用钢管桩和贝雷片做现浇箱梁施工支架施工实践.rar

1.引言
在软弱地基上施工桥梁上部现浇梁、板，一般的施工方法是对软基进行加固处理，
然后搭设满堂支架施工。由于软弱地基特殊的地质条件，地基处理难度较大；同时由于
处理厚度的不均匀性，当填加施工荷载时，地基将可能出现不均匀的沉降，从而可能对
混凝土的质量造成不同程度的损伤，对工程质量留下隐患。且地基处理为一次性投入，
处理费用高，周转利用率低。
随着工程技术的发展，人们在工程实践中摸索出减少或避免处理地基的施工方法，
使支架越发安全可靠。
2.现浇支架比较
尽可能地利用既有墩台基础，以避免或
减少处理地基，根据使用器材的不同， 在实
践中逐步摸索出几种现浇支架模式，可用在
软地基基础上。列举其中的部分结构形式如
下。
2.1 军用墩与军用梁组合现浇支架
支架基本形式见图1。军用梁承载力强，
根据不同跨度在孔间设置支墩，可拼装出不同跨度的支架，但由于为制式器材，在器材
型号不全时，跨度拼装将受到很大限制；军用梁自重大、对支撑墩和基础要求较高。该
支架在青岛流亭立交桥、济青高速公路后刘
立交桥等桥梁现浇梁施工中先后得到应用。
脚手架
方木
六五军用墩
浆砌片石基础
六四军用梁1
图 11. Introduction
Construction of a bridge in the soft ground on top of cast beams, plates, general construction method for reinforcement of soft foundation,
Full Support construction and erection. As the special geological conditions, soft ground, ground handling difficult; same time, because
Handle uneven thickness, plus construction loads when filled, the ground uneven settlement may occur, which may
The quality of concrete caused by different degrees of damage, on the quality of the project to stay hidden. And ground treatment for the one-time investment
High processing costs, low utilization rate of turnover.
With the development of engineering technology, people in engineering practice and explore the foundation to reduce or avoid dealing with the construction method
To support the more secure.
2. Support for Casting Comparison
Use of the existing pier foundation as much as possible to avoid or
Reduce processing foundation, according to the different equipment used in the real
Practice in place and gradually worked out of several support models can be used in
Based on the soft ground. A list of some structure such as
Next.
2.1 The military pier and military support beam cast
Support basic form shown in Figure 1. Military Beam bearing capacity,
Depending on the span between the set buttress holes can be assembled out of different span of support, but as standard equipment, the equipment
Incomplete type, the span will be greatly limited assembly; military Liang significant, based on the support piers and demanding. That
Stent in Qingdao Liuting overpasses, after Liu Qing Expressway
Overpass and other cast girder bridge has been applied.
Scaffold
Fang Mu
June 5 military pier
The basis of mortar and stones
64 Military Beam 1
Figure 1