CN214940192U

CN214940192U - Supporting construction of PHC tubular pile

Info

Publication number: CN214940192U
Application number: CN202120578097.XU
Authority: CN
Inventors: 李征宇; 刘钊; 孔宪勇; 艾晨; 朱峻齐; 王鑫; 徐远东
Original assignee: Wuhan Construction Engineering Co Ltd
Current assignee: Wuhan Construction Engineering Co Ltd
Priority date: 2021-03-22
Filing date: 2021-03-22
Publication date: 2021-11-30
Anticipated expiration: 2031-03-22

Abstract

The utility model discloses a supporting construction of PHC tubular pile, including the bed course, hat the roof beam, prefabricated a section of thick bamboo and PHC tubular pile of protecting has a plurality ofly, the number of prefabricated a section of thick bamboo and PHC tubular pile of protecting equals, a plurality of prefabrication is protected a section of thick bamboo and is all vertically placed in the foundation ditch, the equal vertical setting of a plurality of PHC tubular piles, a plurality of PHC tubular piles all are fixed in the foundation ditch, the prefabrication that each PHC tubular pile is located the part of foundation ditch bottom top corresponds protects a section of thick bamboo, and each PHC tubular pile is coaxial with the prefabricated a section of thick bamboo that protects that corresponds, the bed course is pour with the foundation ditch bottom on, hat the roof beam is constructed on the bed course, a plurality of prefabrication protect a section of thick bamboo is laid along the equidistant length direction of hat the roof beam, and each prefabrication protects a section of thick bamboo and bury the bed course and hat the roof beam underground, each prefabrication is equipped with the steel reinforcement cage, the lower part of each prefabrication of each steel reinforcement cage inserts in the PHC tubular pile that corresponds, prefabricated a section of protecting, it has pour the core concrete to fill in a section of protecting and the steel reinforcement cage.

Description

Supporting construction of PHC tubular pile

Technical Field

The utility model relates to a PHC tubular pile struts technical field, concretely relates to supporting construction of PHC tubular pile.

Background

With the popularization of PHC tubular piles, tubular piles are more and more widely applied to foundation pit supporting design, the construction sequence of the traditional tubular pile supporting structure is that hammering pile sinking is firstly carried out, pile heads are broken off, cushion layers are poured, crown beams are poured, and finally continuous waterproof curtain construction is carried out on the peripheries of the crown beams.

The construction structure form is designed, and the pile head needs to be processed. The pile head is broken, so that the cost is increased, the pile head of the PHC tubular pile is greatly damaged, and meanwhile, the continuous waterproof curtain construction is wasted in places where partial underground water is not abundant.

Disclosure of Invention

In order to solve the problem that above-mentioned prior art exists, the utility model provides a supporting construction of PHC tubular pile, this simple structure has increased prefabricated a section of thick bamboo that protects, can pour earlier the crown beam, carries out PHC again and struts the tubular pile construction, carries out the high pressure through reserving the hole at last and spouts the construction soon between stake soil.

Realize the utility model discloses the technical scheme that above-mentioned purpose adopted does:

the utility model provides a supporting construction of PHC tubular pile, including the bed course, hat the roof beam, prefabricated a plurality of and PHC tubular pile that protect, the number of prefabricated a plurality of protect equals with the PHC tubular pile, a plurality of prefabricated a plurality of protect all vertical places in the foundation ditch, a plurality of PHC tubular piles all vertical settings, a plurality of PHC tubular piles are all fixed in the foundation ditch, each PHC tubular pile is located the prefabricated a section of thick bamboo that corresponds of foundation ditch bottom top, and each PHC tubular pile is coaxial with the prefabricated a section of thick bamboo that protects that corresponds, the bed course is pour with the foundation ditch bottom on, hat the roof beam is constructed on the bed course, a plurality of prefabricated a plurality of protect a section of thick bamboo and are laid equidistantly along the length direction of hat the roof beam, and each prefabricated a section of protecting is buried underground in bed course and hat the roof beam, lay the steel reinforcement cage in each prefabricated a plurality of protecting, the lower part of each steel reinforcement cage inserts in the corresponding PHC tubular pile, it has pour the core concrete to protect in a plurality of prefabricated a section of thick bamboo and the steel reinforcement cage.

