CN212801504U

CN212801504U - Foundation pile structure with adjustable outer diameter

Info

Publication number: CN212801504U
Application number: CN202020204112.XU
Authority: CN
Inventors: 王洲; 王李桐
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-02-25
Filing date: 2020-02-25
Publication date: 2021-03-26
Anticipated expiration: 2030-02-25

Abstract

The utility model discloses a foundation pile structure with adjustable and controllable outer diameter, which comprises a body part, a pointed top part and an expansion part positioned between the body part and the pointed top part; the expansion part has an expandable structure; the expansion part can be expanded outwards under the action of pressure to form a local diameter expansion structure. The application provides a foundation pile structure that external diameter can be regulated and control, simple structure is reasonable, installation convenient to use. The pile end external diameter of having realized the foundation pile through setting up of inflation portion is adjustable, and the inflation portion external diameter grow can increase the area of contact on foundation pile and the holding power layer under the pressure effect, can effectual promotion foundation pile load capacity, is worth using widely by a large scale.

Description

Foundation pile structure with adjustable outer diameter

Technical Field

The utility model relates to a building material technical field especially relates to a foundation pile structure that external diameter can be regulated and control.

Background

The pile foundation is a foundation form with high bearing capacity, wide application range and long history. With the improvement of production level and the development of scientific technology, the type, process, design theory, calculation method and application range of the pile foundation are greatly developed, and the method is widely applied to projects such as high-rise buildings, ports, bridges and the like. The foundation pile is a force transmission component which transmits all or part of the load of a building to foundation soil and has certain rigidity and bending resistance, and the cross section size of the force transmission component is far smaller than the length of the force transmission component. The pile foundation is composed of a plurality of foundation piles (called pile groups) buried in the foundation and a pile platform (called bearing platform) which combines the foundation pile groups to work together. The pile foundation has the function of transferring load to a soil layer with good bearing performance deeper underground so as to meet the requirements of bearing capacity and settlement. The pile foundation has high bearing capacity, can bear vertical load and horizontal load, can resist uplift load and can bear vibration load, and is a deep foundation form which is most widely applied.

When large industrial and civil buildings are built, if the soft soil layer of the foundation is thick, the strength and deformation requirements of the foundation cannot be met by adopting a shallow foundation, and a pile foundation is often adopted. The foundation piles used in the pile foundation can be divided into reinforced concrete precast piles and cast-in-place piles according to the construction method. The prefabricated reinforced concrete pile is prefabricated in concrete prefabricating plant according to the designed size and is driven mechanically into foundation during the construction of building engineering. Sometimes, the construction site and the construction conditions are restricted, and prefabrication cannot be used, at the moment, a pile hole is drilled by a drill bit, then a reinforcement cage is inserted into the pile hole to serve as a framework, and finally concrete is poured into the pile hole. At present, the two pile foundation construction technologies are widely applied to industrial and open-air building engineering. The diameter of the traditional reinforced concrete precast pile from top to bottom is invariable, the outer diameter of the pile end and the upper part are kept equal, and the contact area between the pile end and a bearing layer cannot be adjusted and increased after the pile end is pressed into the ground so as to improve the load capacity of a foundation pile; the traditional cast-in-place pile can enlarge the diameter at the pile end, but the process is complex and the manufacturing cost is high.

SUMMERY OF THE UTILITY MODEL

The utility model provides a foundation pile structure that external diameter can be regulated and control.

The utility model provides a following scheme:

a foundation pile structure with adjustable and controllable outer diameter comprises a body part, a pointed top part and an expansion part positioned between the body part and the pointed top part; the expansion part has an expandable structure; the expansion part can be expanded outwards under the action of pressure to form a local diameter expansion structure.

