The Head, Foot Of Rigid Piles

In the field of ground improvement,there is no investigation and practice by way of patent innovation designedly.In this paper,based on the proprietary technology of Rigid Piles,following research works are achieved:1,Put forward the concept of Patent Innovation,and the significance of independent intellectual property rights are discussed.2,Compare the traditional classification of ground improvement with IPC(international patent classification).Exceed conventional rules to expatiate rigid piles from three parts,that is head,body,and foot.Seek invention inspiration from the results,achievements and patents available.3,Classify,induce,summarize and compare the following rigid piles,which are widely used,from functions,patents applying, interrelated technics and so forth:1).The cast-in-situ concrete large-diameter tubular piles and the Piles with cast-in-place cor are all innovate by changing their cross section.2).The cast-in-situ piles with expanded branches and plates and post-pressure grouting are invented by by changing their vertical section.3}.Multi-piles can be regarded as changing the vertical section on broad sense.4).Space-varying rigidity change the macroscopical section.5).Both the Static Replacement and ram-compaction piles with composite bearing base are all try to make an enlarged base on the foot of a pile.6).The way to change the conformation of pile head,which include:a certain gap between foundationslab and pile head, displacement adjusting,and pile partner.4,Applied for two patents on the invention of "Hoop Beside Pile-head and Pile with Hoop"(200710160966.1,for visual saying:pile partner)and "Static Replacement Method for Ground Treatment and the All-purpose Press Pipe"(200610009144.9,for.short:Static Replacement).Share the way of thinking,contents,studying status in quo about the two patents of Static Replacement and Pile Partner.5,Put forward the Time-Sedimentation Curve that can indicate the life-cycle sedimentation of a project,and the fabric and calculation methods to obtain it.