CN111764376A - An earthquake-resistant building foundation pile - Google Patents

Abstract

The invention discloses an earthquake-resistant building foundation pile, which belongs to the technical field of buildings and comprises a prefabricated foundation pile body and a bearing platform fixedly arranged at the upper end of the prefabricated foundation pile body, wherein the bearing platform is positioned above the ground, the prefabricated foundation pile body is positioned below the ground, a bottom plate is arranged at the lower end of the prefabricated foundation pile body, a plurality of damping plates are annularly arranged on the outer side of the prefabricated foundation pile body and are circumferentially arranged at intervals to form an annular shape, the damping plates extend downwards along the axial direction of the prefabricated foundation pile body, a damping structure is connected between each damping plate and the base plate body, and loam is filled in a space between each damping plate and the prefabricated foundation pile body. The invention can carry out earthquake-resistant design on the building pile foundation, has good bearing capacity and economic structure, can radically reduce the influence of earthquake on the building and improve the earthquake resistance of the building.

Description

An earthquake-resistant building foundation pile

technical field

The invention belongs to the technical field of building structures, in particular to an earthquake-resistant building foundation pile.

Background technique

In recent years, my country has experienced a high incidence of earthquakes, and the country has raised the seismic requirements for buildings. The new buildings constructed today basically have good seismic effects and improve people's living safety. However, for the buildings constructed before this, the earthquake resistance effect is poor, and the occupancy safety is extremely low. In order to make buildings meet the national seismic requirements, most of them only carry out seismic design on the part above the building ground, and there is little research on the seismic design below the building ground. The pile foundation can achieve a certain anti-seismic effect, but this design leads to complex installation and poor bearing capacity, which cannot meet the bearing requirements of super-large buildings.

SUMMARY OF THE INVENTION

In view of this, the purpose of the present invention is to provide an earthquake-resistant building foundation pile, which can carry out an earthquake-resistant design for the building pile foundation, has good bearing capacity, has an economical structure, can reduce the impact of earthquakes on the building from the root, and improves the earthquake-resistant capacity of the building. .

To achieve the above object, the present invention provides the following technical solutions:

An earthquake-resistant building foundation pile of the present invention comprises a prefabricated foundation pile body and a cap fixed on the upper end of the prefabricated foundation pile body. The cap is located above the ground, and the prefabricated foundation pile body is located below the ground. The lower end of the foundation pile body is provided with a bottom plate, the outer ring of the prefabricated foundation pile body is provided with a plurality of damping plates, the plurality of damping plates are arranged in a ring shape along the circumferential direction, and the damping plates are arranged along the axial direction of the prefabricated foundation pile body. Extending downward, a damping structure is connected between each of the damping plates and the base plate body, the space between the damping plate and the prefabricated foundation pile body is filled with loam, and a number of upper chutes are opened at the bottom of the bearing platform , the upper chute is evenly distributed along the circumferential direction of the bearing platform, the upper end of each damping plate is fixed with a first sliding block, the first sliding block and the upper chute are slidably matched, and the upper surface of the bottom plate is provided with several sliding blocks The lower grooves are evenly distributed along the circumferential direction of the bottom plate, a second sliding block is fixed at the lower end of each damping plate, and the second sliding block is slidably matched with the lower grooves.

Further, the damping plate is formed by a plurality of vertical annular plates in series in sequence along the vertical direction, and the two adjacent vertical annular plates are connected by energy-consuming steel bars.

Further, in the damping plate, vertical through holes are formed on the vertical annular plate, and each energy-consuming steel bar penetrates through all the vertical annular plates and is fixedly connected to the vertical annular plate.

Further, the damping structure is a tuned mass damper, the tuned mass damper is horizontally arranged between the prefabricated pile body and the damping plate, one end of the tuned mass damper is fixedly connected to the inner wall of the damping plate, and the tuned mass damper is The other end of the mass damper is fixedly connected with the prefabricated foundation pile body.

Further, the tuned mass damper is arranged between each of the vertical annular plate and the prefabricated pile body.

Further, a round table plate is provided on the outer side of the lower part of the damping plate, the round table plate extends outward in the radial direction of the prefabricated foundation pile body, and a central hole for the damping plate to give way is opened in the middle of the round table plate, so The circular plate and the damping plate are slidably matched.

