阅读说明：本技术 冶金炉渣边坡复绿方法 (Metallurgical slag slope greening method ) 是由 郑绍元 宋建川 蒋军 李晏 于 2019-09-29 设计创作，主要内容包括：本发明公开了一种冶金炉渣边坡复绿方法,涉及边坡复绿方法领域,提供一种适用于冶金炉渣边坡,对边坡加固效果好的边坡复绿方法。冶金炉渣边坡复绿方法包括以下步骤：A、在边坡上打入中空锚杆；B、通过中空锚杆向边坡内灌注水泥浆,并等待水泥浆固结；C、在边坡上挂网,具体是沿边坡铺设铁丝网,铁丝网与中空锚杆连接；D、在挂网的边坡上喷播类壤土底基层,类壤土底基层与炉渣结合；E、在类壤土底基层上喷播类壤土表层,类壤土表层包括植被种子和植被种子生长所需的物质；F、进行养护,保证类壤土表层植被生长。本发明简单、实用,炉渣边坡复绿后,渣体稳定,植被无需养护,能够恢复到自然生态。(The invention discloses a method for greening a metallurgical slag side slope, relates to the field of side slope greening methods, and provides a side slope greening method which is suitable for the metallurgical slag side slope and has a good side slope reinforcing effect. The method for greening the metallurgical slag slope comprises the following steps: A. driving a hollow anchor rod into the side slope; B. grouting cement slurry into the side slope through the hollow anchor rod, and waiting for the cement slurry to be solidified; C. hanging a net on the side slope, specifically laying a wire netting along the side slope, and connecting the wire netting with the hollow anchor rod; D. spraying a loam-like soil subbase layer on the side slope with the net, wherein the loam-like soil subbase layer is combined with the furnace slag; E. spraying a loam-like soil surface layer on the loam-like soil subbase layer, wherein the loam-like soil surface layer comprises vegetation seeds and substances required by the growth of the vegetation seeds; F. and (5) maintaining to ensure the growth of the vegetation on the loam-like surface. The method is simple and practical, after the furnace slag side slope is regreened, the slag body is stable, the vegetation does not need to be maintained, and the natural ecology can be recovered.)

1. The method for greening the metallurgical slag slope is characterized by comprising the following steps: the method comprises the following steps:

A. a hollow anchor rod (2) is driven into the side slope (1);

B. grouting cement paste into the side slope (1) through the hollow anchor rod (2), and waiting for the cement paste to be solidified;

C. hanging a net on the side slope (1), specifically laying a wire netting (3) along the side slope (1), wherein the wire netting (3) is connected with the hollow anchor rod (2);

D. spraying and seeding a loam-like subbase (4) on the netted slope (1), wherein the loam-like subbase (4) is combined with the slag;

E. spraying a loam-like soil surface layer (5) on the loam-like soil subbase layer (4), wherein the loam-like soil surface layer (5) comprises vegetation seeds and substances required by the growth of the vegetation seeds;

F. and (5) maintaining to ensure the vegetation growth on the loam-like surface layer (5).

2. The metallurgical slag slope regreening method of claim 1, wherein: in the step A, the hollow anchor rod (2) is a steel pipe anchor rod with thorns.

3. The metallurgical slag slope regreening method of claim 2, wherein: the length of the hollow anchor rod (2) is 2-3 m, the length of the hollow anchor rod (2) exposed out of the side slope (1) is 15-20 cm, and the diameter of the hollow anchor rod (2) is 40-50 mm.

4. The metallurgical slag slope regreening method of claim 1, wherein: in the step B, the cement slurry is 1:1 sand-containing cement slurry; the grouting of cement paste is stopped when cement paste is blown out from the port of the hollow anchor rod (2).

5. The metallurgical slag slope regreening method of claim 1, wherein: in the step D, the thickness of the loamy soil subbase layer (4) is 14-17 cm.

6. The metallurgical slag slope regreening method of claim 1, wherein: in the step E, the thickness of the loamy soil surface layer (5) is 5-8 cm.

Technical Field

The invention relates to the field of a side slope greening method, in particular to a metallurgical slag side slope greening method.

Background

A large amount of slag is generated in steel-making production, and the slag is often sent into a slag yard to be stacked, so that a large-area exposed slag slope is formed in a long time, and the ecological environment is influenced. The slag side slope is of a discrete body structure, and has poor stability compared with the conventional soil side slope, and the slope slag body always has the risk of sliding along the slope surface of the side slope from high to low in a discrete body shape.

