Hw=4.4 mts, Wembedment=.8 mt, seismic

TensarEarth Retaining Structures

Design Analysis

Output from TensarSoil Version 2.04

Calculations in accordance with: Demo 82 (FHWA 1997) (seismic loading)

Client: Odebrecht

Project: Carretera Constanza-JarabacoaSometido para aprobacin 10 feb. 2011.

H=4mts, Embedment=1mts, Slope at toe, Aceleracin Ssmica (a) =.2g.

TensarEarth RetainingStructure

Mesa Std Connector

IMPORTANTNOTES(Preliminary/ConceptualDesign)

(1) This printout contains an Application Suggestion which has been prepared by a Tensar affiliate or by LICENSEE to enable the application of Tensar Geogrids to beevaluated by a qualified and experience professional engineer. The calculations are derived from a standardized software program which generally follows AASHTO orNCMA design methodologies and which has been modified to incorporate certain properties of Tensar products.

(2) This printout provides certain limited information for preliminary or conceptual design only, and does not itself constitute a design or plan suitable for construction. A finalengineered design and plan, with drawings and installation details and construction requirements, signed and sealed by a registered professional engineer, is required priorto actual construction.

(3) Any mechanically-stabilized earth structure involves various engineering, design, material, construction and end-use considerations. Many of these are site specific, suchas (but not limited to) terrain and grading, watertable, the nature and strength of the foundation and backfill soils, the quality and compaction of the backfill, surface andsubsurface water control and drainage, the presence of utilities and other elements in or around the structure, use of proper equipment and construction practices duringinstallation, neighboring construction activity, load factors, other environmental factors and the like. Final determination of the suitability of any information or material for theuse contemplated and the manner of use is the sole responsibility of the user and its professional advisors, who must assume all risk and liability in connection therewith.Tensar assumes no responsibility or liability to the recipient or any third party for the whole or any part of the content of any Application Suggestion or other work product.

Tensar is a registered trademark.

Method of analysis

The calculation method used in this Design Analysis is the tie-back wedge method for MSE walls given inChapter 4 of Mechanically Stabilized Earth Walls and Reinforced Soil Slopes, Design & ConstructionGuidelines, Federal Highway Administration, Demonstration Project 82, Publication No FHWA-SA-96-071(August, 1997).

Reference Date Page Feb 10 2011 1 of 9

Design analysisprepared by

Designer

.

Tensar International Corporation Atlanta Office

5883 Glenridge Drive, Suite 200

Tel: +1 404 2501290 Atlanta

Fax: +1 404 2509185 GA 30328

E-mail: [email protected] United States of America

www.tensar-international.com


Design Analysis

TensarSoil Version 2.04



Input data and Section Project: Carretera Constanza-Jarabacoa

1

90 90

300.80

1.20

4.40

3.50

Datum

Tensar earth retaining structure Mesa Std Connector

All dimensions in metres Scale 1:100Seismic loading case

Fill/foundation propertiesDesign soilstrengthparameters arepeak values

Soil zone c' ' bulk

(kN/m) () (kN/m)

Reinforced soil 0.0 30.0 19.0

Retained soil 5.0 35.0 19.0

Foundation soil 5.0 30.0 17.6


Design Analysis




Seismicdesign datag =accelerationdue to gravity

Input Limiting External mechanisms Internal mechanismsdeformation

Ah = 0.20g 50 mm kh(ext) = 0.11g kh(int) = 0.25g

Av = 0.00g 50 mm kv(ext) = 0.00g kv(int) = 0.00g

Vertical accelerations may act either downwards or upwards

Soil-geogridinteractionfactors

Sliding coefficient Cds Pullout scale factor 0.80 1.00

Pullout coefficient Ci is given in

reinforcement layout table

Surchargesx values aremeasured from thetop of thereinforced fillblock.

No Load acts from x (m) To x (m) Load (kN/m) Live load/Dead load

1 0.00 6.00 12 Live load

Waterpressure data

Location Height of water level above datum (m) ru

In front of structure No water pressures

Within fill No water pressures NA

Externalstabilityresults

Mechanism Result Min/Max Critical load case OK?

Eccentricity 0.583 m max0.131 m Static OK

Overturning OK1.50 minFS = 6.45 Seismic

Sliding on base 1.50 minFS = 4.03 Static OK

Bearing capacity 2.500 minFS = 5.481 Static OK

Internalstabilityresults

Mechanism OK? Mechanism OK?

