Method for additionally arranging steel plate lining on inner side of material blocking wall

Abstract

The invention discloses a method for additionally arranging a steel plate lining on the inner side of a retaining wall, which comprises the following steps of: removing a reinforcing steel bar protective layer on the inner side of an original retaining wall with problems, so that vertical reinforcing steel bars and horizontal reinforcing steel bars are completely exposed; fixing short steel bars on the exposed vertical steel bars; steel plate linings manufactured in advance are arranged on the inner side of the original material blocking wall in parallel at intervals, and the upper ends and the lower ends of the steel plate linings are effectively connected with the vertical steel bars through steel tie bars; anchor bars are arranged on the side, facing the original material blocking wall, of the steel plate lining at intervals in the vertical direction and the horizontal direction in advance; after the steps are completed, fine aggregate concrete can be poured into the gap between the newly-added steel plate lining and the inner wall of the original material blocking wall. By the adoption of the method, the inner side of the material blocking wall can be effectively reinforced, operation is easy, practice proves that the effect is quite remarkable, the wear resistance of the steel plate is far better than that of concrete, the single-time service cycle of the material blocking wall can be effectively prolonged after the steel plate lining is additionally arranged, and the maintenance cost is greatly reduced.

Description

Technical Field

[0001] The invention relates to a material retaining wall protection method, in particular to a method of adding a steel plate lining inside the material retaining wall. Background Art

[0002] Reinforced concrete retaining wall is a common structure in modern industry. It is widely used in mining, nonferrous metallurgy, coal and other industries. It is mainly used for the storage of bulk materials and block materials. According to the force form, it can be divided into cantilever retaining wall or plate retaining wall with buttresses. Retaining wall is usually not configured independently. Generally, a single-layer rack factory building is built on it to form a storage warehouse. The factory building is equipped with a crane that can run vertically to take and feed materials. At the same time, the roof is set on the top of the workshop and the wall is set on the side to prevent the weather from affecting the materials. Figure 2 The figure shows a typical storage workshop with retaining walls: reinforced concrete retaining walls on both sides and a steel structure single-story workshop on the top. In order to save investment and maximize the storage capacity of materials, the columns of the single-story rack workshop generally do not have a separate foundation, and the steel column base is directly set on the top of the retaining wall.

[0003] Since the retaining wall is made of reinforced concrete, the inner wall near the material storage side will be repeatedly impacted and worn by the materials during long-term use, causing partial or even large-scale damage and peeling of the surface concrete protective layer. This will cause the inner retaining wall's stress-bearing steel bars to be exposed, seriously affecting the retaining wall's service life, and causing structural safety hazards to the factory building supported on it. The traditional treatment method is to simply re-pour concrete outside the exposed inner steel bars. However, due to the poor wear resistance of concrete and the weak bond between the new and old concrete, damage will occur again in a short period of time, and the effect is not good. Summary of the invention

[0004] The purpose of the present invention is to provide a method for adding a steel plate lining inside a retaining wall. The method of the present invention can effectively reinforce the inside of the retaining wall, and after adding the steel plate lining, the single use cycle of the retaining wall can be effectively extended, greatly reducing maintenance costs.

[0005] The technical solution of the present invention is a method for adding a steel plate lining inside a retaining wall, comprising the following steps: S1: Remove the protective layer of the steel bars on the inner side of the original retaining wall with problems, so that the vertical and horizontal steel bars on the inner side of the original retaining wall are completely exposed; S2: short steel bars for anchoring are fixed on the exposed vertical steel bars, and the short steel bars are arranged at intervals in the vertical and horizontal directions; S3: A pre-made steel plate lining is set up in parallel at a certain distance inside the original retaining wall, and the upper and lower ends of the steel plate lining are effectively connected to the vertical steel bars by tie bars; anchor bars should also be set up in the vertical and horizontal directions at intervals on the side of the steel plate lining facing the original retaining wall; S4: After completing the above steps, fine stone concrete can be poured into the gap between the newly added steel plate lining and the inner wall of the original retaining wall.

[0006] In the aforementioned method of adding a steel plate lining to the inner side of the retaining wall, in S3, in order to avoid the steel plate lining being too long and difficult to install, it should be made in sections, and the length L of the steel plate lining section can be taken as 0.8 to 1.2 m. The specific installation steps are as follows: S3-1: Install the first layer of pre-made steel plate lining at a distance in parallel to the inner side of the original retaining wall, and effectively connect the upper and lower ends of the steel plate lining with the vertical steel bars by using tie bars; the steel plate lining should also be pre-installed with anchor bars in the vertical and horizontal directions at intervals on the side facing the original retaining wall; S3-2: Stagger the seams 50-80mm above the first layer of steel plate lining and install and fix the second layer of steel plate lining in the same manner as above; S3-3: After the second layer of steel plate lining is fixed in place, a 70-100 mm wide steel plate is used to seal the gap between the first layer of steel plate lining and the second layer of steel plate lining. After 2-3 layers of steel plate lining are installed, step S4 can be performed.

