into a soil body, and grouting pipes are tripped into the immersed pipes; then sand materials are put into, the pipes are pulled out to form sand piles, and the grouting pipes are left in the sand piles; grouting anchors are planted from the tops of the sand piles to a building foundation on the side needing to be protected in an umbrella rib mode; the tops of the sand pipes are sealed; twotimes of grouting are conducted sequentially on the sand piles through the grouting pipes and the grouting anchors, and grout splits off the soil body to form tree-root-shaped cement mortar piles; anddouble-row connecting rebars are arranged between the multiple sand piles, and the connecting rebars, the umbrella-rib-shaped grouting anchors, the immersed pipes and the grouting pipes are welded together to be locked, so that a pile anchor whole is formed. According to the high-pressure mortar pile anchor foundation treatment method, high-pressure grouting is conducted on pile bodies, grout bodies form the tree-root-shaped pile bodies along with soil body cracks, so that the pile bodies and the soil body are tightly combined together just like a tree root, the pile body supporting and protecting functions of the piles are improved, the seepage proofing and water proof effect and the range of the piles are greatly improved compared with a traditional construction method of the same kind,the application range is wide, and the high-pressure mortar pile anchor foundation treatment method can be applied to foundation pit supporting and slope engineering.

Description

technical field [0001] The invention belongs to the technical field of foundation treatment, and in particular relates to a method for treating a high-pressure mortar pile-anchored foundation. Background technique [0002] In foundation treatment construction, vacuum preloading is often used. During the process of vacuum preloading, foundation settlement and cracks often occur within 10 to 20 meters around the preloading construction area, which will cause destructive effects on surrounding buildings. Therefore, it is necessary to take measures for reinforcement and protection. [0003] Sand piles, also known as compacted sand piles or sand pile compaction methods, refer to the method of forming holes in weak foundations by means of vibration, impact or water flushing, and then squeezing sand into the soil to form dense sand columns with large diameters. method of ground reinforcement. Sand pile is a kind of composite foundation of loose pile, which is suitable for foundat...

AI Technical Summary

Problems solved by technology

The weak point of this method is: 1, its compressive strength of pile itself is limited, can not exist as the form of building pile foundation, can only be used as pile-soil composite foundation; 2, the flexural strength of pile itself is not high, as When supporting the foundation pit, usually due to the insufficient flexural strength of the pile body, it needs to be designed as multi-row pile support, resulting in the limitation of its application; Overlap and overlap, resulting in a very small pile spacing, a substantial increase in the number of piles and construction costs

Images