CA1243870A - Barrier with internal ducts and construction method - Google Patents
Barrier with internal ducts and construction methodInfo
- Publication number
- CA1243870A CA1243870A CA000475244A CA475244A CA1243870A CA 1243870 A CA1243870 A CA 1243870A CA 000475244 A CA000475244 A CA 000475244A CA 475244 A CA475244 A CA 475244A CA 1243870 A CA1243870 A CA 1243870A
- Authority
- CA
- Canada
- Prior art keywords
- barrier
- duct
- section
- frusto
- mold
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 230000004888 barrier function Effects 0.000 title claims abstract description 81
- 238000010276 construction Methods 0.000 title abstract description 6
- 239000004567 concrete Substances 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims description 10
- 239000012530 fluid Substances 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 241000272470 Circus Species 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical compound CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000011178 precast concrete Substances 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F3/00—Sewer pipe-line systems
- E03F3/04—Pipes or fittings specially adapted to sewers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B21/00—Methods or machines specially adapted for the production of tubular articles
- B28B21/86—Cores
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C11/00—Details of pavings
- E01C11/22—Gutters; Kerbs ; Surface drainage of streets, roads or like traffic areas
- E01C11/221—Kerbs or like edging members, e.g. flush kerbs, shoulder retaining means ; Joint members, connecting or load-transfer means specially for kerbs
- E01C11/223—Kerb-and-gutter structures; Kerbs with drainage openings channel or conduits, e.g. with out- or inlets, with integral gutter or with channel formed into the kerb ; Kerbs adapted to house cables or pipes, or to form conduits
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F15/00—Safety arrangements for slowing, redirecting or stopping errant vehicles, e.g. guard posts or bollards; Arrangements for reducing damage to roadside structures due to vehicular impact
- E01F15/02—Continuous barriers extending along roads or between traffic lanes
- E01F15/08—Continuous barriers extending along roads or between traffic lanes essentially made of walls or wall-like elements ; Cable-linked blocks
- E01F15/081—Continuous barriers extending along roads or between traffic lanes essentially made of walls or wall-like elements ; Cable-linked blocks characterised by the use of a specific material
- E01F15/083—Continuous barriers extending along roads or between traffic lanes essentially made of walls or wall-like elements ; Cable-linked blocks characterised by the use of a specific material using concrete
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F15/00—Safety arrangements for slowing, redirecting or stopping errant vehicles, e.g. guard posts or bollards; Arrangements for reducing damage to roadside structures due to vehicular impact
- E01F15/02—Continuous barriers extending along roads or between traffic lanes
- E01F15/08—Continuous barriers extending along roads or between traffic lanes essentially made of walls or wall-like elements ; Cable-linked blocks
- E01F15/088—Details of element connection
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Laying Of Electric Cables Or Lines Outside (AREA)
- Road Signs Or Road Markings (AREA)
- Particle Accelerators (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
IMPROVED BARRIER WITH INTERNAL DUCTS
AND CONSTRUCTION METHOD
Abstract of the Invention A roadway barrier section includes a duct formed of two intersecting frusto-conical portions placed end-to-end so that the portions taper from the ends of the barrier toward the central portion thereof. The duct is formed using two tapering mold plugs that are preferably frusto-conical. The mold plugs are placed in a concrete form so that the lower edge of the duct is a straight line that is generally parallel to the base of the barrier section.
AND CONSTRUCTION METHOD
Abstract of the Invention A roadway barrier section includes a duct formed of two intersecting frusto-conical portions placed end-to-end so that the portions taper from the ends of the barrier toward the central portion thereof. The duct is formed using two tapering mold plugs that are preferably frusto-conical. The mold plugs are placed in a concrete form so that the lower edge of the duct is a straight line that is generally parallel to the base of the barrier section.
Description
~3 ~ ~ ~3 ~ ~
IMPROVED BARRIER WITH INTERNAL DUCTS
AND CONTRUCTTON METHOD
Background of the Invention This inven-tion relates generally to barriers or dividers suitable for blocking or dividing roadways and particularly -to a barrier section having internal ducts and passageways for providing drainage and a conduit for cables, such as electrical or telephone cables, and method of construction of such a barrier.
It has become conventional practice to employ a barrier for separating oppositely directed traffic lanes.
