H Result of Soil Investigation
Total Page:16
File Type:pdf, Size:1020Kb
The Project for the Improvement of Water Supply, Sewerage and Drainage System in Yangon City Vol IV Water Supply System Feasibility Study, Appendix H RESULT OF SOIL INVESTIGATION GEOLOGY OF YANGON AREA The geology of Yangon area was classified into the following geological units: (a) Quaternary deposits - 4. Upper Delta Alluvium, Pleistocene and Recent - 3. Lower Delta Alluvium, Pleistocene (b) Tertiary deposits - 2. Irrawaddian Series, Pliocene - 1. Pegu Series, Oligocene-Miocene The regional geological study has been made in an area which includes ridges and deltaic lands lying south of the Bago Yoma. This area is in a north-south trending synclinal basin containing a thick Tertiary - Quaternary deposits. The Tertiary deposits are strongly folded into narrow en-echelon anticlinal folds such as the ridge, which is trending south towards the Gulf of Martaban. The rocks of the Tertiary age contain well-consolidated marine sandstone and shales of the Pegu Group and semi-consolidated, continental deltaic and marginal marine (?) deposits of the Irrawaddy Formation. The synclinal valley west of the Yangon anticlinal ridge is filled with unconsolidated water laid deposit of Quaternary age. These form a wedge shaped alluvial accumulation ranging in thickness from a few meter near the ridge about 60 to 90 meter in the valley. These sediments include clays, silts, sands and predominantly fine to coarse gravels. The Boreholes Location Points with the geological Map of Yangon area is presented as following. ● East Dagon BH‐1~5 ●North Dagon BH‐1 ●South Dagon BH‐1 Bago River Right Bank BH‐1 ● ● ●Bahan BH‐1 Bago River Left Bank BH‐1 ●Dagon BH‐1 ●Botataung BH‐1 Source: Myint Lwin Thein et al., 1972 The Boreholes Location Points with the Geological Map of Yangon Area H-1 Bahan BH-1 for Kokine Service Reservoir 3.0 LOCATION OF THE PROJECT SITE The proposed site of The Improvement Of Water supply is situated near San Chuan Restaurant, Bahan Township, Yangon Division. The location of project site is shown in Fig. (1) . Fig. (1) Location Map of the Project Area 4.0 METHODS OF INVESTIGATION Wash boring method up to the depth of 30m and sampling program of 1m up to depth of 30m intervals were specified. Borehole sounding test or Standard Penetration Test was performed in accordance with ASTM-D1586 standard. Bore logging and visual soil classification were made. The ground water table was measured and recorded. The soil profile and its corresponding SPT-N values are graphically presented in this report. It is compiled with the lab test result on the disturbed but representative samples. 5.0 GEOLOGY OF YANGON AREA The geology of Yangon area was classified into the following geological units: (a) Quaternary deposits - 4. Upper Delta Alluvium, Pleistocene and Recent - 3. Lower Delta Alluvium, Pleistocene (b) Tertiary deposits - 2. Irrawaddian Series, Pliocene - 1. Pegu Series, Oligocene-Miocene 2 H-2 SOIL INVERSTIGATION LOG Type of Hammer : Automatic Sheet 1 of 3 Project : The Improvement Of Water Supply Boring Started : 23 . 3 . 2013 Hole No : 1 Location : Bahan Township Boring Completed : 25 . 3 . 2013 Total Depth (m) : 30 m Coordinates : N-1860987.90,E-197174.6 Logged by : Phyo Ko Ko Oo Water Level (m) : 7.95 m Elevation (m) : 37.63 m Checked by : Wai Phyo Aung Driller : Than Maung Field Bearing SPT capacity calculated Soil Description (N-Value) from SPT value (Ton/ft2) 1 36.63 19 1.71 Reddish brown, firm to very firm, Clayey SILT with lateritic soil 2 35.63 10 0.90 ( 0.0 m ~ 3.5 m ). 3 34.63 3.00 26 2.34 4 33.63 28 2.52 Reddish brown, very firm, Clayey SILT with lateric soil ( 3.5 m ~ 5.5 m ). 5 32.63 21 2.14 Gray and yellowish brown, 6 31.63 6.00 1.84 very firm, Silty CLAY 18 ( 5.5 m ~ 6.5 m ). Gray, firm, Silty CLAY 7 30.63 12 1.37 ( 6.5 m ~ 7.5 m ). 8 29.63 UD Gray, Silty CLAY ( 7.5 m ~ 10.0 m ). 9 28.63 9.00 UD 10 27.63 47 5.36 Type of Sample Strength of Consistency of Cohesive Soils Density of Cohesionless Soils <2 Very Soft <4 Very Loose Undisturbed Sample 2 - 4 Soft 4 - 10 Loose Sand Disturbed Sample (Split spoon) 4 - 8 Medium 10 - 30 Medium Dense 8 - 15 Firm 30 - 50 Dense Rock Sample 15 - 30 Very Firm >50 Very Dense >30 Hard H-3 SOIL INVERSTIGATION LOG Type of Hammer : Automatic Sheet2 of 3 Project : The Improvement Of Water Supply Boring Started : 23 . 