Construction method for preventing slurry leakage at raft construction joint steel bar protection layer

Abstract

The invention discloses a construction method for preventing slurry leakage at a raft construction joint reinforcement protective layer. The construction method comprises the steps of determining the position of a construction joint, erecting a formwork and pouring a concrete blocking table, binding a raft reinforcement mesh, arranging a dense-mesh steel wire mesh and a water stop steel plate at the position of the construction joint, pouring raft concrete and chiseling concrete overflowing from the position of the construction joint. Compared with the prior art, the concrete blocking table is arranged at the position of the construction joint, the problem of slurry leakage during raft pouring is solved, the tightness of the construction joint can be effectively improved, it is ensured that the dense-mesh steel wire mesh is firmly connected with the peripheral structure, and therefore concrete slurry leakage is effectively prevented, and even if slurry leakage occurs, the slurry leakage amount is only extremely small. Meanwhile, due to the fact that the slurry leakage phenomenon is effectively controlled, the later-period concrete chiseling workload can be greatly reduced, waste caused by excessive use of concrete is avoided, the construction method is easy to operate, the needed cost is low, and the construction cost is further reduced while the construction efficiency is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to raft construction technology field, especially to a kind of raft construction joint steel protection layer place prevents slurry leakage construction method. BACKGROUND

[0002] In the process of garage raft construction, the height of the bottom protection layer of the steel raft is 5cm, and the concrete interception at the construction joint is the key link to ensure the quality of the structure. Currently, dense mesh steel wire net or quick easy closing net is mainly used.

[0003] However, these two interception methods have certain limitations in practical application. Although the dense mesh steel wire net has certain interception ability, due to the obstruction of the lower layer of steel raft, part of the cement slurry will overflow from the bottom protection layer of the raft during concrete pouring, especially when the concrete slump is large, the slurry leakage phenomenon is more obvious. As a new type of interception material, although the quick easy closing net is better than the ordinary steel wire net in rigidity and interception effect, it is affected by the steel binding precision in the construction process, the flatness of the bottom of the raft and the installation and fixing method of the closing net, and it is easy to have gaps between the steel and the base, which may also cause slurry leakage.

[0004] Concrete slurry leakage at the construction joint not only causes material waste, but also affects the concrete bonding quality at the construction joint. Slurry leakage will cause defects such as honeycomb and pitted surface at the construction joint, reduce the integrity and durability of the structure, and also have adverse effects on the physical properties of concrete, weakening the reliability of the structure. SUMMARY

[0005] In order to solve the above technical problems, the present application provides a construction method for preventing slurry leakage at the steel protection layer of the construction joint of the raft, which sets a concrete retaining platform at the construction joint of the bottom steel protection layer of the raft to reduce the slurry leakage problem during raft pouring, reduce concrete waste to improve economic benefits, and reduce post-construction chiseling to improve construction efficiency and reduce construction cost.

[0006] To achieve this technical purpose, the present application adopts the following scheme: The present application provides a construction method for preventing slurry leakage at the steel protection layer of the construction joint of the raft, which comprises the following steps: S1, after the completion of the cushion construction, line positioning is carried out on the cushion to determine the position of the construction joint; S2, a formwork is erected at the position of the construction joint and a concrete retaining platform is poured; S3, the bottom layer of steel mesh and the surface layer of steel mesh of the raft are bound; S4, a dense mesh steel wire net is arranged at the position of the construction joint, the top of the dense mesh steel wire net is fixedly connected with the surface layer of steel mesh, and the bottom of the dense mesh steel wire net is fixedly connected with the bottom layer of steel mesh; S5, pouring the concrete of the raft; S6. After construction is completed, inspect and remove any excess concrete that has overflowed from the construction joints.

[0007] Furthermore, the concrete retaining platform is 5cm high, 5cm wide, and the same length as the raft slab.

[0008] Furthermore, protective spacers are installed between the bottom reinforcing mesh and the foundation layer. These spacers are used to fix the position of the reinforcing bars, prevent exposed reinforcing bars from corroding, and ensure the durability of the structure.

[0009] Furthermore, the fine-mesh wire mesh is 200 mesh, but other sizes can also be selected according to construction needs.

[0010] Furthermore, the bottom of the dense wire mesh rests against the concrete retaining wall.

[0011] Furthermore, a water-stop steel plate is installed at the construction joint. The water-stop steel plate has a concave structure and is horizontally installed at half the height of the construction joint, with its grooved surface facing the top surface of the raft slab.

[0012] Furthermore, the concrete used for pouring the concrete retaining wall is of the same grade as the concrete used for pouring the raft slab.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention involves installing a concrete retaining wall at the construction joint to reduce grout leakage during raft foundation pouring. This effectively improves the tightness of the construction joint area, ensuring a firm connection between the dense wire mesh and the surrounding structure, thus effectively preventing concrete leakage. Even if leakage occurs, it is minimal. Furthermore, because leakage is effectively controlled, the amount of subsequent concrete removal work is greatly reduced, avoiding waste caused by excessive concrete use. This construction method is simple to operate and requires low costs, further reducing construction costs while ensuring construction efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a construction method for preventing grout leakage at the reinforcement protective layer of the raft slab construction joint in an embodiment of the present invention.

