Study the differential settlement problem of al-shamiya barrage in the South of Iraq

مقدم أطروحة جامعية

al-Khafaji, Hazim Muhammad Karim

مشرف أطروحة جامعية

Alwash, Haydar Hamzah
Matuq, Jafar Sadiq

الجامعة

الجامعة التكنولوجية

الكلية

-

القسم الأكاديمي

قسم هندسة البناء و الإنشاءات

دولة الجامعة

العراق

الدرجة العلمية

ماجستير

تاريخ الدرجة العلمية

2013

الملخص الإنجليزي

The research aims is to study the differential settlement occurring at Al-Shamiya barrage in the south of Iraq and comparing safety limits, and suggest appropriate treatments of those problems.

Governing consists of the main origin containing three units each unit contains two gates of the radial type and two structures corridor fish left and right in addition to the barrage issued on both sides of the governing provider (not work with them).

The two-dimensional model based on the finite elements specified (Geo-slope model) have been used to analyze seepage under the basis of governing and expense stability, against uplift pressure, it was found that the values obtained are not safe in some default cases and safe for design state of the barrage.

Which refers to the nature of the leak under the origin is not one of the reasons leading to the problems affecting the governing.

The estimation of suspended sediment load was calculated, also along a reach 2287 m from barrage towards upstream.

The sampling of mixture Water-Sediment and riverbed samples are taken by measuring devices made for the purposes of this study, while hydraulic data have been gated by using Acoustic Doppler Current Profile.

The analysis indicated that the main reason of sediment deposition near the barrage were due to bank erosion and derived from bends located at a distance of (912) m and distance (2287) m.

That leads to the accumulation of about 2200 tons of sediment on the bays and near the gates resulting un excessive loads over that recommended by a designer by approximately 26% of design load.

This effects was observed in surveillance and monitoring report, because the undesirable settlement that occur in barrage under the supervision of the Office of Scientific Services and the Advisory University of Qadisiyah in 2012 and has been in monitoring horizontal stations distributed on the body of Al-Shamiya barrage using station hardware integrated (Total Station) and using the method of Micro Triangulation, as well as monitoring coordinates sites vertical (elevation) using measuring device elevations type (Ziess Ni002).

Through the results of the monitoring points for eight months show a regular settlement in the first and second months of surveillance, and no movement have been monitored during other months for any of the points and the stability of the water level relative to the observations.

This situation can be attributed to removing the sediment that were deposited at the barrage bays by the Office of Executing Rivers Dredging Works, thereby its influence diminished during the monitoring period.

Finally, as a result of vibration readings, using (VIBRATION METER VT:8204), that were recorded with sudden releases indicated that the barrage is safe against vibration where these readings (0.6-0.65)mm/s located within a recommended limits (1.8 mm/s) establish by ISO 2372.

In this study suggested to use spur dike structures which be the treatment for bank protection have been proposed to the problems at hand for river meandering located at specified positions those having an influence on sediment transport towards the barrage to stop a progression of bank erosion.

As result, thereby, decreases unfavorable deposition at barrage bays.

التخصصات الرئيسية

العلوم الهندسية والتكنولوجية (متداخلة التخصصات)

الموضوعات

• العراق

• APA
• MLA
• AMA

لغة النص

الإنجليزية

نوع البيانات

رسائل جامعية

رقم السجل

BIM-417923