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A platform for research: civil engineering, architecture and urbanism
Undrained sinking construction method of pipe-jacking open caisson for river regulation under fine sand stratum
The invention discloses an undrained sinking construction method of a pipe-jacking open caisson for river regulation under a fine sand stratum. The method comprises the following steps that S1, soil is taken from the open caisson; S2, an outer drainage pump is placed in the open caisson, and a water pumping pipe communicating with an inner water suction pump outside the open caisson is connected into the open caisson; S3, when the open caisson sinks to the position where the water level in the open caisson is high enough and sinks slowly, the outer drainage pump is started to drain water in the open caisson outwards to assist sinking; S4, the open caisson is regulated and controlled to the designed elevation; and S5, the outer drainage pump is removed, water is injected into the open caisson through the inner water suction pump, the bottom sealing area of the open caisson is emptied, and undrained sinking construction of the pipe-jacking open caisson under the fine sand stratum is completed. According to the undrained sinking construction method of the pipe-jacking open caisson for river regulation under the fine sand stratum, the problems that under the special condition of the fine sand stratum, the construction cost is easily increased, and the sinking speed of the open caisson is delayed can be solved, and under the condition of low investment, open caisson sinking under the special condition is simply and rapidly achieved with high quality.
一种河道治理顶管沉井在细沙地层下的不排水下沉施工方法，所述方法包括以下步骤：步骤1：进行井内取土；步骤2：向井内放置外排水泵以及接入与井外的内抽水泵连通的抽水管；步骤3：当沉井下沉到井内水位足够高，沉井下沉缓慢时，打开外排水泵将井内水外排，辅助下沉；步骤4：将沉井调控至设计标高；步骤5：撤掉外排水泵，利用内抽水泵向沉井内灌水，清空沉井封底区域，即完成顶管沉井在细沙地层下的不排水下沉施工。本发明提供的一种河道治理顶管沉井在细沙地层下的不排水下沉施工方法，可以解决细沙地层的特殊情况下易增加施工成本，延误沉井下沉速率的问题，在低投入的情况下，简单快速和高质量地实现特殊情况下的沉井下沉。
Undrained sinking construction method of pipe-jacking open caisson for river regulation under fine sand stratum
The invention discloses an undrained sinking construction method of a pipe-jacking open caisson for river regulation under a fine sand stratum. The method comprises the following steps that S1, soil is taken from the open caisson; S2, an outer drainage pump is placed in the open caisson, and a water pumping pipe communicating with an inner water suction pump outside the open caisson is connected into the open caisson; S3, when the open caisson sinks to the position where the water level in the open caisson is high enough and sinks slowly, the outer drainage pump is started to drain water in the open caisson outwards to assist sinking; S4, the open caisson is regulated and controlled to the designed elevation; and S5, the outer drainage pump is removed, water is injected into the open caisson through the inner water suction pump, the bottom sealing area of the open caisson is emptied, and undrained sinking construction of the pipe-jacking open caisson under the fine sand stratum is completed. According to the undrained sinking construction method of the pipe-jacking open caisson for river regulation under the fine sand stratum, the problems that under the special condition of the fine sand stratum, the construction cost is easily increased, and the sinking speed of the open caisson is delayed can be solved, and under the condition of low investment, open caisson sinking under the special condition is simply and rapidly achieved with high quality.
一种河道治理顶管沉井在细沙地层下的不排水下沉施工方法，所述方法包括以下步骤：步骤1：进行井内取土；步骤2：向井内放置外排水泵以及接入与井外的内抽水泵连通的抽水管；步骤3：当沉井下沉到井内水位足够高，沉井下沉缓慢时，打开外排水泵将井内水外排，辅助下沉；步骤4：将沉井调控至设计标高；步骤5：撤掉外排水泵，利用内抽水泵向沉井内灌水，清空沉井封底区域，即完成顶管沉井在细沙地层下的不排水下沉施工。本发明提供的一种河道治理顶管沉井在细沙地层下的不排水下沉施工方法，可以解决细沙地层的特殊情况下易增加施工成本，延误沉井下沉速率的问题，在低投入的情况下，简单快速和高质量地实现特殊情况下的沉井下沉。
Undrained sinking construction method of pipe-jacking open caisson for river regulation under fine sand stratum
一种河道治理顶管沉井在细沙地层下的不排水下沉施工方法
ZHU XUERUI (author) / XIONG ZHIQIANG (author) / ZHANG YANJUN (author) / LI TIANJIAN (author) / CHEN ZHAOWEI (author) / DAI XING (author) / OUYANG XIAOPING (author) / LIU JIE (author) / WANG LIUYANG (author) / TONG HANG (author)
2020-07-03
Patent
Electronic Resource
Chinese
IPC:
E02D
FOUNDATIONS
,
Gründungen
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