摘要
求解附加应力的布西涅斯克解答和弗拉曼解答与朗肯土压力理论结合，可用来计算挡土墙受矩形铅直均布荷载和条形铅直均布荷载作用，在墙背处引起的附加主动土压力和附加被动土压力的变化情况。这种计算方法可以较准确地考虑荷载作用型式、作用位置、作用范围和极限平衡状态的影响，可以反映外荷通过填土传递过程的变化，得出的附加土压力较小。实例计算表明，当荷载作用在距墙背一定距离处，附加土压力在墙顶处为零，沿墙背增大到一定值后又逐渐减小；当荷载直接作用在墙背上，附加土压力在墙顶处最大，沿墙背逐渐减小；且荷载直接作用在墙背上引起的附加土压力大于荷载作用在距墙背一定距离处引起的附加土压力；当荷载作用性质相同，条形荷载引起的附加土压力大于矩形荷载引起的附加土压力。
The Boussinesq and Flamant solutions for superimposed stress,
combined with the Rankine earth stress theory, can be applied to calculate the active and
passive superimposed stresses of retaining wall with vertical rectangular and strip load. The
method can more accurately deal with the type and location and area of load and the influence
of limit equilibrium state than the other methods can do, and can reveal the propagating change
of external load by the fill, the calculating result is smaller. The calculations of some examples
show that if the load location is of a distance away from the wall, the stress is zero at top of
wall, but it will increase along the depth, and upto a value then decrease. If the load is located
at the top of wall, the maximum stress is at the top and it will decrease along the depth. The
stress in the case is greater than that at the first situation. Under the same condition, stress
caused by strip load is greater than that caused by rectangular load.
出处
《岩土工程技术》
1999年第1期22-26,40,共6页
Geotechnical Engineering Technique
关键词
挡土墙
连续荷载作用
附加土压力
均布荷载
retaining wall
vertical rectangular load
vertical strip load
vertical superimposed stress
superimposed earth
pressure