[0007] In the aforementioned method of adding a steel plate lining inside a retaining wall, in S1, the inner concrete portion is roughened when the steel bar protective layer is removed, and then a layer of plain cement slurry is brushed on the roughened concrete surface.

[0008] In the aforementioned method of adding a steel plate lining on the inner side of the retaining wall, in S2, the short steel bars can be of φ8-10 specifications, and their vertical and horizontal spacing can be taken as @500-600mm according to the vertical steel bar spacing in the original retaining wall, with a length of 95-105mm, and the short steel bars are welded and fixed to the vertical steel bars.

[0009] In the aforementioned method of adding a steel plate lining on the inner side of the retaining wall, in S3, the thickness of the steel plate lining is 6-8 mm; the anchor bar is φ8@400 mm, the position is staggered with the short steel bars, the length is 75-85 mm, and one end of the anchor bar is welded and fixed to the steel plate lining; the tie steel bars are arranged at the top and bottom of the steel plate lining, the tie steel bars are φ10, the two ends are vertically bent and welded and fixed to the vertical steel bars, and the spacing of the tie steel bars in the same row is the same as the spacing of the vertical steel bars.

[0010] In the aforementioned method of adding a steel plate lining on the inner side of the retaining wall, in S4, the grade of the poured fine stone concrete should be ≥C25.

[0011] In the aforementioned method of adding a steel plate lining on the inner side of the retaining wall, the distance between the newly added steel plate lining and the inner wall of the original retaining wall before the steel bar protective layer is removed should be ≥100mm.

[0012] Beneficial effects of the present invention: Compared with the prior art, the present invention aims at the drawbacks of the traditional treatment method after the concrete on the inner side of the retaining wall is peeled off, and proposes a new treatment method, namely, adding a steel plate lining method. The method of the present invention can effectively reinforce the inner side of the retaining wall, and the operation is relatively simple. It has been proved in practice that its effect is very significant. Since the wear resistance of the steel plate is much better than that of concrete, adding a steel plate lining can effectively extend the single use cycle of the retaining wall and greatly reduce the maintenance cost. It also ensures the safety of the upper plant structure. Compared with the traditional treatment method, the effect is more significant, economical and reasonable, and the construction operation is relatively simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 This is a structural diagram of an existing storage workshop with a retaining wall.

[0014] Figure numerals: 1-original retaining wall, 2-vertical steel bars, 3-horizontal steel bars, 4-short steel bars, 5-steel plate lining, 6-anchor bars, 7-tie bars, 8-steel plates, 9-fine stone concrete. DETAILED DESCRIPTION

[0015] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0016] Embodiments of the present invention: A method for adding a steel plate lining inside a retaining wall can be performed according to the following steps: First, roughen the concrete part of the original retaining wall 1 with problems so that the vertical steel bars 2 and the horizontal steel bars 3 on the inside of the original retaining wall 1 are completely exposed, and then a layer of plain cement slurry is brushed on the roughened inner surface of the original retaining wall 1; Second, short steel bars 4 for anchoring are welded on the exposed vertical steel bars 2. The short steel bars 4 can be of φ8-10 specifications, and the vertical and horizontal spacing can be set to about 500-600mm according to the spacing of the vertical steel bars 2 in the original retaining wall 1, and the length is about 100mm; Third, the pre-made steel plate lining 5 is effectively connected to the vertical steel bars 2 by welding the two ends of the tie steel bars 7. The steel plate lining 5 should be made in sections to avoid being too long and difficult to install. The general segment length L value can be taken as about 1.0m, and the thickness of the steel plate lining can generally be taken as 6-8mm. The anchor bars 6 should also be welded in advance on the segmented steel plate lining 5. The anchor bars 6 are φ8@400mm, and the position is staggered with the short steel bars 4. The length is about 80mm. In addition, in order to facilitate the positioning and temporary fixation of the steel plate lining 5 before pouring concrete, φ10 tie steel bars 7 should be set at both ends of the steel plate lining 5 made in each section. The tie steel bars 7 should be spot-welded to the vertical steel bars 2 in the original structure, and the spacing between them is the same as the spacing between the vertical steel bars 2. Fourth, the second layer of steel plate lining 5 is installed and fixed in the above-mentioned manner by staggering about 50 to 80 mm with the newly added first layer of steel plate lining 5. The purpose of the staggering is to leave space for welding the tie steel bar 7 at the bottom end of the second layer of steel plate lining 5 and the vertical steel bar 2; Fifth, after the second layer of steel plate lining 5 is fixed in place, a 70-100 mm wide and 6 mm thick steel plate 8 is used to block the above-mentioned reserved seam, and the steel plate 8 can be welded by continuous single-sided fillet weld; Sixth, after completing the above steps, fine stone concrete 9 with a grade not less than C25 can be poured in the gap between the newly added steel plate lining 5 and the inner wall of the original retaining wall 1. In order to ensure the pouring quality, generally 2 to 3 layers of steel plate lining 5 are installed, that is, fine stone concrete 9 is poured once, so as to ensure that the newly added concrete can be vibrated and compacted to ensure the pouring quality. The distance between the newly added steel plate lining 5 and the inner wall of the original retaining wall 1, that is, the value a in the figure should not be less than 100mm. According to the above steps, the steel plate lining 5 is installed from bottom to top in sections until the top of the original retaining wall 1. After the newly added fine stone concrete 9, steel plate lining 5, newly added short steel bars 4, and anchor bars 6 are integrated, the work of adding steel plate lining 5 is completed, and the original problems are also well solved. In actual use, all steel plate linings 5 ​​can be added according to the damage of the original retaining wall 1, or they can be used locally.

