A kind of hard ground steel pipe pile and its construction method

Abstract

The present invention relates to the field of building construction, in particular to a steel pipe pile for hard ground and a construction method thereof. The steel pipe pile for hard ground includes at least two steel pipes, the bottom of the steel pipes is in contact with the hard ground, and the The hard ground corresponding to the inner space of the steel pipe is provided with a borehole, and concrete is poured into the borehole. Inside the steel pipe. For the steel pipe pile in hard stratum of the present application, during construction, when the steel pipe sinks until the hard stratum cannot sink further, a drilling rig is used to drill the hole, and then concrete is poured into the borehole and the steel pipe. Compared with the traditional In terms of method, the construction method is simple, which not only greatly simplifies the construction process, but also can coordinate and control the structural strength and stability of steel pipe piles through the depth of drilling and the height of concrete inside the steel pipe pile, so as to ensure the stability of steel pipe piles and reliability.

Description

technical field [0001] The invention relates to the field of building construction, in particular to a hard layer steel pipe pile and a construction method thereof. Background technique [0002] In the field of construction engineering technology, when a river-crossing project is involved, if the river does not allow large ships to carry equipment or enter the site as auxiliary construction equipment, it is usually necessary to set up auxiliary construction channels on the river to ensure the smooth progress of the construction. . [0003] The current auxiliary construction channels usually include pontoon bridges, steel trestle bridges and artificial islands, etc. The corresponding structures should be selected according to different actual construction situations. For example, for the turbulent water flow, artificial island construction and pontoon bridge structures should not be used as auxiliary construction channels. River, steel trestle structure has become a more com...

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Problems solved by technology

[0004] For the current steel trestle structure, it mainly includes pier piles and beams arranged on the pier piles. The beam body is usually spliced ​​by several Bailey sheets, and the pier piles are usually steel pipe piles. During construction, It is necessary to drive steel pipe piles into the soil layer, and the length of the steel pipe piles entering the soil layer must reach the design length. However, in actual construction, when the steel pipe piles are under hard strata such as sand and pebbles, it is difficult for steel pipe piles to continue. As a result, the insertion depth of steel pipe piles is not enough. In order to ensure the reliability of steel pipe pile support, the current common practice is to first use steel pipes with larger diameters to set them around the design position of steel pipe piles, and then sand and pebbles inside the steel pipes Drill holes on the upper layer, then pour concrete in the drill holes, and insert steel pipe piles into the concrete before the initial setting of the concrete. Although such a steel pipe pile structure can be relatively stable, it needs to install larger steel pipes first, and then place a larger steel pipe pile in the concrete. The operation of drilling, pouring concrete and inserting steel pipe piles in the large steel pipes, on the one hand, involves many construction procedures for installation and removal, which greatly increases the construction cost and construction period, and, because the steel pipe piles are inserted in It is difficult to accurately ensure the alignment of the bottom of the steel pipe pile, so it is difficult to control the construction accuracy of the steel pipe pile; on the other hand, it is difficult to control the insertion depth of the steel pipe pile when the steel pipe pile is inserted before the initial setting of the concrete. Prone to problems such as insertion too deep

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