Stair vibration isolation structure suitable for pumped storage power station plant

Abstract

The application provides a stair vibration isolation structure suitable for a pumped storage power station plant, which comprises a plant structure and a stairwell structure arranged in the plant structure, a plant structure column is arranged in the plant structure, and a plurality of plant structure plates forming each floor are arranged on the plant structure column; a hollow part is arranged in the plant structure plate along the laying direction of the stairwell structure; a partition space is arranged between the stairwell structure and the hollow part, and an anti-vibration joint part is arranged at the side end of the hollow part of the plant structure plate, so that the plant structure and the stairwell structure form an independent bearing state. The application can cut off the influence of the operation of the pumped storage unit on the weak structure of the plant, reduce the anti-vibration technical difficulty of the weak structure, and greatly improve the operation environment of the plant traffic passage.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of industrial anti-vibration technology, in particular to a stair vibration isolation structure suitable for use in a pumped storage power station plant. BACKGROUND

[0002] At present, the pumped storage business is developing rapidly in China, and the pumped storage unit requires a large suction height. Therefore, the plant type is mainly underground. In order to reduce the construction investment and construction difficulty of underground chamber, the equipment in the underground plant is arranged more concentratedly and compactly, and the auxiliary equipment is arranged close to the unit. The effective height of each functional layer in the plant reaches 30m, and a necessary vertical traffic passage, i.e. a stair structure, needs to be arranged. The pumped storage power station has the characteristics of high water head, large speed and bidirectional water flow operation. The corresponding vibration includes hydraulic, electrical and mechanical excitation vibration, and the induced structure vibration problem is complex. When the plant structure is designed, the stiffness requirement of vibration control is fully considered, and the section of the main structure is relatively large. In comparison, the stair structure is extremely thin.

[0003] The anti-vibration of the pumped storage power station plant is the design focus. The more common anti-vibration design principle is to control the vibration response of the unit section, and to increase the stiffness of the structure. The thickness of the stair plate of many power stations has been increased to 250mm, and the section of the stair column is also increased. A large number of operation experiences and test results of pumped storage power stations show that the stair structure is a vibration body that is easily induced, and the vibration response of the corresponding stair railing is obvious. As the main traffic passage in the power station, the operation personnel can obviously perceive it, and the position of the stair plate with poor anti-seismic effect in individual projects can cause the operation personnel's feet to be numb. SUMMARY

[0004] The purpose of the present application is to provide a stair vibration isolation structure with excellent shock absorption effect and independent bearing.

[0005] To this end, the present application adopts the following technical solutions:

[0006] A stair vibration isolation structure suitable for use in a pumped storage power station plant, comprising a plant structure and a stairwell structure arranged inside the plant structure. Plant structure columns are arranged in the plant structure, and a plurality of plant structure plates forming each floor are arranged on the plant structure columns. A hollow portion is arranged in the plant structure plate along the laying direction of the stairwell structure. A partition space is provided between the stairwell structure and the hollow portion, and an anti-vibration joint portion is arranged at the side end of the hollow portion of the plant structure plate, so that the plant structure and the stairwell structure form an independent bearing state at the same time. Meanwhile, a cross beam is arranged at the bottom of the plant structure plate, so that the independent plant structure plate is in a stable state.

[0007] Further, the stairwell structure comprises a stair column arranged vertically in the hollow part, and divides the stairwell structure into an upper part and a lower part, the upper part is provided with interconnected stair plates and stair beams on the stair column, and the lower part is provided with a stair column foundation at the connecting part between the stair column and the rock mass.

[0008] Further, a factory building structure bottom plate is arranged at the bottom of the factory building structure, and a foundation pit is arranged through the factory building structure bottom plate; a first anti-vibration joint is arranged between the foundation pit and the stair column foundation.

[0009] Further, a connecting reinforcing bar is arranged between the stair column foundation and the rock mass.

[0010] Further, a second anti-vibration joint is arranged between the factory building structure plate and the upper part.

