Drilled rooted bottom-end-expanded bearing pile and construction method thereof
A bottom-end, pipe pile technology, applied in sheet pile wall, foundation structure engineering, construction and other directions, can solve the problems of high cost of steel pipe casing, serious loss of money, and the construction cannot be continued, and achieve good economic and social benefits. , the effect of simple pile structure
Pending Publication Date: 2022-08-02
POWERCHINA HUADONG ENG COPORATION LTD +1
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Problems solved by technology
Therefore, if the construction quality of foundation piles is ensured, the steel pipe casing cannot be pulled back, but the cost of the steel pipe casing is very high, and the construction unit will suffer a serious loss, and the construction cannot continue
Method used
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Embodiment Construction
[0021] This embodiment is a bored rooted and expanded bottom end bearing pile, which has a pipe pile and a cast-in-place reinforced concrete base, wherein the upper end of the pipe pile is exposed to the ground, and the lower end is connected to the cast-in-place reinforced concrete base rooted on the lower bearing layer.
[0022] In this example, the pipe pile can be a PHC pipe pile or a steel pipe pile, and the inner diameter of the pipe pile is required to be d. 1 Not less than 380mm. The cast-in-place reinforced concrete base is provided with a reinforcement cage, and the reinforcement cage is made of several main reinforcement bars and a spiral reinforcement. The inner diameter of the steel cage and the outer diameter d of the pipe pile 2 It is the same, and it is welded and fixed on the outer side wall of the pipe pile, and the welding must meet the requirements of relevant standards. In this embodiment, the length of the reinforcement cage is greater than twice the di...
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Abstract
The invention relates to a drilled rooted expanded-bottom end bearing pile which is provided with a tubular pile and a cast-in-place reinforced concrete base, the upper end of the tubular pile is exposed out of the ground, the lower end of the tubular pile is connected with the cast-in-place reinforced concrete base rooted on a lower bearing layer, and the periphery of the tubular pile below the ground is filled with filler. The invention further designs a construction method of the drilled rooted bottom-end-expanded bearing pile. The construction method comprises the steps that the reinforcement cage is welded to the lower end of the pipe pile; placing a pile casing after on-site lofting and positioning; forming holes according to the construction requirements of the cast-in-situ bored pile, and enabling the drilled holes to enter a bearing stratum; lowering the tubular pile and reinforcement cage connector into the drill hole; a guide pipe is lowered from the interior of the pipe pile to the bottom of the drilled hole, hole cleaning is started firstly, underwater concrete is poured after the specific gravity of sediment and slurry meets the design requirement, and a cast-in-place reinforced concrete base is formed; pulling out the guide pipe, lowering a connector of the pipe pile and the reinforcement cage to the bottom of the drill hole, and enabling the bottom end of the connector to enter a bearing stratum; and the space between the tubular pile and the pile casing is filled with filler, then the pile casing is pulled out, and pile forming is finished.
Description
technical field [0001] The invention relates to a bored rooted and expanded bottom end bearing pile and a construction method thereof. It is suitable for the field of ground treatment engineering technology. Background technique [0002] Reinforced concrete bored piles, PHC pipe piles and steel pipe piles have been widely used in the foundation treatment of industrial and civil construction, municipal, transportation, water conservancy and other projects. Different pile types are suitable for different geological conditions and environmental factors, and The project cost is also different. PHC pipe piles and steel pipe piles are prefabricated piles, which are generally constructed by driving or static pressure, and do not need a casing. They can be constructed on water and on land, but it is difficult to enter the sand and gravel layer or bedrock; reinforced concrete bored piles are generally It is constructed by drilling rig drilling or punching with an impact hammer and ...
Claims
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Patent Timeline
Login to View More IPC IPC(8): E02D5/34E02D5/38E02D3/08
CPCE02D5/34E02D5/385E02D3/08
Inventor 陈文华曾超张猛
Owner POWERCHINA HUADONG ENG COPORATION LTD