In order to overcome the limitation of static load test of traditional surcharge method,a new static load test of reaction system was proposed by post-installed steel bars on the engineering pile around the test pile.Taking the CFG pile composite foundation of a high-rise building as an example,the design of the reaction system of the anchor pile with post-installed steel bars was introduced in detail.The new reaction system has been successfully applied to the static load test of CFG pile composite foundation with maximum load of 4498.2kN.Compared with tradition surcharge method,the use of counterweight can be reduced by 91.7%and the cost can be saved by 78.8%.In the new reaction system,the axial force of each post-installed steel bars is larger near the main beam and smaller away from the main beam,and the axial force of the farthest post-installed steel bars is not fully played.The new reaction method of anchor pile with post-installed steel bars has important engineering practical value for static load test.
关键词
后植筋/CFG桩/复合地基/静载试验/反力系统
Key words
post-installed steel bar/CFG pile/composite foundation/static load test/reacting system
维普
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