Pit-in-pit horizontal supporting structure in deep foundation pit and construction method thereof

Abstract

The invention relates to the technical field of pit-in-pit supporting structures in deep foundation pits and discloses a pit-in-pit horizontal supporting structure in the deep foundation pit and a construction method of the pit-in-pit horizontal supporting structure. The horizontal supporting structure comprises multiple support piles, waist beams, multiple supporting beams and multiple engineering piles. The support piles are arranged at intervals along one side of a pit in the pit, the waist beams are connected to the support piles respectively, the supporting beams are placed on the two sides of the pit in the pit, and the engineering piles are placed on the two sides in the pit in the pit respectively. One end of each supporting beam is connected to the corresponding waist beam, and the other end of each supporting beam is connected with the engineering pile on the same side. According to the horizontal supporting structure, the engineering piles are used as horizontal force bearing components, the support piles and the engineering piles are connected into a whole through the waist beams and the supporting beams, and soil pressure borne by the support piles can be transmitted to the engineering piles. Therefore, anchor rods do not need to be arranged, cost is saved, the construction period is shortened, and the potential safety hazards caused by difficulty of control over construction quality of the anchor rods can be avoided.

Description

technical field [0001] The invention relates to the technical field of a pit-in-pit support structure in a deep foundation pit, in particular to a horizontal support structure for a pit-in-a-pit in a deep foundation pit and a construction method thereof. Background technique [0002] In building deep foundation pit engineering, the bottom of the elevator shaft and water collection well is usually lower than the basement floor. For example, the elevator shaft is generally 3~5m lower than the rest of the basement floor. Deep small foundation pits, thus forming the phenomenon of "pit in pit". [0003] In deep foundation pit engineering in densely built areas, row piles + prestressed anchor cables or row piles + internal support structures are usually used. For the pile row + prestressed anchor cable support structure, the anchor cable is used as the horizontal force transmission member and the waist beam and support piles are used as the support system. If the pit-in-pit is f...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a horizontal support structure for a pit-in-a-pit in a deep foundation pit, aiming to solve the problems of difficult construction work, high cost, and long construction period in the prior art where a horizontal support and anchor structure is installed at a pit-in-a-pit

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