Stepped assembly type retaining wall suitable for manual hole digging pile of power transmission line

Abstract

The utility model discloses a stepped assembly type retaining wall suitable for a manual hole digging pile of a power transmission line, which belongs to the technical field of foundation construction of hole digging piles and comprises a plurality of retaining wall ring bodies which are arranged from top to bottom, the radiuses of the retaining wall ring bodies are gradually reduced, and each retaining wall ring body is formed by mutually connecting a plurality of arc-shaped retaining wall units through retaining wall connecting pieces; each retaining wall unit comprises an annular wall body, a supporting top plate and a supporting bottom plate, and the supporting top plates and the supporting bottom plates of the upper and lower adjacent annular body retaining walls are matched in size. The step type assembly type retaining wall is prefabricated in a factory and has the advantages of being high in machining precision, little in construction site pollution, short in construction period and stable and reliable in engineering quality, and the problems that the construction efficiency is low and the quality is difficult to stably control are effectively solved. The whole step-shaped assembly type retaining wall is in a horn mouth shape, the risk that soil at the upper end collapses inwards in the construction process is effectively avoided, and meanwhile the anti-pulling strength of the pile foundation is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cast-in-place pile foundation construction, in particular to a stepped assembled retaining wall applicable to manual cast-in-place piles of transmission lines. Background Technique

[0002] Manual cast-in-place piles are widely used in the field of transmission lines due to their strong flexibility and adaptability, simple construction, and relatively low cost. Their advantages are more prominent especially in occasions with complex geological conditions where mechanical equipment is difficult to operate. The retaining wall of manual cast-in-place piles is an important measure to ensure construction safety. It can effectively prevent the collapse of the hole wall, protect the lives of construction workers, maintain the stability inside the hole, ensure the quality and progress of the cast-in-place piles, and play an indispensable role in ensuring the smooth progress of the overall project. The retaining wall of manual cast-in-place piles mainly relies on manual operation, and has the following disadvantages: low construction efficiency, difficult to stably control the quality; high labor intensity of workers, poor working environment, and high safety hazards; at the same time, manual operation is easily affected by human factors, resulting in uneven quality of the retaining wall, affecting the overall project quality and safety.

[0003] In order to improve construction efficiency and quality and reduce safety risks, there is an urgent need to propose a stepped assembled retaining wall applicable to manual cast-in-place piles of transmission lines. Summary of the Utility Model

[0004] In order to overcome the defects of the prior art, the technical problem to be solved by the utility model is to propose a stepped assembled retaining wall applicable to manual cast-in-place piles of transmission lines. The stepped assembled retaining wall and its construction method have the advantages of high processing accuracy, less pollution at the construction site, short construction period, and stable and reliable project quality.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A stepped assembled retaining wall applicable to manual cast-in-place piles of transmission lines provided by the utility model includes a plurality of retaining wall rings arranged from top to bottom with gradually decreasing radii. The retaining wall rings are formed by connecting a plurality of arc-shaped retaining wall units through retaining wall connectors. The retaining wall unit includes an annular wall body, a support top plate, and a support bottom plate. The support top plate is perpendicular to the radial direction of the annular wall body and extends outward, and the support bottom plate is perpendicular to the radial direction of the annular wall body and extends inward. The sizes of the support top plate and the support bottom plate of the adjacent upper and lower ring retaining walls are matched.

[0007] The preferred technical solution of the utility model is that bolt holes are provided on both sides of the annular wall body. The retaining wall connector is a square iron member with a certain arc. The arc of the retaining wall connector is matched with the inner wall of the annular wall body. There is a round hole at each end of the retaining wall connector, and a fastening bolt passes through the round hole and is fastened to the bolt hole of the annular wall body.

[0008] Preferably, in the technical solution of the present utility model, corresponding connection holes are provided on both the supporting top plate and the supporting bottom plate.

[0009] Preferably, in the technical solution of the present utility model, a square concave surface is provided at the trisection of the annular wall body, and fastening holes are evenly distributed in the square concave surface.

[0010] Preferably, the present utility model further includes an auxiliary hoisting device for hoisting the retaining wall ring body; the auxiliary hoisting device includes a main support rod, an adjusting mechanism, a support chassis, and a hoisting ring; the support chassis is composed of three legs, the top end of the support chassis is slidably connected to the main support rod through the adjusting mechanism, and the hoisting ring is fixedly arranged on the main support rod.

