Fabricated arched retaining structure and construction method thereof

Abstract

The invention provides a fabricated arched retaining structure and a construction method thereof, and belongs to the technical field of civil engineering. The assembly type arched supporting and retaining structure mainly comprises prefabricated piles, prefabricated arched baffles, prefabricated arched crown beams and prefabricated arched waist beams, and is structurally characterized in that all the components are combined in a mortise and tenon joint mode, and close fit and overall connection between the prefabricated components are achieved. Through the application of the mortise and tenon joint structure, the construction process is simplified, and dependence on traditional connecting pieces is reduced. The advantages of the arch structure are fully utilized, and the arch structure is reasonable in structural design, efficient in construction, capable of saving land, beneficial to environmental protection, suitable for rapid supporting engineering in complex side slope and landslide control, remarkable in construction efficiency advantage and good in anti-sliding stability.

Description

Technical Field

[0001] The present invention relates to the field of civil engineering, and in particular to an assembled arch retaining structure and a construction method thereof. Background Art

[0002] Prior to the present invention, anti-sliding pile retaining structures were mostly cast-in-place, with baffles arranged between the anti-sliding piles to form a pile-sheet wall structure. The baffles were generally in the form of flat plates and were subject to greater tensile stress.

[0003] Traditional cast-in-place concrete retaining walls and anti-slip structures are more difficult to construct in harsh environments, requiring long construction times and being susceptible to external weather and geological conditions. Cast-in-place arch retaining structures require extensive formwork, pouring, and curing processes, resulting in a long construction period, high labor and material costs, and often difficult to accurately achieve dimensions. Therefore, there is an urgent need for an arch retaining structure that is quick to construct, low-cost, and offers superior anti-slip performance. Summary of the Invention

[0004] The present invention aims to provide a prefabricated arch retaining structure and its construction method to address the existing problems of low construction efficiency, high cost, insufficient anti-slip performance, and inconvenient disassembly and replacement. This invention significantly improves the construction efficiency of slope protection projects and reduces material and construction costs.

[0005] The technical solution of the present invention to solve the above problems is as follows: an assembled arch retaining structure, comprising:

[0006] Anti-slip piles (1), the anti-slip piles (1) comprising a plurality of anti-slip piles (1), the anti-slip piles (1) being vertically arranged and embedded in the stable bedrock of the slope to provide vertical and horizontal support;

[0007] An arched member (3), the arched member (3) being a prefabricated member, is disposed between adjacent anti-slip piles (1), the outer arc surface of the arched member facing the air side of the landslide, and is used to convert horizontal thrust into radial pressure, which is ultimately transmitted to the anti-slip piles (1);

[0008] A crown beam (4), the crown beam (4) being arranged on the top of the anti-slip pile (1) and used for connecting adjacent anti-slip piles (1) into a whole;

[0009] The arched waist beam (2) is arranged between the upper and lower arched components (3) and connects the upper and lower arched components (3).

[0010] Furthermore, the arched member (3) and the anti-slip pile (1), the arched member (3) and the arch waist beam (2), the arched member (3) and the arch crown beam (4), and the anti-slip pile (1) and the arch crown beam (4) are connected via mortise and tenon structures to improve the tightness and stability of the connection.

[0011] Furthermore, the crown beam (4) is fixed to the arch member (3) for a second time by means of bolts (5) to enhance the overall rigidity and connection strength.

[0012] Furthermore, the surface of the arched member is coated with a waterproof coating to prevent the steel bars from rusting and the concrete from cracking due to rainwater penetration.

[0013] Furthermore, a rubber shock-absorbing cushion layer is provided between the arched member and the anti-slip pile (1) to mitigate the impact load caused by the landslide and increase the anti-seismic performance of the structure.

[0014] The present application also provides a construction method of an assembled arch retaining structure, comprising the following steps:

[0015] S1. Determine the position of the anti-slide piles (1) at the construction site according to the design requirements, and embed the anti-slide piles (1) into the stable bedrock by drilling or static pressure method; the number and spacing of the anti-slide piles (1) are determined by the stability analysis of the slope to ensure that the anti-slide piles (1) can withstand the landslide thrust;

[0016] S2. After the anti-slip piles (1) are constructed, the prefabricated arch retaining wall (3) components are hoisted between adjacent anti-slip piles (1), and both ends of the arch components are connected to the anti-slip piles (1) through mortise and tenon structures;

[0017] S3, after the arch member (3) is installed, the crown beam (4) is statically pressed, hammered, etc.; after the installation is completed, the crown beam (4) is fixed for a second time using bolts (5);

[0018] S4, hoisting the arch waist beam (2) to a predetermined position and ensuring that it is aligned with the reserved holes of the arch member (3) and the anti-slip pile (1), and then connecting the arch waist beam (2) with the arch member (3) and the anti-slip pile (1) through a mortise and tenon structure;

[0019] S5. Repeat S2-S4 until all assembly work is completed.

