Block thrust design for a tee

[POLYENGMOR]

Hello fellow engineers,

I need to design for an ongoing project a block thrust for a tee (steel). The problem is I don't have enough space for a classic concrete block thrust, so I need to design some kind of special block thrust (like a pulling one or made of reinforced concrete or an I beam).

Please find attached a little sketch.

Thank you in advance.

 

[JStephen]

Is the clearance to some immoveable object, where you can just pour concrete between it and the tee?
Otherwise, you can use restrained joints on the branch line, I believe you can restrain the joints for X number of feet back- I think this is covered in the ductile-iron standards, not sure.

 

[HTURKAK]

POLYENGMOR ,

Will you provide more info ( joint type, soil conditions, depth of pipe, a cross section sketch ..). Is 500 Tons of branch load due to hydrostatic test ? A simple calc. Abranch =7855 cm2

and the pressure P = 500000/7855 = 63 bars ??

 

[JStephen]

Note that if the pipe is welded or otherwise restrained, you wouldn't get a pressure component of thrust, just that due to momentum change going through the fitting.

 

[CrabbyT]

A thrust block for a 1 meter diameter pipe is going to be ridiculously huge. The thrust from that is probably like... more than 100,000 lbs I think.

Instead of doing a thrust block, why not just use a mechanical joint such as a 1100 MEGALUG® Mechanical Joint Restraint?

 

[POLYENGMOR]

Thank you everyone for your answers.

@JStephen: The clearance is due to upcoming works on the other side of the branch, the block thrust is temporary. Restrained joints are not available at the moment.

@HTURKAK: I made a mistake calculating the branch load, the test pressure is 30 bars, then the load is 236 Tons. The pipes are not buried currently (ongoing works). Please find attached a more detailed sketch.

 

[HTURKAK]

The second picture that you have posted also does not give necessary info . for a valid , valuable comment . Are these temporary supports saddle or sleepers ? Is the branch line has any bend etc. ? so the subject load 236 Tons will cancel.. If the test portion including the branch Tee has a blind flange , the subject force again will cancel each other etc..

Pls provide more data to get better responds..

 

[LittleInch]

If you really want to do this then I think you're going to need steel piles.

But it is not the way to do it. You need to get axial connection from the branch pipe.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.