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Grouting method for strong weathered geological section
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A strong weathering and grouting technology, used in construction, infrastructure engineering and other directions, can solve problems such as difficulty and difficulty in achieving water-stopping effect, and achieve the effect of improving water-stopping effect.
Inactive Publication Date: 2021-04-30
CCCC FIRST HARBOR ENG +1
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Summary
Abstract
Description
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Application Information
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Problems solved by technology
At present, due to the complex engineering geology and the deep weathered geology, it is difficult to stop water only by curtain grouting. Therefore, it is necessary to use occlusal piles in the strongly weathered position to achieve a good water stop effect. Even if the traditional grouting method cooperates with the occlusal pile in the strong weathered position, it is still difficult to achieve a good water-stop effect
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Effect test
Embodiment 1
[0024] A grouting method for strongly weathered geological sections, the specific steps are as follows:
[0026] A steel casing is placed outside the drill bit of the drilling rig to form a drilling assembly, and the drilling rig is started to drill the drilling assembly from the soil layer into the strongly weathered fractured zone, and drill to the designed depth of the grouting hole at one time;
[0027] Step 2: Lower the grouting pipe,
[0028] After the drilling is completed, take out the drill bit from the steel casing, and lower the steel grouting pipe along the steel casing to the design depth of the grouting hole;
[0029] Step 3: cyclic grouting construction,
[0030] After pulling out the steel casing for a certain distance, grout the strongly weathered geological area corresponding to the drawn length through the grouting pipe. Grouting is carried out in the strongly weathered geological area corresponding to the length, and this...
Embodiment 2
[0041] A grouting method for strongly weathered geological sections, the specific steps are as follows:
[0043] A steel casing is placed outside the drill bit of the drilling rig to form a drilling assembly, and the drilling rig is started to drill the drilling assembly from the soil layer into the strongly weathered fractured zone, and drill to the designed depth of the grouting hole at one time;
[0044] Step 2: Lower the grouting pipe,
[0045] After the drilling is completed, take out the drill bit from the steel casing, and lower the steel grouting pipe along the steel casing to the design depth of the grouting hole;
[0046] Step 3: cyclic grouting construction,
[0047] After pulling out the steel casing for a certain distance, grout the strongly weathered geological area corresponding to the drawn length through the grouting pipe. Grouting is carried out in the strongly weathered geological area corresponding to the length, and this...
Embodiment 3
[0058] A grouting method for strongly weathered geological sections, the specific steps are as follows:
[0060] A steel casing is placed outside the drill bit of the drilling rig to form a drilling assembly, and the drilling rig is started to drill the drilling assembly from the soil layer into the strongly weathered fractured zone, and drill to the designed depth of the grouting hole at one time;
[0061] Step 2: Lower the grouting pipe,
[0062] After the drilling is completed, take out the drill bit from the steel casing, and lower the steel grouting pipe along the steel casing to the design depth of the grouting hole;
[0063] Step 3: cyclic grouting construction,
[0064]After pulling out the steel casing for a certain distance, grout the strongly weathered geological area corresponding to the drawn length through the grouting pipe. Grouting is carried out in the strongly weathered geological area corresponding to the length, and this ...
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Abstract
The invention provides a grouting method for a strong weathered geological section. The grouting method comprises the following specific steps that 1, a drill bit of a drilling machine is sleeved with a steel sleeve to form a drilling assembly, the drilling assembly is made to drill into a strong weathered crushed zone from a soil layer, and drilling is conducted at a time till the designed depth of a grouting hole is reached; 2, after drilling is completed, the drill bit is taken out of the steel sleeve, and a steel grouting pipe is put down along the steel sleeve till the designed depth of the grouting hole is reached; and 3, after the steel sleeve is pulled out by a certain distance, grouting is conducted on the strong weathered geological section corresponding to the pulling-out length through the grouting pipe, after grouting is completed, the grouting pipe and the steel sleeve are pulled out by a certain distance, grouting is conducted on the strong weathered geological section corresponding to the pulling-out length through the grouting pipe again, and the steps are repeated till grouting of all current grouting holes is completed. According to the grouting method for the strong weathered geological section, the situation that the grouting pipe is difficult to pull out due to the fact that the hole collapse range is too long is effectively avoided in the mode that the steel sleeve and the grouting pipe are alternately lifted; and the water stopping effect of a curtain is improved by accurately controlling the grouting pressure of different depths.
Description
technical field [0001] The invention relates to the technical field of building construction, in particular to a grouting method for strongly weathered geological sections. Background technique [0002] During the construction process of the dock of the water transportation project, due to the special requirements of use, it needs to be built near the sea. In order to meet the dry land operation conditions in the dock, it is necessary to carry out water-stop treatment around the deep foundation pit of the dock, and then carry out the construction in the dock. At present, due to the complex engineering geology and the deep weathered geology, it is difficult to stop water only by curtain grouting. Therefore, it is necessary to use occlusal piles in the strongly weathered position to achieve a good water stop effect. Even if the traditional grouting method cooperates with the occlusal pile in the strong weathering position, it is still difficult to achieve a good water-stop eff...
Claims
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Application Information
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