Efficient repair process of building pile foundation
A technology for buildings and pile foundations, applied in construction, foundation structure engineering, sheet pile walls, etc., can solve problems such as substandard quality, extended construction period, and increased costs, and achieve high soil spalling and collapse, prevent soil spalling and collapse, and strengthen The effect of surface corrosion resistance
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Embodiment 1
[0025] The present embodiment provides a kind of building pile foundation restoration technology, comprises the steps:
[0026] S1. Excavate a side well on the side of the cast-in-place pile foundation of the bridge near the substandard part. The smaller the inner diameter of the side well, the better. In this embodiment, the diameter is 80 cm, so that the cast-in-place pile foundation of the bridge can be as small as possible. The outer wall of the side is exposed in the side well, and the depth of the side well is controlled to be at least 30cm deeper than the lowest end of the substandard part; in this embodiment, since the height range of the substandard part is 5.8-6.1m, therefore The depth of the lateral shaft is 6.15m;
[0027] S2. Cut off the part that does not meet the standard, and check up and down to confirm that the pile foundation part mixed with sand has been completely cut off to form a cut-off space connected with the side well, and clean up the cut-off mud an...
Embodiment 2
[0039] This embodiment provides a pile foundation repairing process, which is an improvement on the basis of Embodiment 1, the difference is that in step S3, the repairing concrete is used to completely pour the chiseled space and the side shaft.
[0040] The advantage of this embodiment is that the poured repair concrete can be filled into the inside of the excavated space under a very large pressure, and is in close contact with the inner wall of the excavated space; The uneven support strength of the pile foundation can enhance the supporting effect of the original pile foundation.
Embodiment 3
[0042] This embodiment provides a pile foundation repair process, which is an improvement on the basis of embodiment 1 or embodiment 2, the difference is that in step S3, before pouring the repair concrete, the inner wall of the chiseled space is first And smear a layer of adhesive on the outer wall of the bridge pouring pile foundation exposed in the side well, the adhesive includes by weight: cement: medium sand: melon stone: E44 epoxy resin: benzene Butyl dicarboxylate: KH-560 silane coupling agent: curing agent=440:660:967:119:7.4:2.2:89.
[0043] The above-mentioned adhesive can well connect the outer wall of the original pile foundation and the newly poured repair concrete, thereby enhancing the bonding force between the repair concrete and the original pile foundation. Under the test conditions of the above-mentioned adhesive, the axial tensile strength of the new-old interface is about 1.7Mpa, the splitting tensile strength is about 1.14Mpa, and the shear strength is a...
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Abstract
Description
Claims
Application Information
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