An adjustable bearing pile for controlling pile foundation settlement

Abstract

The invention discloses an adjustable bearing pile for controlling the settlement of a pile foundation, which belongs to the technical field of building pile foundations, and comprises a pile basic body, a pile sleeve slidably mounted on the upper end of the pile basic body, and a settlement support member mounted between the pile basic body and the pile sleeve, wherein the pile sleeve is mounted in a raft, and the settlement support member comprises a plurality of positive elastic expansion members and a reverse elastic expansion member uniformly distributed along the circumference with the center of the pile basic body as the center of a circle, wherein the positive elastic expansion member and the reverse elastic expansion member have the same structure but are vertically inverted, and a support member is mounted between the positive elastic expansion member and the reverse elastic expansion member, wherein the positive elastic expansion member and the reverse elastic expansion member are respectively mounted on the pile sleeve and the pile basic body; the positive elastic expansion member comprises a plurality of spring steel plates sequentially stacked along the normal direction, and a steel sleeve for sleeve-connecting the spring steel plates. The bearing pile of the invention can maintain the stability of the pile foundation in the subsequent support process.

Description

Technical Field

[0001] The invention belongs to the technical field of building pile foundations, and in particular relates to an adjustable bearing pile for controlling pile foundation settlement. Background Art

[0002] The settlement difference control of pile foundation is of great significance to the quality control of basement in high-rise buildings. Due to the large difference in upper load between the main building and the podium in high-rise buildings, if no measures are taken, there will be a large uneven settlement difference between the pile foundations of the main building and the podium, which will cause cracks in the basement floor and cause a series of problems such as water leakage in the floor. Although there are some settlement adjustment measures in the prior art, the above not only affects the subsequent construction of the upper structure, but also has an adverse effect on the waterproof quality of the floor. The patent with the authorization announcement number CN100371532C discloses an adjustable bearing pile for pile foundation settlement. The settlement adaptive regulator of the pile foundation includes a cylinder, a top plate and a telescopic element. The telescopic element is superimposed with a rubber pad and a steel plate to achieve adaptive adjustment of the settlement. However, the rubber will age and fail after long-term use. At this time, the supporting effect of the pile foundation is affected, which is easy to cause the pile foundation to settle again. Summary of the invention

[0003] In view of this, an object of the present invention is to provide an adjustable bearing pile for controlling the settlement of a pile foundation, which can solve the technical problems in the background technology.

[0004] In order to achieve the above object, the present invention provides the following technical solutions:

[0005] The present invention discloses an adjustable bearing pile for controlling the settlement of a pile foundation, comprising a pile basic body, a pile sleeve slidably mounted on the upper end of the pile basic body, and a settlement support member mounted between the pile basic body and the pile sleeve, wherein the pile sleeve is mounted in a raft, and the settlement support member comprises a plurality of positive elastic telescopic members and a reverse elastic telescopic member uniformly distributed along the circumference with the center of the pile basic body as the center of a circle, wherein the positive elastic telescopic member and the reverse elastic telescopic member have the same structure but are vertically inverted, a support member is mounted between the positive elastic telescopic member and the reverse elastic telescopic member, and the positive elastic telescopic member and the reverse elastic telescopic member are provided with a support member, wherein ... The telescopic parts are respectively installed on the pile sleeve and the pile basic body; the forward elastic telescopic parts include a plurality of spring steel plates stacked in sequence along the normal direction and a steel sleeve for sleeve-connecting the spring steel plates, and the bending amplitude of the spring steel plates gradually increases from both ends and reaches a maximum value in the middle; the length of the spring steel plates gradually shortens as the number of stacked layers increases, and the outer ends of the spring steel plates are combined to form a step shape; the forward elastic telescopic parts and the reverse elastic telescopic parts are arranged in a staggered interval along the circumferential direction, so that the vertical projection of the spring steel plates of the forward elastic telescopic parts corresponds one to one with the spring steel plates of the reverse elastic telescopic parts.

[0006] Furthermore, a vertically extending guide rod is installed on the forward elastic telescopic member, and a guide hole corresponding to the guide rod is opened on the reverse elastic telescopic member and the pile basic body.

[0007] Furthermore, a support ring is provided on the upper surface of the pile basic body, the pile basic body is connected to the reverse elastic telescopic member through the support ring, the bottom of the support ring is connected to a support seat, and the upper end of the pile basic body is formed with an installation groove for installing the support seat and the support ring.

[0008] Furthermore, the support member adopts a support spring.

