ACI-336.3R-1993-R2006.pdf
《ACI-336.3R-1993-R2006.pdf》由会员分享,可在线阅读,更多相关《ACI-336.3R-1993-R2006.pdf(30页珍藏版)》请在三一文库上搜索。
1、ACI 336.3R-93 supersedes ACI 336.3R-72 (Revised 1985) became effective May 1, 1993. Copyright 1993, American Concrete Institute. All rights reserved including rights of reproduction and use in any form or by any means, including the making of copies by any photo process, or by electronic or mechanic
2、al device, printed, written, or oral, or recording for sound or visual reproduction or for use in any knowledge or retrieval system or device, unless permission in writing is obtained from the copyright proprietors. ACI Committee Reports, Guides, and Commentaries are intended for guidance in plannin
3、g, designing, executing, and inspecting construction. This document is intended for the use of individuals who are competent to evaluate the significance and limitations of its content and recommendations and who will accept responsibility for the application of the material it contains. The America
4、n Concrete Institute disclaims any and all responsibility for the stated principles. The Institute shall not be liable for any loss or damage arising therefrom. Reference to this document shall not be made in contract documents. If items found in this document are desired by the Architect/Engineer t
5、o be a part of the contract documents, they shall be restated in mandatory language for incorporation by the Architect/Engineer. 336.3R-1 Design and Construction of Drilled Piers Reported by ACI Committee 336 ACI 336.3R-93 (Reapproved 2006) Covers the design and construction of foundation piers 30 i
6、n. (760 mm) in diameter or larger made by excavating a hole in the earth and then filling it with concrete. Smaller-diameter piers have been used in noncollapsing soils. The two-step design procedure includes: (1) determination of overall pier size, and (2) detailed design of concrete pier element i
7、tself. Emphasis is on the former, which involves interaction between soil and pier. Construction methods described include excavation, casing, placement of concrete and reinforcing steel, and installation by the slurry displacement method. Criteria for acceptance are presented along with recommended
8、 procedures for inspection and evaluation. Keywords: axial loads; bearing capacity; bending; bending moments; caps (supports); concrete construction; deflection; excavation; foundations; lateral pressure; linings; loads (forces); moments; observation; piers; placing; quality control; reinforced conc
9、rete; slurry displacement method; soil mechanics; structural design; tolerances (mechanics); tremie concrete. CONTENTS Chapter 1General, p. 336.3R-2 1.1Scope 1.2Notation 1.3Limitations 1.4Definitions Chapter 2General considerations, p. 336.3R-5 2.1General 2.2Factors to be considered 2.3Pier types 2.
10、4Geotechnical considerations Chapter 3Design, p. 336.3R-8 3.1Loads 3.2Loading conditions 3.3Strength design of piers 3.4Vertical load capacity 3.5Laterally loaded piers 3.6Piers socketed in rock 3.7Pier configuration Chapter 4Construction methods, p. 336.3R-19 4.1Excavation and casing 4.2Placing rei
11、nforcement 4.3Dewatering, concreting, and removal of casing 4.4Slurry displacement method 4.5Safety Chapter 5Inspection and testing, p. 336.3R-23 5.1Scope 5.2Geotechnical field representative 5.3Preliminary procedures Clyde N. Baker, Jr.M. T. DavissonJim LewisJagdish S. Syal Steven C. BallJohn A. Fo
12、cht, Jr.John F. SeidenstickerEdward J. Ulrich P. V. BanavalkarM. GaynorShyam N. ShuklaSamuel S. White Joseph A. BohinskyWilliam P. HackneyBruce A. SuprenantJohn J. Zils Joseph P. ColacoFritz Kramrisch Hugh S. Lacy Chair 336.3R-2 ACI COMMITTEE REPORT 5.4-Inspection procedures 5.5-Concreting 5.6-Explo
13、ration methods to determine soundness of piers 5.7-Reports 5.8-Criteria for acceptance 5.9-Corrective measures Chapter 6-References, pg. 3363R-29 6.1-Recommended references 6.2-Cited references CHAPTER l-GENERAL 1.1-Scope This report deals with design and construction of drilled pier foundations whi
14、ch are constructed by dig- ging, drilling or otherwise excavating a hole in the earth which is subsequently filled with plain or reinforced concrete. Engineers and constructors have used the terms caissons, foundation piers, bored piles, drilled shafts, sub- piers, and drilled piers interchangeably.
15、 Only the term drilled pier will be used in this report. Structural design and construction of drilled pier foun- dations are the primary objectives of this report. Yet geo- technical considerations are vital because variations in the soil properties have a critical influence on design and construct
16、ion. Therefore, relevant aspects of soil mechan- ics are also discussed herein. For the successful design and construction of the drilled pier foundation, it is necessary that a reliable set of data on the supporting earth be obtained. For this task, combined attention and cooperation of the Geotech
17、nical Engineer, Structural Engineer and constructor is essential because limitations of construction often govern the design. This report is intended primarily for use in building construction, but the sections on construction methods, inspection and testing are equally applicable to bridge and othe
18、r construction. 1.2-Notation Dimensioning method: F=force, L=length, and D= dimensionless. Ab = base area of pier, L2 Ao = surface area of pier shaft, L2 B = foundation width, or width of beam column element 4 Li = soil cohesion, FL-2 = diameter of pier shaft, L db = diameter of bearing area, L dp =
19、 embedded length of pier, L D = net dead loads, F Dg= gross dead load, F 4 = depth of soil overburden, L E%, = pier length, L = modulus of elasticity of concrete, FL-2 Eq e = load effects of earthquake, F = height above ground of horizontal load, L F FS FS1 FS2 H Hg I, Ic Icr Ie Ig ks K1 K2 K R K K
20、Ky L M Mcr Mg Mmax n nh N P p-y pq Pt Pan Pup PULT qa qp Q R R1 = compressive strength of concrete, FL-2 = average side resistance, FL-2 = modulus of rupture of concrete, FL-2 = unit load transfer from shaft to soil at depth Z, FL-2 = vertical load deflection curve at an element of pier, FL-1, L = v
21、ertical load, F = factor of safety, D = Factor of safety for bearing resistance = Factor of safety for side resistance = length of pier above ground surface, L = horizontal shear at ground surface, F = moment of inertia of concrete, L4 = moment of inertia of the transformed cracked section of concre
22、te, L4 = effective moment of inertia, L4 = moment of inertia of gross concrete sec- tion, L4 = modulus of horizontal soil beam reaction, FL-2 = constant, FL-3 = constant, dimension to be selected in each individual case so that the dimensions of ks becomes L-3 = coefficient of rotational restraint,
23、D = moment coefficient, D = soil reaction coefficient, D = passive pressure coefficient, D = deflection coefficient, D = live loads, F = bending moment, FL = cracking moment, FL = moment at ground surface, usually applied to pier by superstructure, FL = maximum bending moment, FL = exponent, D = con
24、stant of horizontal modulus of subgrade reaction, FL-3 = number of blows required in standard pene- tration test to drive a 2 in. (5 cm) sampling spoon 12 in. (30 cm) into the ground, using a 140 lb (64 kg) weight dropping 30 in. (76 cm), D = soil reaction, FL-1 = lateral load deflection curve at an
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- ACI 336.3 1993 R2006
链接地址:https://www.31doc.com/p-3729192.html