CN201686984U

CN201686984U - Tubular pile

Info

Publication number: CN201686984U
Application number: CN2010201331757U
Authority: CN
Inventors: 赖惠清; 邓迎芳; 李慧莹; 徐晓博; 赵自亮; 苏剑良; 陈卫文; 曾佳; 李明
Original assignee: Guangzhou Hengsheng Construction Engineering Co Ltd
Current assignee: Guangzhou Hengsheng Construction Engineering Co., Ltd.
Priority date: 2010-03-12
Filing date: 2010-03-12
Publication date: 2010-12-29
Anticipated expiration: 2020-03-12

Abstract

The utility model discloses a tubular pile which is used for constructing the tubular pile of soft soil foundation. The tubular pile comprises a cylinder-shaped pile body with an empty chamber, and a pile sharp which is welded with the pile body into a whole body, wherein one end of the pile sharp is provided with a saw tooth-shaped opening, the other end of the pile sharp is a flat end which is welded with the pile body, and the opening is communicated with the empty chamber in the pile body. By adopting the technical scheme, the saw tooth-shaped pile sharp is better for breaking the rock and entering into the soil, so that the tubular pile can directly cut the soil body rather than discharging the soil, improve the soil-returning quantity of a pile core, and effectively reduces the weak soil-extruding effect.

Description

A kind of pile tube

Technical field

The present invention relates to the realm of building construction, be specifically related to a kind of pile tube that is applicable to soft soil foundation construction,, improve the bearing capacity of ground by to the intensive pile tube that is covered with of soft foundation large tracts of land.

Background technology

Pearl River Delta area is the same with China other coastal areas, the forward position that belongs to reform and development, urgent development is very fast, in recent years, mega projects such as various places factory building are constantly built, this intermediate item terrace requirement for bearing capacity height, but because the coastal area mud is generally thicker, so the bearing capacity deficiency of ground is except that the main body frame basis, terrace adopts the intensive pipe pile foundation of large tracts of land in design, guarantee it at load supporting ability of ground, but adopt the intensive tube pile construction of large tracts of land, soil compaction effect very easily occurs, i.e. back piling causes the skew of first piling to the extruding of first piling, tilt and protuberance.In construction, the construction access road by the design pile tube and the influence that soil compaction effect could be avoided or reduce to the pressure release ditch is set, the stake point of different pile tubes is also owing to have the different soil amounts of returning in addition, and causes different soil compaction effects.

For reducing soil compaction effect, in the construction of existing prefabricated reinforced concrete pipe pile,, adopt as shown in Figure 1 cross piling bar point (a) or standard openings shaped steel stake point (b) generally by standard collective drawings " prestressed concrete pipe pile " requirement (03SG409).Cross piling bar point adopts two block plates that weldering " ten " word intersects on the block plate, use the sharp pile tube of cross stake in the process of burying, not have the soil of returning and enter pile tube stake in-core, the circular bottom plate of cross stake point has stopped entering of soil, and is obvious to peripheral soil compaction effect when making a large amount of tube pile construction; Standard openings type stake point adopts with 6 trapezoidal floors of one section steel cylinder outside weld, and the tube limit floor of standard openings type stake point is outwards to break ground, and makes that entering a core soil reduces; And steel cylinder bottom be a planar rings, and the resistance that broken rock buries is all bigger, and the soil amount that enters pile tube stake core when using the pile tube of standard openings type stake point to bury is less, and comparatively difficult in argillic horizon, rock stratum, makes that tube pile construction speed is lower.In addition, above-mentioned two class stake points combine by the polylith steel plate, need welding fabrication, and weld seam etc. are more, so make comparatively complicated.

Summary of the invention

In order to solve the problems of the technologies described above, the invention provides a kind of pile tube, be applied to the tube pile construction of soft foundation, the broken rock of tube pile construction buries more effective, has bigger stake core and return the soil amount in pile tube buries process.

To achieve these goals, the present invention adopts following technical scheme: a kind of pile tube, be applied to the tube pile construction of soft foundation, the stake point that described pile tube comprises the tubular pile body that has hollow cavity, is welded as a whole with described pile body, one end of described stake point is provided with the sawtooth pattern opening, the other end is the flush end with pile body welding, and the interior cavity of described opening and pile body communicates.

Adopt the beneficial effect of technique scheme to be: at the bottom of the flat ring with respect to the plectane back cover of cross stake point and open-type stake point, sawtooth pattern stake point can be more favourable broken rock bury, and efflux for the vertical cut soil body rather than with the soil body, can increase the soil amount of returning of a core, effectively weaken soil compaction effect.

