H-shaped double-row pile structure provided with core-entraining jet grouting pile

A technology of jet grouting piles and double-row piles, which is applied in foundation structure engineering, sheet pile walls, excavation, etc., can solve the problems of excessive displacement of pile bodies and weak anti-overturning ability, so as to reduce pile length, save engineering cost, Effect of increasing stability and stiffness against overturning

Active Publication Date: 2015-07-08
YUNNAN JIANTOU FOUND ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, with the emergence of ultra-deep foundation pits, the h-type double-row pile structure usually faces the problems of excessive pile displacement and weak anti-overturning ability during the excavation process of some ultra-deep foundation pits

Method used

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  • H-shaped double-row pile structure provided with core-entraining jet grouting pile
  • H-shaped double-row pile structure provided with core-entraining jet grouting pile
  • H-shaped double-row pile structure provided with core-entraining jet grouting pile

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Example 1 :Such as figure 1 , 2 As shown, a h-shaped double-row pile structure with cored rotary grouting piles consists of front row piles 1, rear row piles 2, rotary grouting piles 3, prefabricated reinforced concrete square piles 4, enlarged head anchors 5, crowns It consists of beam Ⅰ6, crown beam Ⅱ7, crown beam Ⅲ8 and connecting beam 9. From the inner side of the pile top platform of the front row of piles 1, the jet grouting piles 3 with a large inclination angle are arranged between the piles of the rear row of piles 2 in each group. The rotary grouting pile 3 adopts segmental rotary grouting construction, and the diameter of the rotary grouting at the end position increases correspondingly to form an enlarged head anchor body 5 . After the construction of the rotary grouting pile 3 is completed, the prefabricated reinforced concrete square pile 4 is inserted thereinto before its quality becomes stable. The front row of piles 1 and the rear row of piles 2 ar...

Embodiment 2

[0034] Example 2: Such as figure 1 , 3 As shown, an h-shaped double-row pile structure with cored jet grouting piles consists of front row piles 1, rear row piles 2, jet grouting piles 3, prefabricated reinforced concrete square piles 4, crown beam Ⅰ 6, and crown beam Ⅱ 7 , crown beam III8 and connecting beam 9. From the inner side of the pile top platform of the front row of piles 1, the jet grouting piles 3 with a large inclination angle are arranged between the piles of the rear row of piles 2 in each group. The rotary grouting pile 3 adopts continuous rotary grouting construction, and after the construction is completed, the prefabricated reinforced concrete square pile 4 is inserted into it before its quality becomes stable. The front row of piles 1 and the rear row of piles 2 are bored cast-in-situ piles, arranged in parallel and in an h-shape. The rotary grouting pile 3 adopts the double pipe method for segmental rotary grouting construction, the diameter is 0.6~1....

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Abstract

The invention discloses an h-shaped double-row pile structure provided with a core-entraining jet grouting pile, and belongs to the field of building foundation pit engineering. The h-shaped double-row pile structure comprises a plurality of front rows of piles, a plurality of rear rows of piles, the jet grouting pile, a precast reinforced concrete square pile, an expanded-head anchoring body, a top beam I, a top beam II, a top beam III and a connecting beam, wherein the front rows of piles and the rear rows of piles are arranged in parallel and form an h shape; the top beam I, the top beam I and the top beam III are respectively arranged on each front row of pile, each rear row of pile and the jet grouting pile; the top beam I and the top beam II are connected through the connecting beam; the jet grouting pile with a large inclination angle is arranged between the piles in each group of rear rows from the inner side of a pile top platform of each front row of piles; the jet grouting pile is constructed by a sectional jet grouting manner, and the jet grouting diameter of the tail end is correspondingly increased to form the expanded-head anchoring body; after the construction of the jet grouting pile, the precast reinforced concrete square pile is inserted into the jet grouting pile before the mass is stabilized; the jet grouting solidifying body in sectional construction can be closely matched with the earth at the back of the pile and integrally connected with the earth at the back of the pile through a precast reinforced concrete pile.

Description

technical field [0001] The invention relates to a double-row pile structure, in particular to an h-shaped double-row pile structure provided with cored rotary grouting piles, and belongs to the field of building foundation pit engineering. Background technique [0002] With the gradual advancement of the urbanization process, there are more and more deep foundation pit projects, and the construction difficulty is becoming more and more difficult, and various foundation pit support methods have emerged. The double-row pile support structure has been widely used in the domestic deep foundation pit engineering field in recent years because of its good deformation control effect, strong support structure stability, and strong applicability. As one of many types of double-row pile structures, the h-type double-row pile structure can give full play to the advantages of grading, and the project cost is lower. [0003] However, with the emergence of ultra-deep foundation pits, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D17/04
CPCE02D5/20E02D17/04
Inventor 许利东王晓曙涂伟曹慧郑云刚王向敏余琨琳
Owner YUNNAN JIANTOU FOUND ENG CO LTD
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