Method for reinforcement of foundation ground

Abstract

A construction method for reinforcing a foundation, the steps of which are: driving an outer casing into the foundation to a specified depth; filling reinforcement material into the outer casing, and tamping the filled reinforcement material with a rammer until the tamped reinforcement material The compactness of the ground meets such a hammer-retracting standard, so that the soil on the surface of the foundation reaches the maximum compactness, and at the same time, the surface does not produce uplift; the outer casing is lifted at the same height, and the above-mentioned second step is repeated to carry out layered filling and filling. The tamping action reaches the surface of the foundation, so that the compactness of the compacted pile body material and the soil around the pile remains uniform.

Description

technical field [0001] The invention relates to the field of civil engineering, in particular to reinforcement treatment of foundations. Background technique [0002] In the ground reinforcement treatment of buildings, the dynamic compaction method is often used, but this method has the disadvantage of relatively large vibration, so it is not suitable for construction in cities with dense buildings. It is disclosed in the utility model patent document CN86200550U A method of forming rammed-expanded-compacted gravel piles in foundations by tamping is proposed. In this method, the pile hammer does not directly hit the filler, but rams the filled material through the core pipe and the plug at its bottom end. Crushed stone, the disadvantage of this method is that the tamping energy for the filler is small, especially the compactness of each layer of rammed material cannot be controlled, so that the compactness of the pile body material and the soil around the pile cannot be kept...

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Problems solved by technology

[0002] In the ground reinforcement treatment of buildings, the dynamic compaction method is often used, but this method has the disadvantage of relatively large vibration, so it is not suitable for construction in cities with dense buildings. It is disclosed in the utility model patent document CN86200550U A method of forming rammed-expanded-compacted gravel piles in foundations by tamping is proposed. In this method, the pile hammer does not directly hit the filler, but rams the filled material through the core pipe and the plug at its bottom end. Crushed stone, the disadvantage of this method is that the tamping energy for the filler is small, especially the compactness of each layer of rammed material cannot be controlled, so that the compactness of the pile body material and the soil around the pile cannot be kept uniform , the material of the pile body and the soil around the pile cannot be fully mobilized to participate in the force, that is, the bearing capacity of the formed composite foundation is small

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