CN210315516U

CN210315516U - Club-footed type tubular pile structure

Info

Publication number: CN210315516U
Application number: CN201920678263.6U
Authority: CN
Inventors: 贾书岭; 张兴; 师子刚; 王涛; 王东; 修彦吉
Original assignee: Zhongyan Technology Co Ltd
Current assignee: Zhongyan Technology Co Ltd
Priority date: 2019-05-13
Filing date: 2019-05-13
Publication date: 2020-04-14
Anticipated expiration: 2029-05-13

Abstract

The utility model discloses a club-footed type tubular pile structure relates to geotechnical engineering technical field. The concrete filling device comprises a steel pipe, wherein expanded concave parts and concave rings are formed on the lower end of the steel pipe and the inner wall surface of the bottom end of a pile hole, curing materials and concrete are sequentially filled in the steel pipe and in the range of the expanded concave parts and the concave rings from bottom to top, a pressurizing plate capable of moving up and down is arranged on the top surface of the concrete, an inner pipe is connected to the top surface of the pressurizing plate, the inner pipe is arranged on a fixed support on a pile pressing machine, the concrete is pressurized by the pile pressing machine through the pressurizing plate at the lower end of the inner pipe, so that the curing materials absorb water to expand, and the bottom-expanded pile end with the multistage diameter larger than that of the steel pipe is. The problems of low bearing capacity of the pile end and the occurrence of a construction process in the prior art can be effectively solved, so that the strength and the uplift resistance of the pile body are improved.

Description

Club-footed type tubular pile structure

Technical Field

The utility model relates to a geotechnical engineering technical field especially relates to a club-footed type tubular pile structure.

Background

The bearing pile can transmit all or part of the load of a building to a soil layer with better underground bearing performance so as to meet the requirements of bearing capacity and settlement, along with the rapid development of foundation construction implementation, the pile type with higher bearing capacity and the pile forming process are greatly used, the drilled pile and the steel pipe pile are two types of piles commonly used in the technical field of geotechnical engineering at present, a steel reinforcement cage needs to be placed in the construction process of the drilled pile, the construction process is complex, the construction period is longer, the construction cost is high, the phenomenon of pile breakage or necking is easy to occur, the bearing capacity of a pile end bearing layer is difficult to guarantee, in comparison, the steel pipe pile can be directly pressed into a soil body by a pile pressing machine, concrete is filled in the steel pipe or not filled in the steel pipe, and the construction is convenient, so the steel pipe pile is widely applied to the technical field of geotechnical engineering due to the advantages of high bearing capacity, wide. In the soft soil area, because the soft soil area has the characteristics such as the pore ratio is big, the moisture content is high, subside greatly, the steel-pipe pile is the uniform cross section linear type, the lateral resistance of uniform cross section steel-pipe pile is lower, and the pile end can't form the enlarged footing, it is difficult to guarantee pile lateral resistance and pile end bearing capacity to cause, the improvement of enlarged footing has been carried out to steel-pipe pile end at present, but the steel-pipe pile has the construction difficult quilt and is driven into the soil layer, construction speed is slow, the construction is loaded down with trivial details, can't promote the vertical bearing.

In view of the problems in the related art, no effective solution has been proposed at present.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an expand end type tubular pile structure to solve the above-mentioned problem that exists among the prior art.

In order to realize the purpose, the utility model discloses a technical scheme as follows:

a bottom-expanding type tubular pile structure comprises a steel pipe, wherein expanded concave parts and concave rings are formed on the surfaces of the lower end of the steel pipe and the inner wall of the bottom end of a pile hole, curing materials and concrete are sequentially filled in the steel pipe and the expanded concave parts and concave rings from bottom to top, a pressurizing plate capable of moving up and down is arranged on the top surface of the concrete, an inner pipe is connected to the top surface of the pressurizing plate, the inner pipe is installed on a fixed support on a pile pressing machine, the concrete is pressurized by the pile pressing machine through the pressurizing plate at the lower end of the inner pipe, so that the curing materials absorb water to expand, and the bottom-expanding type pile end with the diameter larger than that of the steel pipe is formed at the bottom end of the.

