CN114687342A

CN114687342A - Uplift pile with seismic isolation and reduction devices in underground building

Info

Publication number: CN114687342A
Application number: CN202210207602.9A
Authority: CN
Inventors: 王国波; 王鸿杰; 马险峰; 关振长; 彭述权; 禹海涛; 王建宁; 孙富学
Original assignee: Wenzhou University
Current assignee: Wenzhou University
Priority date: 2022-03-03
Filing date: 2022-03-03
Publication date: 2022-07-01

Abstract

The invention discloses an uplift pile with seismic isolation devices in an underground building, which comprises an uplift pile body, wherein a plurality of seismic isolation devices are mixed in the uplift pile body, each seismic isolation device comprises a capsule shell and a plurality of steel balls arranged in the capsule shell, and when an earthquake occurs, the steel balls arranged in the capsule shell collide with each other and collide with the inner wall of the capsule shell, so that seismic energy is consumed. The uplift pile plays a role in consuming earthquake motion energy on the basis of meeting the self bearing capacity.

Description

Uplift pile with seismic isolation and reduction devices in underground building

Technical Field

The invention relates to the technical field of civil engineering, in particular to an uplift pile with an earthquake reduction and isolation device in an underground building.

Background

The 21 st century is recognized as a century of underground space, which has been developed and utilized on a large scale. Underground structures become important components of urban earthquake resistance and disaster prevention. Therefore, the safety of the underground structure itself in the event of an earthquake is of concern. However, the underground structure is buried in the soil (surrounding rock), and the seismic isolation and reduction measures suitable for the surface structure are difficult to popularize in the underground structure, so that the seismic isolation and reduction measures of the underground structure are very deficient, and many measures only stay in the concept stage and cannot be implemented.

Disclosure of Invention

In view of the defects in the prior art, the technical problem to be solved by the invention is to provide an uplift pile with an earthquake reduction and isolation device in an underground building, wherein the uplift pile plays a role in consuming earthquake energy.

The invention is completed by adopting the following technical scheme: the utility model provides an anti-floating pile with subtract shock insulation device among underground building, includes the anti-floating pile body, the inside a plurality of shock insulation devices that subtract that mix of anti-floating pile body, subtract shock insulation device include capsule shell and set up with a plurality of steel balls in the capsule shell, during the earthquake, collide between the steel ball of locating in the capsule shell to and collide between steel ball and the capsule shell inner wall, consume the earthquake kinetic energy.

Furthermore, a plurality of support columns are uniformly distributed in the seismic isolation and reduction device, and the support columns are made of hard elastic materials.

Furthermore, one side end of the capsule shell is provided with a one-way inflation valve.

Further, the uplift pile body comprises steel reinforcement cage and a plurality of piles, the pile is the round platform shape, pile one side diameter is less than the opposite side diameter, the terminal surface of pile minor diameter is placed down, a plurality of piles cup joint in proper order on the steel reinforcement cage and pour fixedly, adjacent pile is pegged graft each other.

Further, the inside cavity design that is of pile body, pile body inner wall have strengthen protruding edge and strengthen protruding edge down, it is located pile body inner wall upper shed department to strengthen protruding edge on, it levels along the up end and pile body upper shed department to strengthen protruding edge on, strengthen protruding edge down and lie in pile body inner wall lower shed department, strengthen protruding edge down the terminal surface and flush with pile body lower shed department, strengthen protruding edge size down and be greater than strengthen protruding edge on, the terminal surface grafting of pile body minor diameter is in big diameter terminal surface, and the terminal surface of pile body minor diameter supports on strengthening protruding edge down to pour into an organic whole through the concrete slurry.

Furthermore, a plurality of through holes are formed in the whole body of the pile body and distributed along the periphery of the side wall of the pile body, the through holes are located in the cavity between the upper reinforcing convex edge and the lower reinforcing convex edge after the adjacent pile bodies are spliced, and when the inner cavity of the pile body is poured, concrete is poured into the cavity from the through holes.

Further, a plurality of seismic isolation and reduction devices are uniformly mixed in the poured concrete.

The invention has the beneficial effects that:

1. a certain amount of concrete of the internal seismic isolation and reduction device is mixed in the poured concrete, and the collision between steel balls in the seismic isolation and reduction device and the collision between the steel balls and the capsule wall can play a role in consuming seismic energy during earthquake.

2. Through doping shock attenuation isolation device in concreting, simple structure, convenient operation, the construction degree of difficulty and engineering cost are lower.