Such barriers may be either permanently emplaced in -the center divider between lanes or temporarily emplaced to direct traffic away from par-ticular locations, such as construction sites in or ~djacent roadways. The barriers are ormed to prevent au-tomobiles from crossing into the path of oppositely directed traffic and there~ore prevent "head-on" collisions. Typically such barriers comprise a plurality reinforced concrete sections placed end-to-end to extend a desired length, which may vary from several feet to many miles. Some barrier sections include coupling means Eor securing adjacent ends together to form a continuous rigid structure.
Such barriers -typically include a base portion that has a generally rec-tangular or -trapezoidal cross section, a -tapered intermediate portion and an ups-tanding portion that may also be tapered. The base ordinarily rests upon or is embedded in the center divider between lanes. The lowermos-t edge of the base is generally the wides-t portion of the barrier. The intermediate portion tapers from the width of the uppermost edye of the base to the width of the lowermos-t edge of the upstanding portion.
Although these conven-tional harriers have been successful in preventing vehicle crossover from one lane to another, clifficlllties hclve been enco~lntered which stem largely from the fact that low spots in the roadway collect water, debris and o-ther foreign matter and such ~1 ~
collection provides an undesired hazard to the driver of the vehicle~ Conventional practice provides for external drainage systems such as open channels, grooved surfaces and the lilce for conducting wa-ter from the roadway surface. Such practices have not been par~icularly successful due to -the fact that puddles and exposed water does still exis-t since drainage takes time. Also, conventional barriers are not eyuipped to carry electrical cabling, pipes or other ancillary equipment.
U.S. Patent No. 4,105,353 issued August 8, 1978 to Bork, et al. discloses a barrier having a longitudinal internal drainage duct extending the length thereof throu~h the base and a smaller diameter passageway through to the intermedi~te ~or-tion. The duct is suitable for use in a drainage system for carrying water. Both the duct and the passageway are suitable for carrying telephone and electrical wires or the like~ When used in a drainage system, the ducts have side openings ex-tending therefrom to the outer surface of the barrier so that water may flow into the ducts. The barrier has a male end and a female end so that a line of interconnected barriers may be formed.
The barrier disclosed in U.S. Patent No.
4,105,353 function& satisfactorily to prevent vehicle crossovers into opposit:ely directed lanes and -to provide conduits Eor drainage or cables. ~lowever, there are significant difficulties encountered in the fabrication of such barrier sections. The ducts are cylindrica;, which means that a cylindrical mold must be included in the forms used for molding and curing the concrete of which the barriers are formed. After the concrete has been poured and cured sufficien-tly to maintain its shape while unsupported, the cylindrical mold must be withdrawn from the concrete, leaving a cylindrical passage or duct therethrou~h. Even thouyh oil or other sui-table substances may be coated onto the outer surface of the cylindrical mold before pouring the concrete, friction ~3~
between the mold and the surrounding concrete may cause great difficulty in removing the rnolcl. Removing the mold from the concre-te is therefore time consuming and expensive, leacling to a loss of productivity of workers and equipment. An altexnative to removing the mold is to include a pipe of the desired length and diametex in the barrier section. Since modern roadway construction requires a great number of barrier sections, which should be manufactured as economically as possible, including pipes in the barriers is not generally regarded as an economically viable alternative to removing the molds from the barriers.
Therefore) there is a need in the art for an improved roadway barrier and method of construction to provlde lengthwise ducts with molds that are conveni~ntly and easily removed from the barrier after the concrete has cured sufficiently to permit removal of the molds.
Summary oE the Invention This invention overcomes the difficulties associated with fabrication of roadway barriers having ducts or conduits therein. ~he method of the invention uses a pair of tapered mold plugs which each are about half the length of -the barrier section. The mold plugs butt to~ether where the central portion of the duct is to be formed. Significant frict.ional forces are encountered only upon initial rnovement in withdrawal of the mold plugs ~rom the barrier sections.
The mold plugs are pref&rably frusto-conical or they may be formed to provide a fl.a-t and level bottom in the ducts with only the upper portions of the duct having a taper that narrows from the end oE the harrier toward the center. In order to form a level bottom in the duct using frusto-conical mold plugs, the narrower ends of the mold plugs must be formed so that they join to provide a continuous mold 50 that no concrete enters into the region where -the duct should exist.
