Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Construction method and structure for enlarging overflowing section below existing bridge
The invention discloses a construction method and a structure for enlarging an overflowing section below an existing bridge, and the method comprises the following steps: S1, calculating a rubbed overflowing section under the condition that a top water level is not changed according to an arrangement principle in retaining wall technical requirements; s2, a riverbed between the piers is excavated to the designed elevation; s3, according to the change of the water level of a river channel below the existing bridge, construction is conducted at the low water level after a riverbed is exposed, or dry land construction is conducted after the periphery of a pier is sealed through an earth rock cofferdam; s4, the stratum around the pier bearing platform is excavated, after excavation is conducted to the designed elevation, stratum reinforcement is conducted according to the situation of the lower stratum when necessary, and a retaining wall is poured; s5, after the retaining wall structure meets the design requirement, backfilling is conducted; and S6, the earth rock cofferdam is dismantled, and riverway water Under the condition that the bearing capacity of the pile foundation on the lower portion of the existing bridge is not affected, the stratum below the portion between the piers is excavated out so as to enlarge the area between the piers, and therefore the river channel overflowing section is enlarged.
本发明公开了一种加大既有桥梁下方过流断面的施工方法及其结构，该方法包括如下步骤：S1:按照挡墙技术要求中的布置原则，在顶部水位线不变的情况下计算拓深后的过流断面；S2:将各个桥墩之间的河床开挖至设计高程；S3:根据既有桥梁下方河道的水位变化，选择在河床露出后的枯水位施工，或者在桥墩四周采用土石围堰封闭后进行干地施工；S4:开挖桥墩承台周边的地层，开挖至设计标高后，根据下部地层情况必要时进行地层加固，浇筑挡墙；S5:待挡墙结构达到设计要求后进行回填；S6:拆除土石围堰，恢复河道输水。本发明可在不影响既有桥梁下部桩基承载力的情况下，将桥墩之间下方的地层挖除，以扩大桥墩之间的面积，从而加大河道过流断面。
Construction method and structure for enlarging overflowing section below existing bridge
The invention discloses a construction method and a structure for enlarging an overflowing section below an existing bridge, and the method comprises the following steps: S1, calculating a rubbed overflowing section under the condition that a top water level is not changed according to an arrangement principle in retaining wall technical requirements; s2, a riverbed between the piers is excavated to the designed elevation; s3, according to the change of the water level of a river channel below the existing bridge, construction is conducted at the low water level after a riverbed is exposed, or dry land construction is conducted after the periphery of a pier is sealed through an earth rock cofferdam; s4, the stratum around the pier bearing platform is excavated, after excavation is conducted to the designed elevation, stratum reinforcement is conducted according to the situation of the lower stratum when necessary, and a retaining wall is poured; s5, after the retaining wall structure meets the design requirement, backfilling is conducted; and S6, the earth rock cofferdam is dismantled, and riverway water Under the condition that the bearing capacity of the pile foundation on the lower portion of the existing bridge is not affected, the stratum below the portion between the piers is excavated out so as to enlarge the area between the piers, and therefore the river channel overflowing section is enlarged.
本发明公开了一种加大既有桥梁下方过流断面的施工方法及其结构，该方法包括如下步骤：S1:按照挡墙技术要求中的布置原则，在顶部水位线不变的情况下计算拓深后的过流断面；S2:将各个桥墩之间的河床开挖至设计高程；S3:根据既有桥梁下方河道的水位变化，选择在河床露出后的枯水位施工，或者在桥墩四周采用土石围堰封闭后进行干地施工；S4:开挖桥墩承台周边的地层，开挖至设计标高后，根据下部地层情况必要时进行地层加固，浇筑挡墙；S5:待挡墙结构达到设计要求后进行回填；S6:拆除土石围堰，恢复河道输水。本发明可在不影响既有桥梁下部桩基承载力的情况下，将桥墩之间下方的地层挖除，以扩大桥墩之间的面积，从而加大河道过流断面。
Construction method and structure for enlarging overflowing section below existing bridge
一种加大既有桥梁下方过流断面的施工方法及其结构
ZHU MIN (Autor:in) / ZHANG TIEJUN (Autor:in) / WANG ZIHAO (Autor:in) / WU MING (Autor:in)
05.04.2024
Patent
Elektronische Ressource
Chinesisch
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