Preferably: the body portion has a hollow tubular structure; the expansion part comprises a top ring, a plurality of groups of keel components, a bottom ring and a positioning component; the upper part of the top ring is connected with the body part, and the bottom of the bottom ring is connected with the pointed top part; the plurality of groups of keel components are sequentially arranged along the circumferential direction of the top ring and the bottom ring, each group of keel components comprises a first keel and a second keel which are hinged with each other, the upper end of the first keel is hinged with the top ring, the first keel can rotate towards the outer side of the top ring relative to the top ring under the action of pressure, the lower end of the second keel is hinged with the bottom ring, and the second keel can rotate towards the outer side of the bottom ring relative to the bottom ring under the action of pressure; the positioning assembly comprises a plurality of bearing columns and positioning wedges, the bearing columns are distributed along the circumferential direction of the top ring and the bottom ring, at least one part of each bearing column is embedded between the top ring and the bottom ring to form longitudinal support for the top ring and the bottom ring, the positioning wedges are positioned in an inner side space formed by enclosing the bearing columns, and the positioning wedges are used for providing transverse support force for the bearing columns;

each bearing column and each positioning wedge are respectively connected with a pull rope, and the pull ropes extend to the outside of the body part through the top end of the body part.

Preferably: the middle parts of the first keel and the second keel are hinged by adopting shaft pins.

Preferably: the first keel and the two adjacent ends of the second keel are hinged by hinges.

Preferably: the contact part of the lower part of the top ring and the bearing column is provided with a first inclined plane structure, and the contact part of the top of the bearing column and the lower part of the top ring is provided with a second inclined plane structure matched with the first inclined plane structure.

Preferably: the upper end of the first keel is hinged to the top ring through a hinge, and the lower end of the second keel is hinged to the bottom ring through a hinge.

Preferably: a first shoulder is formed on the inner side of the upper part of the top ring along the circumferential direction of the top ring, the outer diameter of the first shoulder is matched with the inner diameter of the body part, and the first shoulder is positioned on the inner side of the body part after the top ring is connected with the body part; the inboard second circular bead that is formed with along its circumference of lower part of foundation ring, the pinnacle portion is formed with fixed annular along its circumference, the external diameter of second circular bead with the internal diameter adaptation of fixed annular, the foundation ring with the pinnacle portion links to each other the back the second circular bead is located the inside of fixed annular.

Preferably: the top ring is connected with the body part in a welding mode, and the bottom ring is connected with the pointed top part in a welding mode.

Preferably: a first external thread is formed on the outer side wall of the first shoulder, a first internal thread matched with the first external thread is formed on the inner side wall of the body part, and the first shoulder is connected with the body part through the first external thread and the first internal thread; the outer side wall of the second shoulder is provided with a second external thread, the outer side wall of the fixing ring groove forms a second internal thread matched with the second external thread, and the second shoulder is connected with the pointed top through the second external thread and the second internal thread.

Preferably: the bottom ring is provided with a height control column with fixed height, the first keel and the second keel are stressed and extruded from top to bottom, and the height control column is used for limiting the distance from the top ring to the bottom ring.

According to the utility model provides a concrete embodiment, the utility model discloses a following technological effect:

through the utility model, a foundation pile structure with adjustable and controllable outer diameter can be realized, and in an implementation mode, the structure can comprise a body part, a pointed top part and an expansion part positioned between the body part and the pointed top part; the expansion part has an expandable structure; the expansion part can be expanded outwards under the action of pressure to form a local diameter expansion structure. The application provides a foundation pile structure that external diameter can be regulated and control, simple structure is reasonable, installation convenient to use. The setting through inflation portion has realized that foundation pile head external diameter is adjustable, and inflation portion external diameter grow can increase the area of contact on foundation pile and the holding power layer under the pressure effect, can effectual promotion foundation pile what bearing capacity, is worth using widely by a large scale.

