Slope anchor platform structure for mountain-valley type dry combustion ash storage facility

Abstract

To provide a slope anchor platform structure for a mountain-valley type dry combustion ash storage site, which can stably fix an artificial seepage prevention lining layer to a steep slope and increase the storage capacity of the combustion ash storage site as much as possible. [Solution] The slope anchor platform structure of a mountain-valley type dry combustion ash storage site has at least one stage of anchor platform 2 installed on a soil slope 1, with anchor grooves 3 installed in each stage of anchor platform, each of which has a concave groove shape, and an artificial seepage prevention lining layer laid on the soil slope, which extends deep into the anchor grooves along the slope of the soil slope and the surface of the anchor platform, with pull-out prevention anchor rods 6 installed in the anchor grooves, and plain concrete 5 poured into the anchor grooves.

Description

[Technical Field]

[0001] This invention relates to a slope anchor platform structure for mountain-valley type dry combustion ash storage site. [Background technology]

[0002] As an important storage area for combustion residues, gypsum, and pyrite in thermal power plants, combustion ash storage sites are considered a major pollution source. With the increasing requirements for environmental protection and cleanup, the standards for seepage prevention management of combustion ash storage sites have gradually improved. In recent years, the construction of new wet combustion ash storage sites has been prohibited, and all new combustion ash storage sites have adopted dry combustion ash storage sites. At the same time, based on the latest requirements of GB 18599-2020, "Standards for the Control of Pollution Caused by Storage and Landfill of General Industrial Solid Waste," the seepage prevention standards have been significantly improved, which has reduced the overall construction costs of combustion ash storage sites by approximately 20% to 50%.

[0003] As land resources become increasingly scarce, industrial project site requirements become increasingly stringent. Ash storage sites occupy large areas, making site selection more challenging. On the one hand, they cannot occupy red-line land such as basic agricultural land, and on the other hand, they must not be located too far from power plants to avoid excessive transportation costs. Currently, as the supply of fly ash becomes excessive, the excess fly ash is temporarily unused and can only be stored in new ash storage sites. While ash storage sites in some narrow valleys are the first choice, they are relatively difficult to build. Therefore, designers must focus on how to store as much combustion residue as possible within the limited available ash storage sites. Summary of the Invention [Problem to be solved by the invention]

[0004] The technical problem that this invention aims to solve is as follows: It is mainly for situations where the soil slope is relatively steep, and by pouring plain concrete into the anchor groove and installing pull-out prevention anchor rods, the artificial seepage prevention lining layer can be stably fixed on the steep slope. The purpose of this invention is to provide a slope anchor platform structure for a mountain-valley type dry combustion ash storage facility, which can maximize the storage capacity of the combustion ash storage facility within the limited range of available combustion ash storage facilities when there is no need to cut a large area on the steep slope. [Means for solving the problem]

[0005] The technical solution of this invention is specifically as follows:

[0006] A slope anchor platform structure for a valley-type dry combustion ash storage site, comprising: at least one stage of anchor platforms installed on a soil slope; anchor grooves installed in each stage of anchor platforms, the anchor grooves being concave; an artificial seepage prevention lining layer installed on the soil slope, the artificial seepage prevention lining layer extending deep into the anchor grooves along the slope of the soil slope and the surface of the anchor platforms; anti-pullout anchor rods installed in the anchor grooves; and plain concrete poured into the anchor grooves.

[0007] Preferably, the artificial seepage prevention lining layer is made of HDPE membrane, and the thickness of the HDPE membrane is 1.5 mm or more.

[0008] Preferably, the angle between the anti-pullout anchor rod and the anchor platform is 45°.

[0009] Preferably, the rod body of the anti-pullout anchor rod adopts hot-rolled ribbed steel bar.

[0010] Preferably, the difference in elevation between adjacent anchor platforms of each stage is 10 m or less.

[0011] Preferably, the cross section of the anchor groove is rectangular, and the cross section size is width x height = 400 mm x 600 mm, the distance from the anchor groove to the lower slope is 600 mm or more, and the distance from the anchor groove to the upper slope is 600 mm or more. [Effects of the Invention]

[0012] The beneficial effects of this invention are as follows: for relatively steep soil slopes, an anchor platform can be installed in the center of the slope, and rectangular anchor grooves can be installed in the anchor platform. The artificial seepage prevention lining of the combustion ash storage site can be inserted deep into the anchor groove along the slope and the surface of the anchor platform, and plain concrete can be poured in and anti-pullout anchor rods can be installed to stably fix the artificial seepage prevention lining to the steep slope. Within the limited range of available combustion ash storage sites, when there is no need to cut a large area of ​​land on the steep slope, this invention can maximize the storage capacity of the combustion ash storage site and is advantageous for extending the storage life of the combustion ash storage site. At the same time, it has the advantages of simple construction, relatively low construction costs, practicality and reliability, and is of relatively good value for popular use. [Brief explanation of the drawings]