In order to protect the ecological environment, the furnace slag side slope needs to be greened again. The slag side slope has poor stability, so that the side slope is more difficult to regress. Through retrieval, a plurality of patents for the slope greening method exist, but no method specially aiming at the slope greening of the metallurgical slag is found. Some existing slope greening methods have the process steps of slope stabilizing, but are all directed at the conventional soil slope, and if the method is applied to the metallurgical slag slope, the effect is poor.

For example, chinese patent application No. 201810946606.2 discloses an ecological protection method for a side slope of a railroad bed. The method comprises the following steps: (1) and (3) cleaning a roadbed slope: reducing the height and gradient of the side slope by a slope cutting and load reducing method, leveling and compacting the surface, removing hard protrusions on the surface, and spraying water in proper amount to keep the surface moist; (2) laying geogrids for slope reinforcement: paving the geogrid from bottom to top, enabling the geogrid to be exposed out of the slope surface to reach 18-20 cm in height, then turning, and fixing the geogrid on the slope surface by using a U-shaped clamp; filling local soil or gravel in the geogrid, wherein the thickness of the filled local soil or gravel is 3-5 cm; (3) spray seeding and planting: carrying out seed spray-seeding on the reinforced railway slope in a loam-like spray-seeding mode, wherein the concrete spray-seeding process is as follows: (3.1) mixing and stirring the loam-like matrix agent and part of the base material uniformly in proportion, spraying the mixture to the surface of the reinforced slope by using spray-seeding equipment to form a loam-like subbase layer, wherein the thickness of the subbase layer is 7-8 cm; (3.2) mixing and stirring the loam-like matrix agent, the base materials and the plant seeds uniformly according to a proportion, and performing secondary spraying on the subbase layer by using spraying and sowing equipment to form a loam-like surface layer, wherein the thickness of the surface layer is 5-8 cm; (4) maintenance management: and after the spray sowing is finished, covering the surface with non-woven fabrics, watering, fertilizing, reseeding and pest control at regular intervals, and removing the non-woven fabrics when the seeds germinate and the height of the seedlings reaches 7-9 cm. The method depends on geogrid coverage to reinforce the side slope and is difficult to adapt to the requirements of the slag side slope.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the side slope greening method is suitable for metallurgical slag side slopes and has a good side slope reinforcing effect.

The technical scheme adopted for solving the problems is as follows: the method for greening the metallurgical slag slope comprises the following steps:

A. driving a hollow anchor rod into the side slope;

B. grouting cement slurry into the side slope through the hollow anchor rod, and waiting for the cement slurry to be solidified;

C. hanging a net on the side slope, specifically laying a wire netting along the side slope, and connecting the wire netting with the hollow anchor rod;

D. spraying a loam-like soil subbase layer on the side slope with the net, wherein the loam-like soil subbase layer is combined with the furnace slag;

E. spraying a loam-like soil surface layer on the loam-like soil subbase layer, wherein the loam-like soil surface layer comprises vegetation seeds and substances required by the growth of the vegetation seeds;

F. and (5) maintaining to ensure the growth of the vegetation on the loam-like surface.

Further, the method comprises the following steps: in the step A, the hollow anchor rod is a steel pipe anchor rod with thorns.

Further, the method comprises the following steps: the length of the hollow anchor rod is 2-3 m, the length of the hollow anchor rod exposed out of the side slope is 15-20 cm, and the diameter of the hollow anchor rod is 40-50 mm.

Further, the method comprises the following steps: in the step B, the cement slurry is 1:1 sand-containing cement slurry; and stopping grouting when cement slurry overflows from the port of the hollow anchor rod.

Further, the method comprises the following steps: in the step D, the thickness of the loamy soil subbase layer is 14-17 cm.

Further, the method comprises the following steps: in the step E, the thickness of the loamy soil surface layer is 5-8 cm.

The invention has the beneficial effects that: 1. according to the invention, the hollow anchor rod is driven into the side slope, cement slurry is poured into the side slope through the hollow anchor rod, and the cement slurry flows into the slag gap, so that the slag is reinforced, the slag is prevented from slipping, and the stability of a loam-like subbase layer, a loam-like surface layer and growing vegetation of subsequent spray seeding is also ensured.

2. The technology is simple and practical, after the furnace slag slope is regreened, the slag body is stable, the vegetation does not need to be maintained, and the natural ecology can be recovered.

Drawings

FIG. 1 is a schematic view of a metallurgical slag slope regreening process;

labeled as: side slope 1, hollow stock 2, wire netting 3, loam-like subbase 4, loam-like surface layer 5.

Detailed Description

The invention is further described with reference to the following figures and detailed description.

