Precast square pile inserting connector

Abstract

The utility model discloses a prefabricated square pile plug connector which specifically comprises an upper connector assembly and a lower connector assembly which are detachably connected with each other, the upper connector assembly comprises an upper concrete protection layer and an upper plug connector, and the lower connector assembly comprises a lower concrete protection layer and a lower bell and spigot. The upper concrete protection layer wraps the peripheral wall of the upper inserting head, and the lower concrete protection layer wraps the peripheral wall of the lower bell and spigot joint. And the upper concrete protection layer and the lower concrete protection layer completely cover the peripheral walls of the connected upper joint assembly and lower joint assembly. The upper connector assembly and the lower connector assembly are detachably connected, so that pile splicing efficiency is improved, and meanwhile, the problem that the square pile splicing connector is rusted is effectively prevented by arranging the upper concrete protection layer and the lower concrete protection layer.

Description

Technical Field

[0001] The utility model belongs to the technical field of building construction, in particular to a prefabricated square pile plug-in joint. Background Art

[0002] Soft soil and liquefied soil are widely distributed in China. Soft soil and liquefied soil have high water content, high compressibility and low foundation bearing capacity. Small-diameter prefabricated square piles do not require high equipment in the prefabrication site and are low in cost. They are a widely used soft soil and liquefied soil treatment technology. Due to the limitation of transportation and installation height, the length of small-diameter prefabricated square piles is usually about 3 meters. When the designed pile length is greater than 3 meters, it is often necessary to connect the piles at the construction site.

[0003] At present, small diameter prefabricated square piles are mainly constructed by end plate welding. The welding process takes a long time when connecting piles, which greatly reduces the efficiency of pile drivers and increases construction costs. In addition, the anti-corrosion effect is poor at the welded joints.

[0004] Therefore, it is urgent to propose a small-diameter square pile joint technology with fast construction speed, good anti-corrosion effect and high connection strength to overcome the above problems. Utility Model Content

[0005] The utility model aims to provide a prefabricated square pile plug-in joint to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, a technical solution adopted by the utility model is: a prefabricated square pile plug-in joint, comprising an upper joint assembly and a lower joint assembly that are detachably connected to each other, the upper joint assembly comprising an upper concrete protective layer and an upper plug-in joint, the lower joint assembly comprising a lower concrete protective layer and a lower socket, the upper concrete protective layer is coated on the outer peripheral wall of the upper plug-in joint, and the lower concrete protective layer is coated on the outer peripheral wall of the lower socket, when the upper joint assembly and the lower joint assembly are connected, the upper concrete protective layer and the lower concrete protective layer completely coat the outer peripheral walls of the connected upper joint assembly and the lower joint assembly.

[0007] Preferably, the upper plug connector comprises an elastic plate and a buckling portion arranged thereon, and the lower socket is provided with a clamping groove for clamping the buckling portion.

[0008] Preferably, an elliptical hole is further provided on the upper plug joint, and a baffle 1 is provided inside the upper plug joint for preventing concrete from overflowing from the upper joint assembly.

[0009] Preferably, a plurality of elastic plates are provided, and gaps exist between adjacent elastic plates.

[0010] Preferably, a socket grouting hole and a socket exhaust hole are provided on the lower socket, and a main grouting hole and a main exhaust hole which are respectively connected to the socket grouting hole and the socket exhaust hole are provided on the lower concrete protective layer.

[0011] Preferably, the elastic plate is provided with a plug joint grouting hole connected with the socket grouting hole.

[0012] Preferably, the lower socket includes a wall panel and a baffle plate 2, the wall panel forming the main body of the lower joint assembly, the baffle plate 2 is arranged in the main body of the lower joint assembly formed by the wall panel and is used to prevent concrete from overflowing from the lower joint assembly, and the slot is arranged inside the main body of the lower joint assembly formed by the wall panel.

[0013] Preferably, upper pile body reinforcement bars are fixed on the upper plug connector, and lower pile body reinforcement bars are fixed on the wall panel.

[0014] Preferably, the material of the upper concrete protective layer and the lower concrete protective layer includes one or more of resin, plastic, and rubber.

