CN216615807U

CN216615807U - Static pressure expansion pile

Info

Publication number: CN216615807U
Application number: CN202122572591.8U
Authority: CN
Inventors: 程德东; 陈东; 霍宏斌
Original assignee: Suzhou Liji Environmental Protection Technology Co ltd
Current assignee: Suzhou Liji Environmental Protection Technology Co ltd
Priority date: 2021-10-25
Filing date: 2021-10-25
Publication date: 2022-05-27
Anticipated expiration: 2031-10-25

Abstract

The utility model relates to a static pressure expansion pile, which comprises a pipe pile, an annular connecting disc, a plurality of expansion bodies, a transmission structure, a plurality of connecting rods and a pile head, wherein: one side of two opposite sides of the connecting disc is fixedly connected with the end part of the tubular pile, and a plurality of expansion bodies are distributed on the other side of the connecting disc along the circumferential direction of the tubular pile and can be rotatably connected with the expansion bodies along a first axis which is perpendicular to the axial direction of the tubular pile and the radial direction of the position of the expansion body; the connecting rods are distributed along the circumferential direction of the tubular pile, one end of each connecting rod is fixed to one side, away from the tubular pile, of the connecting plate, and the other end of each connecting rod extends out of one side, away from the connecting plate, of the expansion body and is fixedly connected with the pile head; the transmission structure is arranged in the tubular pile, is connected with the expansion body and is used for driving the expansion body to deflect towards the direction far away from the axis of the tubular pile when being pressed; the construction period is shortened by prefabricating and processing parts; the expansion body forms "expansion bolts" effect in soil, and withdrawal resistance is great, and applicable in the building in collapsible loess area, the upper portion load is great, and bears 360 wind loads for a long time.

Description

Static pressure expansion pile

Technical Field

The utility model relates to the technical field of foundation engineering, in particular to a static pressure expansion pile.

Background

In the technical field of foundation engineering, the foundation of the buried structure can resist uplift force by means of self weight, and is widely applied to agricultural facilities, photovoltaic power generation and municipal engineering, in particular to an electric power iron tower. As the safe and stable operation of the power transmission line is an important guarantee of the power system, and the foundation of the soil-entry structure of the power iron tower is used as the premise of the safe operation of the power transmission line, the quality of the power iron tower is directly related to whether the power transmission line can normally operate.

At present, the height of an electric iron tower is usually dozens of meters or even hundreds of meters, the foundation of an underground structure of the electric iron tower usually bears repeated load of 360 degrees, and the load has large eccentric stress. Existing soil structure foundations are of the following type, type one: the gravity type independent foundation can improve the self weight and further improve the pulling resistance by increasing the concrete consumption, but has high manufacturing cost and poor capability of resisting extreme working conditions; type two: the pile foundation has a relatively simple structure, but is higher in manufacturing cost and difficult to maintain. And the two types of foundation of the soil-entering structure are cast in situ at the present stage, so that the construction period is long, the construction condition is severe, the engineering quality cannot be guaranteed, the pre-installation performance is poor and the like. In addition, with the further increase of the south delivery scale of the northern electricity and the east delivery scale of the western electricity, the two types of soil-entering structure foundations cannot be suitable for severe environments such as collapsible loess and soft geological conditions.

Therefore, it is important to provide a prefabricated foundation for an embedded structure, which is suitable for severe environments such as collapsible loess and soft geological conditions.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide a static pressure expansion pile which is applicable to severe environments such as collapsible loess and soft geological conditions, and which has a short construction period and a low cost.

The utility model provides a static pressure expansion pile, which comprises a pipe pile, an annular connecting disc, a plurality of expansion bodies, a transmission structure, a plurality of connecting rods and a pile head, wherein:

one side of two opposite sides of the connecting disc is fixedly connected with the end part of the tubular pile, and a plurality of expansion bodies are distributed on the other side of the connecting disc along the circumferential direction of the tubular pile and can be rotatably connected with the expansion bodies along a first axis which is perpendicular to the axial direction of the tubular pile and the radial direction of the position of the expansion bodies;

the connecting rods are distributed along the circumferential direction of the tubular pile, one end of each connecting rod is fixed to one side, away from the tubular pile, of the connecting plate, and the other end of each connecting rod extends to one side, away from the connecting plate, of the expansion body and is fixedly connected with the pile head;

the transmission structure sets up in the tubular pile, and with the inflation body is connected for the drive when pressurized the inflation body is towards keeping away from tubular pile axis direction deflects.

