A prefabricated anti-slide pile retaining wall with mortise and tenon joints and its construction method

Abstract

This invention discloses a prefabricated anti-slide pile retaining wall with mortise and tenon joints, comprising multiple prefabricated modules. Each prefabricated module includes two U-shaped prefabricated parts and two flat prefabricated parts. The ends of the U-shaped prefabricated parts are formed with first tenons arranged at intervals along the length of the end face, and a first mortise is formed between every two spaced first tenons. The ends of the flat prefabricated parts are formed with second tenons arranged at intervals along the length of the end face, and a second mortise is formed between every two spaced second tenons. The second tenons on the flat prefabricated parts are connected to the first mortise on the U-shaped prefabricated parts, and the second mortise on the flat prefabricated parts are connected to the first tenons on the U-shaped prefabricated parts. The splicing joints avoid the four corners where stress is concentrated, reducing the internal force on the retaining wall during excavation. The simple splicing method greatly strengthens the connection force between structures, and the mortise and tenon grooves are inclined to restrain each other to resist the lateral pressure from the soil, thus enhancing the safety of the structure.

Description

Technical Field

[0001] This invention relates to the field of anti-slide pile retaining wall technology, specifically to a prefabricated anti-slide pile retaining wall with mortise and tenon joints and its construction method. Background Technology

[0002] Anti-slide piles are piles that penetrate deep into the landslide bed and stabilize the slope by resisting the sliding force of the landslide mass. Due to their advantages such as simple and convenient construction, small earthwork volume, and significant slope stabilization effect, they are widely used in the protection and control of large landslides and play an important role in geological disaster prevention. During the construction of anti-slide piles, when the pile pit is located in loose soil or weathered and fractured rock layers, a retaining wall of a certain thickness is often installed to ensure temporary stability during the excavation of the anti-slide piles, preventing the surrounding soil and rock from falling off or collapsing and threatening the safety of construction personnel and equipment in the pit.

[0003] Traditional anti-slide pile retaining wall construction involves sequentially tying reinforcing bars, installing formwork, and pouring concrete after each excavation to a certain depth. The concrete must then cure to a certain strength before the next section of the retaining wall can be safely constructed. This method is complex, time-consuming, and wastes significant manpower and resources, making it unsuitable for urgent projects. Construction companies often shorten concrete curing time to save costs, leading to insufficient mechanical properties of the retaining wall and creating numerous safety hazards. Summary of the Invention

[0004] In view of the deficiencies existing in the prior art, the purpose of this invention is to provide a prefabricated anti-slide pile retaining wall with mortise and tenon joints and its construction method, in order to solve the above-mentioned technical problems.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A prefabricated anti-slide pile retaining wall with mortise and tenon joints includes multiple prefabricated modules, which are connected in sequence to form a retaining wall. Each prefabricated module includes two U-shaped prefabricated parts and two flat prefabricated parts. The two ends of the two U-shaped prefabricated parts are arranged opposite each other, and the two flat prefabricated parts are respectively connected between the two ends of the two U-shaped prefabricated parts to form a ring-shaped prefabricated module.

[0007] The U-shaped precast component has first tenons arranged at intervals along the length of the end face at its end, and a first mortise is formed between every two spaced first tenons.

[0008] The end of the flat precast component has second tenons arranged sequentially at intervals along the length of the end face, and a second mortise is formed between every two spaced second tenons. The second tenons on the flat precast component are connected to the first mortise on the U-shaped precast component.

[0009] Optionally, the end faces of both the first and second tenons are trapezoidal.

[0010] Optionally, both the ends of the U-shaped precast component and the ends of the flat precast component are formed with stepped end faces, and the stepped end faces of the U-shaped precast component and the flat precast component are connected in a mating manner.

[0011] Optionally, the ends of the U-shaped precast component and the stepped end faces of the flat precast component are both two-layered steps, with tenons arranged at intervals on each step.

[0012] Optionally, the two steps can be of the same thickness.

[0013] Optionally, the tenons on the first step and the tenons on the second step are arranged in an alternating pattern.

[0014] Optionally, the trapezoidal bevels of the first and second tenons are both inclined from one side to the other along the direction of the tenon thickness, and the inclination directions of the trapezoidal bevels of the first and second tenons are the same.

