CN2575400Y - 无粘结预应力混凝土压力管 - Google Patents
无粘结预应力混凝土压力管 Download PDFInfo
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- CN2575400Y CN2575400Y CN 01211569 CN01211569U CN2575400Y CN 2575400 Y CN2575400 Y CN 2575400Y CN 01211569 CN01211569 CN 01211569 CN 01211569 U CN01211569 U CN 01211569U CN 2575400 Y CN2575400 Y CN 2575400Y
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- 239000011513 prestressed concrete Substances 0.000 claims abstract description 11
- 239000004567 concrete Substances 0.000 claims abstract description 7
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 6
- 239000010959 steel Substances 0.000 claims abstract description 6
- 210000003205 muscle Anatomy 0.000 claims description 4
- 230000002787 reinforcement Effects 0.000 claims description 4
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- 238000009434 installation Methods 0.000 abstract description 4
- 230000007797 corrosion Effects 0.000 abstract description 2
- 238000005260 corrosion Methods 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 2
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000004873 anchoring Methods 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
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Abstract
本实用新型涉及对一种输水用预应力混凝土压力管的改进。由内、外环筋，内、外纵筋和S型拉筋组成的无粘结预应力混凝上压力管，沿圆形普通钢筋骨架的外层钢筋上，设有分段，等距的无粘结预应力筋缠绕，预应力筋端头采用锚具固定在长方形锚槽内，相邻的两锚槽，对称设置在混凝土压力管本体外壁上。该管不易被腐蚀：无方向性，安装方便：无粘结预应力筋端头采用环锚，减少了锚具数量，减低了成本。
Description
本实用新型涉及对一种输水用预应力混凝土压力管的改进。
已见中国专利00205783.2无粘结预应力混凝土压力管中，无粘结预应力筋是设在内外层钢筋骨架之间，呈椭圆形布置，管体垂直比水平处预应力筋多25％，使混凝土管体承受不均匀压应力，安装时有一定的方向性，给安装工作增加了难度：预应力筋端头采用单锚，锚固点多，锚具多。
本实用新型的目的在于提供一种无粘结预应力混凝土压力管，具有抗蚀能力强锚具少，节约材料，制作简单的特点。
结合附图1、2本实用新型是这样实现的。由内、外环筋6、4，内、外纵筋5、3和S型拉筋1组成的无粘结预应力混凝土压力管，沿圈形普通钢筋骨架的外层钢筋上，设有分段，等距的无粘结预应力筋2缠绕，预应力筋端头采用锚具8固定在长方形锚槽7内，相邻的两锚槽对称设置在混凝土压力管本体外壁上，纵向距离为四分之一管周长。
图3给出了无粘结预应力筋端头采用环锚固定方式，四根预应力筋端头固定在一套锚具中。
按照上述结构制成的无粘结预应力混凝土压力管，由于无粘结预应力筋埋在管壁混凝土内，不与空气接触，不易被腐蚀：无粘结预应力筋紧紧环绕在钢骨架上，通过钢骨架将预应力筋张拉后的张拉力均匀传递在混凝土管壁上，减少了因受力不均而出现的环裂：该管无方向性，安装方便：采用双卡式液压张拉器，可将两根无粘结预应力筋一起张拉，不但使锚具受力平衡，而且提高效率。无粘结预应力筋端头采用环锚，较单锚可减少张拉力损失，单锚每个端头一套锚具，环锚四个端头在一套锚具中，相应减少了锚具数量，减低了成本。
附图说明：
图1 无粘结预应力混凝上压力管结构示意图
图2 图1的俯视图
图3 无粘结预应力筋端头环锚固定结构放大示意图
实施例：1、按照附图所示结构，以管内径4800mm，外径5440mm管壁厚320mm，设计压力0.3MPa的无粘结预应力混凝土压力管为例，其主要技术参数设计如下：
每根管长3000mm，无粘结预应力筋采用直径15mm，标准强度为1360MPa钢铰线，每米管长配8根，设四组，每组两根预应力筋各环绕外层钢筋两圈，用一套锚具固定，其各组间距为250mm，张拉力210KN。
按照上述结构和参数制得的无粘结预应力混凝土压力管，可适用于工作压力在0.2MPa，管顶覆土2000mm普通砂石基础的环境。该管不易被腐蚀：无方向性安装方便：无粘结预应力筋端头采用环锚，较单锚锚具减少50％，张拉工效提高一倍。
Claims (2)
1、一种由内、外环筋6、4，内、外纵筋5、3和S型拉筋1组成的无粘结预应力混凝土压力管，其特征是沿圆形普通钢筋骨架的外层钢筋上，设有分段，等距的无粘结预应力筋2缠绕，预应力筋端头采用锚具8固定在长方形锚槽7内，相邻的两锚槽对称设置在混凝土压力管本体外壁上，纵向距离为四分之一管周长。
2、按照权利要求1所说的无粘结预应力混凝土压力管，其特征是无粘结预应力筋端头采用环锚，四根预应力筋端头固定在一套锚具中。
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| Application Number | Priority Date | Filing Date | Title |
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| CN 01211569 CN2575400Y (zh) | 2001-02-07 | 2001-02-07 | 无粘结预应力混凝土压力管 |
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| CN 01211569 CN2575400Y (zh) | 2001-02-07 | 2001-02-07 | 无粘结预应力混凝土压力管 |
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| CN 01211569 Expired - Fee Related CN2575400Y (zh) | 2001-02-07 | 2001-02-07 | 无粘结预应力混凝土压力管 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100417856C (zh) * | 2005-03-25 | 2008-09-10 | 衡水长江预应力有限公司 | 小截面环心应力抗压涵管及其制备工艺 |
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- 2001-02-07 CN CN 01211569 patent/CN2575400Y/zh not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100417856C (zh) * | 2005-03-25 | 2008-09-10 | 衡水长江预应力有限公司 | 小截面环心应力抗压涵管及其制备工艺 |
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