In the static pressure expansion pile, all parts are prefabricated and processed through a factory and transported to a construction site for installation, so that the process of on-site pouring is greatly reduced, the construction period can be shortened, the maintenance time and period are not required to be considered, and the engineering quality can be ensured. The installed static pressure expansion pile can be directly arranged on the soil surface of a collapsible loess area and applies force to the pile, the pipe pile drives the connecting disc, the connecting rod, the expansion body and the pile head to move downwards along with the pipe pile head, the collapsible loess is impacted by the pile head, the static pressure expansion pile extends into the soil, the force application of the pipe pile is stopped when the whole static pressure expansion pile descends to a set depth, then the force transmission piece is placed in the pipe pile and applies force to the force transmission piece, the force transmission piece moves downwards to be abutted against the transmission structure, the transmission structure moves downwards along with the pressure, the expansion body is driven to rotate around the first axis relative to the connecting disc so that the expansion body deflects towards the direction far away from the axis of the pipe pile, the expansion body expands outwards in the soil, the soil between the soil surface and the expansion body forms the effect of an expansion bolt, and then larger pulling resistance is generated, and then the static pressure expansion pile is filled with concrete, finishing the construction, relative to the existing foundation of the soil-entering structure, the foundation does not need to be excavated, has smaller weight, does not need heavy equipment to be installed, has more convenient and fast installation and lower manufacturing cost, is suitable for the high-rise buildings in collapsible loess areas, has larger upper load, can bear the action of 360-degree wind load for a long time, has high safety, large embedding depth, strong integrity and good stability, can bear larger axial compression resistance and axial pulling resistance load, and has less influence on the adjacent buildings during the construction.

In one embodiment, the transmission structure comprises an expansion bolt and a plurality of connecting plates, wherein:

the expansion bolt is arranged in the tubular pile and can penetrate through the inner space of the connecting disc;

the connecting plate is respectively connected with the expansion bolt and the expansion body in a rotating mode along a direction parallel to the first axis.

In the static pressure expansion pile, the expansion bolt moves downwards to drive the connecting plate to move downwards, and the connecting plate and the expansion body rotate around the first axis so as to more conveniently push the expansion body to deflect along the direction away from the axis of the pipe pile, and the expansion body is opened outwards in soil.

In one embodiment, the expansion bolt comprises a connecting seat and a plurality of first plate bodies, wherein the first plate bodies are embedded in the connecting seat and provided with extending ends extending out of the connecting seat, and the extending ends and the connecting plate are rotatably connected into a whole through a first rotating shaft.

In the static pressure expansion pile, the connecting seat is acted by a downward force to drive the first plate body to move downwards, and the connecting plate is driven by the first rotating shaft to move downwards and rotate around the first axis, so that the expansion body is pushed to deflect along the direction far away from the axis of the pipe pile conveniently.

In one embodiment, the connecting seat includes two first flanges and a first concrete, and the first plate includes two first steel plates, wherein:

the two first flange plates are oppositely arranged, and a plurality of first through holes are formed in each first flange plate;

the two first steel plates are arranged in the first through holes at intervals, one end of each first steel plate is welded with the inner wall of each first through hole, the other end of each first steel plate is provided with a second through hole, and the end parts of the two first steel plates, which are provided with the second through holes, form the extending ends;

the first concrete fills the two first flanges and does not exceed the outer contours of the first flanges;

the connecting plates are embedded in the two first steel plates, and the embedded ends of the connecting plates are provided with third through holes;

the first pin shaft penetrates through the second through hole and the third through hole and integrally connects the first steel plate and the connecting plate.

In the static pressure expansion pile, a first steel plate is welded with a first through hole so as to realize the fixed connection of the first steel plate and two first flange plates, and first concrete is filled in the two first flange plates so as to form a connecting seat more conveniently; the connecting plate inlays to be established in two first steel sheets to first round pin axle runs through second through-hole and third through-hole, with the rotation that realizes between first steel sheet and the connecting plate comparatively simply conveniently is connected.

In one embodiment, a fourth through hole is formed in the middle of the expansion body, the axis of the fourth through hole is parallel to the first axis, a fifth through hole is formed in one end, away from the first steel plate, of the connecting plate, and the connecting plate is connected with the expansion body into a whole through a second pin shaft penetrating through the fourth through hole and the fifth through hole.

In the static pressure expansion pile, the second pin shaft penetrates through the fourth through hole and the fifth through hole, so that the rotary connection between the expansion body and the connecting plate is realized simply and conveniently.

In one embodiment, the transmission structure is a second plate body, and the second plate body is fixed on one side of the expansion body close to the axis of the tubular pile.

In above-mentioned static pressure inflation stake, the force of application is downwards in the tubular pile, and the second plate body receives decurrent effort to push the inflation body more conveniently and deflect towards keeping away from tubular pile axis direction, the inflation body outwards opens in soil, and simple structure.

