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Occlusive pile of long spiral stirring water-stop curtain and construction process thereof

A technology of stirring piles and long spirals, which is applied in the field of long spiral stirring water-stop curtain occlusal piles and the construction technology of piles, which can solve the problems of difficult civilized construction, low construction efficiency, failure to reach the designed depth and designed diameter, etc.

Inactive Publication Date: 2009-12-16
深圳市南华岩土工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the shortcomings that the existing cement-soil mixing piles cannot reach the designed depth and diameter when encountering sand layers and sandy pebble formations; and the construction efficiency is low, and it is difficult to realize civilized construction, the present invention provides a long spiral mixing water-stop curtain Pile and its construction technology, and the existing long auger drilling rig has been modified, which can overcome the hard soil layer drilling, and improve the reliability of the water-stop (water-proof or water-cut) curtain

Method used

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  • Occlusive pile of long spiral stirring water-stop curtain and construction process thereof
  • Occlusive pile of long spiral stirring water-stop curtain and construction process thereof
  • Occlusive pile of long spiral stirring water-stop curtain and construction process thereof

Examples

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Effect test

Embodiment 1

[0022] Example 1 - Mafang New Village Phase II Underground Garage Foundation Pit Support Project:

[0023] 1. Project overview and geological conditions

[0024] The proposed project is located on Mafang East Road, Chaoyang District, Beijing, and is used as an underground garage with a second basement floor and 1.5m of earth covering. This project is a reinforced concrete frame structure on the second floor underground, partly out of the ground. The foundation adopts beam-slab raft foundation.

[0025] The relative elevation of this project ±0.000 is equivalent to the absolute elevation of 38.600. The elevation of the bottom of the underground garage is -13.46m (the absolute elevation is 25.14m), and the depth of the foundation pit is 12.76m.

[0026] 1.1 Engineering geological conditions of the site

[0027] According to the depositional age and genetic type, the strata in the survey area are divided into two categories: artificial accumulation layer and Quaternary sedime...

Embodiment 2

[0097] Example 2 Foundation Pit Support Engineering of Tianli Production R&D Building Project

[0098] 1 Project overview

[0099] The proposed Tianli production and R&D building project is located at No. 101 Lize Zhongyuan, Wangjing, Chaoyang District, Beijing, and is now in the courtyard of Beijing Tianli Cryogenic Equipment Co., Ltd.

[0100] According to the information provided in the "Tianli Production and R&D Building Foundation Pit Support Construction Bidding Document", this project includes the main building and the pure underground part. The main building has 13 floors above the ground, and the frame-core tube structure has a total height of 59.9m; there are 2 underground floors. The south side of the main building is a purely underground part, with a basement floor, which is mainly used for parking vehicles (partially with equipment mezzanine), frame structure, and its overlying soil is 3.90m.

[0101] The ground elevation of the basement 2 floors of the main buil...

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Abstract

The invention relates to a novel pile-forming method of a cement-soil stirring pile. The method comprises the following steps: measuring and putting lines to determine pile position; putting a long spiral drill in place, and adopting the long spiral drill to drill a hole to determine the accurate position of a pile, loosen a hardpan and eliminate underground barrier; backfilling to the opening of the hole, or reversing and lifting the drill; drilling by a long spiral stirring pile drill while pumping and stirring serum to a designed hole bottom elevation; during returning upwards, guniting while stirring to the designed elevation, and then stirring repeatedly and guniting to form a pile; after finishing stirring pile construction, making use of the long spiral stirring pile drill to drill the stirring pile to form holes; and finally, inserting slope-protection piles used in steel reinforcement cage construction after concrete grouting to form an entire curtain. The novel pile-forming method has the advantages that a long spiral stirring pile is adopted to lay a foundation for the smooth construction of slope-protection piles; the renovated long spiral drill can drill in harder soil stratum, sand stratum and gravel stratum, thereby reaching the designed depth and diameter; and the integral curtain with occlusive slope-protection piles and cement-soil piles not only supports foundation pits, but also realizes effective water stopping.

Description

technical field [0001] The invention belongs to the pile-forming technology in building foundation construction, and in particular relates to a long spiral stirring water-stop curtain occlusal pile and a construction technology for pile-forming thereof. The long spiral stirring pile is engaged with the slope protection pile to form a water-stop (water-proof or water-cutting) curtain, and can also be used for the slope protection pile and its mother pile, the composite foundation pile and its mother pile, and the anti-floating (pulling) pile mother pile. Especially in the hard soil layer in the northern region, it has more advantages. Background technique [0002] Cement-soil mixing piles are a common method of curtain piles in soft soil areas, but construction in hard soil layers in northern areas is ineffective, especially in sand and sand and pebble layers, and cannot reach the design depth, so it is no longer applicable. Rotary grouting piles are also a common method of ...

Claims

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Application Information

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IPC IPC(8): E02D5/18E02D5/46E02D5/36E21B3/02E21B7/00E21B10/00
Inventor 何世鸣李江田震远周与诚张明中王之军贾城杨敏陈辉李长生司呈庆王建明程金霞黄鑫峰洪伟杜高恒
Owner 深圳市南华岩土工程有限公司
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