Double-row pile structure with cored horizontal rotary jet grouting pile on pile body
A technology of horizontal jetting piles and double-row piles, which is applied in foundation structure engineering, sheet pile wall, excavation, etc., can solve the problems of large displacement of piles and weak anti-overturning ability, and achieves increased anti-overturning ability and rigidity, and saves money. Project cost and effect of controlling pile displacement
Active Publication Date: 2015-04-29
YUNNAN JIANTOU FOUND ENG CO LTD
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Problems solved by technology
However, with the emergence of ultra-deep foundation pits, conventional double-row pile structures (such as portal double-row pile structures or h-type double-row pile structures) sometimes face excessive pile displacement and overturning resistance during the excavation of ultra-deep foundation pits. less able problems
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Embodiment 1
[0031] Example 1: if figure 1 , 2 As shown, a pile body is equipped with a double-row pile structure with cored horizontal jet grouting piles, which consists of front row piles 1, rear row piles 2, jet jet piles 3, prefabricated reinforced concrete square piles 4, pre-embedded pipe I5, prefabricated piles Buried pipe Ⅱ6, crown beam Ⅰ7, crown beam Ⅱ8, connecting beam 9, expansion head anchor 10 and waist beam 11. During the construction of the front row of piles 1 and the rear row of piles 2, pre-embedded pipes I5 and I6 of the same diameter were pre-embedded at the same depth on the steel cage respectively. To the depth position of the embedded pipe, construct the horizontal jet grouting pile 3 along the embedded pipe in the pile body of the front and rear row piles. The rotary grouting pile (3) adopts segmental rotary grouting construction, and the positions between the front and rear rows of piles are all consolidated by rotary grouting, and the diameter of the rotary gr...
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The invention discloses a double-row pile structure with a cored horizontal rotary jet grouting pile on the pile body, and belongs to the field of building foundation pit engineering. A first crown beam and a second crown beam are respectively arranged at the top ends of the front-row pile and the rear-row pile, and are connected by a connecting beam. During the construction process of the front-row pile and the rear-row pile, first embedded pipes with the same diameters are respectively embedded at the positions with the same depths in the reinforcement cages; after the pile-forming construction is completed, when the foundation pit is excavated to the depth position of the embedded pipes, the horizontal rotary jet grouting pile is constructed along the embedded pipes in the front-row pile body and the rear-row pile body. The rotary jet grouting pile is constructed by rotary jet grouting segment by segment, the positions between the front-row pile and the rear-row pile completely subjected to rotary jet grouting and solidified, and the rotary jet grouting diameter of the tail position is correspondingly increased to form an anchor body with an enlarged head. After the construction of the rotary jet grouting pile completed, before the pile body quality is stable, a prefabricated reinforced concrete square pile is inserted into the pile body, and thereby the double-row pile structure with the cored horizontal rotary jet grouting pile on the pile bodies is formed.
Description
technical field [0001] The invention relates to a double-row pile structure, in particular to a double-row pile structure with a core-filled horizontal jet grouting pile, belonging to the field of building foundation pit engineering. Background technique [0002] With the rapid development of urban construction, there are more and more deep foundation pit projects, and the construction difficulty is also increasing, 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. However, with the emergence of ultra-deep foundation pits, conventional double-row pile structures (such as portal double-row pile structures or h-type double-row pile structures) sometimes face excessive pile displacement and overturning resistance during the excavation o...
Claims
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IPC IPC(8): E02D17/04E02D5/44E02D5/46
CPCE02D5/44E02D5/46E02D17/04
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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