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Spanish to English translations [PRO]
Tech/Engineering - Construction / Civil Engineering / estudio geotécnico | | Spanish term or phrase: acuerdos verticales, cóncavos y convexos | Aún en este caso, las pilas y estribos de la mayor parte de las estructuras proyectadas, sufrirían asientos totales y diferenciales superiores a los habitualmente aceptados, aún para este tipo de estructuras relativamente poco sensibles a los asientos, dado que muy probablemente se producirían agrietamientos en la losa de compresión y se generarían ***acuerdos verticales, cóncavos y convexos***, en los apoyos, de deficientes condiciones geométricas para cualquier tipo de carretera moderna y menos acir del tipo autovía.
This one is driving me nuts. I found a reference to these "acuerdos" that is referring to "curvas de acuerdo" (link below), which as far as I know are transition curves. Does that fit here? Are they just transitions? If not, what the heck are they?
Here's the link:
http://www.carreteros.org/trazado/3_1ic/apartados/5_3.htm |
| | | sag and crest vertical curves | Explanation:
I think the acuerdos here may be referring to curves, a giant leap perhaps, but I reserve the right to change my mind :-)
Anyway, some info I hope will help:
vertical curve = to provide a gradual change from one slope to another, a curve is inserted between two lengths of a road or railway at different slopes. At the foot of a hill the curve is concave upwards, and at a summit, convex upwards. (Civil engineering dictionary)
Vertical curves are required at the intersection of different road/rail gradients. They are placed so that the rate of change of vertical accelleration is gradual (for safety and comfort) and so that oncoming vehicles are visible for a safe distance. Curves may be convex (summit) or concave (valley or sag). The requirements to be met by a vertical curve are:
constant change of gradient;
uniform rate of increase of centrifugal force;
adequate sighting distances (1st ref)
Vertical Curves
The longitudinal profile of a road consists of straight grades joined by vertical curves. In addition to smoothing the passage of a vehicle from one grade to another the vertical curve increases the sight distance, particularly over crests.
Convex vertical curves are known as summit or crest curves and concave vertical curves as sag curves. At crest curves the minimum length of curve is determined by the requirement to provide stopping sight distance, or by appearance requirements. Lengths above the minimum may increase the sight distance over the crest but may also reduce the sight distance available on the approaches. The minimum length of sag curves is generally determined by considerations for motorist comfort or discomfort due to vertical acceleration, or by appearance. In some instances the length may be governed by drainage, headlight performance or overhead restrictions to the line of sight. 2nd ref)
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Note added at 3 hrs 26 mins (2003-09-23 09:55:50 GMT)
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Hi,
still think that acuerdo vertical may be their way of saying curva de acuerdo vertical, but can\'t find any real evidence. anyway, HTH:
VERTICAL CURVES:
Gradients are joined by vertical curves. ***The vertical curves are normally Parabolas*** rather than circular curves as they provide a smooth transition and the calculations with respect to defining the elevation on any point along the vertical curve is quite straightforward. ***The vertical curves can be of two types , the crest vertical curve, and the Sag vertical curve***
http://www.unb.ca/web/transpo/mynet/mtu74.htm
Tema 18: ACUERDOS VERTICALES
1.- Proyecto de rasantes rectas. 2.- Cambio de rasantes. 3.- Curvas de acuerdo vertical. 4.-Cálculo del radio o parámetro de una curva de acuerdo vertical. 5.- ***Acuerdos verticales en forma parabólica***. 6.- Estudio de un arco de parábola referido a sus tangentes y a un eje de abcisas horizontales. 7.- Nomenclatura. 8.- Cálculo completo del perfil longitudinal. 9.- Cajeo analítico de un perfil transversal. 10.- Medición de superficies. 11.- Medición de volúmenes. Cubicación. 12.- Cubicación por perfiles transversales.
http://www.ulpgc.es/cgi-bin/proyectosdocentes/Presentacion/c...
--------------------------------------------------
Note added at 4 hrs 2 mins (2003-09-23 10:31:53 GMT)
--------------------------------------------------
This is a powerpoint ref in English with some diagrams:
www.ce.ttu.edu/centers/techmrt/Faculty/drsanjaya/ Lesson18_Ch16_Vertical_Alignment.ppt
This is a Spanish link with diagrams of acuerdos:
http://www.carreteros.org/trazado/3_1ic/apartados/6.htm
This is in English (about design) and may be interesting:
http://www.webs1.uidaho.edu/niatt_labmanual/Chapters/geometr...
