Combined seepage draining and reinforcing system for titanium gypsum slag field

Abstract

The utility model discloses a combined seepage drainage reinforcement system of a titanium gypsum slag yard, which is formed by combining gravel piles (1), horizontal seepage drainage pipes (2) and vertical seepage drainage insertion plates (3), and the gravel piles (1) are arranged at the platform position of a step (4) of the titanium gypsum slag yard and are distributed in a rectangular shape; the horizontal drainage and seepage pipe (2) is laid in a drill hole from the slope toe position of a titanium gypsum slag yard step (4) to the interior of the slag yard, and the horizontal drainage and seepage pipe (2) is located between two rows of gravel piles; the vertical seepage drainage inserting plates (3) are arranged on the two sides of the horizontal seepage drainage pipes (2) embedded in the positions of the steps (4) of the titanium gypsum slag field. A'gravel pile + horizontal seepage drainage pipe + vertical seepage drainage inserting plate 'combined seepage drainage reinforcing system is formed, a vertical, horizontal and vertical combined three-dimensional seepage drainage mode is formed, the underground water level of a titanium gypsum slag field is reduced, the characteristics of high mechanical strength and good self-stability of titanium gypsum slag under a dry condition are reasonably utilized, and the stability of the titanium gypsum slag field is improved. And the stability of the side slope of the slag yard is improved in an economical and effective treatment mode.

Description

Technical Field

[0001] The utility model belongs to the field of safe and environmentally friendly management of industrial solid waste yards, and specifically relates to a titanium gypsum slag yard slope seepage drainage and reinforcement system. Background Art

[0002] In the common sulfuric acid production process of titanium dioxide, 6-12 tons of titanium gypsum slag are often produced for every ton of product produced. The main component of the titanium gypsum slag field is clay-like slag, which has engineering characteristics such as high water content, large porosity, high compressibility, low strength, low permeability, expansion when exposed to water, and shrinkage when dehydrated.

[0003] A large number of experiments have shown that titanium gypsum slag has relatively high mechanical strength under dry conditions and good self-stabilization performance. However, the huge output makes it very difficult to create dry storage conditions. The general method of natural valley storage is inevitably affected by rainwater infiltration. Long-term rainfall will gradually infiltrate into the slope of the slag yard. Due to the high water content and low permeability of titanium gypsum slag, the stagnant water cannot be discharged smoothly after rainwater infiltration, which raises the infiltration line, increases the downward force of the slag yard, and reduces the shear strength of the soil, seriously affecting the stability of the slag yard slope and threatening the lives and property of people downstream of the slag yard. Summary of the invention

[0004] The purpose of the utility model is to provide a combined drainage reinforcement system for a titanium gypsum slag yard in view of the defects of the existing low-permeability clay slag yard, such as poor overall permeability, slow drainage speed, and low stability of the slag yard slope.

[0005] In order to achieve the above-mentioned purpose of the utility model, the utility model provides a combined drainage reinforcement system for a titanium gypsum slag yard, which is composed of a combination of gravel piles, horizontal drainage pipes, and vertical drainage plugs; the gravel piles are arranged on the platform position of the steps of the titanium gypsum slag yard and are distributed in a rectangular shape. The purpose of arranging the gravel piles is to compact and reduce the gaps between the particles of the slag soil; the horizontal drainage pipes are laid in the drilled holes from the slope foot position of the steps of the titanium gypsum slag yard to the inside of the slag yard, and the horizontal drainage pipes are located between two rows of gravel piles; the vertical drainage plugs are arranged on both sides of the horizontal drainage pipes buried at the steps of the titanium gypsum slag yard, and the vertical drainage plugs vertically penetrate the slag to increase the vertical infiltration capacity of the slag soil.

[0006] Furthermore, the pile spacing of the gravel piles is 2 to 4 m, and the pile diameter is 0.6 to 1.2 m.

[0007] Furthermore, the spacing between the horizontal drainage pipes is 2 to 6 m, and the axis of the horizontal drainage pipes is inclined from the inside of the slope to the outside, with a slope angle of 3% to 5% with the horizontal plane, so as to facilitate the discharge of stagnant water.

[0008] Furthermore, the bottom of the vertical drainage plug plate is preferably 0.3 to 0.6 m away from the horizontal drainage pipe, and the spacing between the vertical drainage plug plates is preferably 0.5 to 1.0 m.

[0009] Furthermore, the horizontal drainage pipe is divided into a drainage section and a perforated section, wherein the drainage section is 5 to 10 m long, and the rest are perforated sections.

[0010] As a preferred embodiment of the present invention, the distance between the horizontal drainage pipe and the gravel pile (1) is 0.5 to 1.0 m.

