Prefabricated semi-cylindrical steel mould for construction of variable-cross-section semicircular support secant pile

Abstract

The utility model relates to the technical field of steel dies, and discloses a prefabricated semi-cylindrical steel die for construction of a variable cross-section semicircular support secant pile, which comprises a steel die main body, the steel die main body consists of a back plate, an arc-shaped rib plate and a central web plate, the central web plate is welded at the central position of the back plate, and the arc-shaped rib plate is welded at the central position of the back plate when the support secant pile is cast into a pile. The steel mold body is tightly attached to the side wall of a pile hole and perpendicularly placed into the hole, the steel mold body and an upper semicircular reinforcement cage are combined to form an integral structure, pile body concrete is poured after the steel mold is accurately positioned and fixed at the hole opening, the steel mold body is pulled out after the concrete is initially set, and the variable-cross-section supporting secant pile with the circular lower portion and the semicircular top is poured at a time. Accordingly, pile body concrete of the semicircular pile part on the upper portion of the circular pile does not need to be chiseled away, the effects of efficient construction, reliable quality and environmental protection are achieved, the overall structural strength of the steel die body is guaranteed through mutual cooperation of the center web, the straight rib plates and other structures, and the steel die body is not prone to deformation.

Description

Technical Field

[0001] This utility model patent relates to the field of steel mold technology, and more specifically, to a prefabricated semi-cylindrical steel mold for construction of interlocking piles with variable cross-section semi-circular support. Background Technology

[0002] The top-down construction method involves constructing the top slab of the cut-and-cover structure after the retaining structure and supporting piles are completed, restoring traffic to the road above, and then excavating and constructing the substructure beneath the top slab. Because the top surface elevation of the cut-and-cover slab is lower than the existing road surface elevation, a certain height must be excavated before constructing the top slab. Therefore, the top slab design for the top-down construction method uses semi-circular piles supported by interlocking support piles, with the remaining semi-circular piles serving as permanent support structures during the excavation of the top slab.

[0003] The top slab of the excavation and cover is situated on the semi-circular piles of the retaining structure, with 34 interlocking piles for the cover support. According to conventional construction methods, the interlocking piles are poured into the ground in one go. After excavation, the concrete of the upper semi-circular piles is removed. However, since the removal length of each pile is about 4.95m and the concrete strength grade of the interlocking piles is C35, which is relatively strong, the removal of the pile concrete takes a lot of time, resulting in problems such as slow construction progress, increased manpower consumption, and material waste. Utility Model Content

[0004] The purpose of this invention is to provide a prefabricated semi-cylindrical steel mold for the construction of interlocking piles with variable cross-section semi-circular support, aiming to solve the problem that the wall-mounted frame has a relatively simple function in the existing technology.

[0005] This utility model is implemented as follows: a prefabricated semi-cylindrical steel mold for construction of variable cross-section semi-circular support interlocking piles includes a steel mold body. The steel mold body is composed of a back plate, arc-shaped ribs, and a central web plate. The central web plate is welded to the center of the back plate. Several arc-shaped ribs are welded to the central web plate and the bottom plate at axial intervals. The same semi-circular plate is welded to the several arc-shaped ribs. Several straight ribs are welded to the semi-circular plate at axial intervals. The bottom plate is welded to the back plate, and the edge of the bottom plate away from the back plate is welded to the edge of the semi-circular plate.

[0006] Preferably, the central web plate and the back plate are perpendicular to each other, and both the central web plate and the back plate are provided with through holes.

[0007] Preferably, the centerline of the semicircular plate and the two long sides of the semicircular plate are welded to the central web plate and the back plate, respectively.

[0008] Preferably, multiple straight ribs are divided into two groups by a central web, and the two groups of straight ribs are symmetrical to each other.

[0009] Preferably, the central web is provided with multiple weight-reducing grooves, which are distributed at intervals along the axial direction.

[0010] Preferably, the main body of the steel mold is made of Q235 steel and the distance between the main bodies of the steel mold is 980mm.

[0011] Preferably, the end of the central web away from the through hole is welded to the base plate, and the central web and the base plate are perpendicular to each other.

[0012] Preferably, the ends of the plurality of straight ribs away from the semicircular plate are all welded to the back plate, and there is a certain angle between the straight ribs and the back plate.

[0013] Preferably, the back plate has a length of 565 mm and a width of 1000 mm.

