Pre-stressed anchor cable capable of preventing seepage through mold bags

Abstract

The pre-stressed anchor cable comprises an anchor cable body, a first grouting pipe and a second grouting pipe are fixed to the anchor cable body side by side, the lower end of the first grouting pipe is open, and the lower end of the second grouting pipe is sealed; the upper end of the anchor cable body is sleeved with a first anti-seepage mold bag and a second anti-seepage mold bag, and the first anti-seepage mold bag is located below the second anti-seepage mold bag. The first grouting pipe penetrates through the first anti-seepage mold bag and the second anti-seepage mold bag, a plurality of first grout outlet holes are longitudinally distributed in the portion, located in the first anti-seepage mold bag, of the first grouting pipe, a packer is arranged in the portion, located below the first grout outlet holes, of the first grouting pipe, and the packer is located in the first anti-seepage mold bag; the lower end of the second grouting pipe extends into the second anti-seepage mold bag, and a plurality of second grout outlet holes are longitudinally distributed in the second grouting pipe located in the second anti-seepage mold bag. The pre-stressed anchor cable can effectively control the water leakage phenomenon of an orifice in the anchor cable construction process, and the follow-up leaking stoppage cost is saved.

Description

technical field [0001] The invention belongs to the technical field of foundation pit reinforcement construction, and in particular relates to a prestressed anchor cable utilizing a mould bag to prevent seepage. Background technique [0002] When using prestressed anchor cables for foundation pit soil reinforcement construction in strata, especially in complex strata, often due to abundant groundwater, the phenomenon of foundation pit leakage is easy to occur during drilling, resulting in foundation pit damage and endangering construction personnel and construction equipment. security. At present, prestressed anchor cables are often used for soil reinforcement of foundation pits in China. However, due to poor treatment of the borehole orifice and damage to the grouting material after prestressing, the phenomenon of water leakage is common, which affects the subsequent construction. The cost of plugging construction is high. SUMMARY OF THE INVENTION [0003] In order to s...

AI Technical Summary

Problems solved by technology

[0002] When prestressed anchor cables are used to reinforce the foundation pit soil in strata, especially in complex strata, due to the abundance of groundwater, water leakage in the foundation pit is prone to occur during drilling, resulting in damage to the foundation pit and endangering construction personnel and construction equipment. safety

At present, prestressed anchor cables are often used for soil reinforcement in domestic foundation pits. However, due to poor treatment at the hole opening, damage to the grouting material after prestressing, and water leakage are common, affecting subsequent construction, and High cost of plugging construction

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