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1、马旦皮提亚废污水泵站咬合桩墙施工 斯里兰卡, 科伦坡 2005年8月 MADAMPITIYA SEWERAGE PUMPING STATION SECANT PILE WALL PROJECT COLOMBO, SRI LANKA, August 2005,MADAMPITIYA SECANT PILE WALL PROJECT 咬合桩墙平面图 PROJECT LAYOUT,咬合樁數量:134 座 (一期孔 67 座, 二期孔67 座) Pile Qty134 Nos. (67 Nos. P.P., 67 Nos. S.P.),35400,16300,咬合樁數量:134 座 (一期孔 67 座
2、, 二期孔67 座) Pile Qty134 Nos. (67 Nos. P.P., 67 Nos. S.P.) 樁徑 Pile Diameter:880mm 樁深 Pile Depth:16m 21m 崁岩深度:一期孔入新鮮岩盤500mm,二期孔入岩1000mm Rock Socket: Primary Pile 500mm into Fresh Rock, S.P. 1000mm into Fresh Rock 咬合長度:130mm (樁心至樁心距離750mm) Over Cut Length:130mm (Center to Center 750mm) 雙層護筒:外徑O.D. 880mm
3、, 內徑I.D. 800mm Double Wall Casing: (17m x 2套, 多一付護筒靴 Plus 1 Spare Casing Starter) 使用鑽頭:鑽土短螺旋鑽 Soil Auger SB 780mm Drilling Tools:崁岩旋挖斗 Rock Bucket KBF-K 780mm 岩芯鑽 Core Barrel KRR 780mm 旋挖钻机: BG 30,MADAMPITIYA SECANT PILE WALL PROJECT 项目概要 PROJECT BRIEFING,MADAMPITIYA SECANT PILE WALL PROJECT 地层状况 SO
4、IL CONDITION,砂质黏土, 黏土质粉土 标贯值 320,堅硬砂质黏土 标贯值 527,非常堅硬砂质黏土 标贯值 1527,完全风化岩盘 推估标贯值 2080,微风化岩盘 推估抗壓強度 3050MPa,新鮮岩盘 推估抗壓強度 5080MPa,區塊 - B,MADAMPITIYA SECANT PILE WALL PROJECT 导墙放样 GUIDE WALL POSITIONING,标准导沟配置 TYPICAL GUIDE WALL ARRANGEMENT,MADAMPITIYA SECANT PILE WALL PROJECT 导墙 GUIDE WALL,导墙钢模 STEEL FOR
5、WORK,MADAMPITIYA SECANT PILE WALL PROJECT 导墙 GUIDE WALL,钢模定位POSITIONING OF FORMWORK 导墙灌浆GUIDE WALL CONCRETING,MADAMPITIYA SECANT PILE WALL PROJECT 导墙 GUIDE WALL,Blinding concrete,钢模拆除FORMWORK DISMANTLE 连续制作导墙GUIDE WALL CONTINUE,MADAMPITIYA SECANT PILE WALL PROJECT 导墙 GUIDE WALL,放置木撑及回填, 旋挖钻可以进场施工 BA
6、CKFILL, READY FOR DRILLING,MADAMPITIYA SECANT PILE WALL PROJECT 导墙 GUIDE WALL,2005年8月6日开工仪式 After site starting ceremony, first casing installation (06, Aug., 2005). Mr. Upali (Nawaloka M. D.) Mr. Alwis (Nawaloka G. M.) Mr. Peter Buhl (AARSLEFF M.D.),MADAMPITIYA SECANT PILE WALL PROJECT 钻掘及现场照片 DRIL
7、LING AND SITE PHOTO,准备护筒连结, 清理螺孔并上黄油 Prepare for casing connection. Clean and grease the connecting screw,上螺栓并锁紧 Tight conical bolts.,MADAMPITIYA SECANT PILE WALL PROJECT 钻掘及现场照片 DRILLING AND SITE PHOTO,护筒连结完成, 旋进时随时以水平尺检测护筒X向及Y向的垂直度 Check casing verticality with sprit level,MADAMPITIYA SECANT PILE
8、WALL PROJECT 钻掘及现场照片 DRILLING AND SITE PHOTO,使用取土短螺旋鑽一直鑽掘到岩盤表面, 最後0.51.0米的崁岩由岩芯鑽搭配崁岩旋挖斗完成. 鑽掘1820m深的樁約耗費3.54.0小時, (包括護筒連接並下護筒的時間) Drill down to the rock surface with soil auger SB only. 0.5m 1.0m rock socketing executed by KRR core barrel + KBF-K rock bucket. Drilling for 1820m deep pile for 3.5 4.0
