- 上一篇：工程量清单计价模式下招投标理论与报价策略研究
- 下一篇：苏沪高速公路K138+150-K140+620段初步设计+CAD图纸
摘要预应力混凝土空心板桥是一种常用的桥梁种类，在我国的桥梁方面占有重要的比例，广泛运用于中小跨径的永久性桥梁，包括公路桥梁或者城市桥梁。预应力混凝土空心板桥具有很多优点，例如：就地取材，便于工业化施工，适应力强，整体性好，这些都是空心板桥的优势，因此，本设计也采用预应力混凝土空板桥。50905
本桥跨径：4*15m=60m，主梁、行车道板，桥面部分和支座等组成了上部结构。其中主要承重构件是主梁。桥面部分包括桥面铺装、伸缩装置和栏杆。这些构造虽然不是桥梁的主承重构件，但也与桥梁的安全与功能息息相关。下部结构分别有盖梁、桥墩、支座、灌注桩等，这些共同支撑了整个下部结构。在本设计中，上部结构重点分析了桥梁在施工和使用过程中恒载、活载的作用力。按照新规范公路Ⅱ级安放活载以及配筋计算，还估算了钢绞线的各种应力损失，并进行预应力阶段和使用阶段主梁截面的强度，正应力及主应力的验算。下部结构则采用钻孔灌注桩的墩柱，计算和验算了桥墩和桩基础。
在本设计中通过主梁荷载计算、内力计算、应力钢筋的布置、主梁截面强度与应力验算、行车道板及制作等设计，完整地构造了一座装配式预应力混凝土简支梁桥，通过结构设计配筋，验算设计符合标准，方法符合规范。
毕业论文关键词：预应力，空心板，先张法，钻孔灌注桩
Abstract
Prestressed Concrete Hollow Slab Bridge is a common type of bridges in our country occupies an important proportion of permanent widely used in small and medium-span bridges, including roads and bridges or the city bridge. Prestressed Concrete Hollow Slab has many advantages, such as: local materials, suitable for industrial construction, adaptable, good integrity, these are hollow Itabashi advantage, therefore, the design of prestressed concrete empty Itabashi.
The bridge span: 4 * 15m = 60m, main beam, carriageways board, deck section and the bearings and other components of the superstructure. The main load-bearing component is the main beam. Deck section includes pavement, telescopic device and railings. These structures, although not the primary load-bearing bridge components, but also with the safety and function are closely related to the bridge. Substructure were covered beams, piers, bearings, piles, etc. These common support of the entire substructure. In this design, the upper structure emphatically analyzed and used in the construction of bridges Cheng Zhongheng load, live load force. According to the new norms highway grade Ⅱ put live load and reinforcement calculation, the various strands also estimated loss of stress, and make and use phases prestressed girder cross-section strength, normal stress and principal stress checking. The substructure of the pier bored piles are used, calculation and checking the pier and pile foundation.
In this design, the main beam load calculation, force calculation, stress reinforcement layout, the main beam section strength and stress check, carriageways boards and production, such as design and complete construction of a prefabricated prestressed concrete girder bridge, through structural design reinforcement, checking designed to meet standards, methodologies compliance.
Keywords: prestressed, hollow, pre-tensioned, bored
目录
第一章 绪论 1
1.1 预应力混凝土连续梁桥概述 1
1.2 设计标准 1
1.3河水及水文情况 2
1.4工程地质 2
1.5采用材料 2
1.6设计原则