Suitability of base rocks to construction of dam on tharthar valley/ Hadher city, based on ( RMR,DMR)

Rashid Abood, Mohammed; Ismail Husien, Amera; Saeed Mohammed, Majid

	Suitability of base rocks to construction of dam on tharthar valley/ Hadher city, based on ( RMR,DMR)
Tikrit Journal of Pure Science
Article 1, Volume 18, Issue 1, 2013, Pages 212-220
Authors
Mohammed Rashid Abood; Amera Ismail Husien; Majid Saeed Mohammed
Abstract
The study aims at carrying to engineering geological evaluation of the foundation rocks in Wadi –Altharthar, near Hather government (city) (North west of Iraq ), and their suitability for construction of a dam for water storage in flood season, for multi purposes like the agricultural and recharge of groundwater, The study involves geological and engineering-geological map at a scale (1:100000) according to ( Anon,1977 and Hawkins,1986) and prepare engineering geological map at a scale ( 1:100000) also include Geotechnical evaluation of the rock masses by testing core samples from bore holes along to axis of the proposed dam , and outcrops samples .The area rocks consist of two engineering geological units on the basis of unconfined compressive strength the first is very weak and the second is moderately weak .The field and laboratory tests revealed that quality of gypsum, limestone rocks are good for bearing capacity of stresses resulted from the weight of the dam. Some remedial measures were proposed to prevent the leakage of water through the foundation rocks of the dam to avoid the damage the dam, because the presence of soluble rocks under the dam body. Such the problem must be treated by grouting and drilling a trench of dimensions (0.5 m width , 14.5m depth and 1400 m length ) in gypsum bed.

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