[0020] Furthermore, the step S2 further comprises: reinforcing the connection between the crown beam (4), the arched member (3) and the anti-slip pile (1) using grouting material.

[0021] Furthermore, in step S3, a rubber shock-absorbing pad layer is added between the mortise and tenon joints.

[0022] The beneficial effects of the present invention are as follows: by adopting a prefabricated arch structure, the horizontal thrust generated by the slope sliding is converted into radial pressure, so that the anti-slide pile (1) and the arch component jointly bear the landslide thrust, thereby effectively reducing the requirements for the cross section and depth of the anti-slide pile (1). The organic combination of the arch structure, the anti-slide pile (1) and the pile top connecting beam forms a stable protection system that can effectively resist the landslide thrust and improve the reliability of slope management. The use of prefabricated components for on-site assembly significantly shortens the construction period and reduces the impact on the surrounding environment during the construction process, which is particularly suitable for emergency landslide management projects. Moreover, the prefabricated components can be better controlled in the factory production process to ensure that each component meets the design standards, thereby improving the quality of the overall project. Since most of the work is completed in the factory, the on-site construction time is reduced, and the interference to the surrounding environment and residents is relatively small, which is particularly suitable for urban construction and construction near residential areas. The mortise and tenon joints are used between the various components, which are simple to assemble, and the mortise and tenon structure has good strength, toughness and deformation capacity. The insertion between the tenon and the mortise is equivalent to a hinge point in mechanics and can withstand tension and pressure in a specific direction. In terms of earthquake resistance, external destructive forces are absorbed through the stress deformation and friction slip generated between the tenon and the mortise, which dissipates the seismic energy and thus ensures the safety of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a front view of the assembled arch retaining structure of the present invention;

[0024] Figure 2 It is a BB cross-sectional view of the present invention;

[0025] Figure 3 AA cross-sectional view of the present invention;

[0026] Figure 4 Detailed diagram of the mortise and tenon joints between the arched member and the arched waist beam of the present invention;

[0027] Figure 5 Detailed diagram of the crown beam and anti-slip pile mortise and tenon joints of the present invention.

[0028] In the figure: 1. Anti-slip pile; 2. Arch waist beam; 3. Arch member; 4. Arch crown beam; 5. Bolt. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] Example 1

[0031] 1. Construction of anti-slip piles 1: First, determine the location of the anti-slip piles 1 according to the design requirements at the construction site, and use drilling or static pressure to embed the anti-slip piles 1 into the stable bedrock. The number and spacing of the anti-slip piles 1 are determined by the stability analysis of the slope to ensure that the anti-slip piles 1 can withstand the thrust of the landslide. 2. After the construction of the anti-slip piles 1 is completed, the prefabricated arch retaining wall 3 components are hoisted between the adjacent anti-slip piles 1. The ends of the arch components are connected by Figure 2 The mortise and tenon structure shown is tightly connected to the anti-slip pile 1 to ensure integrity and stability. During the installation process, the lifting equipment needs to be operated precisely so that the mortise and tenon joints can be docked smoothly. After the installation is completed, the mortise and tenon joints should be checked to ensure that the joints are tight and seamless. Grouting materials can be used for reinforcement if necessary to improve the bearing capacity of the mortise and tenon nodes. 3. After the arch member 3 is installed, the crown beam 4 is installed to the designated position. The crown beam 4 is installed by static pressure, hammering, etc. to ensure that it can be firmly embedded in the predetermined member. During installation, it should be ensured that the joint surface between the crown beam 4 and the arch retaining wall 3 and the anti-slip pile 1 is tightly fitted. After the installation is completed, the crown beam 4 is fixed for a second time with bolts 5 to further improve its stability and integrity. Before the bolts 5 are fixed, the horizontality of the crown beam 4 and the fit between the retaining wall 3 should be checked in advance to ensure that it meets the design requirements. 4. Installation of the waist beam 2: After the crown beam 4 is installed, the waist beam 2 is installed. The main purpose of installing the arch waist beam 2 is to further enhance the lateral rigidity of the structure and prevent the retaining wall 3 from excessive deformation when subjected to the thrust of the landslide. The arch waist beam 2 must be connected to the arch member 3 and the anti-slip pile 1 through a mortise and tenon structure. During construction, the arch waist beam 2 is first hoisted to the predetermined position and ensured that it is aligned with the reserved holes of the arch member 3 and the anti-slip pile 1. After the installation is completed, the connection between the arch waist beam 2 and each component should be checked in detail to ensure that each connection node is firm and reliable. 5. Repeat S2 and 4 until all assembly work is completed.

[0032] Example 2

[0033] In this embodiment, the arch waist beam 2 is fixed to the retaining wall 3 and the anti-slip pile 1 using bolts 5 or steel bar welding. The bolts 5 at the connection points need to be tightened, and high-strength grouting material is poured at the joints to form a well-integrated connection and enhance the bearing capacity and stability of the arch waist beam 2. Other aspects are the same as those of the specific implementation method.

