Asphalt concrete panel heat preservation structure

Abstract

The utility model belongs to the technical field of asphalt concrete face rock-fill dams, and discloses an asphalt concrete face heat preservation structure which is arranged between the dam top and the reservoir bottom of a dam and comprises an asphalt concrete face and a heat preservation layer which are sequentially laid on dam filling materials, and the heat preservation layer comprises a light frame and a plurality of heat preservation units. The light frame is provided with a plurality of containing cavities, the heat preservation units are clamped in the containing cavities, and fixing structures are arranged at the end, located at the dam crest and the end, located at the reservoir bottom, of the heat preservation layer. Heat preservation of the asphalt concrete panel is achieved by laying the light frame and the heat preservation unit on the asphalt concrete panel, construction is convenient and fast, the construction period is short, and the standardization degree is high; the stability of the overall structure of the heat preservation layer can be improved, meanwhile, the circumferential direction of the heat preservation unit can be fixed, and deformation of the heat preservation unit is effectively prevented; and the thermal insulation layer can be replaced conveniently when being damaged.

Description

Technical Field

[0001] The utility model belongs to the technical field of asphalt concrete face rockfill dams, and specifically relates to a thermal insulation structure for asphalt concrete face slabs. Background Art

[0002] For asphalt concrete face rockfill dams located in the northwest region, due to the hot summers, cold winters, large day-night temperature differences, and rapid changes between cold and heat, the asphalt concrete face slabs are extremely prone to high-temperature flow and low-temperature freeze cracking, etc., thus affecting their structural safety and service life. It is necessary to apply a permanent thermal insulation layer on their surfaces to protect the asphalt concrete structure from the influence of temperature changes.

[0003] The existing technology mainly adds polymer to asphalt or asphalt mixture to improve the low-temperature anti-cracking and high-temperature flow resistance of asphalt concrete face slabs. However, affected by raw materials, construction equipment, and construction technology, etc., the construction quality is difficult to control, and the actual effect is not obvious. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a thermal insulation structure for asphalt concrete face slabs, to solve or alleviate the adverse effects caused by high temperature, low temperature, and temperature changes on asphalt concrete face slabs, and to achieve standardized construction.

[0005] The technical solution adopted by the utility model is a thermal insulation structure for asphalt concrete face slabs, which is arranged between the dam crest and the reservoir bottom of the dam, and includes an asphalt concrete face slab and a thermal insulation layer laid successively on the dam filling material. The thermal insulation layer includes a light frame and a number of thermal insulation units. The light frame has a number of accommodation cavities, and the thermal insulation units are clamped in the accommodation cavities. Fixed structures are provided at both the end of the thermal insulation layer located at the dam crest and the end located at the reservoir bottom.

[0006] Preferably, the light frame includes a number of H-shaped steel channels vertically and fixedly connected horizontally and vertically. The H-shaped steel channel includes a web and two mutually parallel flange plates, and the web is vertically arranged between the two flange plates.

[0007] Preferably, the H-shaped steel channels are connected by welding.

[0008] Preferably, the fixed structure at one end of the thermal insulation layer located at the reservoir bottom is a concrete block or a sandbag.

[0009] Preferably, a wave wall is provided on the upstream side of the dam crest. An anchoring structure is provided at one end of the thermal insulation layer located at the dam crest. The anchoring structure includes a grab bar and a steel plate. The grab bar and the steel plate are welded and then embedded inside the wave wall. The H-shaped steel channel is fixedly connected to the steel plate by welding.

[0010] Preferably, the thermal insulation unit is a polystyrene board.

[0011] The beneficial effects of the present utility model are as follows:

[0012] The thermal insulation structure of the asphalt concrete panel of the present utility model realizes the thermal insulation of the asphalt concrete panel by laying a light frame and thermal insulation units on the asphalt concrete panel, preventing the asphalt concrete from being damaged by low-temperature freezing and high-temperature flowing. The thermal insulation structure is convenient for construction, has a short construction period, and a high degree of standardization;

[0013] The light frame is composed of H-shaped steel channels, which improves the strength and stability of the overall structure of the thermal insulation layer, and at the same time can fix the circumference of the thermal insulation unit, effectively preventing the deformation of the thermal insulation unit;

[0014] The thermal insulation layer is designed in a unit modular form. When a part of the thermal insulation layer is damaged, only the damaged part of the thermal insulation unit needs to be replaced, which is convenient for replacement. Description of the Drawings

[0015] Figure 1 It is a schematic structural diagram of the thermal insulation structure of the asphalt concrete panel of the present utility model;

[0016] Figure 2 It is a schematic structural diagram of the thermal insulation layer of the present utility model;

[0017] Figure 3 It is a schematic connection structure diagram of the H-shaped steel channel and the thermal insulation unit of the present utility model.

[0018] In the figure: 1. Dam filling material; 2. Asphalt concrete panel; 3. Thermal insulation layer; 31. H-shaped steel channel; 311. Flange; 312. Web; 32. Thermal insulation unit; 4. Wave wall; 5. Grasping bar; 6. Steel plate; 7. Fixed block. Detailed Description of the Preferred Embodiment

[0019] The present utility model will be described in detail below with reference to the drawings and specific embodiments.

[0020] As Figure 1 and Figure 2 shown, the thermal insulation structure of the asphalt concrete panel of the present utility model is arranged between the crest of the dam and the bottom of the reservoir, and includes an asphalt concrete panel 2 and a thermal insulation layer 3 laid in sequence on the dam filling material 1. The thermal insulation layer includes a light frame and a plurality of thermal insulation units 32. The light frame has a plurality of accommodation cavities, and the thermal insulation units 32 are clamped in the accommodation cavities.

