Prestressed reinforced concrete special-shaped precast pile

A technology of prestressed steel bars and concrete prefabricated piles, which is applied to sheet pile walls, buildings, and foundation structure engineering, and can solve the problems of low lateral bearing capacity of soft soil foundations and restrictions on the use of high-rise building foundations, so as to improve vertical bearing capacity , increase the bending resistance, increase the effect of the outer surface area

Inactive Publication Date: 2012-06-20
天津开发区福林发展有限公司
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  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, in order to improve the bearing capacity of soft soil foundation, reinforced concrete sinking pipe piles, prefabricated reinforced concrete square piles, reinforced concrete bored piles and prestressed concrete piles are mostly used. Reinforced concrete round piles, the soft soil foundation has a small lateral bearing capacity, which limits the use of foundations for high-rise buildings

Method used

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  • Prestressed reinforced concrete special-shaped precast pile
  • Prestressed reinforced concrete special-shaped precast pile
  • Prestressed reinforced concrete special-shaped precast pile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1: Take the hexagonal concrete prefabricated pile 1 of three long sides and three short sides by cutting off three vertices of an equilateral triangle as an example to illustrate,

[0016] like figure 1 As shown: the pile type of the prefabricated concrete pile 1 is a special shape, and the center of the prefabricated concrete pile 1 has a central hole 2. Because the concrete bearing capacity of the central part is small, the diameter of the central hole 2 is about 1 / 3 of the length of the long side. 1 / 5 cylinder; in order to facilitate transportation, each concrete prefabricated pile 1 is about 15 meters long. In practical applications, 15 meters cannot meet the load-bearing requirements, and most of them are more than two sections, so that the bending resistance of the entire pile body is concentrated on the two piles. The connection part, so the two ends of the prefabricated concrete pile 1 are respectively equipped with pile caps 3 made of steel plates. T...

Embodiment 2

[0018] Example 2: Taking the tangent line of a round pile to form three 90° external angle concrete prefabricated piles as an example to illustrate

[0019] like image 3 As shown: the tangent line of the round pile forms three outer corners. The cross section of the prefabricated concrete pile is formed based on the round pile as the intersection point a and b of the center line and the round pile with an angle of 90° on the basis of the round pile, and a circle is made from the intersection point a and b outward Tangent, the intersection of the two tangents forms a 90° external angle A, and the intersection points of the two centerlines and the round pile after turning 30° are c and d, then the line segment ac and bd is arc-shaped, and the intersection point of the two centerlines and the round pile after turning 90° For e and f, draw tangents to the circle from points c, e, b, and f respectively, and the intersection of the two tangents generates another two external angles...

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Abstract

The invention relates to a prestressed reinforced concrete special-shaped precast pile, wherein the concrete precast pile is special in shape, the center of the concrete precast pile is provided with a center hole, two ends of the concrete precast pile are respectively provided with a pile cap made from a steel plate, the shape of each pile cap is the same as the cross section shape of the concrete precast pile, one end of each pile cap is provided with a 45-degree groove, the pile caps and the precast pile are fixed by bolts, and every two concrete precast piles are connected with one another into a whole in a welding way by virtue of the pile caps; and the cross section of the special-shaped precast pile is a hexagon with three long edges and three short edges formed by cutting off three top angles of equilateral triangle or three external angles formed by outwards extending three tangent lines with arc or circular pile-shaped short edges, and the external angles are acute angles, 90-degree angles or obtuse angles. The prestressed reinforced concrete special-shaped precast pile has the advantages that the external surface area of the special-shaped precast pile is increased, so that the vertical frictional force and the vertical bearing capacity can be greatly improved; and simultaneously, the cross section is increased, so that the bending resistance of a pile body can be correspondingly increased as well, i.e., the bearing capacity of the whole pile body can be effectively improved.

Description

technical field [0001] The invention relates to a prestressed reinforced concrete prefabricated pile, in particular to a prestressed reinforced concrete special-shaped prefabricated pile. Background technique [0002] At present, in order to improve the bearing capacity of the soft soil foundation, reinforced concrete sinking pipe pouring piles, prefabricated reinforced concrete square piles, reinforced concrete bored piles and prestressed reinforced concrete round piles are mostly used, and the lateral bearing capacity of the soft soil foundation is relatively low. Small, so that the use of the foundation of high-rise buildings is limited. Contents of the invention [0003] The invention provides a prestressed reinforced concrete special-shaped prefabricated pile in order to solve the control problem existing in the known technology. [0004] The technical scheme adopted by the present invention to solve the control problems existing in the known technology is: it inclu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/30E02D5/58
Inventor 程松林姜寅卿张金勇刘超
Owner 天津开发区福林发展有限公司
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