Further, a third sliding block is fixed on the outer side of the lower part of the damping plate, a vertical sliding groove is formed on the inner wall of the circular plate, and the third sliding block and the vertical sliding groove are slidably matched.

Further, the upper end of the circular truncated plate is integrally provided with a truncated cone, and the inclined surface of the truncated cone is inclined toward one side of the damping plate.

The beneficial effects of the present invention are:

In the present invention, the upper end of the prefabricated foundation pile body is provided with a support platform for receiving the upper building, a plurality of damping plates are arranged in a ring shape along the circumferential direction, and a damping structure is connected between each of the damping plates and the base plate body, When the soil outside the prefabricated pile body forms a radial excitation force, the seismic excitation first acts on the damping plate outside the prefabricated foundation pile body, and drives the damping plate to break through the constraints of the loam to move. There is a damping structure connected, so when the damping plate transmits the damping force to the base plate body, the damping structure can dissipate energy and shock, thereby reducing the influence of radial seismic excitation on the prefabricated pile body and increasing the seismic resistance of the foundation pile structure. ability.

The upper end of the prefabricated foundation pile body of the present invention is provided with a cap, and the lower end is provided with a bottom plate. The cap, the prefabricated foundation pile body and the bottom plate are closely connected and connected, so as to ensure the bearing capacity of the foundation pile and prevent the building from falling down during normal use. The possibility of collapse increases the stability of the building. The bottom of the bearing platform and the upper side of the bottom plate are provided with sliding grooves, and the two ends of the damping plate are slidably connected with the bearing platform and the bottom plate respectively. Dislocation occurs between them, making the whole device more stable.

Other advantages, objects, and features of the present invention will be set forth in the description that follows, and to the extent that one skilled in the art may or may learn it from the practice of the present invention. The objectives and other advantages of the present invention may be realized and attained by the following description.

Description of drawings

In order to make the purpose, technical solutions and beneficial effects of the present invention clearer, the present invention provides the following drawings for description:

Fig. 1 is the structural representation of the device of the present invention;

Fig. 2 is the arrangement schematic diagram of damping plate of the present invention;

Fig. 3 is the structural representation of round platen;

FIG. 4 is a schematic diagram of the structure of the bottom plate.

The drawings are marked as follows: prefabricated pile body 1, cap 2, bottom plate 3, damping plate 4, vertical annular plate 41, energy-consuming steel bars 42, vertical through holes 43, damping structure 5, upper chute 6, The first sliding block 7 , the lower sliding groove 8 , the second sliding block 9 , the circular plate 10 , the central hole 11 , the third sliding block 12 , the vertical sliding groove 13 , and the conical frustum 14 .

Detailed ways

The embodiments of the present invention are described below through specific specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content described in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the drawings provided in the following embodiments are only used to illustrate the basic idea of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

Among them, the accompanying drawings are only used for exemplary description, and represent only schematic diagrams, not physical drawings, and should not be construed as limitations of the present invention; in order to better illustrate the embodiments of the present invention, some parts of the accompanying drawings will be omitted, The enlargement or reduction does not represent the size of the actual product; it is understandable to those skilled in the art that some well-known structures and their descriptions in the accompanying drawings may be omitted.

The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms “upper”, “lower”, “left” and “right” , "front", "rear" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must be It has a specific orientation, is constructed and operated in a specific orientation, so the terms describing the positional relationship in the accompanying drawings are only used for exemplary illustration, and should not be construed as a limitation of the present invention. situation to understand the specific meaning of the above terms.