Claims

1. A method for adding a steel plate lining inside a retaining wall, characterized in that: The following steps are included: S1: removing the protective layer of the inner steel bars of the original retaining wall (1) with problems, so that the vertical steel bars (2) and the horizontal steel bars (3) inside the original retaining wall (1) are completely exposed; S2: short steel bars (4) for anchoring are fixed on the exposed vertical steel bars (2), and the short steel bars (4) are arranged at intervals in the vertical and horizontal directions; S3: a prefabricated steel plate lining (5) is arranged in parallel with the inner side of the original retaining wall (1) at a certain distance, and the upper and lower ends of the steel plate lining (5) are effectively connected to the vertical steel bars (2) by using tie bars (7); anchor bars (6) should also be arranged in advance at intervals in the vertical and horizontal directions on the side of the steel plate lining (5) facing the original retaining wall (1); S4: After completing the above steps, fine stone concrete (9) can be poured into the gap between the newly added steel plate lining (5) and the inner wall of the original retaining wall (1).

2. The method of adding a steel plate lining inside the retaining wall according to claim 1, characterized in that: In the above S3, in order to avoid the steel plate lining (5) being too long and difficult to install, it should be manufactured in sections. The length L of the steel plate lining (5) can be 0.8 to 1.2 m. The specific installation steps are as follows: S3-1: A prefabricated first layer of steel plate lining (5) is arranged at a distance and in parallel to the inner side of the original retaining wall (1), and the upper and lower ends of the steel plate lining (5) are effectively connected to the vertical steel bars (2) by using tie bars (7); anchor bars (6) should also be arranged in advance at intervals in the vertical and horizontal directions on the side of the steel plate lining (5) facing the original retaining wall (1); S3-2: stagger the seams 50 to 80 mm above the first layer of steel plate lining (5), and install and fix the second layer of steel plate lining (5) in the same manner as above; S3-3: After the second layer of steel plate lining (5) is fixed in place, a steel plate (8) with a width of 70 to 100 mm is used to seal the gap between the first layer of steel plate lining (5) and the second layer of steel plate lining (5). After 2 to 3 layers of steel plate lining (5) are installed, step S4 can be performed.

3. The method of adding a steel plate lining inside the retaining wall according to claim 1, characterized in that: In S1, when the steel bar protective layer is removed, the inner concrete part is roughened, and then a layer of plain cement slurry is brushed on the roughened concrete surface.

4. The method of adding a steel plate lining inside the retaining wall according to claim 1, characterized in that: In the S2, the short steel bars (4) may be of a size of φ8 to 10, and their spacing in the vertical and horizontal directions may be 500 to 600 mm according to the spacing of the vertical steel bars (2) in the original retaining wall (1), and their lengths may be 95 to 105 mm. The short steel bars (4) and the vertical steel bars (2) are fixed by welding.

5. The method of adding a steel plate lining inside the retaining wall according to claim 1, characterized in that: In the S3, the thickness of the steel plate lining (5) is 6 to 8 mm; the anchor bar (6) is φ8@400 mm, arranged at a staggered position with the short steel bars (4), and has a length of 75 to 85 mm. One end of the anchor bar (6) is welded and fixed to the steel plate lining (5); the tie bars (7) are arranged at the top and bottom of the steel plate lining (5), and the tie bars (7) are φ10. The ends of the tie bars (7) are vertically bent and welded to the vertical steel bars (2), and the spacing between the tie bars (7) is the same as the spacing between the vertical steel bars (2).

6. The method of adding a steel plate lining inside the retaining wall according to claim 1, characterized in that: In S4, the grade of the poured fine aggregate concrete (9) should be ≥ C25.

7. The method of adding a steel plate lining inside a retaining wall according to claim 1, characterized in that: The distance between the newly added steel plate lining (5) and the inner wall of the original retaining wall (1) before the steel bar protective layer is removed should be ≥100 mm.

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