[Construction Example] Miyagi Prefecture Port Facility Quay Disaster Recovery Work
Harbor facility quay disaster recovery work
In 2021, the earthquake off the coast of Fukushima caused multiple ground fissures in the loading area and storage yard of the Hibari district in Ishinomaki and Shiogama ports. Traditionally, repairs for similar ground fissures involved open excavation down to the deepest part of the fissure, followed by repeated compaction to create a subgrade. However, this time there were several challenges, leading to the decision to explore methods that could fill the fissures without excavation and within a short construction period. Among these, the Upcon method was adopted as the most effective technique. 【Site Information】 Total construction length: 503 m Maximum depth of fissure: 2,400 mm Construction period: 5 days For detailed explanations and observations of the construction, please refer to the PDF download below.
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■ What is the Upcon Method? The Upcon Method involves drilling small holes with a diameter of 16mm into concrete pavement slabs that have experienced sinking, unevenness, tilting, or gaps. While continuously monitoring the level in millimeter increments, polyurethane resin is injected. The resin injected beneath the slab immediately expands due to a chemical reaction, compacting and strengthening the ground, which improves the bearing capacity and lifts the concrete slab back into position with the pressure from the expanding foam. The required strength is achieved in about 120 minutes, significantly contributing to a shorter construction period. Additionally, if there are gaps beneath the concrete pavement slab, the material can flow into small spaces and expand, allowing for complete filling without any voids. ■ Features of the Upcon Method 1. Short construction period: The construction time is 1/10 of conventional methods. 2. No disruption to operations: There is no need to move heavy equipment or loads. 3. Comprehensive high technical capability: 100% in-house staff. 4. Compact construction system: Quick restoration to the original condition is possible. 5. Reduced risk of re-sinking compared to conventional methods. Our in-house staff provides total support, including on-site surveys, repair planning, and construction, with full responsibility. Our specialized and experienced staff will propose the optimal repair plan tailored to your site.
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Concrete pavement slab settlement correction and void filling work
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Download All Catalogs![[Construction Case Study / Port Edition Vol. 4] Sendai Shiogama Port (Ishinomaki Area) Hibari-no Chuo Pier Quay Disaster Recovery Work](https://image.www.ipros.com/public/catalog/image/01/6e4/734399/IPROS3107554405782613509.jpeg?w=120&h=170)
![[Construction Case Study/Port Edition Vol. 1] Port Maintenance Management Work (Quay Restoration) Subsidence Correction and Void Filling](https://image.www.ipros.com/public/catalog/image/01/93a/646469/IPROS7250851689726681210.jpeg?w=120&h=170)
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![[Road Section] Concrete Pavement Slab Repair Method](https://image.www.ipros.com/public/catalog/image/01/517/569862/IPROS83319363143977941547.jpeg?w=120&h=170)
Company information
We carry out construction to correct the sinking, tilting, steps, and gaps in concrete floors caused by uneven ground subsidence in buildings such as factories, warehouses, stores, and general residences, using our unique "Upcon Method" with completely non-fluorinated urethane resin and small machinery. Additionally, we are engaged in public works that utilize technologies developed through various research and development projects to restore the functionality of aging social infrastructure such as roads, airports, ports, and agricultural waterways. ■ Features of the Upcon Method 1. Short construction period: The construction time is 1/10 of conventional methods. 2. No interruption of operations: No need to move machinery or cargo. 3. Comprehensive high technical capability: 100% in-house employees. 4. Compact construction system: Quick restoration to the current state is possible. 5. Reduced risk of re-subsidence: Lower risk of re-subsidence compared to conventional methods. Our in-house staff provides total support from on-site surveys across the country to repair planning and construction, taking full responsibility. Our specialized and experienced in-house staff will propose the optimal repair plan tailored to your site. Upcon Co., Ltd. was newly listed on the Nagoya Stock Exchange Next Market on December 26, 2022.