[0014] Preferably, the height of the central web is 482mm, and the outer side of the welded parts of the steel mold body is ground and polished.

[0015] Compared with existing technologies, the prefabricated semi-cylindrical steel mold for the construction of variable cross-section semi-circular support interlocking piles provided by this utility model, with a steel mold body welded together by arc-shaped ribs, a central web plate, a bottom plate, a back plate, and a semi-circular plate, can be vertically inserted into the hole by tightly adhering to the side wall of the pile hole during the pile pouring process. It is then combined with the upper semi-circular reinforcing cage to form an integral structure. After the steel mold is accurately positioned and fixed at the hole opening, the pile body concrete is poured. After the concrete has initially set, the steel mold body is pulled out, and the lower circular and top semi-circular variable cross-section support interlocking piles are poured in one go. This eliminates the need to remove the pile body concrete of the upper semi-circular pile of the circular pile, achieving efficient construction, reliable quality, and environmental protection. The cooperation of the central web plate and straight ribs and other structures ensures the overall structural strength of the steel mold body, preventing it from easily deforming. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the prefabricated semi-cylindrical steel mold for construction of interlocking piles with variable cross-section provided by this utility model.

[0017] Figure 2 This is a schematic diagram of the internal structure of the prefabricated semi-cylindrical steel mold for construction of variable cross-section semi-circular support interlocking piles provided by this utility model.

[0018] Figure 3 This is a top view sectional view of the prefabricated semi-cylindrical steel mold for construction of interlocking piles with variable cross-section provided by this utility model.

[0019] Explanation of reference numerals in the attached figures:

[0020] 1. Steel mold body; 2. Arc-shaped ribs; 3. Central web plate; 4. Base plate; 5. Straight ribs; 6. Through holes; 7. Weight reduction grooves; 8. Semi-circular plates; 9. Back plate. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0022] The implementation of this utility model will be described in detail below with reference to specific embodiments.

[0023] 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 utility model, 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 drawings, they are only for the convenience of describing this utility model 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 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.

[0024] Reference Figure 1-3 The image shown is a preferred embodiment of the present invention.

[0025] The prefabricated semi-cylindrical steel mold used for construction of interlocking piles with variable cross-section semi-circular support includes a steel mold body 1. The steel mold body 1 is composed of a back plate 9, arc-shaped ribs 2 and a central web plate 3. The central web plate 3 is welded to the center of the back plate 9. Several arc-shaped ribs 2 are welded to the central web plate 3 and the bottom plate 4 at intervals along the axial direction. The same semi-circular plate 8 is welded to the several arc-shaped ribs 2. Several straight ribs 5 are welded to the semi-circular plate 8 at intervals along the axial direction. The bottom plate 4 is welded to the back plate 9. The edge of the bottom plate 4 away from the back plate 9 is welded to the edge of the semi-circular plate 8.

[0026] The steel formwork body 1, constructed by welding together the arc-shaped rib plate 2, central web plate 3, bottom plate 4, back plate 9, and semi-circular plate 8, can be vertically inserted into the hole by tightly adhering to the side wall of the pile hole during the casting of the interlocking pile. It is then combined with the upper semi-circular reinforcing cage to form an integral structure. After the steel formwork is precisely positioned and fixed at the hole opening, the pile body concrete is poured. After the concrete has initially set, the steel formwork body 1 is pulled out, and the lower circular and top semi-circular variable cross-section interlocking piles are poured in one go. This eliminates the need to remove the pile body concrete of the upper semi-circular pile of the circular pile, achieving efficient construction, reliable quality, and environmental protection. The cooperation between the central web plate 3 and the straight rib plate 5 ensures the overall structural strength of the steel formwork body 1, preventing it from easily deforming.

[0027] Specifically, in this embodiment, the central web plate 3 and the back plate 9 are perpendicular to each other, and both the central web plate 3 and the back plate 9 are provided with through holes 6.

[0028] The through hole 6 allows for easy hoisting of the steel mold body 1 by passing a steel rope through the through hole 6.

[0029] Specifically, in this embodiment, the center line of the semicircular plate 8 and the two long sides of the semicircular plate 8 are welded to the central web plate 3 and the back plate 9 respectively, which can ensure the sealing of the steel mold body 1 and facilitate subsequent demolding.

