Lattice column water stop construction method

Abstract

The invention relates to the technical field of constructional engineering such as subways and tunnels, in particular to a latticed column water stop construction method. The technological process mainly comprises the steps of preparation before construction, pile head elevation treatment of a cast-in-place pile 2 below the latticed column, pile head waterproof treatment, machining of inner and outer water stop pieces, welding of the inner and outer water stop pieces, brushing of the water stop pieces and the latticed column with cement for capillary crystallization and construction of a bottom plate structure. The problem that underground water rises along the latticed column to penetrate through the structure is solved, a waterproof closed loop is formed, the underground water is prevented from rising along the latticed column to rust a structure body, the durability of the structure is improved, and the waterproof performance is improved.

Description

Technical Field

[0001] The invention relates to the technical field of construction engineering such as subways and tunnels, and in particular to a lattice column water-stopping construction method. Background Art

[0002] With the development and progress of economy and technology, the construction industry has developed rapidly. Developers have maximized the use of land and expanded the area of ​​permanent structures to the greatest extent while meeting the setback requirements within the building red line. In order to ensure the safety of surrounding sites and underground municipal pipelines, government regulatory authorities have also strictly restricted the occupation of land outside the red line and required the protection of adjacent relationships. In order to reduce the amount of excavation and backfilling and shorten the construction period, construction units also tend to adopt support structures to ensure construction safety. Against this background, the internal support system has been rapidly developed and applied. When the internal support is constructed in a large span, lattice column support is generally used to solve its own gravity. The cross-sectional size of the concrete support system is optimized by the spacing of lattice columns to reduce the construction cost.

[0003] The lattice column is a temporary structure. The foundation is a cast-in-place pile below the structural bottom plate. The lattice column passes through the bottom plate and floor plate. Improper treatment of the lattice column passing through the structure is prone to water leakage. The traditional process leaves a construction joint for the lattice column part and then pours concrete. Due to the construction joint, there is a great risk of water leakage in the later stage. At present, there is a process of welding water stop plates on the outside of the lattice column, which cannot effectively prevent the water stop from rising along the inside of the column and penetrating the structure.

[0004] Based on the above technical difficulties, a lattice column waterproofing construction method is proposed to technically optimize the lattice column waterproofing. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a lattice column water-stopping construction method to achieve the technical effect of improving the waterproof performance of the lattice column.

[0006] To achieve this technical purpose, the present invention adopts the following scheme: A lattice column water-stopping construction method is carried out according to the following steps: S1. Preparation before construction: clean up the soil and debris in the pile head and lattice column cushion layer to prepare for subsequent construction; S2. Treatment of pile head elevation of cast-in-place pile under lattice column: chisel or fill the pile head to 100mm below the cushion layer and smooth it with fine stone concrete; S3. Pile head waterproofing: construct a waterproof layer at the junction of the cast-in-place pile and the cushion layer, wrap the lattice columns with the waterproof layer, and then construct a waterproof protective layer; S4. Processing of internal and external water stop plates: the internal and external water stop plates are butted and fitted with the angle steel columns; S5. Welding of inner and outer water stop plates. The inner and outer water stop plates are at the same height, close to the middle of the structural plate. The inner and outer water stop plates are welded to the angle steel column fillet welds respectively. The inner and outer water stop plates are welded to the horizontal welds. S6. Remove welding slag and apply cement penetration crystallization on the surface of column angle steel and water stop plate; S7. Structural construction, tying steel bars and pouring concrete.

[0007] Compared with the prior art, the present invention has the following beneficial effects: The present invention improves the waterproof performance of the lattice column by arranging internal and external water stop sheets and improving the welding process, making it difficult for groundwater to penetrate along the lattice column, thereby improving the durability of the lattice column.

[0008] Further, the preferred embodiment adopted by the present invention is: The waterproof layer is a polymer self-adhesive film waterproofing coil, and the height of the waterproof layer wrapping the lattice column from bottom to top is 200mm.

[0009] There are four inner water stop plates, each of which is a square structure, and one corner of each water stop plate is set as an arc-shaped notch. The four inner water stop plates are respectively set close to the inner side of the angle steel column, and the four inner water stop plates are spliced ​​to form a square structure with a circular hole in the center.

[0010] There are also four external waterstops, each of which is an L-shaped structure. The inner sides of the two sides of each external waterstop are respectively provided with grooves that are adapted to the angle steel columns. The angle steel columns are embedded in the interior of the external waterstops through the grooves; the four external waterstops are respectively assembled on the outer periphery of the angle steel columns. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 This is the installation diagram of internal and external water stop plates; Figure 3 It is a structural schematic diagram of the inner water stop; Figure 4 It is a structural schematic diagram of the external water stop; Markings in the figure are: 1. water stop plate; 11. inner water stop plate; 12. outer water stop plate; 121. groove; 2. cast-in-place pile; 3. cushion layer; 4. waterproof layer; 5. waterproof protective layer; 6. angle steel column. DETAILED DESCRIPTION

[0012] In order to fully understand the purpose, features and effects of the present invention, the following specific embodiments are provided. Figures 1 to 4 The present invention is described in detail with reference to the accompanying drawings, but the present invention is not limited thereto.

