gab QUADRO INSTRUCTION

Transcription

1 gab QUADRO INSTRUCTION

2 Please note, that the following recommendations represent German standards. Please consider the technical standards of your country regarding setting up of gabions. General Advice Read and follow the information provided by the manufacturer. Wear safety footwear and safety gloves when setting up of gabions. Sufficiently weight-bearing ground is required for the setup up of gabions. Attention! Falling hazard during setup, no climbing or stepping on gabions. Make sure no metal wire ends are poking out of the gabion construction. Additionally the relevant regulations of the insurance organization need to be met as well as the local building regulations and design standards. Ground foundations and foundations In general a leveling course and a base course are required as foundation for igggab QUADRO gabions. They can consist of either: Graded rock fill from gravel and sand Broken or crushed stone (size 0-45 mm) Concrete C12/15 XC2 See page 8 to 10 for more information regarding type static! Static requirements must be observed by all means. Advice on stability We expressly note that the following standards and notices need to be taken into consideration for all gabion constructions: DIN EN /NA draft, Calculation and dimensioning in geotechnics, Part 1: General rules (Replacement for DIN 1054 (05-01)) DIN EN /NA draft, Calculation and dimensioning in geotechnics, Part 2: Building ground investigation and analysis DIN supplementary regulations to DIN EN DIN EN /NA dimensioning and construction of concrete structures FGSV fact sheet for retaining structures manufactured using concrete elements, stacked blocks and gabions (03)-555 FLL brochure Recommendations for planning, construction and maintenance of gabions All construction work containing gabions which exceed a height of two meters require proof of stability as well as a geotechnical investigation. Delivery The igggab QUADRO gabion system is being delivered as construction kit in individual parts. Check the entire delivery for completeness on the basis of the enclosed delivery note. Check the delivery for damages which might have occurred during transport. When unpacking the delivery, sort the pallets and the individual parts according to their type and size. BASKET VERSION SCOPE OF DELIVERY Base (A) Front (B) Back (B) Front wall (D) Top (E) Beginning 5 x 10 complete Following 5 x 10 complete Beginning 10 x 10 complete Following 10 x 10 complete Beginning Following Mix Mix 5 x x x x We are not liable for the given information and content.

3 (Set up shown for the example of gabion type 211.) Step 1 Place the base (A) as well as the front and the back (B) on the prepared foundation. Join the edges of part A and B with spiral binders (C) by fastening them to the outer part of the grid bars. Make sure the edges of part A and B are properly aligned. C A B Assembly of gabions in Version Mix (mesh of 5 x 10 and 10 x 10 cm) pay attention to the fact that for all elements (bases, partitions, backs) which will not be visible later on, a mesh of 10 x 10 cm needs to be used. B C Step 2 Place the front walls at the left and right side of the gabion base and joint the edges with spiral binders (C) as explained in step 1. C D A B To assemble a continuous row of gabions, only one front wall is placed in between the first gabion and all following units. B D C C C Step 3 Place side walls (B) and front walls (D) vertically and join the edges with spiral binders (C). The vertical steel wires of the grid mat are directed outwards, while the horizontal steel wires are directed inwards. C C 3

4 cm cm cm Step 4 Before starting to fill the gabions, the base of the lower gabion row needs to be filled with crushed stones 8/16 mm (up to 5 cm on top of base grid). Mount now the first row of spacers at a height that is suitable for the type of gabion being used (e.g. up to cm on top of the base grid). In order to obtain a closed loop (see 4.1), use pliers or a pipe in order to tighten the spacer ends. 4.1 cm cm cm cm cm The spacers are mounted on the grid crossing points. No liability is taken for incorrect installation of spacers. See page 11 to 14 for description on various gabion types. cm cm cm cm cm cm cm cm cm Alternative: instead of using long spacers (100 cm), also an additional partition can be mounted in the basket for all gabions having a length of 2.0 m. In this case, 8 additional short spacers (50 cm) as well as 4 spiral binders are required (e.g. for gabion type 211). cm cm cm Gabion Type 211 Step 5 AUXILIARY FORMWORK To avoid bulging of the outer grids when filling the baskets, ladders or timber beams can be fixed to the outer basket sides. 4

5 Step 6 Minimize voids when filling the gabion basket with the provided frost-proof and pressure-stable natural stone up to the first row of spacers. Proceed as described in step 4 to place the upper row of spacers (e.g. up to 70 cm on top of the base grid). Minimize voids when filling the gabion basket to its final height. Each additional stone layer needs to be compressed. The stones need to be placed closely to the wire mesh. Pay attention to correctly fill gabion corners with assorted stones. Eventually stones need to be placed in the corners by hand or some stones need to be especially shaped in order to fit into these corners. cm cm cm Step 7 The surface of the last stone layer is to be covered with fin-grained material. Thus a sufficient level of stability for the top grid can be ensured. The grain size should be adapted to the filling in order to avoid any kind of erosion. Fill gaps after filling up the basket to the upper edge (16/32 mm or 32/56 mm). Fix the top (E) with spiral binders to the side walls. This is also true for neighboring baskets. Sprinkle the closed gabion with the same material on the top which has been used for the filling. Gently pull up the top (E), a bump will result. E One spiral is sufficient to bind the grids in all possible combinations. 5