[0015] Optionally, the upper and lower surfaces of the flat precast component are parallel to each other and are arranged at an angle, with the angle of inclination of the upper and lower surfaces being the same as the angle of inclination of the hypotenuse of the trapezoid.

[0016] Optionally, in each prefabricated module, the upper parts of two flat prefabricated components are connected between the two ends of two U-shaped prefabricated components, the two flat prefabricated components are staggered with the two U-shaped prefabricated components, and two installation gaps are formed between the upper parts of the two U-shaped prefabricated components. The two installation gaps are respectively used to connect the lower parts of two flat prefabricated components in another prefabricated module.

[0017] Optionally, the first prefabricated module located near the ground surface can extend upwards, and the portion extending beyond the ground surface can serve as a prefabricated pile well lock.

[0018] This invention also employs a construction method for prefabricated anti-slide pile retaining walls using mortise and tenon joints, comprising:

[0019] Excavate a rectangular pile well downwards, with a single excavation depth equal to the height of one section of precast retaining wall. Level the soil at the bottom of the pile well foundation pit corresponding to the retaining wall position.

[0020] Two U-shaped retaining wall prefabricated components were hoisted and placed in their corresponding positions;

[0021] Two prefabricated planar retaining wall components were hoisted and assembled with the U-shaped retaining wall components using dovetail joints, and then placed in their corresponding positions.

[0022] Repeat the assembly process until the designed elevation of the pile bottom is reached.

[0023] The technical solution of this invention has at least the following technical effects:

[0024] 1. This invention can significantly shorten the on-site construction time of anti-slide pile retaining walls, reduce construction procedures, and improve construction efficiency by using prefabricated retaining wall and interlocking components that do not require anchoring or casting.

[0025] 2. This invention can ensure that the splicing joints of the precast retaining wall components avoid the four corners where stress is concentrated in the structure, reduce the internal force on the retaining wall during excavation, and enhance the safety of the structure.

[0026] 3. This invention uses a mortise and tenon structure for connection, which greatly strengthens the connection between structures through a simple splicing method. At the same time, the mortise and tenon grooves are inclined to restrain each other to resist the lateral pressure from the soil.

[0027] 4. The construction method of the present invention can effectively achieve the above-mentioned wall protection function, can be quickly assembled on site, reduces construction procedures, improves construction efficiency, and is applicable to the construction of pile well wall protection for manually excavated rectangular cross-section piles in various soil layers. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0029] Figure 1 A perspective view of the assembled anti-slide pile retaining wall with mortise and tenon connection provided by the present invention;

[0030] Figure 2 An exploded view of the prefabricated module provided by the present invention;

[0031] Figure 3 This is a front view of the U-shaped prefabricated component provided by the present invention;

[0032] Figure 4 This is a side view of the flat plate preform provided by the present invention.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Precast module; 2. U-shaped precast component; 3. Flat precast component; 4. First tenon; 5. First mortise; 6. Second tenon; 7. Second mortise. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0036] Example 1

[0037] Combination Figures 1-4 As shown, an embodiment of the present invention provides a prefabricated anti-slide pile retaining wall with mortise and tenon joints. The retaining wall includes multiple prefabricated modules, which are connected sequentially from top to bottom to form the retaining wall. The retaining wall is used for installation inside the pile well and can support the stability of the surrounding rock and soil inside the pile well. It is easy to understand that, depending on the size and depth of each pile well, different numbers and sizes of prefabricated modules can be used to assemble the required retaining wall according to actual needs. The thickness of the prefabricated modules is generally 300-500mm, and the height of a single prefabricated module is 800-1500mm.

[0038] In this embodiment, each prefabricated module includes two U-shaped prefabricated components and two flat prefabricated components. The two ends of the two U-shaped prefabricated components are arranged opposite each other, and the two flat prefabricated components are respectively connected between the two ends of the two U-shaped prefabricated components, thus forming a ring-shaped prefabricated module. It is easy to understand that the ring shape of the prefabricated module can be set according to the shape and specifications of each pile well. In this embodiment, a rectangular ring is used, but in other embodiments, a circular ring or a polygonal ring can be used. The splicing position of the U-shaped prefabricated components and the flat prefabricated components is located on the long side plane of the rectangular ring of the entire retaining wall, rather than at the four corners of the rectangular retaining wall structure where stress concentration occurs, thus reducing the internal force at the connection of the retaining wall during the pile well excavation process.