Preferably, the lower end concave part of the steel pipe and the solidified material extending out of the concave ring at the bottom end of the pile hole bite the bearing layer.

Preferably, the pile press pushes the inner pipe to press the concrete by the pressing plate, so as to press and solidify the material, and act on the bottom end of the pile hole to form a bottom-expanding pile end with a diameter larger than that of the steel pipe.

The utility model has the advantages that: the utility model provides an expand end type tubular pile is through inserting the steel pipe with the auger drill cooperation and locating in the ground, can reduce and insert the crowded soil effect that produces when establishing the steel pipe, insert the ground in the steel pipe is whole, and make concave part and concave ring form at steel pipe lower extreme and stake hole bottom internal side surface, through pouring into curing material and concrete in to the steel pipe, curing material produces the inflation, after the sclerosis and pack at steel pipe lower extreme and stake hole bottom internal side surface's concave part and concave ring scope, form the expand end type pile tip that the multistage diameter is greater than the steel pipe in stake hole bottom with predetermined interval, can strengthen the wholeness and the intensity of tubular pile, the bearing capacity and the withdrawal resistance of effectual improvement tubular pile, construction convenience.

Drawings

In order to better understand the technical solutions of the embodiments of the present invention, it should be noted that the following drawings only show some examples of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to these drawings without inventive efforts.

Fig. 1 is the embodiment of the present invention, which is a construction structure diagram of a pipe pile pouring and pressurizing concrete.

Fig. 2 is the embodiment of the utility model provides a tubular pile pore-forming construction structure chart.

Fig. 3 is the utility model provides a two tubular pile pore-forming construction structures diagrams.

Fig. 4 is the utility model provides a three tubular pile pore-forming construction structures diagrams.

Fig. 5 is a top view sectional view of the tubular pile a-a of the present invention.

Fig. 6 is a top sectional view of the tubular pile B-B of the present invention.

In the figure, the meaning of each symbol is as follows:

the steel pipe pile comprises a steel pipe 1, a pile pressing machine 2, a fixing support 21, an inner pipe 22, a pressurizing plate 23, a spiral drilling machine 3, a spiral blade 31, an expanding device 32, an expanding drill bit 33, a concave part 4, a concave ring 5, concrete 6, a curing material 7 and a pile hole 8.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the invention, are given by way of illustration only.

Embodiment one, as shown in fig. 1 and 2, the embodiment of the present invention provides a bottom-expanding type tubular pile structure, including a steel pipe 1, the lower end of the steel pipe 1 and the inner wall surface at the bottom end of a pile hole 8 form an expanded concave portion 4 and a concave ring 5, the inside of the steel pipe 1 and the expanded concave portion 4 and the concave ring 5 are sequentially filled with a curing material 7 and concrete 6 from bottom to top, the top surface of the concrete 6 is provided with a pressure plate 23 capable of moving up and down, the top surface of the pressure plate 23 is connected with an inner pipe 22, the inner pipe 22 is installed on a fixing support of a pile press 2, the pile press 2 applies pressure to the concrete 6 through the pressure plate 23 at the lower end of the inner pipe 22, so that the curing material 7 absorbs water to expand, and the curing material 7 hardens and forms a bottom-expanding type pile end with a multi-stage diameter larger than the steel pipe 1.

In a specific embodiment of the present invention, as shown in fig. 5 and 6, the inner wall surface of the lower end of the steel pipe 1 and the bottom end of the pile hole 8 forms an expanded concave portion 4 and a concave ring 5, the lower end of the steel pipe 1 forms an expanded concave portion 4, which is in a plum blossom shape, and the bottom end of the pile hole 8 forms an expanded concave ring 5, which is in an annular groove shape, wherein the concave portion 4 can be set in a plurality according to the design length of the steel pipe 1, and the concave ring 5 can be set in a plurality of circular concave rings 5 according to the distance between the bottom end of the steel pipe lower rectangular pile hole 8.

In a specific embodiment of the present invention, the interior of the steel pipe 1 and the expanded recess 4 and the expanded concave ring 5 are sequentially filled with the curing material 7 and the concrete 6 from bottom to top, wherein the curing material 7 absorbs water to expand and has a higher bearing capacity after being hardened.

