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Prefabricated tubular pile with end screw thread with X-shaped variable section and construction method thereof

A prefabricated pipe pile and thread technology, applied in sheet pile wall, foundation structure engineering, construction, etc., can solve problems such as reducing bearing capacity and large settlement, and achieve the effect of increasing bearing capacity, simple construction and high construction efficiency.

Active Publication Date: 2013-08-21
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This frictional resistance constitutes a part of the load of the pressure-bearing pile, which reduces the bearing capacity of the pile and may also cause a large settlement

Method used

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  • Prefabricated tubular pile with end screw thread with X-shaped variable section and construction method thereof
  • Prefabricated tubular pile with end screw thread with X-shaped variable section and construction method thereof
  • Prefabricated tubular pile with end screw thread with X-shaped variable section and construction method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1: A kind of end threaded X-shaped deformed section prefabricated pipe pile provided by the present invention, its structure is as follows figure 1 As shown, it includes the first pipe section 5 and the second pipe section 6. The first pipe section 5 is provided with a pile point 1, a large section section 2, a small section section 3 and a top thread section from bottom to top. 4, such as figure 2 . The surface of large section section 2 and small section section 3 has threads, and the cross section is X-shaped, such as image 3 . The cross-section of the top threaded section 4 of the first pipe joint is circular.

[0031] The second pipe joint 6 is in the shape of an inverted truncated cone, such as Figure 4 , there is a through hole 9 in the center of the cone, and the lower part of the through hole is provided with an internal thread section 8. The surface of the cone is smooth, and a scale line 7 for observing the depth of the pile is set on the si...

Embodiment 2

[0032] Embodiment 2: Apply the construction method of a prefabricated pipe pile with an end threaded X-shaped cross-section provided in Embodiment 1 of the present invention, including the following construction steps:

[0033] (1) Level the site and put the pile driver 12 in place, such as Figure 5 shown;

[0034] (2) Lifting the first pipe section 5 of the prefabricated pipe pile with threaded X-deformed section at the end of the present invention: first fasten the steel wire rope and rigging used for hanging the pile, and then tie the rigging to the upper end of the first pipe section 5 Near the lifting ring, start the machine to lift the first pipe joint, so that the pile point 1 is vertically aligned with the center of the pile position. After the position is accurate, it is slowly lowered and inserted into the soil, and then the pile cap 10 or pile collar is fastened on the top of the first pipe joint. The rigging can be removed;

[0035] (3) Stabilized pipe pile: Aft...

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Abstract

The invention relates to a prefabricated tubular pile with an end screw thread with an X-shaped variable section and a construction method thereof. The prefabricated tubular pile comprises two tubular joints, wherein the first tubular joint is provided with a pile tip, a large section segment, a small section segment and a top screw thread segment, the surface of the large section segment and thesmall section segment is provided with screw threads, and the sections are both in an X shape. The second tubular joint is in an inverse cone frustum shape, a through hole is formed in the center of the cone frustum, the lower segment of the through hole is provided with an internal screw thread segment, ruler lines are marked on the surface of the cone frustum in a smooth manner, and the cross section of the cone frustum is in a circular ring shape. The top screw thread segment of the first tubular joint is screwed into the internal screw thread segment of the second tubular joint so that the two tubular joints are connected into a complete tubular pile. The prefabricated tubular pile with the end screw thread with the X-shaped variable section is simple in structure, relatively low in manufacture cost, large in specific surface area and high in pile side positive friction resistance, and the bearing capacity of a single pile is obviously enhanced. The invention also provides a construction method of the tubular pile. According to the construction method, the process is simple, the maneuverability is strong, the construction efficiency is high, and the utilization percent of material strength per unit is high. The prefabricated tubular pile and the construction method are suitable for large pile foundation construction in a soft soil area and have a wide application prospect and a significant economical benefit.

Description

technical field [0001] The invention relates to a prefabricated pipe pile with threaded X-shaped cross-section at the end and a construction method thereof, belonging to the technical field of building pile foundations. Background technique [0002] The pile foundation bears the load of the superstructure mainly through the frictional resistance of the pile side and the resistance of the pile end. When the settlement of the soil around the pile is greater than the settlement of the pile body due to self-consolidation, water subsidence, site filling, ground surcharge, pile top load, and groundwater level drop, negative frictional resistance will occur on the pile side. This frictional resistance constitutes a part of the load of the pressure-bearing pile, which reduces the bearing capacity of the pile and may cause greater settlement. [0003] The generation of negative friction resistance has the following adverse effects: reducing the bearing capacity of the pile foundatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D5/24E02D5/72
Inventor 李长冬代先尧雍睿王凯刘庆涛马俊伟夏浩王姣梁德明
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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