In one embodiment, the second plate body and the expansion body are integrally formed, so that the second plate body and the expansion body are fixedly arranged, and the structure is simple.

In one of them embodiment, the side that the second plate body is close to the tubular pile is the inclined plane, along the direction towards the tubular pile axis, the inclined plane is kept away from gradually the tubular pile.

In the static pressure expansion pile, the force is applied downwards in the pipe pile, and the second plate body is applied with the obliquely downward acting force so as to deflect the expansion body towards the direction far away from the axis of the pipe pile conveniently.

In one of them embodiment, the connection pad is the second ring flange, the tubular pile includes the body and the fixed third ring flange that sets up in body one side, the third ring flange with the second ring flange passes through the connecting pin fixed as an organic whole.

In the static pressure expansion pile, the third flange plate and the second flange plate are fixed into a whole through the connecting pin, so that the fixed connection between the tubular pile and the connecting plate is conveniently realized, and the structure is simple.

In one embodiment, the expansion body and the connecting disc are connected through a connecting structure, the connecting structure comprises a second rotating shaft and a third plate body, wherein:

the second flange plate is uniformly provided with a plurality of sixth through holes along the circumferential direction;

one end of the third plate body is arranged in the sixth through hole and welded with the inner wall of the sixth through hole, and the other end of the third plate body extends out of the sixth through hole and is provided with a seventh through hole;

an eighth through hole is formed in the end portion of the expansion body, and the seventh through hole and the eighth through hole are connected with the third plate body into a whole through a second rotating shaft penetrating through the seventh through hole and the eighth through hole.

In the static pressure expansion pile, the third plate body is welded with the sixth through hole to realize the fixed connection of the third plate body and the second flange, and the second rotating shaft penetrates through the seventh through hole and the eighth through hole to realize the rotary connection between the third plate body and the expansion body simply and conveniently.

In one embodiment, a plurality of ninth through holes are uniformly formed in the second flange plate along the circumferential direction of the second flange plate, the ninth through holes and the sixth through holes are located on the circumference of the same radius, the ninth through holes are located between every two adjacent sixth through holes, one end of each connecting rod is arranged in each ninth through hole and welded to the inner wall of each ninth through hole, and the other end of each connecting rod is welded to the pile head.

In the static pressure expansion pile, one end of the connecting rod is welded with the ninth through hole, and the other end of the connecting rod is welded with the pile head, so that the connecting rod, the second flange plate and the pile head are fixedly connected simply and conveniently.

Drawings

Fig. 1 is a schematic structural view of a static pressure expansion pile provided by the present invention;

FIG. 2 is another schematic structural view of a static pressure expansion pile according to the present invention;

FIG. 3 is a cross-sectional view of the hydrostatically expandable pile of FIG. 1 at position A-A;

FIG. 4 is a cross-sectional view of the hydrostatically expandable pile of FIG. 1 at position B-B;

FIG. 5 is a schematic diagram of the static pressure expansion pile of FIG. 1 after assembly;

FIG. 6 is a cross-sectional view of the hydrostatically expandable pile of FIG. 2 at position D-D;

FIG. 7 is a cross-sectional view of the hydrostatically expandable pile of FIG. 2 at position E-E;

FIG. 8 is a schematic diagram of the static pressure expansion pile of FIG. 2 after assembly;

FIG. 9 is a cross-sectional view of the hydrostatically expandable pile of FIG. 1 at position C-C;

fig. 10 is a cross-sectional view of the hydrostatically expandable pile of fig. 2 at position F-F.

Reference numerals:

10. static pressure expansion pile;

100. a tubular pile; 110. a tube body; 111. reinforcing steel bars; 120. a third flange plate; 121. a groove; 130. a connecting pin;

200. a connecting disc;

300. an expansion body;

400. a transmission structure; 410. an expansion bolt; 411. a connecting seat; 4111. a first flange plate; 4112. a first concrete; 4113. a first pin shaft; 412. a first plate body; 4121. a first steel plate; 420. a connecting plate; 430. a second pin shaft; 440. a second plate body;

500. a connecting rod;

600. pile head;

700. an outer steel tube;

800. a connecting structure; 810. a second rotating shaft; 820. a third plate body.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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.

The technical scheme provided by the embodiment of the utility model is described below by combining the accompanying drawings.

