Structure for conveniently removing over-cast pile head of cast-in-place pile

Abstract

The utility model provides a cast-in-place pile structure convenient to dismantle an over-pouring pile head, which comprises a cast-in-place pile and an over-pouring structure, the over-pouring structure is located above the cast-in-place pile, the cast-in-place pile comprises a pile body and a reinforcement cage, the reinforcement cage is located in the pile body of the cast-in-place pile, the over-pouring structure comprises an over-pouring pile body, a chiseling hanging net and an isolation sleeve, and the chiseling hanging net is located in the pile body of the cast-in-place pile. The top of the reinforcement cage is located in an over-pouring pile body of the over-pouring structure, the top of the reinforcement cage is sleeved with the isolation sleeve, and the chiseling hanging net is located in the over-pouring pile body. The separation mesh is arranged at the segmentation position of the over-pouring structure and the cast-in-place pile, when the over-pouring structure is chiseled, the separation mesh can play a role in segmenting the over-pouring structure and the cast-in-place pile, the chiseling work amount and the labor intensity are greatly reduced, the steel bars are protected and isolated through the isolation sleeve, and the chiseling efficiency is improved. And the reinforcing steel bars can be conveniently pulled out of the over-pouring structure, so that the overall removal of the over-pouring structure is realized.

Description

Technical Field

[0001] The utility model relates to the field of cast-in-place pile construction, in particular to a cast-in-place pile head structure for convenient removal of overcast piles. Background Art

[0002] When constructing bored piles, it is generally necessary to over-cast by 0.5-1m to ensure the concrete strength of the bored pile body. After the pile body solidifies, the over-cast part needs to be chiseled out. The conventional chiseling method is manual chiseling with a jackhammer, which has the problems of high construction intensity and low efficiency. Moreover, chiseling out the reserved steel bars from the concrete will not only affect the strength of the steel bars, but also make chiseling more difficult. Similarly, the steel bars after chiseling are difficult to completely clean. If they are not rinsed clean, it will affect the bonding between the concrete and the steel bars, posing a hidden danger to the structural safety. Therefore, a construction method such as that disclosed in CN213774122U has emerged, in which a protective sleeve is set on the steel bars to protect the steel bars, and the difficulty of chiseling is reduced to a certain extent. However, the chiseling construction of the entire over-cast part is still relatively cumbersome, and the amount of chiseling work is still large. The utility model provides a convenient removal of the over-cast pile head structure for bored piles to solve the above problems. Utility Model Content

[0003] The utility model provides a convenient dismantling structure of an over-cast pile head for a bored pile, wherein a separation mesh is provided to reduce the difficulty of chiseling the over-cast part, thereby achieving overall removal of the over-cast part and improving work efficiency.

[0004] The technical solution adopted by the present invention to solve the above technical problems is:

[0005] A structure for conveniently dismantling an overcast pile head of a bored pile comprises a bored pile and an overcast structure, wherein the overcast structure is located above the bored pile, the bored pile comprises a pile body and a reinforcement cage, the reinforcement cage is located within the bored pile body, the overcast structure comprises an overcast pile body, a chiseling hanging net, and an isolation sleeve, the top of the reinforcement cage is located within the overcast pile body of the overcast structure, the isolation sleeve is sleeved on the top of the reinforcement cage, and the chiseling hanging net is located within the overcast pile body;

[0006] The chiseling hanging net includes a separation mesh, a hanging bar and a fixing bar. The separation mesh is located in the over-cast pile body. The bottom end of the hanging bar is connected to the separation mesh, and the top end extends out of the over-cast pile body. One end of the fixing bar is connected to the separation mesh, and the other end is connected to the isolation sleeve.

[0007] Furthermore, the isolation sleeve includes a protective sleeve, a protective sleeve head and a protective belt. The protective sleeve head is located at the top of the protective sleeve and at the top of the steel cage. The protective belt is located at the bottom of the protective sleeve and is wrapped around the protective sleeve and the steel cage.

[0008] Furthermore, the protective sleeve head is fixedly connected to the protective sleeve through a protective belt.

[0009] Furthermore, the separation mesh is arranged horizontally and is located at the pile top elevation, and the hanger bar is arranged vertically.

[0010] Furthermore, a hanging ring is provided at the top of the hanging rod.

[0011] Preferably, the separation mesh is formed by welding plain round steel bars.

[0012] Preferably, the protective sleeve and the protective sleeve head are PVC tubes, and the protective tape is an adhesive tape.

[0013] The beneficial effects of the utility model are as follows:

[0014] A separation mesh is set at the dividing position of the over-cast structure and the bored piles. When the over-cast structure is chiseled out, the separation mesh can play the role of dividing the over-cast structure and the bored piles, greatly reducing the chiseling workload and labor intensity. In addition, the isolation sleeve protects and isolates the steel bars, making it convenient to extract the steel bars from the over-cast structure, thereby realizing the overall removal of the over-cast structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the chiseling, hanging and isolation sleeve settings of the utility model;

[0017] Figure 3 This is a schematic diagram of the chiseling and hanging net structure of the utility model;

[0018] Figure 4 This is a schematic diagram of the isolation sleeve of the present utility model.