Of course, it is not necessary for any particular product to achieve all of the above-described advantages at the same time.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a foundation pile structure with an adjustable outer diameter according to an embodiment of the present invention;

fig. 2 is a schematic diagram of an expanded portion of a foundation pile structure with an adjustable outer diameter according to an embodiment of the present invention after compression;

fig. 3 is a partial cross-sectional view of a foundation pile structure with adjustable outer diameter according to an embodiment of the present invention;

figure 4 is a schematic structural view of one manner of a keel assembly provided in accordance with an embodiment of the invention;

figure 5 is a schematic structural view of another mode of a keel assembly according to an embodiment of the invention;

fig. 6 is a schematic view illustrating a negative pressure sand sucking state of the foundation pile structure with an adjustable outer diameter according to the embodiment of the present invention;

fig. 7 is a schematic structural view of a foundation pile structure with an adjustable outer diameter according to an embodiment of the present invention, in which a plurality of expansion portions are provided in a longitudinal direction;

fig. 8 is schematic views of two adjacent groups of installation structures of a foundation pile structure with adjustable and controllable outer diameter according to an embodiment of the present invention;

fig. 9 is another schematic view of two adjacent sets of installation of the foundation pile structure with adjustable outer diameter according to the embodiment of the present invention.

In the figure: the main body part 1, the ogive 2, the expansion part 3, the top ring 31, the first keel 321, the second keel 322, the bottom ring 33, the bearing column 34, the positioning wedge 35, the pull rope 36, the hinge 4, the soft soil layer 5, the holding layer 6 and the suction area 7.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art all belong to the protection scope of the present invention.

Examples

Referring to fig. 1, 2, 3, 4, 5, 6, 7, and 8, in order to provide a foundation pile structure with adjustable outer diameter according to an embodiment of the present invention, as shown in fig. 1, 2, 3, 4, 5, and 6, the structure includes a body portion 1, a pointed portion 2, and an expansion portion 3 located between the body portion 1 and the pointed portion 2; the body portion 1 has a hollow tubular structure; the expansion part 3 has an expansion structure; the expansion part can be expanded outwards under the action of pressure to form a local diameter expansion structure.

The body portion 1 has a hollow tubular structure; the expansion part 3 comprises a top ring 31, a plurality of groups of keel components, a bottom ring 33 and a positioning component; the upper part of the top ring 31 is connected with the body part 1, and the bottom part of the bottom ring 33 is connected with the pointed top part 2; the multiple groups of keel assemblies are sequentially arranged along the circumferential direction of the top ring and the top ring, each group of keel assembly comprises a first keel 321 and a second keel 322 which are hinged with each other, the upper end of the first keel 321 is hinged with the top ring 31, the first keel 321 can rotate towards the outer side of the top ring 31 relative to the top ring 31 under the action of pressure, the lower end of the second keel 322 is hinged with the bottom ring 33, and the second keel 322 can rotate towards the outer side of the bottom ring 33 relative to the bottom ring 33 under the action of pressure; the positioning assembly comprises a plurality of bearing columns 34 and positioning wedges 35, the bearing columns 34 are distributed along the circumferential direction of the top ring 31 and the bottom ring 33, at least one part of each bearing column 34 is embedded between the top ring 31 and the bottom ring 33 to form longitudinal support for the top ring 31 and the bottom ring 33, the positioning wedges 35 are positioned in an inner space formed by enclosing the bearing columns 34, and the positioning wedges 35 are used for providing transverse support force for the bearing columns 34;

wherein, a pulling rope 36 is connected to each of the bearing columns 34 and the positioning wedges 35, and the pulling rope 36 extends to the outside of the body part 1 through the top end of the body part 1.