[0009] Furthermore, a rack is provided on the inner wall of the pile sleeve, a vertical groove is provided on the outer wall of the pile basic body, a pawl seat is installed in the vertical groove, a pawl and an elastic abutment are installed in the pawl seat, the pawl is supported by the elastic abutment, and the pawl cooperates with the rack.

[0010] Furthermore, a pouring pipe is installed at the upper opening of the vertical groove, and the pouring pipe is integrally installed in the raft slab, and the upper end of the pouring pipe extends out from the upper surface of the raft slab.

[0011] Furthermore, the steel cage in the pile body extends into the vertical groove at the same time.

[0012] Furthermore, a sliding groove for installing the rack is provided on the inner wall of the pile sleeve, the rack is slidably installed in the sliding groove, and the rack and the pile sleeve are locked by a locking member.

[0013] The beneficial effects of the present invention are:

[0014] The present invention discloses an adjustable load-bearing pile for controlling the settlement of pile foundation, which has three stages of settlement. The first stage is the deformation of the support member. As the force increases, the support member is deformed by the force, allowing the foundation soil to participate in the bearing, thereby eliminating the influence of the settlement difference of the building on the raft slab. As the building continues to rise, the second stage is the deformation of the spring steel plate. The spring steel plate becomes flat after bearing the load, which can further eliminate the settlement difference of the building and can be used to bear a larger load. The third stage is the rigid support. The spring steel plate is completely flattened, and the upper load is supported by its own structure, which can maintain the stability of the pile foundation in the subsequent support process.

[0015] In the device disclosed in the present invention, by using spring steel plates to replace rubber, the life and stability of the pile foundation support are greatly guaranteed, and the settlement of the device is controlled by setting the bending height of the spring steel plates and the elastic modulus of the support member. It can be ensured that the settlement difference of the pile foundation meets the requirements. The adjustment method is simple and cost can be saved.

[0016] In the device disclosed in the present invention, the spring steel plate can play a supporting function before being flattened, thereby meeting the settlement requirements of the pile foundation. After being flattened, it can achieve hard support. During hard support, since the vertical projection of the spring steel plate of the positive elastic telescopic member corresponds one-to-one with the spring steel plate of the reverse elastic telescopic member, the spring steel plate of the positive elastic telescopic member is just supported one-to-one by the spring steel plate of the reverse elastic telescopic member, which can avoid excessive extrusion and deformation of the spring steel plate due to the height difference, thereby allowing the settlement difference to be accurately controlled.

[0017] Other advantages, objectives and features of the present invention will be described in the following description and will be apparent to those skilled in the art to some extent, or those skilled in the art may be taught from the practice of the present invention. The objectives and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the present invention provides the following drawings for illustration:

[0019] Figure 1 It is a structural schematic diagram of the bearing pile of the present invention;

[0020] Figure 2 It is a schematic diagram of the installation position of the settlement support member of the present invention;

[0021] Figure 3 is a schematic diagram of the structure of the settlement support;

[0022] Figure 4 It is a schematic diagram of the cooperation between the forward elastic telescopic member and the reverse elastic telescopic member;

[0023] Figure 5 Schematic diagram of the coordination between the rack and the pawl;

[0024] The markings in the accompanying drawings are as follows: pile basic body 1, pile sleeve 2, settlement support member 3, raft slab 4, forward elastic telescopic member 5, reverse elastic telescopic member 6, support member 7, spring steel plate 8, steel sleeve 9, guide rod 10, guide hole 11, support ring 12, support seat 13, mounting groove 14, rack 15, vertical groove 16, pawl seat 17, pawl 18, elastic stopper 19, pouring pipe 20, steel cage 21, slide groove 22, locking member 23. DETAILED DESCRIPTION

[0025] like Figures 1 to 5As shown, the present invention discloses an adjustable bearing pile for controlling the settlement of a pile foundation, comprising a pile basic body 1, a pile sleeve 2 slidably mounted on the upper end of the pile basic body 1, and a settlement support 3 installed between the pile basic body 1 and the pile sleeve 2. The pile sleeve 2 is installed in a raft 4. The upper end of the pile sleeve 2 of the present invention is closed, and the lower end of the pile sleeve 2 is opened and slidably sleeved on the upper end of the pile basic body 1, and can be displaced axially relative to the impact body. The settlement support 3 can shrink when relative displacement occurs between the pile sleeve 2 and the pile basic body 1. The pile sleeve 2 is connected to the raft 4 and supported by the pile basic body 1.

