Effect of opening of joints on the behavior of concrete dams during operation

Journal Article · Tue Aug 01 04:00:00 EDT 1995 · Hydrotechnical Construction

DOI:https://doi.org/10.1007/BF01544999· OSTI ID:379319

Vovkushevskii, A V; Trapeznikov, L P; Sheinker, N Ya; Ginzburg, S M ^[1]

---

1. and others

The present work presents the results of studies of the effect of thermal opening of joints on the downstream face on opening of the contact joint and was carried out for the example of the dam of the Bratsk hydroelectric station. Theoretical investigations confirmed considerable opening of the contact joint both in nonoverflow and in powerhouse sections. Other conditions being equal, the length of the zone of opening of the contact joint in the powerhouse sections is 2-3 meters greater than in the nonoverflow sections. In the winter period, the zone of opening in the powerhosue sections reaches the grout curtain, while in the summer period, the opening is about half as much. Such opening of the joint, together with decompressions of the foundation, leads to an increase in the uplift pressure, increase of seepage discharges, and decrease of safety against shearing. Calculations showed that the zone of opening of the contact joint can be followed by a closed joint zone with displaced surfaces (sliding zone). The size of the zone depends on many factors and requires further refinements, but in any event, this zone can completely enter the second column.

• Sponsoring Organization: USDOE
• OSTI ID: 379319
• Journal Information: Hydrotechnical Construction, Journal Name: Hydrotechnical Construction Journal Issue: 2 Vol. 29; ISSN 0018-8220; ISSN HYCOAR
• Country of Publication: United States
• Language: English

Related Subjects

13 HYDRO ENERGY
DAMS
EXPANSION JOINTS
HYDROELECTRIC POWER PLANTS
RUSSIAN FEDERATION
STABILITY
T CODES