Tel: 1-206-279-3300

Online Slope Stability, Soil Nailing, and Inclinometer Monitoring Workshop

4 hours each day, 8 PDH

Slope stability, soil nailing, and inclinometer worksho

July 15, 16, 2020

Upcoming Workshop Series

60 hours

Data, databases, and Machine Learning for Geotechnical Engineers

Data, databases, and machine learning for civil engineers

Aug, Sep, Oct 2020

The future of civil engineering is approaching

Online Deep Excavation and Soil nail wall design Workshop

16 PDH

Apr. 22,23, 29, 30, 2020

Deep excavation in Las Vegas

Early registration ends soon!

DeepEX 2020

Solving Deep Excavation Design

DeepEX 2017 talk to it and design your deep excavation!

Deep Foundation Software, Pile Rafts, Pile Groups

From soil estimation to axial and lateral pile capacity

DeepFND - Deep Foundation Software, caissons, CFA, drilled piles, driven piles, concrete, timber

From soil estimation to helical pile settlement estimation.

New helical pile software HelixPile
Signup for a free trial and get our free pdf on the five most common errors in deep excavation design
What do you want to design?
DeepFND 2020: Deep Foundation software (NEW: Pile-Group/Pile Raft Analysis!)
DeepEX 2020: Deep Excavation software
Soldier pile walls
Sheet pile walls
Secant pile Walls
Tangent piles
Diaphragm Walls
Soldier and Tremied Concrete
Soil Mix walls
Combined king pile sheet piles
Slope stability
Cost estimation for braced excavations
Waler-Strut Cofferdams
Snail-Plus 2019: Soil nailing - soil nailing walls
SiteMaster: Inclinometer software (adopted by Geokon)
HelixPile: Helical Pile Software
RC-Solver: Concrete Design ACI-318, EC2, EC8
Steel-Beam: Steel beam column design, full equations, AISC, EC3

Slope inclinometers

Slope inclinometers are geotechnical instruments used to measure horizontal displacements along various points on a borehole. For this reason, sometimes they are also called borehole inclinometers or simply inclinometers. Slope inclinometers are the most important source of geotechnical data during construction (Erikson et. al., 1992). Slope inclinometers are widely used to measure lateral soil and wall movements in slurry wall and deep excavations (Fig. 3.4). They fall into two categories, 1) probe inclinometers and 2) fixed- in-place inclinometers (Laplante, 1998). Only probe inclinometers have been used in all the studied projects. In either type, a casing with four orthogonal grooves is installed in a borehole in the ground or within a retaining wall. The grooves are designed to fit the wheels of the inclinometer probe. The angle of the probe from the vertical axis is measured in both directions with the use of a sensitive gravity pendulum, tiltmeters, or a servo accelerometer. The deflections are calculated automatically from this angular measurement and from the distance between the wheels (which is known). Deflections are always compared to an initial reading since the casing may not be installed in the vertical position.

Typically measurements are reported at two foot intervals and a process requires up to 15 minutes (Fig. 3.7). The reduced data maybe erroneous and certainly will be less accurate if the measurements are taken at steps greater than the typical two-foot distance between the probe wheels (W3). For better results it is advisable that the inclinometer casing extends to a firm stratum (or to a great enough depth) so that the inclinometer base does not move. For example, walls in floating excavations tend to translate at their bases (B3, B7) and these movements will not be picked up if the inclinometers do not extend beneath the base of the wall (B6). Movements during slurry wall construction can not be measured when all the inclinometers are installed within the diaphragm wall. Thus in order to get a more realistic view of soil movements during slurry wall construction it is suggested that a few inclinometers be installed within soil. In ideal conditions, soil inclinometers should be installed before any construction takes place.

The limitation of inclinometers is that they measure only horizontal ground deformations. Deformation data is necessary to appease abutters worried about potential damage to their property (Laplante, 1998). Slope inclinometers are essential for monitoring deep seated movements especially for land slide stabilization and other slope stability releated issues.

Slope inclinometer

SiteMaster is our new inclinometer software program. SiteMaster produces professional reports and diagrams for a whole construction site with multiple inclinometers. Please click here to find out...

Slideshow image Slideshow image Slideshow image
SiteMaster: Summary of inclinometer displacements with time SiteMaster: Sample cumulative displacements SiteMaster: Site plan image showing max polar displacements.

Deep excavation software

Our flagship software program.
Design deep excavations, stepped walls, piles, sheet pile design, non-linear analysis, secant pile walls, slurry walls, AASHTO,  ACI, AISC, Eurocode 2,3,7,8, British BS standards, + DIN! DeepEX is the software of choice for more than 1200 engineers worldwide.