[0013] [Figure 1] This is a schematic diagram of the overall structure of the slope anchor platform structure of a mountain-valley type dry combustion ash storage site, which is one embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0014] The following clearly and completely describes the technical solutions in the embodiments of the present invention, in conjunction with the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments, and all other embodiments obtained by those skilled in the art based on the embodiments of the present invention without any creative efforts are all within the scope of protection of this application.

[0015] In describing the present application, it should be understood that the orientations or positional relationships indicated by the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," etc. are orientations or positional relationships shown based on the drawings, and are merely for the convenience and simplification of the description of the present application, and do not indicate or imply that the referred-to devices or elements must have a particular orientation or be configured and operated in a particular orientation, and therefore should not be understood as limitations on the present application.

[0016] As shown in Figure 1, the slope anchor platform structure of a mountain-valley type dry combustion ash storage site includes at least one stage of anchor platform 2 installed on an earthen slope 1. For example, the anchor platform 2 may be two, three, four, five, six, etc. stages, and those skilled in the art can configure it according to actual needs. The present invention is not specifically limited, but includes that each stage of anchor platform 2 is provided with an anchor groove 3, and the anchor groove 3 has a concave groove shape. An artificial seepage prevention lining layer 4 is laid on the soil slope 1, and the artificial seepage prevention lining layer 4 is inserted deep into the anchor groove 3 along the slope of the soil slope 1 and the surface of the anchor platform 2. A pull-out prevention anchor rod 6 is installed in the anchor groove 3, and plain concrete 5 (plain concrete refers to a structure made of concrete without reinforcement or main reinforcement) is poured into the anchor groove 3. By pouring the plain concrete 5 and installing the pull-out prevention anchor rod 6, the artificial seepage prevention lining layer 4, the anchor groove 3, and the soil slope 1 are formed as a single unit, and the slope can be stably fixed to the steep slope.

[0017] Furthermore, in order to ensure the anti-seepage performance requirements, the anti-seepage of the combustion ash storage site needs to adopt an artificial anti-seepage lining layer 4, which adopts an HDPE membrane (i.e., a high-density polyethylene film, also known as an HDPE geomembrane or anti-seepage membrane, and its English name is High Density Polyethylene Impermeable membrane). The thickness of the HDPE membrane is 1.5 mm or more, for example, 1.5 mm, 2.0 mm, 2.5 mm, 3.0 mm, 3.5 mm, 4.0 mm, ..., 10.0 mm. Those skilled in the art can select according to actual needs. The present invention is not specifically limited. At the same time, the HDPE membrane needs to be deeply embedded in the anchor groove along the slope face of the soil slope 1 and the surface of the anchor platform.

[0018] Furthermore, to ensure the robustness and stability of the seepage prevention structure for the soil slope 1, anti-pullout anchor rods 6 must be installed in the anchor grooves 3. The angle between the anti-pullout anchor rods 6 and the anchor platform 2 is 45°. The rod bodies of the anti-pullout anchor rods 6 are made of hot-rolled ribbed steel bars (also known as deformed steel bars), with their diameter and depth calculated according to the geological conditions. Anti-pullout anchor rods 6 must be protected from corrosion, and after construction is complete, C20 plain concrete is poured. This C20 plain concrete refers to a concrete structure with a compressive strength standard of 20 MPa and no main reinforcement.

[0019] Furthermore, the height difference between the anchor platforms 2 of each adjacent stage is not more than 10 m, and may be, for example, 4.0 mm, 4.5 mm, 5.0 mm, 5.5 mm, 6.0 mm, 6.5 m, ..., 10.0 m. Those skilled in the art can set it according to actual needs, and the present invention does not specifically limit it.

[0020] Furthermore, current specifications require the cross-sectional size of the slope anchor groove to be at least 800mm x 800mm (width x height), the distance from the anchor groove to the lower slope to be at least 800mm, and the distance from the anchor groove to the upper slope to be at least 1000mm, resulting in a minimum total width of the anchor platform of 800 + 800 + 1000 = 2600mm. This invention overcomes the traditional technical prejudice by adopting a rectangular cross-section for the anchor groove 3, with a cross-sectional size of 400mm x 600mm (width x height). The distance from the anchor groove 3 to the lower slope to be at least 600mm, and the distance from the anchor groove 3 to the upper slope to be at least 600mm, resulting in a minimum total width of the anchor platform of 600 + 400 + 600 = 1600mm. In comparison, the minimum width of the anchor platform of the present invention is reduced by 1 m (i.e., 2600 mm - 1600 mm = 1000 mm) compared to the minimum width of the anchor platform required by the conventional specifications, and this width (i.e., 1600 mm) can meet the on-site construction requirements and reduce the amount of construction work required for the anchor platform.