The invention provi.des a barrier that is more economically constructed than previous barriers while accomplishing the same functions as previous barriers, namely safely and effectively dividing traffic lanes while providing ducts for drainage or for carrying cables.
According to a broad aspect, the invention relates to a method for forming a roadway barrier section having a duct therein comprising the steps of placing a first frusto-conically shaped mold plug in a concrete form, placing a second frusto conically shaped mold plug in the concrete form, positioning the first and a second mold plugs end to end with the smaller end oi each plug abutting each other, aligning one frusto-conical side of the first plug with one frusto-conical side of the second plug to form a continuous mold for the duct, said aligned side defining a substantially straight line the entire lengtll of the duct, for forming a duct which has one side, which when the barrier is in use is disposed as the bottom of the duct, defining a substantially straight line, the top side of the duct defining a center portion which is smaller than the end portions of the duct, pouring concrete into said form, allowing the concrete to cure, and removing the first and second mold plugs from the concrete.
According to a further broad aspect, the invention relates to a roadway barrier section formed as a generally elon-gate structure having a duct therein, the duct being formed to have a first portion and a second portion, the first portion being formed to have a cross section that progressively narrows from a first end of the barrier section to a central portion thereof; the second portion being formed to have a cross section that progressively narrows from a second end of th~ barrier section to the central portion, the first and second portions intersecting to ~orm a continuous duct, the lower portion of the barrier forming a linear portion extending from the first end of the barrier to the second end of the barrier.
~3~
-4a-Brief Descriptlon of the Drawin~s Figure 1 is a perspective view of a precast concrete median barrier according to the invention;
Figure 2 is a partial cross sectional view of the barrier of Figure 1 showing a duct and a drainage scupper;
Figure 3 is a cross sectional view about line 3-3 of Figure l;
Figure 4 is a cross sectional view about line 4-4 of Figure 1 showing details of a barrier joint;
Figure 5 is a perspective view of mold plugs used to form a drain conduit in the barrier of Figure l;
and Figure 6 is a perspective view showing details of an inner end of one of the mold plugs of Figure 5O
Descrip-tion of the Preferred Embodiment Referring to Figure 1, a barrier sec~ion 10 includes a base 12, an intermediate foot section 14 and an ups~anding section 16. The base 12, intermediate foot secion 14 and the upstandinq section 16 are preferably integrally formed and are referenced as separate sections only for ease of description. The barrier section 10 further includes a pr,o~ection 18 at an end 20 and a corresponding recess 22 at the opposite end 24, a duct 26 and a plurality of drainage scuppers 28.
Referring to Figure 2, the duct 26 preferably has a bottom surface 30 that is preferably.parallel to the longitudinal axis of the base 12 so that the base 12 and the bottom 30 of the duct 26 make the same angle with the horizontal. The duct 26 is shown to be comprised of a pair of sections 32 and 34 that are mirror images of one another.
The upper sections 32 and 34 have upper edges `~ 2~3~il~7q3 36 and 38 that taper toward the bottom 30 of the duct 26 so that the duct 26 is narrower at central portion 40 where the sections 32 and 34 meet ihan at the ends 20 and 24. The section 32 has an opening 42 a-t the end 20 of the barrier lO. I'he opening 42 has a greater cross sectional area than the end of the section 32 at the central portion of the duct 26. Similarly, the portion 34 has an opening 44 at the end 24. The openings 42 and 4~ have substantially the same dimensions with the primary difference between the openings 42 and 44 being a projection 46 extending ~rom the end 20 around the opening and a recess 48 extending into the end 24. The projection 46 fits in-to a recess similar to the recess 48 when the barrier section lO is connected to an end similar to the end 24 of another barxier (not shown).
Referring to Fi.gu.res l and 4, the openings 42, 44 may include a male key 52 and a female key 54, respectively. The male key 52 and female key 54 may be of any suitable configura-tion to interconnect a pair of barriers such as the barrier lO end-to-end. As shown in Figure l, the male key 52 and the female key 54 have octagonal cross sections with the male key 52 having sides slightly smaller than those o:E the female key 54. rrhe dimensions of the sides of the male key 52 and the female key 54 are such that the male key 52 easily pene-trates into the female key as shown i.n Figure 5. An end 56 of the male key 52 abuts an end 58 of a second barrier section 60 when the barri.er sections lO and 60 are properly connected to form a joint 57. The male key 52 has a pair of surfaces 62 and 64 tha-t are parallel with and slightly spaced apart from a pair of corresponding surfaces 66 and 68 on the female key 54 when the surfaces 56 and 58 abut one another. A suitable sealant (no-t shown) may be placed between the surfaces 62, 64 and the surfaces 66, 68 to preven-t molsture from flowing into or ou-t of the joint 57 between barrier sections lO and 60.
