Pouring steps down to the creek/swimming hole...nope, never done it before!

[Streetcar]

How do you plan to get concrete to the bottom of the stairs ?
tool rental stores may rent tremie
Tremie for placing concrete under water is stiff walled pipe. It has to support the weight of the concrete that forces the water out of the forms. You fill the tremie with concrete with tremie end above subgrade. You keep adding concrete to tremie and slowly raising tremie until concrete is out of the water. Always keep end of tremie in concrete until concrete is out of the water
the concrete for underwater is more designed for pumping than being under water
if creek has gravel bottom, you will not be able to dewater forms easily. Concrete will displace the water

 

[MotorSeven]

Since I only have to displace a few inches of water, I don't think its a big issue.

Onward!....skidded in the staircases today. Next to the pigs first:

 

[MotorSeven]

Since I only have to displace a few inches of water, I don't think its a big issue.

Onward!....skidded in the staircases today. Next to the pigs first:

 

[MotorSeven]

Sorry, not sure why it double posted. Next is the staircase behind the weir:

I have all anchored down, and the top entry pad framed out....more to come

 

[MotorSeven]

Oh, and i need to drop the level if the swimming hole a few inches, so I removed part of the dam....hoping it's enough since the Weir staircase pad will be completely underwater. Kinda hard to apply a nice brush finish....

 

[WranglerX]

Put in water slide...

 

[MossRoad]

Sorry, not sure why it double posted. Next is the staircase behind the weir:

I have all anchored down, and the top entry pad framed out....more to come

We always put ours in with the treads on top....

Just kidding.

Is there bedrock under that last step under the mud or is it pretty far down? I think you mentioned mud but can't recall.

 

[2manyrocks]

I think he said they didn't find bedrock when putting in the rip rock.

I'm assuming you will put in more rip rock between the concrete stairs and the existing rip rock. Otherwise, it looks like the flat side of the concrete will take the brunt of the water coming over the rip rock when the water gets up.

I don't know why it's so hard to find specifics on tremies. There is this best practices pdf. https://www.effc.org/content/uploads/2016/01/Formatted-EFFC-DFI-Tremie-Guide.pdf

I understand the basic concept is to make a stiff mix of concrete, put it in the tremie to keep water from washing out the fines and then release the concrete into the form where the concrete is supposed to displace water due to concrete being heavier than water. However, other than some commercial concrete videos, I'm not finding useful examples of how you do this yourself.

To me, one of the issues is how to get concrete at the base of the stairs so they don't wash out from the bottom.

 

[Streetcar]

A couple of questions
do you play to add reinforcing steel to the stairs
how are you going to place concrete in the forms
how do you plan to keep concrete from flowing out gaps under forms

 

[Streetcar]

I think he said they didn't find bedrock when putting in the rip rock.

I'm assuming you will put in more rip rock between the concrete stairs and the existing rip rock. Otherwise, it looks like the flat side of the concrete will take the brunt of the water coming over the rip rock when the water gets up.

I don't know why it's so hard to find specifics on tremies. There is this best practices pdf. https://www.effc.org/content/uploads/2016/01/Formatted-EFFC-DFI-Tremie-Guide.pdf

I understand the basic concept is to make a stiff mix of concrete, put it in the tremie to keep water from washing out the fines and then release the concrete into the form where the concrete is supposed to displace water due to concrete being heavier than water. However, other than some commercial concrete videos, I'm not finding useful examples of how you do this yourself.

To me, one of the issues is how to get concrete at the base of the stairs so they don't wash out from the bottom.

It is hard to use tremie without equipment to hold and then raise pipe