[0011] The beneficial effects of the present utility model are as follows:

[0012] The stepped prefabricated retaining wall provided by the present utility model is applicable to manual dug piles of transmission lines. The stepped prefabricated retaining wall is prefabricated in a factory, and has the advantages of high processing accuracy, less pollution at the construction site, short construction period, and stable and reliable engineering quality, effectively solving the problems of low construction efficiency and difficult stable quality control; the stepped prefabricated retaining wall is in a flared shape as a whole, effectively avoiding the risk of inward collapse of the upper soil during the construction process, and further improving the uplift strength of the pile foundation;

[0013] By setting the auxiliary hoisting device, the adaptability to different sizes of prefabricated retaining walls is realized, and the hoisting efficiency and installation convenience of the prefabricated retaining wall are improved. Description of the Drawings

[0014] Figure 1 is a schematic diagram of the overall structure of the retaining wall;

[0015] Figure 2 is a sectional view of the overall retaining wall;

[0016] Figure 3 is a schematic diagram of the structure of the retaining wall unit;

[0017] Figure 4 is a schematic diagram of the structure of the retaining wall ring body;

[0018] Figure 5 is a schematic diagram of the structure of the auxiliary hoisting device;

[0019] In the figure:

[0020] 1. Retaining wall ring body; 2. Retaining wall unit; 3. Retaining wall connecting piece; 4. Annular wall body; 5. Support top plate; 6. Support bottom plate; 7. Bolt hole; 8. Connecting hole; 9. Square concave surface; 10. Fastening hole; 11. Auxiliary hoisting device; 12. Main support rod; 13. Adjusting mechanism; 14. Support chassis; 15. Hoisting ring. Detailed implementation mode

[0021] The technical solution of the present utility model will be further described below in conjunction with the accompanying drawings and through specific implementation modes.

[0022] As shown in the figure, this embodiment provides a stepped prefabricated retaining wall applicable to manual dug piles of transmission lines, including several retaining wall ring bodies 1 arranged from top to bottom with gradually decreasing radii. The overall shape of the retaining wall is a flared mouth, effectively avoiding the risk of the upper soil caving inwards during the construction process, and at the same time further improving the anti-pulling strength of the pile foundation;

[0023] The retaining wall ring body 1 is formed by connecting three arc-shaped retaining wall units 2 to each other through a retaining wall connecting piece 3. The arc length of the annular wall body 4 of the retaining wall unit 2 is one-third of the circumference of the retaining wall ring body 1. The retaining wall unit 2 includes an annular wall body 4, a support top plate 5, and a support bottom plate 6. The support top plate 5 is perpendicular to the radial direction of the annular wall body 4 and extends outwards, and the support bottom plate 6 is perpendicular to the radial direction of the annular wall body 4 and extends inwards. The sizes of the support top plate 5 and the support bottom plate 6 of the adjacent upper and lower ring retaining walls match.

[0024] Bolt holes 7 are provided on both sides of the annular wall body 4. The retaining wall connecting piece 3 is a square iron member with a certain arc, and the arc of the retaining wall connecting piece 3 matches the inner wall of the annular wall body 4. There is a round hole at each end of the retaining wall connecting piece 3. The fastening bolts pass through the round holes and are fastened to the bolt holes 7 of the annular wall body 4 for the connection and fastening of adjacent retaining wall units 2.

[0025] Corresponding connecting holes 8 are provided on both the support top plate 5 and the support bottom plate 6 for the connection and fastening of adjacent upper and lower retaining wall ring bodies 1.

[0026] Square concave surfaces 9 are provided at the three equal parts of the annular wall body 4, which are convenient for force support during the handling of the retaining wall. Uniformly distributed fastening holes 10 are provided in the square concave surfaces 9 for the connection and fastening of the retaining wall and the surrounding soil layer.

[0027] It further includes an auxiliary hoisting device 11 for hoisting the retaining wall ring body 1; the auxiliary hoisting device 11 includes a main support rod 12, an adjusting mechanism 13, a support chassis 14, and a hoisting ring 15; the support chassis 14 is composed of three feet, the top of the support chassis 14 is slidably connected to the main support rod 12 through the adjusting mechanism 13, the hoisting ring 15 is fixedly arranged on the main support rod 12, and the support base can be adjusted according to the diameter of the retaining wall ring body 1 for hoisting the retaining wall ring body 1.