[0011] As a preferred embodiment of the utility model, the eyelets of the pipe body of the eyelet section are arranged in a 60° plum blossom shape, and the eyelet spacing is 45 to 50 mm; the eyelet section is wrapped with geotextile and tied firmly, and the end is blocked with an oil-soaked wooden plug.

[0012] After adopting the above technical scheme, the utility model of a combined drainage and reinforcement system for titanium gypsum slag field has the following positive effects:

[0013] (1) First, gravel piles are arranged on the step platform of the titanium gypsum slag field to compact and reduce the gaps between soil particles, reduce the groundwater retention space, and accelerate the discharge of groundwater from the slag field;

[0014] (2) Horizontal drainage pipes are then arranged at the foot of the slope toward the platform to the vicinity of the gravel piles, thereby directing the water flow from the slag dump soil through the horizontal drainage pipes. The larger-sized gravel facilitates the vertical seepage of stagnant water to the horizontal drainage pipes.

[0015] (3) Finally, vertical drainage plugs are evenly arranged on both sides of the horizontal drainage pipes to vertically penetrate the slag, thereby increasing the vertical infiltration capacity of the soil and quickly diverting the water in the plugs to the horizontal drainage pipes to discharge the slag. Under the action of gravity, a drop funnel will be formed within the influence radius of the plugs, accelerating the drainage of the surrounding groundwater; the horizontal drainage pipes discharge the water vertically guided by the gravel piles and drainage plugs out of the slag slope, thereby lowering the slag infiltration line and increasing the stability of the slag.

[0016] (4) The utility model designs and adopts a combined drainage reinforcement system of "gravel piles + horizontal drainage pipes + vertical drainage plugs", forming a vertical and horizontal combined three-dimensional drainage method, which greatly reduces the groundwater level of the titanium gypsum slag field and significantly reduces the groundwater infiltration line of the titanium gypsum slag field. It also rationally utilizes the high mechanical strength and good self-stabilization performance of titanium gypsum slag under dry conditions to improve the stability of the slag field slope in an economical and effective way. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The utility model discloses a plan layout diagram of a combined drainage and reinforcement system for a titanium gypsum slag field.

[0018] Figure 2 yes Figure 1 Longitudinal section view.

[0019] Figure 3 It is a structural diagram of the horizontal seepage drainage pipe adopted by the utility model.

[0020] Figure 4 yes Figure 3 AA section view.

[0021] Figure 5 It is a spatial distribution diagram of the horizontal seepage drainage pipe and the vertical seepage drainage plug plate designed by the utility model.

[0022] Markings in the figure are: 1-gravel pile; 2-horizontal drainage pipe; 3-vertical drainage plug; 4-slag yard step. DETAILED DESCRIPTION

[0023] In order to better describe the present invention, the combined drainage and reinforcement system for a titanium gypsum slag field of the present invention is further described in detail below with reference to the accompanying drawings.

[0024] The slag field treated in the embodiment is a titanium gypsum slag field of a domestic titanium company. The slag field adopts a combined seepage reinforcement system of "gravel piles + horizontal seepage pipes + vertical seepage plugs" during the seepage reinforcement process. Figure 1 The utility model is a plan layout diagram of a combined drainage and reinforcement system for a titanium gypsum slag field and combined with Figure 2 , Figure 3 , Figure 4 , Figure 5 It can be seen that in the embodiment of the utility model of a combined drainage and reinforcement system for a titanium gypsum slag field, the following technical solutions are adopted:

[0025] In the embodiment, the drainage system is arranged with a slag field step 4 of 35m in length and 8m in width, a slag field step 4 of 17m in height, a crushed stone pile 1 with a pile diameter of 800mm, a pile spacing of 2m, and a total of 3 rows, 14 piles in each row, a total of 42 piles, and the pile length is affected by the original terrain of the surrounding valleys, and the length is between 5 and 17m. The crushed stone pile is constructed by dry vibration technology, and is constructed from the inside to the outside according to the skipping method, first in the middle and then on both sides, first inside the slope and then outside the slope. It is strictly forbidden to use the method of making piles from the outside to the inside. The material of the crushed stone pile 1 is hard crushed stone with a particle size of 2 to 4cm and a mud content of no more than 5%.

[0026] A total of 13 horizontal drainage pipes 2 are arranged, with a spacing of 2m and a length of 34~89m. The horizontal drainage pipe 2 uses Φ75×5.6UPVC pipes with an external compressive strength of 1MPa. It uses hot socket connection and is fixed with 4 wooden threads around the periphery. The horizontal drainage pipe 2 is laid by dry drilling, with a hole diameter of φ120, followed by a full-hole casing, and the slope of the angle between the axis of the borehole and the horizontal plane is 3%, with an error of less than 5‰. The drainage section of the horizontal drainage pipe is 10m long, and the rest is the flower eye section; the flower eyes of the pipe body are arranged in a plum blossom shape with a spacing of 60°, and the outer geotextile is tied firmly. The ends are plugged tightly with oil-soaked wooden plugs. See the attached for details. Figure 3 and attached Figure 4 .

