Construction method of rotary bored pile deep hole blasting and tube rotary excavation obstacle removal

Abstract

The invention discloses a construction method of rotary bored pile deep hole blasting and tube rotary excavation obstacle removal, and specifically discloses the steps of the construction method, including pre-construction preparation, surveying and positioning, blasting hole setting-out, drilling, charging, deep hole blasting, deslagging or tube rotary excavation obstacle removal, burying pile casings, injecting mud, drilling and excavating soil, primary hole clearing, putting reinforcement cages, inserting tubes, and secondary hole clearing. The construction method has the advantages of high construction speed, high construction quality and wide applicability to soil layers, and is often used as a preferred process during emergency rescue in case of damage of highways, railways and bridges.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a construction method for deep-hole blasting of cast-in-place piles by rotary digging and obstacle removal by rotary digging of conduits. Background technique [0002] With the rapid development of urban construction, pile foundations, especially cast-in-place concrete pile foundations, have become the main foundation type of modern buildings. Known as the "green construction technology", the technology of rotary drilling bored piles has been widely used in the design and construction of highway bridges, railways, water conservancy, urban construction, etc. at home and abroad because of its high efficiency, less pollution, and multiple functions. application. [0003] my country has a vast territory and complex geological conditions. It often encounters dense surrounding buildings, complex foundations, and old building (structure) foundations, which bring great dif...

AI Technical Summary

Problems solved by technology

Restricted by the construction strata, the rotary drilling rig is mainly suitable for soil layers, sand layers, and looser pebbles and gravel layers with smaller particle sizes. The drilling effect is best in cohesive soil layers, while in hard rock layers, denser The construction of pebbles and boulders and boulder layers is relatively difficult, and accidents in holes and mechanical accidents are prone to occur. A large number of rotary drilling rigs in my country have been used for a short time. At present, there are no hard rocks, boulders, or old buildings (structures) in pile foundation construction. Research and technology of deep hole controlled blasting and conduit rotary digging obstacle removal technology for building foundations, etc. that are difficult to drill into holes

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