| 英文摘要 |
The purpose of this project aims to reinforce main branch and roadside gutters of Kaohsiung City cleaning and maintenance. For facilitating proper drainage, cleaning work is supposed to be finished before tide season in order to avoid overfilling around city center during rainy season. The main schemes of this project are divided into 5 programs, preliminary, inspecting gutters, ditch cleaning and dredging, checking the quality of operation and efficiency assessment.
1、Personnel and equipment configuration
In this project, the main work is based on manpower and the auxiliary are equipments. There are two teams in this project. The first team only depends on manpower work, 9 people with a high-pressure washer engine and sludge removal vehicles are required. The other team is 3 people with a sewer cleaner (vacuum/jetting tanker), excavator and sludge removal vehicles. In order to secure and prevent the mobility of manpower or leave request, 3 more people are required by advance arrangement. All equipments meet regulatory requirements of this project. The vehicles of sewer cleaning have a sewer cleaner and 2 sludge removal vehicles. Moreover, an additional excavator is using for a specific working area in order to meet demand of cleaning side sewer of mountain.
2、Work load of cleaning up gutters
The Contract of this project was started from 9 Aug 2013 to 8 Aug 2014. Besides the preliminary work in August 2013 and generating report in July 2014, all the cleaning work has met contract requirement. Up to 6 June 2014, the total length of cleaned gutters is 50,372 m, which took 100.74 % of the achievement rate.
Mud cleaned out from roadside gutters is transported by sludge removal vehicles (612-BU), belongs to a legal cleaning and removal industry with level B qualification, to landfill (Gangshan, Qishan and Daliao) for disposing. Moreover, the project followed the regulations from Environmental protection Bureau Kaohsiung City Government. Such as the route from roadside gutters to landfill are followed by cleaning squadrons of each district and the data from weight notes are saved. Furthermore, all relevant documents of waste treatment are provided in order to examine by Environmental protection Bureau Kaohsiung City Government. Total amount of cleaned volume is 477.61 tons which is carried by 61 cars.
3、Inspection and examination
From 9 August 2013 to 8 August 2014, 141 abnormal side gutters were found, including 45 serious clogs caused by covering flowerpot and malignantly blocked up, and 20 side gutters without covers and too large interval distance. It is clear to see that the main influential factor of side gutter cleaning is apparent external factors. Overall, poor construction and drain cover take 34.0% and 34.8% of influences during cleaning side gutters. Therefore, quality of construction and gutters maintenance should meet higher requirement.
In total, 101 in site checked by inspection team, including 96 are qualified and 5 with defect, and the most of common defects could have immediate improvement, for example: workers did not wear safety vest, lacking of traffic safety cones, no traffic directors, roadside stacked with ditch mud without sweeping and labors worked slothfully. However, these defects had been reformed after inspecting intensively. During the working period, occupational injuries and accidents had never been caused.
4、Authority of dredging section and initial investigation by subordinate units
Great successes were achieved in authority of dredging section and initial investigation by subordinate units this year, according to the report from inspection team and assistance from district cleaning squadrons, which have accomplished the data of internal investigation around 142.09 kilometers in Kaohsiung City. There were found 269 ditch with abnormal construction and confusion of responsibilities at Zhongzheng and Fuxing road in Meinong District, and at Qianfeng, Renshou and Jieshou road in Gangshan District. Comparing with the cadastral map transcription from the system of cadastral information in Land Administration Bureau Kaohsiung City Government and relevant information of country road from Third Maintenance office, Directorate General of Highways, Ministry of Transportation and Communications. It totally was found 175 lot numbers shown as the following. 181 country road (7.8k~15.18k) which includes 45 records at Zhongzheng road (Zhongxing Section) and 38 records at Fuxing road (Longzhong and Guishan Section) in Meinong District, and 186 country road (1.961K~6.491K) which includes 39 records at Qianfeng road (Dayong Section), 6 records at Renshou road (Jieshou Section) and 47 records at Jieshou road (Liucuo Section) in Gangshan District. The owners of lot numbers take responsibility for management and maintenance which belonged to 38 records from National Property Administration, Ministry of Finance, 24 records from Armaments Bureau, the Ministry of National Defense, 40 records from Kaohsiung Irrigation Association and 73 records from private organizations.
5、Project Assessment
(1) Analysis on influencing factors of gutters cleaning：
In order to investigate factors related to design of drawdown slope, defected construction, section and depth of gutter, intake design and construction, and pollution from surrounding. According to inspection, 141 defective gutters could be refereed to several reasons shown as the following, 14 defected designs, 48 defected construction, 49 defected drain cover and 30 tainted by environment. To conclude, drain construction and covers have significant influence on ditch dredging and maintaining, which take 34.0% and 34.8 of influences during cleaning side gutters.
(2) The best method of analysis for gutters cleaning：
Regarding to result of inspection, the most relevant program of gutters cleaning is highly recommended as the following: 12 people are arranged into a team to carry out gutters cleaning and it also requires 1 sewer cleaner (vacuum/jetting tanker), 1 mud sweeper and equipment. Moreover, staff arrangement is listed as the following, 1 gutter cleaning trunk driver, 1 sewer cleaner (vacuum) operator, 1 sewer cleaner (jetting) operator, 1 site supervisor is in charge, 1 open covering operator, 1 traffic director, 4 bagging operators and 2 carriers. According to the ditches with various standards and dimensions all over the Kaohsiung city, the examined samples are only chosen in this program of gutters cleaning and the relevant efficient gutters cleaning data is for reference only.
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