[0026] Specifically, the settlement support member 3 disclosed in the present invention includes a plurality of positive elastic telescopic members 5 and a reverse elastic telescopic member 6 uniformly distributed along the circumference with the center of the pile basic body 1 as the center of the circle. The structures of the positive elastic telescopic member 5 and the reverse elastic telescopic member 6 are the same but are vertically inverted. Taking the positive elastic telescopic member 5 as an example, the positive elastic telescopic member 5 has a plurality of spring steel plates 8 stacked in sequence along the vertical direction, with the longest one being located at the uppermost side, and the longest spring steel plate 8 of the reverse elastic telescopic member 6 is located at the lowermost side.

[0027] A support member 7 is installed between the forward elastic telescopic member 5 and the reverse elastic telescopic member 6, and the forward elastic telescopic member 5 and the reverse elastic telescopic member 6 are respectively installed on the pile sleeve 2 and the pile basic body 1; the upper side of the forward elastic telescopic member 5 is installed on the inner top of the pile sleeve 2, and the lower side of the reverse elastic telescopic member 6 is installed on the upper surface of the pile basic body 1.

[0028] Among them, the positive elastic expansion member 5 includes a plurality of spring steel plates 8 stacked in sequence along the normal direction, and a steel sleeve 9 for sleeve-connecting each spring steel plate 8. The steel sleeve 9 is used to limit the plurality of spring steel plates 8. Each spring steel plate 8 can slide along the length direction to achieve deformation, but will not fall out of the steel sleeve 9 to avoid falling apart. The bending amplitude of the spring steel plate 8 gradually deepens from both ends and reaches the maximum value in the middle, achieving elastic support through its own deformation; the length of the spring steel plate 8 gradually shortens as the number of stacked layers increases. When the spring steel plate 8 is just stressed, the deformation is mainly achieved by the longest spring steel plate 8, which has the smallest stiffness at this time. As the deformation becomes larger and larger, more and more spring steel plates 8 are stressed, and the stiffness gradually increases, which can adapt to the settlement of pile foundations under different bearing capacities.

[0029] The outer ends of the spring steel plates 8 are combined to form a step shape; the positive elastic expansion joint 5 and the reverse elastic expansion joint 6 are arranged in a staggered interval along the circumferential direction, so that the vertical projection of the spring steel plates 8 of the positive elastic expansion joint 5 corresponds to the spring steel plates 8 of the reverse elastic expansion joint 6. When the two are in contact, the spring steel plates 8 of the positive elastic expansion joint 5 are just supported by the spring steel plates 8 of the reverse elastic expansion joint 6 in a one-to-one correspondence, which can avoid excessive extrusion deformation of the spring steel plates 8 due to the height difference, thereby allowing the settlement difference to be accurately controlled.

[0030] In this embodiment, a vertically extending guide rod 10 is installed on the forward elastic telescopic member 5, and a guide hole 11 corresponding to the guide rod 10 is opened on the reverse elastic telescopic member 6 and the pile basic body 1. By providing the guide rod 10, the forward elastic telescopic member 5 and the reverse elastic telescopic member 6 can be guided when deforming, avoiding the problem of unstable deformation caused by relative displacement of the two in the circumferential direction.

[0031] In this embodiment, a support ring 12 is provided on the upper surface of the pile basic body 1, and the pile basic body 1 is connected to the reverse elastic telescopic member 6 through the support ring 12. The bottom of the support ring 12 is connected to a support seat 13. The upper end of the pile basic body 1 is formed with a mounting groove 14 for mounting the support seat 13 and the support ring 12. The support ring 12 is made of steel material and is used to replace the pile basic body 1 to bear the force of the reverse elastic telescopic member 6, thereby reducing the damage caused by direct action on the pile basic body 1. Through the support seat 13, the contact force can be increased, thereby reducing the pressure.

[0032] In this embodiment, the support member 7 adopts a support spring. By replacing the support springs with different stiffnesses, the settlement difference can be easily adjusted, and the adjustment is more convenient.

[0033] In this embodiment, the inner wall of the pile sleeve 2 is provided with a rack 15, the rack 15 faces the inner side of the pile sleeve 2, the outer side wall of the pile basic body 1 is provided with a vertical groove 16, a pawl seat 17 is installed in the vertical groove 16, a pawl 18 and an elastic abutment 19 are installed in the pawl seat 17, the pawl 18 is supported by the elastic abutment 19, and the pawl 18 cooperates with the rack 15. The present invention can limit the unidirectional movement of the pile sleeve 2 by setting the cooperation of the rack 15 and the pawl 18, avoid the sliding of the raft 4 caused by the change of the upper end bearing capacity, and make the buckling deformation of the settlement support 3 more stable.

