Land Construction Company
Multi-channel analysis of surface waves (MASW) is a seismic technique used to characterize the shear wave velocity of the subsurface. The MASW Seismic Survey method resembles seismic refraction in that it involves inducing a sound wave into the subsurface, which is then recorded along a traverse line equipped with an array of sensors. However, MASW leverages the dispersive properties of Rayleigh-type surface waves to ascertain the changes in shear wave velocity with depth.
MASW Seismic Survey is an efficient method for outlining subsurface geological features, including significant stratigraphic alterations (like transitions from sand to silt to clay), the upper rock surface, and the integrity of the upper rock layer. Furthermore, the velocity data collected during an MASW Seismic Survey can assist geotechnical engineers in creating foundation designs and formulating plans for structural remediation and we can also find Voids and Cavity location areas.
MASW Seismic Survey
Multi-Channel Analysis of Surface Waves Techniques (MASW)
The Multichannel Analysis of Surface Waves (MASW Seismic Survey) technique encompasses both active 2D/3D and passive MAM/ReMi 1D versions, which are grounded in the analysis of seismic S-waves that are part of dispersive Rayleigh waves. A defining trait of Rayleigh waves is that they make up roughly 70% of the total elastic energy captured during measurements. The S-wave, whose velocity and attenuation are closely tied to the elastic characteristics and density of the soil, represents around 90% of the Rayleigh wave.
The distinction between the MASW Seismic Survey technique and MAM/Remi is based on the various types of elastic energy sources utilized. In the case of MASW, these sources include a sledgehammer and weight-drop, whereas for the passive measurements of MAM/REMI, random vibrations from nearby traffic, construction activities, and similar sources are employed. These vibrations are frequently produced artificially by machinery such as tractors, trucks, diggers, and bulldozers.
MASW Seismic Survey
Underground Voids and Cavity Detection Survey
⇒ Underground Void Locating and confirming the presence of cavity or weak zones at the project site by using (MASW Seismic Survey).
⇒ Vs profiling for seismic site classification (Vs30) without the need for a borehole.
⇒ Analysis of weaknesses, subsidence (including under existing structures such as concrete floors), and the severity of crack detection and depth in soils and rocks.
⇒ Conducting site reconnaissance before drilling and in-situ testing.
⇒ Mapping of bedrock or glacial till, along with investigations of dams and levees.
⇒ Testing of backfill and quality assurance/quality control for ground improvement.
⇒ Geotechnical evaluations for basements and indoor areas.
⇒ Evaluation of stabilization, consolidation, and verification of the effectiveness of ground strengthening and void backfilling.
⇒ Assessments of foundations for linear structures (railways, highways, pipelines, and roads). Also, we can check the Evaluations of ground stiffness.
MASW Seismic Survey
Company Profile
MASW Seismic Survey
Vision, Mission and Quality
As a civil, earthwork, infrastructure, land survey, topographic survey, gis mapping, Geodetic Control Survey, Control Point, Benchmark Elevation, Underground Utility Mapping, MASW Seismic Survey, Voids and Cavity Detection Survey, Ground Penetrating Radar, and Underground cavity detection, Land Construction Co., adopts a disciplined and consistent approach to each and every time we take on projects… regardless of size or scale.
Our conservative approach ensures all projects tendered for are competitively priced with adequate resources assigned to ensure high-quality delivery in a timely manner.
Our vision is to be the company that others use as their benchmark. We will distinguish ourselves through our ability to consistently deliver on our commitments. Our standards will far exceed the expectations of our clients, but we will always strive for improvement. Our vision statement is to achieve a seamless system, from our first introduction to the final walkthrough. To achieve this, each member of our team must believe in and envelope our company’s culture.
We provide MASW Seismic Survey, Voids and Cavity Detection Survey services to, Rabigh, Jubail, Dammam, Khobar, Riyadh, Makkah, Madinah, Jeddah, Yanbu, Ras Al Khair, Jizan, Tabuk, Khafji, Diriyah Gate Project, Qiddiya, Red Sea Global Project, Jafurah Project, Amaala Project, Neom Project, King Abdullah Economic City, and other Kingdom Saudi Arabia cities and also we can provide survey services in Dubai, UAE, Bahrain, Qatar, and Oman.
MASW Seismic Survey
MASW and ReMi Advantages
Voids and Cavity Detection Survey
Detection of Underground Cavities and Voids Beneath Slabs
⇒ The ability to continuously assess variations in the maximum shear modulus (stiffness) Gmax and Young’s modulus E with changes in depth.
⇒ Enhanced precision in differentiating the elastic properties of the overburden.
⇒ Minimization of probing and drilling activities.
⇒ Identification of layer boundaries and thickness, even beneath denser layers.
⇒ In-situ, non-destructive testing methods (unlike CPT).
⇒ Seismic evaluation of geotechnical Standard Penetration Test across different depths.
⇒ Capability to detect the presence of clayey soils and saturation (which makes GPR unnecessary).
⇒ Applicable for evaluating weathered rocks, embankments, heaps, and similar structures.
⇒ We can detect Underground Void Locating, crack detection and depth, and the presence of cavity or weak zones at the project site by using (MASW).
