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Rope Access Technique [SORAT] for Various Work Sites

We provide a wide range of services including bridge inspection, repair work, and structural surveys. Our company Keystone’s rope access technique [SORAT] achieves “safe, quick, and reliable” operations to handle various work sites.

Bridge Inspection, Survey, and Repair

Keystone Co., Ltd. is a professional in bridge inspection with extensive experience and achievements. Qualified professionals, including Road Bridge Inspectors, perform close-up visual inspections using rope access techniques, with numerous successful projects involving special bridges such as long-span bridges and high-pier bridges. Additionally, by not using work vehicles or large equipment, traffic restrictions are often unnecessary, greatly contributing to cost reduction and shortened construction periods. We can also handle sites with time constraints, such as railway overpasses. Inspections using rope access are effective for cost reduction as they eliminate the need for scaffolding, shortening the construction period.

Rock Face, Steep Cliff, and Steep Slope Surveys

Even at sites where normal approaches are difficult, such as steep rock faces or unstable slopes, Keystone can reliably conduct surveys and inspections. Utilizing years of experience and advanced rope access techniques, we perform close-up visual and contact observations while ensuring safety. We identify risks hidden at the site and provide consistent high-quality service from survey to final deliverable creation.

Slope Inspection and Road Earthwork Structure Inspection

Slope rope access survey is a method where specialized survey technicians themselves use rope access techniques to move safely, quickly, and freely on slopes treated with protective measures such as sprayed mortar, accurately surveying abnormalities and signs of collapse. Keystone Co., Ltd. conducts high-precision surveys and inspections specializing in slopes, utilizing extensive experience and expertise. Veteran technicians familiar with geology and bedrock supervise the site, using rope techniques to examine the entire slope in detail. Through full hammer sounding tests, close-up visual and contact observations, even slight deformations and cracks are not missed. Furthermore, we conduct core drilling surveys and thermal infrared imaging in-house to accurately understand the progression of weathering and loose bedrock. Our deliverables are designed to be easily understood at a glance.

Drainage Well Inspection

At Keystone Co., Ltd., we leverage our experience, knowledge, and expertise in drainage well inspection to conduct safe and efficient surveys using rope access techniques. Even when ladders cannot be used due to corrosion, our technicians can freely move inside to inspect any area. In addition, our self-developed AnaPro360 shaft wall development precision photography system accurately captures detailed data of wall surfaces. Furthermore, we can quickly confirm shaft wall distortion and tilt using a simple survey method with plumb bobs.

Dam (Body and Spillway) Inspection

Keystone Co., Ltd. has accumulated years of experience and specialized techniques in dam body and spillway surveys and inspections. Using rope access techniques, technicians safely and quickly move across wide areas of dam bodies and spillways, conducting detailed inspections through close-up visual and contact observations. Additionally, by combining drone aerial photography, we can accurately inspect areas that would normally be difficult to check. This achieves excellent results in both time performance and cost performance.

Scaffoldless Construction Method

Scaffoldless inspection, examination, repair, and installation in factories Inspection and repair of theme park attractions High-elevation inspection and repair of wind power generation facilities, towers, and chimneys Exterior wall maintenance Air conditioner installation, removal, and maintenance Installation and removal of signboards

Other Structures

Surge tank inspection
Rock sheds
Tunnels
Box culverts
Spillways, penstock pipes

Other Surveys and Support Work

Elastic wave survey support, geophysical survey support
Cave survey
Water conduit and unlined tunnel survey
Abandoned mine and vertical shaft survey
Tree climbing and specialized tree cutting
Raptor survey support
Rare species survey, survey support, transplantation, etc.
Mountain survey and work guide
Drone recovery

堰堤(えんてい)点検 ###

解説文・・・・・・。

【堤体】
水の圧力を支えるための構造。洪水防止や貯水などが目的。

【堰堤】
主に砂防目的や水資源管理、流水調整のために設置される。