阅读说明：本技术 一种用于复合桩基的桩土荷载调节器 (Pile soil load regulator for composite pile foundation ) 是由 刘建鹏 何庆丰 何庆杉 彭仕进 于 2019-11-20 设计创作，主要内容包括：本发明公开了一种用于复合桩基的桩土荷载调节器,其包括上端板、下端板、上护筒、下护筒以及折角板件；所述折角板件的两端分别连接至上端板的底部以及下端板的顶部；所述上护筒安装在上端板的下端面上；所述下护筒安装在下端板的上端面上；使用时,将本发明的荷载调节器安装在承台与端承桩的桩顶之间,该荷载调节器通过设有折角板件,折角板件已有一定变形角度,折角板件的受压变形方向可控,所以荷载调节器的受压变形曲线稳定、准确,再通过该荷载调节器既定的受压变形曲线对复合桩基进行设计计算时,通过有效控制桩顶的竖向荷载,设计思路清晰、受力明确,能够有效调节桩土分担比例,就能提高其计算的准确度。(The invention discloses a pile soil load regulator for a composite pile foundation, which comprises an upper end plate, a lower end plate, an upper pile casing, a lower pile casing and a bevel plate, wherein the upper pile casing is arranged on the upper end plate; two ends of the bevel plate are respectively connected to the bottom of the upper end plate and the top of the lower end plate; the upper protective cylinder is arranged on the lower end surface of the upper end plate; the lower protective cylinder is arranged on the upper end surface of the lower end plate; when the load regulator is used, the load regulator is arranged between a bearing platform and the pile top of an end bearing pile, the load regulator is provided with the angle folding plate, the angle folding plate has a certain deformation angle, and the compression deformation direction of the angle folding plate is controllable, so that the compression deformation curve of the load regulator is stable and accurate, and when the composite pile foundation is designed and calculated through the established compression deformation curve of the load regulator, the vertical load of the pile top is effectively controlled, the design thought is clear, the stress is clear, the pile-soil sharing proportion can be effectively regulated, and the calculation accuracy can be improved.)

1. The utility model provides a stake soil load regulator for compound pile foundation which characterized in that: the device comprises an upper end plate, a lower end plate, an upper protective cylinder, a lower protective cylinder and at least one group of bevel plate pieces; two ends of the bevel plate are respectively connected to the bottom of the upper end plate and the top of the lower end plate; the upper protective cylinder is arranged on the lower end surface of the upper end plate; the lower protective cylinder is arranged on the upper end surface of the lower end plate.

2. A pile load adjuster for a composite pile foundation according to claim 1, wherein: the load regulator is provided with a plurality of groups of bevel plate members, wherein two ends of one group of bevel plate members are respectively connected to the centers of the upper end plate and the lower end plate, and the rest groups of bevel plate members are arranged around the group of bevel plate members and are distributed on the circumference at equal intervals.

3. A pile load adjuster for a composite pile foundation according to claim 1, wherein: and stiffening plates are respectively arranged at the included angles between the folded angle plate and the upper end plate and between the folded angle plate and the lower end plate.

4. A pile load adjuster for a composite pile foundation according to claim 1, wherein: the size of the upper protective cylinder and the size of the lower protective cylinder are scaled proportionally, and the upper protective cylinder is sleeved on the lower protective cylinder.

5. A pile load adjuster for a composite pile foundation according to claim 1, wherein: the cross sections of the upper protective cylinder and the lower protective cylinder are rectangular.

6. A pile load adjuster for a composite pile foundation according to claim 1, wherein: and the upper end plate and the lower end plate are both provided with anchor bolt holes.

Technical Field

The invention relates to the technical field of composite pile foundations of non-soft soil foundations, in particular to a pile-soil load regulator for a composite pile foundation.

