Recommendations on Excavations (eBook)

Edited by the TC "Excavations" of the German Society for Geotechnics (DGGT).

Der Arbeitskreis 2.4 "Baugruben" in der Fachsektion "Erd- und Grundbau" der Deutschen Gesellschaft für Geotechnik e. V., Essen (DGGT) arbeitet auf ehrenamtlicher Basis.

GENERAL RECOMMENDATIONS
Civil engineering requirements for applying the Recommendations (R l)
Governing regulations (R 76)
New safety factor approach (R 77)
Limit states (R 78)
Support of retaining walls (R 67)
Using the EAB in conjunction with the Eurocode 7-1 (R 105, draft)
ANALYSIS PRINCIPLES
Actions (R 24)
Determination of soil properties (R 2)
Earth pressure inclination angle (R 89)
Partial safety factors (R 79)
General requirements for adopting live loads (R 3)
Live loads from road and rail traffic (R 55)
Live loads from site traffic and site operations (R 56)
Live loads from excavators and lifting equipment (R 57)
MAGNITUDE AND DISTRIBUTION OF EARTH PRESSURE7
Earth pressure load as a function of the selected construction method (R 8)
Magnitude of active earth pressure without surcharge loads (R 4)
Distribution of active earth pressure load without surcharges (R 5)
Magnitude of active earth pressure from live loads (R 6)
Distribution of active earth pressure from live loads (R 7)
Superimposing earth pressure components with surcharges (R 71)
Determination of at-rest earth pressure (R 18)
Earth pressure in retreating states (R 68)
GENERAL STIPULATIONS FOR ANALYSIS
Stability verification (R 81)
General information on analysis methods (R 11)
Determination and verification of embedment depths (R 80)
Determination of action effects (R 82)
Limit load design method (R 27)
Modulus of subgrade reaction method (R 102)
Finite-element method (R 103)
Verification of the vertical component of the mobilised passive earth pressure (R 9)
Verification of the transmission of vertical forces into the subsurface (R 84)
Stability verifications for braced excavations in special cases (R 10)
Verification of serviceability (R 83)
Allowable simplifications in the STR limit state (R 104, draft)
ANALYSIS APPROACHES FOR SOLDIER PILE WALLS
Determination of load models for soldier pile walls (R 12)
Pressure diagrams for supported soldier pile walls (R 69)
Passive earth pressure for soldier pile walls with free earth supports (R 14)
Toe restraint for soldier pile walls (R 25)
Equilibrium of horizontal forces for soldier pile walls (R 15)
ANALYSIS OF SHEET PILE WALLS AND IN-SITU CONCRETE WALLS
Determination of load models for sheet pile walls and in-situ concrete walls (R 16)
Pressure diagrams for supported sheet pile walls and in-situ concrete walls (R 70)
Soil reactions and passive earth pressure for sheet pile walls and in-situ concrete walls (R 19)
Toe restraint for sheet pile walls and in-situ concrete walls (R 26)
ANCHORED RETAINING WALLS
Magnitude and distribution of earth pressure for anchored retaining walls (R 42)
Verification of force transmission from anchors to the ground (R 43)
Verification of stability at low failure plane (R 44)
Verification of global stability (R 45)
Measures to counteract displacements in anchored retaining walls (R 46)
EXCAVATIONS WITH SPECIAL GROUND PLANS
Excavations with circular plan (R 73)
Excavations with oval plan (R 74)
Excavations with rectangular plan (R 75)
EXCAVATIONS ADJACENT TO STRUCTRUES
Engineering measures for excavations adjacent to structures (R 20)
Analysis of retaining walls with active earth pressure for excavations adjacent to structures (R 21)
Active earth pressure for large distances to structures (R 28)
Active earth pressure for small distances to structures (R 29)
Analysis of retaining walls with increased active earth pressure (R 22)
Analysis of retaining walls with at-rest earth pressure (R 23)
Mutual influence of opposing retaining walls for excavations adjacent to structures (R 30)
EXCAVATIONS IN WATER
General remarks for excavations in water (R 58)
Seepage pressure (R 59)
Dewatered excavations (R 60)
Verification of hydraulic heave safety (R 61)
Verification of buoyancy safety (R 62)
Stability verification of retaining walls in water (R 63)
Dimensioning and construction of excavations in water (R 64)
Water management (R 65)
Monitoring excavations in water (R 66)
EXCAVATIONS IN UNSTABLE Allgemeines
Grundlagen für die Berechnung
Größe und Verteilung des Erddruckes
Allgemeine Festlegungen für die Berechnung
Berechnungsansätze für Trägerbohlwände
Berechnungsansätze für Spundwände und Ortbetonwände
Verankerte Baugrubenwände
Baugruben mit besonderem Grundriß
Baugruben neben Bauwerken
Baugruben im Wasser
Baugruben in nicht standfestem Fels
Baugruben in weichen Böden
Nachweis der Tragfähigkeit der Einzelteile
Messtechnische Überprüfung und Überwachung von Baugrubenkonstruktionen
Anhang
Literatur
Kurzzeichen und Benennungen