[0013] A lattice column water-stop construction method, the process flow of which mainly includes: preparation before construction - treatment of the pile head elevation of the cast-in-place pile 2 under the lattice column - waterproof treatment of the pile head - processing of internal and external water-stop plates - welding of internal and external water-stop plates - painting of water-stop plates and lattice columns with cement penetration crystallization - bottom plate structure construction, and the specific contents are carried out according to the following steps: S1. Preparation before construction: Clean the soil and debris in the pile head of the cast-in-place pile 2 and the cushion layer 3 of the lattice column to prepare for subsequent construction.

[0014] S2. Treatment of the pile head elevation of the cast-in-place pile 2 under the lattice column: The pile head of the cast-in-place pile 2 is chiseled or filled to a position 100mm below the cushion layer 3, and then smoothed with fine stone concrete.

[0015] S3. Pile head waterproofing: A waterproof layer 4 is constructed at the junction of the bored pile 2 and the cushion layer 3. The waterproof layer 4 uses a polymer self-adhesive waterproof membrane. The waterproof layer 4 wraps the lattice column 200mm upward from the cushion layer 3, and then a waterproof protective layer 5 is poured at this position. The pouring elevation of the waterproof protective layer 5 exceeds the surrounding thickness by 50mm.

[0016] S4. Processing inner and outer water stop plates: There are four inner water stop plates 11, and the structures of the four inner water stop plates 11 are the same. Each of them is a square structure, and one corner of each inner water stop plate 11 is set as an arc-shaped notch. The four inner water stop plates 11 are respectively set close to the inner side of the angle steel, and the four inner water stop plates 11 are spliced ​​into a square structure with a circular hole in the center; There are also four outer water stop plates 12, each of which is an L-shaped structure. The inner sides of the two sides of each outer water stop plate 12 are respectively provided with grooves 121 adapted to the angle steel column 6. The angle steel column 6 is embedded in the interior of the outer water stop plate 12 through the grooves 121. The four outer water stop plates 12 are respectively assembled on the outer periphery of the angle steel column 6 to form a square structure.

[0017] S5. Welding of inner and outer waterstops: The inner and outer waterstops are at the same height, close to the middle of the structural plate. The inner and outer waterstops are welded to the 6 corner welds of the angle steel columns respectively, and the inner and outer waterstops are welded to the horizontal welds.

[0018] S6. Remove welding slag and apply cement penetration crystallization on the surface of column angle steel and water stop plate 1.

[0019] S7. Structural construction includes tying steel bars and pouring concrete for the foundation slab. The concrete should be covered and maintained to keep it moist within 12 hours after pouring.

[0020] The present invention solves the problem of groundwater rising along the lattice columns and penetrating the structure by arranging inner and outer water stop plates, forming a waterproof closed loop, preventing groundwater from rising along the lattice columns and corroding the main structure, thereby improving the durability of the structure and improving the waterproof performance.

[0021] Finally, it should be noted that the above are only preferred embodiments of the present invention. Of course, those skilled in the art can make changes and modifications to the present invention. If these modifications and variations fall within the scope of the claims of the present invention and their equivalent technologies, they should be considered to be within the scope of protection of the present invention.

Claims

1. A lattice column water-stopping construction method is carried out according to the following steps: S1. Preparation before construction: clean up the soil and debris in the pile head and lattice column cushion layer to prepare for subsequent construction; Features: S2. Treatment of the pile head elevation of the cast-in-place pile under the lattice column: chisel or fill the pile head to 100mm below the cushion layer and smooth it with fine stone concrete; S3. Pile head waterproofing: construct a waterproof layer at the junction of the cast-in-place pile and the cushion layer, wrap the lattice columns with the waterproof layer, and then construct a waterproof protective layer; S4. Processing of internal and external water stop plates: the internal and external water stop plates are butted and fitted with the angle steel columns; S5. Welding of inner and outer water stop plates. The inner and outer water stop plates are at the same height, close to the middle of the structural plate. The inner and outer water stop plates are welded to the angle steel column fillet welds respectively. The inner and outer water stop plates are welded to the horizontal welds. S6. Remove welding slag and apply cement penetration crystallization on the surface of column angle steel and water stop plate; S7. Structural construction, tying steel bars and pouring concrete.

2. The lattice column water-stopping construction method according to claim 1, characterized in that: The waterproof layer is a polymer self-adhesive film waterproofing coil, and the height of the waterproof layer wrapping the lattice column from bottom to top is 200mm.

3. The lattice column water-stopping construction method according to claim 1, characterized in that: There are four inner water stop plates, each of which is a square structure, and one corner of each water stop plate is set as an arc-shaped notch. The four inner water stop plates are respectively set close to the inner side of the angle steel column, and the four inner water stop plates are spliced ​​to form a square structure with a circular hole in the center.

4. The lattice column water-stopping construction method according to claim 1, characterized in that: There are also four external waterstops, each of which is an L-shaped structure. The inner sides of the two sides of each external waterstop are respectively provided with grooves that are adapted to the angle steel columns. The angle steel columns are embedded in the interior of the external waterstops through the grooves; the four external waterstops are respectively assembled on the outer periphery of the angle steel columns.

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