Reservoir raft post-cast strip construction method

Abstract

The reservoir raft post-cast strip construction method comprises the following steps that S1, upper wedge-shaped grooves are formed in the positions, on the upper portions of water stop steel plates on the two sides, of a raft post-cast strip respectively, and lower wedge-shaped grooves are formed in the lower portions of the water stop steel plates respectively; s2, upper fish scale templates are arranged in the wedge-shaped grooves in the upper portions of the two sides, and an adjustable jacking A and an adjustable jacking B are arranged between the upper fish scale templates on the two sides for supporting; lower fish scale templates are arranged in the lower wedge-shaped grooves in the two sides, and supports are arranged on the lower fish scale templates on the two sides for supporting; s3, raft concrete is poured; s4, removing the upper fish scale template and the lower fish scale template; s5, expansion water stop strips are arranged on the two sides of the post-cast strip; and S6, post-cast strip concrete is poured, and construction of the reservoir raft post-cast strip is completed. According to the reservoir raft post-cast strip construction method, the problem that in a traditional post-cast strip construction method, water stop is prone to being damaged due to the fact that a concrete bonding layer is manually treated is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of raft slab post-casting strip construction, and in particular relates to a method for constructing a raft slab post-casting strip of a reservoir. Background Art

[0002] In the construction of the post-casting joint of the raft slab, the traditional construction method is to reserve the position of the post-casting joint on the raft slab, set up a template at the post-casting position, remove the template after the raft slab concrete is poured, and then manually treat the concrete bonding surface. Since a water stop is set at the position of the post-casting joint, it is easy to damage the water stop when treating the bonding surface. At the same time, the concrete bonding surface is time-consuming and labor-intensive, and the treatment effect is not ideal. Summary of the invention

[0003] The purpose of the present invention is to provide a method for constructing a post-casting strip of a raft slab in a water storage tank, which solves the problem that in a traditional post-casting strip construction method, the water stop is easily damaged by artificially processing the concrete bonding surface.

[0004] The technical solution adopted by the present invention is a method for constructing a post-casting strip of a raft slab of a water storage tank, comprising the following steps: S1. Upper wedge-shaped grooves are respectively arranged on the upper part of the water-stopping steel plates on both sides at the position of the post-cast strip of the raft slab of the reservoir, and lower wedge-shaped grooves are respectively arranged on the lower part of the water-stopping steel plates on both sides; S2. Upper fish scale templates are arranged in the upper wedge-shaped grooves on both sides, and a number of adjustable top supports A and adjustable top supports B are arranged between the upper fish scale templates on both sides for support; lower fish scale templates are arranged in the lower wedge-shaped grooves on both sides, and a number of brackets are arranged on the lower fish scale templates on both sides for support; S3, pouring raft concrete; S4, removing the upper fish scale template and the lower fish scale template; S5. Expansion water stop strips are installed on both sides of the post-cast strip at the post-cast strip protective layer; S6. Pour the post-cast joint concrete to complete the post-cast joint construction of the reservoir raft slab.

[0005] The present invention is also characterized in that: In S1, the common cross-section of the upper wedge-shaped groove and the lower wedge-shaped groove on the same side is "trapezoidal", the depth of the upper wedge-shaped groove and the lower wedge-shaped groove on the same side are both 8cm-10cm, and the height of the upper wedge-shaped groove and the lower wedge-shaped groove on the same side is 15cm-18cm in total.

[0006] The distances between the adjustable top supports A and the adjustable top supports B in S2 are all 45cm-50cm.

[0007] The cross-sections of several supports in S2 are all "human" shaped, one end of several supports is fixedly connected to the lower fish scale formwork, and the other end of several supports is fixedly connected to the steel bars at the bottom of the raft slab of the reservoir.

[0008] The spacing between several brackets in S2 is 45cm-50cm.

[0009] The raft concrete in S3 adopts impermeable concrete.

