Disclosed is a rope coring drill-based engineering geology drilling construction method. The method utilises a single-action dual-tube drill, a coring drill bit (15) is mounted on a lower end of an outer tube (14), a core tube (22) is mounted on a lower end of an elastic clamp (25), the elastic clamp (25) is suspended within an outer tube assembly (1), an upper end of the outer tube assembly (1) is connected to a power head of a drill machine via a drill rod, and the power head of the drill machine drives the drill rod to drive the coring drill bit (15) on the outer tube assembly (1) to rotate to cut rock and earth. After the drilling depth reaches the length of the core tube (22), a cylinder lifts up the whole drill a distance from the bottom of the hole so as to draw out a core, the drill rod is gripped and fixed via a holder of the drill machine, a rope coring extractor is dropped down, an inner tube assembly (2) filled with the core is extracted, and another inner tube assembly is placed into the outer tube assembly (1) for a next round of drilling. After the drilling reaches an expected drilling depth, the inner tube assembly (2) filled with the core is extracted, the drill rod and the outer tube assembly (1) remain motionless within the drill hole, and a standard penetrator (5) is connected via a test rod (3) and passes through the drill rod and the outer tube assembly (1) to the bottom of the drill hole. A top end of the test rod (3) is connected to a standard penetration hammer base (4), and a standard penetration hammer above the test rod (3) is used to strike the standard penetration hammer base (4), so as to perform a standard penetration test. After the standard penetration test is complete, a main hoisting machine is used to rapidly extract the standard penetrator.
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