Multi-directional prestressed pile foundation structure

Abstract

The utility model relates to the technical field of prestressed piles, in particular to a multidirectional prestressed pile foundation structure which comprises a prestressed pile body, a cavity is formed in the prestressed pile body, four inserting grooves are formed in the inner side of the prestressed pile body, and inserting plates are installed and inserted into the four inserting grooves. The inserting plate is fixedly connected to the upper portion of the outer side of the supporting steel frame, the supporting steel frame is of a cross-shaped structure, reinforcing ribs are arranged at the junctions of all plate faces of the supporting steel frame, the reinforcing ribs are of an L-shaped structure, and the number of the reinforcing ribs is multiple. The cross-shaped supporting steel frame is rigidly connected with the inserting plates through the inserting grooves, boundary stress is dispersed in cooperation with the L-shaped reinforcing ribs, the lateral load resisting performance is further optimized, and the structure is suitable for the high-bearing-capacity requirement scene under the complex geological condition.

Description

TECHNICAL FIELD

[0001] The utility model relates to prestressed pile technical field, concretely relates to a kind of multidirectional prestressed pile foundation structure. BACKGROUND

[0002] Prestressed pile is a kind of prestressed pile structure, by pre-tensioning the pile body reinforcement, release tension after pouring concrete, so that pile concrete is in compression state, so as to offset the tensile stress generated by external load, delay crack, improve its crack resistance and bearing capacity using prestressed technology, widely used in construction engineering, bridge, wharf and other fields.

[0003] Most of the existing prestressed pile adopts hollow structure, not only convenient transportation and hoisting but also in the process of piling, hollow part allows soil into the pile, reduces end face resistance, needs smaller hammering energy in the process of driving, reduces equipment energy consumption, while reducing the disturbance to surrounding soil, but the effective shear area of the concrete of hollow structure is reduced, which may lead to insufficient shear resistance of the pile body when bearing transverse shear (such as earthquake, soil lateral pressure), therefore a multidirectional prestressed pile foundation structure is proposed. SUMMARY

[0004] In view of the problems in the prior art, the utility model provides a multidirectional prestressed pile foundation structure.

[0005] The utility model solves technical scheme that it adopts is a kind of multidirectional prestressed pile foundation structure, including prestressed pile body, the inside of prestressed pile body is hollow, the inside of prestressed pile body is equipped with the slot, the slot is equipped with four, four the slot is used for the installation of plug-in board and inserts, the plug-in board is fixedly connected on the outside upper portion of support steel frame, the support steel frame is cross-shaped structure arrangement, the junction of each panel of support steel frame is equipped with reinforcing rib, the reinforcing rib is L-shaped structure arrangement, the reinforcing rib is equipped with multiple.

[0006] Through the above technical scheme, the cross-shaped support steel frame is rigidly connected with the plug-in board through the slot, and the L-shaped reinforcing rib disperses the interface stress, further optimizes the lateral load resistance performance, and is suitable for high bearing capacity demand scene under complex geological conditions.

[0007] Specifically, the inside of the prestressed pile body is provided with a steel strand, the steel strand is provided with multiple, and the outside of the multiple steel strands is welded with high-strength steel wire.

[0008] Through the above technical scheme, the steel strand and the high-strength steel wire are welded to form a prestressed core network, and prestress is applied by tensioning the steel strand before pouring concrete to offset the tensile stress during service of the pile body. The high-strength steel wire further restrains the radial deformation of the steel strand to prevent concrete cracking.

[0009] Specifically, the high-strength steel wire is fixedly welded with threaded steel bars on its inner side, and the threaded steel bars are provided in multiple strands.

[0010] By adopting the above technical solution and introducing non-prestressed threaded steel bars into the prestressed steel reinforcement cage, the overall reinforcement ratio is increased to 1.5-2 times that of ordinary pipe piles. This design significantly improves the shear and bending resistance of the pile body.