[0010] The specific content of S4 is: after the raft slab concrete reaches the compressive strength requirement, the upper fish scale formwork and the lower fish scale formwork are removed; the compressive strength requirement is that the on-site measured compressive strength of the raft slab concrete reaches 30% of the design strength.

[0011] The specific content of S5 is: expansion water stop strips are arranged on both sides of the post-cast strip at the post-cast strip protective layer along the length of the post-cast strip.

[0012] The specific content of S6 is: 45 days after the raft slab concrete is poured, the post-cast joint concrete is poured to complete the construction of the post-cast joint of the reservoir raft slab; the post-cast joint concrete adopts anti-seepage micro-expansion concrete, and the strength grade of the post-cast joint concrete is higher than that of the raft slab concrete.

[0013] The beneficial effects of the present invention are: The construction method of the post-cast strip of the raft slab of a water reservoir provided by the present invention adopts a customized fish-scale steel formwork, which is convenient and quick to install and remove the formwork. At the same time, the bonding surface treatment between the post-cast strip concrete and the water reservoir raft slab concrete is simple and quick, which saves manpower and construction period, and solves the problem of water stop damage easily caused by manual treatment of the concrete bonding layer; "concave" grooves are arranged on the upper and lower sides of the post-cast strip water stop steel plate, and an expansion water stop strip is arranged on the protective layer of the post-cast strip concrete, which effectively improves the anti-seepage effect of the raft slab concrete of the water reservoir. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The present invention is a schematic diagram of template installation for the construction method of the post-casting strip of the raft slab of the water storage tank.

[0015] In the figure, 1. upper wedge-shaped groove, 2. upper fish scale formwork, 3. adjustable top support A, 4. lower wedge-shaped groove, 5. lower fish scale formwork, 6. expansion water stop strip, 7. bracket, 8. raft slab concrete, 9. post-cast strip concrete, 10. adjustable top support B. DETAILED DESCRIPTION

[0016] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0017] Example 1 The construction method of the post-casting strip of the raft slab of the reservoir proposed in this embodiment is as follows: Figure 1 As shown, the following steps are included: S1. Upper wedge-shaped grooves 1 are respectively provided on the upper part of the water-stopping steel plates on both sides at the position of the post-cast belt of the raft slab of the reservoir, and lower wedge-shaped grooves 4 are respectively provided on the lower part of the water-stopping steel plates on both sides; S2, upper fish scale templates 2 are arranged in the upper wedge-shaped grooves 1 on both sides, and a plurality of adjustable top supports A3 and adjustable top supports B10 are arranged between the upper fish scale templates 2 on both sides for support; lower fish scale templates 5 are arranged in the lower wedge-shaped grooves 4 on both sides, and a plurality of brackets 7 are arranged on the lower fish scale templates 5 on both sides for support; S3, pouring raft concrete 8; S4, removing the upper fish scale template 2 and the lower fish scale template 5; S5. Expansion water stop strips 6 are provided on both sides of the post-cast strip at the post-cast strip protective layer; S6, pouring post-casting strip concrete 9, completing the post-casting strip construction of the reservoir raft slab.

[0018] Example 2 The construction method of the post-casting strip of the raft slab of the reservoir proposed in this embodiment is as follows: Figure 1 As shown, the following steps are included: S1. Upper wedge-shaped grooves 1 are respectively provided on the upper part of the water-stopping steel plates on both sides at the position of the post-cast belt of the raft slab of the reservoir, and lower wedge-shaped grooves 4 are respectively provided on the lower part of the water-stopping steel plates on both sides; The upper wedge-shaped groove 1 and the lower wedge-shaped groove 4 on the same side have a common cross-section that is "trapezoidal", the upper wedge-shaped groove 1 and the lower wedge-shaped groove 4 on the same side have a depth of 8cm-10cm, and the upper wedge-shaped groove 1 and the lower wedge-shaped groove 4 on the same side have a total height of 15cm-18cm; S2, upper fish scale templates 2 are arranged in the upper wedge-shaped grooves 1 on both sides, and a plurality of adjustable top supports A3 and adjustable top supports B10 are arranged between the upper fish scale templates 2 on both sides for support; lower fish scale templates 5 are arranged in the lower wedge-shaped grooves 4 on both sides, and a plurality of brackets 7 are arranged on the lower fish scale templates 5 on both sides for support; S3, pouring raft concrete 8; S4, removing the upper fish scale template 2 and the lower fish scale template 5; S5. Expansion water stop strips 6 are provided on both sides of the post-cast strip at the post-cast strip protective layer; S6, pouring post-casting strip concrete 9, completing the post-casting strip construction of the reservoir raft slab.

