CN211816069U - Concrete face rockfill dam with geotextile layer between bedding material and transition material - Google Patents

Abstract

The utility model relates to a add concrete panel rock-fill dam of geotechnological fabric layer between bed course material and the transition material, the rock-fill dam includes: dam foundation, the dam body of setting on dam foundation, its characterized in that, the dam body includes upper reaches shop's lid district, the heavy district of lid, concrete toe board and concrete panel, bedding and padding layer district, geotextile reverse filter protective layer, transition material layer district, main rockfill district, inferior rockfill district, low reaches revetment layer, downstream slope toe drainage arris district, the domatic slope protection rubble district in low reaches, bedrock seepage prevention curtain under the toe board, the dam crown wave wall, the peripheral joint of toe board and concrete panel seam, the strip vertical joint between the concrete panel, be provided with copper stagnant water and rubber tape stagnant water between the seam, the top layer of seam sets up two seepage prevention stagnant water of plastic filler, the infiltration of rockfill dam is stable safe, has extensive practical value.

Description

Concrete face rockfill dam with geotextile layer between bedding material and transition material

Technical Field

The utility model relates to a concrete panel rock-fill dam, more specifically say, relate to a concrete panel rock-fill dam who adds the geotextile layer between bedding material and the transition material.

Background

Since the modern technology for constructing concrete faced rockfill dams (hereinafter referred to as face dams) was started in 1985, the development process of China has gone through nearly 34 years. In the built 220-multiple-deck dams with the height of more than 30m, 74 dams with the height of 100m and 16 dams with the height of 150m are built successively, and a batch of 200 m-level dams with the height of one level (178m), flood home ferry (179.5m), three-plate stream (185.5m), monkey rock (223.5m), water cloth (233m) and the like are built successively, so that the modern technical experiences of scientific research, design, construction, operation management, monitoring and the like are accumulated, although the starting is late, the starting point is high, the development speed is high, and a solid foundation is laid for advancing to a higher and wider direction.

In order to protect the ecological environment, reduce the pollution of primary energy to the atmospheric environment, fully utilize regenerated and clean energy, and vigorously develop the hydropower industry, the hydropower dam is a main hydraulic building which needs to be built. The concrete face rockfill dam makes full use of local materials, is economical and quick, and is particularly suitable for remote mountainous areas, especially western areas of China.

The invention patent application number 201510817066.4 discloses a construction method of a foundation concrete panel rock-fill dam, which is characterized in that: the method comprises the following steps: a. pouring a base: removing a dam foundation covering layer, excavating the dam foundation to a depth meeting the requirement of bearing capacity, arranging reinforcing steel bars in an excavation region, presetting an anti-seepage curtain 12 below a base anti-seepage region 8, reserving a base grouting gallery 11, quickly pouring base concrete, and simultaneously adopting a temperature control measure to prevent cracks; the size of the bin surface is determined according to the material characteristics when the base bearing area 7 is poured, and temperature control measures are taken during pouring; b. and (3) base seepage control treatment: the interface of the base seepage-proofing area 8 and the base bearing area 7 is subjected to seepage-proofing treatment, a base seepage-proofing area transverse seam 10 is arranged on the base seepage-proofing area 8, and the position of the base seepage-proofing area transverse seam 10 corresponds to the position of the panel vertical seam 14; c. the base is connected the face and is handled: filling transition materials on the top of the base 1 to form a transition area b6, wherein the filling materials and various indexes of the transition area b6 are the same as those of the transition area a 5; d. filling the concrete faced rockfill dam: and sequentially filling the concrete faced rockfill dam 2, the transition area a5, the cushion area 4 and the face plate 3, and arranging the face plate vertical seams 14 on the face plate 3, wherein the face plate vertical seams correspond to the transverse seams 10 of the base anti-seepage area one by one, so that the construction is completed. The construction method still cannot completely solve the water seepage problem of the concrete panel rock-fill dam.