As shown in fig. 1 and 2, the present invention provides a static pressure expansion pile 10, which is applied to soil foundation treatment in severe environments such as collapsible loess and soft geological conditions, wherein the static pressure expansion pile 10 comprises a pipe pile 100, an annular connecting disc 200, a plurality of expansion bodies 300, a transmission structure 400, a plurality of connecting rods 500 and a pile head 600, wherein:

the connecting disc 200 has two opposite side surfaces, one of the two opposite side surfaces is fixedly connected with the end part of the tubular pile 100, the other of the two opposite side surfaces is distributed with a plurality of expansion bodies 300 along the circumferential direction of the tubular pile 100, the one side of the connecting disc 200 is connected with the expansion bodies 300, and the expansion bodies 300 can rotate along a first axis relative to the connecting disc 200, and the first axis is perpendicular to the axial direction of the tubular pile 100 and the radial direction of the position of the expansion bodies 300; in a specific arrangement, the number of the expansion bodies 300 may be two, three, four or more than four, and the expansion bodies 300 are uniformly distributed along the circumferential direction of the tubular pile 100, so that the expansion bolt 410 is uniformly stressed in the using process.

A plurality of connecting rods 500 are distributed along the circumferential direction of the tubular pile 100, one end of each connecting rod 500 is fixed on one side of the connecting disc 200 far away from the tubular pile 100, the other end of each connecting rod 500 extends out to one side of the expansion body 300 far away from the connecting disc 200, and the extending end of each connecting rod 500 is fixedly connected with the pile head 600; when the expansion bolt 410 is specifically arranged, the number of the connecting rods 500 can be two, three, four or more than four, and the connecting rods 500 are uniformly distributed along the circumferential direction of the tubular pile 100, so that the stress of the expansion bolt 410 is uniform in the use process; and the pile head 600 is a conical structure, which can be a conical cylinder, a conical table or a special-shaped structure with a tip part, and the small end of the conical structure is located on the side of the large end far away from the tubular pile 100.

The transmission structure 400 is arranged in the tubular pile 100, and the transmission structure 400 is connected with the expansion body 300, and the transmission structure 400 is used for driving the expansion body 300 to deflect away from the axial direction of the tubular pile 100 when being pressed.

In the static pressure expansion pile 10, all parts are prefabricated and processed in a factory and transported to a construction site for installation, so that the procedures required for casting in the site are greatly reduced, the construction period can be shortened, the maintenance time and period are not required to be considered, and the engineering quality can be ensured. The installed static pressure expansion pile 10 can be directly arranged on the soil surface of a collapsible loess area and applies force to the pile 100, the pile 100 drives the connecting disc 200, the connecting rod 500, the expansion body 300 and the pile head 600 to move downwards, the pile head 600 impacts collapsible loess to enable the static pressure expansion pile 10 to penetrate into the soil, the force application of the pile 100 is stopped when the whole static pressure expansion pile 10 descends to a set depth, then a force transmission piece is placed in the pile 100 and applies force to the force transmission piece, the force transmission piece moves downwards to be abutted against the transmission structure 400, the transmission structure 400 moves downwards along with the pressure, the expansion body 300 is driven to rotate around a first axis relative to the connecting disc 200, so that the expansion body 300 deflects towards the direction away from the axis of the pile 100, the expansion body 300 expands outwards in the soil, the effect of an expansion bolt is formed by the soil between the soil surface and the expansion body 300, and then a larger pulling resistance is generated, then fill the concrete in the static pressure expansion pile 10, finish the construction, compared with the existing foundation of the buried structure, do not need to excavate, the weight is smaller, do not need heavy equipment to install, it is comparatively convenient and fast to install, the fabrication cost is lower, can be suitable for the high-rise building in the collapsible loess area, the upper portion load is bigger, and bear the effect of 360 wind loads for a long time, the security is high, the embedding depth is big, the wholeness is strong, the stability is good, can bear bigger axle center resistance to compression and axle center resistance to plucking load, the construction has less influence to neighbouring building.

The transmission structure 400 has various structural forms, two embodiments of the static pressure expansion piles 10 are provided according to the utility model for different transmission structures 400, fig. 1 is a structural schematic diagram of the static pressure expansion pile 10 of the first embodiment, and fig. 2 is a structural schematic diagram of the static pressure expansion pile 10 of the second embodiment. In a first embodiment, as shown in fig. 1, 3 and 4, a preferred embodiment, the transmission structure 400 includes expansion bolts 410 and a plurality of connecting plates 420, the number of the connecting plates 420 corresponds to the number of the expansion bodies 300, and in a specific arrangement, the number of the connecting plates 420 may correspond to one-to-one of the expansion bodies 300, or the number of the connecting plates 420 may be twice the number of the expansion bodies 300, and in the transmission structure 400:

the expansion bolt 410 is arranged in the pipe pile 100, and the expansion bolt 410 may penetrate through the inner space of the connection plate 200; in a specific arrangement, the maximum outer contour dimension of the expansion bolt 410 is smaller than the inner contour dimension of the pipe pile 100, and when the expansion bolt 410 is acted by an external force, the expansion bolt 410 can move downwards in the pipe pile 100 under the action of the external force and further move downwards through the inner space of the connecting disc 200.