6 Backfilling of gabions Suitable backfilling material according to ZTV E-StB Coarse soil that can be compressed and that is permeable to water, having a friction angle of min. and a coefficient of permeability of >1*10-5 m/s Inadequate backfilling material results in undesirable water accumulations Compression in layers Pay attention to any kind of shifting or to modifications that might occur in the construction Compactors should not touch the gabion wall Geotextile filter iggtecx gabion separator max. 150 g/m² for filling material that is not filter stable towards each other Handling of slope behind gabion wall during construction Pay attention to DIN 180, Earthworks and DIN 4124, A benching at the slope shoulder prevents the intrusion Excavations and trenches of surface water Slope shoulder with unloaded stripe A stepped slope increases the interconnection of the Prevent slope from drying out and from soaking backfilling with the excavation wall Softening of the slope needs to be avoided at any costs Falling protection Falling protection 1 m 1 m 1 m 1 m 0,8 m 0,5 m 3,75 m 1,1 m Wall declination max. 10:1 1:1,5 iggtecx gabion separator max. 150 g/m² Drainage min. DN 100 Excavation according to guidelines of geotechnical engineer Base according to static requirements Deepening eventually required for soils that are not frost-protected 6

7 Filling with stone material Use only pressure-stable, frost and weather resistant material Mesh spacing and rock size need to be adjusted ( cm maximum side length) Mechanical filling or filling by hand for visible sites (similar to dry wall) Two to three different rock sizes per basket Between the layers 2-3 cm leveling course made of crushed stones 32/56 mm or similar Minimize voids Correct outstanding stones at visible surfaces Filling with soil and ground material (only with proof of internal stability according to the German FGSV fact sheet for retaining structures manufactured using concrete elements, stacked blocks and gabions) Lining of the gabion with geocomposite mattresses e.g. iggtecx K-100-V. Filling with soil or ground material (e.g. when using gabions for noise protection) exclusively with coarse soil having a mineral content of at least % (according to DIN and 18915). Especially when filling and compressing, the exterior walls of the gabions need to be secured to prevent any kind of deformation. 7

8 Type static Ground slope behind wall b = 0 degrees (ground starting at 50 cm behind leading edge of the wall) Gabion wall cross section at specified height and following basics: Gabion Filling density >=17 kn/cbm Soil parameters Soil density behind wall g = 19 kn/cbm Friction angle j = degrees Wall friction angle d = degrees (2/3* j ) Cohesion c = 0 kn/qm No groundwater Max. soil pressure s <= 125 kn/qm Proof from land register is required! Gravel base course h>= cm / Protrusion ü>=25 cm To reach the individually required freezing depth, the gravel is filled in layers and each layer is being compressed! Preferably a concrete bed (C16/ XC2, h~10cm) is being used in between the upper edge of the gravel and the lower edge of the baskets. Working load behind wall p<= 5.00 kn/qm Even slight deviations from these basics require a reevaluation of the gabion wall! Inner stability of the wall needs specific proof! An inclination of the wall towards the slope or offsetting the baskets toward the slope results in higher stability respectively in an eventually reduced cubature of the wall! We recommend placing the walls with an inclination of 3-5 degrees against the backfilling! 8

9 Type static Ground slope behind wall b = 0 to 15 degrees (ground starting at 50 cm behind leading edge of the wall) Gabion wall cross section at specified height and following basics: Gabion Filling density >=17 kn/cbm Soil parameters Soil density behind wall g = 19 kn/cbm Friction angle j = degrees Wall friction angle d = degrees (2/3* j ) Cohesion c = 0 kn/qm No groundwater Max. soil pressure s <= 125 kn/qm Proof from land register is required! Gravel base course h>= cm/protrusion ü>=25 cm To reach the individually required freezing depth, the gravel is filled in layers and each layer is being compressed! Preferably a concrete bed (C16/ XC2, h~10cm) is being used in between the upper edge of the gravel and the lower edge of the baskets. Working load behind wall p<= 5.00 kn/qm Even slight deviations from these basics require a reevaluation of the gabion wall! Inner stability of the wall needs specific proof! An inclination of the wall towards the slope or offsetting the baskets toward the slope results in higher stability respectively in an eventually reduced cubature of the wall! We recommend placing the walls with an inclination of 3-5 degrees against the backfilling! 9