Further, when determining the manner in which the first keel 321 is hinged to the second keel 322, the determination may be performed according to actual needs, and two different manners may be provided in the embodiment of the present application, where the respective middle portions of the first keel 321 and the second keel 322 are hinged to each other by using a shaft pin. According to the mode, the positioning assembly is continuously pressurized after being taken out of the expansion part, the first keel and the second keel respectively rotate outwards by taking the connection part of the first keel and the connection part of the second keel and the top ring and the bottom ring as a base point, a cross structure is formed, and the diameter of the expansion part is further enlarged. The two adjacent ends of the first keel 321 and the second keel 322 are hinged by hinges 4. According to the mode, after the positioning assembly is taken out of the expansion part, the positioning assembly is continuously pressurized, the first keel and the second keel respectively use the joint with the top ring and the bottom ring as a base point, the first keel and the second keel respectively rotate outwards, the two adjacent ends of the first keel and the second keel protrude outwards together with the hinge to form a structure with a triangular longitudinal section, and then the diameter of the expansion part is enlarged.

Further, in order to ensure that the positioning wedge can be smoothly taken out, a contact part of the lower part of the top ring 31 and the bearing column 34 is provided with a first inclined surface structure, and a contact part of the top of the bearing column 34 and the lower part of the top ring 31 is provided with a second inclined surface structure matched with the first inclined surface structure.

Further, the upper end of the first keel 321 is hinged to the top ring 31 through a hinge 4, and the lower end of the second keel 322 is hinged to the bottom ring 33 through a hinge 4.

Further, a first shoulder is formed on the inner side of the upper portion of the top ring along the circumferential direction of the top ring, the outer diameter of the first shoulder is matched with the inner diameter of the body portion, and the first shoulder is located on the inner side of the body portion after the top ring is connected with the body portion; the inboard second circular bead that is formed with along its circumference of lower part of foundation ring, the pinnacle portion is formed with fixed annular along its circumference, the external diameter of second circular bead with the internal diameter adaptation of fixed annular, the foundation ring with the pinnacle portion links to each other the back the second circular bead is located the inside of fixed annular. When the top ring and the bottom ring are connected with the body part and the pointed top part, the connection mode can be determined according to needs, for example, the top ring is connected with the body part in a welding mode, and the bottom ring is connected with the pointed top part in a welding mode. For another example, a first external thread is formed on an outer side wall of the first shoulder, a first internal thread adapted to the first external thread is formed on an inner side wall of the body, and the first shoulder is connected with the body through the first external thread and the first internal thread; the outer side wall of the second shoulder is provided with a second external thread, the outer side wall of the fixing ring groove forms a second internal thread matched with the second external thread, and the second shoulder is connected with the pointed top through the second external thread and the second internal thread.

In practical application, a gap can be reserved between the first keel and the second keel in the circumferential direction, the first keel and the second keel are slightly obliquely crossed, the keel assembly is not completely straight, the middle of the keel assembly slightly protrudes outwards and slightly protrudes, the positioning assembly is pulled out after the structure is integrally pressed to an underground target position, sand and stones around the expansion part are sucked out by using a negative pressure air pump, a cavity is formed around the expansion part, the body part is pressed downwards to the expansion part to expand the outer diameter, the reinforcement cage is placed into the expansion part after the outer diameter is expanded to a target value, then concrete is poured into the periphery of the expansion part and the interior of the expansion part under high pressure, the body part is pressed downwards after the body part is filled with the concrete, and after the concrete is solidified with the keel assembly, the height control column, the reinforcement cage, the top ring, the bottom ring and the pointed top part under high pressure, a firm reinforced concrete structure with. A gap is reserved between the first keel and the second keel, so that sand and stones on the periphery of the expansion part can be conveniently sucked by the negative pressure air pump. First fossil fragments and second fossil fragments are the oblique crossing slightly, and the fossil fragments subassembly is not completely straight, and the centre is outwards outstanding slightly, can make things convenient for first fossil fragments and second fossil fragments to be pressed the back and rotate the outside.

The structure that this application provided can adopt and process the holistic mode of formation in the mill when using, also can adopt this body part, pinnacle portion and inflation portion to carry out the mode of preprocessing field assembly respectively, and the mode of adopting field assembly has advantages such as convenient transportation.

