A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Continuous beam tensioning method
The invention discloses a continuous beam tensioning method which comprises the following steps: arranging a corrugated pipe to form a prestressed duct; penetrating a steel bundle into the corrugated pipe; prestress is applied to the steel beams, and the steel beams are tensioned and anchored; cutting redundant steel strands in the steel bundle; reducing the pore friction coefficient to control the pore friction loss; the distance between the anchor ring and the limiting plate is reduced to control the retraction loss of the anchorage device; the tensioning sequence is adjusted to control the concrete compression loss; and full cement paste is poured into the prestressed duct in time to control relaxation loss. By reducing the friction resistance coefficient of the hole channel, reducing the distance between the anchor ring and the limiting plate and adjusting the tensioning sequence of the steel beam, the technical problem that in the prior art, hole channel friction resistance loss, anchorage device retraction loss, concrete compression loss and relaxation loss cannot be effectively handled, and consequently prestress loss is caused is solved.
本发明公开一种连续梁张拉方法，包括以下步骤：布置波纹管，形成预应力孔道；向波纹管内穿入钢束；对钢束施加预应力，张拉钢束并锚固钢束；切割钢束中多余的钢绞线；降低孔道摩阻系数以控制孔道摩阻损失；减小锚环与限位板之间的间距以控制锚具回缩损失；调整张拉顺序以控制砼压缩损失；向预应力孔道内及时灌注饱满的水泥浆以控制松弛损失。本发明通过降低孔道摩阻系数、减小锚环与限位板之间的间距和调整钢束的张拉顺序，解决了现有技术中无法有效的应对孔道摩阻损失、锚具回缩损失、砼压缩损失和松弛损失而造成预应力损失的技术问题。
Continuous beam tensioning method
The invention discloses a continuous beam tensioning method which comprises the following steps: arranging a corrugated pipe to form a prestressed duct; penetrating a steel bundle into the corrugated pipe; prestress is applied to the steel beams, and the steel beams are tensioned and anchored; cutting redundant steel strands in the steel bundle; reducing the pore friction coefficient to control the pore friction loss; the distance between the anchor ring and the limiting plate is reduced to control the retraction loss of the anchorage device; the tensioning sequence is adjusted to control the concrete compression loss; and full cement paste is poured into the prestressed duct in time to control relaxation loss. By reducing the friction resistance coefficient of the hole channel, reducing the distance between the anchor ring and the limiting plate and adjusting the tensioning sequence of the steel beam, the technical problem that in the prior art, hole channel friction resistance loss, anchorage device retraction loss, concrete compression loss and relaxation loss cannot be effectively handled, and consequently prestress loss is caused is solved.
本发明公开一种连续梁张拉方法，包括以下步骤：布置波纹管，形成预应力孔道；向波纹管内穿入钢束；对钢束施加预应力，张拉钢束并锚固钢束；切割钢束中多余的钢绞线；降低孔道摩阻系数以控制孔道摩阻损失；减小锚环与限位板之间的间距以控制锚具回缩损失；调整张拉顺序以控制砼压缩损失；向预应力孔道内及时灌注饱满的水泥浆以控制松弛损失。本发明通过降低孔道摩阻系数、减小锚环与限位板之间的间距和调整钢束的张拉顺序，解决了现有技术中无法有效的应对孔道摩阻损失、锚具回缩损失、砼压缩损失和松弛损失而造成预应力损失的技术问题。
Continuous beam tensioning method
连续梁张拉方法
WANG CUNBAO (author) / XIE JIANGSHENG (author) / ZHONG WEILING (author) / WANG BOXIAN (author) / YANG YONG (author) / FAN QINGCHUN (author)
2022-05-06
Patent
Electronic Resource
Chinese
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