Disclosure of Invention

The utility model provides a add concrete panel rock-fill dam of geotechnological fabric layer between bed course material and the transition material, include: the dam comprises a dam foundation and a dam body arranged on the dam foundation, wherein the dam body comprises an upstream paving area, a cover weight area, a bedding material area, a special bedding material, a transition material area, a main rockfill area, a secondary rockfill area, a downstream slope protection layer, a riverbed and two banks, reinforced concrete toe boards on a rock foundation are formed by excavating, water stop structures are arranged between the toe boards and a concrete panel, a thin geotextile is additionally arranged between the downstream bedding material area and the transition material area of the concrete panel and used for protecting bedding material particles, particularly fine particles, from being lost under the condition of osmotic water pressure of a reservoir so as to prevent the occurrence of panel cracks and collapse, and the aim is to ensure the stability and the safety of the concrete panel rockfill dam in the operation period; the foundation rock under the concrete toe board is equipped with impervious grouting curtain, the peripheral seams of toe board and concrete face board, vertical seams between face boards and the seams between face board and dam top of wave-proof wall are equipped with copper water-stopping and rubber belt water-stopping structures, and the surface of the seams is equipped with two channels of impervious water-stopping of plastic filler. The dam body is arranged on bedrock or a dam foundation, an upstream side main rockfill area and a downstream side secondary rockfill area are arranged on the dam foundation, the main rockfill area is sequentially provided with a transition material area, a geotextile reverse filtering protection layer, a bedding material area and a concrete panel layer from inside to outside, the lower part of the concrete panel layer covers the fine material bedding layer area, and the cover weight and the upstream paving area cover the lower part of the concrete panel layer from inside to outside; further, the slope ratio of the slope surface of the dam is 1:1.3-1: 1.5.

Further, the concrete face plate layer is supported on the dam body bedding material.

Further, the bedding material area is supported on the transition material area.

Further, the low reaches are main rockfill district, inferior rockfill district, bank protection district.

Furthermore, the drainage body is arranged at the lower part of the downstream slope protection layer.

Furthermore, a copper water stopping layer and a rubber water stopping layer are arranged between the peripheral seam and the panel parting seam, which are connected with the concrete panel layer and the toe board.

Furthermore, the seepage-proof curtain below the concrete toe board penetrates into the bedrock to seal the bedrock crack seepage channel, and the appearance of the seepage-proof curtain is in a continuous curtain wall shape.

Add the concrete panel rock-fill dam of geotechnological fabric layer between bed course material and the transition material:

the lower edge of the arranged concrete panel layer is matched with the fine material cushion layer area and the bottom plate of the dam top wave wall.

The arranged dam foundation is used for supporting the whole dam body.

The anti-seepage concrete is arranged in an upstream paving area at the upstream of the dam body, when a concrete panel cracks, anti-seepage concrete is brought into the crack along with water flow, the crack is clogged through the reverse filtration of a padding layer area below the concrete panel to recover the anti-seepage function, and a heavy covering area is constructed on the upstream paving area to prevent the anti-seepage concrete of the upstream paving area from being unstable.

The arranged special cushion area plays a role in secondary reverse filtration and seepage prevention on the upstream paving area and the water seepage borne by the concrete panel.

The arranged transition material area can block the material in the bedding material area from being washed to the main rockfill area.

The bedding material district's that sets up mainly used is the supporter of concrete panel layer, transmits the water pressure that concrete panel layer bore for main rockfill body to play the control action of twice seepage flow.

Set up the geotextile between bedding material district and transition material district for effectual protection bedding material granule is unlikely to run off under reservoir seepage water pressure condition especially fine particle, and then causes bedding material district to form piping and collapse, leads to concrete panel crack and the phenomenon of collapsing to take place, and the purpose is the seepage flow stability security of guaranteeing concrete panel rock-fill dam.

The main rockfill area is arranged to maintain the overall stability and safety of the supporting dam body.

The secondary rockfill area plays a role in protecting the main rockfill area and the downstream slope protection layer.

The seepage-proofing curtain can block the water seepage of the foundation.

Add the beneficial effect of concrete panel rock-fill dam of geotechnological fabric layer between bed course material and the transition material:

1, add the concrete panel rock-fill dam on geotextile layer between bed course material and the transition material, through setting up the geotextile in bed course material district low reaches to the existing reverse filtration guard action in bed course material district, prevent that bed course material fine particle from excessively losing under the osmotic water pressure condition and piping and the fluid soil that cause destroy, be favorable to improving the stability on special bed course district to improve the security of concrete panel and dam body.

2, add the concrete face rockfill dam of geotechnological fabric layer between bedding material and the transition material, from the stability of effective protection bedding material in essence, reservoir area water pressure passes through the concrete face and transmits on the main rockfill district. The concrete panel is firmly combined with the main rockfill area, and the stability and the safety of the dam body in the operation period are obviously enhanced.

3, the concrete panel rock-fill dam of addding the geotextile layer between bedding material and the transition material, the initiative is at home and abroad with the geotextile layer setting between bedding material layer and transition bed of material promptly the dam internal, through with the utility model discloses a structure cooperatees is passed through to other prevention of seepage, can further successfully effectively prevent the bedding material layer especially fine particle material to be taken gradually to downstream transition bed of material layer district and main rock-fill district by the infiltration water, causes the bedding material layer to sink, and then causes the dangerous image emergence of concrete panel crack and collapse to thoroughly solved the technological problem of home and abroad about concrete panel rock-fill dam infiltration stability safety.

