Cushion-free prefabricated concrete module for building foundation engineering

Abstract

The utility model discloses a cushion-layer-free precast concrete module for building foundation engineering, which is directly borne on a foundation and comprises a precast concrete module body and a reinforcement cage integrally arranged in the precast concrete module body, and a conical cavity is prefabricated at the bottom of the precast concrete module body. The side face of the cavity is provided with a grouting hole communicated with the outside of the side face of the body, and the top of the cavity is provided with an exhaust hole communicated with the outside of the top face of the body. The prefabricated parts are adopted to replace cast-in-place, the cushion layer construction step is avoided, the construction quality and efficiency are improved, the construction period is shortened, the material waste is reduced, the environmental influence is reduced, the stability of the construction quality is ensured through factory production, and therefore many defects of a traditional concrete foundation are overcome.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, and in particular to a precast concrete module for building foundation engineering that does not require a subbase. Background Technology

[0002] Traditional concrete foundations require on-site pouring, which takes time to solidify and cure. Furthermore, a concrete leveling layer must be laid first, and subsequent work can only proceed after it has gained strength. This results in a long construction period. Additionally, traditional concrete foundation construction is relatively inefficient, requiring on-site pouring and curing, making it impossible to complete the foundation work quickly. The overall construction process is lengthy and inefficient.

[0003] The production and construction of concrete generate significant amounts of dust and noise, impacting the environment. Furthermore, construction is susceptible to weather conditions; rain and snow can cause delays and reduce efficiency. Therefore, it requires strict environmental control.

[0004] Traditional foundation construction requires a large amount of concrete and formwork, which not only increases costs but also leads to material waste. Furthermore, due to the uncertainties of on-site pouring, quality control in traditional concrete foundation construction is quite difficult. This results in both material waste and challenging quality control.

[0005] Traditional concrete foundations may develop cracks and spalling over time, requiring regular maintenance and repair, which increases maintenance costs. Traditional concrete foundations require a relatively solid subsoil, and additional treatment is needed for weak or uneven subsoil. Utility Model Content

[0006] To address the problems existing in the prior art, this utility model provides a precast concrete module for building foundation engineering that does not require a subbase, solving the problems of long construction cycle, low construction efficiency, high environmental requirements, serious material waste, and difficulty in controlling construction quality in traditional concrete foundations.

[0007] This utility model is implemented as follows: a precast concrete module for building foundation engineering without a subbase, the precast concrete module is directly supported on the foundation, including the body of the precast concrete module and an integrally arranged steel reinforcement skeleton located inside the body, a conical cavity is precast at the bottom of the body, grouting holes communicating with the outside of the body are provided on the side of the cavity, and venting holes communicating with the outside of the top surface of the body are provided at the top of the cavity.

[0008] The area of ​​the bottom of the conical cavity accounts for at least 70% of the bottom area of ​​the entire precast concrete module, and the height of the conical cavity is controlled by the slope, which is set to 30 degrees.

[0009] The lower part of the outer wall of the precast concrete module forms an enlarged ring to improve the stability of the foundation structure, and the top surface of the enlarged ring slopes downward to form a slope.

[0010] The grouting hole is located on the side of the enlarged head.

[0011] The body and the enlarged head are rectangular in shape.

[0012] The advantages and technical effects of this utility model are as follows: by using precast components to replace on-site casting, the subbase construction steps are avoided, the construction quality and efficiency are improved, the construction cycle is shortened, material waste is reduced, environmental impact is reduced, and the stability of construction quality is ensured through factory production, thereby overcoming many defects of traditional concrete foundations. Attached Figure Description

[0013] Figure 1 This is a structural diagram of the precast concrete module without a subfloor used in building foundation engineering according to this utility model.

[0014] Figure 2 yes Figure 1 Structural cross-section diagram. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model.

[0016] In the description of this utility model, it should be noted that the terms "upper", "middle", "lower", "inner", "outer", "both sides", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0017] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0018] like Figure 1 , 2As shown, the present invention relates to a precast concrete module for building foundation engineering that does not require a subbase. The precast concrete module is directly supported on the foundation. The module is characterized by including a body 4 of the precast concrete module and an integrally arranged steel reinforcement skeleton 2 located inside the body. A conical cavity 5 is precast at the bottom of the body 4. A grouting hole 3 communicating with the outside of the body side is provided on the side of the cavity. An exhaust hole 1 communicating with the outside of the top surface of the body is provided at the top of the cavity 5.

[0019] The area of ​​the bottom of the conical cavity 5 accounts for at least 70% of the bottom area of ​​the entire precast concrete module. The height of the conical cavity is controlled by the slope, which is set to 30 degrees.

[0020] The lower part of the outer wall of the precast concrete module body 4 forms an annular enlarged head 6 to improve the stability of the foundation structure. The top surface of the enlarged head 6 slopes downward to form a slope 7. The grouting hole 3 is located on the side of the enlarged head 6.

[0021] Preferably, the body 4 and the enlarged head 6 are rectangular parallelepipeds.

