Support construction method applied to void part of cast-in-place bearing platform in mountainous area

Abstract

The invention provides a support construction method applied to a cast-in-place bearing platform void part in a mountainous area. The support construction method comprises the following steps that S1, brackets are welded to the corresponding positions of the side walls of poured adjacent pile foundation steel casings at the bearing platform void position; s2, hot-rolled H-shaped steel is sequentially erected above the brackets; s3, I-shaped steel is arranged above the hot-rolled H-shaped steel at equal intervals; and S4, a formwork is laid on the I-shaped steel, bearing platform concrete is poured in a layered mode, and construction is completed. According to the method, the corbel is welded on the surface of the cast pile foundation steel casing, and the H-shaped steel and the I-shaped steel are erected to construct the concrete pouring platform, so that the construction method is optimized when the void condition exists in the design position of the bearing platform.

Description

Technical Field

[0001] The invention belongs to the technical field of pile foundation cap construction in bridge engineering, and in particular relates to a method for constructing a hollowed-out part bracket of a cast-in-place cap in mountainous areas. Background Art

[0002] The cap is an indispensable part of bridge construction. Its main function is to evenly distribute the load of the superstructure to the foundation, thereby reducing local pressure and avoiding uneven settlement of the foundation. At the same time, as the connecting part between the pier and the foundation, the cap provides a stable platform for the superstructure of the bridge. However, when pouring the cap in mountainous areas, the cap is often empty due to changes in the terrain. When building a support on a sloped foundation, if the foundation is not specially treated to prevent landslides, the support may have a downward trend during the construction process due to its own gravity and the component force of the construction load. Moreover, due to the complex geological conditions in mountainous areas, there may be potential risks of geological disasters such as landslides. Existing foundation treatment methods often do not fully take this risk into consideration, and no effective preventive measures are taken to ensure the stability of the support foundation throughout the construction period. In addition, during the construction of the support, the disassembly and assembly methods of the components may not be fully considered, making the assembly process of the support components complicated and time-consuming after being transported to the construction site. The terrain in mountainous areas is complex, and on-site measurement and positioning are difficult. During the construction process, the existing support construction technology may cause insufficient support construction accuracy due to measurement errors and inaccurate positioning. This will affect the subsequent construction quality of the foundation, such as causing the foundation template to be installed unevenly, which in turn affects the surface flatness after concrete pouring.

[0003] In order to ensure the convenience and safety of construction, it is urgent to design a support construction method suitable for the hollow part of the cast-in-place cap in mountainous areas. Summary of the invention

[0004] In view of this, the present invention aims to overcome the defects in the prior art and proposes a construction method for the hollowed-out part of the cast-in-place cap in mountainous areas. The construction method of the present invention is suitable for the case where the mountainous area has complex terrain, a bad construction environment, and the cap is hollowed out during casting. Conventional brackets are difficult to meet the requirements of safety and material saving. After research, a bracket is welded on the cast pile foundation steel casing, and H-shaped steel and I-shaped steel are successively set on the bracket, and finally the template is laid and the cap concrete is cast in layers.

[0005] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0006] A method for constructing a hollowed-out support for a cast-in-place cap in mountainous areas comprises the following steps:

[0007] S1: Weld the bracket at the corresponding position of the side wall of the adjacent pile foundation steel casing that has been poured at the empty position of the cap;

[0008] S2: Hot-rolled H-shaped steels are placed on the corbels in sequence;

[0009] S3: Arrange I-beams at equal intervals above the hot-rolled H-beams;

[0010] S4: Lay the formwork on the I-beam and pour the cap concrete in layers to complete the construction.

[0011] In some embodiments of the present invention, the hot-rolled H-beam in step S2 is obtained by splicing and welding two hot-rolled H-beams.

[0012] In some embodiments of the present invention, the portion exceeding the edge of the pedestal in step S2 is constructed using a single hot-rolled H-shaped steel.

[0013] In some embodiments of the present invention, the hot-rolled H-shaped steel is arranged perpendicular to the top surface of the corbel.

[0014] In some embodiments of the present invention, the direction of the I-beam is perpendicular to the direction of the hot-rolled H-beam.

[0015] In some embodiments of the present invention, the top surfaces of the corbels are located in the same horizontal plane.

[0016] In some embodiments of the present invention, the corbel includes a first corbel and a second corbel, wherein the first corbel is located on the inner side of the steel casing, and the second corbel is located on the outer side of the steel casing at the periphery of the integral cap.

[0017] In some embodiments of the present invention, the length of the top surface of the second corbel is greater than the length of the top surface of the second corbel.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] (1) The method of the present invention constructs a concrete pouring platform by welding a bracket on the surface of the pile foundation steel casing that has been poured, and by laying H-shaped steel and I-shaped steel, thereby optimizing the construction method when there is a void in the design position of the cap;

[0020] (2) The method described in the present invention effectively avoids the potential risks caused by the foundation falling off through a simple and efficient cast-in-place support system, thereby ensuring stability and safety during the construction process.

[0021] at the same time;

[0022] (3) The method of the present invention can effectively control the pouring quality of concrete, reduce defects, and ensure the durability and bearing capacity of the foundation through layered pouring of concrete and reasonable arrangement of supporting structures. This innovative construction method provides a new solution for the construction of foundation engineering in mountainous areas. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0024] Figure 1 This is a bracket arrangement diagram of the hollowed-out portion of the cap according to an embodiment of the present invention;

[0025] Figure 2 The cross section of the support with the hollow part of the support according to the embodiment of the present invention Figure 1 ;

[0026] Figure 3 The cross section of the support with the hollow part of the support according to the embodiment of the present invention Figure 2 .