[0015] The markings in the diagram are: 1. Subbase; 2. Raft foundation; 21. Bottom layer steel mesh; 22. Top layer steel mesh; 3. Protective layer spacer; 4. Concrete retaining wall; 5. Dense wire mesh; 6. Waterstop steel plate. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments.

[0017] Please see Figure 1The application provides a construction method for preventing slurry leakage at a raft construction joint steel protection layer, comprising the following steps: S1, after the cushion layer 1 is constructed, the position of the construction joint is determined by positioning on the cushion layer 1; S2, a concrete block 4 is poured and supported at the position of the construction joint; the concrete block 4 has a height of 5 cm, a width of 5 cm and a length same as the raft 2; S3, the bottom steel bar net 21 and the surface steel bar net 22 of the raft 2 are bound, and the protection layer cushion block 3 is arranged between the bottom steel bar net 21 and the cushion layer 1, so as to fix the position of the steel bar, prevent the steel bar from being exposed and corroded and ensure the durability of the structure; S4, a dense mesh steel wire net 5 is arranged at the position of the construction joint, the dense mesh steel wire net 5 has 200 meshes, and other sizes can also be selected according to the construction requirement; the top of the dense mesh steel wire net 5 is fixedly connected with the surface steel bar net 22, the bottom of the dense mesh steel wire net 5 is fixedly connected with the bottom steel bar net 21, and the bottom of the dense mesh steel wire net 5 abuts against the concrete block 4; S5, the raft 2 concrete is poured; S6, after the construction is completed, the overflowed concrete at the construction joint is checked and chiseled.

[0018] In an embodiment, a water stop steel plate 6 is arranged at the position of the construction joint, the water stop steel plate 6 has a concave structure, is arranged horizontally at the position of half the height of the construction joint and has a groove facing the top surface of the raft 2.

[0019] In an embodiment, the concrete poured for the concrete block 4 and the concrete poured for the raft 2 have the same mark.

[0020] The construction method of the application provides effective protection for the concrete pouring construction at the construction joint by arranging the dense mesh steel wire net 5 and the concrete block 4, reduces the excessive amount of concrete, effectively controls the slurry leakage, greatly reduces the workload of the concrete chiseling in the later stage, avoids the waste caused by the excessive use of concrete, and has simple operation and low cost, so that the construction efficiency is ensured and the construction cost is further reduced.

[0021] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the application, rather than limit them; although the application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: the technical solutions recorded in the foregoing embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; if these modifications and changes belong to the scope of the claims of the application and the equivalent technology, they should be considered as the protection scope of the application.

Claims

1. A construction method for preventing slurry leakage at a raft construction joint reinforcement cover layer, characterized by, The method comprises the following steps: S1, after the construction of the cushion layer (1) is completed, the line is laid and positioned on the cushion layer (1) to determine the position of the construction joint; S2, the formwork is erected at the position of the construction joint and the concrete retaining platform (4) is poured; S3, the bottom steel bar mesh (21) and the surface steel bar mesh (22) of the raft (2) are bound; S4, the dense mesh steel wire mesh (5) is arranged at the position of the construction joint, the top of the dense mesh steel wire mesh (5) is fixedly connected with the surface steel bar mesh (22), and the bottom of the dense mesh steel wire mesh (5) is fixedly connected with the bottom steel bar mesh (21); S5, the raft (2) concrete is poured; S6, after the construction is completed, the overflowed concrete at the construction joint is checked and chipped.

2. The construction method for preventing slurry leakage at the raft construction joint reinforcement cover layer place according to claim 1, characterized in that, The concrete retaining platform (4) has a height of 5 cm, a width of 5 cm, and a length same as that of the raft (2).

3. The method of claim 1, wherein the method further comprises: The bottom steel bar mesh (21) is provided with a protective layer cushion block (3) between the cushion layer (1).

4. The method of claim 1, wherein the method further comprises: The dense mesh steel wire mesh (5) is 200 mesh.

5. The method of claim 1, wherein the method further comprises: The bottom of the dense mesh steel wire mesh (5) abuts against the concrete retaining platform (4).

6. The method of claim 1, wherein the method further comprises: The water stop steel plate (6) is arranged at the position of the construction joint, the water stop steel plate (6) has a concave structure, is arranged horizontally at the position of half the height of the construction joint, and the groove faces the top surface of the raft (2).

7. The method of claim 1, wherein the method further comprises: The concrete for pouring the concrete retaining platform (4) and the concrete for pouring the raft (2) are of the same grade.

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