西安建筑科技大学学报（自然科学版）
西安建築科技大學學報（自然科學版）
서안건축과기대학학보（자연과학판）
JOURNAL OF XI'AN UNIVERSITY OF ARCHITECTURE & TECHNOLOGY
2014年
1期
90-95
,共6页
高速铁路%群桩基础%静置时间%压力注浆%现场试验
高速鐵路%群樁基礎%靜置時間%壓力註漿%現場試驗
고속철로%군장기출%정치시간%압력주장%현장시험
high speed railway%pile group foundation%waiting time%pressure grouting%site test
为了预测高速铁路桥梁群桩基础在压力注浆加固后的静置时间，提出无砟轨道铺设时间的合理建议。通过开展京沪高速铁路丹阳至昆山特大桥阳澄湖桥段群桩基础现场压力注浆试验，对试验段群桩基础架梁前后沉降全过程观测，得到近600 d实测沉降数据，结合《京沪沉降评估细则》及《客运专线无砟轨道评估技术指南》关于沉降稳定的判别标准，将实测沉降与曲线拟合法预测沉降进行对比分析，预测出群桩基础的静置时间。预测结果表明：从架梁后起算，未注浆群桩基础静置时间约为55～100 d；桩侧注浆群桩基础静置时间约为50～90 d；桩端注浆群桩基础静置时间约为30～55 d 。建议未注浆、桩侧注浆、桩端注浆群桩基础的无砟轨道铺设时间分别不宜少于架梁后100 d ，90 d和60 d 。
為瞭預測高速鐵路橋樑群樁基礎在壓力註漿加固後的靜置時間，提齣無砟軌道鋪設時間的閤理建議。通過開展京滬高速鐵路丹暘至昆山特大橋暘澄湖橋段群樁基礎現場壓力註漿試驗，對試驗段群樁基礎架樑前後沉降全過程觀測，得到近600 d實測沉降數據，結閤《京滬沉降評估細則》及《客運專線無砟軌道評估技術指南》關于沉降穩定的判彆標準，將實測沉降與麯線擬閤法預測沉降進行對比分析，預測齣群樁基礎的靜置時間。預測結果錶明：從架樑後起算，未註漿群樁基礎靜置時間約為55～100 d；樁側註漿群樁基礎靜置時間約為50～90 d；樁耑註漿群樁基礎靜置時間約為30～55 d 。建議未註漿、樁側註漿、樁耑註漿群樁基礎的無砟軌道鋪設時間分彆不宜少于架樑後100 d ，90 d和60 d 。
위료예측고속철로교량군장기출재압력주장가고후적정치시간，제출무사궤도포설시간적합리건의。통과개전경호고속철로단양지곤산특대교양징호교단군장기출현장압력주장시험，대시험단군장기출가량전후침강전과정관측，득도근600 d실측침강수거，결합《경호침강평고세칙》급《객운전선무사궤도평고기술지남》관우침강은정적판별표준，장실측침강여곡선의합법예측침강진행대비분석，예측출군장기출적정치시간。예측결과표명：종가량후기산，미주장군장기출정치시간약위55～100 d；장측주장군장기출정치시간약위50～90 d；장단주장군장기출정치시간약위30～55 d 。건의미주장、장측주장、장단주장군장기출적무사궤도포설시간분별불의소우가량후100 d ，90 d화60 d 。
In order to predict the waiting time for the pile group foundation of the high-speed railway bridge by pressure grouting and strengthening, a reasonable advice of the time for the ballast less track laying is put forward. Through carrying out the field test for the pressure grouting in strengthening the pile group foundation on one section of the Danyang-Kunshan long-span Bridge of Yangcheng Lake on the Beijing-Shanghai high-speed railway and the whole sedimentation process observation of the test section, 600 days’ measurement sedimentation data were obtained. By combining the criterions of steady subsidence of “Beijing-Shanghai Sedimentation Assessment Rules”with that of“the guideline of Evaluation Techniques to Unballasted Track on Passenger Dedicated Line”, the sedimentation data by actual measurement and the predicted data by curve fitting method were compared and analyzed. Then the waiting time of the pile foundation was predicted. The results show that after the girder erection, the waiting time of non-grouting pile group foundation is about 55 to 100 days;the waiting time of pile sides grouting is about 50 to 90 days;and the waiting time of pile bottom grouting is about 30 to 55 days. It is advisable that the waiting time of non-grouting, pile sides grouting and pile bottom grouting on the unballasted track should not be less than 100 days, 90 days and 60 days respective after girder erection.
