A monolithic foundation structure for reinforced concrete drainage pipes

Abstract

The application discloses a whole foundation structure for reinforced concrete drainage pipeline. A plurality of concrete prefabricated cushion blocks are arranged in a trench along the laying direction of the drainage pipeline; wherein, two outer sides of the drainage pipeline are provided with a formwork for defining the cross-sectional shape of the cast-in-place concrete foundation; the cast-in-place concrete foundation is a one-time casted integral structure, which is filled between the formwork and wraps the bottom and the lower part of the two sides of the drainage pipeline upwards, so as to wrap and consolidate the lower part of the drainage pipeline and all the concrete prefabricated cushion blocks inside, forming a whole pipe base foundation. Therefore, the application avoids the installation gap between the drainage pipeline and the cast-in-place concrete foundation and the weak link of the "cold joint" formed by the secondary caulking, realizes the high-strength wrapping and the true integration of the drainage pipeline and the cast-in-place concrete foundation, so as to not only simplify the process, improve the construction efficiency, but also enhance the integrity, impermeability and long-term durability of the structure.

Description

Technical Field

[0001] This application relates to the field of municipal engineering facilities technology, and in particular to an integral foundation structure for reinforced concrete drainage pipes. Background Technology

[0002] In the laying of drainage pipelines in municipal engineering, the core process steps of conventional construction methods are as follows: First, pour the pipeline foundation concrete on the prepared trench foundation, and manually smooth the top surface to form a supporting curved surface that matches the curvature of the outer wall of the pipeline; then, hoist the drainage pipeline and place it on the hardened curved foundation; finally, since there will inevitably be an installation gap between the precast pipeline and the on-site smoothed concrete foundation curved surface, secondary grouting or sealing treatment must be carried out to fill the gap.

[0003] However, existing methods have some inherent drawbacks. Firstly, the interface bonding quality between the pipe and the foundation is poor. The precision of manually formed curved surfaces is limited, making it difficult to ensure complete adhesion to the pipe's outer wall, resulting in insufficient actual bond strength and hindering the formation of an ideal integrated load-bearing structure between the pipe and the foundation. Secondly, the construction process is cumbersome and inefficient. This method divides foundation construction into multiple independent processes such as "foundation pouring → pipe installation → secondary grouting," which not only creates an incoherent workflow but also requires secondary treatment, increasing labor and time costs and impacting construction efficiency. Utility Model Content

[0004] This application provides a foundation structure for a reinforced concrete drainage pipe, which solves the problems mentioned in the background art.

[0005] This application provides an integral foundation structure for reinforced concrete drainage pipes, including a cast-in-place concrete foundation set in the trench, and further including: multiple precast concrete pads, which are laid at intervals along the laying direction of the drainage pipe on the bottom wall of the trench to support the drainage pipe; wherein, templates are provided on both outer sides of the drainage pipe to define the cross-sectional shape of the cast-in-place concrete foundation; the cast-in-place concrete foundation is an integral structure cast in one go, which fills the space between the templates and wraps around the bottom and lower sides of the drainage pipe, thereby wrapping and fixing the lower part of the drainage pipe and all the precast concrete pads inside, forming an integral pipe base foundation.

[0006] In one possible implementation, the precast concrete pad has a steel mesh embedded inside.

[0007] In one possible implementation, the concrete strength grade of the precast concrete pad is not lower than that of the cast-in-place concrete foundation.

[0008] In one possible implementation, the bottom wall of the trench is provided with a positioning groove; the bottom of the precast concrete pad is provided with a positioning protrusion that matches the positioning groove.

[0009] In one possible implementation, the upper surface of the precast concrete pad has an arc-shaped support surface that matches the curvature of the outer wall of the drainage pipe.

[0010] In one possible implementation, the template includes a vertical plate, a horizontal plate, and a diagonal bracing plate; the vertical plate is vertically disposed on the bottom wall of the trench and located outside the drainage pipe; one end of the horizontal plate is connected to the side wall of the trench, and the other end is connected to the side of the vertical plate; the diagonal bracing plate is inclined, with its two ends respectively connected to the side wall of the trench and the side of the vertical plate, and the diagonal bracing plate is located above the horizontal plate.

[0011] In one possible implementation, the angle of the cast-in-place concrete foundation enclosing the outer wall of the drainage pipe is between 90° and 135°.

