CN216809851U

CN216809851U - Pile head structure for uplift pile

Info

Publication number: CN216809851U
Application number: CN202220001840.XU
Authority: CN
Inventors: 王洪臣; 张涛; 褚玲; 韦孙印; 卢骥
Original assignee: China Northwest Architecture Design and Research Institute Co Ltd
Current assignee: China Northwest Architecture Design and Research Institute Co Ltd
Priority date: 2022-01-04
Filing date: 2022-01-04
Publication date: 2022-06-24
Anticipated expiration: 2032-01-04

Abstract

The application discloses pile head structure for uplift pile relates to construction technical field, has solved prior art uplift pile foundation when anti superficial water level is lower and has become the pressurized state, and then leads to stake soil combined action, causes the basis atress complicated, produces the problem of potential safety hazard easily. The pile head structure comprises an uplift pile head, a concrete cushion layer and a raft plate; the pile head of the uplift pile penetrates through the concrete cushion layer and extends into the raft; a waterproof layer is laid between the concrete cushion layer and the raft; the outer surface of the pile head penetrating through the concrete cushion layer is coated with waterproof paint, and the waterproof paint is in lap joint with the waterproof layer; and a water stop strip is arranged at the position where the pile foundation of the uplift pile is contacted with the concrete cushion. By adopting the pile head structure, the clear interaction between the pile and the foundation is realized, the stress is clear, and the structure is safe and reliable.

Description

Pile head structure for uplift pile

Technical Field

The application relates to the technical field of building construction, in particular to a pile head structure for an uplift pile.

Background

The uplift pile has two treatment methods in practical use: one is that the underground water level is higher, when needing to consider the water buoyancy, it is used as the anti-floating pile; when the water head is not high, the pile is used as a compression-resistant pile to bear the whole weight of a building, and the reinforcing bars and the bearing capacity of the pile are designed and constructed according to two working conditions of pulling resistance and compression resistance. The other type is that the pile is used as an uplift pile only when the water level is high to resist water buoyancy, and when the water level is low, although the pile foundation becomes compressed, for design convenience, a calculation model is simplified, the compression resistance effect is neglected, and the pile is completely designed according to a natural foundation. Therefore, the treatment of the pile head in both cases is designed and constructed in a compressed state.

To the first condition, the uplift pile gives consideration to the function of the uplift pile at the same time, the pile arrangement scheme takes consideration of two working conditions of pressing and pulling, the arrangement of the basement is complex, when the difference of internal force of the column bottom is large, the arrangement of the pile is difficult, especially when the building has a multi-layer basement, the natural foundation can meet the bearing capacity requirement under the normal water level, the uplift pile is not needed at all, and great waste can be caused according to the design of the uplift pile. In the second case, the compressive capacity of the pile is ignored in the low water level, and the pile head structure is implemented according to the compressive pile, so that the pile and the foundation soil have reaction force on the foundation in the actual stress, the stress of the foundation is complex, and great potential safety hazards are buried.

Disclosure of Invention

The embodiment of the application is through providing a pile head structure for uplift pile, has solved the uplift pile in prior art and has become the pressurized state at pile foundation when anti-floating water level is lower, and then leads to pile soil combined action, causes the basis atress complicated, produces the problem of potential safety hazard easily, has realized that the interact between stake and the basis is clear, and the atress is clear and definite, structure safe and reliable.

The embodiment of the utility model provides a pile head structure for an uplift pile, which comprises an uplift pile head, a concrete cushion and a raft;

the pile head of the uplift pile penetrates through the concrete cushion layer and extends into the raft;

a waterproof layer is laid between the concrete cushion layer and the raft;

the outer surface of the pile head penetrating through the concrete cushion layer is coated with waterproof paint, and the waterproof paint is in lap joint with the waterproof layer;

and a water stop strip is arranged at the position where the pile foundation of the uplift pile is contacted with the concrete cushion.

Furthermore, a water swelling water stop ring is arranged at the position where the inner side of the uplift pile head is connected with the steel bar.

Furthermore, a sealant is arranged between the top surface of the uplift pile head and the raft.