The following will describe each component in detail by taking a mode of assembling each component on site as an example. Firstly, processing the expansion part in a factory to form a prefabricated part, transporting the processed expansion part to a construction site during construction, firstly connecting the bottom ring with the pointed top part on the construction site, inserting the bottom ring into a fixing groove of the pointed top part if the bottom ring is not provided with threads, and then welding the bottom ring with the pointed top part. If the bottom ring is provided with external threads, the bottom ring can be connected with the pointed top part in a threaded connection mode. And then the pull rope of the positioning assembly is pulled out through the cavity of the body part, and the body part and the expansion part are assembled in the same way as the bottom ring and the pointed top part. And after the assembly is finished, the foundation pile can be pressed into the ground. During the construction, with sharp top and ground contact, the press pressurizes via this somatic part top, pressure transmits for the apical ring through this somatic part, the apical ring transmits many spandrels of pressure through locating component for the foundation ring, the foundation ring transmits pressure for sharp top gets into ground downwards, reach the position of below ground reservation until sharp top, at whole pressurization in-process, the spandrel column can not be extruded by between apical ring and the foundation ring under the effect of locating wedge, can prevent to take place deformation between first fossil fragments and the second fossil fragments. After the pointed top reaches a preset position, the positioning wedge and the bearing column are sequentially pulled out from the top end of the cavity of the body through the pull rope, secondary pressure is continuously applied to the body, because no support is arranged between the top ring and the bottom ring, the pressure transmitted to the top ring by the body cannot be directly transmitted to the bottom ring, so that the pressure of the top ring can act on the first keel, the first keel is hinged with the second keel, the first keel is hinged with the top ring, the second keel is hinged with the bottom ring, the top ring moves the first keel and the second keel to the bottom ring, the first keel and the second keel can protrude outwards in the circumferential direction of the body to rotate, the diameter of the deformed expansion part can be effectively increased, after the secondary pressure application is finished, as shown in figure 6, gravels in the expansion part and around the keel assembly are cleaned by using a negative pressure gas pump, a reinforcement cage is placed after cleaning, and concrete is poured into the expansion part through the cavity of the body, after the concrete and the keel assembly, the height control column, the reinforcement cage, the top ring, the bottom ring and the pointed top are solidified, a firm reinforced concrete structure is formed. When the structure is adopted for secondary pressure application, the descending height of the body part can be controlled according to the requirement, and the length and the connecting position of the first keel and the second keel are determined, so that the expansion size of the expansion part can be estimated through the descending height of the body part. For example, in the case of a pile having an outer diameter of 500 mm, if the lengths of the first keel and the second keel are both 300 mm, the first keel and the second keel protrude outward by 30 degrees when connected to each other at two adjacent ends of the first keel and the second keel, and the outer diameter is increased outward by about 150 mm, the base area can be increased by more than 1.5 times. The bottom ring 33 is provided with a height control column with a fixed height, the first keel 321 and the second keel 322 are stressed to be pressed up and down, and the height control column is used for limiting the minimum distance from the top ring 31 to the bottom ring 33.

It is envisaged that in actual use the body portion may be provided in a multi-section combination, as shown in figure 7, and a set of such inflatable portions may be provided between adjacent sections to further increase the contact area with the periphery thereof. The bottom ring of the expansion part between two adjacent body parts should have a solid structure to prevent the concrete from falling. As shown in fig. 8 and 9, when the structure is used side by side, the distance between the body parts can be determined by calculating the expanded diameter of the expansion parts, so that after the expansion parts are expanded, the expansion parts of two adjacent groups of the structure are mutually connected, intersected or even overlapped, and an integral structure is formed after pouring is carried out, thereby ensuring that the obtained pile foundation is more stable.

In a word, the foundation pile structure that the external diameter can be regulated and control that this application provided, simple structure is reasonable, installation convenient to use. The setting through inflation portion has realized that foundation pile stake end external diameter is adjustable, and inflation portion external diameter grow can increase the area of contact on foundation pile and the holding power layer under the pressure effect, can effectual promotion foundation pile load capacity, is worth using widely by a large scale.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.

