Water inlet and outlet trash rack platform structure combined with construction temporary road

Abstract

The utility model discloses a water inlet and outlet trash rack platform structure combined with a construction temporary road, which comprises a platform dug below the road, backfill rock ballast, platform concrete and a concrete retaining wall, a slope reaching the lower limit of a strong weathering zone is arranged below the platform, the backfill rock ballast is arranged on the slope and the platform, and the platform concrete is arranged on the backfill rock ballast. Platform concrete is arranged above the backfill rock ballast, and a concrete retaining wall is arranged on the lower portion of the outer side of the backfill rock ballast. The temporary road in the construction process can be utilized, extra excavation and support are not needed, the influence on the flow state of the water inlet and the water outlet is reduced, and construction, operation and maintenance are convenient.

Description

Technical Field

[0001] The utility model relates to the field of pumped storage power stations, in particular to a trash rack platform structure for the water inlet and outlet combined with a construction temporary road. Background Technique

[0002] The water inlet / outlet is an important part of the water conveyance system of a pumped storage power station. During the operation of the power station, the water inlet / outlet will be frequently started. To protect the normal operation of the power generation and pumping units, a trash rack is arranged at the front of this structure to prevent most of the floating objects in the water flow from entering the pump units. During the later operation, the trash rack needs to be inspected and cleaned.

[0003] For the convenience of hoisting and overhauling the trash rack of the water inlet / outlet in the later stage of a pumped storage power station, a trash rack overhaul platform is arranged between the water inlet and outlet, and the platform is located above the dead water level. Usually, it is necessary to excavate the slope from the elevation of the bottom slab of the water inlet / outlet after excavation below the initial terrain line upwards to the elevation of the overhaul platform, and then use reinforced concrete to slope the slope after excavation. In order to reduce the external water pressure on the water inlet / outlet, plastic drain pipes are usually embedded in the slope and system drainage holes are set, as Figure 1 shown.

[0004] During the actual operation period of the power station, the overhaul frequency of the trash rack of the water inlet / outlet is relatively low. Excavating the slope from the bottom slab of the water inlet / outlet to the trash rack overhaul platform increases a large amount of construction costs, and the subsequent slope treatment is relatively troublesome. The trash rack overhaul platform is built between the water inlet and outlet, and the construction of the platform slope may affect the water flow pattern of the water inlet / outlet during the subsequent operation, resulting in local head loss.

[0005] Based on the above situation, the utility model proposes a trash rack platform structure for the water inlet and outlet combined with a construction temporary road to effectively solve the above problems. Content of the Utility Model

[0006] In order to solve the problems in the background technique, the utility model provides a trash rack platform structure for the water inlet and outlet combined with a construction temporary road.

[0007] The utility model adopts the following technical scheme:

[0008] A trash rack platform structure for the water inlet and outlet combined with a construction temporary road includes a platform excavated under the road, backfilled stone slag, platform concrete and a concrete retaining wall. A slope reaching the lower limit of the strongly weathered zone is arranged below the platform. The backfilled stone slag is arranged on the slope and the platform. The platform concrete is arranged above the backfilled stone slag, and a concrete retaining wall is arranged at the lower part outside the backfilled stone slag.

[0009] Further, the platform concrete is provided with a trash rack overhaul road, and the backfilled stone slag is also arranged between the water inlet and outlet of the road until the elevation of the top of the trash rack overhaul road.

[0010] Furthermore, the width of the platform is greater than 2 m.

[0011] Furthermore, the concrete retaining wall is arranged perpendicular to the road surface.

[0012] Furthermore, the width of the concrete retaining wall is 10 m.

[0013] Furthermore, the slope is provided with a reinforced concrete slope supporting structure.

[0014] Furthermore, the depth of the platform from the road surface is 10 m.

[0015] The trash rack platform structure of the water inlet and outlet combined with the construction temporary road provided by the utility model can utilize the temporary road in the construction process, without additional excavation and support, reduce the influence on the flow pattern of the water inlet and outlet, and is more convenient for construction, operation and maintenance. Brief Description of the Drawings

[0016] Figure 1 is a schematic cross-sectional view of the traditional structure;

[0017] Figure 2 is a schematic cross-sectional structure view of the utility model;

[0018] Figure 3 is a schematic plan structure view of the utility model;

[0019] Figure 4 is a schematic view of the outer connection of the utility model.

[0020] The numbers marked in the figures are successively represented as: 1 - platform concrete, 2 - trash rack maintenance platform, 3 - backfilled crushed stone, 4 - concrete retaining wall, 5 - construction temporary road, 6 - water inlet and outlet bottom plate, 7 - trash rack maintenance road, 8 - water inlet and outlet, 9 - original ground line, 10 - intercepting ditch, 11 - platform. Detailed Description of the Preferred Embodiments

[0021] The utility model will be further described in detail below in conjunction with the drawings and specific embodiments.