Background

Pile foundations typically include conventional pile foundations as well as composite pile foundations; when the conventional pile foundation is designed and calculated, the bearing capacity of a single pile is a characteristic value or a design value, the bearing performance of soil around the pile is not considered, and the load of an upper structure is completely born by the pile; the composite pile foundation is a sparsely arranged pile foundation form, the bearing capacity of soil around the pile can be fully utilized, and compared with a conventional pile foundation, the quantity of the engineering piles is greatly reduced, and the cost investment can be greatly saved.

In the existing composite pile foundation, a load regulator is usually arranged between a bearing platform and the pile top of an end-bearing pile, when the upper load acting on the bearing platform is small, the load regulator and soil around the pile start to bear force at the same time, and because the rigidity of the load regulator is far greater than that of the soil around the pile, the bearing capacity of the soil around the pile can be ignored, and at the moment, the load regulator bears the upper load; when the upper load reaches the tonnage of the load regulator, the load regulator begins to deform under pressure along with the soil around the pile, at the moment, the rigidity of the load regulator is at a smaller level, the load regulator does not bear redundant load any more, and the increased load is borne by the soil around the pile through the coordinated deformation with the soil around the pile, so that the aim of the combined action of the pile and the soil is fulfilled; when the load regulator reaches the preset deformation, the rigidity of the load regulator is restored to the initial rigidity through the limiting device on the load regulator, the load regulator is withdrawn from the work, the load regulator becomes a part of the end-bearing pile through secondary grouting, the vertical rigidity of the end-bearing pile is extremely high and far greater than the rigidity of soil around the pile, the bearing capacity of the soil around the pile can be ignored, namely the soil around the pile does not play a role any more and is withdrawn from the work, and the subsequently increased upper load is borne by the end-bearing pile. The load regulator achieves the double regulation effect through coordinated deformation and secondary grouting.

Therefore, when the existing composite pile foundation is designed and calculated, the preset compression deformation curve of the load regulator is mainly used as the basis, so that the deformation calculation of the soil body is replaced as the basis, the calculation error caused by the complexity and uncertainty of the soil body is avoided, the bearing proportion of the soil around the pile and the end-bearing pile under the action of the upper load is accurately designed, and the bearing capacity of the composite pile foundation is accurately calculated.

However, it is observed that the compressive deformation of the existing load regulator is a torsional bending knee deformation which is still an uncertain deformation, and the compressive deformation curve of the load regulator has uncertainty, so that the composite pile foundation still has a large error in design calculation.

In view of the above, the present inventors have made extensive studies and research on various defects and inconveniences caused by the perfection of the bearing capacity calculation in the composite pile foundation.

Disclosure of Invention

The invention aims to provide a pile-soil load regulator for a composite pile foundation, which is used for accurately calculating the bearing capacity of the composite pile foundation in a matching manner.

In order to achieve the above purpose, the solution of the invention is:

a pile soil load regulator for a composite pile foundation comprises an upper end plate, a lower end plate, an upper pile casing, a lower pile casing and a bevel plate; two ends of the bevel plate are respectively connected to the bottom of the upper end plate and the top of the lower end plate; the upper protective cylinder is arranged on the lower end surface of the upper end plate; the lower protective cylinder is arranged on the upper end surface of the lower end plate.

The load regulator is provided with a plurality of groups of bevel plate members, wherein two ends of one group of bevel plate members are respectively connected to the centers of the upper end plate and the lower end plate, and the rest groups of bevel plate members are arranged around the group of bevel plate members and are distributed on the circumference at equal intervals.

And stiffening plates are respectively arranged at the included angles between the folded angle plate and the upper end plate and between the folded angle plate and the lower end plate.

The size of the upper protective cylinder and the size of the lower protective cylinder are scaled proportionally, and the upper protective cylinder is sleeved on the lower protective cylinder.

The cross sections of the upper protective cylinder and the lower protective cylinder are rectangular.

And the upper end plate and the lower end plate are both provided with anchor bolt holes.