[0015] Beneficial effects of the utility model: the solution can effectively speed up the efficiency of pile connection by setting the upper joint assembly and the lower joint assembly to be detachable, compared with the time consumed by welding. At the same time, by setting the upper concrete protective layer and the lower concrete protective layer, the problem of rust on the square pile plug-in joint is effectively prevented;

[0016] Among them, by providing an elliptical hole on the upper plug connector, the cross section of the elastic plate is weakened, so that the elastic plate deforms inwards when inserted and resets outwards after being in place;

[0017] Wherein, by providing gaps between adjacent elastic plates, space can be reserved for the elastic plates to deform inwards when inserted;

[0018] Among them, the cooperation between the upper plug joint, the lower socket, the baffle plate 1 and the baffle plate 2 ensures the limitation of the concrete pouring space;

[0019] Among them, by setting the grouting holes and the exhaust holes, it can be ensured that the grouting material inside the joint fills the gap inside the joint during the later grouting;

[0020] Among them, the materials selected for the upper concrete protective layer and the lower concrete protective layer have excellent waterproof and anti-corrosion properties, which can effectively prevent the joints from being corroded. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model when connected;

[0022] Figure 2 It is a schematic diagram of the composition structure of the upper and middle joint assembly parts of the utility model;

[0023] Figure 3 It is a schematic diagram of the structure of the lower joint assembly of the utility model;

[0024] Figure 4 It is a cross-sectional view of the utility model when connected;

[0025] In the figure: 1. upper joint assembly accessories; 2. lower joint assembly accessories; 11. upper concrete protective layer;

[0026] 12. Upper plug joint; 121. Upper pile body reinforcement; 122. Elliptical hole; 123. Gap; 124. Elastic plate; 125. Fastening part; 126. Plug joint grouting hole; 127. Baffle 1; 21. Lower concrete protective layer; 22. Lower socket; 211. Grouting main hole; 212. Vent main hole; 220. Lower pile body reinforcement; 221. Wall plate; 222. Socket grouting hole; 223. Socket vent hole; 224. Slot; 227. Baffle 2. DETAILED DESCRIPTION

[0027] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0028] Example:

[0029] See also Figure 1 , Figure 2 , Figure 3 A prefabricated square pile plug-in joint, comprising an upper joint assembly 1 and a lower joint assembly 2 which are detachably connected to each other, the upper joint assembly 1 comprising an upper concrete protective layer 11 and an upper plug joint 12, the lower joint assembly 2 comprising a lower concrete protective layer 21 and a lower socket 22, the upper concrete protective layer 11 is coated on the outer peripheral wall of the upper plug joint 12, the lower concrete protective layer 21 is coated on the outer peripheral wall of the lower socket 22, when the joint assembly and the lower joint assembly 2 are connected, the upper concrete protective layer 11 and the lower concrete protective layer 21 completely coat the outer peripheral walls of the connected upper joint assembly 1 and the lower joint assembly 2.

[0030] See also Figure 4The upper plug connector 12 includes an elastic plate 124 and a buckle portion 125 arranged thereon, and a clamping groove 224 for clamping the buckle portion 125 is arranged on the lower socket 22. A plurality of elastic plates 124 are provided, and gaps 123 exist between adjacent elastic plates 124. An elliptical hole 122 is also provided on the upper plug connector 12, and a baffle 127 is provided in the upper plug connector 12 for preventing concrete from overflowing from the upper connector assembly 1.

[0031] The lower socket 22 includes a wall panel 221 and a baffle 227. The wall panel 221 forms the main body of the lower joint assembly 2. The baffle 227 is arranged in the main body of the lower joint assembly 2 formed by the wall panel 221 and is used to prevent concrete from overflowing from the lower joint assembly 2. The slot 224 is arranged inside the main body of the lower joint assembly 2 formed by the wall panel 221.

[0032] See also Figure 2 , Figure 3 A socket grouting hole 222 and a socket exhaust hole 223 are provided on the lower socket 22, and a main grouting hole 211 and an exhaust hole 212 which are respectively connected to the socket grouting hole 222 and the socket exhaust hole 223 are provided on the lower concrete protective layer 21. A plug joint grouting hole 126 which is connected to the socket grouting hole 222 is also provided on the elastic plate 124, wherein an upper pile body steel bar 121 is fixed to the upper plug joint 12, and a lower pile body steel bar 220 is fixed to the wall plate 221. In addition, the material of the upper concrete protective layer 11 and the lower concrete protective layer 21 includes one or more of resin, plastic, and rubber.

