Convection-accelerating ventilating and cooling anchor pipe and construction method

Abstract

The invention discloses a convection-accelerating ventilating and cooling anchor pipe and a construction method and belongs to the field of slope supporting in cold areas. The convection-accelerating ventilating and cooling anchor pipe and the construction method are suitable for permafrost slopes. The ventilating and cooling anchor pipe comprises an anchor pipe body, a convection pipe, a fiber bag, a connector, an exhaust pipe and a freezing system. The freezing system is composed of a water pump, a water tank, a guide pipe and saline water. The anchor pipe body penetrates a positioning frame and is embedded in the convection pipe. The rear end of the anchor pipe body is connected with the connector. The fiber bag is fixed between two check rings of the connector from the outer side through a clamp. Slurry is frozen and expanded to be anchored to a stable stratum. An anchoring tool is used for anchoring the anchor pipe body to a gasket, and a convection switch penetrates the anchor pipe body and is installed at the end of the convection pipe. One end of the exhaust pipe is provided with an exhaust switch, and the other end of the exhaust pipe is connected with the anchor pipe body through a clamp. The exhaust switch controls closing and opening of the exhaust pipe, and the convection switch controls closing and opening of the convection pipe.

Description

technical field [0001] The invention relates to an accelerated convection ventilation cooling anchor pipe and a construction method, which belong to the field of slope support in cold regions and are suitable for permafrost slopes. Background technique [0002] Most of my country's permafrost is distributed in high latitudes in Northeast China and high altitudes in West China, especially in permafrost areas along the Qinghai-Tibet Railway, where the types of permafrost are the most varied and are extremely sensitive to external conditions. With the continuous advancement of the western development strategy, the economic construction of the western region has been strengthened, and the infrastructure construction has also been continuously improved. More and more roads, railways, oil and gas pipelines, and optical cables have started construction in permafrost areas. , so a large number of permafrost slopes have emerged. If these permafrost slopes are not treated by engineeri...

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Problems solved by technology

However, there are still deficiencies in this invention. For example, the ventilation pipe only relies on cold air to flow into the slope body under the action of its own weight for convective heat exchange. The heat transfer capacity is poor, and the cooling effect is not ideal; , warm air can easily flow through the ventilation and cooling anchor pipes to accelerate the melting of the slope body; the anchoring agent injected is cement slurry, which will release heat of hydration when the cement hardens, and this heat will cause the permafrost to melt, and the refreezing time is longer, which is harmful to the permafrost The stability of the slope has a great influence

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