CN209353332U - A new type of glass fiber reinforced plastic uplift pile - Google Patents

Abstract

The utility model discloses a kind of novel glass fiber reinforced plastic uplift piles, pile body includes internal lightweight, it is high-strength, corrosion-resistant and high tensile strength fiberglass reinforced plastics tendons skeleton, pile body surface is equipped with screw thread, increase the frictional force between pile body and the soil body, the bottom of pile body is equipped with cone, in variable cross-section along being uniformly distributed four grooves stake week, in the high flank of groove wedging compression strength, tip width is identical with flank, to protect flank without damage during piling, high bond strength fiberglass reinforced plastics deformation muscle and the wedging function of stake bottom side wing horizontal direction realize the stability of pile body jointly.The advantages of utility model: extraction-resistant behavior is good, and overall performance is good, and the extraction-resistant behavior of pile body extraction-resistant behavior and pile body is combined, and is suitable for uplift pile and cutting slope of soil nail support engineering.

Description

A new type of glass fiber reinforced plastic uplift pile

technical field

The utility model relates to slope support projects such as uplift piles and soil nails, and belongs to the field of geotechnical engineering in civil engineering.

Background technique

With the rapid development of civil engineering, the above-ground space is limited, and the available land resources are limited. Therefore, the development of urban architecture gradually turns to the development of underground space and the construction of high-rise buildings. With the increasing utilization of underground space, the depth of the foundation becomes deeper, and the foundation is more seriously eroded by groundwater and inorganic salt ions in the soil. Therefore, uplift piles are widely used in large-scale basement anti-floating, high-rise building anti-uplift, offshore dock platform uplift, suspension bridge and cable-stayed bridge anchor pile foundation, large dock floor pile foundation and anchor pile foundation in static load test piles Wait. In areas with high groundwater levels, when the load of the superstructure cannot balance the groundwater buoyancy, the whole or part of the structure will be subject to upward buoyancy. For example, underground pools, basement structures of buildings, and biochemical pools of sewage treatment plants must be equipped with uplift piles.

Utility model content

The purpose of the utility model is to develop a new type of GFRP anti-uplift pile, which makes full use of the characteristics of GFRP bars such as good corrosion resistance and high tensile strength, applies new materials in the anti-uplift pile, and overcomes the deficiencies of the prior art. , designed to improve the stability of the building structure.

The technical solution of the present utility model:

A new type of GFRP uplift pile, the pile body includes a GFRP reinforced skeleton with internal light weight, high strength, corrosion resistance and high tensile strength. The surface of the pile body is provided with threads to increase the friction between the pile body and the soil body. The bottom of the body is equipped with a conical tip with expanded bottom, and four grooves are evenly distributed along the circumference of the pile in the variable section, and the side wings with high compressive strength are wedged at the grooves. The flanks are not damaged, and the flanks at the bottom of the pile are horizontally inserted into the pile body to ensure the stability of the pile body.

The advantages of the utility model:

High-bond strength GFRP anti-uplift pile with high corrosion resistance and high tensile strength, when used, the anti-uplift pile is driven into the foundation soil, and the bottom intervertebral space is fully protected from damage to the anti-uplift flank, and the anti-uplift flank is also applied at the same time. When subjected to the uplift load, the flanks are subjected to earth pressure, embedded in the soil, and the thread of the pile body effectively increases the uplift resistance of the pile body. The joint force of the bottom and the pile body enhances the stability of the pile body; makes up for the deficiencies of the prior art, thereby increasing the stability of the building structure.

Description of drawings

Fig. 1 is the reinforcement and structural schematic diagram of the pile body of the present utility model

Figure 2 Schematic diagram of the force when the uplift pile is subjected to the uplift force

Fig.3 Working principle diagram of uplift pile under ultimate bearing capacity

Reference signs: 1. Pile body; 2. Flank; 3. Pile end; 4. Longitudinal bar; 5. Horizontal bar;

Detailed ways

In order to fully illustrate the purpose, technical solutions and advantages of the present invention, the technical solutions of the present invention will be further described in conjunction with specific embodiments.

A new type of GFRP uplift pile, see Figure 1 and Figure 2, the uplift pile is composed of three parts: pile body (1), flank (2), pile end (3), the pile body includes internal light weight, high strength , GFRP reinforcement skeleton with high corrosion resistance and high tensile strength, including longitudinal reinforcement (4), transverse reinforcement (5) and diagonal reinforcement (7), the surface of the pile body is provided with threads to increase the friction between the pile body and the soil body , the bottom of the pile body is installed with an expanded bottom cone tip, four grooves are evenly distributed along the circumference of the pile in the variable section, and the flanks with high compressive strength are wedged in the grooves, and the steel bars in the flanks are bent at the bending starting point (6). The width of the end head is the same as that of the flanks, so as to protect the flanks from damage during the piling process, and the flanks at the bottom of the pile are horizontally wedged into the pile body to ensure the stability of the pile body.

The use method of the present utility model is as follows:

Referring to Figure 1, in the process of piling, the vertebrae with the expanded bottom bear most of the earth pressure to protect the pile body and the flanks. Ultimate compressive bearing capacity of the flanks.

Referring to Figure 2, when the pile top is subjected to the pulling force, the threaded pile body and the flanks provide the main pull-out force, the flanks rotate in the direction away from the pile body, and the preloaded pile flanks provide the main bearing capacity, enhancing Pile stability, strengthen foundation strength.

Referring to Fig. 3, when the flanks of the pile body are subjected to the ultimate compressive strength, the intervertebral vertebrae at the pile bottom cooperate to bear the earth pressure, making full use of the compressive bearing capacity of the pile body and the pile bottom.

Claims (1)

1. a novel glass fiber reinforced plastic uplift pile is characterized in that: the inside of the pile body comprises the glass fiber reinforced plastic stirrups with a diameter of 8mm and the glass fiber reinforced plastic main bars of 10mm, flanks and the glass fiber reinforced plastic bars of the pile end. The expanded bottom section is bent at the starting point of the bend, and glass fiber reinforced plastic stirrups are encrypted at the pile end near the tip of the pile. The surface of the body is provided with threads to increase the friction between the pile body and the soil body. The bottom of the pile body is equipped with a cone tip, and four grooves are evenly distributed along the circumference of the pile in the variable section, and the wedging at the groove has high compressive strength. The width of the end is the same as that of the flank, so as to protect the flank from damage during the piling process. The high bonding strength of the glass fiber reinforced plastic deformation bar and the horizontal fit of the flank at the bottom of the pile jointly realize the stability of the pile body.