[0012] One or more technical solutions provided in the embodiments of this application have at least the following technical effects: This application provides an integrated foundation structure for reinforced concrete drainage pipes. The construction process is as follows: During drainage pipe installation, multiple precast concrete blocks are first laid at designed intervals on the prepared trench bottom wall. The drainage pipe is then hoisted and placed onto the precast concrete blocks. Subsequently, templates are installed on both sides of the drainage pipe, defining the cross-sectional shape of the cast-in-place concrete foundation. Finally, concrete is poured in one go inside the templates to form the cast-in-place concrete foundation. The poured concrete fully fills the lower part and sides of the drainage pipe, as well as all gaps between the drainage pipe and the precast concrete blocks. After the concrete hardens, it tightly integrates with the lower part of the drainage pipe and all the precast concrete blocks, forming a complete "foundation-pipe" composite load-bearing structure. Therefore, this application, through an integrated casting process, successfully avoids the installation gaps between the pipe and the foundation, as well as the weak points such as "cold joints" caused by secondary grouting in traditional methods. This solution not only simplifies the construction process and greatly improves efficiency, but more importantly, it achieves a high-strength bond between the pipes and the foundation and integrated synergistic stress distribution, significantly enhancing the overall integrity, impermeability, and long-term durability of the structure. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments of this application will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 A structural schematic diagram of an integral foundation structure for reinforced concrete drainage pipes provided in an embodiment of this application; Figure 2 This is a schematic diagram of the template provided in the embodiments of this application; Figure 3 This is a structural schematic diagram of the precast concrete pad provided in the embodiments of this application.

[0015] Icons: 1-Trench; 2-Cast-in-place concrete foundation; 3-Precast concrete pad; 31-Positioning protrusion; 32-Curved support surface; 4-Drainage pipe; 5-Formwork; 51-Vertical plate; 52-Horizontal plate; 53-Diagonal bracing plate. Detailed Implementation

[0016] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0017] In the description of the embodiments of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the embodiments of this application and for simplifying the description, 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 application. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0018] The various embodiments in this specification are described in a progressive manner. For the same or similar parts between the various embodiments, please refer to each other. Each embodiment focuses on describing the differences from other embodiments.

[0019] This application provides an embodiment of an integral foundation structure for reinforced concrete drainage pipes, such as... Figures 1 to 3As shown, the integral foundation structure for reinforced concrete drainage pipes includes a cast-in-place concrete foundation 2 set in a trench 1, and multiple precast concrete blocks 3 laid at intervals along the laying direction of the drainage pipe 4 on the bottom wall of the trench 1 to support the drainage pipe 4. Templates 5 are provided on both outer sides of the drainage pipe 4 to define the cross-sectional shape of the cast-in-place concrete foundation 2. The cast-in-place concrete foundation 2 is an integral structure cast in one piece, filling the spaces between the templates 5 and wrapping upwards around the bottom and lower sides of the drainage pipe 4, thereby enclosing and securing the lower part of the drainage pipe 4 and all the precast concrete blocks 3 inside, forming an integral pipe base foundation.

[0020] It should be noted that the construction process of this structure is as follows: When laying the drainage pipe 4, firstly, multiple precast concrete blocks 3 are laid on the bottom wall of the prepared trench 1 according to the designed spacing. The drainage pipe 4 is then hoisted and placed on the precast concrete blocks 3. Subsequently, templates 5 are installed on both sides of the drainage pipe 4. These templates 5 define the cross-sectional shape of the cast-in-place concrete foundation 2. Finally, concrete is poured in one go inside the templates 5 to form the cast-in-place concrete foundation 2. The poured concrete fully fills the lower part and sides of the drainage pipe 4, as well as all gaps between the drainage pipe 4 and the precast concrete blocks 3. After the concrete hardens, it tightly integrates with the lower part of the drainage pipe 4 and all the precast concrete blocks 3, forming a complete "foundation-pipe" composite load-bearing structure. Therefore, this application, through an integrated casting process, successfully avoids the weak links such as the installation gap between the pipe and the foundation and the "cold joint" caused by secondary grouting in traditional methods. This solution not only simplifies the construction process and greatly improves efficiency, but more importantly, it achieves a high-strength bond between the pipes and the foundation and integrated synergistic stress distribution, significantly enhancing the overall integrity, impermeability, and long-term durability of the structure.

[0021] Furthermore, the angle of the cast-in-place concrete foundation 2 enclosing the outer wall of the drainage pipe 4 is between 90° and 135°.

[0022] In this embodiment, the concrete strength grade of the precast concrete pad 3 is not lower than that of the cast-in-place concrete foundation 2. In a specific embodiment, the cast-in-place concrete foundation 2 uses C25 or C30 concrete, while the precast concrete pad 3 is precast using concrete of not less than C30. This ensures that the precast concrete pad 3 has sufficient strength and rigidity to bear the weight of the drainage pipe 4 and construction loads, and will not be damaged or excessively deformed due to insufficient strength, thus providing stable and reliable support for the drainage pipe 4.

[0023] In this embodiment, the precast concrete pad 3 has a steel mesh embedded inside.

[0024] Specifically, the steel mesh is arranged in a single layer with a spacing of not less than 200mm. In a preferred embodiment, the precast concrete pad 3 is designed to be 800mm long and 500mm wide to provide stable support.

