Device for removing and recycling steel waist beam of anchor-type row pile temporary support

Abstract

This utility model discloses a device for dismantling and recycling a temporary steel wainscoting support for anchored pile foundations. The device includes pile foundations, a steel wainscoting, prestressed anchor cables, and a basement structural wall. Positioning ribs are provided around the prestressed anchor cables, and these ribs are fixedly connected to the steel wainscoting. Support rods are connected to the positioning ribs, and these support rods are connected to the basement structural wall via force-transmitting screws. A backfill trench is filled between the basement structural wall and the pile foundations, with the backfill height lower than the steel wainscoting. A steel wainscoting pad is placed between the backfill and the steel wainscoting. Compared with existing technologies, this utility model provides support between the steel wainscoting and the completed basement structural wall, using this support to balance the imbalance of prestress in the anchor cables during the dismantling of the steel wainscoting. This construction technique allows for the gradual dismantling of the temporary steel wainscoting support for anchored pile foundations, avoiding resource waste, saving economic costs, and ensuring safety and reliability.

Description

Technical Field

[0001] This utility model relates to the field of temporary support technology for building foundation and substructure engineering, and in particular to a device for dismantling and recycling steel wainscoting for temporary support of anchored piles. Background Technology

[0002] Foundation engineering is the starting point of building construction. To ensure the safety and reliability of construction, more and more engineering support methods adopt anchored piles for temporary support. The piles are made of reinforced concrete, and the anchor cables and steel girders are constructed as the earthwork is excavated. After the basement structure is completed, the trench between the support and the basement structure is backfilled. Because the steel girders are anchored with prestressed anchor cables, arbitrarily removing them poses a major safety hazard. Therefore, many construction sites do not remove the steel girders and directly bury them in the backfill soil of the trench, resulting in a waste of resources.

[0003] In order to address the shortcomings of existing technologies, this utility model proposes a construction technology for the dismantling and recycling of temporary support steel waist beams using anchored piles, based on literature review and relevant calculations. This technology can ensure that the dismantling of steel waist beams can be carried out in a safe, step-by-step and systematic manner. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model provides a device for dismantling and recycling the steel wainscoting of the temporary support structure of anchored piles. A support is installed between the steel wainscoting and the completed basement structural wall to balance the imbalance of anchor cable prestress during the dismantling process. This construction technique allows for the gradual dismantling of the steel wainscoting of the temporary support structure, avoiding resource waste, saving economic costs, and ensuring safety and reliability.

[0005] To achieve this technical objective, the present invention adopts the following solution: A device for dismantling and recycling a temporary support steel wainscoting of anchored piles includes piles, a steel wainscoting, prestressed anchor cables, and a basement structural wall. The piles, steel wainscoting, and prestressed anchor cables form an anchored pile temporary support structure. Positioning bars are provided around the prestressed anchor cables and are fixedly connected to the steel wainscoting. Support rods are connected to the positioning bars and are connected to the basement structural wall through force-transmitting screws. Backfill soil is filled between the basement structural wall and the piles. The height of the backfill soil is lower than that of the steel wainscoting. Steel wainscoting pads are placed between the backfill soil and the steel wainscoting.

[0006] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model provides a device for dismantling and recycling the steel wainscoting of the temporary support for anchored piles. A support is set between the steel wainscoting and the completed basement structural wall to balance the imbalance of the anchor cable prestress during the dismantling of the steel wainscoting. This construction technology allows for the gradual dismantling of the steel wainscoting of the temporary support for anchored piles, avoiding resource waste, saving economic costs, and ensuring safety and reliability.

[0007] Furthermore, the steel waist beam is made of two steel sections connected by steel plates, forming a gap between the two steel sections. The prestressed anchor cable passes through the gap in the steel waist beam and enters the anchoring soil layer.

[0008] Furthermore, wooden pads and waterproof additional sheets are installed between the force transmission screw and the basement structural wall.

[0009] Furthermore, a waterproof layer is installed on the outside of the basement structural walls, and a waterproof protective layer is installed on the outside of the waterproof layer, with the waterproof protective layer extending to the bottom elevation of the steel wainscoting.

[0010] Furthermore, the support rod is a tubular structure, the force transmission screw is an adjustable U-shaped support, and the support rod, positioning rib, and force transmission screw are all plug-in connected. Attached Figure Description

[0011] Figure 1 This is a side view of the removal of the temporary support steel waist beam for the anchored pile in an embodiment of this utility model.