[0011] Compared with the prior art, the present application has the following beneficial effects:

[0012] The present application comprehensively considers the layout of pumped storage underground power house, the type of power house structure, the vibration transmission path, the construction condition, the engineering investment and the like, and provides the stair anti-vibration structure, which can cut off the influence of the operation of the pumped storage unit on the weak structure of the power house, reduces the anti-vibration technical difficulty of the weak structure, and greatly improves the operation environment of the power house traffic passage. Moreover, the present application is arranged to be disconnected between the stairwell structure and the surrounding main structure, that is, "two independent load bearing, mutual influence", the so-called independent load bearing, relative to the supporting structure of the stairwell structure, the stair column and the factory building structure column are separately arranged, which are two independent load bearing systems, and the load bearing characteristics of the two are clear and explicit. Meanwhile, the stair column foundation and the factory building structure bottom plate are also disconnected. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a schematic diagram of the plane layout structure of the upper part of the present application;

[0014] Figure 2 It is a schematic diagram of the plane layout structure of the bottom part of the present application;

[0015] Figure 3 It is a schematic diagram of the structure at A-A of the present application;

[0016] Figure 4 It is a schematic diagram of the structure at B-B of the present application.

[0017] The marks in the drawings are: factory building structure column 1, stair column 2, stair column foundation 3, anti-vibration joint part 5, foundation pit 6, connecting reinforcing bar 7, cross beam 8, factory building structure plate 9, stair plate 11, stair beam 12. DETAILED DESCRIPTION

[0018] The application will be further described in connection with the accompanying drawings and embodiments, but not as the basis for limiting the application.

[0019] As Figures 1-4 shown, a stair vibration isolation structure suitable for pumped storage power station plant, comprising a plant structure, and a stairwell structure arranged inside the plant structure, a plant structure column 1 is arranged in the plant structure, and a plurality of plant structure plates 9 forming each floor are arranged on the plant structure column 1; a hollow part is arranged in the plant structure plate 9 along the direction of the stairwell structure; there is a partition space between the stairwell structure and the hollow part, and an anti-vibration joint part 5 is arranged at the side end of the hollow part of the plant structure plate 9, so that the plant structure and the stairwell structure form an independent load-bearing state at the same time; at the same time, a cross beam 8 is arranged at the bottom of the plant structure plate 9, so that the independent plant structure plate 9 is in a stable state.

[0020] This embodiment is based on the plant structure type according to the layout conditions of the pumped storage power station plant; for the stair structure of the typical weak part, and fully reduces the construction difficulty, the stair vibration isolation structure is provided. By arranging the stairwell structure and the surrounding main structure separately, the stairwell structure can be designed according to the load-bearing requirements.

[0021] Specifically, the cross beam 8 can improve the weakening of the hollow part of the stairwell to the plant structure, so the cross beam 8 is arranged around the stairwell structure to improve the local vibration characteristics of the plant structure.

[0022] Preferably, the joint width of the anti-vibration joint part 5 is 5 cm, and the joint is filled with flexible rubber material.

[0023] As Figures 1-3 shown, the embodiment also provides a stairwell structure, which comprises a stair column 2 arranged vertically in the hollow part, and divides the stairwell structure into an upper part and a lower part, the upper part is provided with stair plates 11 and stair beams 12 connected to each other on the stair column 2, and the lower part is provided with a stair column foundation 3 at the connection part of the stair column 2 and the rock mass. The stairwell structure of each layer of stair plates 11, stair beams 12 and the like is only structurally connected with the stair column 2. The stair plates 11 and stair beams 12 are arranged staggered along the direction of the stair column 2, so that part or all of the stair plates 11 can be flush with the plant structure plate 9 of the corresponding floor height.