Figure l, 2 and 3 illustrate details of the ~3~
drainage scupper 28. As shown in Figures 1 and 2, the drainage scupper 28 includes a generally rectangular openiny 70 that leads into a duct 72, as best shown in Figure 3. The duc-t 72 intersects the duct 26 so that water may flow through the opening 70 and the duct 72 into the duct 26. Although the barrier 10 is shown to have two drainage scuppers 28, any desired number of similar drainage scuppers could be included.
The preferred method of forming the barrier section 10 is to mount a pair of tapered mold plugs 76 and 78 in a conventional concrete form. The mold plugs 76 and 78 may be frusto-conical as shown in Figure 5, but may have trapezoidal cross sections having lower edges which form the desired flat bottom portion in the duct 26. The preferred embodiment thus provides a method for forming barrier sections that may be placed end-to-end to include a straiqht, horizontal duct with no low spots in water which could collect and stagnate.
If the mold plugs 76 and 78 are frusto-conical, then they must have surfaces 80 and 82, respectively formed on the smaller ends thereof which butt together to form a continuous mold. The -taper of the mold plugs is ordinarily only about 1-3 inches of diameter for 10 feet of length. Therefore, the duct 26 has only a small deviation from the cylindrical duc-ts (not shown) included in previous barriers.
In order to form smooth inner surfaces in the duc-t 26, -the ends 80 and 82 must be formed to match closely with one another. As best shown in Figure 6, -the end 80 of the mold plug 76 is generally planar, malcing a small acu-te angle with respect to the vertical. The mold plugs 76 and 78 each have a second end 84 and 86, respectively, which may be perpendicular to the longi-tudinal axes thereof. The end 82 of the mold plug 78, therefore, must be formed to abut the end 80 of -the mold plug 76 so -that there are no gaps therebetween.
The mold plugs 76 and 78, being tapered, are ~` ~
31~
easy to pull out of ~he concrete barrier section 10.
Appreciable resistance is encountered only during initial movement of the mold plugs, unli.ke cy].indrical mold plugs, which experience substanti.al frictional resistancs to their withdrawal along the entire length thereof.
IMPROVED BARRIER WITH INTERNAL DUCTS
AND CONTRUCTTON METHOD
Background of the Invention This inven-tion relates generally to barriers or dividers suitable for blocking or dividing roadways and particularly -to a barrier section having internal ducts and passageways for providing drainage and a conduit for cables, such as electrical or telephone cables, and method of construction of such a barrier.
It has become conventional practice to employ a barrier for separating oppositely directed traffic lanes.
Such barriers may be either permanently emplaced in -the center divider between lanes or temporarily emplaced to direct traffic away from par-ticular locations, such as construction sites in or ~djacent roadways. The barriers are ormed to prevent au-tomobiles from crossing into the path of oppositely directed traffic and there~ore prevent "head-on" collisions. Typically such barriers comprise a plurality reinforced concrete sections placed end-to-end to extend a desired length, which may vary from several feet to many miles. Some barrier sections include coupling means Eor securing adjacent ends together to form a continuous rigid structure.
Such barriers -typically include a base portion that has a generally rec-tangular or -trapezoidal cross section, a -tapered intermediate portion and an ups-tanding portion that may also be tapered. The base ordinarily rests upon or is embedded in the center divider between lanes. The lowermos-t edge of the base is generally the wides-t portion of the barrier. The intermediate portion tapers from the width of the uppermost edye of the base to the width of the lowermos-t edge of the upstanding portion.
Although these conven-tional harriers have been successful in preventing vehicle crossover from one lane to another, clifficlllties hclve been enco~lntered which stem largely from the fact that low spots in the roadway collect water, debris and o-ther foreign matter and such ~1 ~
collection provides an undesired hazard to the driver of the vehicle~ Conventional practice provides for external drainage systems such as open channels, grooved surfaces and the lilce for conducting wa-ter from the roadway surface. Such practices have not been par~icularly successful due to -the fact that puddles and exposed water does still exis-t since drainage takes time. Also, conventional barriers are not eyuipped to carry electrical cabling, pipes or other ancillary equipment.