[0030] Specifically, in this embodiment, multiple straight ribs 5 are divided into two groups by the central web 3. The two groups of straight ribs 5 are symmetrical to each other. The multiple groups of straight ribs 5 can support the semi-circular plate 8 from the inside, improve the structural strength of the steel mold body 1, and reduce the risk of deformation of the steel mold body 1.

[0031] Specifically, in this embodiment, a plurality of weight-reducing grooves 7 are provided on the central web plate 3, and the plurality of weight-reducing grooves 7 are distributed at intervals along the axial direction.

[0032] By setting the weight reduction groove 7, the load-bearing strength of the central web plate 3 can be guaranteed while achieving the purpose of weight reduction.

[0033] Specifically, in this embodiment, the main body 1 of the steel mold is made of Q235 steel and the distance between the main bodies of the steel mold is 980mm.

[0034] Specifically, in this embodiment, the end of the central web plate 9 away from the through hole 6 is welded to the base plate 4, and the central web plate 9 and the base plate 4 are perpendicular to each other.

[0035] Specifically, in this embodiment, the ends of the multiple straight ribs 5 away from the semicircular plate 8 are all welded to the back plate 9. The straight ribs 5 and the back plate 9 have a certain angle, which can better transmit the force received by the semicircular plate 8 to the back plate 9, and avoid concentrated force affecting the service life.

[0036] Specifically, in this embodiment, the length of the back plate 9 is 565mm and the width of the back plate 9 is 1000mm.

[0037] Specifically, in this embodiment, the height of the central web plate 3 is 482mm, and the outer side of the welded parts of the steel mold body 1 is polished to ensure the smoothness of the semicircular plate 8 and the back plate 9 of the steel mold body 1, so as to facilitate the lowering and pulling of the steel mold body 1 into the hole.

[0038] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A prefabricated semi-cylindrical steel mold for construction of interlocking piles with variable cross-section semi-circular support, characterized in that, The system includes a steel mold body, which is composed of a back plate, arc-shaped ribs, and a central web plate. The central web plate is welded to the center of the back plate. Several arc-shaped ribs are welded to the central web plate and the bottom plate at axial intervals. The same semicircular plate is welded to the several arc-shaped ribs. Several straight ribs are welded to the semicircular plate at axial intervals. The bottom plate is welded to the back plate, and the edge of the bottom plate away from the back plate is welded to the edge of the semicircular plate.

2. The prefabricated semi-cylindrical steel mold for construction of interlocking piles with variable cross-section semi-circular support as described in claim 1, characterized in that, The central web plate and the back plate are perpendicular to each other, and both the central web plate and the back plate are provided with through holes.

3. The prefabricated semi-cylindrical steel mold for construction of interlocking piles with variable cross-section semi-circular support as described in claim 1, characterized in that, The centerline of the semicircular plate and its two long sides are welded to the central web plate and the back plate, respectively.

4. The prefabricated semi-cylindrical steel mold for construction of interlocking piles with variable cross-section semi-circular support as described in claim 1, characterized in that, Multiple straight ribs are divided into two groups by the central web, and the two groups of straight ribs are symmetrical to each other.

5. The prefabricated semi-cylindrical steel mold for construction of interlocking piles with variable cross-section semi-circular support as described in claim 1, characterized in that, The central web is provided with multiple weight-reducing grooves, which are distributed at intervals along the axial direction.

6. The prefabricated semi-cylindrical steel mold for construction of interlocking piles with variable cross-section semi-circular support as described in claim 1, characterized in that, The main body of the steel mold is made of Q235 steel and the distance between the main bodies of the steel mold is 980mm.

7. The prefabricated semi-cylindrical steel mold for construction of interlocking piles with variable cross-section semi-circular support as described in claim 1, characterized in that, The end of the central web away from the through hole is welded to the base plate, and the central web and the base plate are perpendicular to each other.

8. The prefabricated semi-cylindrical steel mold for construction of interlocking piles with variable cross-section semi-circular support as described in claim 1, characterized in that, The ends of the multiple straight ribs away from the semicircular plate are all welded to the back plate, and there is a certain angle between the straight ribs and the back plate.

9. The prefabricated semi-cylindrical steel mold for construction of interlocking piles with variable cross-section semi-circular support as described in claim 1, characterized in that, The back panel is 565mm long and 1000mm wide.

10. The prefabricated semi-cylindrical steel mold for construction of interlocking piles with variable cross-section semi-circular support as described in claim 1, characterized in that, The height of the central web plate is 482mm, and the outer side of the welded parts of the steel mold body is all polished.

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