After the scheme is adopted, when the load regulator is used, the load regulator is arranged between the bearing platform and the pile top of the end bearing pile, the angle folding plate is arranged, the angle folding plate has a certain deformation angle, and the compressive deformation direction of the angle folding plate is controllable, so that the compressive deformation curve of the load regulator is stable and accurate, and the calculation accuracy can be improved when the composite pile foundation is designed and calculated through the predetermined compressive deformation curve of the load regulator.

Drawings

FIG. 1 is a schematic structural diagram of a first embodiment of the present invention;

FIG. 2 is a cross-sectional view of section A-A of FIG. 1;

FIG. 3 is a state diagram illustrating the use of the first embodiment of the present invention;

fig. 4 is a cross-sectional view of a second embodiment of the present invention.

Detailed Description

In order to further explain the technical solution of the present invention, the present invention is explained in detail by the following specific examples.

As shown in fig. 1 to 3, there is a first embodiment of a pile load adjuster for a composite pile foundation according to the present invention, which includes an upper end plate 11, a lower end plate 12, an upper casing 13, a lower casing 14, and at least one set of dog-ear plate members 15; the two ends of the angle plate 15 are respectively connected to the bottom of the upper end plate 11 and the top of the lower end plate 12; the upper protecting cylinder 13 is arranged on the lower end surface of the upper end plate 11; the lower casing 14 is mounted on the upper end surface of the lower end plate 12.

When the load regulator 1 is used, the load regulator 1 is arranged between the bearing platform 2 and the pile top of the end bearing pile 3, the load regulator 1 is provided with the angle folding plate 15, the angle folding plate 15 has a certain deformation angle, and the compression deformation direction of the angle folding plate 15 is controllable, so that the compression deformation curve of the load regulator 1 is stable and accurate, and the calculation accuracy can be improved when the composite pile foundation is designed and calculated through the preset compression deformation curve of the load regulator 1.

And stiffening plates 16 are respectively arranged at the included angles between the angle folding plate 15 and the upper end plate 11 and the lower end plate 12. The strength and the stability of the structure of the load regulator 1 are enhanced by arranging the stiffening plate 16.

The sizes of the upper protective cylinder 13 and the lower protective cylinder 14 are scaled proportionally, and the upper protective cylinder 13 is sleeved on the lower protective cylinder 14. After the load regulator 1 is compressed and deformed, the upper casing 13 is pressed against the lower end plate 12 and is close to the lower casing 14, and the lower casing 14 abuts against the upper end plate 11 and is close to the upper casing 13, so that the strength and stability of the upper casing 13 and the lower casing 14 for supporting the upper end plate 11 are enhanced. And, the cross-sections of the upper casing 13 and the lower casing 14 are both rectangular. By providing the upper casing 13 and the lower casing 14 each with a rectangular cross section, the mounting of the gusset 15 is facilitated.

The upper end plate 11 and the lower end plate 12 are provided with anchor bolt holes 17. By providing the anchor bolt holes 17, it is possible to fixedly connect the upper end plate 11 of the load adjuster 1 to the bottom of the bearing platform 2 and the lower end plate 12 of the load adjuster 1 to the top of the end-bearing pile 3.

As shown in fig. 4, a second embodiment of a pile load adjuster for a composite pile foundation according to the present invention is different from the first embodiment in that: in the present embodiment, the load adjuster 1 is provided with seven sets of the corner panel members 15, wherein both ends of one set of the corner panel members 15 are connected to the centers of the upper end plate 11 and the lower end plate 12, respectively, and the remaining sets of the corner panel members 15 are arranged around the set of the corner panel members 15 and are equally spaced on the circumference. The number of the angle plates 15 is determined according to the tonnage of the load regulator 1, which can be eight groups, nine groups, etc. And, the angle plates 15 are arranged by surrounding and distributed equidistantly on the circumference, so that the compression deformation curve of the load regulator 1 is stable and accurate.

The foregoing description of specific exemplary embodiments of the invention has been presented for the purposes of illustration and description and is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as may be appropriate to those skilled in the art without departing from the scope of the invention.