Combined double-row-pile combined vertical prestress anchor rod supporting system and construction method thereof

Abstract

The invention relates to a combined double-row-pile combined vertical prestress anchor rod supporting system and a construction method thereof. The supporting system comprises a front row of piles, a front row pile top crown beam, a rear row of piles, a rear row pile top crown beam and connecting beams, wherein the rear row of piles is a profile steel cement stirring pile wall, and each connecting beam is a double-limb connecting beam; insertion profile steel in the profile steel cement stirring pile wall is H-shaped steel, the upper end part of the H-shaped steel is exposed above the rear row pile top crown beam, and a vertical prestress anchor rod is also arranged in the cement stirring pile wall between the insertion profile steel. After the H-shaped steel is used, the H-shaped steel can be recycled, so that the engineering cost can be greatly reduced. The supporting system and the construction method are applicable to a deep foundation pit with complicated peripheral environment condition, limited by red lines and without an ordinary construction oblique anchor rod. The supporting system is a novel supporting form which is large in side movement resisting rigidness, convenient in construction and capable of separating the soil and water.

Description

technical field [0001] The invention relates to a construction method of a building foundation pit support system. Background technique [0002] Ordinary double-row pile support structure is a relatively new form of support that has recently appeared in foundation pit engineering. The support system uses the front and rear rows of reinforced concrete piles and pile top connecting beams to form a space gantry support structure, which greatly increases the resistance to lateral movement. For general foundation pits with small depths, there is no need to set internal supports or anchors in the foundation pit. The cable greatly facilitates the construction and shortens the construction period, and is favored by the designers of foundation pit engineering. However, for the foundation pit project with a high groundwater level and the need for water isolation, since the front and rear rows of separated reinforced concrete piles cannot stop the water, it is necessary to add a water...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a construction method for combined double-row piles combined with vertical prestressed bolt support system, to solve the problem of the double-row pile support structure under the geological conditions of soft soil, silt, fine sand, etc. The application problem of deep foundation pit engineering when the excavation depth is large and water isolation is required, especially when the surrounding environmental conditions of the foundation pit are complex or restricted by the red line and do not have the construction of ordinary inclined anchors, it can be considered to use

Images