4, add the concrete face rockfill dam of geotechnological fabric layer between bedding material and the transition material, the work progress of being convenient for alternates and goes on, is particularly useful for the prevention of seepage of the super high large-scale concrete rockfill dam more than 100m ~ 300 meters level, realizes the stability and the security of dam infiltration essence.

Drawings

Fig. 1 is a schematic structural view of a concrete-faced rock-fill dam with a geotextile layer between a bedding material and a transition material according to the present invention;

fig. 2 is an enlarged view of a portion of the structure in the direction a of fig. 1.

The reference numbers in the figures are as follows:

1-an upstream cover laying area; 2-a cover weight area; 3-a cushion area; 4-special bedding area; 5-a transition zone; 6-main rockfill area; 7-downstream rockfill zone; 8-downstream slope protection; 9-the interface between the main rockfill area and the downstream rockfill area is variable, and the angle is determined according to the dam material characteristics and the dam height; 10-drainage ridge area; 11-concrete panels; 12-geotextile.

Detailed Description

The concrete faced rockfill dam embodiment of the present invention with geotextile layer added between the bedding material and the transition material will be described in detail with reference to the attached drawings 1 to 2 of the specification.

As shown in fig. 1 and 2, the concrete face rockfill dam with the geotextile layer added between the bedding material and the transition material comprises: 1-an upstream cover laying area; 2-a cover weight area; 3-a cushion area; 4-fine material bedding area; 5-a transition zone; 6-main rockfill area; 7-downstream secondary rockfill zone; 8-downstream slope protection; 9-the interface between the main rockfill area and the downstream rockfill area is variable, and the angle is determined according to the dam material characteristics and the dam height; 10-drainage ridge area; 11-concrete panels; 12-geotextile (geotextile).

Wherein: the dam body is arranged on a dam foundation, a main rockfill area 6 is arranged on the dam body, a transition material layer area 5, a geotextile reverse filter protection layer 12, a padding layer area 3 and a concrete face slab layer 11 are sequentially arranged on the main rockfill area 6 in the upstream direction, the lower portion of the concrete face slab layer 11 is supported on the cushion layer area 3, an upstream cover area 1 and a cover weight area 2 cover the outer side of the lower portion of the concrete face slab layer 11, a secondary rockfill area 7 is arranged on the downstream of the main rockfill area 6, a drainage ridge 10 is constructed at the bottoms of the inner sides of the secondary rockfill area 7 and a downstream slope protection layer 8, a wave wall is constructed at the top of the dam body, and the slope ratio of the slope of the dam body is 1:1.3-1: 1..

The above description of the embodiments of the present invention is provided by referring to the drawings of the specification, but not to limit the scope of the present invention, and on the basis of the technical solution of the present invention, various modifications or variations that can be made by those skilled in the art without inventive work are still within the scope of the present invention.

Claims (1)

1. A concrete faced rockfill dam with a geotextile layer added between a bedding material and a transition material comprises: the dam comprises a dam foundation and a dam body arranged on the dam foundation, and is characterized in that the dam body comprises an upstream paving area, a cover weight area, a concrete toe board, a concrete panel, a padding layer area, a geotextile reverse filter protection layer, a transition material layer area, a main rockfill area, a secondary rockfill area, a downstream slope protection layer, a downstream slope toe drainage ridge, a downstream slope protection blockstone area, a bedrock seepage-proofing curtain below a concrete toe board, a dam top wave-proofing wall, peripheral seams of the concrete toe board and the concrete panel, strip vertical seams between the concrete panels, copper water stops and rubber strip water stops arranged between the seams, and a plastic filler two seepage-proofing water stops arranged on the surface layers of the seams; the dam body is arranged on a dam foundation, a main rockfill area is arranged on the dam body, a transition material bed area, a geotextile reverse filter protection layer, a padding layer area and a concrete face plate layer are sequentially arranged on the main rockfill area from inside to outside, and the lower part of the concrete face plate layer covers the fine material padding layer area; the upper-stream paving area and the weight covering area cover the lower part of the concrete panel layer from inside to outside; a dam foundation drainage layer with a thickness of 4-6 m of a transition material layer is horizontally arranged at the bottom of the main rockfill area; a rock block slope protection area is arranged on the downstream slope protection layer of the secondary rockfill area, and a downstream footing drainage ridge area of the dam is constructed at the bottom of the secondary rockfill area and the downstream slope protection layer; and filling and pouring an impermeable asphalt concrete pavement layer on the dam top wave wall and the top dam material.

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