Good Afternoon Everyone,



I’m writing with another update on the progress down in the South Box.


We’ve now resumed work after issues with the excavators over the past few days and the plan is now as follows:



Tuesday (Today):

Excavation has progressed today on removal of tunnel rings with some blinding layers coming down

As with last night works will run up until 10pm, before switching to stockpile management overnight.



Wednesday:

By early-morning the team should be up to the last two rings, at which time the disconnection of power and removing of cabling will commence.

Once these works are complete, the team will come back in and remove the remaining two segments and earth before the end of the station box.



As soon as the power is disconnected, these works will need to continue until the excavation reaches point where power can be reinstated to the entire tunnel. Works will continue into the evening and may need to continue past 10pm depending on progress.

As with previous occasions, we will focus effort on the sections closest to the Botanica at the start of the shift, before moving to the eastern side later in the evening to reduce any impact.



Thursday:

The power will be reinstated to the tunnels as soon as the last of the excavation works are complete and the focus on Thursday will be on removing the final elements of the blinding and earth at the southern end station box.

This is some of the more “fiddly” work as it requires the removal from the corners and edges.

This will all be daytime activity.



By the end of Thursday we will have finished the excavation and demolition of the sacrificial tunnel.

Works from here will involve removing the last of the excavated material from the station box, cleaning the walls and preparing the area for the steelfixing required to construct the base slab.



Our thanks again to everyone for your patience during these works

Once again, I’ll update if anything changes along the way and don’t hesitate to get in touch if you have any concerns.


Thanks, Rob

Weather and permit allowing… Crane will be this Saturday. Same restrictions will apply

See attached…the date in the letter is clearly wrong for sensor installation. It will be early June and we will be given 1 weeks notice.

Good afternoon everyone,

I’ve spoken to, or emailed many of you yesterday about the works going on some 20m underground in front of the Botanica.

I thought I’d provide an update on progress, and the plan for works going forward.

Progress last night was not as good as expected as one of the excavators broke down in front of the excavation work face. As you can imagine this significantly slowed process and has caused a re-think from the program that I outlined to many of you yesterday.

Works will continue this afternoon once the excavator is repaired, but will stop at 10pm.

There will be some sections of the blinding that will need to come down during these works, as you’d be well aware these blinding sections have been causing the vibration as they hit the ground.

I’ve included a photo below to show the remaining works. You can see in the photo the smooth ceiling sections and the rougher sections around it. The rougher sections is where the blinding has yet to come down. For orientation, the corner you can see in the far right of the picture is in front of the Botanica at the Bowen Crescent end. The curtain at the end of the tunnel is the end of the station box.

The team will start works this afternoon focusing on the western tunnel closest to the Botanica, then into the evening they will move to the section furthest from the building to help reduce the vibration.

On Saturday morning we will resume during normal working hours, starting at 7am and work through until 1pm.

The program from here will become clearer once we see how much has been completed on Saturday.

For those who are interested, the critical interface in these works is the electrical connections into the tunnel. these connections power everything in the tunnel between Anzac Station and the Eastern Portal, including the lighting and cross passage works. The excavation can’t move forward until this power is disconnected and removed and once the excavation is complete, power needs to be reconnected as quickly as possible. With last night’s delay these disconnection works will happen early next week.

My apologies again for the disruption during these works, as always, If you’ve got any concerns, don’t hesitate to get in touch.

I’ll provide a further update on Monday.

Thanks, Rob

There will NOT be a crane tomorrow… Will be rescheduled

I know it has been really bad – I have been talking to CYP.

Seems that it was not the concrete rings but the ‘blinding layer’. Let me try and explain.

Deep underground they have a dirt surface. They lay a ‘blinding layer’ of concrete. On top of that they lay the steel reo and then the thick layer of concrete that becomes the floor of the concourse.

Once all that thick concrete layer is cured and secured to the walls, they dig underneath it all – that is all the dirt you see coming out. Once they have dug underneath they need to remove that blinding layer, it is just a working layer. It is concrete and they let it fall.

The big thuds are big chunks of concrete falling. I have asked if they can do in smaller chunks and not after 10pm…not sure that they understand the impact.

Several people have asked about building damage, this is the CYP reply (the thud at 930am today was 2.8mm/s)

The limit for the project for structural damage is 5mm/sec with our warning being 3mm/sec. We hit just under 2.5mm/sec, so whilst it was a big thud – it’s very unlikely to cause damage to any buildings.

James has included a bit of commentary of what levels of vibration mean:

~ 5.0 mm/sec Damage to very sensitive buildings may start to occur

~ 4.0 mm/sec and above – scary.  Very concerning.  Uninhabitable if exposed to vibration for long periods

~ 2.0 mm/sec RMS (2.8~3 mm/sec PPV) very annoying, concerned

~ 1.0 mm/sec RMS (1.4 – 2 mm/sec PPV) very clearly perceptible, annoying

~ 0.4 mm/sec RMS (~0.5 mm/sec PPV) clearly perceptible, potentially annoying during the daytime

~ 0.2 mm/sec RMS (0.28~0.3 mm/sec PPV) perceptible, potentially annoying during the night-time in sleeping areas

~ 0.14 mm/sec RMS (~0.2 mm/sec PPV) just perceptible

~ 0.1 mm/sec (0.14~0.2 mm/sec PPV) threshold of perception

< 0.1 mm/sec RMS (0.14~0.2 mm/sec PPV) not perceptible

I understand that apartment 608 will be available from June 3.

It has one large bedroom, one bathroom, one study nook and it has a car bay. Priced at $380 pw for 6 or 12 month lease.

Call Dixon Kestles in S Melbourne

There will be traffic management and they will allow access for delivery people / intercom access. Obviously if they are in the process of lifting then the delivery person may have to wait 10 minutes type time period.

Bottom line is that there will be a human on duty and you can talk to them if any issues.

Please note that a crane will be being used on Saturday for an owner. This will make access a bit limited…see below

A number of you have commented to me that there was an almighty crash at about 845 pm tonight. Seemed so close it seemed to be inside the building.

CYP have admitted they dropped this large concrete ring onto a hard surface at that time. It is right in front of our building. They are supposed to place some soft soil underneath….but clearly didn’t.

Bad news is that there is still another coming off tonight…hopefully they get their process right this time

Feel free to call 1800 105 105 if you want to comment directly.