Design method for transverse joint of arch dam of abrupt slope dam section

Abstract

The abrupt slope dam section arch dam transverse joint design method comprises the following steps that (1) the joint position is determined, specifically, the basic position of transverse joint arrangement of an abrupt slope dam section is determined according to the standard requirement of an arch dam in combination with the size of a dam body flood discharge hole and the structural arrangement of holes in the dam; calculating coordinates of an intersection point of each seam and the dam axis according to the dam axis curvilinear equation and the parting length; (2) selecting a transverse joint transition interval of the abrupt slope dam section; (3) determining the arrangement of the transverse joints above the first control elevation; (4) determining the arrangement of a transverse joint below a second control elevation; and (5) determining the arrangement of a transition joint between the first control elevation and the second control elevation. According to the abrupt slope dam section arch dam transverse joint design method, pouring construction of the abrupt slope dam section and the transverse joint face is facilitated, and stress distribution of a triangular body of the abrupt slope dam section is improved.

Description

technical field [0001] The invention relates to the technical field of water conservancy and hydropower engineering, in particular to a method for designing transverse joints of an arch dam with steep slope dam sections. Background technique [0002] In normal concrete arch dams, transverse joints must be provided. Transverse joints are mainly used to reduce the longitudinal constraints of the dam body, to adapt to the uneven settlement and temperature changes of the foundation during the operation period, and to prevent cracks in the concrete. To determine the position and spacing of transverse joints, in addition to studying the dam foundation conditions that may cause cracks in concrete, temperature control, and stress distribution in the dam body, it is also necessary to study the size of the dam body flood discharge orifice, the structural layout of the holes in the dam, and the concrete structure. Factors such as pouring capacity, the transverse joint spacing is gener...

AI Technical Summary

Problems solved by technology

The narrow and deep valley bank slope is steep, with a slope of 50°-70°, and the transverse joints of steep slope dam sections (such figure 1 Middle F1, F2, F4, F5) adopt vertical joints from the dam crest to the dam foundation, which is beneficial to the arrangement of keyways on the transverse joint surface and joint grouting in the later stage. figure 2 ), which is not conducive to the construction progress of the arch dam pouring and the stress of the dam body near the foundation surface

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