The connecting plate 420 is connected to the expansion bolt 410, and the connecting plate 420 is rotatable relative to the expansion bolt 410 parallel to the first axis, and the connecting plate 420 is connected to the expansion body 300, and the expansion body 300 is rotatable relative to the connecting plate 420 parallel to the first axis.

In the static pressure expansion pile 10, when the external force acts on the static pressure expansion pile, the expansion bolt 410 moves downwards, the expansion bolt 410 drives the connecting plate 420 to move downwards, the connecting plate 420 applies force to the expansion body 300 under the external force, so that the connecting plate 420 and the expansion body 300 can rotate around the first axis, the expansion body 300 is pushed to deflect along the direction far away from the axis of the pipe pile 100, the transmission structure 400 is simple in structure, deflection of the expansion body 300 can be conveniently achieved, and the expansion body 300 can be rapidly and stably opened outwards in soil.

In order to simplify the expansion bolt 410, specifically, as shown in fig. 1, 3 and 4, the expansion bolt 410 includes a connection seat 411 and a plurality of first plate bodies 412, the first plate bodies 412 may correspond to the connection plates 420 one by one, and the number of the first plate bodies 412 may be two, three, four or more; the first plate 412 is embedded in the connection holder 411, and the first plate 412 has a protruding end protruding out of the connection holder 411, the protruding end and the connection plate 420 are connected as a whole through a first rotation shaft, and the first rotation shaft is rotatable with respect to the protruding end while the first rotation shaft is rotatable with respect to the connection plate 420.

In the static pressure expansion pile 10, when the connecting seat 411 is acted by a downward external force, the connecting seat 411 drives the first plate 412 to move downward, the first plate 412 drives the connecting plate 420 to move downward, the connecting plate 420 moves downward under the driving of the first rotating shaft and applies a force to the expansion body 300, so that the connecting plate 420 and the expansion body 300 can rotate around the first axis, and the expansion body 300 is more conveniently pushed to deflect along the direction away from the axis of the pipe pile 100; the expansion bolt 410 is simple in structure, easy to prefabricate in a factory and low in production cost.

To further simplify the expansion bolt 410, as shown in fig. 1, 3 and 4, more specifically, the connecting seat 411 includes two first flanges 4111 and a first concrete 4112, and the first plate 412 includes two first steel plates 4121, wherein:

two first ring flanges 4111 are arranged relatively along the axial direction thereof, and each first ring flange 4111 is provided with a plurality of first through holes along the circumferential direction thereof, the first through holes penetrate through the first ring flange 4111 along the axial direction of the first ring flange 4111, the number of the first through holes can be two, three, four or more than four, and the plurality of first through holes are uniformly distributed in the circumferential direction of the first ring flange 4111.

Two first steel plates 4121 are disposed at a first through hole, and the two first steel plates 4121 are spaced apart from each other by a predetermined distance; along the axial direction of the first flange 4111, one end of the first steel plate 4121 is welded with the inner wall of the first through hole, the other end of the first steel plate 4121 extends out of the first through hole, a second through hole is formed in the end part, and the axial line of the second through hole is parallel to the first axial line; the end portions of the two first steel plates 4121 having the second through holes form protruding ends.

The first concrete 4112 fills the two first flanges 4111, and the first concrete 4112 does not exceed the outer contour of the first flanges 4111; in a specific arrangement, the first concrete 4112 is filled inside each flange, the first concrete 4112 is further filled in a gap between two first flanges 4111, and the first concrete 4112 is further filled in the first through hole.

The connecting plate 420 is embedded in the two first steel plates 4121, and a third through hole is formed at the embedded end of the connecting plate 420, and the axis of the third through hole is parallel to the first axis.

The first pin 4113 penetrates through the second through hole and the third through hole, and the first pin 4113 connects the first steel plate 4121 and the connecting plate 420 into a whole; when the first hinge pin 4113 is specifically arranged, two end portions of the first hinge pin 4113 are fixed by pins, and the first hinge pin 4113 forms a first rotating shaft.

In the static pressure expansion pile 10, the first steel plate 4121 is fixedly connected with the two first flanges 4111 by placing the two first steel plates 4121 in one first through hole and welding the first steel plate 4121 with the first through hole, and the first concrete 4112 fills the two first flanges 4111 to form the connecting seat 411 more conveniently; the connecting plate 420 is embedded in the two first steel plates 4121, and the first pin 4113 penetrates through the second through hole and the third through hole, so that the first steel plates 4121 and the connecting plate 420 can be connected in a rotating manner simply and conveniently; the expansion bolt 410 is simple in structure, common in preparation materials, easy to perform in a factory, and further reduces the production cost. Of course, the first steel plate 4121 may not be welded to the first through hole, and the first steel plate 4121 may be directly disposed in the first through hole, and the first steel plate 4121 may be fixedly connected to the first through hole by casting the first concrete 4112 in the first through hole.

