Pushing device and method for improving horizontal load-carrying performance of low bearing platform by pushing device

Abstract

The invention discloses a pushing device and a method for improving the horizontal load-carrying performance of a low bearing platform by the pushing device, and belongs to the technical field of bridge engineering. Through the pushing device, a soil body of the side wall of the low bearing platform can be squeezed, dense gravel concrete is refilled, the defects that a high horizontal resistance effect cannot be provided due to the fact that a foundation soil body of the side wall of the low bearing platform is loose and cannot be in close contact with the side wall of the bearing platform areovercome, then the purpose of significantly improving the horizontal load-carrying performance of the low bearing platform is achieved, and the goal of improving the safety stock of pile group foundations of the low bearing platform is realized. According to the pushing device, resetting is carried out by a reset device after the soil body is compressed, main parts can be taken out of from clamping slot, so that recycling is realized, and the application cost of the pushing device is significantly reduced. The pushing device and the method provide additional safety stock for large-scale low bearing platform pile group foundations of important projects, considering of the role of the low bearing platform in the designing process of the group pile foundations is possible, and an important role is played on high horizontal design and safety applications of the large-scale pile group foundations in national bridge engineering.

Description

technical field [0001] The invention belongs to the technical field of bridge engineering, and in particular relates to a jacking device and a method for improving the horizontal bearing performance of a low bearing platform. Background technique [0002] The pile group foundation is the most widely used foundation type in bridge engineering because of its simple principle, convenient construction, and small post-construction settlement. However, in addition to the vertical load transmitted by the upper part, the pile group foundation also bears a series of horizontal loads such as wind, vehicle braking, and earthquakes. In the design process of the horizontal bearing capacity of the pile group foundation, regardless of whether the cap is buried in the foundation soil or not, it is designed as a high cap. In fact, since the interaction between the low cap and the surrounding foundation soil can provide a certain degree of horizontal resistance, the above approach will make ...

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Problems solved by technology

In fact, since the interaction between the low cap and the surrounding foundation soil can provide a certain degree of horizontal resistance, the above approach will make the design of the low cap pile group conservative, resulting in a certain degree of waste

With the continuous deepening of practice and cognition, although the designers have realized that the foundation soil is beneficial to the force bearing of the low-cap pile group foundation, they have not taken further effective measures to improve the horizontal bearing performance of the low-cap

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