Concrete-filled steel tubular high-pile tower footing structure of tower crane and construction method thereof

Abstract

The invention provides a concrete-filled steel tubular high-pile tower footing structure of a tower crane and a construction method thereof, and belongs to the technical field of building construction. The concrete-filled steel tubular high-pile tower footing structure comprises four cast-in-place piles (Phi600-800) which have embedded length of 40m and are arranged at a substrate, and steel pipe columns (Phi600) which have thickness of 8mm and wrap the cast-in-place piles, wherein, bearing platforms are arranged on the upper ends of the steel pipe columns in a matching manner, the length of the lower ends of the steel pipe columns which extend into foundation soil is 2400-2480mm, the length from the upper ends of the steel pipe columns which are exposed out of the foundation soil to the bottom of the bearing platforms is 4-7m, and the length of the tops of the steel pipe columns which are anchored into the bearing platforms is 150mm; and first concrete layers are poured into the cast-in-place piles and the steel pipe columns, and second concrete layers are poured into the bearing platforms. The concrete-filled steel tubular high-pile tower footing structure and the piles for preliminary engineering can be constructed at the same time without taking up the construction period, and the tower crane can be completely installed before large-area earth excavation so as to be used in advance during the construction process of bottom plates in a basement. The structure has the advantages of simple structure, good safety, short construction period, less steel consumption and low cost, and is convenient in construction.

Description

technical field [0001] The invention belongs to the technical field of building construction, and in particular relates to a tower crane steel pipe concrete high pile tower foundation structure and a construction method. Background technique [0002] Today, with the increasing shortage of construction land, it has become an inevitable trend for the construction space to continue to develop high-altitude and underground. Tower cranes are indispensable as a vertical transportation tool. Setting up tower cranes in the basement construction phase can cooperate with basement construction, so it is necessary to set up tower crane foundations in the foundation pit before excavation of the foundation pit. [0003] Traditionally, there are the following methods for tower crane foundation: 1. The tower crane stands on the basement roof adjacent to the main building. First, the construction progress of the underground project is difficult and the progress is slow. Second, the bearing c...

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Problems solved by technology

[0003] Traditionally, there are the following methods for tower crane foundation: 1. The tower crane stands on the basement roof adjacent to the main building. First, the construction progress of the underground project is difficult and the progress is slow. Second, the bearing capacity of the basement roof structure generally cannot meet the load requirements of the tower crane. Adding vertical support under the floor also has certain technical difficulties and safety risks; 2. Before the formal excavation of the project, bury the tower foundation deeply below the basement floor and erect the tower in advance. This method seems to be simple in process, but the tower foundation The foundation pit is too deep, and the construction is difficult. It will be difficult to dismantle the tower crane in the future; 3. The steel lattice column high pile tower foundation is the steel lattice column pre-embedded at the upper end when the concrete pouring pile is constructed, and the installation plane position of the steel lattice column is easy to rotate. This method uses a large amount of steel and is expensive, and it is difficult to guarantee the welding quality of the steel lattice column; 4. For the high pile tower foundation of the concrete pouring pile, steel hoops need to be added to the pile body, and oblique steel supports are welded between the piles, which makes the construction complicated. Moreover, horizontal cracks are prone to occur within a certain range at the junction of the pile body and the cap, posing safety hazards

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