Expansion Joint with Adjustable Joint Gaps at Job Site

Development Purpose

• Most of expansion joints are supplied to the job sites with joint gaps fixed. The joint gaps are decided and fixed during the production process in factory, considering the temperature of the job site and installation time. However, it causes several problems such as failure of drainage sheet, narrowness of joint gaps and so on, which normally prevent a proper performance of expansion joint. To mitigate such problems, "Expansion Joint with Adjustable joint Gaps at Job Sites" is developed by our own technology.
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Conventional Expansion Joints

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Conventional Construction Method

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Defect of Conventional Method

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Components in Detail

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DDR's New Method

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Installation References

• Name of Bridge	○○ JCT A1
  Bridge Type	Steel Bridge (Deck Bridge)	Span Length for Expansion	35m	Temperature at Installation	30℃	Adjusted Joint Gap	18mm

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• Name of Bridge	○○ JCT A2
  Bridge Type	Steel Bridge (Deck Bridge)	Span Length for Expansion	85m	Temperature at Installation	30℃	Adjusted Joint Gap	25mm

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• Name of Bridge	○Cheon 2nd Bridge A2
  Bridge Type	Steel Bridge (Deck Bridge)	Span Length for Expansion	40m	Temperature at Installation	5℃	Adjusted Joint Gap	35mm

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• Name of Bridge	○Am 2nd Bridge A2
  Bridge Type	Concrete Bridge	Span Length for Expansion	60m	Temperature at Installation	5℃	Adjusted Joint Gap	35mm

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