In order to facilitate the rotational connection between the expansion body 300 and the connection plate 420, as shown in fig. 1, more specifically, a fourth through hole is provided at a middle position of the expansion body 300, an axis of the fourth through hole is parallel to the first axis, a fifth through hole is provided at an end of the connection plate 420 far from the first steel plate 4121, and the connection plate 420 is connected with the expansion body 300 as a whole by a second pin 430 penetrating the fourth through hole and the fifth through hole, the second pin 430 is rotatable in the fourth through hole, and the second pin 430 is rotatable in the fifth through hole.

In the static pressure expansion pile 10, the second pin 430 penetrates through the fourth through hole and the fifth through hole, so that the rotary connection between the expansion body 300 and the connecting plate 420 can be realized more simply and conveniently. In the specific arrangement, the fourth through hole may be arranged at the middle position of the expansion body 300, and the fourth through hole may also be arranged at one side of the middle position of the expansion body 300 far away from the tubular pile 100; after the second pin 430 penetrates through the fourth through hole and the fifth through hole, two end portions of the second pin 430 are fixed by pins.

The construction method and effects of the static pressure expansion pile 10 in the first embodiment are as follows:

as shown in fig. 5, first, all the components are prefabricated at the factory; then all the parts are transported to a construction site, and the static pressure expansion pile 10 is assembled and welded on the ground of the site; then, the static pressure expansion pile 10 is directly fixed, and the impact collapsible loess of the pile head 600 enables the whole static pressure expansion pile 10 to move downwards; then, when the expansion bolt 410 reaches the designed depth, the tubular pile 100 is fixed, and the external steel pipe 700 is adopted to apply pressure to the connecting seat 411, so that the purpose of expanding the expansion body 300 is achieved; then, when the expansion body 300 is expanded to a designed angle, the pressurization is stopped, and concrete is filled in the inner gap of the static pressure expansion pile 10; and finally, after the concrete is cured for a period of time, taking out the external steel pipe 700, continuously filling the concrete into the pipe pile 100, and curing to reach the specification.

After the expansion body 300 is expanded to a design angle and filled with concrete, the bearing capacity of the foundation structure can be improved through the expansion head principle. The static pressure expansion pile 10 can further provide uplift bearing capacity and compression bearing capacity transmitted by a high-rise structure on the upper portion of the static pressure expansion pile 10 on the basis of solving the loess collapsibility geological disaster, in the aspect of bearing characteristics, the end bearing area can be increased by opening the expansion body 300, and the collapsibility of the bottom of the axis of the foundation can be solved by filling concrete, so that the integrity of the foundation is enhanced, and the uplift and compression bearing capacity of the foundation is improved.

The structure of the transmission structure 400 has various forms, and in the second embodiment, as shown in fig. 2, 6 and 7, in a preferred embodiment, the transmission structure 400 is a second plate body 440, and the second plate body 440 is fixed on one side of the expansion body 300 close to the axis of the pipe pile 100. In a specific arrangement, the second plate 440 has a plate-like structure in the form of a strip, a sector, or the like, and the fixed connection between the second plate 440 and the expansion body 300 may be welding, riveting, or fastening, which is not limited to this, but may also be other manners that can meet the requirements.

In the static pressure expanding pile 10, a force is applied downwards in the pipe pile 100, the second plate body 440 is applied with a downward force so as to push the expanding body 300 to deflect towards the direction away from the axis of the pipe pile 100 conveniently, the expanding body 300 is expanded outwards in the soil, the structure of the transmission structure 400 is simple, and the deflection of the expanding body 300 can be realized conveniently, so that the expanding body 300 can be expanded outwards in the soil quickly and stably.

In order to simplify the structure of the static pressure expansion pile 10, as shown in fig. 2, in particular, the second plate body 440 is integrally formed with the expansion body 300, so that the second plate body 440 and the expansion body 300 are fixedly disposed, and the structure is simple. In a specific configuration, second plate 440 and expansion body 300 may be integrally formed by injection molding, casting, or the like, and of course, the integrally forming process between second plate 440 and expansion body 300 is not limited thereto, and may be other manners capable of meeting the requirements.

In order to facilitate the deflection of the expansion body 300, as shown in fig. 2, specifically, the side of the second plate body 440 close to the tube pile 100 is a slope, and the slope is gradually away from the tube pile 100 in the direction toward the axis of the tube pile 100.