9、 hours only (include casing connecting).,MADAMPITIYA SECANT PILE WALL PROJECT 钻掘及现场照片 DRILLING AND SITE PHOTO,MADAMPITIYA SECANT PILE WALL PROJECT 崁岩 ROCK SUCKETING,在第一座二期孔H57由岩芯钻KRR取出1米长的岩芯, 微风化岩块估计岩石强度超过50MPa. 1 meter long core taken by KRR at first secondary pile H57. Slightly weathered rock, roc
10、k strength estimated exceed 50MPa.,MADAMPITIYA SECANT PILE WALL PROJECT 浇灌混凝土及护筒拔除 CONCRETING AND CASING WITHDRAWAL,BG 30自行拔除护筒 Casing Withdrawal,特密管灌浆 Concreting with Tremie,MADAMPITIYA SECANT PILE WALL PROJECT 护筒拔除 CASING WITHDRAWAL,由于客户订购的护筒拔除器尚未运抵工地而由BG 30自行拔除护筒, 需要临时性的安全设施避免护筒在拔除的过程中掉落. 32mm的粗钢
11、筋横过护筒螺孔及钢丝绳绑住护筒以挖掘机固定. Without casing extractor or oscillator on site and casing withdrawal by BG 30. The “temporary safety device” have been used to prevent casing fall down. A 32mm diameter cross rebar and wire rope tight the lower casing section.,MADAMPITIYA SECANT PILE WALL PROJECT 施工建议 SUGGESTI
12、ON,钢筋笼尺寸问题, 丹麦大包的设计钢筋笼尺吋为740mm, 为避免拔除护筒时将钢筋笼一起带上造成废桩, 建议增加一组”十”字型钢筋于桩底. 并再灌浆时混凝土面上升高过护筒底面58M时, 先行拔除第一节护筒.,MADAMPITIYA SECANT PILE WALL PROJECT 施工建议 SUGGESTION,桩深仅为1821m, 可将钢筋笼在地面搭接后利用履带吊车配合吊梁一次将钢筋笼吊放到位. 节省再护筒上搭接的时间, 加快施工速度. 吊樑,MADAMPITIYA SECANT PILE WALL PROJECT 施工建议 SUGGESTION,小型的特密管漏斗及特密管直立放置架,MA
13、DAMPITIYA SECANT PILE WALL PROJECT INTERNAL SUGGESTION,Rock strength of some location is significant higher than nearby area, the KRR core barrel has not sufficient ability to penetrate the hard material. The machine shaking / vibrating too much during rock socketing. And the operation noise is anot
14、her negative for BG rig in Colombo city. The roller bit core barrel KRRM could be a good solution for Colombo rock. The progressive auger SBF-P is not suitable for Colombo soil. The soil compacted itself at the pilot area. The soil auger SB with FZ 80 is much better. Although Nawaloka mention they h
15、ave 15 years piling experience, the jobsite arrangement and organization still behind the average. They purchase machine, but do not have suitable person to run the project. The BG operator and project manager / engineer are the most serious, the problem of kelly bar and drilling tools maintenance will coming soon. The new 1800mm pile will be a big challenge to Nawaloka. Customer do not have enough accessories / tools, such like casing, drilling tools, spare partsetc.,