Grouting of offshore structures
阅读：578发布：2021-11-06
专利汇可以提供Grouting of offshore structures专利检索，专利查询，专利分析的服务。并且A method for grouting the annulus between the jacket and piling in the legs of an offshore structure in which air is introduced to expel water from the lower end of the annulus, and grouting material is pumped into the annulus at the bottom, displacing air upwardly. When sufficient grouting material is introduced to balance the hydrostatic head of the sea water, the grouting is allowed to set up. Additional grouting material may then be introduced from the top.，下面是Grouting of offshore structures专利的具体信息内容。
1. A method of grouting an offshore structure having at least one supporting leg including a tubular jacket extending downwardly from above the waterline into the sea bed and a piling driven through said jacket deeper into the sea bed with an annular space existing between the inside of the jacket and said piling; said method comprising the steps of sealing the upper end of said jacket to said piling so as to close said annular space at the upper end of the jacket; introducing compressed air into said annular space under sufficient pressure to expel substantially all of the water from said space through the lower end of the jacket; introducing fluid grouting material into said annular space at a point adjacent the lower end of the jacket after the water has been expelled from said space as aforesaid; simultaneously with the introduction of said grouting material gradually releasing the air pressure in said annular space at a rate which will maintain a pressure sufficient to prevent ingress of water through the lower end of said jacket but insufficient to force a substantial proportion of the grouting material out of the lower end of the jacket, whereby the level of the grouting will rise in the annular space, displacing air upwardly; stopping the introduction of grouting material when the air pressure is reduced to substantially atmospheric pressure, permitting the grouting material to set, introducing additional grouting material into said annular space at a point adjacent the upper end of the jacket, and permitting the additional grouting material to set.
1. A method of grouting an offshore structure having at least one supporting leg including a tubular jacket extending downwardly from above the waterline into the sea bed and a piling driven through said jacket deeper into the sea bed with an annular space existing between the inside of the jacket and said piling; said method comprising the steps of sealing the upper end of said jacket to said piling so as to close said annular space at the upper end of the jacket; introducing compressed air into said annular space under sufficient pressure to expel substantially all of the water from said space through the lower end of the jacket; introducing fluid grouting material into said annular space at a point adjacent the lower end of the jacket after the water has been expelled from said space as aforesaid; simultaneously with the introduction of said grouting material gradually releasing the air pressure in said annular space at a rate which will maintain a pressure sufficient to prevent ingress of water through the lower end of said jacket but insufficient to force a substantial proportion of the grouting material out of the lower end of the jacket, whereby the level of the grouting will rise in the annular space, displacing air upwardly; stopping the introduction of grouting material when the air pressure is reduced to substantially atmospheric pressure, permitting the grouting material to set, introducing additional grouting material into said annular space at a point adjacent the upper end of the jacket, and permitting the additional grouting material to set.
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