What is shotcrete slope protection? At this stage, what is the basic situation of shotcrete slope protection in my country? What’s the basic overview? The following is the content related to the professional construction terminology of shotcrete slope protection by the editor of Zhongda Consulting. The basic situation is as follows:
The editor made inquiries through the construction industry encyclopedia website - Construction Network Construction Knowledge Column, and sorted out the relevant information of shotcrete slope protection. The basic content is as follows:
First of all, we first understand the basic process of shotcrete slope protection:
1) Straighten the reserved steel bars and clean up the surface mortar and other debris. . First set up 2 to 4 longitudinal ribs and mark the horizontal ribs, then tie two positioning horizontal ribs at the lower part and at chest level, and mark the horizontal ribs, then tie the remaining longitudinal ribs, and finally tie the rest. Horizontal ribs. The spring wall line is chiseled and the slope concrete is repaired with laitance. The lap bars are reserved and the longitudinal bars are tied and the transverse bars are tied and the tie bars or support bars are tied.
2) After the steel bars are tied, secure the pads or washers to ensure The thickness of the protective layer of steel bars. Minimum cover thickness for longitudinal reinforcement.
3) Reinforced mesh binding. The intersection points of all steel bars must be firmly tied. When binding, the wires at adjacent binding points should be buckled into a figure-eight shape to prevent the mesh from skewing and deforming.
4) In order to control the thickness of the protective layer of wall steel bars, steel ladders and benches should be used to replace the wall steel bars in situ with a spacing of about 1500mm.
5) The overlap length of horizontally distributed steel bars should not be less than 1.2la. (la is the anchorage length of the steel bar). The clear spacing in the horizontal direction between the lap joints of horizontally distributed steel bars in the same row and between the lap joints of adjacent horizontally distributed steel bars above and below should not be less than 500mm.
6) Vertically distributed steel bars can be overlapped at the same height, and the overlap length should not be less than 1.2la.
7) Anchorage of distributed steel bars: The horizontally distributed steel bars should be extended to the end of the wall, bent horizontally inward for 10 days and then cut off, where d is the diameter of the horizontally distributed steel bars.
8) Before concrete spraying, trim the protruding wall steel bars and tie a temporary horizontal bar to fix the spacing of the protruding bars (the spacing of the thrown bars). When the wall concrete is poured, a special person is assigned to take care of the steel bars. After the pouring is completed, the protruding steel bars (thrown bars) are immediately trimmed.
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