Rupture check OK Pullout check OK

Internal sliding OK Connection check OK


Design Analysis




ReinforcementlayoutStarting andfinishing levelsare related todatum

Tensar No of Starting Vertical Finishing Coverage Cigeogrid layers level (m) spacing (m) level (m) (%)

UX1400MSE 1 4.20 - - 100 0.80

UX1400MSE 3 2.60 0.60 3.80 100 0.80

UX1500MSE 3 0.80 0.60 2.00 100 0.80

UX1500MSE 1 0.20 - - 100 0.80

Requiredminimumfactors ofsafetyAs given in Chapter 2.7and Chapter4.3 d & e (forseismic internal& connection)

Mechanism Static loading Seismic loading

Eccentricity e


Design Analysis




Detailed calculation resultsThe following tables provide the detailed results from the design Analysis, including geogrid design data, together with bothexternal and internal analysis results.

Geogrid reinforcement design dataGeogrid strength is calculated following Chapter 3.5 Section b (geosynthetic reinforcement).Connection data given below is defined in Chapter 4.3 Section e and the values given are for the facing system indicated on Page 2.

Design temperature (C) Design life (years)20 120

Tensar Ultimate Creep Durability Installation FS Design Connection datageogrid strength factor factor damage strength

(kN/m) (kN/m)

TaTult CRs CRuRFcr RFd RF id

UX1400MSE 70.00 1.10 1.10 1.502.60 22.28 0.27 1.00UX1500MSE 114.00 1.10 1.10 1.502.60 36.29 0.27 1.00

Geogrid coordinates and design dataLevels are measured from the datum and horizontal location is measured from the toe of the wall

Tensar Level Left end Right end Length Coverage Pullout interactionGeogrid (m) (m) (m) (m) % factor Ci

UX1400MSE 4.200 0.312 4.533 4.321 100.0 0.800UX1400MSE 3.800 0.309 3.530 3.321 100.0 0.800UX1400MSE 3.200 0.304 3.525 3.321 100.0 0.800UX1400MSE 2.600 0.300 3.520 3.321 100.0 0.800UX1500MSE 2.000 0.295 3.516 3.321 100.0 0.800UX1500MSE 1.400 0.290 3.511 3.321 100.0 0.800UX1500MSE 0.800 0.285 3.506 3.321 100.0 0.800UX1500MSE 0.200 0.281 3.502 3.321 100.0 0.800


Design Analysis




External stability - unfactored calculated forces

Forces are calculated as per Chapter 4.2 for both static and seismic loading.

Note: negative forces are upwards

Loading direction Units Vertical Horizontal

Static force components

Forces in or above reinforced block:Soil mass kN/m 269.258Facing kN/m 15.946Dead loads kN/m 0.000Live loads kN/m 38.613

Forces behind reinforced block:From soil kN/m -0.207 26.294From dead loads kN/m 0.000 0.000From live loads kN/m -0.111 14.151

Additional force components due to seismic loading

Forces in or above reinforced block:Soil mass kN/m 0.000 17.734Facing kN/m 0.000 1.761Dead loads kN/m 0.000 0.000Live loads kN/m 0.000 0.000

Forces behind reinforced block:From soil kN/m -0.045 5.727From dead loads kN/m 0.000 0.000From live loads kN/m 0.000 0.000

External stability - eccentricity and overturning

Calculations carried out as per Chapter 4.2 Section d, to establish eccentricity for static loading and

Section h for seismic loading. In addition an overturning calculation is carried out.

Calculation Units Static loading Seismic loading

Total vertical load on base kN/m 284.886 284.953Total moment on base about centreline kNm/m 37.197 63.899Eccentricity m 0.131 0.224

Maximum permitted m 0.583 1.167

OK? OK OK

Driving moment about toe kNm/m 52.831 79.709Restoring moment about toe kNm/m 514.186 514.477FS (overturning) 9.733 6.454

Requirement 2.00 1.50

OK? OK OK


Design Analysis




External stability - sliding

Calculations carried out as per Chapter 4.2 Section e for static loading and Section h for seismic

loading.


Horizontal driving force kN/m 40.445 51.517Horizontal resisting force kN/m 164.479 164.517FS (sliding) 4.067 3.193


OK? OK OK

Additional sliding check

For inclined structures an additional sliding check is carried out with the back of the reinforced soil

block defined by a series of steeper lines until the lowest FS value is obtained.

Critical inclination of wall back deg 90.000 90.000Horizontal driving force kN/m 41.244 52.166Horizontal resisting force kN/m 166.014 166.014FS (sliding) 4.025 3.182


OK? OK OK

External stability - bearing capacity check

Calculations carried out as per Chapter 4.2 Section f for static loading and Section h for seismic

loading, using Meyerhof load distribution to take into account eccentricity. The effect of load

inclination is omitted in accordance with Chapter 3.4 Section a.


