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Draught fan foundation strengthening method

A fan foundation and foundation ring technology, which is applied in foundation structure engineering, foundation structure repair, construction, etc., can solve the problems of epoxy mortar curing time and long maintenance period, economic loss of fan shutdown, cumbersome connection and coordination, etc., and achieve reduction The effects of on-site downtime, shortened construction period, and short curing time

Active Publication Date: 2018-09-04
POWERCHINA HUADONG ENG COPORATION LTD
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Problems solved by technology

The former requires dismantling and hoisting of the wind turbine tower. The project cost is high, the connection between the processes is cumbersome, and it is easily affected by the external weather environment, resulting in a long construction period; the grouting material used in the latter will react with water. It is necessary to dry the moisture inside the foundation before grouting, and the curing time and maintenance period of epoxy mortar are long, which will cause considerable economic losses due to the shutdown of the fan during the foundation maintenance period

Method used

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Embodiment Construction

[0027] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

[0028] Such as Figure 1~Figure 3 As shown, the method for strengthening the foundation of the fan first needs to arrange the holes. As a preferred solution, in this embodiment, 10 holes 12 are evenly arranged in a quincunx circular direction at 100mm positions inside and outside the base ring 8, using drilling holes. Machine drill to the bottom surface of the base ring bottom flange 9 at 100mm with a diameter of 32mm.

[0029] After the drilling channel 7 is formed, the fine particles in the hole and the surrounding space are washed clean. The washing process is first washed with a large flow of high-pressure water flow, the washing pressure is 1MPa, the flow rate is greater than 60L / min, until the return water becomes clear; then switch to pulsation The flushing mode continues flushing for 30 minutes. Drilling and flushing has a greater impact on t...

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Abstract

The invention provides a draught fan foundation strengthening method. The draught fan foundation strengthening method comprises the following steps that firstly, a plurality of grouting hole positionsare formed in the inner side and the outer side of a draught fan foundation ring at certain interval positions, a drilling machine is adopted for drilling the position below the lower bottom face ofa foundation ring bottom flange, and the drilling hole diameter meets the grouting slurry diameter requirement; secondly, drilling hole way cleaning is conducted; and thirdly, a high polymer materialA and a high polymer material B are prepared into high polymer polyurethane slurry according to the ratio to conduct high-pressure chemical grouting filling on a drilling hole way, the material A andthe material B are conveyed to the fracture plane gap position through the high pressure till fissure gaps are fully filled, the materials become solids from liquid after the chemical reaction, the size is slightly expanded, and the purposes of filling cavities and the gaps and extruding and discharging gap water are achieved. According to the draught fan foundation strengthening method, the project manufacturing cost is low, the construction period is short, strength is high, curing is fast, the construction effect is reliable, and rapid repairing and strengthening of the draught fan foundation can be achieved.

Description

Technical field [0001] The invention belongs to the technical field of fan foundation treatment in onshore wind power generation projects, and specifically relates to a method for strengthening the foundation of a fan. Background technique [0002] As an important field of renewable energy development in my country, wind power has significant social and environmental benefits. With the rapid development of my country's wind power industry, there is a strong demand for onshore wind turbine infrastructure. The base ring type of wind turbine foundation is widely used in the onshore wind power industry. Under the effect of long-term reciprocating wind power load, the swing of the base ring will cause the base ring bottom flange and the surrounding concrete to move relative to it, causing cracks. ; With the continuous expansion of the fracture surface, the water stop of the fan foundation fails, and the water seeping into the foundation gradually fills the gap of the entire fracture s...

Claims

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Application Information

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IPC IPC(8): E02D15/02E02D37/00
CPCE02D15/02E02D37/00E02D2250/003
Inventor 陈金军汤群益张栋梁俞华锋吴芳和
Owner POWERCHINA HUADONG ENG COPORATION LTD
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