Method for preventing differential settlement in settlement area and fan foundation structure thereof

Abstract

The invention discloses a method for preventing differential settlement in a settlement area and a fan foundation structure thereof. The fan foundation structure comprises a foundation pit, a compaction foundation, a jacking reserved groove, a deviation rectifying square box, a cushion layer, a fan foundation and a high-pressure grouting hose. The method comprises the following steps: fan foundation pit excavation, deviation rectifying square box construction, cushion layer pouring, fan foundation steel bar binding, high-pressure grouting hose paving, fan foundation pouring and fan foundation deviation rectifying. The fan foundation structure is reasonable in structure, safe, reliable and capable of being automatically controlled and recycled to eliminate differential settlement of the fan foundation, so that normal operation of a fan unit is guaranteed; when differential settlement of the fan foundation occurs, the size value of the peripheral settlement angle of the connecting cushion layer of the foundation pit is measured in real time through the settlement sensor and fed back to the upper computer to be compared. If the value exceeds the standard, the jacking mechanism can be used for allocation, and the high-pressure grouting mechanism is used for grouting, so that the normal operation of the fan unit is ensured.

Description

Technical field [0001] The present invention relates to the technical field of wind power base, in particular to a method of preventing uneven settlement subsidence and the wind turbine foundation structure. Background technique [0002] In the process of coal mining, underground mining of coal resources need to be transported away, usually in the excavation process, using a similar road through the mountain tunnel on the way to gradually open up the location of underground coal mine tunnel between the wellhead, the process will encounter general mining to the ore, coal transported to the ground, in order to form a reasonable shipping and surface mining operations, coal and other minerals as continuously out of the underground formation of such coal goaf. Under pressure after the coal layer is taken out, the empty mining roof strata in the local area and its own weight on the caprock, a downward movement and bending, resulting in ground subsidence, ground deformation. According t...

AI Technical Summary

Problems solved by technology

Due to the non-directional nature of the wind, the wind load on the fan is always in a reciprocating state. The goaf at the bottom of the fan foundation and the gob itself have the particularity of possible residual deformation and activation deformation, which makes the fan such a Taller structures are much more likely to experience uneven settlement under cyclic loading

And the fan is extremely sensitive to the inclination, when there is an inclination, it is very easy to cause the failure of the fan

For this reason, some wind turbine leveling devices have been developed. For example, the Chinese patent application number 201910169705.9 discloses a leveling device for adjusting the differential settlement of the wind turbine foundation during operation. Leveling device, the leveling device includes the reaction force foundation, the through reserved hole set on the edge of the fan foundation, the embedded high-strength bolts in the fan foundation, the pre-buried grouting pipe in the fan foundation, the reaction steel plate, the support column, and the jack , the grouting pipe of the leveling device is at the lifting position, the grouting effect is poor, and the problem of uneven grouting is prone to occur. At the same time, the application adopts the lifting method, and the jacking equipment rises together with the structure, and the structure of the lifting position is complicated. It is necessary to reserve a hole in the foundation of the fan to place the support column, and the jack is placed on the support column, which is transmitted to the bottom of the foundation through the reaction force steel plate and the fixed screw rod, resulting in complicated construction steps and high requirements for the construction technology of the raised place. The present invention solves the above problems , a method to prevent uneven subsidence in the subsidence area and its fan foundation structure

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