As shown in Figures 1 to 4, an earthquake-resistant building foundation pile of the present invention comprises a prefabricated foundation pile body 1 and a cap 2 fixed on the upper end of the prefabricated foundation pile body 1. The cap 2 is located above the ground, so The prefabricated foundation pile body 1 is located below the ground, the lower end of the prefabricated foundation pile body 1 is provided with a bottom plate 3, and the outer ring of the prefabricated foundation pile body 1 is provided with a plurality of damping plates 4, and the plurality of damping plates 4 are arranged in the circumferential direction. The spaced arrangement is in an annular shape, the damping plates 4 extend downward along the axial direction of the prefabricated pile body 1 , and a damping structure 5 is connected between each of the damping plates 4 and the base plate body, and the damping plates 4 are connected to the prefabricated foundation The space between the pile bodies 1 is filled with loam, the bottom of the bearing platform 2 is provided with a plurality of upper chutes 6, the upper chutes 6 are evenly distributed along the circumferential direction of the bearing platform 2, and the upper end of each damping plate 4 is fixed There is a first sliding block 7, and the first sliding block 7 and the upper sliding groove 6 are slidably matched. The upper surface of the bottom plate 3 is provided with a number of lower sliding grooves 8, and the lower sliding grooves 8 are evenly distributed along the circumferential direction of the bottom plate 3. A second sliding block 9 is fixed on the lower end of the damping plate 4 , and the second sliding block 9 is slidably matched with the lower groove 8 .

In the present invention, the upper end of the prefabricated foundation pile body 1 is provided with a support platform 2 for receiving the upper building, and a plurality of damping plates 4 are arranged in a ring shape at intervals along the circumferential direction, and are connected between each of the damping plates 4 and the base plate body There is a damping structure 5. When the soil outside the prefabricated foundation pile body 1 forms a radial excitation force, the seismic excitation first acts on the damping plate 4 outside the prefabricated foundation pile body 1, and drives the damping plate 4 to break through the shackles of the loam for displacement. , since the damping structure 5 is connected between the damping plate 4 and the base plate body, when the damping plate 4 transmits the damping force to the base plate body, the damping structure 5 can dissipate energy and shock, thereby reducing the radial seismic excitation to the prefabricated The influence of the foundation pile body 1 increases the seismic capacity of the foundation pile structure.

In the present invention, the upper end of the prefabricated foundation pile body 1 of the present invention is provided with a cap 2, and the lower end is provided with a base plate 3, and the cap 2, the prefabricated foundation pile body 1 and the base plate 3 are closely connected and connected to ensure the bearing capacity of the foundation pile. ability to prevent the building from collapsing downward during normal use, increasing the stability of the building. The bottom of the bearing platform 2 and the upper side of the bottom plate 3 are provided with sliding grooves, and the two ends of the damping plate 4 are slidably connected with the bearing platform 2 and the bottom plate 3 respectively, which can play a guiding role and make the damping plate 4 follow the specified track. Move, prevent the dislocation between the damping plates 4, and make the whole device more stable.

In this embodiment, the damping plate 4 is formed by a plurality of vertical annular plates 41 connected in series along the vertical direction, and two adjacent vertical annular plates 41 are connected by energy-consuming steel bars 42 . Dividing each damping plate 4 into several vertical annular plates 41 is convenient for prefabrication and assembly, simple and inexpensive in construction, capable of mass production and cost reduction. By arranging the energy-consuming steel bar 42, it can be used to connect two adjacent vertical circular ring plates 41, and can also perform a horizontal energy consumption when a dislocation occurs between the two.

In this embodiment, in the damping plate 4, vertical through holes 43 are formed on the vertical annular plate 41, and each energy-consuming steel bar 42 penetrates through all the vertical annular plates 41 and is connected with the vertical annular plate 41. The vertical annular plate 41 is fixedly connected. In this embodiment, the vertical annular plate 41 can also be a prefabricated concrete annular plate, and the energy-consuming steel bars 42 are directly cast integrally with the vertical annular plate 41 , which is convenient and quick, and can be mass-produced.

In this embodiment, the damping structure 5 is a tuned mass damper, the tuned mass damper is horizontally arranged between the prefabricated pile body 1 and the damping plate 4 , and one end of the tuned mass damper is connected to the damping plate 4 at one end. The inner wall is fixedly connected, and the other end of the tuned mass damper is fixedly connected with the prefabricated pile body 1 . The tuned mass damper is arranged between each of the vertical annular plates 41 and the prefabricated pile body 1 , so that the force is more balanced and the mutual influence between the vertical annular plates 41 is weakened.