3. The uplift pile is externally sleeved on the reinforcement cage by adopting a prefabricated pile body, and concrete mixed with the seismic isolation and reduction device is poured into the pile body, so that the construction difficulty is reduced, and the operation is convenient.

4. The uplift pile body is provided with a plurality of through holes all around, and the through hole distributes along pile body lateral wall a week, and adjacent pile body grafting back through hole is located strengthens protruding edge and strengthens cavity department between the protruding edge down, when pouring the pile body inner chamber, and the concrete is poured into the cavity by the through hole in, closely pours an organic whole adjacent pile body, has improved the firmness of uplift pile.

5. After the adjacent pile bodies are sleeved, a step surface is formed between the upper reinforcing convex edge of the large-diameter end part and the lower reinforcing convex edge of the small-diameter end part, and the step surface enhances the vertical pulling resistance.

Drawings

The invention has the following drawings:

FIG. 1 is a schematic view of a partial cross-sectional structure of an uplift pile with seismic isolation and reduction devices in an underground building;

FIG. 2 is a schematic cross-sectional view of an anti-seismic device of an uplift pile with an anti-seismic device in an underground building according to a first embodiment;

FIG. 3 is a schematic cross-sectional view of a seismic isolation and reduction apparatus of a uplift pile having the seismic isolation and reduction apparatus in an underground building according to a second embodiment;

FIG. 4 is a schematic top sectional view of an anti-seismic device of an uplift pile with an anti-seismic device in an underground building according to a second embodiment;

fig. 5 is a schematic top sectional view of a seismic isolation and reduction device of a uplift pile with a seismic isolation and reduction device in an underground building according to a third embodiment.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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, not all embodiments. All other embodiments obtained by a person skilled in the art based on the embodiments in the patent of the invention without any inventive work belong to the protection scope of the patent of the invention.

Referring to fig. 1-2, a first embodiment of the present invention provides an uplift pile with seismic isolation devices in an underground building, including an uplift pile body 1, in which a plurality of seismic isolation devices 2 are mixed, and the seismic isolation devices 2 include a capsule shell 3 and a plurality of steel balls 4 arranged in the capsule shell, and when an earthquake occurs, the steel balls arranged in the capsule shell 3 collide with each other, and the steel balls 4 collide with the inner wall of the capsule shell 3, so that seismic energy is consumed.

A certain amount of concrete of the shock absorption and isolation device is doped in the poured concrete, and the shock absorption and isolation device 2 is doped in the poured concrete, so that the structure is simple, the operation is convenient, and the construction difficulty and the construction cost are lower. The collision between the steel balls 4 in the seismic isolation device and the collision between the steel balls 4 and the capsule wall can play a role in consuming seismic energy during earthquake. The uplift pile can achieve the self function and also can achieve the functions of shock absorption and isolation.

Referring to fig. 3 to 4, a second embodiment of the present invention provides a uplift pile with seismic isolation and reduction devices in an underground building, which is substantially the same as the first embodiment except that: a plurality of support columns 5 are uniformly distributed in the seismic isolation and reduction device 2, and the support columns 5 are made of hard elastic materials. Through support column 5 to subtracting the inside supporting role that plays of isolation device 2, prevent to subtract isolation device 2 and be extruded at the in-process that mixes with concrete 6, the extension subtracts isolation device's life.

Further, referring to FIG. 5, a one-way air-filling valve 7 is provided at one side end of the capsule housing. The capsule shell adopts an inflatable design, so that the transportation space is reduced, and the capsule shell is inflated and uniformly mixed with concrete before the uplift pile is poured.

The seismic isolation and reduction device 2 can be used for newly building an uplift pile, can also be used for reforming the existing uplift pile, and can be used for drilling holes in the existing uplift pile and pouring concrete slurry mixed with the seismic isolation and reduction device again. The existing uplift pile is reasonably transformed, the existing facilities are fully utilized, the effect is exerted, and the seismic isolation and reduction functions of the underground structure are achieved on the basis that the construction difficulty and the construction cost are not remarkably increased.

Further, as shown in fig. 1, the uplift pile body 1 is composed of a reinforcement cage 8 and a plurality of piles 9, the piles 9 are in a circular truncated cone shape, the diameter of one side of each pile is smaller than that of the other side of each pile, the end faces 10 of the small diameters of the piles are placed downwards, the piles 9 are sequentially sleeved on the reinforcement cage 8 and are fixed through concrete grout, and the adjacent piles 9 are mutually spliced. The concrete grout comprises concrete 6 and a plurality of seismic isolation and reduction devices 2 which are uniformly mixed in the concrete. The uplift pile adopts the prefabricated pile body to be sleeved on the steel reinforcement cage, and concrete slurry mixed with the seismic isolation and reduction device 2 is poured into the pile body, so that the construction difficulty is reduced, and the operation is convenient.