U.S. Patent No. 4,105,353 issued August 8, 1978 to Bork, et al. discloses a barrier having a longitudinal internal drainage duct extending the length thereof throu~h the base and a smaller diameter passageway through to the intermedi~te ~or-tion. The duct is suitable for use in a drainage system for carrying water. Both the duct and the passageway are suitable for carrying telephone and electrical wires or the like~ When used in a drainage system, the ducts have side openings ex-tending therefrom to the outer surface of the barrier so that water may flow into the ducts. The barrier has a male end and a female end so that a line of interconnected barriers may be formed.
The barrier disclosed in U.S. Patent No.
4,105,353 function& satisfactorily to prevent vehicle crossovers into opposit:ely directed lanes and -to provide conduits Eor drainage or cables. ~lowever, there are significant difficulties encountered in the fabrication of such barrier sections. The ducts are cylindrica;, which means that a cylindrical mold must be included in the forms used for molding and curing the concrete of which the barriers are formed. After the concrete has been poured and cured sufficien-tly to maintain its shape while unsupported, the cylindrical mold must be withdrawn from the concrete, leaving a cylindrical passage or duct therethrou~h. Even thouyh oil or other sui-table substances may be coated onto the outer surface of the cylindrical mold before pouring the concrete, friction ~3~
between the mold and the surrounding concrete may cause great difficulty in removing the rnolcl. Removing the mold from the concre-te is therefore time consuming and expensive, leacling to a loss of productivity of workers and equipment. An altexnative to removing the mold is to include a pipe of the desired length and diametex in the barrier section. Since modern roadway construction requires a great number of barrier sections, which should be manufactured as economically as possible, including pipes in the barriers is not generally regarded as an economically viable alternative to removing the molds from the barriers.
Therefore) there is a need in the art for an improved roadway barrier and method of construction to provlde lengthwise ducts with molds that are conveni~ntly and easily removed from the barrier after the concrete has cured sufficiently to permit removal of the molds.
Summary oE the Invention This invention overcomes the difficulties associated with fabrication of roadway barriers having ducts or conduits therein. ~he method of the invention uses a pair of tapered mold plugs which each are about half the length of -the barrier section. The mold plugs butt to~ether where the central portion of the duct is to be formed. Significant frict.ional forces are encountered only upon initial rnovement in withdrawal of the mold plugs ~rom the barrier sections.
The mold plugs are pref&rably frusto-conical or they may be formed to provide a fl.a-t and level bottom in the ducts with only the upper portions of the duct having a taper that narrows from the end oE the harrier toward the center. In order to form a level bottom in the duct using frusto-conical mold plugs, the narrower ends of the mold plugs must be formed so that they join to provide a continuous mold 50 that no concrete enters into the region where -the duct should exist.
The invention provi.des a barrier that is more economically constructed than previous barriers while accomplishing the same functions as previous barriers, namely safely and effectively dividing traffic lanes while providing ducts for drainage or for carrying cables.
According to a broad aspect, the invention relates to a method for forming a roadway barrier section having a duct therein comprising the steps of placing a first frusto-conically shaped mold plug in a concrete form, placing a second frusto conically shaped mold plug in the concrete form, positioning the first and a second mold plugs end to end with the smaller end oi each plug abutting each other, aligning one frusto-conical side of the first plug with one frusto-conical side of the second plug to form a continuous mold for the duct, said aligned side defining a substantially straight line the entire lengtll of the duct, for forming a duct which has one side, which when the barrier is in use is disposed as the bottom of the duct, defining a substantially straight line, the top side of the duct defining a center portion which is smaller than the end portions of the duct, pouring concrete into said form, allowing the concrete to cure, and removing the first and second mold plugs from the concrete.
According to a further broad aspect, the invention relates to a roadway barrier section formed as a generally elon-gate structure having a duct therein, the duct being formed to have a first portion and a second portion, the first portion being formed to have a cross section that progressively narrows from a first end of the barrier section to a central portion thereof; the second portion being formed to have a cross section that progressively narrows from a second end of th~ barrier section to the central portion, the first and second portions intersecting to ~orm a continuous duct, the lower portion of the barrier forming a linear portion extending from the first end of the barrier to the second end of the barrier.
