Workshop structure for position above generator layer of underground powerhouse of hydropower station

Abstract

The invention discloses a workshop structure for the position above a generator layer of an underground powerhouse of a hydropower station, and belongs to the technical field of design and manufacturing of ancillary facilities of water conservancy and hydropower engineering. The workshop structure for the position above the generator layer of the underground powerhouse of the hydropower station is small in excavation difficulty and small in mutual interference degree of a building process and other kinds of construction work. The workshop structure comprises a steel framework system, a rail system and a protection system; the rail system is fixedly arranged on the upper middle portion of the steel framework system; the protection system is connected to the outer side of the steel framework system in a covering manner; and the workshop structure is fixedly connected with an external civil engineering foundation through the steel framework system.

Description

technical field [0001] The invention relates to a plant structure, in particular to a plant structure above the generator floor of an underground plant of a hydropower station, and belongs to the technical field of design and manufacture of auxiliary facilities of water conservancy and hydropower projects. Background technique [0002] In the caverns of underground powerhouses of traditional hydropower stations, the supporting structure of bridge cranes often adopts the rock wall crane beam structure, that is, the concrete crane beam is anchored to the rock wall through anchor rods or anchor cables. This structure can make full use of the bearing capacity of the surrounding rock , not only can reduce the excavation span of the underground cavern, which is conducive to the stability of the surrounding rock, but also the bridge crane can be put into operation earlier, which is beneficial to the excavation of the lower part of the plant and the progress of concrete and unit inst...

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Problems solved by technology

[0003] However, many years of practice have shown that the defects of the rock wall crane beams are also more prominent, mainly manifested in the high requirements for rock wall excavation, complex processes, and long construction periods. In some small and medium-sized power station caverns, due to limited space, construction interference is relatively large; secondly, the rock wall The crane girder is a large-volume structural concrete with a large amount of reinforcement. There are often temperature control requirements for concrete pouring. It is difficult to vibrate during pouring. Temperature cracks often appear in the later stage, and the workload of rework and repair is large.

The anchor cables and anchor rods of the cavern system in the area of ​​the rock wall crane beam are densely covered, which often conflict with the rock wall crane beam rods and cause the rods to be broken; thirdly, the concrete structure has poor adaptability to the deformation of the surrounding rock of the underground cavern, although a small amount of structural analysis cracks, but slight deformation of the surrounding rock can still cause cracks in the beam body, increasing the amount of repair work and subsequent maintenance work; finally, the rock wall crane beam separates the upper and lower spaces of the side wall. The drainage and ventilation pipes of the wall crane girder are easily blocked during the construction period, further increasing the difficulty of construction, and the maintenance during the operation period is difficult, and the actual operation effect is not satisfactory

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