Summary of Contents for SEITec WaterSilo Series
- Page 1 WaterSilo Urban Stormwater Storage Installation Manual Operating Guidelines SEITec, 25500 Hawthorne Blvd, Suite 1170, Torrance, CA 90505 www.SEITecinc.com...
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Page 2: Table Of Contents
TABLE OF CONTENTS 1. INTRODUCTION ............................. 1 1.1 What is WaterSilo ..........................1 2. HANDLING ................................ 5 2.1 Safety ..............................5 2.2 Unloading............................6 2.3 Positioning ............................6 3. INSTALLATION ............................... 9 3.1 General ..............................9 3.2 Excavation ............................9 3.3 Tank Installation on Compacted Base ................... -
Page 3: Introduction
1. INTRODUCTION 1.1 What is WaterSilo ▪ WaterSilo is a system of vertical, large-diameter, interconnected underground vessels for stormwater storage (cistern), or detention-infiltration (drywell). ▪ WaterSilos are vertically oriented and therefore have a small footprint that fits in the public right of way, and is therefore a highly flexible stormwater management tool, particularly for “Green Streets”. - Page 4 Reinforced Concrete Slab Vault Overflow Inflow Concrete Encasement Vertical Dome Top RFP Tank Figure 1.2: Dome Top WaterSilo Cisterns – Deep Piping Reinforced Concrete Slab Overflow Inflow Concrete Encasement Vertical Open Top FRP Tank Figure 1.3: Open Top WaterSilo Cisterns – Shallow Piping...
- Page 5 Reinforced Concrete Slab Vault Overflow Inflow Grating Concrete Encasement Vertical Open Top FRP Tank Figure 1.4: Open Top WaterSilo Cisterns – Deep Piping Reinforced Concrete Slab Overflow Inflow Concrete Encasement Vertical FRP Shell Dry Well Figure 1.5: WaterSilo Detention-Infiltration Dry Wells – Shallow Piping...
- Page 6 Reinforced Concrete Slab Vault Overflow Inflow Grating Concrete Encasement Vertical FRP Shell Dry Well Figure 1.6: WaterSilo Detention-Infiltration Dry Wells – Deep Piping...
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Page 7: Handling
OSHA regulations. ▪ Federal, state and local codes and regulations always take precedence over SEITec requirements. SEITEC must authorize – in writing and prior to WaterSilo tank or shell installation – any variation to, or deviation from, these instructions. -
Page 8: Unloading
2.2 Unloading ▪ Although SEITEC WaterSilo tanks and shells are rugged, the owner and/or the owner’s representative must take care so that the WaterSilo tank or shell is not dropped or damaged during delivery, unloading and handling on the jobsite. - Page 9 sides. o The two lifting lugs at the top are rigged to one crane via a spreader bar, and the two lifting lugs at the bottom are rigged directly to the second crane (see figure 2.1 A). ▪ With tanks or shells having three lifting lugs at the top and one at the bottom: o The lifting lugs at the top are 120-degree apart and the one at the bottom aligns with one of the three at the top.
- Page 10 A. Lift the Tank with two cranes B. Continue lifting the front while hoisting all four lifting lugs slowly releasing the bottom C. Continue releasing the bottom D. Slowly lower and place the upright till the tank is upright tank in position Figure 2.1: Lifting a WaterSilo Tank with two cranes to rotate it upright...
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Page 11: Installation
▪ Excavations for tank installation may be by either open-dig or the drilled hole method. WaterSilo shells may only be installed by the drilled hole method. ▪ SEITEC recommends that the tank or shell owner seek the advice of a foundation professional engineer to determine the preferred method and location of the excavation, particularly near any existing structures. -
Page 12: Tank Installation On Compacted Base
Excavation Limit Min. 12” Min. 12” Figure 3.1: Excavation limit in proximity of footings 3.3 Tank Installation on Compacted Base ▪ WaterSilo tank installation on compacted base is only permitted with open-dig excavations where groundwater level is always below the WaterSilo tank bottom at all times during the facility life. -
Page 13: Tank Installation On Concrete Base
3.4 Tank Installation on Concrete Base ▪ Where groundwater level may rise above the WaterSilo tank bottom during the project life, then a WaterSilo tank in open-dig excavation shall be installed on a concrete base. ▪ Excavation shall be dewatered to below the native soil level. ▪... -
Page 14: Tank Installation In Drilled Hole
3.5 Tank Installation in Drilled Hole ▪ Drilled hole is the preferred installation method for WaterSilo tanks where soil conditions allow. ▪ The completed drilled hole shall have a minimum clear diameter of 24 inches larger than the WaterSilo tank diameter to leave a minimum gap of 12 inches between the WaterSilo tank body and the drilled hole wall (see Figure 3.4-A). - Page 15 Drilled Hole, Grade Level Min. Diameter, D + 24” Drilled Hole, Depth Shoring (if necessary) Native Soil 24” Min. Pilot Hole Approved (if present) Concrete A. Drilled Hole Complete B. Bottom Concrete Poured Rope Backfill Depth, 7 ft Lifting Max. 12”...
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Page 16: Dry Well Installation
3.6 Dry Well Installation ▪ WaterSilo dry wells are comprised of a vertical FRP shell, which is an open top and bottom WaterSilo tank, with a drywell at the bottom. ▪ Installation of WaterSilo shells in open-dig excavations in not allowed. WaterSilo shells shall only be installed in drilled holes. - Page 17 Shell Drilled Hole, Grade Level Min. Diameter: D + 24” Lifting Shoring (if necessary) 12” Min. Native Soil Pilot Hole (if present) A. Drilled Hole Complete B. Shell Positioned in Place Temporary Sleeve to Protect Inner Surface of WaterSilo WaterSilo Shell Shell during Drywell Approved...
- Page 18 6” Min. Drywell Drilled Hole, 12” Min. Geotextile Max. Diameter: D - 24” Crushed Stone E. Drywell Drilled Hole Complete F. Installation Complete Figure 3.5: WaterSilo shell and drywell installation --- Continued from Page 15...
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Page 19: Backfilling
3.7 Backfilling ▪ Backfilling is the process of placing and compacting select backfill material around and above the installed tank up to the grade level. ▪ Drilled hole installed tanks require backfilling only for the space directly above the concrete encasement and the tank dome. ▪... -
Page 20: Protection Against Surface Loads
may break down over time. ▪ Contractor may use approved geotextile fabric to separate the backfill material from native soils, where necessary. ▪ All backfilling shall proceed in 12-inch lifts and shall extend up to the top per details provided in Section 3.8. ▪... - Page 21 Frequent Foot-Traffic Max. 7.0’ Figure 3.7: Backfill detail for frequent foot-traffic live loads ▪ For heavy vehicular traffic live loads such in public roads with occasional HS20 loading, a 6-in thick engineered reinforced concrete slab on the surface over base and subbase on top of compacted fill, per the detail provided in Figure 3.8, is required.
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Page 22: Piping & Connection
▪ If water level does not stabilize, there may be a leak in the system. If damage is detected, do not attempt repairs. Contact the SEITEC by email at info@seitecinc.com... -
Page 23: Operating Guidelines
▪ A SEITEC WaterSilo tank or shell is designed for water. CAUTION Storing liquids and materials other than water will void SEITec’s obligation under the warranty and may cause WaterSilo tank failure or property damage. ▪ Maximum temperature for water is 150 deg. F.
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