~3~
-4a-Brief Descriptlon of the Drawin~s Figure 1 is a perspective view of a precast concrete median barrier according to the invention;
Figure 2 is a partial cross sectional view of the barrier of Figure 1 showing a duct and a drainage scupper;
Figure 3 is a cross sectional view about line 3-3 of Figure l;
Figure 4 is a cross sectional view about line 4-4 of Figure 1 showing details of a barrier joint;
Figure 5 is a perspective view of mold plugs used to form a drain conduit in the barrier of Figure l;
and Figure 6 is a perspective view showing details of an inner end of one of the mold plugs of Figure 5O
Descrip-tion of the Preferred Embodiment Referring to Figure 1, a barrier sec~ion 10 includes a base 12, an intermediate foot section 14 and an ups~anding section 16. The base 12, intermediate foot secion 14 and the upstandinq section 16 are preferably integrally formed and are referenced as separate sections only for ease of description. The barrier section 10 further includes a pr,o~ection 18 at an end 20 and a corresponding recess 22 at the opposite end 24, a duct 26 and a plurality of drainage scuppers 28.
Referring to Figure 2, the duct 26 preferably has a bottom surface 30 that is preferably.parallel to the longitudinal axis of the base 12 so that the base 12 and the bottom 30 of the duct 26 make the same angle with the horizontal. The duct 26 is shown to be comprised of a pair of sections 32 and 34 that are mirror images of one another.
The upper sections 32 and 34 have upper edges `~ 2~3~il~7q3 36 and 38 that taper toward the bottom 30 of the duct 26 so that the duct 26 is narrower at central portion 40 where the sections 32 and 34 meet ihan at the ends 20 and 24. The section 32 has an opening 42 a-t the end 20 of the barrier lO. I'he opening 42 has a greater cross sectional area than the end of the section 32 at the central portion of the duct 26. Similarly, the portion 34 has an opening 44 at the end 24. The openings 42 and 4~ have substantially the same dimensions with the primary difference between the openings 42 and 44 being a projection 46 extending ~rom the end 20 around the opening and a recess 48 extending into the end 24. The projection 46 fits in-to a recess similar to the recess 48 when the barrier section lO is connected to an end similar to the end 24 of another barxier (not shown).
Referring to Fi.gu.res l and 4, the openings 42, 44 may include a male key 52 and a female key 54, respectively. The male key 52 and female key 54 may be of any suitable configura-tion to interconnect a pair of barriers such as the barrier lO end-to-end. As shown in Figure l, the male key 52 and the female key 54 have octagonal cross sections with the male key 52 having sides slightly smaller than those o:E the female key 54. rrhe dimensions of the sides of the male key 52 and the female key 54 are such that the male key 52 easily pene-trates into the female key as shown i.n Figure 5. An end 56 of the male key 52 abuts an end 58 of a second barrier section 60 when the barri.er sections lO and 60 are properly connected to form a joint 57. The male key 52 has a pair of surfaces 62 and 64 tha-t are parallel with and slightly spaced apart from a pair of corresponding surfaces 66 and 68 on the female key 54 when the surfaces 56 and 58 abut one another. A suitable sealant (no-t shown) may be placed between the surfaces 62, 64 and the surfaces 66, 68 to preven-t molsture from flowing into or ou-t of the joint 57 between barrier sections lO and 60.
Figure l, 2 and 3 illustrate details of the ~3~
drainage scupper 28. As shown in Figures 1 and 2, the drainage scupper 28 includes a generally rectangular openiny 70 that leads into a duct 72, as best shown in Figure 3. The duc-t 72 intersects the duct 26 so that water may flow through the opening 70 and the duct 72 into the duct 26. Although the barrier 10 is shown to have two drainage scuppers 28, any desired number of similar drainage scuppers could be included.
The preferred method of forming the barrier section 10 is to mount a pair of tapered mold plugs 76 and 78 in a conventional concrete form. The mold plugs 76 and 78 may be frusto-conical as shown in Figure 5, but may have trapezoidal cross sections having lower edges which form the desired flat bottom portion in the duct 26. The preferred embodiment thus provides a method for forming barrier sections that may be placed end-to-end to include a straiqht, horizontal duct with no low spots in water which could collect and stagnate.
