Flexible couplings. Housing Developments radiated further away from the CBD into questionable soils.

Transcription

1 Flexible couplings Housing Developments radiated further away from the CBD into questionable soils DRAINAGE REQUIREMENTS AS & AS

2 THE MAIN PRODUCTS Housing Developments radiated further away from the CBD into questionable soils. Swivel Expansion Joint 100mm DWV +/- 50mm Expansion Expander Joint 100DWV 150 mm linear expansion 50mm

3 Copper Sulphate Crystals coated section Dust Protection Tape 3

4 THE COMBO BEND - 100mm MOVEMENT 30degree DEFLECTION 4

5 THE COMBO STRAIGHT - 100mm MOVEMENT 30 degree DEFLECTION 5

6 STHE BAZOOKA 500 mm MOVEMENT 6

7 THE RANGE from 50 mm MOVEMENT to suit ALL - ys - requirements A PROTECTED DRAIN Concrete slab. The Two Swivels combined allow 100mm lateral slab movement. Lagging to suit soil rating [25mm for H or 40mm for P] Expanda protecting IO junction from twisting action caused by slab movement Swivel to protect against slab movement Swivel to protect IO junction Expanda to protect IO junction & Drain junction Expanda protecting drain junction 75mm (150mm Total) Expanda protecting drain junction from twisting 7

8 ARTICULATION MOVEMENT SWIVEL MOVEMENT...IN PRACTICE TOP VIEW SIDE VIEW 500mm 500mm By using a combination of Swivel Joints all reactive soil movements can be remedied. 295mm 295mm 15 deg. 15 deg. With one Swivel, at a deflection of 15 degrees either side of centre, over a length of 500mm, the Swivel unit allows 295mm of horizontal and vertical movement. TOP VIEW 500mm 500mm 400mm 920mm SIDE TO SIDE 15 deg. With two Swivels, at a deflection of 15 degrees either side of centre, over a length of approx. 1000mm, the Swivel units allow a pipe deflection of 400mm to 920mm, of horizontal and vertical movement. SCALE - 1:17.85 SIDE VIEW 15 deg. 500mm 295mm 400mm 920mm UP VERTICAL MOVEMENT DOWN Some applications may only need one, but to have the articulation effect..ie enable misalignment without stressing pipeline, two are required. 8

9 UNRESTRICTED NON FLEXIBLE AREAS INSTALL The result of bottom heave. 9

10 CREEP & SLIP Bazooka applications 10

11 Now linked to AS3500 and part of the Plumbers code 11

12 As is the most radical change to interpreting Soils and House Engineering we have seen since 1986 and several trades will need to update their current knowledge. 12

13 AS Drainage Requirements Section 1. The site classification shall be stated on the drawings. The selected footing system and any required site work and required site drainage shall be documented. 13

14 MOVING INTO REACTIVE SOILS Housing Developments radiated further away from the CBD into questionable soils. In the greater Melbourne area, Housing developments expand further into areas of REACTIVE SOILS. 14

15 MOVING INTO REACTIVE SOILS Housing Developments radiated further away from the CBD into questionable soils. In the greater Melbourne area, 60-70% of Housing developments expand further into areas of REACTIVE SOILS. Sydney and Brisbane are similar 15

16 ITS NOT JUST FLOW!! The Grade of Fall is of great importance. Reduction from 1:60 to 1:80 in grade, and often shallower (to suit take off heights) causes materialfluid separation and congestion due to poor flow rates. Already happening. 16

17 ITS NOT JUST FLOW!! The Grade of Fall is of great importance. Reduction from 1:60 to 1:80 in grade, and often shallower (to suit take off heights) causes materialfluid separation and congestion due to poor flow rates. Already happening. SELF CLEANING FLOW IS PARAMOUNT IN REACTIVE SOILS. 17

18 FALL DISCHARGE PROBLEMS SOIL CLASSIFICATION SOIL DESCRIPTION DIFFERENTIAL MOVEMENT A Most sand & rock Zero SEWER DRAIN GRADE S Slightly reactive 0 20 mm M Moderately reactive mm H1 Highly reactive mm H2 Very Highly reactive mm E Extremely reactive 75 mm + P All other soils As Tested 18

19 FALL DISCHARGE PROBLEMS SOIL CLASSIFICATION SOIL DESCRIPTION DIFFERENTIAL MOVEMENT A Most sand & rock Zero S Slightly reactive 0 20 mm M Moderately reactive mm SEWER DRAIN GRADE 1 : 60 ( 167 mm in 10 M ) H1 Highly reactive mm H2 Very Highly reactive mm E Extremely reactive 75 mm + P All other soils As Tested 19