The construction method is characterized by further comprising a plurality of reserved pipes for construction by using a high-pressure jet grouting method, wherein the reserved pipes are arranged vertically, the reserved pipes are fixed to the bottom of the pit at equal intervals, the reserved pipes and the prefabricated pile casings are alternately arranged, and the high-pressure jet grouting pile is constructed at the bottom of the pit.

The reinforcement cage is trumpet-shaped, and the diameter of the upper port of the reinforcement cage is larger than that of the lower port of the reinforcement cage.

The lower port of the steel reinforcement cage is provided with a supporting plate which is disc-shaped.

Two through holes are symmetrically arranged at the upper part of the prefabricated protective cylinder.

The height of the prefabricated pile casing is equal to the sum of the thickness of the cushion layer and the height of the crown beam.

Compared with the prior art, the invention has the beneficial effects and advantages that:

1. this structure has set up prefabricated a section of thick bamboo that protects, need not break out and pile extension etc. to PHC tubular pile head when the construction, not only can not lead to the fact the harm to PHC support tubular pile, has improved construction quality, has practiced thrift the time limit for a project moreover.

2. This structure has set up the reservation pipe, carries out the construction of high pressure jet grouting pile through the reservation pipe, has only handled soil between the stake, compares and carries out continuous stagnant water curtain construction structural style at stake rear side, can practice thrift the cost.

Drawings

Fig. 1 is a schematic structural view of a supporting structure of a PHC pile.

Fig. 2 is a sectional view taken along the line a-a in fig. 1.

Wherein, 1-cushion layer, 2-crown beam, 3-prefabricated pile casing, 4-PHC tubular pile, 5-reinforcement cage, 6-reserved pipe, 7-supporting plate and 8-perforation.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

The structure of the supporting structure of the PHC pile provided by this embodiment is shown in fig. 1, and includes a cushion layer 1, a crown beam 2, a prefabricated pile casing 3, a PHC pile 4, and a reserved pipe 6.

The size of the prefabricated pile casing 3 is prefabricated according to the size of the PHC tubular pile, the inner diameter of the PHC tubular pile is about 100mm larger than that of the PHC tubular pile, and the height of the prefabricated pile casing 3 is equal to the sum of the thickness of the cushion layer 1 and the height of the crown beam 2. In this embodiment, the wall thickness of the prefabricated casing 3 is 4cm, the inner diameter is 600mm, and the volume is 0.52m³The weight is about 65 kg. Prefabricated a tub upper portion symmetry is equipped with two perforation 8, and in this embodiment, the fenestrate diameter is 28mm, because prefabricated a tub of weight is heavier, can use 25 mm's reinforcing bar as lifting the thick stick by two workman to lift up prefabricated a tub, adjusts the position of prefabricated a tub, ensures that the position of prefabricated a tub is placed the accuracy to guarantee that the construction location of PHC tubular pile is accurate.

The reserved pipe 6 is used for construction by a high-pressure jet grouting method, the reserved pipe 6 is a PVC pipe, the length of the reserved pipe 6 is 1-2cm larger than the diameter of a drill rod of a drilling machine, and the drill rod can smoothly pass through the reserved pipe.

Prefabricated a section of thick bamboo 3, reserved pipe 6 and PHC tubular pile 4 have a plurality ofly, and the number of prefabricated a section of thick bamboo 3 and PHC tubular pile 4 of protecting equals, and a plurality of prefabricated a section of thick bamboos 3 are vertical places in the foundation ditch, and the equal vertical setting of a plurality of PHC tubular piles 4, a plurality of PHC tubular piles 4 all are fixed in the foundation ditch, and the prefabricated a section of thick bamboo 3 that protects that the part that each PHC tubular pile 4 is located foundation ditch bottom top corresponds, and each PHC tubular pile 4 is coaxial with the prefabricated a section of thick bamboo 4 that protects that corresponds. A plurality of reservation pipes 6 are all vertical, and a plurality of reservation pipes 6 are equidistant to be fixed in on the pit bottom, and reservation pipe 6 and prefabricated protecting section of thick bamboo 3 are laid in turn.

