Construction method of foundation pit slope supported independent pile tower crane foundation
A technology of tower crane foundation and construction method, which is applied in the direction of foundation structure engineering, sheet pile walls, buildings, etc., and can solve the problems of low axial bearing capacity and anti-overturning ability, and cannot be used as a tower crane
Active Publication Date: 2010-07-07
JIANGSU HUAJIAN CONSTR
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Problems solved by technology
[0002] Generally, the main function of the retaining piles supported by deep foundation pits is to resist lateral earth pressure during construction and prevent the soil layer from collapsing and sliding on the side slope of the foundation pit. Their axial bearing capacity and anti-overturning capacity are low, so they cannot be used as tower cranes. base for
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[0016] Such as figure 1 , shown in Fig. 2, Fig. 3, first carry out geological drilling analysis at 10 places of the foundation pit slope of building 8 and basement 9, formulate the construction plan; dig holes at the foundation pit slope according to the plan, pump water while digging, support Retaining formwork, pouring concrete retaining wall; when the digging hole reaches the design depth, enlarge the diameter of the hole bottom, clean the bottom of the hole, drain the water, pour the bottom concrete to form the enlarged head 2; pour concrete into the independent support pile from the bottom 1. The tower crane cap foundation 3 installed with tower crane 4 is poured on the top of the independent support pile. The diameter of the independent support pile is equal to or greater than 1.42 times the side length of the standard section of the tower body, and the depth of the independent support pile is equal to or greater than that of the independent support pile. 1.5 times of t...
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The invention discloses a method for constructing an independent pile tower crane foundation supported on an excavation slope. The steps are as follows: geologic drilling analysis is carried out on the excavation slope to draw up a construction scheme; according to the scheme, holes are dug on the excavation slope, water is pumped during the operation of digging the holes, retaining wall mouldingboards are supported, and concrete retaining walls are cast. The diameter of each hole bottom is enlarged, and backing concrete is cast to form an expansion head. Independent supporting piles and thetower crane bearing foundation are cast by the concrete, the diameter of the independent supporting pile is equal to or larger than 1.42 times of the side length of each standard knot of a tower body, the depth of the independent supporting pile is equal to or larger than 1.5 times of the height of a pile foundation suspension arm, and the top face of the tower crane bearing foundation is lower than a natural terrace. The construction method has the advantages of low production cost, reliable quality, simple machines and equipment, convenient construction and operation and higher single-pile bearing force, thereby meeting the requirement of casting the tower crane bearing platform foundation; and the construction method has no noise during construction, no discharge of mud solution, little effect on ambient environment and buildings and small space occupation.
Description
technical field [0001] The invention relates to a tower crane foundation for supporting independent piles at the side slope of a foundation pit, and also relates to its design and construction method, belonging to the technical field of building construction. Background technique [0002] Generally, the main function of the retaining piles supported by deep foundation pits is to resist lateral earth pressure during construction and prevent the soil layer from collapsing and sliding on the side slope of the foundation pit. Their axial bearing capacity and anti-overturning capacity are low, so they cannot be used as tower cranes. base use. When the tower crane foundation cannot be installed in the foundation pit and near the edge of the foundation pit due to geological and site conditions, one of the retaining piles on the side slope of the foundation pit is selected locally to support the foundation pit with artificially dug hole piles, and uses The independent pile is used ...
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IPC IPC(8): E02D5/34B66C23/20E02D27/14E02D5/44
Inventor 朱国梁吴碧桥朱学农张传捷
Owner JIANGSU HUAJIAN CONSTR