20 FALL DISCHARGE PROBLEMS SOIL CLASSIFICATION SOIL DESCRIPTION DIFFERENTIAL MOVEMENT A Most sand & rock Zero S Slightly reactive 0 20 mm M Moderately reactive mm H1 Highly reactive mm H2 Very Highly reactive mm SEWER DRAIN GRADE 1 : 60 ( 167 mm in 10 M ) 1 : 50 ( 200 mm in 10 M ) E Extremely reactive 75 mm + P All other soils As Tested 20

21 FALL DISCHARGE PROBLEMS SOIL CLASSIFICATION SOIL DESCRIPTION DIFFERENTIAL MOVEMENT A Most sand & rock Zero S Slightly reactive 0 20 mm M Moderately reactive mm H1 Highly reactive mm H2 Very Highly reactive mm E Extremely reactive 75 mm + P All other soils As Tested SEWER DRAIN GRADE 1 : 60 ( 167 mm in 10 M ) 1 : 50 ( 200 mm in 10 M ) 1 : 50 / 1 : 40 ( mm in 10 M ) 21

22 FALL DISCHARGE PROBLEMS 22

23 FALL DISCHARGE PROBLEMS UNDER SLAB DRAINAGE RAIN 23

24 FALL DISCHARGE PROBLEMS T T T = Bottom of Trench 24

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30 Unless otherwise specified, these joints are to be set at 50% of their sliding ability 30

31 Unless otherwise specified, these joints are to be set at 50% of their sliding ability 31

32 Perimeter to Perimeter ZERO SIDE AREA 32

33 Unless otherwise specified, these joints are to be set at 50% of their sliding ability 33

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35 The e Factor came about from the Walsh method mentioned in Appendix F In AS where movement occurs over an edge distance (e) which applies to both Edge and Centre heave on slab design. e e Centre Heave Edge Heave 35

36 The e principle points to the area of greatest potential movement of a slab on ground or waffle pad. This perimeter area is 2 to 3 mtrs inside the building footprint 36

37 Standard pipe layout This pipe layout would normally require a total of 10 Expansion Joints/Swivels in a H1/H2/E type site As per Standards AS

38 Insurance 38

39 Insurance This e principle allows a REDUCTION of Expansion units used in under slab construction in reactive soils. 39

40 MORE CONCERNS Missed! Water problems? Trench failures occur due to incorrect installation and poor compaction. The root of all problems 40

41 WHO IS RESPONSIBLE? The Owner is responsible for unbalanced garden watering.(this changes moisture balance) HEAVE 41

42 MORE MOVEMENT 42

43 MORE MOVEMENT Oh dear, something s moving.. 43

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46 THIS CONDEMNED! 46

47 DRAINAGE CHOICES 47

48 DRAINAGE CHOICES 48

49 DRAINAGE CHOICES 49

50 DRAINAGE CHOICES Ready to pour...ready to break 50

51 INTIMATE EDGEBEAM PIPEWORK WITHOUT ANY TOLERANCE BUILT IN PROBLEMS 51

52 INTIMATE EDGEBEAM PIPEWORK WITHOUT ANY TOLERANCE BUILT IN PROBLEMS 52

53 Now incorporates Flexible Couplings in Sewer and Stormwater installations in Reactive soils 53

54 AS DRAINAGE REQUIREMENTS 54

55 Boundry Line RETENTION WALL DRAINAGE Fall Pits Approx 1200 min SPOON DRAINS Non dispersive subsoil Grate cover on top of PPE RETAINING WALL DWELLING Fall SwivelJoints refer to Storm Plastics Granulated compacted free draining backfill material (min 10mm Ø) Grate cover on top of PPE 100mm Ø pipe Fall Fall Proposed 90 UPVC pipe Ag pipe covered with geotextile material with manufacturers spec to be connected to legal point of discharge in drainage system Concrete Ag pipe covered with goetextile material or approved strip drain in accordance with manufactures specifications to be connected to legal point of discharge of drainage system. Swivel Joints / Expanda Joints Refer to Storm Plastics Information courtesy by D Lopes 55