In the static pressure expansion pile 10, a downward force is applied to the tubular pile 100, the second plate 440 receives a downward oblique force, and the second plate 440 drives the expansion body 300 to move therewith, so that the expansion body 300 can be conveniently deflected towards the direction away from the axis of the tubular pile 100, the transmission structure 400 is simple in structure, and the deflection of the expansion body 300 can be more conveniently realized.

The construction method and effects of the static pressure expansion pile 10 in the second embodiment are as follows:

as shown in fig. 8, first, all the components are prefabricated at the factory; then all the parts are transported to a construction site, and the static pressure expansion pile 10 is assembled and welded on the ground of the site; then, the static pressure expansion pile 10 is directly fixed, and the impact collapsible loess of the pile head 600 enables the whole static pressure expansion pile 10 to move downwards; then, when the expansion bolt 410 reaches the designed depth, the tubular pile 100 is fixed, the external steel pipe 700 is adopted to apply pressure to the second plate body 440, and the second plate body 440 drives the expansion body 300 to move, so that the purpose of expanding the expansion body 300 is achieved; then, when the expansion body 300 is expanded to a design angle, the pressurization is stopped, and the concrete is filled in the inner gap; and finally, after the concrete is cured for a period of time, taking out the external steel pipe 700, continuously filling the concrete into the pipe pile 100, and curing to reach the specification.

After the expansion body 300 is opened to a design angle, concrete is filled, and the bearing capacity of the foundation structure is improved through the expansion head principle. The static pressure expansion pile 10 can further provide uplift bearing capacity and compression bearing capacity transmitted by a high-rise structure on the upper portion of the static pressure expansion pile 10 on the basis of solving the loess collapsibility geological disaster, in the aspect of bearing characteristics, the end bearing area can be increased by opening the expansion body 300, and the collapsibility of the bottom of the axis of the foundation can be solved by filling concrete, so that the integrity of the foundation is enhanced, and the uplift and compression bearing capacity of the foundation is improved.

In order to facilitate the fixed connection between the connection disc 200 and the tubular pile 100, as shown in fig. 3 and fig. 6, in a preferred embodiment, the connection disc 200 is a second flange, the tubular pile 100 includes a tubular body 110 and a third flange 120, the third flange 120 is fixedly disposed at one side of the tubular body 110, and the third flange 120 and the second flange are fixed into a whole through a connection pin 130; in a specific arrangement, the pipe body 110 is a concrete structure having a plurality of steel bars 111, the steel bars 111 are distributed along a circumferential direction of the pipe body 110, and the third flange 120 is provided with a groove 121 engaged with the connecting pin 130.

In the static pressure expansion pile 10, the third flange 120 is provided at one side of the pipe body 110, and the third flange 120 and the second flange are fixed into a whole by the connecting pin 130, so that the fixed connection between the pipe pile 100 and the connecting plate 200 is conveniently realized, and the structure is simple. In a specific arrangement, the connecting pin 130 may be fixed on the third flange 120, for example, the connecting pin 130 may be welded in a through hole of the third flange 120, and an axis of the connecting pin 130 is parallel to an axis of the third flange 120, and one end of the connecting pin 130 extends out of the third flange 120; of course, the fixing method of the connecting pin 130 and the third flange 120 is not limited to this, and other satisfactory connecting methods may be used.

In order to facilitate the fixed connection between the expansion body 300 and the connection disc 200, as shown in fig. 9, specifically, the expansion body 300 and the connection disc 200 are connected by a connection structure 800, and the connection structure 800 includes a second rotation shaft 810 and a third plate 820, wherein:

the second flange plate is evenly provided with a plurality of sixth through holes along the circumferential direction, and the number of the sixth through holes is opposite to that of the expansion bodies 300.

One end of the third plate body 820 is disposed in the sixth through hole, and the end of the third plate body 820 is welded to the inner wall of the sixth through hole; the other end of the third plate 820 extends out of the sixth through hole, and a seventh through hole is opened at the end of the third plate 820, and the axis of the seventh through hole is parallel to the first axis.

An eighth through hole is formed at an end of the expansion body 300, and the end of the expansion body 300 is connected with the third plate 820 into a whole through a second rotating shaft 810 penetrating through the seventh through hole and the eighth through hole; in a specific arrangement, both ends of the second shaft 810 are fixed by pins.

