DISBEM is a back-analysis software
for analyzing the excavation-induced displacement. It uses the
boundary element method to simulate the excavation and the error
minimization principle to process the measured data. Combination of
the two techniques gives the result in one single step.
DISBEM requires the least expensive instrumentation in rock
engineering. The input data can be obtained in the field as a routine
work by measuring:
-
the radial or the vertical and horizontal displacement due to excavation
or
- the relative movement in the ground along the
borehole as shown in Figure 1. The borehole does not need to be
perpendicular to the opening wall.
-
the convergence between any two points across an opening as shown in Figure 2.
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DISBEM is an essential engineering tool for solving practical problems:
-
estimating the effective stresses acting on the cross section of a drift or a tunnel
- estimating the effective field Young's Modulus of the rock mass
- evaluating the overall rock mass behavior in a particular ground condition
- assessing the effectiveness of support system especially when the
excavation technique or the support is changed or modified
- determining the most representative field data
- calibrating numerical modelling, which would require reliable information in order to produce realistic results comparable with field observations.
DISBEM is developed especially for practical engineers.
It finally makes it possible for you to do the complex analysis by
yourself easily. It features:
-
being easy and straightforward to use
- minimum effort in preparing input data
- convenience in defining the opening geometry
- easy check of input errors with visual display
- time saving for a busy engineer.
DISBEM as an unique analysis tool can be used by an engineer to solve
the day-to-day practical problems in a rational and scientific manner.
DISBEM is also valuable for researchers. In addition to the above
applications, it can help explain why the predicted results sometimes
are far from the observed in the field.
DISBEM is equipped with visual display
which allows the user, in advance:
-
to check the opening geometry
- to check the location of instrumentation
- to correct the data input errors.
DISBEM is very versatile and suitable to any geometry of long openings:
-
circular openings
- non-circular openings
- tunnels, drifts, adits
- underground mining accesses and haulways
- excavations in geotechnical engineering.
For a circular opening, DISBEM only requires the opening radius to
define the geometry and the excavation is simulated by an analytical method.
For other shapes, the coordinates of a few representative points on
the opening boundary are needed to define the geometry and the
excavation is simulated by boundary element method, which has proven
to be well within the accuracy of engineering requireme nts.
DISBEM is based on the isotropic and linear elastic behavior
of a rock mass,
-
to be used for prefailure ground analysis
-
for a complex ground condition, DISBEM can still provide meaningful information because it is the combined end effect of a complex system (i.e., the in situ stresses, rock properties, ground condition, geology, opening design, etc.), not the individu al factor alone, that determines the ground stability.
DISBEM is supplied with arms-length services.
The help is at your finger tips.
DISBEM is very affordable.
The whole package includes:
- software
- instructions
- sample input files.