[0019] Figure numerals: 1. Pile body; 2. Steel cage; 3. Over-cast pile body; 4. Chiseled hanging net; 41. Separation mesh; 42. Hanging bar; 43. Fixing bar; 5. Isolation sleeve; 51. Protective sleeve; 52. Protective sleeve head; 53. Protective belt. DETAILED DESCRIPTION

[0020] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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.

[0021] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings and are only used to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed or operated in a specific direction.

[0022] like Figure 1 、 2 As shown, in the existing construction scheme of using protective sleeves to protect steel bars, it is possible to effectively prevent the steel bars from adhering to the concrete. After cutting the pile head, the steel bars can be directly pulled out of the pile head. However, during actual construction, the cutting of the pile head is more difficult due to the limitation of the steel bars. The pile body outside the steel bars is easy to cut, but the pile body core inside the steel bars accounts for a large proportion and cannot be cut. Construction can only be carried out by manual chiseling. It is impossible to conveniently separate the over-cast pile body 3 from the pile body of the bored pile. Moreover, in order to ensure the density of the pile body of the bored pile, a separation structure cannot be set between the pile body of the bored pile and the over-cast pile body. If a separation device such as a partition is set, if the area of ​​the partition is small, it cannot play an isolation role. If the area of ​​the partition is large, it is easy to cause the pile body of the bored pile below the partition to be not up to standard when pouring concrete. Safety hazards. Therefore, there is currently no good means to both ensure the pouring quality of the bored pile body and effectively reduce the difficulty of separating the over-cast pile body.

[0023] like Figure 1 、 2 As shown in Figure 3, a specific embodiment of the utility model is a convenient dismantling over-cast pile head structure for bored piles, comprising a bored pile and an over-cast structure, wherein the over-cast structure is located above the bored pile, the bored pile comprises a pile body 1 and a steel cage 2, the steel cage 2 is located in the pile body 1 of the bored pile, the over-cast structure comprises an over-cast pile body 3, a chiseling hanging net 4 and an isolation sleeve 5, the top of the steel cage 2 is located in the over-cast pile body 3 of the over-cast structure, the isolation sleeve 5 is sleeved on the top of the steel cage 2, the chiseling hanging net 4 is located in the over-cast pile body 3; the chiseling hanging net 4 comprises a separation mesh 41, a hanging bar 42 and a fixing bar 43, the separation mesh 41 is located in the over-cast pile body 3, the bottom end of the hanging bar 42 is connected to the separation mesh 41, and the top end extends out of the over-cast pile body 3, one end of the fixing bar 43 is connected to the separation mesh 41, and the other end is connected to the isolation sleeve 5.

[0024] The implementation principle of the present invention is to set a separation mesh 41 at the separation position of the over-cast pile body 3 and the pile body of the bored pile. The separation mesh 41 is a steel mesh with a large gap welded by smooth round steel bars. The separation mesh 41 is fixed to the isolation sleeve 5 by fixing ribs 43 to achieve fixation, and is horizontally set at the separation position of the over-cast pile body 3 and the pile body of the bored pile, that is, the pile top elevation position. When pouring concrete, the steel mesh does not affect the passage of concrete, nor does it affect the compaction of concrete, so it does not affect the casting density of the bored pile body. However, when the over-cast pile body 3 is chiseled, the steel mesh formed by the horizontal arrangement of smooth round steel bars is beneficial to separating the over-cast pile body 3 from the pile body of the bored pile. The smooth round steel bars have low adhesion to concrete, and when chiseled or pried again, the smooth round steel bars will not be Cracks are easily formed between the steel bars and the concrete, and the cracks are more likely to extend along the steel bars. Therefore, when chiseling or prying, the steel mesh formed by the smooth round steel bars is more conducive to the formation of horizontal cracks between the over-cast pile body 3 and the pile body of the bored pile; when chiseling, the concrete on the outside of the steel cage 2 is cut and chiseled, and then chiseled and pried. The low bonding strength between the smooth round steel bars and the concrete can be used to more easily separate the over-cast pile body 3 from the pile body of the bored pile. At the same time, the isolation sleeve 5 is used to isolate the steel bars on the upper part of the steel cage from the over-cast pile body 3, which reduces the adhesion strength between the steel bars and the over-cast pile body 3 and is more convenient for the overall removal of the over-cast structure. Compared with the construction method of gradually chiseling the over-cast pile body 3, the construction method of overall removal of the over-cast pile body 3 can effectively reduce the workload.