56 Boundry Line RETENTION WALL DRAINAGE Fall Pits Approx 1200 min SPOON DRAINS Non dispersive subsoil Grate cover on top of PPE RETAINING WALL DWELLING Fall SwivelJoints refer to Storm Plastics Granulated compacted free draining backfill material (min 10mm Ø) Grate cover on top of PPE 100mm Ø pipe Fall Fall Proposed 90 UPVC pipe Ag pipe covered with geotextile material with manufacturers spec to be connected to legal point of discharge in drainage system Concrete Ag pipe covered with goetextile material or approved strip drain in accordance with manufactures specifications to be connected to legal point of discharge of drainage system. Swivel Joints / Expanda Joints Refer to Storm Plastics Information courtesy by D Lopes 56

57 Boundry Line RETENTION WALL DRAINAGE Fall Pits Approx 1200 min SPOON DRAINS Non dispersive subsoil Grate cover on top of PPE RETAINING WALL DWELLING Fall SwivelJoints refer to Storm Plastics Granulated compacted free draining backfill material (min 10mm Ø) Grate cover on top of PPE 100mm Ø pipe Fall Fall Proposed 90 UPVC pipe Ag pipe covered with geotextile material with manufacturers spec to be connected to legal point of discharge in drainage system Concrete Ag pipe covered with goetextile material or approved strip drain in accordance with manufactures specifications to be connected to legal point of discharge of drainage system. Swivel Joints / Expanda Joints Refer to Storm Plastics Information courtesy by D Lopes 57

58 FLEXIBILITY? Although a good alternative to replacing and excavating entire drains, relining, by design, does not allow for any movement in any reactive soils. Expansion and Swivel Joints are necessary for this method. 58

59 What s the problem? 59

60 WHAT DOES STANDARDS SAY? LAGGING: Must be.a) Non-absorbent b) very flexible c) the right thickness This means a minimum of 20mm thick on H1 Soils And..a minimum of 40mm thick in H2 and E Soils 60

61 LAGGING CARPET UNDERLAY? NO. 25mm Styrene is used as a simple method but is available in only one thickness and has minimal compressibility resulting in high stress-transfer to junctions Layers Closed Cell Polyethylene lagging can be layered to provide 20mm on highly reactive sites or 40mm if in extremely reactive areas. Benefits of high compressibility results in reduced stresstransfer to junctions. 61

62 REACTIVE SOILS IMPACT 62

63 REACTIVE SOILS IMPACT 63

64 REACTIVE SOILS IMPACT 64

65 DEEP REPAIR 65

66 PROTECTED SYSTEM 66

67 SLIPPED. 67

68 Drainage construction alternative: All underslab drainage systems could be tied into the slab. All movement can then be accommodated OUTSIDE the building with one Joint. Slab Support Suspension strap (imbedded in slab) Porous Filled Trench Clay plug (as per Clause (b) & (c) AS On Grade.. 68

69 SUSPENDED DRAINAGE DRAINAGE SUSPENSION 69

70 SUSPENDED DRAINAGE DRAINAGE SUSPENSION 70

71 RESTRICTED ACCESS INSTALL 71

72 TREES ARE CLEVER 72

73 Additional Tree planting, after handover, is the responsibility of the Owner.(This changes the block s soil ratings) 73

74 Roots can penetrate Rubber Sleeve Joints with serious consequences. 74

75 RUBBER SLEEVES PERCEIVED EXPANSION JOINTS DON T EXPAND Expanded 75

76 AS DRAINAGE REQUIREMENTS Clause (a)..the drainage system shall be completed by the finish of the construction of the building (b)the base of trenches shall be sloped away from the building. Trenches shall be backfilled with clay in the top 300 mm within 1.5m of the building 76

77 PLUMBING IN REACTIVE SOILS.. 77

78 INSPECTION CHAMBERS ARTICULATED MOVEMENT Where Differential Settlement may occur and the drain passes through the wall of an inspection chamber over 1 m deep, two flexible joints SHALL be provided on the drain adjacent to the wall. The length of the drain between the two flexible joints SHALL not exceed 600mm (see Fig 4.5) 78