[0039] Furthermore, in this embodiment, the U-shaped precast component has first tenons arranged at intervals along the length of its end face, with a first mortise formed between every two spaced-apart first tenons; the flat precast component has second tenons arranged at intervals along the length of its end face, with a second mortise formed between every two spaced-apart second tenons. The second tenons on the flat precast component mate with the first mortise on the U-shaped precast component, and vice versa. It is worth noting that the end faces of both the first and second tenons in this embodiment are trapezoidal, and the thickness of the tenons is generally 200-400mm. Through the connection of the tenons and mortises, precise alignment of the flat and U-shaped precast components can be achieved after installation, strengthening the retaining wall's resistance to lateral earth pressure.

[0040] Furthermore, in this embodiment, both the ends of the U-shaped precast component and the flat precast component form stepped end faces, which are connected to each other. The stepped end faces of both the U-shaped and flat precast components consist of two layers of steps, each layer having tenons arranged at intervals. The thickness of the two layers of steps is the same, and the tenons on the first and second layers of steps are staggered. Therefore, when the tenons and mortises of the ends of the U-shaped and flat precast components mate, a staggered connection joint is formed. The U-shaped and flat precast components are connected by a staggered structure of tenons and mortises at a certain angle, and the two layers of tenons are themselves arranged in a stepped, staggered manner. Without the assistance of other connecting parts, the staggered arrangement fixes the movement tendency between each section of the retaining wall, and the tenons and mortises fix the vertical movement tendency between each component, while the angled arrangement overcomes the soil pressure from the sides. Compared to traditional rectangular retaining walls, prefabricated rectangular retaining walls reduce procedures, improve efficiency, and are suitable for the protection of rectangular pile wells excavated manually in various soil layers.

[0041] Furthermore, in each prefabricated module, the upper parts of two flat prefabricated components are connected between the two ends of two U-shaped prefabricated components, and the two flat prefabricated components are staggered with the two U-shaped prefabricated components. Two installation gaps are formed between the upper parts of the two U-shaped prefabricated components. The two installation gaps are used to connect the lower parts of the two flat prefabricated components in another prefabricated module, thereby forming a staggered arrangement between the prefabricated modules as well.

[0042] Furthermore, in this embodiment, the trapezoidal bevels of both the first and second tenons are inclined from one side to the other along the direction of the tenon thickness, and the inclination directions of the trapezoidal bevels of the first and second tenons are the same. Correspondingly, the upper and lower end faces of the flat precast component are parallel to each other, and the upper and lower end faces are arranged at an inclination, with the inclination angles of the upper and lower end faces being the same as the inclination angles of the trapezoidal bevels.

[0043] It is worth noting that the first section of the prefabricated retaining wall, located on the ground surface and connected by mortise and tenon joints, extends upwards, ensuring that the U-shaped precast component at the top of the connected section is level with the flat precast component. The extension length is generally 300mm-500mm, and the thickness is generally 500mm. The extended portion protrudes from the ground surface as a locking point for pile well construction, preventing the pile well opening from collapsing. The final section of the retaining wall, located at the end, has its flat precast component shortened to ensure that it maintains the same height as the U-shaped precast component after connection, generally 1000-1500mm, to ensure a flat bottom for the construction pile well without requiring excessive excavation.

[0044] It is worth noting that the precast components in this embodiment are made of reinforced concrete, and lightweight aggregate concrete should be used. With sufficient curing days, while ensuring sufficient strength, the lightweight precast components are more conducive to transportation and on-site construction.

[0045] Furthermore, in this embodiment, the inner wall side of the tenon of the U-shaped precast component can be smoothed or the opening enlarged to ensure more accurate and smooth connection of the planar retaining wall precast components. The gap left will be filled during the anti-slide pile construction and pouring process. The connection position between the U-shaped precast component and the planar precast component should preferably be located between 1 / 8 and 1 / 6 of the long side of the retaining wall, that is, near the area where the bending moment on the long side of the retaining wall is lowest, to ensure that the connection is less stressed and more stable. Reinforcing ribs are provided inside the groove of the tenon to ensure that the dovetail joint structure has sufficient strength to cope with the soil pressure from the side.