[0021] The dam filling material 1 is the material laid on the dam foundation surface, including rockfill, transition material, and gravel cushion layer, which is used to provide a stable foundation. The asphalt concrete panel 2 is an important anti-seepage structure in hydraulic structures, which is used on the upstream surface of the earth-rock dam to prevent water body leakage.

[0022] The light frame includes several H-shaped steel channels 31 laid horizontally and vertically. As Figure 3 shown, the H-shaped steel channel 31 includes flange plates 311 and a web 312. The two flange plates 311 are parallel to each other, and the web 312 is vertically arranged between the two flange plates 311. Four H-shaped steel channels enclose a square accommodation cavity. The horizontally laid H-shaped steel channels 31 and the vertically laid H-shaped steel channels 31 are welded together, and the welding points are at the flange plates 311. The heat preservation unit 32 is clamped in the groove formed by the flange plate 311 and the web 312.

[0023] The heat preservation unit 32 is a square polystyrene board or other heat preservation materials.

[0024] One end of the heat preservation layer 3 at the bottom of the reservoir is provided with a fixing block 7. The fixing block 7 is a concrete block or a sandbag. The concrete block or the sandbag is arranged above the heat preservation layer 3 for pressing and fixing.

[0025] One end of the heat preservation layer 3 at the top of the dam is provided with an anchoring structure. The anchoring structure includes a grab bar 5 and a steel plate 6. The grab bar 5 and the steel plate 6 are welded and then embedded inside the wave break wall 4. The H-shaped steel channel 31 is connected and fixed to the wave break wall 4 by welding with the steel plate 6.

[0026] The wave break wall 4 is an important facility in water conservancy projects for preventing wave impact and erosion. It is usually built at the front position of the top of the reservoir, river channel, and dam to block water. In this embodiment, it is arranged on the upstream side of the dam top.

[0027] In this embodiment, the light frame is the H-shaped steel channel 31, and the accommodation cavity is square. It can also be other steel profiles, and the accommodation cavity can be rectangular, triangular, etc., which can be adjusted and deformed according to actual situations.

[0028] The implementation method of the present utility model is as follows:

[0029] After the dam foundation excavation, dam body filling, and laying of the asphalt concrete panel 2 are completed, the construction of the heat preservation layer 3 is carried out from the bottom of the reservoir to the top of the dam. First, a longer H-shaped steel channel 31 is laid horizontally, and the flange plate 311 is attached to the asphalt concrete panel 2. The lower end of the heat preservation unit 32 is clamped into the groove formed by the flange plate 311 and the web 312. Then, a H-shaped steel channel 31 is longitudinally laid in the vertical direction of the heat preservation unit 32, and the side end of the heat preservation unit 32 is closely attached to the groove of the longitudinally laid H-shaped steel channel 31. After that, the longitudinally laid H-shaped steel channel 31 is welded to the horizontally laid H-shaped steel channel 31. After laying one layer like this, another longer H-shaped steel channel 31 is horizontally clamped at the upper end of the heat preservation unit 32 and welded to the longitudinally laid H-shaped steel channel 31, and so on until the laying of the entire heat preservation layer 3 is completed.

[0030] After laying one layer, one end of the insulation layer 3 at the bottom of the reservoir is fixed tightly with concrete blocks or sandbags; after laying the entire insulation layer 3, one end of the insulation layer 3 at the top of the dam is anchored on the wave wall 4. Specifically, first, the grab bars 5 and the steel plate 6 are welded and then embedded inside the wave wall 4, and then the H-shaped steel channel 31 is connected and fixed to the steel plate 6 by welding, thus realizing the fixed connection between the H-shaped steel channel 31 and the wave wall 4 and realizing the overall fixation of the insulation layer 3.

[0031] The components and structures not described in detail in the embodiments are well-known components and common structures or common means in this industry, and will not be described one by one here.

Claims

1. An asphalt concrete panel thermal insulation structure is arranged between the dam crest and the reservoir bottom of the dam, and is characterized in that, It includes an asphalt concrete panel (2) and a thermal insulation layer (3) laid successively on the dam filling material (1). The thermal insulation layer (3) includes a light frame and a number of thermal insulation units (32). The light frame has a number of accommodation cavities, and the thermal insulation units (32) are clamped in the accommodation cavities. Fixed structures are provided at both the end of the thermal insulation layer (3) located at the dam crest and the end located at the reservoir bottom.

2. The asphalt concrete panel thermal insulation structure according to claim 1, characterized in that, The light frame includes a number of H-shaped steel channels (31) fixedly connected vertically and horizontally. The H-shaped steel channel (31) includes a web (312) and two mutually parallel flange plates (311). The web (312) is vertically arranged between the two flange plates (311).

3. The asphalt concrete panel thermal insulation structure according to claim 2, characterized in that, The H-shaped steel channels (31) are connected by welding.

4. The thermal insulation structure of the asphalt concrete panel according to claim 1, wherein, The fixed structure at one end of the thermal insulation layer (3) located at the reservoir bottom is a concrete block or a sandbag.

5. The asphalt concrete panel thermal insulation structure according to claim 2, characterized in that, A wave wall (4) is provided on the upstream side of the dam crest. An anchoring structure is provided at one end of the thermal insulation layer (3) located at the dam crest. The anchoring structure includes a grab bar (5) and a steel plate (6). The grab bar (5) and the steel plate (6) are welded and then embedded inside the wave wall (4). The H-shaped steel channel (31) is fixedly connected to the steel plate (6) by welding.

6. The asphalt concrete panel thermal insulation structure according to claim 1, characterized in that The thermal insulation unit (32) is a polystyrene board.

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