樁底注漿的灌注樁承載力研究.pdf

1、華南理工大學(xué)碩士學(xué)位論文樁底注漿的灌注樁承載力研究姓名：楊飛申請學(xué)位級(jí)別：碩士專業(yè)：建筑與土木工程指導(dǎo)教師：莫海鴻倪光樂20030401華南理工大學(xué)工程碩士學(xué)位論文AbstractTheslipcastingshallbeappliedteinforcesoilwhilethesoilstrengthatthetoeoftheend—bearingpiledoesnotprovideenoughbearingcapacityaspert

2、hedesignCurrentlytherearetwowaysofgroutingmethodforreinforcementofthecastinsituspiles：rotationjetgroutingandpressuregroutingaroundthepiletoeBothcanhelptoincreasebearingcapacityofthepilesBaseduponnumerouspracticesinthesit

3、eengineeringexperience，theauthoroftheessaytriestoelaborateonworkingsofthetwogroutingmethodapproaches，applications，computationandcastingeffects，inadditiontoanintroductiontOthesecastingapproachesAimatthecast—insiutspilesCa

4、llnotexecutetodebrisAdoptionrotationjetgroutingatthetoeoftheendbearingpile，Analysesthebearingcapacityofrotationjetsoil—cementpileswhenitisstateunderphasestressbecauseofpilesenviroumentactbysoillateralpressureTheresultsms

5、earchattestation：Forrotationjetgroutingsoil—cemenpilesinasoildepthofnotlessthan50metersdistancefromthepiletoe，theirsidethrustgeneratedbythedeadweightaroundthepileswillsignificantlyenhancethepilestrengthIfthepilingstrengt

6、hisunderapressureof12MPa，therotationjetsoil—cemenpileswillshowsanapparentlinearrelationbetween02～01；theimprovementofa1，ontheotherhand，maygreatlyincreaseverticalintensityofend—bearingpiles，whiletheconcreterotationjetgrout

7、ingpileswithapressureofabove12MPapresentanon—linearrelationbetween02～oITheconclusionisattestedinxinghaiZhonghelouproject27#pilestaticloadtestwhenitisstateunderphasestressbecauseofpilesenviroumentactbysoillateralpressure：

8、Thestrengthoftherotationjetsoil—cementpileincreased136％thebearingcapacityofthecastinsituspileincreased1l_3％contrasttherotationjetsoilcementpilesenviroumentnoactbysoillateralpressureAimatthepressuregroutingmethodatthecast

9、insiutspilestoeThroughthestatisticalanalysis136piles，thefollowingconclusionshavebeenreached：Aroundthepiletoeinthecaseofclayedandmuddysoils，thegroutingeffectsisnotsatisfactoryastheincreaseofthebearingcapacityafterreinforc