Furthermore, the sealant is silicone sealant.

Furthermore, the waterproof layer is composed of the waterproof mortar and a waterproof coiled material.

Furthermore, the waterproof coating adopts a cement-based permeable crystallization waterproof coating.

Furthermore, the water stop strip is a slow expansion type water stop strip capable of expanding when encountering water.

One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

according to the pile head structure for the uplift pile, the waterproof layer is laid between the concrete cushion layer and the raft plate to form the first waterproof layer, the waterproof coating is coated on the outer surface of the pile head penetrating through the concrete cushion layer, the waterproof coating is enabled to be in lap joint with the waterproof layer to form the waterproof layer of the exposed part of the pile head, finally, the water stop strip is arranged at the contact part of the pile foundation of the uplift pile and the concrete cushion layer to prevent underground water from permeating into the raft plate along the uplift pile to form another waterproof layer, and the waterproof reliability of the pile side, the pile head and the reinforcing steel bar is fully guaranteed by adopting a plurality of waterproof measures. By adopting the pile head structure, the problems that the pile foundation of the uplift pile is in a pressed state when the anti-floating water level is low in the prior art, the pile soil coacts to cause complex foundation stress and potential safety hazards are easy to generate are effectively solved, and the pile head structure realizes clear interaction between the pile and the foundation, clear stress and safe and reliable structure.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural view of a pile head of an uplift pile provided in an embodiment of the present application.

Reference numerals: 1. uplift piles; 2. a concrete cushion; 3. a raft plate; 4. a waterproof layer; 5. sealing glue; 6. waterproof paint; 7. a water stop ring expanding when encountering water; 8. a water stop bar; 9. and (5) reinforcing steel bars.

Detailed Description

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, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the embodiments of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have specific orientations, be configured in specific orientations, and operate, and thus, should not be construed as limiting the present invention. The terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. Specific meanings of the above terms in the embodiments of the present invention can be understood by those of ordinary skill in the art according to specific situations.

Referring to fig. 1, an embodiment of the present invention provides a pile head structure for a uplift pile, including a pile head of the uplift pile 1, a concrete cushion 2, and a raft 3; the pile head of the uplift pile 1 penetrates through the concrete cushion 2 and extends into the raft 3; a waterproof layer 4 is laid between the concrete cushion layer 2 and the raft 3; the outer surface of the pile head penetrating through the concrete cushion layer 2 is coated with waterproof paint 6, and the waterproof paint 6 is lapped with the waterproof layer 4; and a water stop strip 8 is arranged at the contact part of the pile foundation of the uplift pile 1 and the concrete cushion 2.

According to the pile head structure for the uplift pile, the waterproof layer 4 is laid between the concrete cushion layer 2 and the raft 3 to serve as first waterproof; coating waterproof paint 6 on the outer surface of the pile head penetrating through the concrete cushion layer 2, and ensuring that the waterproof paint 6 is in lap joint with the waterproof layer 4 to form a waterproof layer of the exposed part of the pile head to serve as a second waterproof layer; and finally, arranging a water stop strip 8 at the contact part of the pile foundation of the uplift pile 1 and the concrete cushion 2 to prevent underground water from permeating into the raft 3 along the uplift pile 1 and the concrete to form a waterproof layer serving as a third waterproof layer. By adopting a plurality of waterproof measures, the waterproof reliability of the pile side, the pile head and the reinforcing steel bar is fully ensured. By adopting the pile head structure, the problems that the pile foundation of the uplift pile is in a pressed state when the anti-floating water level is low in the prior art, the pile soil coacts to cause complex foundation stress and potential safety hazards are easy to generate are effectively solved, and the pile head structure realizes clear interaction between the pile and the foundation, clear stress and safe and reliable structure. And according to this structure, the interaction concept between stake and the basis is clear, and the atress is clear and definite, accords with actual conditions, saves the cost, and the economic nature is good.

As shown in fig. 1, a water-swelling water stop ring 7 is arranged at a position where the inner side of the pile head of the uplift pile 1 is connected with a steel bar 9.

