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Foundation reinforcement method combining carbonatite boulder dynamic-compaction with filling and replacement

A technology for replacing foundations with carbonate rocks, applied in infrastructure engineering, soil protection, construction, etc., can solve problems such as lack of application, meet design and specification requirements, reduce engineering construction investment, and improve strength and uniformity Effect

Inactive Publication Date: 2016-11-09
ZHENGYE ENG & INVESTMENT INC
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For weak foundations in carbonate rock areas, it is less used

Method used

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  • Foundation reinforcement method combining carbonatite boulder dynamic-compaction with filling and replacement
  • Foundation reinforcement method combining carbonatite boulder dynamic-compaction with filling and replacement

Examples

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Embodiment Construction

[0017] A method for reinforcing the ground with dynamic tamping and replacement of large carbonate rocks (see figure 1 ), the specific implementation steps are as follows:

[0018] Step 1: Clean up and level the construction site, pre-lay a layer of compacted cushion layer 1 with a thickness of 500mm and a particle size of no more than 100mm, and use natural graded carbonate rock blocks with a clay content of no more than 5% for the cushion layer 1 filler.

[0019] Step 2: Mark the position of the ramming point 6, and measure the site and the elevation around the ramming point.

[0020] Step 3: Use 8000kN·m tamping energy to carry out dynamic tamping replacement. A circular rammer with a diameter of 2.5m and a weight of 45t is selected for use. Lift the rammer to a height of 18m first, then turn on the uncoupling device, ram and record the depth of the ramming pit one by one, and arrange 8 observation points 4 at selected positions around the edge line 5 of the ramming pit ...

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Abstract

The invention discloses a foundation reinforcement method combining carbonatite boulder dynamic-compaction with filling and replacement. The foundation reinforcement method combining carbonatite boulder dynamic-compaction with filling and replacement comprises the steps that pier bodies (3) are tamped into a weak foundation (2), and a cushion course (1) is laid on the pier bodies (3) and the weak foundation (2). According to the foundation reinforcement method combining carbonatite boulder dynamic-compaction with filling and replacement, dynamic-compaction replacement is conducted on the weak foundation (2) through high-energy-level dynamic compaction, and the surface layer is reinforced through full-compaction construction. The processed filler cushion course (1) and the boulder pier bodies (3) form a composite foundation serving as a supporting layer for a building foundation on the upper portion. By the adoption of the foundation reinforcement method combining carbonatite boulder dynamic-compaction with filling and replacement, the construction cost is greatly reduced, and the bearing force meets design and standard requirements.

Description

technical field [0001] The invention belongs to the technical field of civil engineering foundation treatment, and in particular relates to a replacement and reinforcement method for large carbonate rock foundations. Background technique [0002] With the economic development in Southwest China and the increasing number of engineering projects, it is inevitable that the construction site will encounter the problem of using the alluvial deposits in karst mountainous areas as the foundation during the construction process. This type of foundation has geotechnical engineering problems such as deep burial of underlying bedrock, weak rock strata, low bearing capacity, and large compression deformation. For this kind of weak foundation, methods such as rolling compaction, cushion replacement, drainage consolidation, vibration compaction, dynamic compaction replacement, and synthetic material reinforcement are usually used to deal with it. [0003] Wherein the dynamic compaction r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/046E02D3/12
CPCE02D3/046E02D3/123
Inventor 沈志平朱军陈德茂王鸿
Owner ZHENGYE ENG & INVESTMENT INC
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