{"product_id":"soil-confined-geosynthetic-transmissivity-tester","title":"Soil-Confined Geosynthetic Transmissivity Tester","description":"\u003ch2\u003e\u003cspan\u003eSoil-Confined Geosynthetic Transmissivity Tester – QualiGTX™ IPF S\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eThe QualiGTX™ IPF S Soil-Confined Transmissivity Tester determines the in-plane flow capacity of drainage geocomposites, geonets, and drainage boards under simulated field conditions. Unlike conventional testing methods that clamp specimens between rigid steel platens, this instrument evaluates drainage materials buried between layers of compacted soil. Qualitest provides the IPF S for geotechnical laboratories, landfill design professionals, and transportation engineers who require drainage measurements representative of actual installation conditions rather than index values.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe instrument features an 800 × 500 × 650 mm test box designed to accommodate soil layers above and below a 450 mm flow length of drainage material. Water enters through the upstream boundary, passes along the confined specimen, and exits downstream for collection and measurement.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eSoil confinement can significantly influence measured flow capacity. When a geotextile is pressed against a drainage core by surrounding soil, it can deflect into the core openings and restrict the channels through which water flows. This behavior cannot be accurately reproduced using rigid-platen testing. Consequently, measurements obtained between steel plates may substantially overestimate the flow capacity that the same drainage product achieves under actual ground conditions.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe IPF S enables design teams to establish reliable, project-specific reduction factors instead of relying on generalized values from published literature. By filling the test chamber with the actual subgrade, backfill, or cover soil specified for a project, laboratories can determine flow capacity under representative site conditions rather than relying solely on catalog data. This provides contractors, owners, and design reviewers with more defensible performance measurements.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eSoil-Confined Geosynthetic Transmissivity Tester – QualiGTX™ IPF S Applications\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eThe QualiGTX™ IPF S is suitable for projects involving drainage geosynthetics installed beneath soil layers, where the influence of soil confinement on flow capacity must be considered during design and performance evaluation.\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eLandfill Cap and Cover Drainage:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Evaluates drainage performance beneath compacted cover soil profiles constructed inside the test chamber.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eRailway Subgrade and Trackbed Drainage:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Simulates contact between ballast, subgrade, and drainage materials to assess drainage performance beneath railway track structures.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eHighway Embankment and Subsurface Drainage:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Tests edge drains and drainage blanket layers confined by the fill materials specified for highway alignments.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eRetaining Wall and Reinforced Soil Backfill:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Assesses drainage components positioned between structural backfill layers, where pore pressure relief is essential to stability.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eGreen Roof and Podium Deck Systems:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Evaluates drainage mats subjected to the loading and contact conditions created by growing media rather than rigid plates.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eGeotechnical Design Verification:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Establishes project-specific intrusion reduction factors for drainage layer sizing and design calculations.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eDrainage Geocomposite Product Development:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Compares drainage core configurations and geotextile stiffness under soil contact conditions that influence field performance.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eMining and Heap Leach Pad Engineering:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Measures the flow characteristics of solution collection layers confined by ore and drainage aggregate.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eAgricultural and Land Drainage:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Evaluates subsurface drainage products installed beneath cultivated soil profiles.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eResearch and Academic Laboratories:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Supports investigations into soil intrusion, long-term creep behavior, and differences between index flow values and actual performance measurements.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cspan\u003eSoil-Confined Geosynthetic Transmissivity Tester – QualiGTX™ IPF S Key Features\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eThe QualiGTX™ IPF S is specifically designed to reproduce the soil contact conditions that influence the performance of buried drainage geosynthetics.\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eSoil-Confined Test Chamber:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Positions compacted soil above and below the specimen to measure flow capacity under conditions representative of actual service environments rather than idealized rigid-platen arrangements.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eLarge 800 × 500 × 650 mm Test Box:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Provides sufficient space for realistic soil layer thickness on both sides of the specimen, minimizing boundary effects associated with shallow test chambers.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003e450 mm Specimen Flow Length:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Provides an extended flow path that supports steady-state conditions while minimizing the influence of edge effects on test results.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eProject-Specific Soil Configuration:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Accommodates the actual subgrade, backfill, or cover soil specified for a project, allowing the determination of reduction factors based on site-specific conditions.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003ePerformance-Test Boundary Conditions:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Provides a confined testing arrangement that complements index measurements and supports the performance data increasingly expected during design reviews.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eRigid Floor-Standing Frame:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Supports the weight of a fully loaded soil test box while maintaining structural stability and preventing deflection that could affect the flow geometry.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eSelf-Contained Cabinet Layout:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Integrates the test chamber, flow path, and water collection arrangement within a compact 1040 × 660 × 1200 mm footprint, suitable for installation in a standard laboratory bay.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cspan\u003eTheory and Method\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eIn-plane flow capacity testing generally involves two approaches: index testing and performance testing. Index testing secures a specimen between rigid platens to produce repeatable measurements for comparing different drainage products. Performance testing replaces these rigid surfaces with the materials that will contact the drainage layer during actual service. This changes the testing boundary conditions and can substantially influence the measured results. The QualiGTX™ IPF S performs performance-based testing by confining the specimen between compacted soil layers inside its test chamber.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eSoil intrusion is the primary factor behind the difference in measured flow capacity. Pressure from surrounding soil causes the geotextile to deflect into the open apertures of the underlying drainage core, reducing the cross-sectional area available for water movement. Fine soil particles can also penetrate the drainage channels. These effects reduce both the core thickness and its available open flow area. As a result, the flow capacity measured under soil confinement may decrease to a fraction of the value obtained using rigid platens for the same drainage product. Designers account for this reduction by applying intrusion reduction factors to catalog transmissivity values.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe testing procedure uses the constant-head method. First, the operator prepares the soil profile inside the 800 × 500 × 650 mm test box and positions a 450 mm flow length of drainage material within the soil layers. The cover soil is then compacted to the specified target density. Water is introduced at the upstream boundary and flows through the confined specimen toward the downstream outlet. Once steady-state flow is established, the discharged water is collected over a measured time interval to determine the specimen's flow capacity.\u003c\/span\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch2\u003eSoil-Confined Geosynthetic Transmissivity Tester - QualiGTX™ IPF S Technical Specifications\u003c\/h2\u003e\n\u003ctable class=\"table table-style-align-center\" align=\"center\" border=\"1\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpecimen Length\u003c\/td\u003e\n\u003ctd\u003e450 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTest Box Dimensions\u003c\/td\u003e\n\u003ctd\u003e800 × 500 × 650 mm (L × W × H)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTest Configuration\u003c\/td\u003e\n\u003ctd\u003eSoil-confined, specimen buried between compacted soil layers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHead Condition\u003c\/td\u003e\n\u003ctd\u003eConstant head\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMeasured Properties\u003c\/td\u003e\n\u003ctd\u003eSoil-confined in-plane water flow capacity, flow rate per unit width\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOverall Dimensions\u003c\/td\u003e\n\u003ctd\u003e1040 × 660 × 1200 mm (W × D × H)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e220 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Qualitest USA LC","offers":[{"title":"Default Title","offer_id":53459930284343,"sku":null,"price":100.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0786\/1859\/1543\/files\/soil-confined-geosynthetic-trans.webp?v=1793367371","url":"https:\/\/qualitest.us\/es\/products\/soil-confined-geosynthetic-transmissivity-tester","provider":"Qualitest USA LC","version":"1.0","type":"link"}