[0028] Construction method:

[0029] Excavate the soil for the retaining wall, with the radius of the soil slightly larger than the radius of the annular wall body 4 and the depth of the soil slightly larger than the depth of the retaining wall ring body 1; after the excavation of the soil for the retaining wall is completed, adjust the adjusting mechanism 13 of the auxiliary hoisting device 11 on the ground so that the radius of the auxiliary hoisting device 11 is the same as the radius of the retaining wall ring body 1. Assemble the retaining wall ring body 1 on the ground, evenly place each retaining wall unit 2 on the chassis of the auxiliary hoisting device 11, and use the retaining wall connecting piece 3 and bolts to tightly connect adjacent retaining wall units 2 to form a complete retaining wall ring body 1; use the deep foundation pit integrated machine combined with the auxiliary hoisting mechanism to hoist the assembled retaining wall ring body 1 to the bottom of the excavated foundation pit; use the fastening bolts to pass through the connecting holes 8 and the fastening holes 10 and embed them outward into the soil layer around the foundation pit, so that the support top plate 5, the annular wall body 4 and the surrounding soil layer are fastened. Among them, the support top plate 5 of the lower section of the retaining wall ring body 1 is fastened to the support bottom plate 6 of the upper section of the retaining wall ring body 1; repeat the above steps to excavate and install other sections of prefabricated retaining walls until all the prefabricated retaining walls are connected into a whole.

[0030] The present utility model is described through preferred embodiments. Those skilled in the art know that without departing from the spirit and scope of the present utility model, various changes or equivalent replacements can be made to these features and embodiments. The present utility model is not limited by the specific embodiments disclosed herein, and other embodiments falling within the scope of the claims of this application belong to the scope of protection of the present utility model.

Claims

1. A stepped assembled retaining wall suitable for artificial bored piles of power transmission lines, characterized by: It comprises a plurality of wall protection ring bodies (1) arranged from top to bottom and with gradually decreasing radius, wherein the wall protection ring body (1) comprises a plurality of arc-shaped wall protection units (2) connected to each other via wall protection connectors (3); The wall protection unit (2) comprises an annular wall body (4), a supporting top plate (5) and a supporting bottom plate (6); the supporting top plate (5) is perpendicular to the annular wall body (4) and radially outward, and the supporting bottom plate (6) is perpendicular to the annular wall body (4) and radially inward; the supporting top plates (5) and supporting bottom plates (6) of upper and lower adjacent annular wall protections are of the same size.

2. The stepped assembled retaining wall suitable for bored piles of power transmission lines according to claim 1 is characterized in that: Bolt holes (7) are provided on both sides of the annular wall body (4); the wall protection connecting piece (3) is a square iron member with a certain curvature; the curvature of the wall protection connecting piece (3) matches the inner wall of the annular wall body (4); and the two ends of the wall protection connecting piece (3) each have a circular hole, which is fastened to the bolt hole (7) of the annular wall body (4) by passing a fastening bolt through the circular hole.

3. The stepped assembled retaining wall suitable for bored piles of power transmission lines according to claim 2 is characterized by: The supporting top plate (5) and the supporting bottom plate (6) are both provided with corresponding connection holes (8).

4. The stepped assembled retaining wall suitable for bored piles of power transmission lines according to claim 3 is characterized by: The annular wall body (4) is provided with a square inner concave surface (9) at three equal parts, and the square inner concave surface (9) is provided with evenly distributed locking holes (10).

5. The stepped assembled retaining wall suitable for bored piles of power transmission lines according to claim 4 is characterized by: It also includes an auxiliary lifting device (11) for lifting the wall protection ring body (1); The auxiliary lifting device (11) comprises a main support rod (12), an adjustment mechanism (13), a support base frame (14), and a lifting ring (15); The supporting frame (14) is composed of three supporting legs. The top end of the supporting frame (14) is slidably connected to the main supporting rod (12) through an adjusting mechanism (13). The lifting ring (15) is fixedly mounted on the main supporting rod (12).

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