[0011] Specifically, the outer side of the prestressed pile body is coated with a first protective layer.

[0012] By adopting the above technical solution, the outer surface of the pile is evenly sprayed before it is driven into the ground, which prevents the penetration of corrosive media (such as chloride ions and moisture) in the soil and extends the service life of the pile in a humid environment.

[0013] Specifically, the inner side of the prestressed pile body is coated with a second protective layer.

[0014] By adopting the above technical solution, the second protective layer covers the inner wall of the cavity and the slot area, preventing groundwater from intruding through the contact gap between the slot and the supporting steel frame, while reducing the corrosion of the internal steel structure by concrete carbonation.

[0015] The beneficial effects of this utility model are:

[0016] (1) The multi-directional prestressed pile foundation structure described in this utility model uses a cross-shaped support steel frame to rigidly connect the slot and the insert plate, and uses L-shaped reinforcing bars to disperse the boundary stress, further optimizing the resistance to lateral loads. It is suitable for high bearing capacity requirements under complex geological conditions.

[0017] (2) The multi-directional prestressed pile foundation structure described in this utility model adopts a double-layer epoxy resin protective layer design. The outer first protective layer blocks the penetration of soil corrosive media, and the inner second protective layer covers the cavity and slot area to prevent groundwater erosion and concrete carbonization. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Fig. 1 This is a three-dimensional structural diagram of the present invention;

[0020] Fig. 2 This is a top view of the structure of this utility model;

[0021] Fig. 3 This is a schematic diagram of the supporting steel frame structure of this utility model;

[0022] In the figure: 1, prestressed pile body; 2, plugboard; 3, support steel frame; 4, cavity; 5, threaded steel; 6, steel strand; 7, high-strength steel wire; 8, insertion slot; 9, first protective layer; 10, second protective layer; 11, reinforcing bar. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, purposes and effects of the utility model easy to understand, the utility model is further described below in combination with specific embodiments.

[0024] As an embodiment of the utility model, as shown in the figure, Figs. 1-3 A multi-directional prestressed pile foundation structure, comprising a prestressed pile body 1, a cavity 4 is formed in the prestressed pile body 1, an insertion slot 8 is formed in the inner side of the prestressed pile body 1, the insertion slot 8 is provided with four, the four insertion slots 8 are used for installing and inserting the plugboard 2, the plugboard 2 is fixedly connected to the outer side upper part of the support steel frame 3, the support steel frame 3 is provided in a cross-shaped structure, the junction between each panel of the support steel frame 3 is provided with a reinforcing bar 11, the reinforcing bar 11 is provided in an L-shaped structure, and the reinforcing bar 11 is provided with multiple.

[0025] In use, the cavity 4 provides space for the installation of the support steel frame 3, the plugboard 2 is inserted into the insertion slot 8 during construction, so that the cross-shaped support steel frame 3 is rigidly connected with the prestressed pile body 1. The L-shaped structure of the reinforcing bar 11 effectively disperses the stress concentration at the junction, improves the overall shear carrying capacity, and ensures that the pile body remains stable when bearing lateral loads.

[0026] It should be noted that the depth of the insertion slot 8 is consistent with the length of the plugboard 2.

[0027] The utility model also comprises that the prestressed pile body 1 is internally provided with steel strands 6, the steel strands 6 are provided with multiple, and the outer side of the multiple steel strands 6 is welded with high-strength steel wires 7.

[0028] In use, the welding combination of the steel strands 6 and the high-strength steel wires 7 forms a prestressed core network, and prestress is applied by tensioning the steel strands 6 before concrete pouring, which offsets the tensile stress of the pile body during service. The high-strength steel wires 7 further constrain the radial deformation of the steel strands 6, preventing concrete cracking.

[0029] The utility model also comprises that the inner side of the high-strength steel wire 7 is fixedly welded with a threaded steel 5, and the threaded steel 5 is provided with multiple.