[0012] Figure 2 This is a detailed drawing of the dismantling of the steel waist beam for temporary support of the anchored pile in this embodiment of the present invention.

[0013] Figure 3 This is an elevation view of the removal of the temporary support steel waist beam for the anchored pile in this embodiment of the present invention.

[0014] The markings in the diagram are as follows: 1. Piles; 2. Steel wainscoting; 3. Prestressed anchor cables; 4. Steel wainscoting gaps; 5. Positioning bars; 6. Basement structural walls; 7. Waterproofing layer; 8. Waterproofing protective layer; 9. Backfill soil in the trench; 10. Steel wainscoting pads; 11. Support rods; 12. Force transmission screws; 13. Wooden blocks; 14. Waterproofing supplementary sheets. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0016] Please see Figures 1 to 3This utility model provides a device for dismantling and recycling the steel waist beam of the temporary support of the anchored pile, involving components including pile 1, steel waist beam 2, prestressed anchor cable 3, steel waist beam gap 4, positioning bar 5, basement structural wall 6, waterproof layer 7, waterproof protective layer 8, backfill soil 9, steel waist beam pad 10, support rod 11, force transmission screw 12, pad 13, and waterproof additional plate 14.

[0017] The pile 1 is a reinforced concrete structure, which together with the steel waist beam 2 and the prestressed anchor cable 3 forms a pull-anchored pile temporary support structure. The steel waist beam 2 is formed by connecting two steel sections (channel steel or I-beam) together with steel plates, forming a steel waist beam gap 4 between the two steel sections. The prestressed anchor cable 3 passes through the steel waist beam gap 4 and enters the anchoring soil layer.

[0018] The prestressed anchor cable 3 is surrounded by positioning bars 5, which are fixedly connected to the steel waist beam 2. The positioning bars 5 are connected to the support rod 11, which is connected to the basement structural wall 6 through the force transmission screw 12. The force transmission screw 12 and the basement structural wall 6 are provided with a pad 13 and a waterproof additional plate 14.

[0019] A waterproof layer 7 is installed on the outer side of the basement structural wall 6, and a waterproof protective layer 8 is installed on the outer side of the waterproof layer 7. A trench is formed between the basement structural wall 6 and the pile 1. Backfill soil 9 is backfilled into the trench, and the height of the backfill soil 9 is lower than that of the steel lintel 2 to be demolished. A steel lintel pad 10 is installed between the backfill soil 9 and the steel lintel 2.

[0020] The steel wainscoting 2 is the structure to be dismantled and recycled in this utility model. Since the steel wainscoting 2 is connected to the prestressed anchor cable 3, the prestressed anchor cable 3 needs to be removed before the steel wainscoting 2 can be dismantled. In order to recycle the steel wainscoting 2, the key technology is to release the prestressed anchor cable 3 from the steel wainscoting 2. If the prestressed anchor cable 3 is cut directly, the support system will collapse, or during the dismantling process, due to the difference in the number of prestressed anchor cables 3 on the left and right sides, an imbalance of force will occur, causing the steel wainscoting 2 to break apart, which will pose a safety threat to the dismantling personnel.

[0021] To solve the above problems, this utility model provides a device for dismantling and recycling the temporary support steel waist beam of the anchored pile, and its construction process is as follows: layout and positioning → underground structure and waterproofing construction → backfilling of the first layer of trench → setting of steel waist beam pads → fixing of positioning bars → installation of support rods and force transmission screws → release of the first prestressed anchor cable of the first row of steel beams → release of the second prestressed anchor cable of the first row of steel beams → release of the nth prestressed anchor cable of the first row of steel beams → complete dismantling of the first row of steel waist beams → backfilling of the second layer of trench → subsequent dismantling is the same as above.