[0019] Example 3 The construction method of the post-casting strip of the raft slab of the reservoir proposed in this embodiment is as follows: Figure 1 As shown, the following steps are included: S1. Upper wedge-shaped grooves 1 are respectively provided on the upper part of the water-stopping steel plates on both sides at the position of the post-cast belt of the raft slab of the reservoir, and lower wedge-shaped grooves 4 are respectively provided on the lower part of the water-stopping steel plates on both sides; The upper wedge-shaped groove 1 and the lower wedge-shaped groove 4 on the same side have a common cross-section that is "trapezoidal", the upper wedge-shaped groove 1 and the lower wedge-shaped groove 4 on the same side have a depth of 8cm-10cm, and the upper wedge-shaped groove 1 and the lower wedge-shaped groove 4 on the same side have a total height of 15cm-18cm; S2, upper fish scale templates 2 are arranged in the upper wedge-shaped grooves 1 on both sides, and a plurality of adjustable top supports A3 and adjustable top supports B10 are arranged between the upper fish scale templates 2 on both sides for support; lower fish scale templates 5 are arranged in the lower wedge-shaped grooves 4 on both sides, and a plurality of brackets 7 are arranged on the lower fish scale templates 5 on both sides for support; The distance between the adjustable top supports A3 and the adjustable top supports B10 is 45cm-50cm; The cross sections of the plurality of brackets 7 are all in a "human" shape, one end of the plurality of brackets 7 is fixedly connected to the lower fish scale formwork 5, and the other end of the plurality of brackets 7 is fixedly connected to the steel bars at the bottom of the raft slab of the reservoir; The spacing between the several brackets 7 is 45cm-50cm; S3, pouring raft concrete 8; S4, removing the upper fish scale template 2 and the lower fish scale template 5; S5. Expansion water stop strips 6 are provided on both sides of the post-cast strip at the post-cast strip protective layer; S6, pouring post-casting strip concrete 9, completing the post-casting strip construction of the reservoir raft slab.

[0020] Example 4 The construction method of the post-casting strip of the raft slab of the reservoir proposed in this embodiment is as follows: Figure 1 As shown, the following steps are included: S1. Upper wedge-shaped grooves 1 are respectively provided on the upper part of the water-stopping steel plates on both sides at the position of the post-cast belt of the raft slab of the reservoir, and lower wedge-shaped grooves 4 are respectively provided on the lower part of the water-stopping steel plates on both sides; The upper wedge-shaped groove 1 and the lower wedge-shaped groove 4 on the same side have a common cross-section that is "trapezoidal", the upper wedge-shaped groove 1 and the lower wedge-shaped groove 4 on the same side have a depth of 8cm-10cm, and the upper wedge-shaped groove 1 and the lower wedge-shaped groove 4 on the same side have a total height of 15cm-18cm; S2, upper fish scale templates 2 are arranged in the upper wedge-shaped grooves 1 on both sides, and a plurality of adjustable top supports A3 and adjustable top supports B10 are arranged between the upper fish scale templates 2 on both sides for support; lower fish scale templates 5 are arranged in the lower wedge-shaped grooves 4 on both sides, and a plurality of brackets 7 are arranged on the lower fish scale templates 5 on both sides for support; The distance between the adjustable top supports A3 and the adjustable top supports B10 is 45cm-50cm; The cross sections of the plurality of brackets 7 are all in a "human" shape, one end of the plurality of brackets 7 is fixedly connected to the lower fish scale formwork 5, and the other end of the plurality of brackets 7 is fixedly connected to the steel bars at the bottom of the raft slab of the reservoir; The spacing between the several brackets 7 is 45cm-50cm; S3, pouring raft concrete 8; The raft concrete 8 adopts impermeable concrete; S4, removing the upper fish scale template 2 and the lower fish scale template 5; After the raft slab concrete 8 reaches the compressive strength requirement, the upper fish scale formwork 2 and the lower fish scale formwork 5 are removed; the compressive strength requirement is that the on-site measured compressive strength of the raft slab concrete 8 reaches 30% of the design strength; S5. Expansion water stop strips 6 are provided on both sides of the post-cast strip at the post-cast strip protective layer; S6, pouring post-casting strip concrete 9, completing the post-casting strip construction of the reservoir raft slab.