3 . 2013 Hole No : 1 Location : Bahan Township Boring Completed : 25 . 3 . 2013 Total Depth (m) : 30 m Coordinates : N-1860987.90,E-197174.6 Logged by : Phyo Ko Ko Oo Water Level (m) : 7.95 m Elevation (m) : 37.626 m Checked by : Wai Phyo Aung Driller : Than Maung Field Bearing SPT capacity calculated (N-Value) Soil Description from SPT value (Ton/ft2) 11 26.63 39 4.68 12 25.63 12.00 28 3.36 Yellowish brown, medium dense to dense, Silty SAND with a little amount of Clay ( 10.0 m ~ 20.0 m ). 13 24.63 23 2.76 14 23.63 34 4.08 15 22.63 15.00 31 3.72 16 21.63 30 3.60 17 20.63 32 3.84 Yellowish brown, medium dense to dense, Silty SAND with a little amount of Clay ( 10.0 m ~ 20.0 m ). 18 19.63 18.00 36 4.32 19 18.63 37 4.44 20 17.63 20.00 39 4.68 Type of Sample Strength of Consistency of Cohesive Soils Density of Cohesionless Soils <2 Very Soft <4 Very Loose Undisturbed Sample 2 - 4 Soft 4 - 10 Loose Sand Disturbed Sample (Split spoon) 4 - 8 Medium 10 - 30 Medium Dense 8 - 15 Firm 30 - 50 Dense Rock Sample 15 - 30 Very Firm >50 Very Dense H-4 SOIL INVERSTIGATION LOG Type of Hammer : Automatic Sheet3 of 3 Project : The Improvement Of Water Supply Boring Started : 23 . 3 . 2013 Hole No : 1 Location : Bahan Township Boring Completed : 25 . 3 . 2013 Total Depth (m) : 30 m Coordinates : N-1860987.90,E-197174.6 Logged by : Phyo Ko Ko Oo Water Level (m) : 7.95 m Elevation (m) : 37.626 m Checked by : Wai Phyo Aung Driller : Than Maung Field Bearing SPT capacity calculated (N-Value) Soil Description from SPT value (Ton/ft2) 21 Reddish brown,dense, 16.63 21.00 38 4.56 Silty SAND with a little amount of Clay ( 20.0 m ~ 22.5 m ). 22 15.63 40 4.80 23 14.63 >50 >5 24 13.63 24.00 >50 >5 25 12.63 >50 >5 26 11.63 >50 >5 Yellowish brown,very dense, Silty SAND ( 22.5 m ~ 30.0 m ). 27 10.63 27.00 >50 >5 28 9.63 >50 >5 29 8.63 >50 >5 30 7.63 30.00 >50 >5 Type of Sample Strength of Consistency of Cohesive Soils Density of Cohesionless Soils <2 Very Soft <4 Very Loose Undisturbed Sample 2 - 4 Soft 4 - 10 Loose Sand Disturbed Sample (Split spoon) 4 - 8 Medium 10 - 30 Medium Dense 8 - 15 Firm 30 - 50 Dense Rock Sample 15 - 30 Very Firm >50 Very Dense H-5 SOIL TEST RESULTS Project : The Improvement of Water Supply Project Date : 24-4-2013 Location : Bahan , Yangon Borehole No : BH-1 Grain Size Analysis Atterberg Limit Triaxial Consolidation Test Compression Test Description of Soil Gravel Sand Silt Clay (L.L) (P.L) ( P. I ) Pre- content Moisture U C S Test Sr; No, Depth ( m ) C Dry density Bulk densityBulk Ratio ( e ) Ratio Pressure ( Pressure Initial Void Initial Void Index ( Cc ) Index Specific gravity consolidation consolidation Compression Compression Fr To ( % ) ( % ) ( % ) ( % ) ( % ) ( % ) ( % ) ( % ) g/cm3 g/cm3 kg/cm2 ( ° ) kg/cm2 kg/cm2 Reddish Brown colour, very firm 1 1.00 1.45 ,Clayey Silt and sand (Lateritic 2.56 0.00 46.20 53.80 33.91 16.50 17.41 19.7 2.03 1.69 0.30 11.00 0.41 soil) . H-6 Reddish Brown colour, very firm 2 3.00 3.45 ,Clayey Silt and sand (Lateritic 2.56 0.00 41.84 58.16 41.45 21.46 19.99 24.00 2.00 1.61 0.42 14.00 0.53 soil) . Gray colour, very firm ,Silty 85.60 3 6.00 6.45 CLAY with alittle amount of sand . 2.51 0.00 14.40 35.89 19.38 16.51 18.7 1.94 1.63 0.32 8.00 0.38 Gray colour, firm , with Silty CLAY 97.40 4 7.00 7.45 trace amount of Sand . 2.48 0.00 2.60 45.88 26.07 19.81 29.17 1.96 1.52 0.31 5.00 0.44 Gray colour, Silty CLAY with 5 8.00 9.00 trace amount of Sand . 2.50 0.00 4.68 95.32 40.51 22.00 18.51 30.50 1.89 1.45 0.35 5.00 0.36 0.83 2.60 0.27 Reddish Brown colour, Silty 6 9.00 10.00 CLAY with trace amount of Sand 2.52 0.00 7.54 92.46 41.31 23.48 17.83 31.70 1.88 1.43 0.32 6.00 0.34 0.86 2.20 0.26 . SOIL TEST RESULTS Project : The Improvement 0f Water Supply Project Date : 24-4-2013 Location : Bahan , Yangon Borehole No : BH-1 Grain Size Analysis Atterberg Limit Triaxial Consolidation Test Compression Test Description of Soil Gravel Sand Silt Clay (L.L) (P.L) ( P.