10 Type static Ground slope behind wall b = 15 to 27.5 degrees (ground starting at 50 cm behind leading edge of the wall) Gabion wall cross section at specified height and following basics: Gabion Filling density >=17 kn/cbm Soil parameters Soil density behind wall g = 19 kn/cbm Friction angle j = degrees Wall friction angle d = degrees (2/3* j ) Cohesion c = 0 kn/qm No groundwater Max. soil pressure s <= 125 kn/qm Proof from land register is required! Gravel base course h>= cm/protrusion ü>=25 cm To reach the individually required freezing depth, the gravel is filled in layers and each layer is being compressed! Preferably a concrete bed (C16/ XC2, h~10cm) is being used in between the upper edge of the gravel and the lower edge of the baskets. Working load behind wall p<= 5.00 kn/qm Even slight deviations from these basics require a reevaluation of the gabion wall! Inner stability of the wall needs specific proof! An inclination of the wall towards the slope or offsetting the baskets toward the slope results in higher stability respectively in an eventually reduced cubature of the wall! We recommend placing the walls with an inclination of 3-5 degrees against the backfilling! 10

11 Type overview Type 555 (LBH 0.5 x 0.5 x 0.5 m) Gitter: 0.5x0.5 x 6 x 5 Spirale: 100cm x 0 x 0 50cm x 12 x 8 Distanzhalter: 100cm x 0 x 0 50cm x 2 x 2 Type 551 (LBH 0.5 x 0.5 x 1 m) Type 515/155 (LBH 0.5 x 1 x 0.5 m 1 x 0.5 x 0.5 m) Gitter: 1x0.5 x 4 x 4 0.5x0.5 x 2 x 1 Spirale: 100cm x 4 x 4 50cm x 8 x 4 Distanzhalter: 100cm x 0 x 0 50cm x 2 x 2 Type 151/511 (LBH 1 x 0.5 x 1 m 0.5 x 1 x 1 m) 11

12 Type overview Type 115 (LBH 1 x 1 x 0.5 m) Type 111 (LBH 1 x 1 x 1 m) Gitter: 1x1 x 2 x 2 1x0.5 x 4 x 3 Spirale: 100cm x 8 x 6 50cm x 4 x 2 Distanzhalter: 100cm x 0 x 0 50cm x 4 x 4 Type 1555 (LBH 1.5 x 0.5 x 0.5 m) Type 1551 (LBH 1.5 x 0.5 x 1 m) x Gitter: 1.5x0.5 x 4 x 4 Gitter: 1.5x1 x x0.5 x 2 x 2 0.5x0.5 x 2 x 1 1x0.5 x 2 x 1 Spirale: 100cm x 4 x 4 50cm x 12 x x 6 6 x 6 0 x 0 Spirale: 100cm x 50cm x Distanzhalter: 100cm x 0 x 0 100cm x 50cm x 3 x 3 Distanzhalter: 50cm x 6 x 6

13 Type 1515 (LBH 1.5 x 1 x 0.5 m) Gitter: 1.5x1 x 2 x 2 1.5x0.5 x 2 x 2 1x0.5 x 2 x 1 Spirale: 100cm x 8 x 6 50cm x 8 x 6 Distanzhalter: 100cm x 2 x 2 50cm x 4 x 4 Type 1511 (LBH 1.5 x 1 x 1 m) Type 255 (LBH 2 x 0.5 x 0.5 m) Gitter: 2x0.5 x 4 x 4 0.5x0.5 x 2 x 1 Spirale: 100cm x 8 x 8 50cm x 8 x 4 Distanzhalter: 100cm x 0 x 0 50cm x 5 x 5 50 Type 251 (LBH 2 x 0.5 x 1 m) Gitter: 2x0.5 x 2 x 2 2x1 x 2 x 2 1x0.5 x 2 x 1 Spirale: 100cm x 12 x 10 50cm x 4 x 2 Distanzhalter: 100cm x 0 x 0 50cm x 10 x 10 13

14 Type overview Type 215 (LBH 2 x 1 x 0.5 m) Gitter: 2x0.5 x 2 x 2 2x1 x 2 x 2 1x0.5 x 2 x 1 Spirale: 100cm x 12 x 10 50cm x 4 x 2 Distanzhalter: 100cm x 2 x 2 50cm x 4 x 4 Type 211 (LBH 2 x 1 x 1 m) Gitter: 1x1 x 2 x 1 2x1 x 4 x 4 Spirale: 100cm x 16 x 12 50cm x 0 x 0 Distanzhalter: 100cm x 4 x 4 50cm x 8 x 8 14

15 Parts list Type dimensions in cm Basket 0 x 100 Number of grid mat per gabion 0 x x x x x x 50 Number of spiral binders Number of spacers x 50 x x 50 x x 100 x x 100 x x 50 x x 50 x x 100 x x 100 x x 50 x x 50 x x 100 x x 100 x x 50 x x 50 x x 100 x x 100 x 100 Beginning Following Beginning Following Beginning Following Beginning Following Beginning Following Beginning Following Beginning Following Beginning Following Beginning Following Beginning Following Beginning Following Beginning Following Beginning Following Beginning Following Beginning Following Beginning Following

16 Internationale Geotextil GmbH Member of Roess Nature Group Am Bahnhof Twistringen Germany Tel. +49 (0) Fax +49 (0) Vor der Lake Schmallenberg Germany Tel. +49 (0) Fax +49 (0)