In a specific embodiment of the present invention, the concave portion 4 of the lower end of the steel pipe 1 and the solidified material 7 extending from the concave ring 5 of the bottom end of the pile hole 8 bite the supporting layer into the concave portion, and the solidified material 7 forms the lower end of the steel pipe 1 and the bottom end of the pile hole 8 into a whole to increase the stability of the whole pile end.

In a specific embodiment of the present invention, the top surface of the pressure plate 23 is connected to the inner tube 22, the inner tube 22 is mounted on the fixing bracket of the pile press 2, the pressure plate 23 and the inner tube 22 can move up and down in the steel tube 1, wherein the pressure plate 23 and the inner tube 22 can be fixedly connected by means of heat welding, screw threads, etc.

In an embodiment of the present invention, the pile driver 2 pushes the inner tube 22 to press the pressing plate 23 to press the concrete 6, so as to press the curing material 7, and the bottom-expanded pile end with a diameter larger than that of the steel tube 1 is formed at the bottom of the pile hole 8, thereby further improving the bearing capacity of the pile end and the pull-out resistance of the pile body.

A construction process of a pedestal type pipe pile structure comprises the following steps:

s1, drilling machine lead hole: positioning the spiral drilling machine 3 accurately in place at the position of a pile hole according to the positioning of the tubular pile, placing the steel pipe 1 by using the spiral drilling machine 3, drilling by adopting a pipe following drilling method, and excavating to a preset depth on the inner side of the steel pipe 1 by rotating the spiral blade 31;

s2, pile end bottom expanding: after the spiral drilling machine 3 drills to a preset depth, a horizontal expanding drill bit 33 extends out of the expanding device 32, the spiral drilling machine 3 is started to form an expanded concave ring 5 on the inner wall surface of the bottom end of the pile hole 8, the expanding device 32 retracts into the horizontal expanding drill bit 33, the expanding device 32 is lifted to the lower end of the steel pipe 1, the expanding device 32 extends out of the horizontal expanding drill bit 33 again, the inner wall of the steel pipe 1 is extruded through the horizontal drill bit 33, and an expanded concave part 4 is formed on the inner wall surface of the steel pipe 1;

s3, cleaning holes: after the lower end of the steel pipe 1 and the concave part 4 and the concave ring 5 at the bottom end of the pile hole 8 are formed, cleaning the hole again by using the spiral drilling machine 3, and cleaning up the dregs at the bottom of the hole;

s4, filling: the concrete 6 is preferably used along with stirring, and the curing material 7 and the concrete 6 are sequentially filled from the top end of the inner pipe 22 to the interior of the steel pipe 1 and the expanded concave part 4 from bottom to top, wherein the curing material 7 is completely filled in the concave part 4 and the concave ring 5;

s5, pressurization: the inner pipe 22 is lifted slowly while pouring materials, meanwhile, the pile press 2 presses the concrete 6 through a pressure plate 23 on the inner pipe 22, further, the curing material 7 expands, and after hardening, a multi-stage bottom-expanding type pile end with the diameter larger than that of the steel pipe 1 is formed at the bottom end of the pile hole 8;

s6, maintenance: and after the concrete 6 is poured, maintaining the concrete until the concrete 6 is solidified and hardened.

Second embodiment, a bottom-expanded tubular pile structure, as shown in fig. 3, is similar to the first embodiment, and mainly differs in that expanded recesses 4 and recessed rings 5 are formed in the lower end of the steel pipe 1 and the inner wall surface of the bottom end of the pile hole 8, in the present embodiment, in the process of expanding the diameter of the pile end, an expanding device 32 is extended out of a horizontal expanding drill bit 33, a spiral drilling machine 3 is started to form the expanded recessed rings 5 on the inner wall surface of the bottom end of the pile hole 8, the bottom end of the pile hole 8 is continuously expanded to the lower end of the steel pipe 1 while slowly lifting up the expanding device 32, then the expanding device 32 is retracted into the horizontal expanding drill bit 33, the expanding device 32 is lifted up to the lower end of the steel pipe 1, the expanding device 32 is extended out of the horizontal expanding drill bit 33 again, the inner wall of the steel pipe 1 is pressed by the horizontal drill bit 33 at predetermined intervals, multi-stage expanded recesses 4 are formed on the inner wall surface, and a curing material 7 and concrete 6 are sequentially filled in the interior, the curing material 7 is completely filled in the range of the concave part 4 and the concave ring 5, the pile press 2 presses the concrete 6 through a pressure plate at the lower end of the inner pipe 22, and further presses the curing material 7, the material pouring and the pressure pressing are carried out simultaneously, so that the curing material 7 absorbs water to expand and has higher bearing capacity, and after being hardened, the curing material acts on the bottom end of the pile hole 8 to form a bottom-expanding type pile end with the diameter larger than that of the steel pipe 1.