--------------------------------------------------
Note added at 4 hrs 10 mins (2003-09-23 10:40:05 GMT)
--------------------------------------------------
Compare these:
[RTF]Chapter 503
File Format: Rich Text Format - View as HTML
... street intersections : Same side 200 200 200 Feet. Opposite Side 200 200 200 Feet.
O. Vertical curve parameter K values : Sag To be supplied by Town Engineer. ...
grayme.virtualtownhall.net/Public_Documents/GrayME_RegCodes/ 001995AF-000F8513-001995B7.0/Stree~C3.RTF
PDF]Análisis de la carretera AV-502 con el programa IHSDM Beta v ...
File Format: PDF/Adobe Acrobat - View as HTML
... Para esta carretera, por ser local, la longitud de curva no se ... Elevación, donde
dibuja el perfil longitudinal - Parámetro de acuerdo vertical K - Radio de ...
www.aepo.es/ausc/publ/analisis_IHSDM_AV502.pdf
--------------------------------------------------
Note added at 4 hrs 33 mins (2003-09-23 11:03:28 GMT)
--------------------------------------------------
Características de los acuerdos verticales (*)
Para determinar las dimensiones mínimas (longitud y parámetro) de un acuerdo vertical, conviene atender a los siguientes criterios:
-La visibilidad disponible en el acuerdo vertical debe ser superior o igual a la necesaria para conducir con comodidad y/o efectuar ciertas maniobras con un grado de seguridad aceptable (en particular, una detención de emergencia ante un obstáculo imprevisto y un adelantamiento).
-Consideraciones estéticas o posibilidades de percibir cómodamente un acuerdo vertical comprendido entre dos rasantes uniformes cuya diferencia de inclinación sea pequeña.
http://216.239.59.104/search?q=cache:DDvGTQq9QoYJ:www.miliar...
--------------------------------------------------
Note added at 4 hrs 41 mins (2003-09-23 11:11:27 GMT)
--------------------------------------------------
Geometric design glossary:
http://www.webs1.uidaho.edu/niatt_labmanual/Chapters/geometr...
and more on vertical curves:
http://www.webs1.uidaho.edu/niatt_labmanual/Chapters/geometr... |
| Selected response from:
  Nikki Graham
United Kingdom
Local time: 05:11
| Grading comment Thanks again, Nikki. Great references, and I think you are absolutely right.
4 KudoZ points were awarded for this answer |
| |
| Discussion entries: 0 |
|---|
Automatic update in 00:
|
2 hrs confidence:   sag and crest vertical curves
Explanation:
I think the acuerdos here may be referring to curves, a giant leap perhaps, but I reserve the right to change my mind :-)
Anyway, some info I hope will help:
vertical curve = to provide a gradual change from one slope to another, a curve is inserted between two lengths of a road or railway at different slopes. At the foot of a hill the curve is concave upwards, and at a summit, convex upwards. (Civil engineering dictionary)
Vertical curves are required at the intersection of different road/rail gradients. They are placed so that the rate of change of vertical accelleration is gradual (for safety and comfort) and so that oncoming vehicles are visible for a safe distance. Curves may be convex (summit) or concave (valley or sag). The requirements to be met by a vertical curve are:
constant change of gradient;
uniform rate of increase of centrifugal force;
adequate sighting distances (1st ref)
Vertical Curves
The longitudinal profile of a road consists of straight grades joined by vertical curves. In addition to smoothing the passage of a vehicle from one grade to another the vertical curve increases the sight distance, particularly over crests.
