Q-Basing runs and interprets sonic and ultra-sonic tests of building basing. Its director, Shlomo (Gushi) Aizner, has more than 15 years’ experience in building and infrastructure project management, and has tested upwards of 80,000 piles and other elements in public buildings, schools, bridges, security factories, IDF bases, housing towers and private homes since the year 2000.
Q-Basing aims to supply our customers with precise test of quality to find any security defects in a building’s base while still in the preliminary stages of its erection, thus eliminating the need for complex and expensive repair work after building completion. We also carry out non-destructive tests of existing buildings to test compliance with, among other things, Israeli Planning Guidelines for Seismic Strengthening (TAMA 38).
Many site factors can influence a test’s outcome. Therefore we make sure that the test’s interpreter is the same person who carried it out in the first place, and account for such factors as the kind of drill employed, a pile’s outward appearance and the soil section at the site, thus ensuring trustworthy interpretation of the site.
To ensure the tests’ maximum credibility and precision, Q-Basing uses Piletest.com equipment – the most advanced of its kind. Our test equipment in most cases allows for preliminary interpretation at the site itself, directly after the test is administered, as well as speedy production of detailed reports for our clients. Shlomo Aizner’s rich experience in directing infrastructure work means he has a deep understanding of clients’ needs, including working in tests at minimum change to a contractor’s busy schedule.
Our clients have included private customers, many contractors and several of Israel’s leading construction companies: Ashtrom, U. Dori Group, Shikun & Binui, Ortam Sahar, Meshulam Levinstein, Minrav and others.
Why is pile testing necessary?
A pile is an element penetrating deep into the earth, transferring a building’s load to a more secure soil stratum. And although drilling and pile casting have come a long way, they still have to do with pouring a thick substance – fresh concrete – into a hole in the ground. The invisible drilling and pouring procedure takes place underground. A host of elements can conspire to bring about defects in this procedure: spaces created during the pouring procedure because of insufficient covering of the cast-iron rod; foreign material falling into the pile in the pouring procedure; rockslide during drilling or pouring; concrete mixing with foreign material; a concrete rift; and finally, ground water swell.
Basing piles are hidden from view from the moment they are poured in the ground, and unless sonic tests are carried out on them before the rest of the foundation is constructed, most of them will be not testable at a later stage. Construction quality assessment companies have no way of assessing defects in piles after construction completion. Only building sinking and cracks that form over time attest to defective piles. The damage that a building with defective piles might sustain in the event of an earthquake is unknown. Repairing sinking and cracking damages is cumbersome and expensive, subjecting a building’s residents to unnecessary trouble. The cost of testing piles at the start of construction is a fraction of the cost of repairing possible future damages, not to mention the construction of the building itself.
There are two main methods for testing piles: the sonic one and the ultra-sonic one. Both tests do no damage to the analyzed pile. Tests can be carried out several days after the concrete hardens. These tests are the only way to ascertain piles’ length and contiguity, as well as any potential defects’ depth and size. They do not, however, supply any information about a pile’s endurance and strength.