Evaluation of the tender results of forest road constructions: A case study in Bolu Regional Directorate

Yılmaz Türk; Selcuk Gumus

doi:10.17099/jffiu.292012

Araştırma Makalesi

Orman yol inşaatı ihale sonuçlarının değerlendirilmesi: Bolu Bölge Müdürlüğü örneği

Yıl 2017, Cilt: 67 Sayı: 2, 201 - 209, 01.07.2017

Yılmaz Türk , Selcuk Gumus

https://doi.org/10.17099/jffiu.292012

Öz

Evaluation of the tender results of forest road constructions: A case study
in Bolu Regional Directorate

Abstract: The construction of forest roads is
realized by tenders by the General Directorate of Forestry. The amount of work
on the approximate cost schedule required for the tender is determined
according to the 1st discernment measurements made during the road application.
Unexpected disputes have been occurred in the process of finalizing the
contracts by measurements of the preliminary survey, without the detailed
project is prepared. The aim of this study is to compare the road construction
data that are calculated while going out to the tender and the exact values
that are occurred as a result of the construction. A total of 34 forest roads
constructed by Bolu Forest Regional Directorate (BFRD) between 2007 and 2014
were sampled and studied. Data were obtained and evaluated from the tender
dossiers to compare the approximate cost of the tenders and progress values
(excavation quantities, excavation features and costs) of these projects. In
addition, these roads have been evaluated according to forest road technical
standards. According to the results of the research; the total length of the
assessed roads was 73,879 m, and the total costs were $ 977,138 and a total of
726,366 m3 of excavation was carried out for the construction of these roads.
As a result of paired sample t-tests performed; the difference between the
tender amount and the progress payment amounts and the amount of very hard rock
excavation and the approximate cost very hard rock excavation amount were found
to be statistically significant.

Keywords: Forest road construction, tender
cost, progress payment, Turkey

Orman yol inşaatı ihale sonuçlarının değerlendirilmesi: Bolu Bölge
Müdürlüğü örneği

Özet: Orman yollarının inşası, Orman Genel
Müdürlüğü tarafından ihale yoluyla gerçekleştirilmektedir. İhale için gerekli
olan yaklaşık maliyet cetvelindeki iş miktarı, yol aplikasyonu sırasında
yapılan 1. gözlemsel ölçümlere göre belirlenir. Detaylı proje hazırlanmadan, ön
araştırma ölçümleriyle sözleşmelerin tamamlanma sürecinde beklenmeyen
anlaşmazlıklar meydana gelmektedir. Bu çalışmanın amacı, ihaleye çıkılırken
hesaplanan yol inşa verileri ile inşaat sonucunda çıkan kesin değerlerin
karşılaştırılmasıdır. 2007-2014 yılları arasında Bolu Orman Bölge Müdürlüğü
(BOBM) tarafından yapılan toplam 34 orman yolu örneklenerek incelenmiştir. Bu
projelerin ihale yaklaşık maliyet ve hakediş değerlerini (kazı miktarını, kazı
özelliklerini ve maliyetleri) karşılaştırmak için ihale dosyalarından veriler
elde edilmiş ve değerlendirilmiştir. Ayrıca, bu yollar orman yolu teknik
standartlarına göre değerlendirilmiştir. Araştırma sonuçlarına göre; yolların
toplam uzunluğu 73.879 m ve toplam maliyeti 977.138 $ olup bu yolların inşası
için toplam 726.366 m3 kazı yapılmıştır. Yapılan bağımlı iki örnek t-testi
sonucunda; ihale toplam tutarı ile hakediş toplam tutarı arasındaki fark
ve hakediş çok sert kaya kazı miktarı ile yaklaşık maliyet çok sert kaya kazı
miktarı arasındaki fark istatistiksel olarak anlamlı bulunmuştur.

Anahtar Kelimeler: Orman yol inşaatı, ihale bedeli,
hakediş, Türkiye

Received (Geliş): 13.02.2017 - Revised (Düzeltme): 22.03.2017 - Accepted
(Kabul): 26.04.2017

Cite (Atıf): Türk, Y.,
Gümüş, S., 2017. Evaluation of the tender results of forest road constructions:
A case study in Bolu Regional Directorate. Journal of the Faculty of
Forestry Istanbul University 67(2): 194-202. DOI: 10.17099/jffiu.292012

Anahtar Kelimeler

Orman yol inşaatı, ihale bedeli, hakediş, Türkiye

Kaynakça

Acar, H.H., Eker M. ve Coskun, N., 2003. A Research on the Determination of the Forest Roads Graundbase Type by Terrestrial Methods. Proceeding cd of Austria, High Tech Forest Operations for Mountainous Terrain. October 5-9, Schlaegl, Austria.
Erbas, F. D. 2010. The Investigation of Approximate Cost and Progress Payment for Forest Roads to be Built on Mountainouis Terrain. MSc thesis, Karadeniz Technical University, Institute of Natural Sciences.
Erdas, O., 1997. Forest Roads I-II. Karadeniz Technical University Pres, Trabzon. (in Turkish).
Erdas, O., Acar, H.H., Tunay, M. ve Karaman, A., 1995. Forestry Work and Production in Turkey, Forest Roads, Forest Products Transportation, Mechanization in Forestry and Problems Related to Property-Cadastral and Suggested Solutions, Turkey Forestry Report, Karadeniz Technical University, Faculty of Forestry Pres, Trbazon.
FAO, 1992. Cost control in forest harvesting and road construction, FAO Forestry Paper 99, 106 pp, Rome.
Gumus, S., Turk, Y. ve Arıcak, B. 2015. Investigation of Approximate Cost and Progress Payment in Forest Road Construction Process, Kastamonu University Journal of Forestry Faculty 15 (1): 6-14.
Hasdemir, M., 1995. Cost Calculations on Forest Road networks, Journal of the Faculty of Forestry Istanbul University 45 (1-2/B): 61-72.
Karabacak, M. 2010. The Investigation of Approximate Cost and Progress Payment for Forest Roads to be Built in Lakes Region of Turkey. MSc thesis, Karadeniz Technical University, Institute of Natural Sciences.
GDF, 2008. Forest Roads Planning, Construction and Maintenance. Turkish Republic, Environment and Forestry Ministry, General Directorate of Forestry Press, Ankara. (in Turkish).
GDF, 2015. Turkish Forests. https://www.ogm.gov.tr/ekutuphane/Yayinlar/Türkiye%20Orman%20Varlığı-2015.pdf (Accessed: 19 December 2016) (in Turkish).
Ozdamar, K., 2002. Statistical Data Analysis with Packet Programs, Kaan Bookstore Press, 4. Edition, Eskisehir. (in Turkish).