[0030] In use, by introducing non-prestressed threaded steel 5 into the prestressed reinforcement framework, the comprehensive reinforcement ratio is improved to 1.5-2 times that of ordinary pipe piles. This design significantly improves the shear resistance and bending performance of the pile body.

[0031] It should be noted that the threaded steel 5 is HRB400 grade threaded steel.

[0032] The utility model still includes, the outside of prestressed pile body 1 has been sprayed with first protective layer 9.

[0033] In use, it is evenly sprayed on the outer surface before the pile body is driven into the ground, blocks the penetration of corrosion medium (such as chloride ion, moisture) in the soil, and prolongs the service life of the pile body in a humid environment.

[0034] The utility model still includes, the inside of prestressed pile body 1 has been sprayed with second protective layer 10.

[0035] In use, the second protective layer 10 covers the inner wall of the cavity 4 and the area of the slot 8, prevents groundwater from invading through the contact gap between the slot 8 and the supporting steel frame 3, and reduces the erosion of concrete carbonization on the internal steel structure.

[0036] It should be noted that the first protective layer 9 and the second protective layer 10 are both epoxy resin coatings, in order to avoid the first protective layer 9 and the second protective layer 10 being worn off by sand and gravel during the driving of the prestressed pile body 1, the coating thickness can be increased, or a pre-drilling method can be used to reduce the direct friction between the pile body and the rock-soil, or a temporary steel sheath or rubber protective layer can be installed on the outside of the prestressed pile body 1, and then removed after the driving is completed.

[0037] In use, the utility model first welds a plurality of threaded steels 5 on the inside of the high-strength steel wire 7 during the production of the prestressed pile body 1, then puts it into the mold to inject concrete to form, and then coats the first protective layer 9 and the second protective layer 10 on the outside and the inside of the prestressed pile body 1 respectively after the production of the prestressed pile body 1 is completed, in order to strengthen the corrosion resistance and durability of the prestressed pile body 1, inserts the supporting steel frame 3 into the cavity 4 inside the prestressed pile body 1 before driving, and aligns and inserts each of the supporting steel frame 3 outside upper portion into each of the slots 8, so that the supporting steel frame 3 is positioned and installed in the prestressed pile body 1, in order to improve the shear resistance of the prestressed pile body.

[0038] The basic principle, main features and advantages of the utility model are shown and described above. Those skilled in the art should understand that the utility model is not limited by the above examples, and the above implementation and description in the specification are only to illustrate the principle of the utility model, and various changes and improvements can be made without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed. The scope of protection claimed by the utility model is defined by the appended claims and their equivalents.

Claims

1. A multi-directional prestressed pile foundation structure, comprising a prestressed pile body (1), characterized in that, The prestressed pile body (1) has a cavity (4) inside and a slot (8) is provided on the inner side of the prestressed pile body (1). There are four slots (8), which are used for inserting the insert plate (2). The insert plate (2) is fixedly connected to the upper outer side of the supporting steel frame (3). The supporting steel frame (3) is arranged in a cross shape. Reinforcing ribs (11) are provided at the junctions between the various plates of the supporting steel frame (3). The reinforcing ribs (11) are arranged in an L shape and there are multiple reinforcing ribs (11).

2. The multi-directional prestressed pile foundation structure according to claim 1, characterized in that, The prestressed pile body (1) is provided with steel strands (6) inside, and there are multiple steel strands (6). High-strength steel wires (7) are welded to the outside of the multiple steel strands (6).

3. A multi-directional prestressed pile foundation structure according to claim 2, characterized in that, The high-strength steel wire (7) has a threaded steel bar (5) fixedly welded to its inner side, and the threaded steel bar (5) has multiple strands.

4. A multi-directional prestressed pile foundation structure according to claim 1, characterized in that, The outer side of the prestressed pile body (1) is coated with a first protective layer (9).

5. A multi-directional prestressed pile foundation structure according to claim 1, characterized in that, The inner side of the prestressed pile body (1) is coated with a second protective layer (10).

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