Dam body structure for filling construction of concrete faced rockfill dam

Abstract

The filling construction dam body structure of the concrete faced rockfill dam comprises a rockfill area and a dam rear pressing slope body located on the back slope of the rockfill area, the rear pressing slope body covers the middle-lower area of the back slope of the rockfill area, and an inverted filter material layer is arranged between the dam rear pressing slope body and the rockfill area. After the upstream upstream face of the rockfill area leaks to the back slope of the dam body, water flow mixed with fine particles is blocked in the inverted filter material layer to prevent the dam body from being overhead and unstable, and the problem that after the dam body leaks to the back slope of the dam body from the upstream upstream face, a channel is formed, and the dam body is prone to being unstable is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of face plate rockfill dam filling construction dam body structure, belong to water conservancy dam body construction technical field. BACKGROUND

[0002] The reservoir body of pumped storage power station is constructed when rockfill dam, and the construction of rockfill compaction and piling needs to ensure the dam body from seepage.

[0003] The existing rockfill dam technology is disclosed in Chinese patent publication No.CN203795389U, which is to construct cover area and upstream cover area in turn on the upstream water-facing surface of the dam body to cover the concrete panel part of the root of the dam body for seepage prevention. However, when the dam body seeps from the upstream water-facing surface to the dam body back slope, a channel is formed, which is easy to cause the instability of the dam body. SUMMARY

[0004] To solve the above technical problems, the utility model provides a kind of face plate rockfill dam filling construction dam body structure.

[0005] The utility model is realized by the following technical solutions.

[0006] The utility model provides a kind of face plate rockfill dam filling construction dam body structure, comprising:

[0007] The rockfill area and the dam back pressure slope body in the back slope of the rockfill area are covered in the middle and lower area of the back slope of the rockfill area, and there is a filter layer between the dam back pressure slope body and the rockfill area.

[0008] The upstream water-facing surface of the rockfill area is sequentially constructed with transition area, cushion area and concrete panel area.

[0009] The bottom of the concrete panel area has a cushion layer composed of fine sand.

[0010] The bottom of the cushion layer has a curtain grouting layer in the rock stratum.

[0011] The root of the concrete panel area has fly ash area, fully weathered soil area and stone slag mixture area from inside to outside in turn, and the fly ash area is tightly attached to the bottom of the concrete panel area inside the fully weathered soil area.

[0012] The utility model has the advantages that when the upstream water-facing surface of the rockfill area seeps to the dam body back slope, the water flow with fine particles is blocked in the filter layer to avoid the instability of the dam body, and the problem of the instability of the dam body caused by the channel formed when the dam body seeps from the upstream water-facing surface to the dam body back slope is solved. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the structure distribution schematic diagram of the utility model;

[0014] In the figure: 1 - rockfill area; 2 - transition area; 3 - cushion area; 4 - concrete face slab area; 5 - cushion; 51 - curtain grouting layer; 6 - fly ash area; 7 - completely weathered soil area; 8 - stone mixture area; 11 - backfill pressure slope body; 12 - filter material layer. DETAILED DESCRIPTION

[0015] The technical scheme of the utility model is further described below, but the scope of protection is not limited to the description.

[0016] As Figure 1 shown.

[0017] The dam structure of the panel rockfill dam filling construction of the application comprises:

[0018] The rockfill area 1 is formed by rockfill piling and rolling, and the upstream water-facing surface of the rockfill area 1 is sequentially constructed with the transition area 2, the cushion area 3 and the concrete face slab area 4, and the bottom of the concrete face slab area 4 has a cushion 5 formed by fine sand.

[0019] The root of the concrete face slab area 4 sequentially has the fly ash area 6, the completely weathered soil area 7 and the stone mixture area 8 from inside to outside, and the fly ash area 6 is tightly arranged at the bottom of the concrete face slab area 4 inside the completely weathered soil area 7.

[0020] The rockfill area 1 has a backfill pressure slope body 11 on the back slope, the backfill pressure slope body 11 covers the middle and lower areas of the back slope of the rockfill area 1, and the backfill pressure slope body 11 and the rockfill area 1 have the filter material layer 12 therebetween.

[0021] After the reservoir is filled with water, the water body contacts the upstream water-facing surface of the rockfill area 1, and after the upstream water-facing surface of the rockfill area 1 seeps to the back slope of the dam body, the water flow mixed with fine particles is blocked in the filter material layer 12 to avoid the dam body being unstable due to being lifted, thereby solving the problem that the dam body is prone to instability due to the formation of a channel after the upstream water-facing surface of the dam body seeps to the back slope of the dam body.

Claims

1. A fill construction dam structure of a face rockfill dam, characterized by, It comprises: a rock-fill area (1) and a dam backfill (11) on the back slope of the rock-fill area (1), the dam backfill (11) covering the lower area of the back slope of the rock-fill area (1), and a filter layer (12) between the dam backfill (11) and the rock-fill area (1).

2. The FRC dam filling construction dam structure according to claim 1, characterized in that: The upstream face of the rock-fill area (1) is sequentially constructed with a transition area (2), a cushion area (3) and a concrete face slab area (4).

3. The embankment construction dam structure of claim 2, wherein: The bottom of the concrete face slab area (4) is provided with a cushion (5) of fine sand.

4. The embankment construction dam structure of claim 3, wherein: The bottom of the cushion (5) is provided with a curtain grouting layer (51) in the rock stratum.

5. The FRC dam filling construction dam structure according to claim 3, wherein: The root of the concrete face slab area (4) is sequentially provided with, from inside to outside, a fly ash area (6), a completely weathered soil area (7) and a stone slag mixture area (8), and the fly ash area (6) is located inside the completely weathered soil area (7) and closely adheres to the bottom of the concrete face slab area (4).

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