[0034] Example 3

[0035] Since the connection of the crown beam 4 is relatively complicated, the crown beam 4 can be cast on the top after all the arch components are installed. The crown beam 4 connects all the anti-slip piles 1 into a whole, improving the integrity and rigidity of the structure and ensuring the stability of the structure when subjected to landslide thrust.

[0036] Example 4

[0037] During implementation, to further enhance the durability of the structure, a waterproof coating can be applied to the surface of the arched components to prevent rainwater from penetrating and causing corrosion of the steel bars and cracking of the concrete. High-performance sealant is used to caulk the joints between the crown beam 4 and the waist beam 2 to ensure watertightness.

[0038] Example 5

[0039] A rubber cushion layer is added between the anti-slip pile 1 and the arched member to mitigate the impact load caused by the landslide and improve the seismic performance of the structure. The rubber cushion layer is placed between the mortise and tenon joints to ensure the shock absorption effect without affecting the tightness of the mortise and tenon structure.

[0040] Example 6

[0041] To facilitate construction in cold environments, antifreeze can be added to precast components, and insulation measures can be implemented at key joints during construction. This is especially important during the pouring of the crown beam 4 and the grouting of the joints, ensuring that the concrete temperature is kept within a reasonable range to avoid cracking caused by thermal stress and thus improve the durability of the structure.

[0042] In the description of the present invention, it should be noted that, unless otherwise specified and limited, terms such as mortise and tenon joints should be understood in a broad sense and may include various forms of mortise and tenon joints. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood in specific circumstances.

[0043] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An assembled arch retaining structure, characterized in that: include: Anti-slip piles (1), the anti-slip piles (1) comprising a plurality of anti-slip piles (1), the anti-slip piles (1) being vertically arranged and embedded in the stable bedrock of the slope to provide vertical and horizontal support; An arched member (3), the arched member (3) being a prefabricated member, is disposed between adjacent anti-slip piles (1), the outer arc surface of the arched member facing the air side of the landslide, and is used to convert horizontal thrust into radial pressure, which is ultimately transmitted to the anti-slip piles (1); A crown beam (4), the crown beam (4) being arranged on the top of the anti-slip pile (1) and used for connecting adjacent anti-slip piles (1) into a whole; The arched waist beam (2) is arranged between the upper and lower arched components (3) and connects the upper and lower arched components (3).

2. The assembled arch retaining structure according to claim 1, characterized in that: The arched member (3) and the anti-slip pile (1), the arched member (3) and the arch waist beam (2), the arched member (3) and the arch crown beam (4), and the anti-slip pile (1) and the arch crown beam (4) are connected via a mortise and tenon structure to improve the tightness and stability of the connection.

3. The assembled arch retaining structure according to claim 1 or 2, characterized in that: The crown beam (4) is secondarily fixed to the arched member (3) via bolts (5) to enhance overall rigidity and connection strength.

4. The assembled arch retaining structure according to claim 1, characterized in that: The surface of the arched member is coated with a waterproof coating to prevent steel bar corrosion and concrete cracking caused by rainwater penetration.

5. The assembled arch retaining structure according to claim 1, characterized in that: A rubber shock-absorbing cushion layer is provided between the arched member and the anti-slide pile (1) to mitigate the impact load caused by the landslide and increase the anti-seismic performance of the structure.

6. A construction method for an assembled arch retaining structure, characterized in that: The following steps are involved: S1. Determine the position of the anti-slip pile (1) according to the design requirements at the construction site, and embed the anti-slip pile (1) into the stable bedrock by drilling or static pressure method; The number and spacing of the anti-slide piles (1) are determined by the stability analysis of the slope to ensure that the anti-slide piles (1) can withstand the landslide thrust; S2. After the anti-slip piles (1) are constructed, the prefabricated arch retaining wall (3) components are hoisted between adjacent anti-slip piles (1), and both ends of the arch components are connected to the anti-slip piles (1) through mortise and tenon structures; S3, after the arch member (3) is installed, the crown beam (4) is statically pressed, hammered, etc.; after the installation is completed, the crown beam (4) is fixed for a second time using bolts (5); S4, hoisting the arch waist beam (2) to a predetermined position and ensuring that it is aligned with the reserved holes of the arch member (3) and the anti-slip pile (1), and then connecting the arch waist beam (2) with the arch member (3) and the anti-slip pile (1) through a mortise and tenon structure; S5. Repeat S2-S4 until all assembly work is completed.

7. The construction method according to claim 6, characterized in that: The step S2 further comprises: reinforcing the connection between the crown beam (4), the arched member (3) and the anti-sliding pile (1) using grouting material.

8. The construction method according to claim 6, characterized in that: In step S3, a rubber shock-absorbing pad layer is added between the mortise and tenon joints.

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