Building method and structure of sea bore preventing emergency gate

Abstract

The invention discloses a building method and a structure of a sea bore preventing emergency gate. A submerged orifice structure is adopted for the emergency gate, door headers corresponding to the positions of a downstream side water seal and a top water seal are arranged on the lower portion of the upstream side of a breast wall on the rear portion of the emergency gate, and it is only needed toseal the door header sections for the height of the gate. The height of the emergency gate is effectively reduced, the scale of the emergency gate and opening and closing equipment thereof can be greatly reduced while the water seal requirements during talus slide are met, and the investment is effectively reduced. The situation that air bag pressure is generated by slide gushing water, so that the gate structure is damaged can be effectively avoided. Air replenishing during dynamic water gate closing of the gate is facilitated, the vibration generated when the gate operates is relieved, andthe operating safety of the gate is effectively guaranteed. Meanwhile, air inlets and outlets in the upper portions of vent holes are higher than the maximum sea bore water level, the situation that the gushing water enters a passsageway from the vent holes, and airflow comes in and goes out from side holes of the breast wall can be effectively avoided, the safety of pedestrians on the upper portion of the breast wall is not affected, and the safety performance of the whole emergency gate is greatly improved.

Description

technical field [0001] The invention relates to a construction method and structure of a surge-proof accident gate, which belongs to the technical field of metal structures of water conservancy and hydropower projects. Background technique [0002] For hydropower projects with large landslide accumulations in the reservoir area, the working gates should have the function of preventing tide surges. In order to reduce the scale of the working gate, a breast wall is installed upstream of the working gate to block the tide surge. At the same time, considering that when the operation of the working gate fails, in order to prevent further expansion of the accident and to overhaul the working gate, an emergency gate is installed upstream of the parapet. If a fault occurs when the working gate is open and running, if a landslide occurs at this time, the opening time of the accident gate is generally longer, and the tidal water level has usually dropped, so the accident gate is usua...

AI Technical Summary

Problems solved by technology

If a fault occurs when the working gate is open and running, if a landslide occurs at this time, the opening time of the accident gate is generally longer, and the tidal water level has usually dropped, so the accident gate is usually designed according to the normal water level operation condition; Longer working gates and emergency gates are still likely to encounter tidal surges generated by accumulation landslides during the water blocking period. Because the tidal surge water level of accumulation body landslides is usually high, and some projects even reach more than 10m, the impact force generated If the accident gate with a relatively large water blocking time is designed according to the normal water level operating conditions, it will be damaged under the impact force of the water surge generated by the landslide tide and cause accident losses. Therefore, some projects consider bit design plane crash gate

The existing open-top emergency gates usually use upstream water stop. If the tide level is to be blocked, the height of the emergency gate should be considered according to the highest surge water level. If it is too large, the head on the door rail or the bent frame is too high. Not only is it too difficult to realize technically, but also the investment in building emergency gates and hoisting equipment needs to be greatly increased. Therefore, the existing technology is not perfect enough and needs to be further improved. improve

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