The method for greening the metallurgical slag slope comprises the following steps: A. a hollow anchor rod 2 is driven into the side slope 1; B. grouting cement paste into the side slope 1 through the hollow anchor rod 2, and waiting for the cement paste to be solidified; C. hanging a net on the side slope 1, specifically laying a wire netting 3 along the side slope 1, wherein the wire netting 3 is connected with a hollow anchor rod 2; D. spraying a soil-like subbase layer 4 on the side slope 1 with the net, wherein the soil-like subbase layer 4 is combined with the slag; E. spraying a loam-like soil surface layer 5 on the loam-like soil subbase layer 4, wherein the loam-like soil surface layer 5 comprises vegetation seeds and substances required by the growth of the vegetation seeds; F. and (5) maintaining to ensure the growth of the vegetation on the loam-like surface layer 5.

In step a, the hollow anchor 2 is preferably an existing barbed steel tube anchor. The parameters of the hollow anchor rod 2 are preferably as follows: the length of the hollow anchor rod 2 is 2-3 m, the length of the hollow anchor rod 2 exposed out of the side slope 1 is 15-20 cm, and the diameter of the hollow anchor rod 2 is 40-50 mm.

When the hollow anchor rod 2 is driven into the side slope 1, the hollow anchor rod 2 close to the top of the side slope 1 is driven into the side slope, and the driving can be carried out on the top of the side slope. However, the hollow anchor rod 2 far away from the top of the slope is difficult to drive into the top of the slope, and a corresponding construction platform is needed to drive on the construction platform. Specifically, the following may be mentioned: firstly, operating on the top of a slope, and driving a hollow anchor rod 2 close to the top of the slope; and then the construction platform is placed on the side slope 1, the construction platform is dragged by using the existing hollow anchor rod 2, and the construction platform is prevented from moving downwards, so that the stability of the construction platform is ensured, and the driving-in operation of the hollow anchor rod 2 can be carried out on the construction platform. Repeating the above operation, gradually moving down the construction platform, so that the hollow anchor rod 2 can be driven in the whole range of the side slope 1.

In the step B, the cement slurry is preferably 1:1 sand-containing cement slurry; and stopping grouting when cement slurry overflows from the port of the hollow anchor rod 2. After the cement paste is solidified, the hollow anchor rod 2 can be subjected to an inclined pulling test to test the connection reliability.

In the step C, the wire mesh 3 is preferably No. 14 hot-dip galvanized wire mesh, the grid specification is 10cm multiplied by 10cm, the lap joint distance is not less than 10cm, and the lapping and the attaching to the side slope 1 are ensured. Wire netting 3 is spread between cavity stock 2, can adopt the iron wire to be connected wire netting 3 and cavity stock 2.

And D, spraying the soil-like subbase layer 4, and conveying the mixed soil-like subbase layer 4 substrate to a spraying pipe orifice by using a spraying pump and an air compressor to spray the mixed soil-like subbase layer 4 substrate onto the side slope 1 after being meshed. The spraying should be carried out from the front as far as possible, the spraying of the concave-convex part and the dead angle part should be sufficient, the expansion action should be formed at the moment of spraying, the slag medium is locked, the friction force between the slag is improved, and the matrix is adhered to the side slope 1. During construction, the mixing proportion of various materials is approved, the mixed and stirred matrix has a good structure, moderate water content and a pH value of 6-7, and the soil with complete organic matters and mineral nutrient elements can reinforce the soil, improve the stability of a spray-seeding layer and reduce the cracking phenomenon of the mixed matrix before germination. The thickness of the loamy soil subbase layer 4 is preferably 14-17 cm, so that the organic matrix can provide nutrients and water required by plant growth.

In step E, the preparation process of the loam-like surface 5 substrate is as follows: mixing the selected grass seeds and tree seeds which are suitable for the growth of the area and have developed root systems, strong drought resistance and high temperature resistance, adding sieved humus soil, a binder, fibers, a compound fertilizer and a loam surface agent, and then uniformly mixing. The thickness of the loam-like soil surface layer 5 is preferably 5-8 cm. The spraying needs to be in place and sufficient to meet the basic requirements of plant growth, the proportion of trees and shrubs is controlled within a range suitable for vegetation growth by adjusting the surface loam surface layer 5 matrix, the gradual stable and reasonable issued pattern development is carried out on the spatial arrangement, and the stability of the side slope 1 is improved.

Covering a sunshade net and maintaining in time after spray seeding is finished, strengthening nursery stock management in the initial maintenance stage, loosening soil, irrigating, fertilizing and pruning to achieve target management, comprehensively surveying vegetation growth conditions in the maintenance process, and taking certain plant supplement measures for natural disasters and artificial damages.

After the construction is finished, the greening rate of the slope surface in 3 months is 30 percent, reaches 50 percent in 6 months, and reaches 75 percent in 1 year.