[0027] Description of reference numerals:

[0028] 1. Distribution beam; 2. Double-piece hot-rolled H-shaped steel; 3. Wedge; 4. First corbel; 5. Second corbel; 6. Steel casing; 7. Hot-rolled H-shaped steel. DETAILED DESCRIPTION

[0029] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0032] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0033] Example

[0034] A method for constructing a hollow support for a cast-in-place cap in mountainous areas, such as Figure 1-3 As shown, the following steps are included:

[0035] S1: Weld the corbels at the corresponding positions of the side walls of the adjacent pile foundation steel casing 6 that has been poured at the empty position of the cap; the corbels can provide a stable support point for the formwork to ensure that the formwork will not deform or shift during the concrete pouring process. The corbels can bear the weight of the formwork and concrete, and effectively transfer these loads to the underlying foundation structure.

[0036] S2: Hot-rolled H-shaped steel 7 is sequentially installed on the corbels; the hot-rolled H-shaped steel 7 is installed on the corbels mainly to bear a larger load. H-shaped steel has a high section modulus and bending strength. When the size of the pedestal is large and the amount of concrete poured is large, its own weight and the live load during the construction process will generate greater pressure. The hot-rolled H-shaped steel 7 can effectively disperse and transfer these loads to the corbels, and then transfer them to the foundation structure by the corbels. Its high load-bearing capacity can prevent structural deformation or even collapse during the construction process.

[0037] S3: Arrange I-beams at equal intervals above the hot-rolled H-beams 7; Arrange I-beams at equal intervals above the hot-rolled H-beams 7 to transfer the upper load (such as the deadweight of the pedestal concrete, the weight of construction equipment and personnel, etc.) to the H-beams more evenly. When pouring concrete, the weight of the concrete will be dispersed through the I-beams to avoid excessive pressure on a certain part of the H-beam due to concentrated loads. This allows the load to be distributed on the lower support structure in a more reasonable way, thereby improving the bearing capacity of the entire support structure.

[0038] Due to the equal spacing of I-beams, when bearing dynamic loads, the loads can be evenly transmitted downward. Without I-beams for such uniform distribution, dynamic loads may produce large impact forces locally, resulting in instability of the support structure. I-beams can effectively convert these dynamic loads into a more stable static load form and transmit them downward.

[0039] S4: Lay the formwork on the I-beam and pour the cap concrete in layers to complete the construction.

[0040] In some embodiments of the present invention, the hot-rolled H-shaped steel 7 in step S2 is obtained by welding two hot-rolled H-shaped steels 7 together. The portion beyond the edge of the pedestal is constructed using a single hot-rolled H-shaped steel 7.

[0041] In some embodiments of the present invention, the direction of the hot-rolled H-shaped steel 7 is perpendicular to the top surface of the corbel. The direction of the I-shaped steel is perpendicular to the direction of the hot-rolled H-shaped steel 7.

[0042] The top surfaces of the corbels are located at the same horizontal plane. In some embodiments of the present invention, the corbels include a first corbel 4 and a second corbel 5, wherein the first corbel 4 is located inside the steel casing 6, and the second corbel 5 is located outside the steel casing 6 outside the integral cap.

[0043] In some embodiments of the present invention, the length of the top surface of the second corbel 5 is greater than the length of the top surface of the second corbel 5 .

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for constructing a hollowed-out support for a cast-in-place cap in mountainous areas, characterized in that: The steps include: S1: Weld the bracket at the corresponding position of the side wall of the adjacent pile foundation steel casing that has been poured at the empty position of the cap; S2: Hot-rolled H-shaped steels are placed on the corbels in sequence; S3: Arrange I-beams at equal intervals above the hot-rolled H-beams; S4: Lay the formwork on the I-beam and pour the cap concrete in layers to complete the construction.

2. The method for constructing the hollowed-out support of the cast-in-place cap in mountainous areas according to claim 1 is characterized in that: The hot-rolled H-shaped steel in step S2 is obtained by welding two hot-rolled H-shaped steels together.

3. The method for constructing the hollowed-out support of a cast-in-place cap in mountainous areas according to claim 1 is characterized in that: The portion exceeding the edge of the pedestal in step S2 is constructed using a single hot-rolled H-shaped steel.

4. The method for constructing the hollowed-out support of a cast-in-place cap in mountainous areas according to claim 1 is characterized in that: The hot-rolled H-shaped steel is arranged perpendicularly to the top surface of the corbel.

5. The method for constructing the hollowed-out support of the cast-in-situ cap in mountainous areas according to claim 4 is characterized in that: The direction of the I-beam is perpendicular to the direction of the hot-rolled H-beam.

6. The method for constructing the hollowed-out support of a cast-in-place cap in mountainous areas according to claim 1 is characterized in that: The top surfaces of the corbels are located on the same horizontal plane.

7. The method for constructing the hollowed-out support of a cast-in-place cap in mountainous areas according to claim 1 is characterized in that: The corbels include a first corbel and a second corbel, wherein the first corbel is located on the inner side of the steel casing, and the second corbel is located on the outer side of the steel casing at the periphery of the integral bearing platform.

8. The method for constructing the hollowed-out support of the cast-in-situ cap in mountainous areas according to claim 7 is characterized in that: The length of the top surface of the second corbel is greater than the length of the top surface of the first corbel.

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