[0024] As Figures 1-4As shown, the embodiment combines the arrangement of the factory building structure, arranges the stairwell structure in a small bearing area (the planar local area is rectangular), not only separates the stairwell structure from the factory building structure, but also avoids the vibration transmission of the structure foundation, the bearing structure stair column foundation 3 of the stair and the periphery of the factory building structure bottom plate 4 do not affect each other, realizes the clear bearing boundary of the stairwell structure, only needs to design the structure according to the normal use function of the stair, avoids the connection of the stairwell structure and the factory building structure, and cuts off the vibration influence of the factory building structure on the stair structure.

[0025] Specifically, the factory building structure bottom is provided with a factory building structure bottom plate 4, and a foundation pit 6 is arranged in the factory building structure bottom plate 4.

[0026] Specifically, the factory building structure plate 9 is provided with a second anti-vibration joint 52 between the factory building structure plate 9 and the upper layer part.

[0027] The foundation pit 6 is arranged at the position of the factory building structure bottom plate 4 corresponding to the stair column 2 (the size of the foundation pit 6 is determined in combination with the load of the stair), and after the factory building structure bottom plate 4 is poured and completed, the stair column foundation 3 and the stair column 2 are constructed.

[0028] The anti-vibration joint part 5 is arranged at the space part separated by the stair column 2, the stair plate 11 and the stair beam 12 and the factory building structure. The stairwell structure and the surrounding factory building structure are separated, and do not affect each other.

[0029] Specifically, the connecting reinforcing bar 7 is arranged between the stair column foundation 3 and the bedrock, so that the constraint of the stair column foundation 3 can be improved.

[0030] Please refer to Figures 1-4 When the stairwell structure is arranged in the factory building structure, the specific mode is as follows:

[0031] When the factory building structure is constructed, the corresponding implementation of the factory building structure column 1, the factory building structure plate 9 and the factory building structure bottom plate 4 in the factory building structure is completed first, the foundation pit 6 is arranged at the position of the factory building structure bottom plate 4 corresponding to the stair column 2 according to the design requirements of the stairwell structure, and the first anti-vibration joint 51 is arranged, so that the construction of the stair column 2, the stair plate 11 arranged on the stair column 2 and the stair beam 12 arranged on the stair plate 11 is sequentially completed, and the second anti-vibration joint 52 is arranged on the factory building structure plate 9, so that the stairwell structure and the factory building structure are completely cut off.

[0032] The above embodiment is only one of the preferred technical solutions of the present application, and those skilled in the art should understand that the technical solutions or parameters in the embodiment can be modified or replaced without departing from the principles and essence of the present application, and all should be covered within the protection scope of the present application.

Claims

1. A staircase vibration isolation structure applicable to the powerhouse of a pumped storage power station, comprising a powerhouse structure and a stairwell structure disposed within the powerhouse structure, wherein a powerhouse structural column (1) is disposed within the powerhouse structure, and a plurality of powerhouse structural slabs (9) forming each floor are disposed on the powerhouse structural column (1); characterized in that: A hollow section is provided inside the factory building structural slab (9) along the laying direction of the stairwell structure; The stairwell structure and the hollow part have a partition space, and thus a vibration-resistant joint (5) is set at the side end of the hollow part of the factory building structure slab (9), so that the factory building structure and the stairwell structure can simultaneously form an independent load-bearing state. Meanwhile, a crossbeam (8) is installed at the bottom of the factory building structure slab (9) to make the independent factory building structure slab (9) stable; The stairwell structure includes stair columns (2) erected in the hollow part, and the stairwell structure is divided into upper and lower components. The upper component is provided with stair slabs (11) and stair beams (12) connected to each other on the stair columns (2). The lower component is provided with stair column foundations (3) at the connection between the stair columns (2) and the rock mass. The bottom of the factory building structure is provided with a factory building structure base plate (4), and a foundation pit (6) is provided through the factory building structure base plate (4). The foundation pit (6) and the stair column foundation (3) are provided with a first vibration joint (51); Connecting reinforcing bars (7) are provided between the stair column foundation (3) and the rock mass.

2. The vibration isolation structure for stairs in a pumped storage power station building according to claim 1, characterized in that: The factory building structural slab (9) has a second vibration-resistant joint (52) between it and the upper component.

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