As improvement of the technical scheme, the oblique angle of described sawtooth both sides is 40 °～50 °.

As further improvement in the technical proposal, described stake point is made through cutting and welding procedure by steel plate materials.Stake point is made and is only used a block length shape steel plate, and therefrom sawtooth pattern is cut, and then two block plates is rolled into cylinder separately, get final product two stake points, then with stake point and pile body by being welded as a whole, promptly obtain used pile tube in the construction.Simple, weld seam minimizing that the sharp manufacture craft of stake is made: the sharp stack shell of whole stake is a block plate, has only a weld seam (reel weld seam) and an otch (the profile of tooth cutting during steel plate).

Description of drawings

Fig. 1 is the structural representation of existing cross piling bar point (a) or standard openings shaped steel stake point (b);

Fig. 2 is the structural representation of a kind of embodiment of a kind of pile tube of the utility model;

Fig. 3 is the structural representation of the stake point among Fig. 2 embodiment.

The specific embodiment

For making the present invention easier to understand,, further set forth the present invention below in conjunction with specific embodiment.

Please refer to signal a kind of embodiment shown in Figure 2, a kind of pile tube, be applied to the tube pile construction of soft foundation, the stake point 2 that described pile tube comprises the tubular pile body 1 that has hollow cavity, is welded as a whole with described pile body, as shown in Figure 3, an end of described stake point 2 is provided with the sawtooth pattern opening, and the oblique angle of sawtooth 20 both sides is 45 °, the length of stake point 2 is 150mm, and the facewidth of sawtooth 20 is 40mm.The other end of stake point 2 be the flush end with pile body 1 welding, and described opening 22 and pile body 1 interior cavity 10 communicates.

Adopt the beneficial effect of technique scheme to be: at the bottom of the flat ring with respect to the plectane back cover of cross stake point and open-type stake point, the oblique angle of sawtooth both sides is 45 °, this sawtooth pattern stake point can be more favourable broken rock bury, the vertical cut soil body, and the cavity in opening and the pile body communicates, pile tube is not that the soil body is effluxed, thereby can increase the soil amount of returning of a core, effectively weakens soil compaction effect.

In the present embodiment, described stake point is made through cutting and welding procedure by steel plate materials.Stake point is made and is only used a block length shape steel plate, and therefrom sawtooth pattern is cut, and then two block plates is rolled into cylinder separately, get final product two stake points, then with stake point and pile body by being welded as a whole, promptly obtain used pile tube in the construction.Simple, weld seam minimizing that the sharp manufacture craft of stake is made: the sharp stack shell of whole stake is a block plate, the otch that the profile of tooth cutting when having only a reel weld seam and steel plate produces.

Be that the pile tube of 30m is an example with pile tube length below, with cross piling bar point, the stake of standard openings type point and embodiment illustrated in fig. 2 in sawtooth pattern stake point return the test of soil amount respectively, control piling speed is the same, native value is returned in measurement, obtain the soil amount of the returning average of above three types of stake points, and calculate and return native length ratio, wherein, return native length and compare=on average return soil amount ÷ pile tube length, result of the test is as shown in table 1 below:

Soil amount average is returned in the test of table 1 all kinds stake point

The sharp type of stake	On average return soil amount (m)	Return native length ratio
			Standard openings type stake point	3.9?	0.13?
Cross piling bar point	0?	0?
			Sawtooth pattern stake point	8.3?	0.27?

Result of the test shows: under the identical condition of piling speed, it is maximum that sawtooth pattern opening stake point returns the soil amount, returns native length than high, and in application in practice, the soil compaction effect of generation is also the most weak, is suitable for the tube pile construction of soft foundation.

Last institute should be noted that; above embodiment is only in order to illustrate the technical solution of the utility model but not limiting the scope of the invention; although the present invention has been done detailed description with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can make amendment or be equal to replacement technical scheme of the present invention, and not break away from the essence and the scope of technical solution of the present invention.

Claims

1. pile tube, be applied to the tube pile construction of soft foundation, the stake point that described pile tube comprises the tubular pile body that has hollow cavity, is welded as a whole with described pile body, it is characterized in that: an end of described stake point is provided with the sawtooth pattern opening, the other end is the flush end with pile body welding, and the interior cavity of described opening and pile body communicates.

2. pile tube according to claim 1 is characterized in that: the oblique angle of described sawtooth both sides is 40 °～50 °.

3. according to claim 1 or 2 arbitrary described pile tubes, it is characterized in that: described stake point is made through cutting and welding procedure by steel plate materials.