[0046] Example 2

[0047] As another embodiment of the present invention, this embodiment discloses a construction method for a prefabricated anti-slide pile retaining wall with mortise and tenon joints, including:

[0048] Excavate a rectangular pile well downwards, with a single excavation depth equal to the height of one section of precast retaining wall. Level the soil at the bottom of the pile well foundation pit corresponding to the retaining wall position.

[0049] Two U-shaped retaining wall prefabricated components were hoisted and placed in their corresponding positions;

[0050] Two prefabricated planar retaining wall components were hoisted and assembled with the U-shaped retaining wall components using dovetail joints, and then placed in their corresponding positions.

[0051] Repeat the assembly process until the designed elevation of the pile bottom is reached.

[0052] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application and 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, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0053] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A prefabricated anti-slide pile retaining wall with mortise and tenon joints, characterized in that, It includes multiple prefabricated modules, which are connected in sequence to form a protective wall. Each prefabricated module includes two U-shaped prefabricated parts and two flat prefabricated parts. The two ends of the two U-shaped prefabricated parts are arranged opposite each other, and the two flat prefabricated parts are respectively connected between the two ends of the two U-shaped prefabricated parts to form a ring-shaped prefabricated module. The U-shaped precast component has first tenons arranged sequentially at intervals along the length of the end face at its end, and a first mortise is formed between every two spaced first tenons. The end of the flat precast component is formed with second tenons arranged sequentially at intervals along the length of the end face, and a second mortise is formed between every two spaced second tenons. The second tenons on the flat precast component are connected to the first mortise on the U-shaped precast component. The second mortise on the flat precast component is connected to the first tenon on the U-shaped precast component. The end faces of both the first tenon and the second tenon are trapezoidal; The trapezoidal hypotenuses of the first tenon and the second tenon are inclined from one side to the other along the direction of the tenon thickness, and the inclination directions of the trapezoidal hypotenuses of the first tenon and the second tenon are the same. The upper and lower surfaces of the flat precast component are parallel to each other, and the upper and lower surfaces are arranged at an angle, with the angle of inclination being the same as the angle of inclination of the hypotenuse of the trapezoid.

2. The assembled anti-slide pile retaining wall with mortise and tenon connection as described in claim 1, characterized in that, Both the end of the U-shaped preform and the end of the flat preform form a stepped end face, and the stepped end face of the U-shaped preform and the stepped end face of the flat preform are connected to each other.

3. The assembled anti-slide pile retaining wall with mortise and tenon connection as described in claim 2, characterized in that, The ends of the U-shaped precast component and the stepped end faces of the flat precast component are both two-layered steps, with tenons arranged at intervals on each step.

4. The assembled anti-slide pile retaining wall with mortise and tenon connection as described in claim 3, characterized in that, The two steps described have the same thickness.

5. The assembled anti-slide pile retaining wall with mortise and tenon connection as described in claim 3, characterized in that, The tenons on the first step and the tenons on the second step are arranged in an alternating pattern.

6. The assembled anti-slide pile retaining wall with mortise and tenon connection as described in claim 1, characterized in that, In each of the prefabricated modules, the upper parts of the two flat prefabricated components are connected between the two ends of the two U-shaped prefabricated components, the two flat prefabricated components are staggered with the two U-shaped prefabricated components, and two installation gaps are formed between the upper parts of the two U-shaped prefabricated components. The two installation gaps are respectively used to connect the lower parts of the two flat prefabricated components in another prefabricated module.

7. A construction method for a prefabricated anti-slide pile retaining wall with mortise and tenon joints, characterized in that, include: Excavate a rectangular pile well downwards, with a single excavation depth equal to the height of one section of precast retaining wall. Level the soil at the bottom of the pile well foundation pit corresponding to the retaining wall position. Two U-shaped retaining wall prefabricated components were hoisted and placed in their corresponding positions; Two prefabricated planar retaining wall components were hoisted and assembled with the U-shaped retaining wall components using dovetail joints, and then placed in their corresponding positions. Repeat the assembly process until the designed elevation of the pile bottom is reached.

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