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Post by adamskiodp on Feb 21, 2020 15:59:47 GMT
Hi folks,
Just passed Chorleywood going southbound and noticed a concrete wall with an iron grill on top. Is this a walkway for a new siding?
Adam
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DWS
every second count's
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Post by DWS on Feb 21, 2020 16:54:07 GMT
No siding at Chorleywood .
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Post by goldenarrow on Feb 21, 2020 17:31:20 GMT
Only building with grills in those woods I can think of is the sub-station.
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Post by Tubeboy on Feb 21, 2020 21:18:08 GMT
The structure is a noise barrier and is related to a noise trial they are doing.
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Post by adamskiodp on Feb 23, 2020 9:51:16 GMT
Thanks Tubeboy 👍🏼
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Post by crusty54 on Feb 23, 2020 16:07:16 GMT
Have seen a post on LinkedIn from the company that has installed the acoustic screen/barrier (it's not a solid wall).
It is a trial installation to see if it does reduced noise in a railway environment. The tests are being monitored by the DfT.
There will be independent assessments.
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DWS
every second count's
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Post by DWS on Feb 23, 2020 18:00:35 GMT
Anyone got a photo of it ?
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Post by crusty54 on Feb 26, 2020 19:25:33 GMT
Hi folks, Just passed Chorleywood going southbound and noticed a concrete wall with an iron grill on top. Is this a walkway for a new siding? Adam I visited the station today. Do you mean the wall/fence at the top of the embankment? This is the boundary wall for the road. |
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Post by MoreToJack on Mar 1, 2020 23:11:42 GMT
I also went up after work on Friday (28/02) and had a good wander around. I didn't notice anything of any significance or difference. Has this been dismantled, or can the OP ( adamskiodp) give any more guidance? |
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Post by crusty54 on Mar 2, 2020 10:17:10 GMT
I also went up after work on Friday (28/02) and had a good wander around. I didn't notice anything of any significance or difference. Has this been dismantled, or can the OP ( adamskiodp) give any more guidance? No response from the OP to my question. I now understand that the sound muffler is not at the station. |
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Post by knap on Mar 2, 2020 11:08:27 GMT
There is something south of the station, on the right as you head for London.
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Post by knap on Mar 2, 2020 15:21:30 GMT
Hopefully attached a picture of the item in question  |
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Post by crusty54 on Mar 2, 2020 17:33:24 GMT
That looks like the sound reducing barrier I saw on LinkedIn. If it is it's hollow on the reverse.
This is not what the OP described (concrete with metal above).
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Post by adamskiodp on Mar 2, 2020 20:47:16 GMT
I also went up after work on Friday (28/02) and had a good wander around. I didn't notice anything of any significance or difference. Has this been dismantled, or can the OP ( adamskiodp ) give any more guidance? No response from the OP to my question. I now understand that the sound muffler is not at the station. Sorry crusty54, just got in from work. The photo posted by knap is the wall I was referring to. Kind regards. |
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DWS
every second count's
Posts: 2,418
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Post by DWS on Mar 2, 2020 20:55:07 GMT
Now is been established the structure at this location is a wall , the title of this thread should be changed.
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Post by MoreToJack on Mar 2, 2020 22:04:36 GMT
Now is been established the structure at this location is a wall , the title of this thread should be changed.  |
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DWS
every second count's
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Post by DWS on Mar 2, 2020 22:32:07 GMT
Now is been established the structure at this location is a wall , the title of this thread should be changed. Thanks  |
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Post by Dstock7080 on Mar 21, 2020 10:29:24 GMT
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Post by howda62 on Mar 21, 2020 11:04:14 GMT
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Post by alpinejohn on Mar 21, 2020 13:27:40 GMT
I am curious to understand the choice of this location to test the effectiveness of an above ground track sound deadening system.
A quick look through the Chorleywood Residents Association website (rather out of date) reveals that despite the area being sliced in half by the M25 which can be quite a source of noise, there were no complaints about noise from the tube lines. Meantime it does report grumbles about being under the Heathrow flight path. If the tube was causing a signficant noise issue in the area it would be astonishing if it did not get flagged up on their site whilst they found space for complaints about local roads being flooded.
I guess the site could have been chosen to see the impact in an area not affected by other noise sources, but it seems strange they did not simply decide to discretely try it out in an area where they already had loads of complaints and see whether they stop. If it works then clearly they have a winner, if not TFL won't be seen to endorse a product which does not work.
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rincew1nd
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Post by rincew1nd on Mar 21, 2020 16:20:01 GMT
Looking at the site, I suspect it was chosen because the space behind it probably made installation easier and thus cheaper.
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Post by crusty54 on Mar 21, 2020 16:35:34 GMT
Looking at the site, I suspect it was chosen because the space behind it probably made installation easier and thus cheaper. Easy access to the monitoring equipment and possibly because they can see the effect from diesels and electric units |
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Post by howda62 on Mar 21, 2020 17:16:09 GMT
The location is accessed from gates into the station car park, and I've seen it used in the past as a point to bring road-rail vehicles onto the tracks. So possibly not just the space around it being a factor, but installation could have been achieved entirely from road without the need to bring in parts on maintenance trains, making installation achievable during running hours. No idea if this is how it was actually done. Overall this location is also pretty quiet aside from the noise from the trains themselves (oh, and not forgetting the no doubt many station announcements  ) - there's a road to the back of the building in shot, which is the car park access road, and the other (quiet) road from which the photos are taken is above the cutting. |
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Post by crusty54 on Mar 21, 2020 19:42:53 GMT
The location is accessed from gates into the station car park, and I've seen it used in the past as a point to bring road-rail vehicles onto the tracks. So possibly not just the space around it being a factor, but installation could have been achieved entirely from road without the need to bring in parts on maintenance trains, making installation achievable during running hours. No idea if this is how it was actually done. Overall this location is also pretty quiet aside from the noise from the trains themselves (oh, and not forgetting the no doubt many station announcements ) - there's a road to the back of the building in shot, which is the car park access road, and the other (quiet) road from which the photos are taken is above the cutting. Too close to the track to be installed whilst trains were running. |
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Post by croxleyn on Mar 22, 2020 9:59:25 GMT
With the opposite embankment so steep, I would have thought that this will reflect far more sound via the higher incidence angle than what the wall is designed to refract.
And its effects will change significantly with the amount of vegetation over the seasons, and also moisture level of the ground...
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Chris M
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Post by Chris M on Mar 22, 2020 10:06:41 GMT
And its effects will change significantly with the amount of vegetation over the seasons, and also moisture level of the ground... If the trial is sufficiently long this will not be an issue, but if it's only something like thee months then it could easily be. |
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) - there's a road to the back of the building in shot, which is the car park access road, and the other (quiet) road from which the photos are taken is above the cutting.