[0021] The construction principle of this invention is as follows:

[0022] While linking the geological survey data, surface cleaning was carried out on the soil slope 1, and the original slope 7 was as shown in Figure 1. After cleaning, the soil slope 1 became almost flat, and attention was paid to the stability of the slope during the surface cleaning.

[0023] Based on the gradient and height of the soil slope 1, the number of anchor platforms 2 and the elevation of the anchor platforms 2 are determined.

[0024] The anchor platform 2 is excavated with a width of 1.6 m, and at the same time the anchor trench 3 is excavated.

[0025] The pull-out prevention anchor rods 6 are installed, and the pull-out prevention anchor rods 6 are drilled at a 45° inclination, taking care to ensure that the ends of the reinforcing bars are secured in advance for connecting the artificial seepage prevention lining layer 4.

[0026] An artificial seepage prevention lining layer 4 is laid, which uses HDPE membrane and takes care to reduce damage to the membrane body in the anchor groove 3, ensuring the sealing performance of the membrane. At the same time, holes are drilled in the geomembrane at the installation points of the pull-out prevention anchor rods, ensuring that the hole size matches the size of the rebar.

[0027] The geomembrane of the anti-pullout anchor rod 6 is sealed.

[0028] C20 plain concrete was poured into the anchor groove 3, and the final finished product was as shown in Figure 1.

[0029] The next step is to construct the anchor platform.

[0030] This invention, designed for steep soil slopes, involves installing an anchor platform 2 in the center of the slope, installing rectangular anchor grooves 3 in the anchor platform 2, and then driving the artificial seepage prevention lining of the combustion ash storage site deep into the anchor grooves 3 along the slope and the surface of the anchor platform. Plain concrete is then poured in, and pull-out prevention anchor rods are installed to stably secure the artificial seepage prevention lining 4 to the steep slope. Within the limited range of available combustion ash storage sites, this invention can maximize the storage capacity of combustion ash storage sites when large-scale excavation is not required on steep slopes, which is advantageous for extending the storage life of the combustion ash storage site. At the same time, it has the advantages of simple construction, relatively low construction costs, practicality, and high reliability, making it of good value for popular use.

[0031] What has been described above is merely a preferred embodiment of the present invention, and it should be noted that those skilled in the art may make some further modifications and improvements without departing from the overall concept of the present invention, which should also be considered within the protection scope of the present invention.

Claims

1. The slope anchor platform structure for a mountain-valley-type dry combustion ash storage site includes: at least one stage of anchor platform (2) installed on a soil slope (1); anchor grooves (3) installed in each stage of anchor platform (2); the anchor grooves (3) having a concave groove shape; an artificial seepage prevention lining layer (4) laid on the soil slope (1); the artificial seepage prevention lining layer (4) extending deep into the anchor grooves (3) along the slope of the soil slope (1) and the surface of the anchor platform (2); anti-pullout anchor rods (6) installed in the anchor grooves (3); and plain concrete (5) poured into the anchor grooves (3).

2. The slope anchor platform structure of the mountain-valley type dry combustion ash storage site as described in claim 1, characterized in that the artificial seepage prevention lining layer (4) adopts HDPE membrane, and the thickness of the HDPE membrane is 1.5 mm or more.

3. The slope anchor platform structure of a mountain-valley type dry combustion ash storage site as described in claim 1, characterized in that the angle between the anti-pullout anchor rod (6) and the anchor platform (2) is 45°.

4. The slope anchor platform structure for mountain-valley type dry combustion ash storage site as claimed in claim 1, characterized in that the rod body of the anti-pullout anchor rod (6) adopts hot-rolled ribbed steel bars.

5. The slope anchor platform structure of a mountain-valley type dry combustion ash storage site as described in claim 1, characterized in that the height difference between the anchor platforms (2) of each adjacent stage is not more than 10 m.

6. The slope anchor platform structure of a mountain-valley type dry combustion ash storage site as described in claim 1, characterized in that the cross section of the anchor groove (3) is rectangular, the cross-sectional size is width x height = 400 mm x 600 mm, the distance from the anchor groove (3) to the lower slope is 600 mm or more, and the distance from the anchor groove (3) to the upper slope is 600 mm or more.

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