If the mold plugs 76 and 78 are frusto-conical, then they must have surfaces 80 and 82, respectively formed on the smaller ends thereof which butt together to form a continuous mold. The -taper of the mold plugs is ordinarily only about 1-3 inches of diameter for 10 feet of length. Therefore, the duct 26 has only a small deviation from the cylindrical duc-ts (not shown) included in previous barriers.
In order to form smooth inner surfaces in the duc-t 26, -the ends 80 and 82 must be formed to match closely with one another. As best shown in Figure 6, -the end 80 of the mold plug 76 is generally planar, malcing a small acu-te angle with respect to the vertical. The mold plugs 76 and 78 each have a second end 84 and 86, respectively, which may be perpendicular to the longi-tudinal axes thereof. The end 82 of the mold plug 78, therefore, must be formed to abut the end 80 of -the mold plug 76 so -that there are no gaps therebetween.
The mold plugs 76 and 78, being tapered, are ~` ~
31~
easy to pull out of ~he concrete barrier section 10.
Appreciable resistance is encountered only during initial movement of the mold plugs, unli.ke cy].indrical mold plugs, which experience substanti.al frictional resistancs to their withdrawal along the entire length thereof.
Claims (8)
1. A method for forming a roadway barrier section having a duct therein comprising the steps of:
placing a first frusto-conically shaped mold plug in a concrete form;
placing a second frusto-conically shaped mold plug in the concrete form;
positioning the first and a second mold plugs end to end with the smaller end of each plug abutting each other;
aligning one frusto-conical side of the first plug with one frusto-conical side of the second plug to form a continuous mold for the duct, said aligned side defining a substantially straight line the entire length of the duct, for forming a duct which has one side, which when the barrier is in use is disposed as the bottom of the duct, defining a substan-tially straight line, the top side of the duct defining a center portion which is smaller than the end portions of the duct;
pouring concrete into said form;
allowing the concrete to cure; and removing the first and second mold plugs from the concrete.
placing a first frusto-conically shaped mold plug in a concrete form;
placing a second frusto-conically shaped mold plug in the concrete form;
positioning the first and a second mold plugs end to end with the smaller end of each plug abutting each other;
aligning one frusto-conical side of the first plug with one frusto-conical side of the second plug to form a continuous mold for the duct, said aligned side defining a substantially straight line the entire length of the duct, for forming a duct which has one side, which when the barrier is in use is disposed as the bottom of the duct, defining a substan-tially straight line, the top side of the duct defining a center portion which is smaller than the end portions of the duct;
pouring concrete into said form;
allowing the concrete to cure; and removing the first and second mold plugs from the concrete.
2. The method of claim 1 further including the steps of:
forming a projection in a first end of the barrier section; and forming a recess in the other end of the barrier section to correspond to the projection so that a plurality of such barrier sections may be joined end-to-end to form a continuous barrier.
forming a projection in a first end of the barrier section; and forming a recess in the other end of the barrier section to correspond to the projection so that a plurality of such barrier sections may be joined end-to-end to form a continuous barrier.
3. The method of claim 1 further including the step of forming drainage scuppers in sides of the barrier section to permit fluid communication between the sides of the barrier section and the duct.
4. A roadway barrier section formed as a generally elon-gate structure having a duct therein, the duct being formed to have a first portion and a second portion, the first portion being formed to have a cross section that progressively narrows from a first end of the barrier section to a central portion thereof; the second portion being formed to have a cross section that progressively narrows from a second end of the barrier section to the central portion, the first and second portions intersecting to form a continuous duct, the lower portion of the barrier forming a linear portion extending from the first end of the barrier to the second end of the barrier.
5. The barrier of claim 4 wherein the first and second sections intersect to form a continuous linear portion extending from the first end of the barrier to the second end thereof.
6. The barrier of claim 5 wherein the first and second sections are frusto-conical in form.
7. The barrier of claim 5 wherein the first and second sections intersect to form a continuous linear portion extending from the first end of the barrier of the second end thereof.
