{"id":13510,"date":"2021-01-22T14:55:27","date_gmt":"2021-01-22T13:55:27","guid":{"rendered":"https:\/\/www.soletanche-bachy.com\/?p=13510"},"modified":"2023-04-04T18:55:17","modified_gmt":"2023-04-04T16:55:17","slug":"end-of-work-on-the-storage-tank-of-the-siaaps-clichy-plant","status":"publish","type":"post","link":"https:\/\/www.soletanche-bachy.com\/en\/end-of-work-on-the-storage-tank-of-the-siaaps-clichy-plant\/","title":{"rendered":"End of work on the storage tank of the SIAAP\u2019s Clichy plant"},"content":{"rendered":"

January 22nd, 2021<\/p>\n<\/div>

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End of work on the storage tank of the SIAAP\u2019s Clichy plant<\/h1><\/div>
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The project to overhaul the Clichy plant, being led by the SIAAP (Paris Agglomeration Interdepartmental Sanitation Association), aims to increase the pre-treatment and storage capacity of the station through which more than 80% of Paris’s waste-water passes, while reducing disturbance to local residents. To achieve this, a new 70,000m3-capacity storage tank is currently under construction. Two years after completing the diaphragm wall and the injected base of the tank, Soletanche Bachy France is back on the project.<\/strong><\/p>\n<\/div>

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Earlier this year, Bessac<\/a> had completed, using its 3.50 m internal diameter microtunneling machine, the 183 m long hydraulic connection between the core of the pre-treatment plant and the storage tank (see newsletter dated 02\/13\/2020). Afterwards, the 98,000 m3<\/sup>\u00a0of ground were excavated and then evacuated at 94% by barges on the Seine river to reduce the disturbances linked to trucking.<\/p>\n

Soletanche Bachy France<\/a> therefore now needs to take over at the base of the basin, to construct the micropiles<\/a>\u00a0for anchoring the future slab.<\/p>\n

The teams began drilling in October, all at a depth of 27m below the natural ground level. The schedule included 636 micropiles equipped with steel bars between 24m and 27m long, representing a total length of 18,000m to be drilled, at a diameter of 200mm.<\/p>\n

Movement of machinery and equipment, as well as placing of the bars in the boreholes, is being carried out using a 300-tonne mobile crane stationed at the head of the tank and swinging over the imposing 72m-diameter structure. A well-oiled organisation is in place to successfully equip and seal as many micropiles as possible each day, while removing spoil from the head of the tank.<\/p>\n

The last micropile is set to be installed in February 2021. The worksite will then be handed over to the civil engineering teams, which will reinforce and pour the slab.<\/p>\n<\/div>

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