[0022] The specific procedures and precautions are as follows: Before dismantling the steel wainscoting 2, the construction of the basement structural walls 6, waterproof layer 7, waterproof protective layer 8, and backfill soil 9 in the trench must be completed. The concrete strength of the basement structural walls 6 must reach the design strength. The waterproof protective layer 8 must be constructed to the bottom elevation of the steel wainscoting 2. The backfill soil 9 must be constructed to a position two bricks below the steel wainscoting 2. The backfill soil 9 must be compacted before the steel wainscoting 2 is dismantled, with a compaction coefficient of 0.94 or higher. Steel wainscoting pads 10 should be placed on the backfill soil 9 along the lower edge of the steel wainscoting 2. The steel wainscoting pads 10 should be made of red bricks to prevent the steel wainscoting 2 from falling and injuring people after dismantling. Positioning bars 5 should be welded around the prestressed anchor cables 3 of the steel wainscoting 2. The positioning bars 5 should be made of φ20mm round steel and welded to the steel wainscoting 2 using four-sided corner welds.

[0023] Insert one end of the support rod 11 into the positioning rib 5 and the other end into the force transmission screw 12. Place a wooden pad 13 and a waterproof additional sheet 14 between the force transmission screw 12 and the waterproof layer 7 of the basement structural wall 6. Connect the steel wainscoting 2 and the basement structural wall 6 through the support rod 11 and the force transmission screw 12. After the force transmission screw 12 is tightened and begins to bear force, it is forbidden to continue to apply load.

[0024] The support rod 11 is made of 3.5*48mm steel pipe, the force transmission screw 12 is made of φ34mm adjustable U-shaped support, the pad 13 is made of 40*70mm cross-sectional timber, and the waterproof additional sheet 14 is made of 4mm thick modified SBS waterproof membrane.

[0025] After the backfill soil 9 is in place, the force transmission screw 12 begins to bear force. After the steel waist beam pad 10 is in place, the dismantling of the steel waist beam 2 begins. During dismantling, professional gas cutters use a gas cutting gun to cut the first prestressed anchor cable 3 at each anchoring node through the gap 4 of the steel waist beam. After the first prestressed anchor cable 3 is completed, the second prestressed anchor cable 3 is cut, and so on, cutting all the prestressed anchor cables 3 at each anchoring node one by one. It is strictly forbidden to cut all the prestressed anchor cables 3 at each anchoring node at once. During the dismantling process, the difference in the number of prestressed anchor cables 3 between adjacent anchoring nodes should be only 1. The prestress design value of the prestressed anchor cable 3 should not exceed 210KN. If this limit is exceeded, the number and form of the support rod 11 and the force transmission screw 12 need to be calculated separately.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. If these modifications and variations fall within the scope of the claims of this utility model and their equivalents, they should be considered to be within the protection scope of this utility model.

Claims

1. A device for dismantling and recycling a steel wainscoting for temporary support of anchored pile foundations, comprising pile foundations (1), steel wainscoting (2), prestressed anchor cables (3), and basement structural walls (6), wherein the pile foundations (1), the steel wainscoting (2), and the prestressed anchor cables (3) form an anchored pile foundation temporary support structure, characterized in that, The prestressed anchor cable (3) is surrounded by positioning bars (5), which are fixedly connected to the steel waist beam (2). The positioning bars (5) are connected to the support rod (11), which is connected to the basement structural wall (6) through the force transmission screw (12). The basement structural wall (6) and the pile (1) are filled with backfill soil (9), the height of which is lower than that of the steel waist beam (2). The backfill soil (9) and the steel waist beam (2) are provided with steel waist beam pads (10).

2. The device for dismantling and recycling the anchored pile temporary support steel girders according to claim 1, characterized in that, The steel waist beam (2) is made of two steel sections connected by steel plates, forming a steel waist beam gap (4) between the two steel sections. The prestressed anchor cable (3) passes through the steel waist beam gap (4) and enters the anchoring soil layer.

3. The device for dismantling and recycling the anchored pile temporary support steel girders according to claim 1, characterized in that, A wooden pad (13) and a waterproof additional sheet (14) are provided between the force transmission screw (12) and the basement structural wall (6).

4. The device for dismantling and recycling the anchored pile temporary support steel girders according to claim 1, characterized in that, A waterproof layer (7) is installed on the outside of the basement structural wall (6), and a waterproof protective layer (8) is installed on the outside of the waterproof layer (7). The waterproof protective layer (8) is constructed up to the bottom elevation of the steel wainscoting (2).

5. The device for dismantling and recycling the steel wainscoting of the temporary support for anchored pile banks according to claim 1, characterized in that, The support rod (11) is a tubular structure, the force transmission screw (12) is an adjustable U-shaped support, and the support rod (11) is plugged into the positioning rib (5) and the force transmission screw (12).

Images