Treatment method for hydraulic structure foundation

A treatment method and technology for structures, which are applied in construction, soil protection, infrastructure engineering, etc., can solve problems such as difficulty in guaranteeing the quality of the surface layer, and achieve the effect of improving the quality and strength of the surface layer.

Active Publication Date: 2021-09-07
CCCC THIRD HARBOR ENG +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when dealing with underwater foundations, especially the backfill sand and undisturbed sand are coarse sand or medium-fine sand foundations with a fine particle content (part

Method used

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  • Treatment method for hydraulic structure foundation
  • Treatment method for hydraulic structure foundation
  • Treatment method for hydraulic structure foundation

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with accompanying drawing.

[0030] see Figure 1 to Figure 4 , the processing method of hydraulic structure foundation of the present invention, comprises the following steps:

[0031] Step 1: Excavate a foundation trench 100 at the installation position of the hydraulic structure on the seabed, leave 3m thick undisturbed sand 101 at the bottom of the foundation trench 100 without excavation, and conduct foundation trench acceptance according to the double control of elevation and bearing layer;

[0032] Step 2, blasting sand into the foundation groove (see figure 1 ), including the following steps:

[0033] Process 2.1, a sand pumping control platform 10 is fixed on the water surface next to the sand pile 200 on the bank through a figure-eight anchor, the front end of the sand pumping control platform 10 is hinged to a sand pumping pipe 11, and the front end of the sand pumping pipe 11 is connected...

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Abstract

The invention discloses a treatment method for a hydraulic structure foundation. The treatment method comprises the following steps that 1, a foundation trench is excavated at the mounting position of a hydraulic structure on a seabed, and undisturbed sand with enough thickness is reserved at the bottom of the foundation trench; 2, sand is thrown into the foundation trench until the replacement and filling sand in the foundation trench reaches the designed elevation; 3, a crawler crane is placed on a flat barge; 4, a vibroflot is adopted for carrying out vibroflotation reinforcement on the foundation of a foundation bed, the vibroflotation width is the sum of the bottom width of the foundation trench and the two sides expanded outwards by 5 m, and the vibroflotation thickness is the bottom elevation from the design elevation of the replacement and filling sand in the foundation trench to the undisturbed sand; and 5, the surface layer of the foundation bed is tamped and reinforced by adopting a rammer. According to the treatment method, the combined treatment mode of a vibroflotation method and a dynamic compaction method is adopted, the surface layer quality of the treated foundation can be greatly improved, the overall treatment effect of the foundation can be improved, and the strength and impermeability and liquefaction resistance of the treated foundation are improved.

Description

technical field [0001] The invention relates to a treatment method for foundations of hydraulic structures. Background technique [0002] When constructing a hydraulic structure, the foundation of the hydraulic structure must first be treated to improve the strength, impermeability and liquefaction resistance of the foundation. Among the treatment methods of foundations of hydraulic structures, the vibro-shock method is a foundation reinforcement treatment method to improve bad foundations and meet the foundation requirements of buildings (structures). The vibration force generated by the vibrator in the horizontal or vertical direction, supplemented by pressure water to vibrate the surrounding soil, achieves a foundation treatment method that improves the bearing capacity of the foundation, increases the stability of the foundation, reduces the amount of settlement, and improves the ability to resist earthquake liquefaction. The vibrating method is divided into the vibrati...

Claims

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Application Information

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IPC IPC(8): E02D3/054E02D3/046
CPCE02D3/054E02D3/046
Inventor 范剑祥林志捷薛宏伟邓凯陈少梅许少雄林宇
Owner CCCC THIRD HARBOR ENG
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