Claims

1. A foundation pile structure with adjustable and controllable outer diameter is characterized by comprising a body part, a pointed top part and an expansion part positioned between the body part and the pointed top part; the expansion part has an expandable structure; the expansion part can be expanded outwards under the action of pressure to form a local diameter expansion structure.

2. The adjustable outer diameter foundation pile structure of claim 1, wherein the body portion has a hollow tubular configuration; the expansion part comprises a top ring, a plurality of groups of keel components, a bottom ring and a positioning component; the upper part of the top ring is connected with the body part, and the bottom of the bottom ring is connected with the pointed top part; the plurality of groups of keel components are sequentially arranged along the circumferential direction of the top ring and the bottom ring, each group of keel components comprises a first keel and a second keel which are hinged with each other, the upper end of the first keel is hinged with the top ring, the first keel can rotate towards the outer side of the top ring relative to the top ring under the action of pressure, the lower end of the second keel is hinged with the bottom ring, and the second keel can rotate towards the outer side of the bottom ring relative to the bottom ring under the action of pressure; the positioning assembly comprises a plurality of bearing columns and positioning wedges, the bearing columns are distributed along the circumferential direction of the top ring and the bottom ring, at least one part of each bearing column is embedded between the top ring and the bottom ring to form longitudinal support for the top ring and the bottom ring, the positioning wedges are positioned in an inner side space formed by enclosing the bearing columns, and the positioning wedges are used for providing transverse support force for the bearing columns;

3. The foundation pile structure with adjustable and controllable outer diameter according to claim 2, wherein the first keel and the second keel are hinged at their respective middle portions by using a shaft pin.

4. The foundation pile structure with the adjustable outer diameter according to claim 2, wherein two adjacent ends of the first keel and the second keel are hinged by hinges.

5. The foundation pile structure with adjustable and controllable outer diameter according to claim 2, wherein a contact portion of the lower portion of the top ring and the bearing column has a first slope structure, and a contact portion of the top of the bearing column and the lower portion of the top ring has a second slope structure adapted to the first slope structure.

6. The foundation pile structure with the adjustable outer diameter according to claim 2, wherein the upper end of the first keel is hinged to the top ring through a hinge, and the lower end of the second keel is hinged to the bottom ring through a hinge.

7. The adjustable-outer-diameter foundation pile structure according to claim 2, wherein a first shoulder is formed on an inner side of an upper portion of the top ring along a circumferential direction thereof, an outer diameter of the first shoulder is adapted to an inner diameter of the body portion, and the first shoulder is located on an inner side of the body portion after the top ring is coupled to the body portion; the inboard second circular bead that is formed with along its circumference of lower part of foundation ring, the pinnacle portion is formed with fixed annular along its circumference, the external diameter of second circular bead with the internal diameter adaptation of fixed annular, the foundation ring with the pinnacle portion links to each other the back the second circular bead is located the inside of fixed annular.

8. The adjustable outer diameter foundation pile structure of claim 7, wherein said top ring is connected to said body portion by welding and said bottom ring is connected to said pointed top portion by welding.

9. The adjustable-outer-diameter foundation pile structure according to claim 7, wherein an outer side wall of the first shoulder is formed with a first external thread, an inner side wall of the body is formed with a first internal thread adapted to the first external thread, and the first shoulder is connected to the body through the first external thread and the first internal thread; the outer side wall of the second shoulder is provided with a second external thread, the outer side wall of the fixing ring groove forms a second internal thread matched with the second external thread, and the second shoulder is connected with the pointed top through the second external thread and the second internal thread.

10. The foundation pile structure with the adjustable and controllable outer diameter according to claim 2, wherein a height control column with a fixed height is arranged on the bottom ring, the first keel and the second keel are pressed up and down under stress, and the height control column is used for limiting the approaching distance of the top ring to the bottom ring.