[0034] In this embodiment, a pouring pipe 20 is installed at the upper opening of the vertical groove 16, and the pouring pipe 20 is integrally installed in the raft 4, and the upper end of the pouring pipe 20 extends from the upper surface of the raft 4. By providing the pouring pipe 20, after the structure is settled, concrete can be poured into the vertical groove 16 through the pouring pipe 20, so that the ratchet 18 and the rack 15 in the vertical groove 16 are cast into a whole, and the two are fixed, so as to avoid the pile foundation from settling again in the future and ensure the stability of subsequent use.

[0035] In this embodiment, the steel cage 21 in the pile body 1 is extended into the vertical groove 16 at the same time, which can increase the structural strength of the cast-in-place concrete in the vertical groove 16 .

[0036] In this embodiment, the inner wall of the pile sleeve 2 is provided with a slide groove 22 for installing the rack 15. The rack 15 is slidably installed in the slide groove 22. The rack 15 and the pile sleeve 2 are locked by a locking member 23. By sliding the rack 15, the height position of the rack 15 can be adjusted. In the initial stage of installation, the rack 15 can be better matched with the pawl 18 to reduce the matching clearance.

[0037] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. An adjustable bearing pile for controlling the settlement of a pile foundation, comprising a pile body, a pile sleeve slidably mounted on the upper end of the pile body, and a settlement support installed between the pile body and the pile sleeve, wherein the pile sleeve is installed in a raft, and is characterized in that: The settlement support member comprises a plurality of positive elastic expansion members and a reverse elastic expansion member uniformly distributed along the circumferential direction with the center of the pile basic body as the center of the circle, the structures of the positive elastic expansion member and the reverse elastic expansion member are the same but are arranged vertically inverted, a support member is installed between the positive elastic expansion member and the reverse elastic expansion member, and the positive elastic expansion member and the reverse elastic expansion member are respectively installed on the pile sleeve and the pile basic body; the positive elastic expansion member comprises a plurality of spring steel plates stacked in sequence along the normal direction, and a steel sleeve for sleeve-connecting each spring steel plate, the bending amplitude of the spring steel plate gradually deepens from both ends and reaches a maximum value in the middle; the length of the spring steel plate gradually shortens as the number of stacked layers increases, and the outer ends of each spring steel plate are combined to form a step shape; the positive elastic expansion member and the reverse elastic expansion member are arranged in a staggered interval along the circumferential direction, so that the vertical projection of the spring steel plate of the positive elastic expansion member corresponds one by one to the spring steel plate of the reverse elastic expansion member.

2. The adjustable bearing pile for controlling pile foundation settlement according to claim 1, characterized in that: A vertically extending guide rod is installed on the forward elastic telescopic member, and a guide hole corresponding to the guide rod is opened on the reverse elastic telescopic member and the pile basic body.

3. The adjustable bearing pile for controlling pile foundation settlement according to claim 2, characterized in that: A support ring is arranged on the upper surface of the pile basic body, the pile basic body is connected to the reverse elastic telescopic member through the support ring, a support seat is connected to the bottom of the support ring, and an installation groove for installing the support seat and the support ring is formed at the upper end of the pile basic body.

4. The adjustable bearing pile for controlling pile foundation settlement according to claim 1, characterized in that: The support member adopts a support spring.

5. An adjustable bearing pile for controlling pile foundation settlement according to any one of claims 1 to 4, characterized in that: The inner wall of the pile sleeve is provided with a rack, the outer wall of the pile basic body is provided with a vertical groove, a pawl seat is installed in the vertical groove, a pawl and an elastic abutment are installed in the pawl seat, the pawl is supported by the elastic abutment, and the pawl cooperates with the rack.

6. The adjustable bearing pile for controlling pile foundation settlement according to claim 5, characterized in that: A pouring pipe is installed at the upper opening of the vertical groove. The pouring pipe is integrally installed in the raft slab, and the upper end of the pouring pipe extends out from the upper surface of the raft slab.

7. The adjustable bearing pile for controlling pile foundation settlement according to claim 6, characterized in that: The steel cage in the pile base body extends into the vertical groove at the same time.

8. The adjustable bearing pile for controlling pile foundation settlement according to claim 5, characterized in that: The inner wall of the pile sleeve is provided with a sliding groove for installing the rack, the rack is slidably installed in the sliding groove, and the rack and the pile sleeve are locked by a locking piece.

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