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美國(guó)GCTS Testing Systems
美國(guó)GCTS公司是設(shè)計(jì)和生產(chǎn)實(shí)驗(yàn)室和現(xiàn)場(chǎng)的土工、巖石測(cè)試儀器和軟件的專業(yè)廠家，還可以對(duì)原有系統(tǒng)進(jìn)行數(shù)字化升級(jí)和計(jì)算機(jī)數(shù)字伺服控制，并提供咨詢和服務(wù)。GCTS生產(chǎn)全套的計(jì)算機(jī)數(shù)字伺服控制系統(tǒng)包括：電液式動(dòng)三軸測(cè)試系統(tǒng)，動(dòng)態(tài)空心圓柱測(cè)試系統(tǒng)，共振柱扭剪測(cè)試系統(tǒng)，直剪測(cè)試系統(tǒng)，動(dòng)態(tài)單剪測(cè)試系統(tǒng)，非飽和土動(dòng)靜三軸測(cè)試系統(tǒng)，F(xiàn)redlund SWCC土水特征曲線壓力儀，F(xiàn)redlund熱傳導(dǎo)吸力探頭，凍土動(dòng)三軸測(cè)試系統(tǒng)，室內(nèi)水壓力制裂測(cè)試系統(tǒng)，巖石三軸測(cè)試系統(tǒng)，快速巖石三軸測(cè)試系統(tǒng)，巖石單軸壓縮測(cè)試系統(tǒng)，巖石直剪測(cè)試系統(tǒng)，UTMUTM瀝青混合料疲試驗(yàn)機(jī)系統(tǒng)等。

Geotechnical Consulting and Testing Systems provides selection and design of laboratory and in-situ testing apparatus and software ranging from modification and adaptation of existing apparatus to the purchase of new closed-loop computer-controlled systems. The company manufactures a full line of computer-controlled testing systems with either pneumatic or hydraulic loaders. Each system comes with a versatile software package which provides test control, data acquisition, data reduction, and graphing in one easy to learn Graphical User Interface. Testing capabilities include static and dynamic loading of soil, rock, and other construction materials. Static tests include drained and undrained triaxial shear, using conventional loading or arbitrary stress paths, direct shear, consolidation, permeability, and other procedures. Advanced testing capabilities include hollow cylinder, simple shear, and poly-axial systems with optional upgrades for testing unsaturated soils. Dynamic tests include liquefaction, modulus, damping, resilient modulus, and ultrasonic velocity measurements. Other laboratory tests are also possible through the use of a general purpose multiple function generator and data acquisition that allows the user to design his/her own test procedures. Software and hardware for several in-situ tests can also be provided. In addition, the company offers consultation on test result analysis and test data interpretation.

The primary service of the company is testing system design and integration. The testing experience and background of the staff enable us to ensure that a testing system not only works at its final destination but can also be made to generate meaningful data. Among GCTS personnel and consultants are specialized engineers and technicians with a vast experience in instrumentation, electronics, mechanics, manufacturing and other testing equipment related fields. The company has a fully equipped machine shop. Outside shops are also used. Off the shelf and machine-shops-fabricated components are integrated in house and tested before shipment