In this embodiment, a circular plate 10 is provided on the outer side of the lower part of the damping plate 4 , the circular plate 10 extends outward in the radial direction of the prefabricated pile body 1 , and a middle part of the circular plate 10 is provided for the damping The central hole 11 of the plate 4 gives way, and the circular plate 10 is slidingly fitted with the damping plate 4 . In this embodiment, the damping plate 4 is used to bear some vertical seismic excitation force. When the earthquake transmits the vertical excitation force upward from the bottom of the circular plate 10, it drives the damping plate 4 to move upward for a small displacement. A third sliding block 12 is fixed on the outside of the lower part of The friction force can offset the excitation force of the earthquake and achieve the effect of energy dissipation and shock absorption.

In this embodiment, the upper end of the circular truncated plate 10 is integrally provided with a truncated cone 14 , and the inclined surface of the truncated cone 14 is inclined toward the side of the damping plate 4 . By arranging the truncated cone 14 , the influence of the radial excitation force on the circular table plate 10 can be reduced, and its acting force can be transferred to the axial direction, which can increase the energy consumption efficiency of the circular table plate 10 .

Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should Various changes may be made in details without departing from the scope of the invention as defined by the claims.

Claims (8)

1. An earthquake-resistant building foundation pile is characterized in that: the pile comprises a prefabricated foundation pile body and a bearing platform fixedly arranged at the upper end of the prefabricated foundation pile body, wherein the bearing platform is positioned above the ground, the prefabricated foundation pile body is positioned below the ground, a bottom plate is arranged at the lower end of the prefabricated foundation pile body, a plurality of damping plates are annularly arranged at the outer side of the prefabricated foundation pile body and are arranged in a ring shape along the circumferential direction at intervals, the damping plates extend downwards along the axial direction of the prefabricated foundation pile body, a damping structure is connected between each damping plate and the base plate body, loam is filled in a space between each damping plate and the prefabricated foundation pile body, a plurality of upper sliding chutes are formed in the bottom of the bearing platform, the upper sliding chutes are uniformly distributed along the circumferential direction of the bearing platform, a first sliding block is fixedly arranged at the upper end of each damping plate and is in sliding fit with the upper sliding chutes, a plurality of lower sliding chutes are formed in the upper surface of the bottom plate, and the, and the lower end of each damping plate is fixedly provided with a second sliding block which is in sliding fit with the lower chute.

2. An earthquake-resistant building foundation pile according to claim 1, wherein: the damping plate is formed by connecting a plurality of vertical circular ring plates in series in sequence along the vertical direction, and two adjacent vertical circular ring plates are connected through energy-consuming steel bars.

3. An earthquake-resistant building foundation pile according to claim 2, wherein: in the damping plate, vertical through holes are formed in the vertical circular ring plates, and each energy-consuming reinforcing steel bar penetrates through all the vertical circular ring plates and is fixedly connected with the vertical circular ring plates.

4. An earthquake-resistant building foundation pile according to claim 3, wherein: the damping structure is a tuned mass damper, the tuned mass damper is horizontally arranged between the prefabricated foundation pile body and the damping plate, one end of the tuned mass damper is fixedly connected with the inner wall of the damping plate, and the other end of the tuned mass damper is fixedly connected with the prefabricated foundation pile body.

5. An earthquake-resistant building foundation pile according to claim 4, wherein: and the tuned mass damper is arranged between each vertical circular ring plate and the prefabricated foundation pile body.

6. An earthquake-resistant building foundation pile according to any one of claims 1 to 5, wherein: the damping pile is characterized in that a circular table plate is arranged on the outer side of the lower portion of the damping plate, the circular table plate extends outwards along the radial direction of the prefabricated foundation pile body, a central hole used for yielding of the damping plate is formed in the middle of the circular table plate, and the circular table plate is in sliding fit with the damping plate.

7. An earthquake-resistant building foundation pile according to claim 6, wherein: the outer side of the lower portion of the damping plate is fixedly provided with a third sliding block, the inner wall of the circular table plate is provided with a vertical sliding groove, and the third sliding block is in sliding fit with the vertical sliding groove.

8. An earthquake-resistant building foundation pile according to claim 7, wherein: the upper end of the circular table plate is integrally provided with a frustum, and the inclined surface of the frustum inclines towards one side of the damping plate.

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