Abstract: A tubular storage and filling device for hydraulic mass concrete and its application are provided. The device includes an outer tube body, and a bottom end of the outer tube body is connected to a bottom sealing plate defining a discharging port. An interior of the outer tube body defines a storage space for storing materials. A gas pipe is disposed in the outer tube body and is connected to an inflatable and deflatable airbag. The gas pipe is equipped with a switch. The device further includes an inner tube body sleeved within the outer tube body, a supporting piece disposed at the bottom of the outer tube body, and a connecting piece and a pressing piece positioned above the inner tube body for positioning the filling body. The device can be widely applicable to mass concrete projects, enables simultaneous filling during hole formation, broad applicability, and ensures structural integrity.

Abstract: Provided are a structure for controlling crack generation in a large-volume sluice gate and a construction method therefor. The structure includes: a sluice floor and a pier, the sluice floor and the pier are formed by a process of pouring concrete, and the pier is disposed above the sluice floor; at least one cavity, defined in the pier, the at least one cavity is reserved in the process of pouring the concrete, and the at least one cavity serves as a self-restraint stress hole; and a tough material, the tough material is configured for stress absorption, the tough material is filled in the at least one cavity, and the tough material is integrated with an inner wall of the at least one cavity. The construction method includes: performing construction preparation; performing foundation treatment; performing construction of the sluice floor; and performing construction of the pier.

Abstract: An optical detector measuring a movement of an object in a space on a measurement axis comprises a light source, a reflective portion, a detection unit and a converting unit. The light source comprises a resonance chamber, the light source emitting a laser beam toward the object, the laser beam contacting the object and generating a first scattering beam and a reflection beam, wherein a part of the first scattering beam enters the resonance chamber. The reflective portion reflects the reflection beam toward the object, the reflection beam re-contacting the object and generating a second scattering beam and a sub-reflection beam, wherein a part of the second scattering beam and the sub-reflection beam enter the resonance chamber. The detection unit measures an optical-electrical variation in the resonance chamber to generate an electric signal. The converting unit converts the electric signal to a movement on the measurement axis in the space.