CN2352578Y

CN2352578Y - Compaction and special shaped pile made of cement, coal ash and lost stone

Info

Publication number: CN2352578Y
Application number: CN 97231208
Authority: CN
Inventors: 杨军; 唐建中; 陈耀先; 彭芝平; 冯禄; 秦晖
Original assignee: Inst Of Foundation Chinese Inst Of Architectural Sciences
Current assignee: Inst Of Foundation Chinese Inst Of Architectural Sciences
Priority date: 1997-12-18
Filing date: 1997-12-18
Publication date: 1999-12-08
Anticipated expiration: 2007-12-18

Abstract

The utility model relates to a compaction and special-shaped pile made of cement, coal ash and lost stones. The utility model comprises a pile body which presents a column shape, the perimeter of the cross section of the pile body is provided with 3 to 6 segments of arc lines with outward curvature and 3 to 6 segments of arc lines with inward curvature which are connected at intervals, and cross sections in triangular, four prismatic shape, penta prismatic shape and hexagonal shape. The utility model can increase the side surface area of the pile body of a CFG pile without material usage increasing, even diminishing, and the bearing capacity of the pile can be enhanced by 20%-50%. The utility model is applicable to the foundation treatment of building engineering.

Description

Abnormity cement, flyash, broken stone pile

The utility model relates to a kind of building unit.

Existing cement, flyash, broken stone pile are that the novel ground of formally being classified as national worker's method in 1996 is handled the stake type, adopt cement, flyash and rubble material, generally do not prepare reinforcing bar, are called the CFG stake.No matter the CFG stake is that vibration sinking tube or long auger are pressed filling, is circular cross-section behind the pile.If want to improve the bearing capacity of stake, traditional way one is that the increase stake is long, the 2nd, and the stake of increase stake is directly.But increase a stake footpath or a long meeting simply and increase material usage widely, consider it is worthless from economic angle.

The purpose of this utility model provides a kind of special-shaped cement, flyash, broken stone pile, under the condition that does not increase even reduce material usage, increases the supporting capacity of CFG stake.

The technical solution of the utility model is:

This special-shaped cement, flyash, broken stone pile, pile body is column, it is characterized in that: the periphery of pile body cross section is to be formed by connecting at interval by 3～6 sections outside camber line and 3～6 sections inside camber lines of curvature of curvature, forms the pile body cross section of prismatic, four prismatics, five prismatics, six prismatics.

Between the inside camber line of camber line that described curvature is outside and curvature the smooth connection line can be arranged.

Operating principle of the present utility model: the bearing capacity of stake is made up of bearing capacity of pile tip and stake side-friction force, and the side-friction force of its king-pile is a major part, generally accounts for more than 2/3rds of CFG pile capacity, is to increase the stake side surface area so improve the key of pile capacity.The experiment proved that as shown in Figure 1, broken circle is traditional CFG stake circular cross-section, if adopt the special-shaped pile body of shadow shapes, then can be equivalent to provide identical bearing capacity under the situation of circular pile body 27.3%, both save 72.7% material usage at volume.Because the contrast of Fig. 1 middle section is only set up in theory, the tip of dash area can't be realized in actual engineering among the figure, so the pile body cross section that the utility model is designed is prismatic, four prismatics, five prismatics, six prismatics.Fig. 2, Fig. 3, Fig. 4, abnormity stake shown in Figure 5 are compared pile side friction with the circular cross-section stake that same cross-sectional is amassed and are improved 28%, 23%, 20%, 18% respectively; Identical at side friction, promptly under the situation that Zhuan girth is constant, save 38.96%, 33.90%, 30.56%, 28.08% material usage respectively than circular cross-section stake.Fig. 6 abnormity stake shown in Figure 7 is compared pile side friction with the circular cross-section stake that same cross-sectional is amassed and is improved 36%, 46% respectively; Identical at side friction, promptly under the situation that Zhuan girth is constant, save 45.93%, 53.08% material usage respectively than circular cross-section stake.The circular cross-section stake that abnormity stake and the same cross-sectional that Fig. 8, Fig. 9 show amassed is compared pile side friction and is improved 27%, 30% respectively; Identical at side friction, promptly under the situation that Zhuan girth is constant, save 38.00%, 40.83% material usage respectively than circular cross-section stake.

The utility model has the advantages that: can increase the pile body side surface area of CFG stake under the prerequisite that does not increase even reduce material usage, the bearing capacity of stake can improve 20%-50%.Be applicable to the processing of construction work ground.

Below in conjunction with accompanying drawing and eight kinds of embodiment the utility model is described in detail:

Fig. 1 is the theoretical stake of a utility model shape schematic diagram.

Fig. 2 is the cross sectional representation of prismatic pile body, and the periphery of pile body cross section is to be formed by connecting at interval by 3 sections outside circular arc line and 3 sections inside circular arc lines of curvature of curvature.

Fig. 3 is the cross sectional representation of four prismatic pile bodies, and the periphery of pile body cross section is to be formed by connecting at interval by 4 sections outside circular arc line and 4 sections inside circular arc lines of curvature of curvature.

Fig. 4 is the cross sectional representation of five prismatic pile bodies, and the periphery of pile body cross section is to be formed by connecting at interval by 5 sections outside circular arc line and 5 sections inside circular arc lines of curvature of curvature.

Fig. 5 is the cross sectional representation of six prismatic pile bodies, and the periphery of pile body cross section is to be formed by connecting at interval by 6 sections outside circular arc line and 6 sections inside circular arc lines of curvature of curvature.

Fig. 6 is the cross sectional representation of the utility model prismatic pile body, and the periphery of pile body cross section is to be formed by connecting at interval by 3 sections outside camber line and 3 sections inside camber lines of curvature of curvature.Between the inside camber line of camber line that curvature is outside and curvature the smooth connection line is arranged.

Fig. 7 is the cross sectional representation of the utility model four prismatic pile bodies, and the periphery of pile body cross section is to be formed by connecting at interval by 4 sections outside camber line and 4 sections inside camber lines of curvature of curvature.Between the inside camber line of camber line that curvature is outside and curvature the smooth connection line is arranged.

Fig. 8 is the cross-sectional view of another kind of prismatic pile body, and the periphery of pile body cross section is to be formed by connecting at interval by 3 sections outside oval camber line and 3 sections inside oval camber lines of curvature of curvature.

Fig. 9 is the cross-sectional view of another kind of four prismatic pile bodies, and the periphery of pile body cross section is to be formed by connecting at interval by 4 sections outside oval camber line and 4 sections inside oval camber lines of curvature of curvature.

Claims

1, a kind of special-shaped cement, flyash, broken stone pile, pile body is column, it is characterized in that: the periphery of pile body cross section is to be formed by connecting at interval by 3～6 sections outside camber line and 3～6 sections inside camber lines of curvature of curvature, forms the pile body cross section of prismatic, four prismatics, five prismatics, six prismatics.

2, special-shaped cement according to claim 1, flyash, broken stone pile is characterized in that: between the inside camber line of camber line that described curvature is outside and curvature the smooth connection line is arranged.