CN204238264U - A kind of sole plate post-poured strip structure - Google Patents

Abstract

The utility model relates to a post-pouring belt structure of a foundation bottom plate, which is composed of a foundation bottom plate, a concrete cushion, a pre-embedded screw, a prefabricated closing plate, a slab rib, waterproof concrete, a post-pouring belt concrete, water-swellable rubber, a bottom plate decoration layer, etc. ; The concrete on both sides of the post-casting belt is set in a stepped shape; the screw is embedded on the steps on the lower surface of the prefabricated closed slab; the post-casting belt is provided with waterproof concrete, post-cast concrete, prefabricated closed slab, and bottom plate decorative layer in sequence from bottom to top Water-swellable rubber is provided on both sides of the prefabricated closed plate; the base plate and the upper surface of the prefabricated closed plate are provided with a bottom plate decorative layer. The utility model relates to a structure that can effectively protect the corrosion of steel bars protruding from both sides, prevent sundries and construction waste from falling into the groove of the post-casting belt, and the construction of the next process can be carried out immediately after the concrete of the post-casting belt is poured, and at the same time it has good Waterproof effect.

Description

A post-cast strip structure for the foundation base plate

technical field

The utility model relates to a post-pouring strip structure of a foundation bottom plate, which belongs to the technical field of building construction structures.

Background technique

With the development of high-rise buildings in the direction of large-scale volume and diversified structural functions, super-long (that is, exceeding the maximum distance between expansion joints of reinforced concrete structures), structures of main building podiums, or structures with irregular shapes continue to appear, especially for underground buildings. For buildings with waterproof requirements, no deformation joints are required in the structure, and post-construction pouring joints (ie post-pouring belts) are often used to replace them. All underground buildings are equipped with settlement or telescopic post-casting belts according to the requirements of the design code. As the post-cast belt is widely used in projects, the construction quality of the post-cast belt directly affects the quality of the main project.

The traditional base plate post-cast belt structure (application number: 201120202782.9) consists of a cushion layer, a post-cast belt reinforcement layer, a waterproof layer, a waterproof protection layer and a concrete structure layer from bottom to top, wherein the post-cast belt reinforcement layer is formed along the rear The integrated structure formed by the steel plates laid in the length direction of the pouring belt replaces the original reinforced concrete structure, which reduces the amount of work and labor; after the cushion construction is completed, it is only necessary to place the steel plates according to the designed position, which is convenient for construction and can greatly reduce labor. Reduce workload, improve work efficiency and reduce construction time. This structural form has the following disadvantages: (1) The post-cast belt is always open during the construction process, and construction waste is easy to enter the post-cast belt, which has a certain adverse effect on the construction quality, strength and durability of the post-cast belt structure. The exposed steel bars in the pouring belt are easily corroded; (2) water seepage channels are likely to be formed on both sides of the post-casting belt, which affects the service life of the structure.

Utility model content

The purpose of the utility model is to overcome the deficiencies in the prior art and provide a waterproof structure that can effectively protect the steel bars protruding from both sides of the post-casting belt, avoid corrosion of the steel bars, effectively prevent construction waste from falling into the post-casting belt.

This post-cast belt structure of the foundation bottom plate includes foundation bottom plate, concrete cushion, pre-embedded screw, prefabricated closed plate, slab ribs, waterproof concrete, post-cast concrete, water-swellable rubber and bottom plate decorative layer; Waterproof concrete, post-cast concrete, prefabricated closed slab, and bottom plate decoration layer are arranged in sequence on the top; the two sides of the post-cast concrete are set in a step shape; the prefabricated closed slab and the foundation The bottom plate is fixed with screws; the two sides of the prefabricated closing plate are provided with water-swellable rubber;

As a preference: the concrete on both sides of the post-pouring belt is arranged in a step shape, and the upper and lower transverse reinforcements protrude from the side, and are respectively welded together with the transverse reinforcements on the other side of the step.

As a preference: the prefabricated closed slab is made of prefabricated reinforced concrete slab or steel plate, screw holes are reserved on the prefabricated closed slab, the lower surface of the prefabricated closed slab is provided with plate ribs, and the top of the prefabricated closed slab is at the same level as the upper surface of the base plate.

As a preference: the post-cast strip concrete and the base plate adopt the same grade of concrete.

The utility model has the following characteristics and beneficial effects:

1. The post-cast strip structure of the foundation floor involved in the utility model can effectively protect the transverse steel bars protruding from both sides of the post-cast strip to avoid corrosion of the steel bars.

2. The setting of prefabricated closed slabs can keep the interior of the post-casting belt clean, and prevent debris and construction waste from entering the groove of the post-casting belt, thereby improving the construction quality and durability of the structure. At the same time, after the concrete pouring of the post-casting belt is completed , The construction of the next process can be carried out immediately, which effectively shortens the construction period.

3. Water-swellable rubber is installed around the prefabricated reinforced concrete cover plate and at the fixed connection with the screw, which can effectively improve the waterproof effect of the structure.

4. Waterproof concrete is set at the bottom of the post-casting belt, which can enhance the waterproof effect of the post-casting belt structure and avoid the adverse effects of groundwater at the bottom of the foundation on the foundation.

