Construction method of full-bonding support anchor rod

Abstract

The invention relates to the technical field of building construction, and discloses a construction method of a full-bonding support anchor rod. The construction method of the full-bonding support anchor rod comprises the following operation steps of 1, leveling a site; 2, manufacturing the anchor rod; 3, positioning the position of the anchor rod; 4, preparing a drilling machine; 5, digging a mudpit; 6, enabling the drilling machine to be in place; 7, drilling by the drilling machine; 8, mounting the anchor rod; 9, carrying out hole opening slurry supplementing and secondary grouting; and 10, carrying out tensioning. According to the construction method of the full-bonding support anchor rod, in the support anchor rod construction under the unfavorable geology of silty clay and the like,the phenomena of hole collapse and necking in the anchor rod hole forming process can be effectively avoided, and it is guaranteed that the diameter of an anchor hole meets the design requirement; and the plumpness of cement paste in an anchor rod formed hole is completely guaranteed through the mud replacement technology and the secondary grouting technology, the full length of the support anchor rod is fully bonded with cement mortar, it is guaranteed that an anchor rod body makes full contact with a soil body, the bonding friction resistance between the anchor rod body and the soil body isenhanced, and therefore the foundation pit supporting strength is guaranteed.

Description

technical field [0001] The invention relates to the technical field of building construction, in particular to a fully bonded support bolt construction method. Background technique [0002] With the development of society and economy, housing construction projects are getting higher and higher, and the depth of foundation pits is getting deeper and deeper. In addition, foundation pits are affected by geological conditions, and the safety of foundation pits has become the biggest hidden danger to construction safety. At present, 80% of housing construction projects are high-rise buildings, and foundation pit engineering has become an important part of high-rise buildings. The pile-anchor support system is widely used in housing construction because of its good support effect and small impact on earth excavation and main construction. Foundation pit engineering in engineering. Under complex geological conditions, especially unfavorable geological conditions with high water co...

AI Technical Summary

Problems solved by technology

The DTH drilling rig has a dry hole-forming technology, and the dry operation has a fast hole-forming speed, and the crawler-type walking mode is convenient to move on the construction site, but it cannot be used for wet operations with water.

The casing follow-up technology of the auger drilling rig is highly usable and can be used in different environments, but the operation speed is slow, the efficiency is low, and the labor consumption is large

The construction speed of high-pressure rotary spraying technology for down-the-hole drilling rigs is fast, and the requirements for soil quality are high. Cohesive soil is not suitable for spraying, and the rotary spraying body of sandy soil is easy to be too large, and the quality is not suitable for guarantee

[0004] In the case of relatively poor geological conditions such as silty clay, the silty clay has low shear strength and large deformation, and the quality of conventional construction techniques cannot be guaranteed, and the speed is relatively slow

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