Further, the interior of the pile body is of a hollow design, and the inner wall of the pile body is provided with an upper reinforcing convex edge 11 and a lower reinforcing convex edge 12. The upper reinforcing convex edge 11 is positioned at the upper opening of the inner wall of the pile body, and the upper end surface of the upper reinforcing convex edge 11 is flush with the upper opening of the pile body. The lower reinforcing convex edge 12 is positioned at the lower opening of the inner wall of the pile body, and the lower end surface of the lower reinforcing convex edge 12 is flush with the lower opening of the pile body. The lower reinforcing flange 12 is larger in size than the upper reinforcing flange 11. The end face 10 with the small diameter of the pile body is inserted into the end face with the large diameter, the end face 10 with the small diameter of the pile body is abutted against the upper end face of the lower reinforcing convex edge 11, and the pile body is poured into a whole through concrete grout. After the adjacent pile bodies 9 are sleeved, a step surface 14 is formed between the upper reinforcing convex edge of the large-diameter end part 13 of each pile body and the lower reinforcing convex edge of the small-diameter end part of each pile body, and the step surface enhances the vertical pulling resistance.

Further, the pile body is provided with a plurality of through-holes 15 all around, and through-hole 15 distributes along pile body lateral wall a week, and adjacent pile body grafting back through-hole is located strengthens protruding edge and strengthens cavity 16 department between the protruding edge down. When the inner cavity of the pile body is poured, concrete slurry is poured into the cavity 16 from the through hole, adjacent pile bodies are tightly poured into a whole, and the firmness of the uplift pile is improved.

Claims

1. The utility model provides an uplift pile that has seismic isolation device in underground building, includes uplift pile body, characterized by: the uplift pile comprises an uplift pile body and is characterized in that a plurality of seismic isolation devices are mixed in the uplift pile body and comprise a capsule shell and a plurality of steel balls arranged in the capsule shell, and when an earthquake occurs, the steel balls arranged in the capsule shell collide with each other and collide with the inner wall of the capsule shell, so that seismic energy is consumed.

2. An uplift pile with seismic isolation and reduction devices in an underground building according to claim 1, which is characterized in that: a plurality of support columns are uniformly distributed in the seismic isolation and reduction device, and the support columns are made of hard elastic materials.

3. An uplift pile with seismic isolation and reduction devices in an underground building according to claim 2, wherein the uplift pile comprises: one side end of the capsule shell is provided with a one-way inflation valve.

4. An uplift pile with seismic isolation and reduction devices in an underground building according to claim 1, 2 or 3, wherein: the uplift pile body is composed of a steel reinforcement cage and a plurality of pile bodies, each pile body is in a circular truncated cone shape, the diameter of one side of each pile body is smaller than that of the other side of each pile body, the end face of the small diameter of each pile body is placed downwards, the pile bodies are sequentially sleeved on the steel reinforcement cage and fixed through concrete grout pouring, and the adjacent pile bodies are mutually spliced.

5. An uplift pile with seismic isolation and reduction devices in an underground building according to claim 4, wherein the uplift pile comprises: the pile body is internally designed in a hollow mode, an upper reinforcing convex edge and a lower reinforcing convex edge are arranged on the inner wall of the pile body, the upper reinforcing convex edge is located at the upper opening of the inner wall of the pile body, the upper reinforcing convex edge is flushed with the upper opening of the pile body along the upper end face, the lower reinforcing convex edge is located at the lower opening of the inner wall of the pile body, the lower reinforcing convex edge is flushed with the lower opening of the pile body along the lower end face, the size of the lower reinforcing convex edge is larger than that of the upper reinforcing convex edge, the end face of the small diameter of the pile body is inserted into the end face of the large diameter, the end face of the small diameter of the pile body is supported on the lower reinforcing convex edge, and the pile body is poured into a whole through concrete slurry.

6. An uplift pile with seismic isolation and reduction devices in an underground building according to claim 5, wherein the uplift pile comprises: the pile body is provided with a plurality of through-holes all around, and the through-hole distributes along pile body lateral wall a week, and adjacent pile body grafting back through-hole is located strengthens protruding edge and strengthens the cavity department between the protruding edge down, and when pouring the pile body inner chamber, the concrete pours into the cavity into by the through-hole in.

7. A uplift pile with seismic isolation devices in an underground building as claimed in claim 5 or 6, wherein the concrete slurry comprises concrete and a plurality of seismic isolation devices uniformly mixed in the concrete.