[0025] like Figure 2 As shown, further, the separation mesh 41 is located on the inner side of the vertical steel bars at the top of the steel cage and is horizontally arranged at the pile top elevation position. When the over-cast pile body 3 is chiseled, the separation mesh 41 is located in the over-cast pile body 3 and is removed together; when the separation mesh 41 is placed, it is located above the pile top elevation line. During construction, cutting and chiseling are performed from the pile top elevation line. At this time, the separation mesh 41 is located in the over-cast pile body 3. After the concrete on the outside of the vertical steel bars at the top of the steel cage is cut, a crowbar or electric equipment is used to directly pry along the cut seam according to the diameter of the pile body, or a hole is drilled and pried to form a horizontal crack. At the same time, the crane is connected by the lifting ring on the lifting rod 42. After the horizontal crack is formed, the crane lifts the over-cast pile body 3 and the chiseling hanging mesh 4 and the isolation sleeve 5 inside it together to separate them from the pile body 1 of the cast-in-place pile.

[0026] like Figure 4As shown, further, the isolation sleeve 5 includes a protective sleeve 51, a protective sleeve head 52 and a protective belt 53. The protective sleeve head 52 is located at the top of the protective sleeve 51 and at the top of the steel cage 2. The protective sleeve head 52 plays a role in fixing the protective sleeve 51. The protective belt 53 is located at the bottom of the protective sleeve 51 and is wrapped around the protective sleeve 51 and the steel cage 2. The protective sleeve head 52 and the protective belt 53 seal the upper and lower ends of the protective sleeve 51 to prevent concrete from being poured from the upper and lower ends of the protective sleeve 51, thereby protecting and isolating the steel bars in the over-cast pile body 3.

[0027] Furthermore, the protective sleeve head 52 is fixedly connected to the protective sleeve 51 through a protective belt 53 .

[0028] Furthermore, the hanging rod 42 is arranged vertically, and a lifting ring is provided at the top of the hanging rod 42, which is used to connect a crane. The fixing rod 43 is used to fix the separation mesh 41. The separation mesh 41 needs to be fixed at the pile top elevation line. The fixing rod 43 fixes the separation mesh 41 on the protective sleeve 51, and the protective sleeve 51 is used to fix the separation mesh 41 at the pile top elevation position.

[0029] Furthermore, preferably, the separation mesh 41 is welded with plain round steel bars to reduce the adhesion strength to the overcast pile body 3, and the hanger bars 42 and the fixing bars 43 are both ribbed steel bars to increase the adhesion strength to the overcast pile body 3; for cast-in-place piles with smaller pile diameters, wire ties can be used for the fixing bars 43.

[0030] Preferably, the protective sleeve 51 and the protective sleeve head 52 are PVC tubes, and the protective tape 53 is an adhesive tape. The protective sleeve 51 and the protective sleeve head 52 are connected and sealed by the adhesive tape, and the bottom end of the protective sleeve 51 is sealed.

[0031] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description. It is intended that all variations within the meaning and range of equivalents of the claims be encompassed within the present invention, and any reference numerals in the claims should not be construed as limiting the claims to which they relate.

Claims

1. A structure for convenient removal of overcast pile heads of cast-in-place piles, characterized by: The invention comprises a cast-in-place pile and an overcast structure, wherein the overcast structure is located above the cast-in-place pile, the cast-in-place pile comprises a pile body (1) and a steel cage (2), the steel cage (2) is located in the pile body (1) of the cast-in-place pile, the overcast structure comprises an overcast pile body (3), a chiseling hanging net (4) and an isolation sleeve (5), the top of the steel cage (2) is located in the overcast pile body (3) of the overcast structure, the isolation sleeve (5) is sleeved on the top of the steel cage (2), and the chiseling hanging net (4) is located in the overcast pile body (3); The chiseled hanging net (4) comprises a separation mesh (41), a hanging bar (42) and a fixing bar (43); the separation mesh (41) is located in the overcast pile body (3); the bottom end of the hanging bar (42) is connected to the separation mesh (41), and the top end extends out of the overcast pile body (3); one end of the fixing bar (43) is connected to the separation mesh (41), and the other end is connected to the isolation sleeve (5).

2. The structure for conveniently removing the overcast pile head of a bored pile according to claim 1 is characterized in that: The isolation sleeve (5) comprises a protective sleeve (51), a protective sleeve head (52) and a protective belt (53); the protective sleeve head (52) is located at the top of the protective sleeve (51) and at the top of the steel cage (2); the protective belt (53) is located at the bottom of the protective sleeve (51) and is wound around the protective sleeve (51) and the steel cage (2).

3. The structure for conveniently removing the overcast pile head of a bored pile according to claim 2, characterized in that: The protective sleeve head (52) is fixedly connected to the protective sleeve (51) via a protective belt (53).

4. The structure for conveniently removing an overcast pile head of a cast-in-place pile according to claim 1 is characterized in that: The separation mesh (41) is arranged horizontally and is located at the pile top elevation, and the suspension rod (42) is arranged vertically.

5. The structure for conveniently removing the overcast pile head of a bored pile according to claim 1 is characterized by: The top of the suspension rod (42) is provided with a suspension ring.

6. The structure for conveniently removing an overcast pile head of a bored pile according to claim 1 is characterized by: The separation mesh (41) is formed by welding round steel bars.

7. The structure for conveniently removing an overcast pile head of a bored pile according to claim 2, wherein: The protective sleeve (51) and the protective sleeve head (52) are PVC tubes, and the protective tape (53) is an adhesive tape.

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