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Double-casing-pipe full-circle-swinging erect column pile construction method

A column pile, full rotation technology, applied in sheet pile wall, infrastructure engineering, construction and other directions, can solve the problems of torsion of steel bar cage, drop of top elevation of steel column pile, shortening of length, etc., to reduce the torsion of steel bar, The effect of short pile forming time and strong cutting ability

Inactive Publication Date: 2016-01-27
ZHONGTIAN CONSTR GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the casing drives the concrete during the full-turn lifting process, causing the steel cage to be twisted, and at the same time, the steel cage is bent and deformed under the weight of the steel column, and the length becomes shorter, which finally causes the elevation of the steel column pile top to drop

Method used

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Examples

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Embodiment 1

[0022] The project overview of this example is: the total construction area of ​​the first inspection office project of the main stadium of an Olympic sports center is 216,000 square meters, with one basement and six floors above the ground. The center is a large-scale sports building ancillary building, and the main stadium stand and ancillary rooms are reinforced concrete frame shear wall structures. Because the project is close to the river, the original soil base is fine sand layer, and the bearing capacity of the foundation is insufficient.

[0023] Adopt the method construction of the present invention, design and use pile diameter to be the column pile of 1000mm equally, the length of pile is 7m, what column pile adopted is 360 ° of double casing full rotary drilling rig construction. The specific steps are as follows: first, the positioning of the pile driver, using the full-rotation casing method, first press the outer casing (about 9m in length), and take soil; secon...

Embodiment 2

[0025] The project overview of this example is: a reconstruction project with a total construction area of ​​72512.7㎡ and a building height of 172.1m consists of a 46-storey tower building, 5 storey commercial buildings above ground, 3 storey underground garages and equipment rooms. The excavation depth of the foundation pit is 15.00m, and the excavation depth of partial pits is 18.70m. Due to the obstacles such as concrete left in the foundation of the reconstruction project, it is relatively hard.

[0026] Adopt the method construction of the present invention, the pile diameter of the steel column pile as vertical load-bearing member is 1000mm, and the pile length is 13.9m, and what steel column pile adopts is 360 ° double casing full rotary drilling rig construction. Among them, the outer diameter of the φ1000 casing is 1000mm (the same as the diameter of the column pile), and the inner diameter is 880mm; the outer diameter of the φ1200 casing is 1200mm, and the inner diam...

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Abstract

The present invention discloses a double-casing-pipe full-circle-swinging erect column pile construction method. The method comprises the steps of positioning a pile machine, pressing an inner casing pipe dowards, forming holes in the inner casing pipe; cleaning up barriers, hanging and welding steel reinforcement cages, hanging latticed columns at the edge of an inner casing pipe tube, placing tremies, lifting out inner and outer casing pipes and backfilling with coarse sand. The construction method provided by the present invention is suitable for various complicated soil textures, is short in pile-forming time, and can solve the problem of lowering of top elevation of steel columns, the sinkage of the steel columns is controlled within an error allowable range, and the pile-forming quality is ensured.

Description

technical field [0001] The invention relates to a double-casing full-rotation method for constructing a column pile. Background technique [0002] With the rapid development of the domestic economy, there are more and more urban construction redevelopment projects, old city renovations, subway tunnels, underground enclosures and other projects in large and medium-sized cities, and obstacles such as underground rocks or residual old concrete structures are often encountered. For the construction of similar underground projects, due to the uneven stratum and hard geology, pile foundations are usually used to support the force. Today's pile foundation construction basically adopts the "universal construction technology" - the full-rotation casing method, which can effectively solve the above geological problems. However, the casing drives the concrete during the full-turn lifting process, which causes the steel cage to be twisted. At the same time, the steel cage is bent and d...

Claims

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Application Information

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IPC IPC(8): E02D5/38
Inventor 刘玉涛肖婷傅婧戴传新
Owner ZHONGTIAN CONSTR GROUP
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