US20060201091A1 - Open bottom fiber reinforced precast concrete arch unit - Google Patents

Open bottom fiber reinforced precast concrete arch unit Download PDF

Info

Publication number
US20060201091A1
US20060201091A1 US11/074,488 US7448805A US2006201091A1 US 20060201091 A1 US20060201091 A1 US 20060201091A1 US 7448805 A US7448805 A US 7448805A US 2006201091 A1 US2006201091 A1 US 2006201091A1
Authority
US
United States
Prior art keywords
portions
arcuate
unit
precast concrete
arch unit
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.)
Abandoned
Application number
US11/074,488
Inventor
William Lockwood
David Brodowski
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BT/CS ACQUISTION CORP
Contech Bridge Solutions Inc
Original Assignee
Con Span Bridge Systems Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Con Span Bridge Systems Ltd filed Critical Con Span Bridge Systems Ltd
Priority to US11/074,488 priority Critical patent/US20060201091A1/en
Assigned to CON/SPAN BRIDGE SYSTEMS LTD. reassignment CON/SPAN BRIDGE SYSTEMS LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BRODOWSKI, DAVID M., LOCKWOOD, WILLIAM D.
Assigned to BT/CS ACQUISTION CORP. reassignment BT/CS ACQUISTION CORP. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CON/SPAN BRIDGE SYSTEMS, LTD
Assigned to CONTECH ARCH TECHNOLOGIES, INC. reassignment CONTECH ARCH TECHNOLOGIES, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BT/CS ACQUISITION CORP.
Assigned to WACHOVIA BANK, NATIONAL ASSOCIATION, AS ADMINISTRATIVE AGENT reassignment WACHOVIA BANK, NATIONAL ASSOCIATION, AS ADMINISTRATIVE AGENT NOTICE OF GRANT OF SECURITY INTEREST Assignors: CONTECH ARCH TECHNOLOGIES, INC.
Assigned to CONTECH ARCH TECHNOLOGIES, INC. reassignment CONTECH ARCH TECHNOLOGIES, INC. TERMINATION OF SECURITY INTEREST IN PATENTS Assignors: WACHOVIA BANK, NATIONAL ASSOCIATION, AS ADMINISTRATIVE AGENT
Assigned to WACHOVIA BANK, NATIONAL ASSOCIATION, AS ADMINISTRATIVE AGENT reassignment WACHOVIA BANK, NATIONAL ASSOCIATION, AS ADMINISTRATIVE AGENT SECURITY AGREEMENT Assignors: ARMORTEC, INC., CONTECH ARCH TECHNOLOGIES, INC., CONTECH TECHNOLOGIES, INC., KEYSTONE RETAINING WALL SYSTEMS, INC., PETRATECH, INC., STORMWATER MANAGEMENT, INC., VORTECHNICS, INC.
Assigned to WACHOVIA BANK, NATIONAL ASSOCIATION reassignment WACHOVIA BANK, NATIONAL ASSOCIATION CERTIFICATE OF AMENDMENT OF CERTIFICATE OF INCORPORATION Assignors: CONTECH ARCH TECHNOLOGIES, INC.
Publication of US20060201091A1 publication Critical patent/US20060201091A1/en
Priority claimed from US11/818,386 external-priority patent/US20070261341A1/en
Assigned to CONTECH BRIDGE SOLUTIONS INC. reassignment CONTECH BRIDGE SOLUTIONS INC. CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: CONTECH ARCH TECHNOLOGIES, INC.
Assigned to WELLS FARGO BANK, N.A. reassignment WELLS FARGO BANK, N.A. SECURITY AGREEMENT Assignors: ALLIANCE CONSTRUCTION PRODUCTS INC., ARMORTEC, LLC, CDS TECHNOLOGIES, INC., CONTECH BRIDGE SOLUTIONS INC., CONTECH CONSTRUCTION PRODUCTS, INC., CONTECH EARCH STABILIZATION SOLUTIONS INC., CONTECH STORMWATER SOLUTIONS INC., CONTECH TECHNOLOGIES, LLC, CONTECH TRUCKING & LOGISTICS, LLC, KEYSTONE RETAINING WALL SYSTEMS, INC., SAFETY PRECAST, INC., SUPERIOR DRAINAGE, LLC, THOMPSON CULVERT COMPANY, WEST TEXAS CULVERTS, INC.
Abandoned legal-status Critical Current

Links

Images

Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/04Lining with building materials
    • E21D11/08Lining with building materials with preformed concrete slabs
    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/04Lining with building materials
    • E21D11/08Lining with building materials with preformed concrete slabs
    • E21D11/083Methods or devices for joining adjacent concrete segments

Abstract

A one-piece open bottom fiber reinforced precast concrete arch unit is buried in compacted soil and has an arcuate top wall portion integrally connecting arcuate side wall portions. The fiber reinforced wall portions have a configuration which provides ductility and flexure strength for effectively utilizing the surrounding compacted soil to resist deflection of the unit in response to a load and to redistribute stresses in the unit. Each of the side wall portions of the unit has a reducing wall thickness towards its bottom and has a radius of curvature greater than the rise of the unit and at least twice the radius of curvature of the top wall portion. Bands of continuous fibers may be attached by adhesive resin to the outer surface of the arcuate side and top wall portions of the unit near opposite ends of the unit to increase the load carrying capacity of the unit.

