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Have you heard of any published guidelines for frequency of expansion/contraction joints in cast-in-place concrete tunnels?

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تم إضافة السؤال من قبل Muhammad Shakeel , CAD Design Manager , M/S zeeruk Intl.
تاريخ النشر: 2015/04/09
Muhammad Shakeel
من قبل Muhammad Shakeel , CAD Design Manager , M/S zeeruk Intl.

Thanks to all, i agreed with MR. Yaqoob Abdullah, 

We are not aware of specific published guidelines for expansion and contraction joints spacing for tunnels. This is because the thermal effects are related to the depth of the tunnel, the length of the tunnel, the ventilation in the tunnel, environmental issues, location, etc.... For short tunnels (and the tunnel in question is one of them) the interior temperature is the same as the ambient temperature while the temperature of the exterior face of the walls or the slab is based on the soil cover over them. For shallow tunnels the top slab exterior face temperature could be very close to the ambient temperature while for deep cover or for the walls and the bottom slab the temperature on the outer face could be constant around55F. Therefore, there is a thermal gradient between the inner face and the outer face of the tunnel walls and slabs that the designer should consider. Often no expansion joints are provided in tunnels, only contraction/construction joints30 -50 ft spacing are provided.

If expansion joints are needed, I suggest that careful attention to the waterproofing details should be provided because the joints are usually the source of water infiltration.

hatem labib
من قبل hatem labib , Quality control manager , MISER consultant

you can read BS or ASTM about joints in general case   

Alex Al Yazouri
من قبل Alex Al Yazouri , General Manager , Al Mushref Cooperative Society

Sorry Mr. Shakeel I have not heard of any published guidelines for frequency of expansion/contraction joints in cast-in-place concrete tunnels.

Elke Woofter
من قبل Elke Woofter , Project Assistant , American Technical Associates

Sorry, I am not in this field, however I have found that ISO has regulations on most subjects

مستخدم محذوف‎
من قبل مستخدم محذوف‎

Thermal effects are related to the depth of the tunnel, the length of the tunnel, the ventilation in the tunnel, environmental issues, location, etc...

 

If expansion joints are needed, I suggest that careful attention to the waterproofing details should be provided because the joints are usually the source of water infiltration.

 

Mahmoud Zaher Tarakji
من قبل Mahmoud Zaher Tarakji , مدير , أوال جاليري

Sorry . i have not heard MR Shakeel.

Wolf Klaas Kinsbergen
من قبل Wolf Klaas Kinsbergen , Managing Director, Designer , ingenieursbureau KB International NV

Yes! the EUROCODE has all kind of Publications, but also as mentioned the ASTM .

 

 

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