Novel steel pipe pile bed rock drilling anchoring method

Abstract

The invention relates to the field of steel pipe pile anchoring, in particular to a novel steel pipe pile bed rock drilling anchoring method. The novel steel pipe pile bed rock drilling anchoring method comprises the following steps that a trestle or platform close to the thick part of a shoreside riverbed covering layer is constructed first, bridge deck slabs are laid, and an operation platform is formed; a steel pipe is placed downwards through the operation platform, an operation space is formed by the steel pipe placed downwards first, anchor rod holes are drilled in bed rock under the steel pipe through a construction casing pipe drill, anchor steel bars are placed downwards after the anchor rod holes are drilled, grouting consolidation is conducted, the steel pipe is backfilled with macadam or concrete to form an anchoring body achieving the combined effect of the anchor steel bars and the steel pipe, and then a stabilizing effect is achieved. According to novel steel pipe pile bed rock drilling anchoring method, anchoring operation can be conducted through multiple drilling machines simultaneously, the construction progress is guaranteed, input is low, little load is added to a temporary power utilization line, and the line does not need to be specially arranged.

Description

technical field [0001] The invention relates to the field of steel pipe pile anchorage, in particular to a novel steel pipe pile bedrock drilling and anchorage method. Background technique [0002] When a railway or highway bridge crosses a waterway or a port, it is necessary to build trestle bridges and water work platforms and other wading structures in shoals with thin covering layers or even no covering layers or shallow waters with pebbles under the riverbed. Most of the buildings use various types of steel pipe piles as the foundation, and the steel pipe piles cannot be driven into the bedrock below the overburden layer. During construction, it is often encountered that the steel pipe piles are not driven deep enough to meet the anti-scouring requirements. At this time, the steel pipe pile needs to be anchored at the bottom of the pile. In most cases, the pile bottom anchorage needs to be punched with a percussion drill, and then the steel pipe pile is driven into the ...

AI Technical Summary

Problems solved by technology

[0002] When a railway or highway bridge crosses a waterway or a port, it is necessary to build trestle bridges and water work platforms and other wading structures in shoals with thin covering layers or even no covering layers or shallow waters with pebbles under the riverbed. Most of the buildings use various types of steel pipe piles as the foundation, and the steel pipe piles cannot be driven into the bedrock below the overburden layer. During construction, it is often encountered that the steel pipe piles are not driven deep enough to meet the anti-scouring requirements. At this time, the steel pipe pile needs to be anchored at the bottom of the pile. In most cases, the pile bottom anchoring operation needs to be punched with a percussion drill, and then the steel pipe pile is driven into the pile and concrete is poured into the pile.

However, the problems existing in the method of "percussion drilling, punching and anchoring" are as follows: 1) It is necessary to use a percussion drilling rig, which increases the investment in mechanical equipment, and the drilling rig needs to repeatedly enter and exit the working face, which increases the cross-operation process and increases the safety risk; 2) it must be erected There are high safety risks during impact construction, most of which are high-altitude operations, which require precise alignment and difficult construction; 3) Only one hole position can be impacted at a time, and the next one can be constructed after completion The hole position takes a long time, and the rest of the construction process needs to wait during the impact construction

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