Total vertical load on base kN/m 323.499 284.953Total horizontal load on base kN/m 40.445 51.517Total moment on base about centreline kNm/m 30.413 63.899Factor Nc 24.817 24.817

Factor Nq 13.510 13.510

Factor N 14.070 14.070

Effective length L' m 3.312 3.052Ultimate bearing pressure kN/m 535.320 502.979Applied bearing pressure kN/m 97.676 93.381FS (bearing capacity) 5.481 5.386


OK? OK OK


Design Analysis




Internal stability - static loadingCalculations carried out as per Chapter 4.3 Section b (tension check), Section c (pullout check) andSection e (connection check).

Geogrid Data Factor of safety

Tensar Level Length Sv Cov Ta Tmax FS FSpo FScon FScongeogrid (m) (m) (m) % (kN/m) (kN/m) tension pullout rupture pullout

UX1400MSE 4.20 4.32 0.40 100 22.28 2.11 FS10.58 3.05 11.64 8.98UX1400MSE 3.80 3.32 0.50 100 22.28 4.06 FS5.49 2.74 6.04 4.66UX1400MSE 3.20 3.32 0.60 100 22.28 6.96 FS3.20 4.23 3.52 2.72UX1400MSE 2.60 3.32 0.60 100 22.28 9.24 FS2.41 5.95 2.65 2.05UX1500MSE 2.00 3.32 0.60 100 36.29 11.52 FS3.15 7.61 3.47 2.67UX1500MSE 1.40 3.32 0.60 100 36.29 13.80 FS2.63 9.25 2.89 2.23UX1500MSE 0.80 3.32 0.60 100 36.29 16.08 FS2.26 10.87 2.48 1.91UX1500MSE 0.20 3.32 0.50 100 36.29 15.14 FS2.40 15.13 2.64 2.03

Minimum requirement 1.5 1.5 1.5 1.5

Internal stability - seismic loadingCalculations carried out as per Chapter 4.3 Section d (seismic check, both tension and pullout) andSection e (connection check for seismic).

Geogrid Data Factor of safety

Tensar Level Length Sv Cov Ta Tmax Tmd FS FSpo FScon FScongeogrid (m) (m) (m) % (kN/m) (kN/m) (kN/m) tension pullout rupture pullout

UX1400MSE 4.20 4.32 0.40 100 22.28 0.51 2.92 13.659 1.499 16.03 4.41UX1400MSE 3.80 3.32 0.50 100 22.28 2.06 1.69 8.228 2.377 9.25 4.04UX1400MSE 3.20 3.32 0.60 100 22.28 4.56 2.23 4.111 3.469 4.59 2.23UX1400MSE 2.60 3.32 0.60 100 22.28 6.84 2.78 2.817 4.573 3.14 1.57UX1500MSE 2.00 3.32 0.60 100 36.29 9.12 3.32 3.489 5.638 3.88 1.98UX1500MSE 1.40 3.32 0.60 100 36.29 11.40 3.87 2.815 6.686 3.13 1.61UX1500MSE 0.80 3.32 0.60 100 36.29 13.68 4.41 2.359 7.725 2.62 1.36UX1500MSE 0.20 3.32 0.50 100 36.29 13.14 4.96 2.411 10.122 2.68 1.36

Minimum requirement 1.125 1.125 1.1 1.1


Design Analysis




Internal sliding check - sliding on geogrids

DEMO 82 does not include a specific requirement or definition for checking sliding on geogrids, socalculations are carried out as per the external check, Chapter 4.2 Section e for static loadingand Section h for seismic loading.

Geogrid Data Static loading Seismic loading

Tensar Level Cov Ci Driving Resisting FSSL Driving Resisting FSSLgeogrid (m) % forces forces Sliding forces forces Sliding

(kN/m) (kN/m) (kN/m) (kN/m)

UX1400MSE 4.20 100 0.800 0.16 16.42 100.00 0.16 16.43 100.00UX1400MSE 3.80 100 0.800 0.29 28.67 100.00 0.54 28.68 52.73UX1400MSE 3.20 100 0.800 1.25 47.04 37.53 3.13 47.05 15.04UX1400MSE 2.60 100 0.800 4.63 65.40 14.12 7.76 65.41 8.43UX1500MSE 2.00 100 0.800 9.84 83.75 8.51 14.44 83.77 5.80UX1500MSE 1.40 100 0.800 16.88 102.09 6.05 23.17 102.12 4.41UX1500MSE 0.80 100 0.800 25.76 120.43 4.68 33.95 120.46 3.55UX1500MSE 0.20 100 0.800 36.47 138.76 3.81 46.78 138.79 2.97

Minimum requirement 1.5 1.125

Documents

Hw=4.4 mts, Wembedment=.8 mt, seismic