[0027] The laying of horizontal drainage pipe 2 needs to be drilled from the foot of the slag step slope towards the slag platform. The borehole diameter is φ120mm, and the full hole casing is followed up. Clean water drilling is required. Mud wall protection is strictly prohibited. The slope of the angle between the borehole axis and the horizontal plane is 3%~5%, and the error shall not be greater than 5‰. The horizontal drainage pipe should be laid in time after the drilling construction is completed. The horizontal drainage pipe is connected by hot socket connection and fixed with 4 wooden threads around it. The casing will be removed after the horizontal drainage pipe is laid.

[0028] After the construction of the horizontal drainage pipe 2 is completed, the vertical drainage plug 3 is installed vertically along both sides of the horizontal drainage pipe 2 at the step platform position. The vertical drainage plug 3 is arranged on the step platform of the slag yard step 4. The material of the vertical drainage plug 3 is polyethylene or polypropylene. The plugs are distributed on both sides of each horizontal drainage pipe 2. The spacing between the drainage plugs is 0.5m. According to the different valley terrain, the installation depth is 10-17m. In the example, B-type plastic vertical drainage plugs are used. The width of the vertical drainage plug 3 is not less than 80mm and the thickness is not less than 4mm. The performance indicators are shown in Table 1. The plane position deviation of the vertical drainage plug 3 is less than 50mm, and the verticality deviation of the casing is less than 1.5%.

[0029]

[0030] The slope drainage work in the example is quite significant. After the completion of the construction, the water discharge of the horizontal drainage pipe 2 was relatively large in the early stage. The water discharge of a single horizontal drainage pipe 2 was 3.2-37.4L / h, and the total daily water discharge of 13 horizontal drainage pipes 2 was 5.75m³ on average. 3 to 4 months after the completion of the drainage reinforcement project, the drainage volume tended to be stable. The water discharge of a single horizontal drainage pipe 2 was 1.4-18.6L / h, and the total daily water discharge of 13 horizontal drainage pipes 2 was 3.24m³ on average.

[0031] By observing the water level observation wells on the slope of the slag dump and comparing the depth of the groundwater infiltration line of the slag dump before and after construction in the same season, it was found that the water level of the site dropped significantly after the construction, and the depth of the drop in different seasons was between 0.8 and 3.2 m, achieving unexpected technical results.

Claims

1. A combined drainage and reinforcement system for titanium gypsum slag field, characterized by: It is composed of a combination of gravel piles (1), horizontal drainage pipes (2), and vertical drainage plugs (3); the gravel piles (1) are arranged at the platform position of the titanium gypsum slag yard step (4) and are distributed in a rectangular shape; the horizontal drainage pipes (2) are laid in the drilled holes from the slope foot position of the titanium gypsum slag yard step (4) to the inside of the slag yard, and the horizontal drainage pipes (2) are located between two rows of gravel piles; and the vertical drainage plugs (3) are arranged on both sides of the horizontal drainage pipes (2) buried at the titanium gypsum slag yard step (4).

2. The combined drainage and reinforcement system for a titanium gypsum slag field according to claim 1, characterized in that: The pile spacing of the gravel piles (1) is 2 to 4 m, and the pile diameter is 0.6 to 1.2 m.

3. The combined drainage and reinforcement system for a titanium gypsum slag field according to claim 1, characterized in that: The spacing between the horizontal drainage pipes (2) is 2 to 6 m, and the axis of the horizontal drainage pipe (2) is inclined from the inside of the slope to the outside, and the angle between the horizontal plane and the slope is 3% to 5%.

4. The combined drainage and reinforcement system for a titanium gypsum slag field according to claim 1, characterized in that: The bottom of the vertical seepage drainage plug plate (3) is 0.3 to 0.6 m away from the horizontal seepage drainage pipe (2), and the spacing between the vertical seepage drainage plug plates (3) is 0.5 to 1.0 m.

5. The combined drainage and reinforcement system for a titanium gypsum slag field according to claim 1, characterized in that: The horizontal seepage drainage pipe (2) is divided into a drainage section and a perforated section, wherein the drainage section is 5 to 10 m long and the rest are perforated sections.

6. The combined drainage and reinforcement system for a titanium gypsum slag field according to claim 1, characterized in that: The distance between the horizontal drainage pipe (2) and the gravel pile (1) is 0.5 to 1.0 m.

7. The combined drainage and reinforcement system for a titanium gypsum slag field according to claim 5, characterized in that: The eyelets of the pipe body of the eyelet section are arranged in a 60° plum blossom shape, and the eyelet spacing is 45-50mm; the eyelet section is wrapped with geotextile and tied firmly, and the end is blocked with an oil-soaked wooden plug.

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