Glass fiber reinforced polymer rebar prestressed anti-floating anchor stock and construction method thereof

Abstract

The invention discloses a glass fiber reinforced polymer rebar prestressed anti-floating anchor stock and a construction method thereof. The glass fiber reinforced polymer rebar prestressed anti-floating anchor stock is characterized in that steel sleeves are arranged; the bottom sleeve ends of the steel sleeves penetrate through the a bottom plate cushion layer and penetrate into a rock foundation layer; the lower section of an anchor stock body is anchored in the rock foundation layer; the upper section of each anchor stock body is sleeved with the corresponding steel sleeve and is fixedly combined with the corresponding steel sleeve through filled epoxy resin; the anchor stock bodies are glass fiber reinforced polymer(GRRP) anchor stocks; a lower bearing plate is arranged on the bottom plate cushion layer; the steel sleeves are sleeved with the lower bearing plate through through hole sliding sleeves; lock nut with the lower bearing plate as the locking end face are arranged on the steel sleeves; and a prestress applying mechanism is arranged on the steel sleeves and used for implementing prestress applying on the anchor stock bodies through force transfer of the steel sleeves. Shear failure to the anchor stock during prestress applying can be avoided, and effective connection of the anchor stock and a bottom plate rebar is ensured, and the anchoring and supporting effects on the anti-floating anchor stock are ensured.

Description

technical field [0001] The invention relates to the technical field of underground engineering of civil engineering, in particular to a prestressed loading device and a construction method for glass fiber reinforcement bolts used in underground engineering. Background technique [0002] With the advancement of science and the development of technology, anti-floating anchors are more and more commonly used in basement raft construction. In actual engineering, methods such as drainage method, weight method, anti-floating pile and anti-floating anchor are usually used to achieve the purpose of anti-floating. Compared with other methods, the anti-floating anchor has strong stratum adaptability and can be dispersed. It is widely used due to its advantages such as low stress, easy construction, high bearing capacity in hard rock and soil layers, short construction period, and low cost. [0003] There are two types of anti-floating anchor rods in the prior art: one is steel strand...

AI Technical Summary

Problems solved by technology

[0005] However, due to the relatively poor lateral shear resistance of fiber reinforcement, if the existing steel anchor prestressing device is used, the lateral shear force generated by the fixture can easily cause the glass fiber reinforcement anchor to be sheared transversely, resulting in glass The prestress of the fiber-reinforced bolt cannot be loaded or the loading cannot reach the design value; not only that, the dislocation between the lower bearing plate and the floor cushion, and the floor cushion and the rock foundation will also cause the glass fiber-reinforced bolt to be sheared damage, which greatly affects the anchoring and support effect of the anti-floating anchor

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