Method for treating foundation by combined hammers

Abstract

The invention discloses a method for treating foundation by combined hammers. Three hammer bodies, including a column hammer, a middle hammer and a flat hammer which are of different shapes, intensities of pressure and specific gravities, are utilized for tamping loose foundation soil layer by layer according to certain programs and technical requirements, so as to realize the aim of consolidating the foundation soil in deep, middle and superficial layers. Compared with the common heavy-tamping method and other pile work composite foundation treatment methods, the method of the invention can make the effective consolidation depth and the reinforced effect of compacting soil among piers prominent and can treat the loose and soft foundation soil of which the thickness reaches nearly 20 meters, the depth and the diameter of a tamped pit can be respectively adjusted, and the tamped pit can be backfilled with original soil or other replacement materials to form a tamped pier or a replacement pier; and therefore the bearing capacity of the foundation can be greatly improved, and the settling amount and the differential settlement of buildings can be directly reduced. The method can fully utilize various on-site soil materials and utilize huge amounts of waste skeletal materials of construction waste from city removal, reduce the cost of treating the foundation and save high energy consumption materials (rolled steel products and cement), and has obvious effects of environment protection and energy conservation.

Description

technical field [0001] The invention relates to a civil engineering foundation reinforcement treatment method, in particular to a combined hammer method foundation treatment technology method for treating soft foundations and composite foundations. Background technique [0002] In civil engineering construction, it is generally necessary to strengthen the soft foundation first to improve the strength, bearing capacity and stability of the foundation soil before the next construction can be carried out. The current dynamic compaction foundation treatment technology uses a single heavy hammer to repeatedly ram the soft foundation, and the reinforcement depth is limited. When the soft foundation soil layer is thick, the compaction effect of the deep soil is poor, and the strength increase is low, which often fails to meet the design requirements. Using the traditional dynamic compaction replacement method, although the replacement pier can be formed, the bottoming effect is no...

AI Technical Summary

Problems solved by technology

The current dynamic compaction foundation treatment technology uses a single heavy hammer to repeatedly ram the soft foundation, and the reinforcement depth is limited.

When the soft foundation soil layer is thick, the compaction effect of the deep soil is poor and the strength improvement is low, which often fails to meet the design requirements

Using the traditional dynamic compaction replacement method, although the replacement pier can be formed, the bottoming effect is not easy to control, the soil between the pier is poorly compacted, and the bearing capacity often fails to meet the design requirements

Therefore, there are many helplessness in the traditional foundation treatment technology. The cost, construction period, and quality often lose sight of the other, and some do not meet the requirements of environmental protection.

Images