Third embodiment, a bottom-expanding tubular pile structure, as shown in fig. 4, is similar to the first embodiment and the second embodiment, and mainly differs in that the inner wall surface of the whole body of the steel tube 1 is pressed at predetermined intervals to form multi-stage expanding concave portions 4, so that the whole body of the tubular pile forms convex portions, and is tightly engaged with the surrounding soil to increase the lateral resistance of the pile, and the inner wall surface of the bottom end of the pile hole 8 forms a continuous concave ring 5, in the present embodiment, in the process of expanding the pile end, the expanding device 32 extends out of the horizontal expanding drill bit 33, the spiral drilling machine 3 is started to form the expanding concave ring 5 on the inner wall surface of the bottom end of the pile hole 8, while slowly lifting the expanding device 32, the bottom end of the pile hole 8 is continuously expanded to the lower end of the steel tube 1, then the expanding device 32 retracts into the horizontal expanding drill bit 33, the expanding device 32 is lifted to the lower end of the steel tube 1, the expanding device 32 extends out of the, the inner wall of the steel pipe 1 is extruded at preset intervals through a horizontal drill bit 33, the extrusion direction of an expanding drill bit 33 is continuously adjusted, so that multi-stage staggered and expanded concave parts 4 are formed on the inner wall surface of the whole body of the steel pipe 1, curing materials 7 and concrete 6 are sequentially filled in the steel pipe 1 and the expanded concave parts 4 and concave rings 5 from bottom to top, the curing materials 7 are completely filled in the concave parts 4 and concave rings 5, the concrete 6 is pressed through a pressing plate at the lower end of an inner pipe 22 by a pile press machine 2, the curing materials 7 are pressed, the materials are poured and pressed simultaneously, the curing materials 7 absorb water and expand, high bearing capacity is achieved, and after hardening, the materials act on the bottom end of a pile hole 8 to form a bottom expanding type pile end with the diameter larger than that of the steel pipe 1.

The above-mentioned embodiments are preferred embodiments of the present invention, and are only used for convenience of illustration, but not for limitation of the present invention in any form, and it should be noted that, for those skilled in the art, a plurality of local improvements or decorations can be made without departing from the principle of the present invention, and these improvements and decorations should be viewed as well as the protection scope of the present invention.

Claims

1. A bottom-expanding type pipe pile structure is characterized by comprising a steel pipe, wherein an expanded concave part and a concave ring are formed at the lower end of the steel pipe and the inner wall surface of the bottom end of a pile hole, a curing material and concrete are sequentially filled in the steel pipe and in the expanded concave part and concave ring range from bottom to top, a pressurizing plate capable of moving up and down is arranged on the top surface of the concrete, an inner pipe is connected to the top surface of the pressurizing plate, the inner pipe is installed on a fixed support on a pile pressing machine, the concrete is pressurized by the pile pressing machine through the pressurizing plate at the lower end of the inner pipe, so that the curing material absorbs water and expands, and a bottom-expanding type pile end with a multistage diameter larger than that of the steel pipe is formed at the bottom end.

2. A bellout-type pipe pile structure according to claim 1, wherein the solidified material protruding from the recess at the lower end of the steel pipe and the recess at the lower end of the pile hole bites the bearing layer therein.

3. A bottom-expanding tubular pile structure as claimed in claim 1, wherein said pile press pushes the inner tube to press the concrete with the pressing plate, thereby pressing the solidified material and acting on the bottom end of the pile hole to form a bottom-expanding tubular pile end having a diameter larger than that of the steel tube.