1results about How to "Operational impact is small" patented technology

The application discloses a kind of construction methods for reducing existing railway pier cap, comprising the following steps: S1, in the range of existing pile foundation, construction new pile foundation is added;Construction newly-built cap;S2, construction first-pouring part of lengthening pier body;Construction support system on newly-built cap;S3, according to design requirements, simultaneously apply jacking force of jacking equipment to support system to tighten existing cap;S4, cut off the connection between existing pile foundation and existing cap, then simultaneously apply jacking force of jacking equipment, remove the stress of support system;S5, remove support system and existing pile body above the top surface of newly-built cap, cut off the excess part of existing cap;S6, on the cut-off surface of existing pier body and excess part of existing cap, plant reinforcement, construction outer package post-cast part of lengthening pier body.The application uses existing cap, existing pile foundation and newly-built cap with reduced new pile foundation, lengthening pier body to carry out two stress system conversions, instead of the construction of temporary portal pier, reduce engineering quantity and construction difficulty.