[0025] In this embodiment, the bottom wall of the trench 1 is provided with a positioning groove. The bottom of the precast concrete pad 3 is provided with a positioning protrusion 31 that matches the positioning groove. Specifically, each precast concrete pad 3 is provided with at least two positioning protrusions 31 along the laying direction of the drainage pipe 4. This arrangement can effectively prevent the precast concrete pad 3 from deflecting around its vertical axis, further improving stability. As a preferred fit, the cross-sections of the positioning groove and the positioning protrusion 31 are dovetail-shaped or trapezoidal.

[0026] In this embodiment, the upper surface of the precast concrete pad 3 is provided with an arc-shaped support surface 32 that matches the curvature of the outer wall of the drainage pipe 4.

[0027] It should be noted that the arc-shaped support surface 32 of this application fits snugly against the outer wall of the drainage pipe 4, transforming the traditional point or line contact into a surface contact, thus increasing the contact area between the precast concrete pad 3 and the drainage pipe 4. This allows the pipe load to be evenly transferred to the precast concrete pad 3, avoiding the risk of pressure damage to the outer wall concrete of the drainage pipe 4 due to stress concentration. Simultaneously, this tight fit enhances the stability of the drainage pipe 4 during installation and pouring, preventing it from rolling.

[0028] In this embodiment, the template 5 includes a vertical plate 51, a horizontal plate 52, and a diagonal bracing plate 53. The vertical plate 51 is vertically disposed on the bottom wall of the trench 1 and located outside the drainage pipe 4. One end of the horizontal plate 52 is connected to the side wall of the trench 1, and the other end is connected to the side of the vertical plate 51. The diagonal bracing plate 53 is disposed at an angle, with its two ends connected to the side wall of the trench 1 and the side of the vertical plate 51, respectively, and the diagonal bracing plate 53 is located above the horizontal plate 52.

[0029] It should be noted that the horizontal plate 52 and the diagonal bracing plate 53 of this application work together to reliably transfer the load of the formwork 5 to the sidewall of the trench 1, which enhances the rigidity and stability of the entire support system. This not only ensures construction safety but also provides key technical conditions for achieving one-time integral pouring of the foundation concrete.

[0030] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of this application.

Claims

1. An integral foundation structure for reinforced concrete drainage pipes, comprising a cast-in-place concrete foundation (2) disposed within a trench (1), characterized in that, Also includes: Multiple precast concrete blocks (3) are laid at intervals on the bottom wall of the trench (1) along the laying direction of the drainage pipe (4) to support the drainage pipe (4). The drainage pipe (4) is provided with templates (5) on both sides to define the cross-sectional shape of the cast-in-place concrete foundation (2); the cast-in-place concrete foundation (2) is an integral structure cast in one go, which fills the space between the templates (5) and wraps around the bottom and lower sides of the drainage pipe (4) upwards, thereby wrapping and fixing the lower part of the drainage pipe (4) and all the precast concrete pads (3) inside it to form an integral pipe base foundation.

2. The integral foundation structure for reinforced concrete drainage pipes according to claim 1, characterized in that, The precast concrete pad (3) has a steel mesh embedded inside.

3. The integral foundation structure for reinforced concrete drainage pipes according to claim 1, characterized in that, The concrete strength grade of the precast concrete pad (3) shall not be lower than that of the cast-in-place concrete foundation (2).

4. The integral foundation structure for reinforced concrete drainage pipes according to claim 1, characterized in that, The bottom wall of the groove (1) is provided with a positioning groove; The bottom of the precast concrete pad (3) is provided with a positioning protrusion (31) that matches the positioning groove.

5. The integral foundation structure for reinforced concrete drainage pipes according to claim 1, characterized in that, The upper surface of the precast concrete pad (3) is provided with an arc-shaped support surface (32) that matches the curvature of the outer wall of the drainage pipe (4).

6. The integral foundation structure for reinforced concrete drainage pipes according to claim 1, characterized in that, The template (5) includes a vertical plate (51), a horizontal plate (52), and a diagonal bracing plate (53); The vertical plate (51) is vertically disposed on the bottom wall of the trench (1) and located on the outside of the drainage pipe (4); One end of the horizontal plate (52) is connected to the side wall of the groove (1), and the other end is connected to the side of the vertical plate (51); The inclined bracing plate (53) is inclined and its two ends are respectively connected to the side wall of the groove (1) and the side of the vertical plate (51), and the inclined bracing plate (53) is located above the horizontal plate (52).

7. The integral foundation structure for reinforced concrete drainage pipes according to claim 1, characterized in that, The angle at which the cast-in-place concrete foundation (2) wraps around the outer wall of the drainage pipe (4) is between 90° and 135°.

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