Sinking construction method of sinking well with geology of gravel and pebble beds under saturated water condition
A pebble layer and caisson technology, applied in caisson, infrastructure engineering, construction and other directions, can solve the problems of low construction efficiency, large impact, and unfavorable caisson correction, and achieve the effects of low cost, flexible and convenient use, and high efficiency.
Active Publication Date: 2011-06-15
CHINA 22MCC GROUP CORP
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Problems solved by technology
The long-arm grab is greatly affected by the sinking of the caisson. During the construction process, according to the sinking of the caisson, the equipment needs to move continuously to meet the uniform and stable sinking of the caisson. There must be enough space around the caisson, and the grab operation is not easy. Flexibility is not good for caisson correction, the excavation volume is generally 1 / 5-2 / 5 of the grab bucket volume, and the construction efficiency is low
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[0016] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.
[0017] like figure 1 , figure 2 Shown, under the saturated water condition of the present invention, geology is the caisson sinking construction method of sandstone, pebble layer, and concrete operation steps are as follows:
[0018] 1. The sand dredger 3 is hoisted into the caisson 1, and at the same time, two cranes 2 are used on the outside of the caisson 1 to coordinate construction;
[0019] 2. Adjust the position of the sand dredger 3, and fix the hull positioning rope 4 on the pulling bolt rod on the pool wall;
[0020] 3. Operate the bucket to control the track 5, so that the anchor rod at the front end of the track is anchored into the lower earthwork excavation 6 at the center of the caisson 1;
[0021] 4. Start the sand dredging equipment, and adjust the front positioning rope 4 again to ensure that the position of the sand dredger 3 do...
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The invention relates to a sinking construction method of a sinking well, in particular to a sinking construction method of a sinking well with the geology of gravel and pebble beds under the saturated water condition. The method comprises the following steps of: carrying out the excavation on the lower part at the center of a sinking well structure by adopting a sand dredger when the sinking well structure sinks to the saturated water condition and reaches the geology of gravel and pebble beds, gradually excavating towards the periphery according to the sinking situation of the sinking well,and meanwhile, lifting earth out by the matching of two cranes at the outer side of the sinking well. The sand dredger moves clockwise in the construction process to adjust the excavation position, thereby ensuring the interior symmetry and even excavation of the sinking well so as to damage the inner frication angle of the gravel bed and ensure that the tough angle evenly sinks towards the center and the sinking well sinks by self weight. The invention has the advantages that: the sand dredger is more flexible and convenient to use, has high efficiency and low cost under the saturated water conduction and in the existence of the gravel and pebble beds; and the method can be used in structural construction under similar geological conditions.
Description
technical field [0001] The invention relates to a construction method for sinking a caisson, in particular to a construction method for sinking a caisson whose geology is sandstone and pebble layers under saturated water conditions. Background technique [0002] At present, caissons are sunk under saturated water conditions and the geological conditions are sandstone and pebble layers, and long-arm grabs or hydraulic grabs are often used for construction. The long-arm grab is greatly affected by the sinking of the caisson. During the construction process, according to the sinking of the caisson, the equipment needs to move continuously to meet the uniform and stable sinking of the caisson. There must be enough space around the caisson, and the grab operation is not easy. Flexibility is not good for caisson correction, the excavation volume is generally 1 / 5-2 / 5 of the grab bucket volume, and the construction efficiency is low. Contents of the invention [0003] The purpose...
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IPC IPC(8): E02D23/08
Inventor 董树林李永刚关胜玉李伟杜洪彪李佳
Owner CHINA 22MCC GROUP CORP