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Analisa Pergeseran Bentang Untuk Menghindari Sumber Mata Air Pada Jembatan Ranowulu Di Ruas Tol Manado Bitung

*Anang Sudarwanto  -  Program Studi Program Profesi Insinyur Fakultas Teknik Universitas Diponegoro, Indonesia
Received: 6 Jul 2023; Published: 19 Oct 2023.

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Abstract

Pada ruas jalan Tol Manado Bitung terdapat 4 Jembatan tinggi salah satunya Jembatan Ranowulu, Pada proses pelaksanaan jembatan tersebut mengalami kendala yaitu posisi Abutment A2 Jembatan Ranowulu berjarak 12 m dari lokasi mata air "Aer Ujang", Dikarenakan posisi tersebut, Masyarakat Adat Danowudu melakukan penolakan pembangunan Jembatan Ranowulu Masyarakat Adat mengkhawatirkan pembangunan jembatan akan menghilangkan keberlangsungan mata air "Aer Ujang". Masyarakat Adat meminta dilakukan pergeseran Jembatan Ranowulu dengan radius 200 m dari pusat mata air. Pergeseran tidak dapat dilakukan dikarenakan konstruksi jalan tol sebelum dan sesudah Jembatan Ranowulu sudah dilaksanakan. Lahan lokasi Jembatan Ranowulu sudah dibebaskan. Dikarenakan lokasi lahan yang sudah dibebaskan, sehingga pembangunan Jembatan Ranowulu tetap dilakukan di lokasi tersebut dengan solusi dilakukan pergeseran bentang jembatan ke arah memanjang trase jalan tol. Pergeseran tersebut didukung oleh analisis topografi, Boring dan Geolistrik yang menunjukkan bahwa jembatan tersebut tidak mengganggu keberlangsungan mata air tersebut.Dari Hasil Boring dan Geolistrik di dapatkan perkiraan arah aliran mata air dan akuifer yang ada.

 

Kata kunci: Tol Manado Bitung; Jembatan Ranowulu; Mata Air; Geolistrik ; Akuifer

 

Abstract

 

On the Manado Bitung Toll Road there are 4 high bridges, one of which is the Ranowulu Bridge. In the process of construct the bridge there are obstacles because the A2 Abutment position of the Ranowulu Bridge within 12 m from the location of the "Aer Ujang" spring. Due to this position, the Danowudu Indigenous People reject the construction of the Ranowulu Bridge. The Indigenous People fear that the construction of the bridge will eliminate the sustainability of the "Aer Ujang" spring. Indigenous people ask for a shift in the Ranowulu Bridge with a radius of 200 m from the center of the spring. Shifts cannot be made because the toll road construction before and after the Ranowulu Bridge has been carried out. The Ranowulu Bridge land acquisition has been free. Due to the location of the land that has been acquired, the Ranowulu Bridge construction continues to be carried out at that location with the solution to do a shift in the span of the bridge towards the length of the toll road trase. This shift is supported by topographic, Boring and Geoelectric analysis which shows that the bridge does not interfere with the sustainability of the springs. From the results of Boring and Geoelectric we get an estimate of the direction of the existing spring and aquifer flow.

Keywords: Manado Bitung Toll Road; Ranowulu Bridge; Spring; Geoelectric ; Aquifer

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