CN2048874U - Cross tip reinforce concrete flat base pile shoe - Google Patents

Abstract

The utility model relates to a cross tip reinforced concrete flat base pile shoe which is a pile shoe used in the foundation of a foundation pile in civil construction. The cross tip reinforced concrete flat base pile shoe is provided with a flat cross tip or a sharp cross tip; a pile body can be a prefabricated pile or a filling pile with different cross sections. The pile body reserves the penetrating function in pile sinking process; the root part of a cross tip is a flat base which can densify the soil layer on the bottom surface of the cross tip reinforced concrete flat base pile shoe and can improve the supporting function at the position of a pile tip. The cross tip reinforced concrete flat base pile shoe can enhance the bearing capacity of a pile by 10%-30% under the condition of not increasing any fees. Appropriate pile shoe and pile body can be selected according to the geological conditions, the base strength and the bearing layer of different thickness. The utility model can be widely used in pile foundation engineering.

Description

Cross tip reinforce concrete flat base pile shoe

The utility model relates to the shoe of using stake in the civil construction project foundation pile basis.

In civil construction project, ground is beaten tube-sinking cast-in-situ pile and is all adopted conical shoe, all adopt positive four limit tapered pile points and give the system stake, its objective is for making pile body successfully enter the required soil layer of ground, because the effect of thrusting of awl point reduces the supporting role at stake point place greatly.

The purpose of this utility model is to provide a kind of cross point steel bar concrete flat shoe, the shoe point is a cross, both kept the thrust effect of shoe in pile driving process, and cross point root is flat, soil layer that again can densification shoe bottom surface, improve the supporting role at stake point place, can under the situation that does not increase any expense, make the bearing capacity of stake improve 10～30%.Thereby reduce the cost of pile foundation engineering.

The utility model is achieved in that by steel bar concrete and gives system factory, produces the flat cross point flat shoe of steel bar concrete or the flat shoe of awl cross point steel bar concrete in all size and cross section.Thick according to engineering properties, geological conditions, bearing stratum then, approach and select the pile body and the shoe that are complementary, make it connect into a whole stake with diverse ways.Promptly constitute flat, the flat shoe of awl cross point steel bar concrete and give the system stake, the flat shoe castinplace pile four big series of flat, awl cross point steel bar concrete.

Fig. 1, the flat cross point flat shoe of steel bar concrete (1) (be called for short flat cross shoe, below roughly the same).

Fig. 2, flat cross shoe (2).

Fig. 3, awl cross shoe (3).

Fig. 4, awl cross shoe (4).

Fig. 5, Fig. 1,3 A are to view.

Fig. 6, Fig. 2,4 B are to view.

Fig. 7, give system stake by what flat cross shoe (1) was formed.

Reinforcing bar (5), cement (6), pile body (7) are stayed in giving of pile body.

Fig. 8, by the awl cross shoe (3) forms give the system.

Fig. 9, the castinplace pile of forming by flat cross shoe (2).

Pile body (8), punching block pipe (9).

Figure 10, by the castinplace pile formed of awl cross shoe (4).

Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail:

With reference to Fig. 1,3,5, these two kinds of shoes are used to give the system stake, and the pile body cross section is a square, has giving of slotting reinforcing bar to box out 4 above.

With reference to Fig. 2,4,6, these two kinds of shoes are used for castinplace pile, and the pile body cross section is circular.

With reference to Fig. 1,2, be flat cross shoe, be used for thin layer bearing stratum or layer of sand bearing stratum, it is dark excessively not allow a spine to go into bearing stratum, and the surface of only thrusting bearing stratum can fully make soil layer densification under the flat shoe of cross point root, reach the effect of compacting bearing stratum, improve the bearing capacity of stake.

With reference to Fig. 3,4, be the shoe of awl cross, be used for thicker bearing stratum, in order to improve a bottom supporting power, adopt the pointed certain depth that easily thrusts bearing stratum of awl cross, and more can bring into play the densification effect of soil layer under the flat shoe of awl cross point root.If bearing stratum thickness allows, it is that 3～4 times of pile body diameter are for best that bearing stratum depth is thrust in shoe.

With reference to Fig. 7,8, pile body is steel bar concrete and gives system stake, according to design stake position, gives and buries flat cross shoe (1) or awl cross shoe (3), and give in shoe and to fill the cement (6) (sulphide mastic) that has melted in boxing out.And stay reinforcing bar (5) to insert respectively in giving of flat cross shoe (1) or awl cross shoe (3) box out the giving of pile body, treat that sulphide mastic cooling, scleroma for the whole system of giving stake, can adopt hammering, vibration or static pressure to carry out piling construction.

With reference to Fig. 9,10, pile body is tube-sinking cast-in-situ pile, and is the same with general immersed tube bored pile construction method.Punching block pipe (9) is inserted in flat cross shoe (2) or the awl cross shoe (4), adopt hammering, vibration or static pressure, immersed tube construction, sink to design elevation, pouring concrete and insert pile body (8) (cage of reinforcement) in punching block pipe (9), extract again the punching block pipe (9) tube-sinking cast-in-situ pile.

The pile body of above stake and the sectional area of shoe are complementary substantially.Under certain geological conditions, also can make the expansion type to shoe, the cross section that is about to shoe is done greatlyyer 1.5～2 times than pile body cross section.The raising of its bearing capacity, the reduction of construction costs are more remarkable, are particularly useful for the easily compacted stratum of miscellaneous fill ground or soil layer, and construction sequence and process are same as described above not to be repeated.

This cross tip reinforce concrete flat base pile shoe can give goods factory by concrete and carry out producing in serial form, makes the shoe of seriation, selects the pile body and the shoe that are complementary according to engineering properties, geological conditions, supporting course are thick, thin. This cross tip reinforce concrete flat base pile shoe, both kept the thrust effect of shoe in pile driving process, the cross tip root is flat, soil layer that again can densification shoe bottom surface, improve the supporting role at stake point place, can in the situation that does not increase any expense, make the bearing capacity of stake improve 10～30%. Thereby reduce the cost of pile foundation engineering, can be widely used in the civil construction project foundation pile foundation engineering.

Claims (3)

1, the shoe of the stake of using in a kind of civil construction project foundation pile basis, the flat shoe of cross point steel bar concrete, shoe is fixed on the pile body, it is characterized in that the shoe top is the cross point, and cross point root is flat.

2, shoe according to claim 1 is characterized in that cross pointed stake boots are divided into flat cross shoe (1), flat cross shoe (2), awl cross shoe (3), awl cross shoe (4).

3, shoe according to claim 1 and 2 is characterized in that putting down, bores cross shoe (1), (2), (3), (4) and gives the system stake, and the castinplace pile pile body constitutes whole stake, for flat, awl cross give the system stake, and flat, awl cross castinplace pile four big series.

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