8. The barrier of claim 7 wherein the continuous linear portion is parallel to the lower surface of the base.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US60742984A | 1984-05-07 | 1984-05-07 | |
| US607,429 | 1984-05-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1243870A true CA1243870A (en) | 1988-11-01 |
Family
ID=24432233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000475244A Expired CA1243870A (en) | 1984-05-07 | 1985-02-27 | Barrier with internal ducts and construction method |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0180625B1 (en) |
| JP (1) | JPS61502066A (en) |
| AU (1) | AU574467B2 (en) |
| CA (1) | CA1243870A (en) |
| DE (1) | DE3571256D1 (en) |
| WO (1) | WO1985005136A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8810711D0 (en) * | 1988-05-06 | 1988-06-08 | James Garside & Son Ltd | Physical barrier |
| DE3928793A1 (en) * | 1989-08-31 | 1991-03-14 | Spig Schutzplanken Prod Gmbh | CONDUCTIVE THRESHOLD |
| FR2710285B1 (en) * | 1993-09-24 | 1995-11-03 | Plattard Sa | Method for manufacturing slotted channel elements. |
| DE20303254U1 (en) * | 2003-02-28 | 2004-07-08 | Wirtgen Gmbh | Concrete crash barrier |
| JP5432317B2 (en) * | 2012-04-19 | 2014-03-05 | ケイコン株式会社 | Multifunctional protective fence with built-in drainage channel |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1598059A (en) * | 1923-01-29 | 1926-08-31 | Emil F Cykler | Manufacture of concrete piles |
| CH119181A (en) * | 1926-05-07 | 1927-03-01 | Frey Hess Joseph | Pipe fitting. |
| US4105353A (en) * | 1975-10-14 | 1978-08-08 | Bork C Gary | Barrier with internal drainage duct |
-
1985
- 1985-02-27 CA CA000475244A patent/CA1243870A/en not_active Expired
- 1985-04-29 DE DE8585902374T patent/DE3571256D1/en not_active Expired
- 1985-04-29 EP EP85902374A patent/EP0180625B1/en not_active Expired
- 1985-04-29 WO PCT/US1985/000775 patent/WO1985005136A1/en active IP Right Grant
- 1985-04-29 AU AU42946/85A patent/AU574467B2/en not_active Ceased
- 1985-04-29 JP JP60502100A patent/JPS61502066A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| WO1985005136A1 (en) | 1985-11-21 |
| EP0180625A4 (en) | 1986-10-02 |
| AU574467B2 (en) | 1988-07-07 |
| JPS61502066A (en) | 1986-09-18 |
| AU4294685A (en) | 1985-11-28 |
| EP0180625A1 (en) | 1986-05-14 |
| DE3571256D1 (en) | 1989-08-03 |
| EP0180625B1 (en) | 1989-06-28 |
| JPH0420442B2 (en) | 1992-04-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0789111B1 (en) | Modular gutter for drainage channels | |
| WO1997020991A1 (en) | Drainage channel and associated method | |
| US4641993A (en) | Highway barrier with level internal ducts and construction method | |
| WO1998035107A1 (en) | Manhole adjusting extension member | |
| US6663317B1 (en) | Drainage channel | |
| GB2124277A (en) | Arched precast concrete culvert | |
| US2772468A (en) | Dowel bar or tie bar supporting side forms | |
| US4939512A (en) | Modular, non-metallic, hard shell, predimensioned, preformed and sealed induction loop vehicle detection system and method of installation | |
| CA2499539C (en) | Precast safety end and form therefor | |
| CA1243870A (en) | Barrier with internal ducts and construction method | |
| EP0610269A1 (en) | A paving assembly | |
| US20050271473A1 (en) | Width expandable modular erosion control tile system and roadway boundary marker | |
| AU736639B2 (en) | Concrete building blocks | |
| DE4318578A1 (en) | Shuttering block | |
| EP1520942B1 (en) | Surface drainage | |
| EP1167644B1 (en) | Support for spigot-socket pipes and method for producing pipelines, especially sewerage pipelines, using spigot-socket pipes | |
| US4478395A (en) | Refractory runner | |
| TWI854948B (en) | Linear drainage ditch and linear drainage ditch accessories | |
| JP2903207B2 (en) | Method of manufacturing variable slope type waterway block | |
| JPS6022123B2 (en) | How to join paving plates | |
| US20060072970A1 (en) | Modular manhole channel liners | |
| JPH1030204A (en) | Concrete pavement slab | |
| JP2618684B2 (en) | Method of manufacturing back split concrete pipe | |
| KR200306778Y1 (en) | Manhole with Waterstop Plate | |
| CA2365568A1 (en) | Ground covering with elements connected with a control joint and method for making the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |