CN112982466A

CN112982466A - Miniature oblique single pile structure

Info

Publication number: CN112982466A
Application number: CN202110239034.6A
Authority: CN
Inventors: 许将
Original assignee: Wuhan University of Science and Engineering WUSE
Current assignee: Wuhan University of Science and Engineering WUSE; Wuhan University of Science and Technology WHUST
Priority date: 2021-03-04
Filing date: 2021-03-04
Publication date: 2021-06-18

Abstract

The invention discloses a micro inclined single pile structure, which relates to the technical field of engineering pile foundations of wharfs, power transmission iron towers and the like, and comprises a prefabricated inclined pile, a soil retaining plate and inclined struts, wherein the vertical inclination angle of the prefabricated inclined pile is designed to be between 5 and 10 degrees, the soil retaining plate is arranged on the outer side of the prefabricated inclined pile, a plurality of groups of inclined struts are connected and arranged on the inner side of the soil retaining plate, the other ends of the inclined struts are tightly attached to the prefabricated inclined pile, and the bearing and stability effects of the prefabricated inclined pile are improved.

Description

Miniature oblique single pile structure

Technical Field

The invention relates to the technical field of engineering pile foundations such as wharfs and power transmission towers, in particular to a miniature inclined single pile structure.

Background

In recent years, the inclined pile is widely applied to projects such as bridges, wharfs, high-rise mechanisms, large-scale power transmission line towers and the like, the excavated volume of earth can be reduced by the inclined pile foundation, the area of damage of earth vegetation is reduced, and under certain working conditions, the inclined pile foundation is more reasonable in stress, the pile body is stronger in anti-cracking capacity, and the inclined pile foundation has higher uplift bearing capacity and horizontal load resistance.

Although the bearing capacity of the inclined pile is better than that of a straight pile, the working properties of the inclined pile are not known enough so far, and the actual working properties of the inclined pile cannot be reasonably reflected and applied by designing the inclined pile in a straight pile mode in engineering practice, so that certain risks are caused or exist.

Disclosure of Invention

The invention aims to provide a miniature inclined single pile structure, which improves the performance of an inclined single pile, better meets the requirement of bearing capacity and has relatively economic manufacturing cost.

In order to achieve the purpose, the invention provides the following technical scheme: the inclined single pile structure provided by the invention can bear larger axial force compared with a vertical pile, the shear force and bending moment caused by transverse load can be reduced by the inclined single pile, the axial compression capacity of the pile is fully exerted, the horizontal displacement of the inclined single pile can be reduced to a certain extent by the inclined support on the outer side of the inclined single pile, and meanwhile, the deformation of the foundation of the inclined single pile is avoided.

Preferably, the vertical inclination angle of the precast batter pile is designed to be between 5 and 10 degrees.

Preferably, the soil guard plate is composed of a hollow plate, grouting and reinforcing mesh, and the diagonal brace can be fixedly connected to the inner side of the soil guard plate by a fastener or welding.

Preferably, the soil retaining plate and the inclined strut are both pre-buried in the foundation pit, and the backfilled soil is tamped.

Compared with the prior art, the invention has the beneficial effects that: compared with a vertical pile, the inclined single pile structure provided by the invention can bear larger axial force, the inclined single pile can reduce shearing force and bending moment caused by transverse load, the axial compression capacity of the pile is fully exerted, the horizontal displacement of the inclined single pile can be reduced to a certain extent by the inclined strut on the outer side of the inclined single pile, and meanwhile, the deformation of the inclined single pile foundation is avoided.

Drawings

Fig. 1 is a schematic structural view of a micro inclined single pile according to the present invention.

In the figure: 1-precast inclined pile, 2-soil retaining plate and 3-inclined strut.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, the present invention provides a technical solution: including prefabricated batter pile 1, keep off native board 2 and bracing 3, the outside of prefabricated batter pile 1 is provided with keeps off native board 2, it is provided with multiunit bracing 3 to keep off 2 inboard connections of native board, the other end and the 1 inseparable laminating of prefabricated batter pile of bracing 3, the vertical inclination design of prefabricated batter pile 1 is between 5 degrees-10 degrees, it comprises hollow slab, slip casting and reinforcing bar net to keep off

native board

2, 3 accessible fasteners of bracing or welding mode fixed connection in the 2 inboards of fender native board, it is all pre-buried in the foundation ditch to keep off native board 2 and bracing 3, and backfill soil tamp, the bearing and the stability of the improvement prefabricated batter pile 1 that bracing 3 can furthest can reduce its horizontal displacement to a certain extent, avoids oblique single pile basis to warp simultaneously.

The first embodiment is as follows: the single-water horizontal static load condition of the batter pile is shown in table 1

Under the horizontal load effect, precast inclined pile 1 will move to one end, and stake week body soil body will produce the displacement of horizontal direction simultaneously, precast inclined pile 1's horizontal displacement can reduce along with the increase of degree of depth.

The deformation of the soil layer of the whole body of the prefabricated inclined pile 1 is large only at the top position near the pile top, and the displacement is between 20 and 35 mm.

The bracing 3 that precast batter pile 1 was provided with in the displacement direction, the bearing and the stability of improvement precast batter pile 1 that can furthest reduce its horizontal displacement volume simultaneously.

The horizontal bearing capacity of the micro inclined single pile structure provided by the invention is about 2-3 times of that of a vertical single pile, and the micro inclined single pile structure is equivalent to a traditional single inclined pile, has a strong displacement prevention characteristic, and can better meet high-requirement buildings.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a miniature single inclined pile structure, includes precast batter pile (1), keeps off soil board (2) and bracing (3), its characterized in that: the outside of prefabricated batter pile (1) is provided with keeps off native board (2), it is provided with multiunit bracing (3) to keep off native board (2) inboard connection, the other end and the prefabricated batter pile (1) of bracing (3) closely laminate.

2. The micro inclined mono-pile structure according to claim 1, wherein: the vertical inclination angle of the precast inclined pile (1) is designed to be between 5 and 10 degrees.

3. The micro inclined mono-pile structure according to claim 1, wherein: the soil blocking plate (2) is composed of a hollow plate, grouting and reinforcing mesh, and the inclined strut (3) can be fixedly connected to the inner side of the soil blocking plate (2) through a fastener or a welding mode.

4. The micro inclined mono-pile structure according to claim 1, wherein: the soil retaining plate (2) and the inclined strut (3) are both pre-buried in the foundation pit, and backfill soil is tamped.