Structure for controlling crack generationgeneration in large-volume sluice gate and construction method therefor

A construction method for a structure for controlling crack generation in a large-volume sluice gate, wherein the structure for controlling crack generation in the large-volume sluice gate comprises:

• a sluice floor and a pier, wherein 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, wherein the at least one cavity is reserved in the process of pouring the concrete, and the at least one cavity is used as a self-restraint stress hole;
• and
• a tough material, wherein 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;
• wherein the construction method comprises the following steps:
• S1, performing construction preparation;
• S2, performing foundation treatment;
• S3, performing construction of the sluice floor, comprising:
• binding and installing sluice floor reinforcement bars, erecting a sluice floor formwork, concrete pouring, and forming the sluice floor;
• and
• S4, performing construction of the pier, comprising the following steps:
• S41, performing construction layout;
• S42, binding and installing pier reinforcement bars;
• S43, erecting a pier formwork above the sluice floor;
• S44, pre-embedding and installing a cavity-forming device at a designed position;
• S45, pouring the concrete, vibrating the concrete, and curing the concrete;
• and
• S46, after the concrete begins to set, extracting the cavity-forming device to form the at least one cavity in the pier, and filling the tough material in the at least one cavity for stress absorption;
• and
• wherein the cavity-forming device comprises an outer tube body, a bottom end of the outer tube body is connected to a bottom sealing plate, the bottom sealing plate defines at least one discharge port, an inner tube body is disposed in the outer tube body, and a bottom of the inner tube body is fixedly connected to a center of the bottom sealing plate;
• a space is formed between the inner tube body and the outer tube body and is used as a storage space for storing the tough material;
• an airbag capable of inflating and deflating is sleeved on the inner tube body, and the airbag is annular;
• an inner circumferential wall of the airbag is connected to the inner tube body;
• an air tube is disposed in the inner tube body, a bottom end of the air tube is connected with the airbag, and a top end of the air tube extends above a top of the outer tube body;
• an air tube is provided with a switch;
• and when the airbag is inflated, the airbag completely blocks the discharge port, when the airbag is deflated, the discharge port is opened to realize leakage of the tough material.