H-shaped steel foundation pit support device with grouting small conduit resisting soil lateral pressure

Abstract

The invention discloses an H-shaped steel foundation pit supporting device with small grouting ducts resisting lateral earth pressure to be mainly used for foundation pit supporting in the field of building construction. The supporting device is mainly composed of piles 1, segmentation steel sheet piles 2, waterstop air bags 3, U-shaped grooves 4, sealing rods 5, waterstop grooves 6, holes 7, the small grouting ducts 8 and anchor devices 9. The multiple piles 1 are driven into underground designed elevation positions from the ground one by one through a pile driver according to design requirements; then the segmentation steel sheet piles 2 of all the piles 1 are pressed in through special pile pressing equipment, so that a first supporting section is formed, deep earthwork of the first section is excavated, and the small grouting ducts 8 are installed and used for grouting; afterwards, a second section of earthwork is excavated, the cycle of construction is repeated until foundation pit supporting is completed; and the segmentation steel sheet piles 2 and the piles 1 are pulled out in sequence, and the supporting system is dismantled.

Description

technical field [0001] The invention is mainly used for excavation and support of foundation pits in the field of construction engineering. Background technique [0002] The current excavation and support methods for deep foundation pits in my country generally include: underground diaphragm wall, cast-in-situ pile, SMW pile, steel sheet pile, section steel pile, etc. The support depth of the underground diaphragm wall is large, and the water-stop effect is good, but the construction period is long, the cost is the highest, and it cannot be reused; The protection depth is relatively large, and the water-stop effect is good. The section steel can be pulled out and reused, but the deep mixing pile cannot be pulled out, and the cost is still high. Or the pebble interlayer cannot be driven in, the applicable strata are limited, and the driving depth is limited; the steel piles are easy to drive in, can be reused, and the construction period is short, but they have no water-stop...

AI Technical Summary

Problems solved by technology

The support depth of the underground diaphragm wall is large, and the water-stop effect is good, but the construction period is long, the cost is the highest, and it cannot be reused; The protection depth is relatively large, and the water-stop effect is good. The section steel can be pulled out and reused, but the deep mixing pile cannot be pulled out, and the cost is still high. Or the pebble interlayer cannot be driven in, the applicable stratum is limited, and the driving depth is limited; the steel pile is easy to drive in, can be reused, the construction period is short, but it has no water-stop function

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