[Construction Case] Fukushima Prefecture, Soma Port Port Maintenance Management Work (Quay Restoration)
Due to ground subsidence at the harbor quay, there are steps and depressions in the concrete pavement slabs, resulting in the loss of water gradient and the formation of puddles. This issue is resolved using the upcon method.
The Upcon method, which allows for modifications without breaking existing concrete pavement slabs and within a short construction period, has been widely adopted in public works such as roads and airports as a maintenance and repair method. This time, we will introduce a construction site for correcting the sinking of concrete pavement slabs and filling voids at a quay in a port. The quay at Soma Port in Fukushima Prefecture, where cargo loading and unloading occurs frequently, has experienced issues due to ground subsidence, resulting in steps and sinking in the concrete pavement slabs, eliminating the water slope and causing puddles. This has hindered cargo operations. The Upcon method was chosen because it has no environmental impact compared to other methods and can correct the existing slabs without removal in a short period. [Site Information] Soma Port Port Maintenance and Management Work (Quay Restoration) Construction Area: Approximately 285 square meters Maximum Subsidence: 97mm Construction Period: 4 days For detailed information on the construction process, please refer to the PDF download below.
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basic information
■ 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 pushes up the concrete slab to correct it using the pressure from the expansion. 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 expand and fill even small spaces, ensuring complete filling without voids. ■ Features of the Upcon Method 1. Short construction period: The construction time is one-tenth that of conventional methods. 2. No need to stop operations: Heavy equipment or moving loads is unnecessary. 3. Comprehensive high technical capability: 100% in-house employees. 4. Compact construction system: Quick restoration to the original state is possible. 5. Reduced risk of re-sinking compared to conventional methods. We provide total support for on-site investigations, repair planning, and construction, all handled responsibly by our in-house staff. Our specialized and experienced staff, trained in the field, will propose the optimal repair plan tailored to your site.
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Concrete pavement slab settlement correction work
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Company information
We carry out construction work 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 a completely non-fluorinated urethane resin and our unique "Upcon Method" with 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 of the current state is possible. 5. Reduced risk of re-subsidence: Lower risk of re-subsidence compared to conventional methods. We provide total support from on-site surveys nationwide to repair planning and construction, all handled responsibly by our in-house staff. Our specialized and experienced 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.