[0033] Working process and principle:

[0034] When using the square pile plug-in joint in this scheme, an upper plug-in joint 12 is placed at one end of the mold, and a lower socket 22 is placed at the other end. An upper pile body reinforcement 121 is welded to one end of the upper plug-in joint 12, and a lower pile body reinforcement 220 is welded to one end of the lower socket 22 away from the upper pile body reinforcement 121. Subsequently, the upper concrete protective layer 11 and the lower concrete protective layer 21 are respectively sleeved on the upper plug-in joint 12 and the lower socket 22. Affected by the materials of the upper concrete protective layer 11 and the lower concrete protective layer 21, they can produce a certain deformation, so they can be firmly covered on the upper plug-in joint 12 and the lower socket 22 to achieve The square pile plug-in joint is now protected, and then the concrete of the prefabricated square pile is poured. After the maintenance is completed, the small-diameter square pile is transported to the construction site, the first leading pile is put in place, the lower socket 22 is placed upward, the pile is vibrated to the pile top elevation of about 1m from the ground, and the pile sinking is stopped. The second pile is put in place, the upper plug-in joint 12 of the second pile is inserted into the lower socket 22 of the first leading pile, and the grouting material is injected through the grouting hole. When the grouting material flows out of the exhaust hole evenly, the grouting is stopped, and the second pile is vibrated to the pile top elevation of about 1m from the ground. The above operation is continued until the pile length reaches the designed length. At this point, the normal use of the square pile plug-in joint in this scheme is achieved.

[0035] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structural transformation made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, is also included in the patent protection scope of the present invention.

Claims

1. A prefabricated square pile plug-in joint, characterized in that: The invention comprises an upper joint assembly (1) and a lower joint assembly (2) which are detachably connected to each other, wherein the upper joint assembly (1) comprises an upper concrete protective layer (11) and an upper plug joint (12), and the lower joint assembly (2) comprises a lower concrete protective layer (21) and a lower socket (22), wherein the upper concrete protective layer (11) covers the outer peripheral wall of the upper plug joint (12), and the lower concrete protective layer (21) covers the outer peripheral wall of the lower socket (22); when the upper joint assembly (1) and the lower joint assembly (2) are connected, the upper concrete protective layer (11) and the lower concrete protective layer (21) completely cover the outer peripheral walls of the connected upper joint assembly (1) and the lower joint assembly (2).

2. A prefabricated square pile plug-in joint according to claim 1, characterized in that: The upper plug connector (12) comprises an elastic plate (124) and a buckling portion (125) arranged thereon, and the lower socket (22) is provided with a clamping groove (224) for clamping the buckling portion (125).

3. A prefabricated square pile plug-in joint according to claim 2, characterized in that: The upper plug joint (12) is also provided with an elliptical hole (122), and a baffle plate (127) is provided inside the upper plug joint (12) for preventing concrete from overflowing from the upper joint assembly.

4. A prefabricated square pile plug-in joint according to claim 2, characterized in that: A plurality of elastic plates (124) are provided, and gaps (123) exist between adjacent elastic plates (124).

5. The prefabricated square pile plug-in joint according to claim 2, characterized in that: The lower socket (22) is provided with a socket grouting hole (222) and a socket exhaust hole (223), and the lower concrete protective layer (21) is also provided with a grouting main hole (211) and an exhaust main hole (212) which are respectively connected to the socket grouting hole (222) and the socket exhaust hole (223).

6. A prefabricated square pile plug-in joint according to claim 5, characterized in that: The elastic plate (124) is provided with a plug joint grouting hole (126) which is connected to the socket grouting hole (222).

7. The prefabricated square pile plug-in joint according to claim 2, characterized in that: The lower socket (22) comprises a wall plate (221) and a second baffle plate (227); the wall plate (221) forms a main body of the lower joint assembly (2); the second baffle plate (227) is arranged inside the main body of the lower joint assembly (2) formed by the wall plate (221) and is used to prevent concrete from overflowing from the lower joint assembly; the clamping groove (224) is arranged inside the main body of the lower joint assembly (2) formed by the wall plate (221).

8. The prefabricated square pile plug-in joint according to claim 7, characterized in that: An upper pile body steel bar (121) is fixed to the upper plug connector (12), and a lower pile body steel bar (220) is fixed to the wall panel (221).

9. The prefabricated square pile plug-in joint according to claim 1, characterized in that: The material of the upper concrete protective layer (11) and the lower concrete protective layer (21) includes one or more of resin, plastic, and rubber.

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