[0021] Example 5 The construction method of the post-casting strip of the raft slab of the reservoir proposed in this embodiment is as follows: Figure 1 As shown, the following steps are included: S1. Upper wedge-shaped grooves 1 are respectively provided on the upper part of the water-stopping steel plates on both sides at the position of the post-cast belt of the raft slab of the reservoir, and lower wedge-shaped grooves 4 are respectively provided on the lower part of the water-stopping steel plates on both sides; The upper wedge-shaped groove 1 and the lower wedge-shaped groove 4 on the same side have a common cross-section that is "trapezoidal", the upper wedge-shaped groove 1 and the lower wedge-shaped groove 4 on the same side have a depth of 8cm-10cm, and the upper wedge-shaped groove 1 and the lower wedge-shaped groove 4 on the same side have a total height of 15cm-18cm; S2, upper fish scale templates 2 are arranged in the upper wedge-shaped grooves 1 on both sides, and a plurality of adjustable top supports A3 and adjustable top supports B10 are arranged between the upper fish scale templates 2 on both sides for support; lower fish scale templates 5 are arranged in the lower wedge-shaped grooves 4 on both sides, and a plurality of brackets 7 are arranged on the lower fish scale templates 5 on both sides for support; The distance between the adjustable top supports A3 and the adjustable top supports B10 is 45cm-50cm; The cross sections of the plurality of brackets 7 are all in a "human" shape, one end of the plurality of brackets 7 is fixedly connected to the lower fish scale formwork 5, and the other end of the plurality of brackets 7 is fixedly connected to the steel bars at the bottom of the raft slab of the reservoir; The spacing between the several brackets 7 is 45cm-50cm; S3, pouring raft concrete 8; The raft concrete 8 adopts impermeable concrete; S4, removing the upper fish scale template 2 and the lower fish scale template 5; The upper fish scale formwork 2 and the lower fish scale formwork 5 are quick to install and remove, and the bonding surface of the raft slab concrete 8 does not need to be roughened in a large area, which can save a lot of labor; After the raft concrete 8 reaches the compressive strength requirement, the upper fish scale formwork 2 and the lower fish scale formwork 5 are removed; the compressive strength requirement is that the on-site measured compressive strength of the raft concrete 8 reaches 30% of the design strength. At this time, when the upper fish scale formwork 2 and the lower fish scale formwork 5 are removed, it can be ensured that the raft concrete 8 components are not deformed and the edges and corners are intact; S5. Expansion water stop strips 6 are provided on both sides of the post-cast strip at the post-cast strip protective layer; The specific content of S5 is: expansion water stop strips 6 are arranged on both sides of the post-cast strip at the post-cast strip protective layer along the length of the post-cast strip; Combined with the upper wedge-shaped groove 1 and the lower wedge-shaped groove 4 set at the water-stop steel plate of the post-cast zone, the anti-seepage effect of the post-cast zone concrete can be effectively guaranteed; S6, pouring post-casting strip concrete 9, completing the post-casting strip construction of the reservoir raft slab; The specific content of S6 is: 45 days after the raft slab concrete 8 is poured, the post-cast joint concrete 9 is poured to complete the construction of the post-cast joint of the reservoir raft slab; the post-cast joint concrete 9 adopts anti-seepage micro-expansion concrete, and the strength grade of the post-cast joint concrete 9 is higher than the strength grade of the raft slab concrete 8.