Specifically, uplift pile 1 is when building, and its inside is provided with reinforcing bar 9 to reinforcing bar 9 can extend to the pile head from uplift pile 1's bottom, and stretches out the pile head, consequently, in order to prevent groundwater along reinforcing bar 9 infiltration raft 3, is provided with water-swelling seal ring 7 in the inboard position that is connected with reinforcing bar 9 at uplift pile 1 pile head top, in order to prevent groundwater infiltration raft 3.

Referring to fig. 1, a sealant 5 is arranged between the top surface of the pile head of the uplift pile 1 and the raft 3, and the sealant 5 is a silicone sealant.

In the middle of practical application, establish 50mm thick silicone sealant between pile head and foundation plate i raft 3, silicone sealant has fabulous formability, deformability, waterproof performance and quick setting performance, and then when making the building need anti-floating, the pile foundation play resistance to plucking effect, when the building need not anti-floating, because the compression deformation of silicone sealant, the pile foundation can not the pressurized, foundation plate directly passes power for the ground, makes basis and pile foundation not have the relation.

As a further improvement of this embodiment, the waterproof layer 4 is composed of waterproof mortar and waterproof roll.

In this embodiment, the waterproof layer 4 is made of waterproof mortar and waterproof roll, so that the waterproof effect can be improved.

In practical application, the waterproof coating 6 is a cement-based permeable crystalline waterproof coating.

In the embodiment, the cement-based permeable crystalline waterproof coating is coated on the pile head and is lapped with the waterproof coiled material, so that underground water cannot enter the foundation slab from the pile head concrete. In addition, it should be noted that when the cement-based permeable crystalline waterproof coating is coated, the coating must be continuous and uniform, and the water spraying maintenance is started after the second layer of coating is in a semi-dry state, and the maintenance time is not less than 3 days.

In practical application, the water stop strip 8 is a slow expansion type water stop strip expanding when encountering water.

In this embodiment, when the water stop strip 8 is provided, grooves of 20mm × 20mm and 10mm × 10mm are chiseled at the root of the pile head and the root of the pile head reinforcing steel bar 9, respectively, so as to fix the water stop strip 8. And the sealing rod 8 adopts the slowly-expanding water-swelling sealing rod, so that the water-swelling speed of the sealing rod 8 in water can be reduced, and the sealing performance between the uplift pile 1 and the concrete cushion layer 2 is ensured to be firmer.

The embodiments in the present specification are described in a progressive manner, and the same or similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments.

The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the present application; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the present disclosure.

Claims

1. A pile head structure for an uplift pile is characterized by comprising a pile head of the uplift pile (1), a concrete cushion layer (2) and a raft (3);

the pile head of the uplift pile (1) penetrates through the concrete cushion (2) and extends into the raft (3);

a waterproof layer (4) is laid between the concrete cushion layer (2) and the raft plates (3);

the outer surface of the pile head penetrating through the concrete cushion layer (2) is coated with waterproof paint (6), and the waterproof paint (6) is overlapped with the waterproof layer (4);

and a water stop strip (8) is arranged at the position where the pile foundation of the uplift pile (1) is contacted with the concrete cushion (2).

2. Pile head structure for uplift pile according to claim 1, characterized in that a water-swelling water stop ring (7) is arranged at the position where the inner side of the pile head of uplift pile (1) is connected with the steel bar (9).

3. The pile head structure for uplift piles according to claim 1, wherein a sealant (5) is provided between the top surface of the pile head of the uplift pile (1) and the raft (3).

4. Pile head construction for a uplift pile according to claim 3, wherein the sealant (5) is a silicone sealant.

5. Pile head structure for uplift piles according to claim 1, wherein the waterproof layer (4) consists of waterproof mortar and waterproof roll.

6. Pile head construction for a uplift pile according to claim 1, wherein the waterproof coating (6) is a cement-based infiltration crystalline waterproof coating.

7. Pile head structure for uplift piles according to claim 1, characterized in that the water stop-bar (8) is a slow swelling water-swelling water stop-bar.