山东大学学报（工学版）
山東大學學報（工學版）
산동대학학보（공학판）
JOURNAL OF SHANDONG UNIVERSITY(ENGINEERING SCIENCE)
2015年
3期
86-94
,共9页
柱式桥台%锚杆挡墙%劈裂注浆%强度折减法
柱式橋檯%錨桿擋牆%劈裂註漿%彊度摺減法
주식교태%묘간당장%벽렬주장%강도절감법
buried abutment%anchored retaining wall by tie rods%the Soletanche method%strength reduce method
为了增加桥下被交道路的通行空间，采取袖阀管劈裂注浆加固柱式桥台台后主动压力区土体及台前被动压力区土体，并在分段分级挖除台前填土过程中增设锚杆钢筋混凝土挡墙的内外部双重加固措施；采用Abaqus6.10非线性分析软件，建立柱式桥台前坡加固改造的三维弹塑性模型，模拟分析柱式桥台前坡全断面一次挖除、分段分级挖除两种方案的开挖过程和路基边坡稳定性，确定了路基加固范围；现场监控开挖过程中的墙顶位移和锚杆拉力，分析了土体开挖、挡墙施工过程中的稳定性。研究结果表明：全断面分级开挖支挡方案的稳定安全系数为1.61，路基边坡分段分级开挖支挡方案的稳定安全系数为1.84，分段分级方案更加安全；墙顶位移主要发生在施工期，其间锚杆拉力没有发生突变，挡墙及墙后土体安全稳定；台前与台后劈裂注浆加固，有效提高了加固区土体的抗剪强度和抗变形能力，开挖过程中无坍塌、掉落、滑移等现象。
為瞭增加橋下被交道路的通行空間，採取袖閥管劈裂註漿加固柱式橋檯檯後主動壓力區土體及檯前被動壓力區土體，併在分段分級挖除檯前填土過程中增設錨桿鋼觔混凝土擋牆的內外部雙重加固措施；採用Abaqus6.10非線性分析軟件，建立柱式橋檯前坡加固改造的三維彈塑性模型，模擬分析柱式橋檯前坡全斷麵一次挖除、分段分級挖除兩種方案的開挖過程和路基邊坡穩定性，確定瞭路基加固範圍；現場鑑控開挖過程中的牆頂位移和錨桿拉力，分析瞭土體開挖、擋牆施工過程中的穩定性。研究結果錶明：全斷麵分級開挖支擋方案的穩定安全繫數為1.61，路基邊坡分段分級開挖支擋方案的穩定安全繫數為1.84，分段分級方案更加安全；牆頂位移主要髮生在施工期，其間錨桿拉力沒有髮生突變，擋牆及牆後土體安全穩定；檯前與檯後劈裂註漿加固，有效提高瞭加固區土體的抗剪彊度和抗變形能力，開挖過程中無坍塌、掉落、滑移等現象。
위료증가교하피교도로적통행공간，채취수벌관벽렬주장가고주식교태태후주동압력구토체급태전피동압력구토체，병재분단분급알제태전전토과정중증설묘간강근혼응토당장적내외부쌍중가고조시；채용Abaqus6.10비선성분석연건，건립주식교태전파가고개조적삼유탄소성모형，모의분석주식교태전파전단면일차알제、분단분급알제량충방안적개알과정화로기변파은정성，학정료로기가고범위；현장감공개알과정중적장정위이화묘간랍력，분석료토체개알、당장시공과정중적은정성。연구결과표명：전단면분급개알지당방안적은정안전계수위1.61，로기변파분단분급개알지당방안적은정안전계수위1.84，분단분급방안경가안전；장정위이주요발생재시공기，기간묘간랍력몰유발생돌변，당장급장후토체안전은정；태전여태후벽렬주장가고，유효제고료가고구토체적항전강도화항변형능력，개알과정중무담탑、도락、활이등현상。
In order to get more traffic clearance under bridge during the road upgrading transformation,an internal and external reinforcement program was proposed to the underpass grade separation.The internal program was the soil rein-forcement by the Soletanche method to active pressure soil and passive pressure soil of the abutment,and the external program was the anchored retaining wall by tie rods.Based on Abaqus6. 10,the nonlinear FEM software,a 3D elastic-plastic numeric model was built to simulate the transformation process from buried abutment slope to anchored retaining wall.Two kinds of the construction processes were simulated,one was the slope soil excavation in layer vertically only and the other was in section horizontally and in layer vertically,and the soil reinforcement area was determined.Based on site detections to the top displacement and the bolt tension force of the retaining wall,stability analysis during the soil excavation and the wall construction were done,and the anchor pull test was carried out.The results indicated that the stability factor of the slope soil excavation program in layer vertically was 1. 61,while the program in layer vertically and in section horizontally was 1. 84,and the latter program was better.The top displacement of the wall increased mainly during the construction process,and the tension forces of the bolt did not change suddenly,and the wall and the soil behind the wall were stable.The soil reinforcement by the Soletanche method could enhance the soil shear strength and the resistance to deformation,and there was no collapse,fall,and slip during the construction process.
