Hectometer-level ultra-deep underground diaphragm wall body quality drilling coring detection method

Abstract

The invention relates to a hectometer-level ultra-deep underground diaphragm wall body quality drilling coring detection method. The detection method comprises the following steps: pre-burying a steel pipe in an underground diaphragm wall, lowering the steel pipe along with a reinforcement cage, and enabling the burying depth of the steel pipe to be higher than that of a wall body detection part of the underground diaphragm wall; and after the concrete pouring of the underground diaphragm wall is completed and the design strength is reached, a drill bit of a drilling machine performs drilling coring detection on the wall body of the deep part of the underground diaphragm wall through the embedded steel pipe. Due to the fact that the grooving depth of an existing ultra-deep underground diaphragm wall breaks through the hectometer level, the deepest grooving depth reaches 150 meters, the perpendicularity of conventional drilling and coring mechanical equipment cannot be matched with the hectometer-level depth, and deflection, collision of underground diaphragm wall steel bars and even drilling through of a wall body of the underground diaphragm wall occur in the drilling process. The method has the advantages that the drilling detection efficiency is high, the damage to the underground diaphragm wall structure is small, and the purpose of performing drilling coring detection on the wall body of the ultra-deep underground diaphragm wall (the depth is larger than or equal to 100 meters) is achieved.

Description

technical field [0001] The invention relates to the field of underground engineering construction quality detection, in particular to a method for detecting the quality of an ultra-deep underground continuous wall by drilling and coring. Background technique [0002] Since the trenching depth of the ultra-deep underground diaphragm wall has exceeded 100 meters at present, and the deepest trenching depth is 150 meters, the verticality of conventional drilling and coring mechanical equipment cannot match the depth of 100 meters, and it is prone to deflection during the drilling process , collide with the steel bar of the underground diaphragm wall, or even drill through the wall of the underground diaphragm wall, which affects the construction efficiency of drilling and coring and the structural quality of the ultra-deep diaphragm wall, and cannot smoothly drill the ultra-deep diaphragm wall (depth ≥ 100 meters) Hole coring inspection. Contents of the invention [0003] In ...

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Problems solved by technology

[0003] In order to overcome the disadvantages of low construction efficiency and easy damage to the structure of the underground diaphragm wall in the traditional drilling and coring detection method, the present invention provides a method for detecting the quality of the ultra-deep underground diaphragm wall by drilling and coring. The method has the following advantages: Drilling and coring detection efficiency is high, and the damage to the underground diaphragm wall structure is small, and the purpose of drilling and coring detection of ultra-deep underground diaphragm walls (depth ≥ 100 meters) is realized

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