In above-mentioned static pressure inflation stake 10, one end through with third plate body 820 sets up in the sixth through-hole, and third plate body 820 and sixth through-hole welding, in order to realize the fixed connection of third plate body 820 and second ring flange, run through seventh through-hole, eighth through-hole through second pivot 810, in order to realize the rotation between third plate body 820 and the inflation body 300 comparatively simply conveniently and be connected, above-mentioned connection structure 800's simple structure, the preparation material is common, easily prefabricate in the mill, and the production cost is further reduced. Of course, there may be no welding effect between the third plate body 820 and the sixth through hole, and the third plate body 820 is directly disposed in the sixth through hole, and the third plate body 820 is fixedly connected to the sixth through hole by pouring concrete in the sixth through hole.

In order to facilitate the fixed connection between the connecting rod 500 and the second flange and the pile head 600, as shown in fig. 9 and 10, more specifically, a plurality of ninth through holes are uniformly arranged on the second flange along the circumferential direction thereof, the ninth through holes and the sixth through holes are located on the circumference of the same radius, the ninth through holes are located between two adjacent sixth through holes, one end of the connecting rod 500 is arranged in the ninth through hole, the end of the connecting rod 500 is welded to the inner wall of the ninth through hole, and the other end of the connecting rod 500 is welded to the pile head 600.

In the static pressure expansion pile 10, one end of the connecting rod 500 is welded to the ninth through hole, and the other end of the connecting rod 500 is welded to the pile head 600, so that the connecting rod 500, the second flange and the pile head 600 can be fixedly connected in a simple and convenient manner. By limiting the distribution of the ninth through holes and the sixth through holes, the distribution between the connecting rod 500 and the expansion body 300 is limited, and thus the uniform stress of the static pressure expansion pile 10 can be conveniently realized.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. The utility model provides a static pressure inflation stake, its characterized in that, includes tubular pile, annular connection pad, a plurality of inflation body, transmission structure, a plurality of connecting rod and pile head, wherein:

the transmission structure is arranged in the tubular pile, is connected with the expansion body and is used for driving the expansion body to deflect towards the direction away from the axis of the tubular pile when the tubular pile is pressed.

2. The static pressure expansion pile of claim 1, wherein the transmission structure comprises an expansion bolt and a plurality of connecting plates, wherein:

3. The static pressure expansion pile according to claim 2, wherein the expansion bolt comprises a connecting seat and a plurality of first plate bodies, the first plate bodies are embedded in the connecting seat and provided with extending ends extending out of the connecting seat, and the extending ends and the connecting plate are rotatably connected into a whole through a first rotating shaft.

4. A static pressure expansion pile according to claim 3, characterised in that the connecting socket comprises two first flanges and a first concrete, the first plate body comprises two first steel plates, wherein:

the two first steel plates are arranged in the first through holes at intervals, one end of each first steel plate is welded with the inner wall of each first through hole, a second through hole is formed in the other end of each first steel plate, and the end parts of the two first steel plates, which are provided with the second through holes, form the extending ends;

and a first pin shaft for forming the first rotating shaft penetrates through the second through hole and the third through hole and integrally connects the first steel plate and the connecting plate.

5. The static pressure expansion pile according to claim 4, characterized in that a fourth through hole is arranged in the middle of the expansion body, the axis of the fourth through hole is parallel to the first axis, a fifth through hole is arranged at one end of the connecting plate away from the first steel plate, and the connecting plate is connected with the expansion body into a whole through a second pin shaft penetrating through the fourth through hole and the fifth through hole.

6. The pile of claim 1, wherein the transmission structure is a second plate fixed to the expansion body on a side thereof adjacent to the axis of the pile.

7. The static pressure pile of claim 6, wherein the second plate is integrally formed with the expansion body.

8. The pile of claim 6, wherein the side of the second plate adjacent to the pile is beveled, the bevel being progressively further away from the pile in a direction toward the axis of the pile.

9. The pile of any one of claims 1-8, wherein the connecting plate is a second flange, the pile comprises a tubular body and a third flange fixedly arranged on one side of the tubular body, and the third flange and the second flange are fixed into a whole through a connecting pin.

10. The static pressure pile according to claim 9, wherein the expansion body and the connecting plate are connected by a connecting structure, the connecting structure comprising a second rotating shaft and a third plate body, wherein:

an eighth through hole is formed in the end portion of the expansion body, and the expansion body is connected with the third plate body into a whole through a second rotating shaft penetrating through the seventh through hole and the eighth through hole.

11. The static pressure expansion pile according to claim 10, wherein a plurality of ninth through holes are uniformly formed in the second flange plate along the circumferential direction of the second flange plate, the ninth through holes and the sixth through holes are located on the circumference of the same radius, the ninth through holes are located between every two adjacent sixth through holes, one end of each connecting rod is arranged in each ninth through hole and welded to the inner wall of each ninth through hole, and the other end of each connecting rod is welded to the pile head.