After the prefabricated pile casing 3, the PHC tubular pile 4 and the reserved pipe 6 are arranged, a cushion layer 1 is poured on the bottom of the foundation pit, and a crown beam 2 of a reinforced concrete structure is constructed on the cushion layer 1. After the cushion layer 1 and the crown beam 2 are constructed, each prefabricated pile casing 3 is embedded in the cushion layer 1 and the crown beam 2, the prefabricated pile casings 3 are arranged at equal intervals along the length direction of the crown beam 2, and the part of the reserved pipe 6 positioned at the upper part of the foundation pit is embedded in the cushion layer 1 and the crown beam 2.

And a reinforcement cage 5 is arranged in each prefabricated protective cylinder 3, and the lower part of each reinforcement cage 5 is inserted into the corresponding PHC tubular pile 4. The reinforcement cage 5 is trumpet-shaped, the diameter of the upper port of the reinforcement cage 5 is larger than that of the lower port thereof, the lower port of the reinforcement cage 5 is provided with a supporting plate 7, and the supporting plate 7 is disc-shaped. The diameter of each supporting plate 7 is matched with the inner diameter of the PHC tubular pile 4, and each supporting plate 7 is positioned in the corresponding PHC tubular pile 4. And core filling concrete higher than the crown beam by one grade is poured in the prefabricated pile casing 3 and the reinforcement cage 5.

And finally, constructing the high-pressure jet grouting pile through the reserved pipe 6 by adopting a high-pressure jet grouting method, wherein the high-pressure jet grouting pile is used for isolating water in the cushion layer and the foundation pit soil layer and avoiding damages such as seepage.

Claims

1. The utility model provides a supporting construction of PHC tubular pile which characterized in that: the prefabricated pile casing and the PHC tubular pile are multiple, the number of the prefabricated pile casing and the number of the PHC tubular pile are equal, the prefabricated pile casing and the PHC tubular pile are all vertically placed in a foundation pit, the plurality of the prefabricated pile casing and the plurality of the PHC tubular pile are all vertically arranged, the plurality of the PHC tubular piles are all fixed in the foundation pit, the prefabricated pile casing corresponding to the part, above the bottom of the foundation pit, of each PHC tubular pile is coaxial with the corresponding prefabricated pile casing, the foundation pit and the bottom of the foundation pit are poured, the crown beam is constructed on the foundation pit, the prefabricated pile casings are arranged at equal intervals along the length direction of the crown beam, the prefabricated pile casings are embedded in the foundation pit and the crown beam, reinforcing cages are distributed in the prefabricated pile casings, the lower parts of the reinforcing cages are inserted into the corresponding PHC tubular piles, and filling concrete is poured in the prefabricated pile casings and the reinforcing cages.

2. The foundation pit supporting structure of PHC tubular pile of claim 1, characterized in that: the construction method is characterized by further comprising a plurality of reserved pipes for construction by using a high-pressure jet grouting method, wherein the reserved pipes are arranged vertically, the reserved pipes are fixed to the bottom of the pit at equal intervals, the reserved pipes and the prefabricated pile casings are alternately arranged, and the high-pressure jet grouting pile is constructed at the bottom of the pit.

3. The foundation pit supporting structure of PHC tubular pile of claim 1, characterized in that: the reinforcement cage is trumpet-shaped, and the diameter of the upper port of the reinforcement cage is larger than that of the lower port of the reinforcement cage.

4. The foundation pit supporting structure of PHC tubular pile of claim 1, characterized in that: the lower port of the steel reinforcement cage is provided with a supporting plate which is disc-shaped.

5. The foundation pit supporting structure of PHC tubular pile of claim 1, characterized in that: two through holes are symmetrically arranged at the upper part of the prefabricated protective cylinder.

6. The foundation pit supporting structure of PHC tubular pile of claim 1, characterized in that: the height of the prefabricated pile casing is equal to the sum of the thickness of the cushion layer and the height of the crown beam.