[0022] Specifically, this invention prefabricates a conical cavity at the bottom of the foundation. The cavity has grouting holes on its sides and venting holes at the top. A reinforced steel frame is arranged throughout the cavity, and the enlarged head enhances the stability of the foundation structure. The area of ​​the cone's bottom accounts for 70% of the total foundation bottom area, ensuring that the grouting material can evenly fill the cavity and strengthen the bond between the foundation and the ground. The height of the conical cavity is controlled by its slope, set at 30 degrees, to ensure smooth flow of the grouting material during injection. Simultaneously, the venting holes effectively release gas from the cavity, preventing air bubbles from accumulating and affecting grouting quality. A slope that is too small will result in slow grouting material flow and poor venting; while a slope that is too large may lead to uneven distribution of the grouting material or even localized voids. Therefore, the 30-degree slope design achieves the optimal balance between grouting effect and venting efficiency. It also effectively distributes the load and enhances the bearing capacity of the foundation, making it particularly suitable for construction environments with weak or uneven foundations. The grouting holes are used to inject grouting material into the cavity during foundation installation, ensuring a tight bond between the foundation structure and the ground, and enhancing the overall strength and stability of the foundation. Vent holes help release excess gas during grouting, preventing air bubbles from accumulating and affecting the grouting effect, thus ensuring uniform grouting and improving the quality of the foundation structure. Supported by the internal steel reinforcement cage, the foundation maintains its structural integrity under ground loads. This is especially important in uneven or weak ground conditions, where the steel reinforcement cage effectively prevents structural deformation caused by uneven ground settlement, ensuring the long-term stability of the foundation. The extended platform (enlarged head) actually avoids honeycomb-like pitting by changing the shape of the structure. This extended conical design effectively guides the flow direction of concrete during pouring, reducing air bubbles and voids caused by uneven gravity or improper pouring, thereby improving the density and surface quality of the concrete. Furthermore, no concrete bedding layer is needed during operation. After the foundation is compacted and leveled, the precast foundation is placed, leveled with shims, and then grouting is performed. Therefore, the bedding layer process and strength waiting time are reduced, saving time and costs.

[0023] This invention utilizes a foundation structure constructed from precast concrete components. No additional concrete subfloor is required on-site, thus improving construction efficiency, reducing costs, and ensuring the stability and safety of the foundation structure.

[0024] like Figure 1 As shown, multiple precast concrete modules are prefabricated in the factory and customized according to the specific requirements of the construction site. The size, shape, reinforcement, and structural design of each module are determined according to the specific project needs to ensure that it has sufficient load-bearing capacity and compressive strength. Secondly, the precast concrete foundation structure without a subbase is constructed as a whole through on-site construction and then transported to the construction site for workers to assemble the precast components into a whole.

[0025] After the components are transported to the construction site, there is no need to pour a concrete foundation layer during operation. After the foundation is compacted and leveled, the precast foundation modules are placed down, leveled with shims, and then grouting is carried out. At the same time, the structural dimensions are precisely calculated and designed to ensure the stability of the precast components on the foundation and avoid local damage caused by uneven settlement of the foundation.

[0026] This invention achieves a breakthrough in foundation-free construction by prefabricating a conical cavity at the bottom of the foundation and designing grouting and venting holes. It eliminates the need for a foundation pad in traditional foundation structures, directly using precast concrete modules as foundation supports, thus simplifying the construction process and reducing design complexity, significantly improving construction efficiency. The steel reinforcement skeleton inside the foundation is produced modularly, allowing for standardized production of each precast component in the factory. This not only ensures the consistency and quality of each component but also significantly reduces production costs. Through standardized and factory-based production, this invention not only improves production efficiency but also reduces construction delays caused by adverse weather conditions, making construction more reliable and stable. Furthermore, factory production ensures that construction is unaffected by weather conditions, avoiding delays due to damp weather or harsh environments. The application of this structure also significantly reduces environmental damage, minimizing pollution and resource waste during construction. In summary, these advantages not only improve construction speed and safety but also ensure the long-term stability and sustainability of the project, providing a more efficient, economical, and environmentally friendly solution for the foundation construction field.

[0027] The above description aims to elucidate the basic principles, main features, and advantages of the novel precast concrete foundation structure without a subbase. These embodiments and descriptions in the specification are only for illustrating the principles of this patent. Without departing from the core spirit and scope of this utility model, the novel precast concrete foundation structure without a subbase can have various variations and improvements, all of which should be within the protection scope of this utility model.

Claims

1. A precast concrete module for building foundation engineering without a subbase, wherein the precast concrete module is directly supported on the foundation, characterized in that, The body (4) includes a precast concrete module and an integrally arranged steel reinforcement skeleton (2) located inside the body. A conical cavity (5) is precast at the bottom of the body (4). A grouting hole (3) communicating with the outside of the side of the body is provided on the side of the cavity. An exhaust hole (1) communicating with the outside of the top surface of the body is provided at the top of the cavity (5).

2. The precast concrete module for building foundation engineering without a subbase as described in claim 1, characterized in that, The area of ​​the bottom of the conical cavity (5) accounts for at least 70% of the bottom area of ​​the entire precast concrete module. The height of the conical cavity is controlled by the slope, which is set to 30 degrees.

3. The precast concrete module for building foundation engineering without a subbase as described in claim 1, characterized in that, The lower part of the outer wall of the precast concrete module (4) forms an enlarged ring (6) to improve the stability of the foundation structure, and the top surface of the enlarged ring (6) slopes downward to form a slope (7).

4. The precast concrete module for building foundation engineering without a subbase as described in claim 3, characterized in that, The grouting hole (3) is located on the side of the enlarged head (6).

5. The precast concrete module for building foundation engineering without a subbase as described in claim 1, characterized in that, The body (4) and the enlarged head (6) are rectangular in shape.

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