Convex vertical curves are known as summit or crest curves and concave vertical curves as sag curves. At crest curves the minimum length of curve is determined by the requirement to provide stopping sight distance, or by appearance requirements. Lengths above the minimum may increase the sight distance over the crest but may also reduce the sight distance available on the approaches. The minimum length of sag curves is generally determined by considerations for motorist comfort or discomfort due to vertical acceleration, or by appearance. In some instances the length may be governed by drainage, headlight performance or overhead restrictions to the line of sight. 2nd ref)
--------------------------------------------------
Note added at 3 hrs 26 mins (2003-09-23 09:55:50 GMT)
--------------------------------------------------
Hi,
still think that acuerdo vertical may be their way of saying curva de acuerdo vertical, but can\'t find any real evidence. anyway, HTH:
VERTICAL CURVES:
Gradients are joined by vertical curves. ***The vertical curves are normally Parabolas*** rather than circular curves as they provide a smooth transition and the calculations with respect to defining the elevation on any point along the vertical curve is quite straightforward. ***The vertical curves can be of two types , the crest vertical curve, and the Sag vertical curve***
http://www.unb.ca/web/transpo/mynet/mtu74.htm
Tema 18: ACUERDOS VERTICALES
1.- Proyecto de rasantes rectas. 2.- Cambio de rasantes. 3.- Curvas de acuerdo vertical. 4.-Cálculo del radio o parámetro de una curva de acuerdo vertical. 5.- ***Acuerdos verticales en forma parabólica***. 6.- Estudio de un arco de parábola referido a sus tangentes y a un eje de abcisas horizontales. 7.- Nomenclatura. 8.- Cálculo completo del perfil longitudinal. 9.- Cajeo analítico de un perfil transversal. 10.- Medición de superficies. 11.- Medición de volúmenes. Cubicación. 12.- Cubicación por perfiles transversales.
http://www.ulpgc.es/cgi-bin/proyectosdocentes/Presentacion/c...
--------------------------------------------------
Note added at 4 hrs 2 mins (2003-09-23 10:31:53 GMT)
--------------------------------------------------
This is a powerpoint ref in English with some diagrams:
www.ce.ttu.edu/centers/techmrt/Faculty/drsanjaya/ Lesson18_Ch16_Vertical_Alignment.ppt
This is a Spanish link with diagrams of acuerdos:
http://www.carreteros.org/trazado/3_1ic/apartados/6.htm
This is in English (about design) and may be interesting:
http://www.webs1.uidaho.edu/niatt_labmanual/Chapters/geometr...
--------------------------------------------------
Note added at 4 hrs 10 mins (2003-09-23 10:40:05 GMT)
--------------------------------------------------
Compare these:
[RTF]Chapter 503
File Format: Rich Text Format - View as HTML
... street intersections : Same side 200 200 200 Feet. Opposite Side 200 200 200 Feet.
O. Vertical curve parameter K values : Sag To be supplied by Town Engineer. ...
grayme.virtualtownhall.net/Public_Documents/GrayME_RegCodes/ 001995AF-000F8513-001995B7.0/Stree~C3.RTF
PDF]Análisis de la carretera AV-502 con el programa IHSDM Beta v ...
File Format: PDF/Adobe Acrobat - View as HTML
... Para esta carretera, por ser local, la longitud de curva no se ... Elevación, donde
dibuja el perfil longitudinal - Parámetro de acuerdo vertical K - Radio de ...
www.aepo.es/ausc/publ/analisis_IHSDM_AV502.pdf
--------------------------------------------------
Note added at 4 hrs 33 mins (2003-09-23 11:03:28 GMT)
--------------------------------------------------
Características de los acuerdos verticales (*)
Para determinar las dimensiones mínimas (longitud y parámetro) de un acuerdo vertical, conviene atender a los siguientes criterios:
-La visibilidad disponible en el acuerdo vertical debe ser superior o igual a la necesaria para conducir con comodidad y/o efectuar ciertas maniobras con un grado de seguridad aceptable (en particular, una detención de emergencia ante un obstáculo imprevisto y un adelantamiento).
-Consideraciones estéticas o posibilidades de percibir cómodamente un acuerdo vertical comprendido entre dos rasantes uniformes cuya diferencia de inclinación sea pequeña.
http://216.239.59.104/search?q=cache:DDvGTQq9QoYJ:www.miliar...
--------------------------------------------------
Note added at 4 hrs 41 mins (2003-09-23 11:11:27 GMT)
--------------------------------------------------
Geometric design glossary:
http://www.webs1.uidaho.edu/niatt_labmanual/Chapters/geometr...
and more on vertical curves:
http://www.webs1.uidaho.edu/niatt_labmanual/Chapters/geometr...
Reference: http://www.sli.unimelb.edu.au/planesurvey/prot/topic/top13-0...
Reference: http://www.usq.edu.au/users/ayers/tengmod06.htm
| Nikki Graham
United Kingdom
Local time: 05:11
Specializes in field
Native speaker of:  English
PRO pts in category: 1654
|
| | Grading comment | Thanks again, Nikki. Great references, and I think you are absolutely right. |
| | Login to enter a peer comment (or grade) |
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