To sum up, the post-pouring belt structure of the base plate can effectively protect the exposed main ribs of the bottom plate in the post-casting belt, and at the same time prevent debris and construction waste from entering the post-casting belt, which can improve the construction quality of the post-casting belt structure. The role of strength and durability, while having a good waterproof performance.

Description of drawings

Fig. 1 is a schematic diagram of the structure before pouring waterproof concrete of a foundation base plate of the present invention;

Fig. 2 is a structural schematic diagram of a base plate post-casting belt of the utility model.

Explanation of reference signs: base plate 1; concrete cushion 2; embedded screw 3; fastening nut 4; transverse reinforcement 5; longitudinal reinforcement 6; prefabricated closed plate 7; welded joint 8; water-swellable rubber 9; 10; post-pouring concrete 11; floor decoration layer 12; plate rib 13; post-pouring groove 14.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is described further. Although the utility model will be described in conjunction with preferred embodiments, it should be understood that it does not mean that the utility model is limited to the embodiments. On the contrary, the invention is to cover alternatives, modifications and equivalents, which may be included within the scope of the invention as defined by the appended claims.

The production process, transportation and pouring methods of concrete, etc. will not be described repeatedly in this embodiment, and the embodiment of the structure related to the present utility model will be explained emphatically.

Fig. 1 is a schematic diagram of the structure of the post-pouring belt of the foundation floor of the present invention before pouring waterproof concrete; Fig. 2 is a schematic diagram of the structure of the post-casting strip of the foundation floor of the present invention, referring to the post-casting of a foundation floor shown in Fig. 1 and Fig. 2 The cast belt structure mainly includes: foundation base plate 1, concrete cushion 2, pre-embedded screw rod 3, prefabricated closed plate 7, water-swellable rubber 9, waterproof concrete 10, post-cast concrete 11, base plate decorative layer 12, plate rib 13. The thickness of the base plate 1 is 650 mm, the thickness of the concrete cushion 2 is 200 mm, and the widths of the three steps with grooves 14 after casting are 100 mm, 15 mm, and 20 mm respectively.

The post-cast belt is provided with waterproof concrete 10, post-cast concrete 11, prefabricated closing plate 7, and bottom plate decoration layer 12 sequentially from bottom to top. The strength grade of the waterproof concrete 10 is C30, the maximum particle size of the stone is 5-31.5mm, and 6%-8% of YEA-H composite expansion agent is mixed.

The post-cast strip concrete 10 and the base plate 1 are made of No. 42.5 ordinary Portland cement, and the concrete strength grade is C30. The prefabricated closing plate 7 is made of a steel plate with a thickness of 20 mm and a width of 400 mm. The upper surface of the prefabricated closing plate 7 is on the same level as the upper surface of the foundation base plate 1 . The plate rib 13 adopts a steel plate, and the plate rib 13 is 10mm thick and 20mm wide, and one is set every 50mm.

The construction process is as follows: during construction, the concrete cushion 2 is poured first, and the foundation floor 1 is constructed after the strength requirements are met. After the initial setting of the concrete, lay a layer of prefabricated closing plate 7 on it, and fix it on the pre-embedded screw 3. The prefabricated closing plate 7 adopts a steel plate with plate ribs 13; , remove the prefabricated closing plate 7, weld the transverse reinforcement 5 in the post-casting belt; pour waterproof concrete 10 in the bottom of the back-casting belt, pour the post-casting concrete 11 on the upper part of the waterproof concrete 10, post-casting the concrete 11 and the base plates on both sides 1 Use the same grade of concrete; after the initial setting of the concrete, the prefabricated closing plate 7 can be laid immediately, and fixedly connected with the foundation base plate 1 through the embedded screw 3, wherein the two sides of the prefabricated closing plate 7 and the fixed connection of the pre-embedded screw 3 are painted with Water-swellable rubber9.

Claims (4)

1. a post-pouring belt structure of foundation base plate, is characterized in that: comprise base base plate (1), concrete pad (2), pre-embedded screw rod (3), prefabricated closed plate (7), slab rib (13), waterproof Concrete (10), post-cast concrete (11), water-swellable rubber (9) and bottom plate decoration layer (12); the post-cast belt is provided with waterproof concrete (10), post-cast concrete (11) from bottom to top ), a prefabricated closing plate (7), a base plate decorative layer (12); the two sides of the post-cast concrete (11) are set in a step shape; the prefabricated closing plate ( 7) The screw (3) fixed to the base plate (1); water-swellable rubber (9) is provided on both sides of the prefabricated closing plate (7); the base plate (1) and the upper surface of the prefabricated closing plate (7) are provided with a bottom plate Decorative layer (12). 2. foundation bottom plate post-pouring belt structure according to claim 1, is characterized in that: described post-pouring belt both sides concrete is set to step shape, and the horizontal steel bar up and down stretches out side, and respectively with the transverse direction of step other side The bars are welded together. 3. foundation bottom plate post-cast belt structure according to claim 1, it is characterized in that: described prefabricated closing plate (7) adopts prefabricated reinforced concrete slab or steel plate, reserves screw through hole on the prefabricated closing plate (7), prefabricated The lower surface of the closing plate (7) is provided with plate ribs (13), and the top of the prefabricated closing plate (7) is at the same level as the upper surface of the base plate (1). 4. foundation bottom plate post-cast belt structure according to claim 1, is characterized in that: described post-cast belt concrete (11) and foundation bottom plate (1) adopt the concrete of same label.