Claims

1. A method for constructing a post-casting strip of a raft slab in a water storage tank, characterized in that: The following steps are involved: S1. Upper wedge-shaped grooves (1) are respectively provided on the upper parts of the water-stopping steel plates on both sides at the position of the post-cast strip of the raft slab of the water storage tank, and lower wedge-shaped grooves (4) are respectively provided on the lower parts of the water-stopping steel plates on both sides; S2, upper fish scale templates (2) are arranged in the upper wedge-shaped grooves (1) on both sides, and a plurality of adjustable top supports A (3) and adjustable top supports B (10) are arranged between the upper fish scale templates (2) on both sides for support; lower fish scale templates (5) are arranged in the lower wedge-shaped grooves (4) on both sides, and a plurality of brackets (7) are arranged on the lower fish scale templates (5) on both sides for support; S3, pouring raft slab concrete (8); S4, removing the upper fish scale template (2) and the lower fish scale template (5); S5. Expansion water stop strips (6) are provided on both sides of the post-cast strip at the post-cast strip protective layer; S6, pouring the post-casting strip concrete (9), completing the post-casting strip construction of the reservoir raft slab.

2. The method for constructing a post-casting strip of a raft slab in a reservoir according to claim 1, characterized in that: In S1, the upper wedge-shaped groove (1) and the lower wedge-shaped groove (4) on the same side have a common cross-section that is "trapezoidal", the upper wedge-shaped groove (1) and the lower wedge-shaped groove (4) on the same side have a depth of 8 cm-10 cm, and the upper wedge-shaped groove (1) and the lower wedge-shaped groove (4) on the same side have a total height of 15 cm-18 cm.

3. The method for constructing a post-casting strip of a raft slab in a reservoir according to claim 1, characterized in that: The distance between the adjustable top supports A (3) and the adjustable top supports B (10) in S2 is 45 cm to 50 cm.

4. The method for constructing a post-casting strip of a raft slab in a reservoir according to claim 1, characterized in that: The cross-sections of the plurality of brackets (7) in S2 are all in the shape of a "human"; one end of the plurality of brackets (7) is fixedly connected to the lower fish-scale formwork (5); and the other end of the plurality of brackets (7) is fixedly connected to the steel bars at the bottom of the raft slab of the reservoir.

5. The method for constructing a post-casting strip of a raft slab in a reservoir according to claim 1, characterized in that: The spacing between the plurality of brackets (7) in S2 is 45 cm to 50 cm.

6. The method for constructing a post-casting strip of a raft slab in a reservoir according to claim 1, characterized in that: The raft concrete (8) in S3 is made of impermeable concrete.

7. The method for constructing a post-casting strip of a raft slab in a reservoir according to claim 1, characterized in that: The specific content of S4 is: after the raft slab concrete (8) reaches the compressive strength requirement, the upper fish scale formwork (2) and the lower fish scale formwork (5) are removed; the compressive strength requirement is that the on-site measured compressive strength of the raft slab concrete (8) reaches 30% of the design strength.

8. The method for constructing a post-casting strip of a raft slab in a reservoir according to claim 1, characterized in that: The specific content of S5 is: expansion water stop strips (6) are arranged on both sides of the post-cast strip at the post-cast strip protective layer along the length of the post-cast strip.

9. The method for constructing a post-casting strip of a raft slab in a reservoir according to claim 1, characterized in that: The specific content of S6 is: 45 days after the raft slab concrete (8) is poured, the post-casting strip concrete (9) is poured to complete the construction of the post-casting strip of the raft slab of the reservoir; the post-casting strip concrete (9) uses anti-seepage micro-expansion concrete, and the strength grade of the post-casting strip concrete (9) is higher than the strength grade of the raft slab concrete (8).

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