[0022] Referring to the attached Figures 2-4 , a trash rack platform structure of the water inlet and outlet combined with the construction temporary road includes a platform 11 excavated under the road, backfilled crushed stone 3, platform concrete 1 and a concrete retaining wall 4. A slope reaching the lower limit of the strongly weathered zone is provided under the platform. The backfilled crushed stone 3 is arranged on the slope and the platform 11. The platform concrete 1 is arranged above the backfilled crushed stone 3. The lower part on the outside of the backfilled crushed stone 3 is provided with the concrete retaining wall 4. In the figure, 5 is the construction temporary road, 9 is the original ground line, 10 is the intercepting ditch, 6 is the water outlet bottom plate, and 8 is the water inlet and outlet.

[0023] The platform concrete 1 is provided with a trash rack maintenance road 7, which facilitates the layout and placement of maintenance equipment. The backfilled crushed stone 3 is also arranged between the inlet and outlet of the road until the top elevation of the trash rack maintenance road 7. Compacted crushed stone is backfilled at the bottom of the original temporary road slope to reduce the impact on the water flow pattern at the inlet / outlet.

[0024] The width of the platform 11 is greater than 2m.

[0025] The concrete retaining wall 4 is set perpendicular to the road surface. The width of the concrete retaining wall 4 is 10m. The retaining wall penetrates not less than 5m below the bedrock of the inlet / outlet platform to ensure tight combination with the slope of the compacted crushed stone without sliding.

[0026] The slope is provided with reinforced concrete slope protection.

[0027] The depth of the platform 11 from the road surface is 10m.

[0028] The construction steps of this structure are as follows:

[0029] As Figure 2 、 3 shown, the temporary access road during the construction process is used for later reconstruction. Based on the original temporary access road for the construction of the inlet / outlet, it is excavated downward with a slope ratio of 1:0.75. The slope is supported by reinforced concrete slope protection, and a platform 11 with a width of about 3.0m is reserved to facilitate the slope cleaning below to the lower limit of the strongly weathered zone. The bottom of the road is backfilled with crushed stone between the inlet and outlet to the top elevation of the trash rack maintenance road 7. A gravity-type reinforced concrete retaining wall 4 is built below the backfilled crushed stone 3 to reduce the impact on the flow capacity of the inlet / outlet and lower the local head loss. Later, the top of the trash rack maintenance platform 2 is paved with platform concrete 1, and the trash rack maintenance road 7 can be arranged in combination with the natural terrain in the reservoir, as Figure 4 shown.

[0030] The layout form of the trash rack platform combined with the temporary road design in the above structure is arranged by excavating and cleaning the slope and then backfilling with crushed stone below the road. Using the original construction access road effectively solves the problem of additionally excavating, supporting, and building the trash rack maintenance platform 2 between the inlet and outlet, and has high reliability and practicability.

[0031] Note that the above is only the preferred embodiment of the present utility model and the technical principles applied. Those skilled in the art will understand that the present utility model is not limited to the specific embodiments described herein, and various obvious changes, re-adjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present utility model. Therefore, although the present utility model has been described in more detail through the above embodiments, the present utility model is not limited to the above embodiments. Without departing from the concept of the present utility model, more other equivalent embodiments can be included, and the scope of the present utility model is determined by the scope of the appended claims.

Claims

1. A trash rack platform structure for an inlet and outlet combined with a temporary construction road, characterized in that: It includes a platform dug under the road, backfill slag, platform concrete and concrete retaining wall. A slope to the lower limit of the strong weathering zone is arranged under the platform. The backfill slag is arranged on the slope and the platform. Platform concrete is arranged above the backfill slag, and a concrete retaining wall is arranged at the lower part of the outer side of the backfill slag.

2. The trash rack platform structure for water inlet and outlet combined with temporary road construction according to claim 1, characterized in that: The platform concrete is provided with a trash rack inspection road, and backfill slag is also arranged between the water inlet and outlet of the road until the top elevation of the trash rack inspection road.

3. The trash rack platform structure for water inlet and outlet combined with temporary road construction according to claim 1, characterized in that: The platform width is greater than 2m.

4. The trash rack platform structure for water inlet and outlet combined with temporary road construction according to claim 1, characterized in that: Concrete retaining wall is set vertically on the road surface.

5. The trash rack platform structure for water inlet and outlet combined with temporary road construction according to claim 4, characterized in that: The width of the concrete retaining wall is 10m.

6. The trash rack platform structure for water inlet and outlet combined with temporary road construction according to claim 1, characterized in that: The slope is provided with reinforced concrete slope support.

7. The trash rack platform structure for water inlet and outlet combined with temporary road construction according to claim 1, characterized in that: The platform is 10m deep from the road surface.

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