Broken soil vibration and compaction treatment method by utilizing impact hammer in immersed tube in riprap filled foundation

Abstract

The invention relates to a method for carrying out shallow and deep foundation treatment on a common riprap filled foundation in the civil engineering. The method comprises the following steps of: when an immersed tube can not be vibrated and impacted while meeting broken stones, such as dimension stones, and the like in the foundation, starting a freely-falling body impact hammer in the immersed tube to carry out impacting and crushing on the dimension stones by utilizing a newly-developed broken soil vibrating pile squeezer-expander with the impact hammer in the immersed tube as well as special structures of the tube head, and simultaneously carrying out crushing and squeezing-expanding on the dimension stones by combining the vibration and the impact of a vibration hammer of the immersed tube; if necessary, filling concrete, broken stones, sands, slag, and the like in the immersed tube, and carrying out impacting, squeezing-expanding and compaction treatment on the shallow layer and the deep layer of the filled foundation. In the method, the reinforcing treatment, such as grouting, and the like can be carried out in the tube immersing process according to requirements; an engineering pile can be directly constructed on the foundation that needs subjacent bed filling treatment; and a soft subjacent layer can also be reinforced by adopting a high pressure grouting or jet grouting pile so as to satisfy various engineering requirements to the foundation.

Description

technical field [0001] The invention relates to a new technology for the foundation treatment of random rockfill - a method for treating the foundation by vibrating and compacting the soil crushed by an impact hammer in an immersed tube. This technology is mainly aimed at the treatment of rock-filling foundations formed by opening mountains and filling ditches and seas (lakes and rivers), and is used for the reconstruction of roads and bridges, water conservancy, municipal pipelines, industrial and civil buildings and other engineering projects on such foundations. A new method of foundation treatment is provided. Background technique [0002] In the construction of civil engineering such as road and bridge projects, water conservancy projects, municipal pipeline projects, industrial and civil construction projects, mountain and ditch filling, mountain filling and sea filling, lake filling and river filling are often carried out according to the needs, thus forming such rand...

AI Technical Summary

Problems solved by technology

[0004] 2. The arrangement skeleton of the particles in the filling layer is very uneven, there are large gaps and instability, and it is easy to rearrange the particles under external force to cause local collapse;

[0005] 3. The thickness, burial depth and distribution of the filling layer are very uneven. The bedrock is exposed in the thin and shallow part, and the thick part can reach tens of meters;

[0006] 4. There are often soft underlying layers under the filling layer, especially in lake and sea projects, the foundation is still sinking under the action of the filling layer, and the deformation is far from stable

[0007] Because the particles and distribution of this kind of random rockfill foundation are extremely uneven, the current various pile types can hardly pass through and form piles, and the only punching and grabbing piles also have disadvantages such as difficulty in pile formation, slow construction speed, and high cost.

In addition, the current dynamic compaction method and grouting method for dealing with this type of fill are limited due to their limited treatment depth and inability to solve the strength, deformation and stability problems of the soft substratum

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