A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Unbonded prestressed concrete structure beam plate punching method
The invention discloses an unbonded prestressed concrete structure beam plate punching method. The unbonded prestressed concrete structure beam plate punching method comprises the following steps that(1), concrete is manually chiseled, prestressed tendons are found out, and a prestressed steel support reverse top is arranged adjacent to a span; (2), an open anchorage device matched with the prestressed tendons is installed; (3), the prestressed tendons at the two ends in the same hole are sequentially cut off; and (4), the concrete at the punching position is disassembled. According to the unbonded prestressed concrete structure beam plate punching method, the unbonded prestressed concrete structure is punched through the method that anchoring is carried out before breaking and a prestressed steel support is additionally arranged, elastic retraction of steel strands can be effectively avoided when the prestressed tendons are cut off, and adverse effects on a reserved structure are prevented.
本发明公开了一种无粘结预应力混凝土结构梁板开洞方法，包括以下步骤：1）人工剔凿混凝土，找出预应力筋，邻跨设置预应力钢支撑反顶；2）安装与预应力筋相适配的开口锚具；3）依次切断同一孔洞内两端的预应力筋；4）拆除开洞位置混凝土。本发明通过“先锚后断、外加预应力钢支撑”的方法对无粘结预应力混凝土结构开洞，该方法可有效避免在截断预应力筋时钢绞线的弹性回缩，防止对保留结构造成不利影响。
Unbonded prestressed concrete structure beam plate punching method
The invention discloses an unbonded prestressed concrete structure beam plate punching method. The unbonded prestressed concrete structure beam plate punching method comprises the following steps that(1), concrete is manually chiseled, prestressed tendons are found out, and a prestressed steel support reverse top is arranged adjacent to a span; (2), an open anchorage device matched with the prestressed tendons is installed; (3), the prestressed tendons at the two ends in the same hole are sequentially cut off; and (4), the concrete at the punching position is disassembled. According to the unbonded prestressed concrete structure beam plate punching method, the unbonded prestressed concrete structure is punched through the method that anchoring is carried out before breaking and a prestressed steel support is additionally arranged, elastic retraction of steel strands can be effectively avoided when the prestressed tendons are cut off, and adverse effects on a reserved structure are prevented.
本发明公开了一种无粘结预应力混凝土结构梁板开洞方法，包括以下步骤：1）人工剔凿混凝土，找出预应力筋，邻跨设置预应力钢支撑反顶；2）安装与预应力筋相适配的开口锚具；3）依次切断同一孔洞内两端的预应力筋；4）拆除开洞位置混凝土。本发明通过“先锚后断、外加预应力钢支撑”的方法对无粘结预应力混凝土结构开洞，该方法可有效避免在截断预应力筋时钢绞线的弹性回缩，防止对保留结构造成不利影响。
Unbonded prestressed concrete structure beam plate punching method
一种无粘结预应力混凝土结构梁板开洞方法
ZHANG LINBO (author) / WANG QINGZHONG (author)
2021-02-12
Patent
Electronic Resource
Chinese
IPC:
E04G
SCAFFOLDING
,
Baugerüste
Calculation Method of Ultimate Punching Bearing Capacity of Unbonded Prestressed Concrete Slab
| Trans Tech Publications | 2015
Calculation Method of Ultimate Punching Bearing Capacity of Unbonded Prestressed Concrete Slab
| British Library Conference Proceedings | 2015
Seismic research on unbonded partially prestressed concrete flat-beam frame structure
| British Library Online Contents | 2003
Post-tensioned unbonded prestressed beam dismantling method
| European Patent Office | 2024