79 RURAL CREEP Applications APPLICATIONS : H2 / E Class and or SLIP SITES AS is the most radical change to interpreting soils and house engineering we have seen sin ce 1986 and several trades will need to know what is in it and how to apply it. Drains that are located and fixed to the House frames also require Mechanical Flexible Joints as per AS/NZS PLAN Expansion Joints shall also be used when the pipes exit the building perimeter, and only then if in reactive soils. See drawing SP 105A for further details. Ground Level Reactive Soils ELEVATION All drains supported or bracketed to underside of House See drawing SP 105A for AS/NZS requirements. Twin Swivels allow for articulated movement. Reactive Soils Expansion and Swivel Joints every 6 Mtrs to handle 10mm slip per rain event. Total movement = 150mm. (+/- 75mm) WP Trentini Articulated Movement SOIL MOVEMENT OR SLIP.. SWIVEL JOINT (with 50mm Expansion each) CODE :SJ10015 Reactive Soils Manufactured under a quality system certified as complying with ISO 9001 by an accredited certification body This Swivel cushions potential soil movement pressure on the 90 elbow caused initially by the trench grade. Please refer to Storm Plastics Table No. SP 1 for additional details on flow gradients and installation Drawing No.SP 105 SOIL CLASSIFICATION Class - P : AS Residential Installation Guide ONLY for use of AS/NZS Mechanical Expansions Joints in Reactive Soils. COMPANY STORM PLASTICS (SA) Pty Ltd GRADE 1:50 / 1:40 ( mm Fall in 10 Mtrs) PIPE MATERIAL Poly Vinyl Chloride - PVC March 2012 Trench Grade NOT DRAWN TO SCALE Land Slip or Creep 79

80 RURAL CREEP Applications APPLICATIONS : H2 / E Class and or SLIP SITES AS is the most radical change to interpreting soils & house engineering we have seen since 1986 and several trades will need to know what is in it and how to apply it. AS/NZS Clause Provision for Expansion and contraction. Downpipes do not normally need special provision for expansion and contraction. However, when a downpipe is connected to a Stormwater pipe, or otherwise restrained at the discharge end, provisions shall be made Downpipe to allow the pipe to expand and contract WP Trentini Ground Level Articulated Movement Reactive Soils AS/NZS , Clause 2.3 : Hangers and Clips: Hangers and Clips shall be corrosion resistant for the intended environment. Sliding Joints, pipe hangers and clips shall be constructed so that, when fully tightened, longitudinal movement of the pipe is possible without damage to the pipe or fitting. Anchor clipsfor fixed points shall be constructed so that, when fully tightened, the fitting or pipe is securely and evenly clamped to prevent movement. Care shall be taken to ensure that pipes and fittings are not distorted by over tigh tening. SOIL MOVEMENT OR SLIP.. SWIVEL JOINT (with 50mm Expansion) CODE :SJ10015 Reactive Soils 2 M+ Fixed Point Clause Vibration Vibration of the pipe (e.g. at connections to water pumps) shall be avoided and where necessary, flexible couplings shall be installed to minimize transmission of vibration to the pipe work. Clause (g) Solvent Cement Jointing Allow the joints to cure for 24hrs. Do not fill the pipeline with water until at least 1 h after making the last joint. Do not pressurize for at least 24 h after making the last joint. Expanda Joints DW AS/NZS Clause (a) Expansion joints provided where distance between fixed points exceed 2 metres (cold pipelines) ELEVATION Fixed Point Expanda Joint DW Manufactured under a quality system certified as complying with ISO 9001 by an accredited certification body Pipe Insert AS/NZS Clause (a) Expansion Joint at connection to stack Please refer to Storm Plastics Table No. SP- 1 for additional details on flow gradients and installation Drawing No.SP 105A SOIL CLASSIFICATION Fixed Points AS/NZS Cla (b) Expansion Joint at change of direction in graded lines. Twin Swivels allow for articulated movement. Reactive Soils This Swivel cushions potential soil movement pressure on the 90 elbow caused initially by the trench grade. Class - P : AS Residential Installation Guide ONLY for use of AS/NZS Mechanical Expansions Joints in Reactive Soils. COMPANY STORM PLASTICS (SA) Pty Ltd GRADE 1:50 (200mm Fall in 10 Mtrs) PIPE MATERIAL Poly Vinyl Chloride - PVC March 2012 AS/NZS Clause Provision for Expansion and Contraction Expansion and Swivel Joints every 6 Mtrs to handle 10mm slip per rain event. Total movement = 150mm. (+/- 75mm) Trench Grade NOT DRAWN TO SCALE Land Slip or Creep 80

81 Is this a plumbing Problem?? Recent collapse 81

82 Sodic Soil + Plumbing leaks + heavy rainfall = Disaster Recent collapse Guatemala City: April, m wide x 100m deep. Major contribution was heavy rain and poor plumbing 82

83 60 to 70% of Residential housing, in Victoria and the Greater New South Wales area are currently being built on REACTIVE SOILS. Drainage problems will increase maintenance costs if AS and AS regulations are not followed. 83

84 ENGINEERS AUSTRALIA STH WEST GROUP - VICTORIA