Description

    BACKGROUND OF THE INVENTION
  • This invention relates to open bottom precast concrete arch units of the type constructed to be buried in the ground or soil and as generally disclosed, for example in U.S. Pat. No. 3,482,406, No. 4,558,969, No. 5,281,053, No. 6,161,342, No. 6,205,717, No. 6,406,220, No. 6,408,581 and No. 6,640,505. Such precast concrete arch units are produced in various sizes and spans, for example, by Bebotech Corporation in Middletown, Ohio who offers part elliptical and part circular shapes and as a single or one-piece casting or as a twin or two-piece casting with spans from 12 feet to 84 feet. In such precast concrete arch units, it is common to have a wall thickness of 8 to 14 inches and to have embedded in the concrete walls steel reinforcing bars or rods which may be in the form of a mesh. The steel reinforcing bars or rods provide the concrete arch unit with sufficient strength to support the soil above the arch unit and any load which may be applied to the arch unit, for example, by the wheels of a vehicle on a road passing over the arch unit.
  • It is desirable to minimize the weight of a precast concrete arch unit without sacrificing strength for supporting a load in order to reduce the construction cost of the unit and the costs for handling, transporting and installing the unit at a construction site. Thus it is desirable to reduce the volume of concrete and the volume of reinforcing steel within a precast concrete arch unit in addition to reducing the labor required to precast the unit. Furthermore, when a one-piece open bottom precast concrete arch unit is used, it is desirable for the unit to be transported while resting on one end and be nested with other similar arch units for efficiently transporting a plurality of the arch units on a semi-trailer bed. While an arch unit may be precasted in two or more sections to facilitate transportation, substantial additional time and labor is required to assemble and connect the sections at the site where the arch units are installed.
  • SUMMARY OF THE INVENTION
  • The present invention is directed to an improved one-piece open bottom precast concrete arch unit which is designed for underground use and to be buried in compacted soil. The arch unit of the invention provides all of the desirable features mentioned above and is effective to utilize the surrounding soil mass as a resistance support for the arch unit and thereby minimize the production cost of the arch unit by substantially reducing the volume and weight of concrete and the weight of reinforcement within the arch unit. The arch unit of the invention eliminates the use of steel reinforcing bars or rods and thus eliminates the labor required to position steel reinforcement bars or rods between the forms which are used to precast the arch unit.
  • In accordance with one embodiment of the invention, a one-piece arch unit is precast with opposite arcuate side wall portions integrally connected by an arcuate top wall portion. The side wall portions have a radius of curvature substantially greater than the radius of curvature of the top wall section, and the radius of curvature of the top wall portion is substantially less than the vertical height or rise of the arch unit and also substantially less than the span of the arch unit between the bottoms of the side wall portions. The precast concrete arch unit of the invention is reinforced with a predetermined volume of reinforcing fibers such as steel fibers which provide the arch unit with substantial ductility and flexure strength in order to utilize the resistance forces produced by the compacted soil mass surrounding the arch unit. Utilizing the compacted soil to resist bulging of the side wall portions of the arch unit enables a substantial load to be supported by the top wall portion.
  • The interaction between the arch unit of the invention with the surrounding soil in combination with the fiber reinforcement not only provides for eliminating steel reinforcement bars and rods, but also provides for substantially reducing the wall thickness of the precast concrete arch unit. The reduction in the wall thickness of the arch unit further increases the ductility of the unit and facilitates the transfer of loads and stresses within the arch unit. Additional economies are achieved by varying the wall thickness of the side wall portions to proportion the strength provided by the arch unit to the applied loads and stresses for the varying conditions around the perimeter of the arch unit. Tapering of the side wall portions also reduces the volume of concrete required to cast the arch unit, thereby further reducing the weight and production cost of the arch unit. In a modification of the invention, one or more elongated bands of longitudinally extending reinforcing fibers are connected or bonded to peripheral or arcuate sections of the top and side wall portions.
  • Other features and advantages of the invention will be apparent from the following description, the accompanying drawings and the appended claims.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 is a perspective view of a plurality of underground open bottom precast arch units constructed in accordance with the invention and shown supported by parallel spaced concrete footers;
  • FIG. 2 is an end view of the arch unit of FIG. 1 and shown buried in compacted soil;
  • FIG. 3 is an end view of only the arch unit shown in FIG. 2 and illustrating the radii of curvature for the side and top wall portions of the arch unit along with the span, rise and wall thicknesses of the unit;
  • FIG. 4 is a diagrammatic view of the arch unit shown in FIG. 2 and illustrating, in exaggerated form, the deflection of the side and top wall portions in response to an applied downward load; and
  • FIG. 5 is a perspective view of a precast concrete arch unit constructed in accordance with the invention and having elongated bands of longitudinally extending reinforcing fibers bonded to the outer surface of the arch unit.
  • DESCRIPTION OF THE PREFERRED EMBODIMENTS
  • FIG. 1 illustrates a plurality or series of longitudinally aligned one-piece open bottom fiber reinforced precast concrete arch units 10 constructed in accordance with the invention and supported by parallel spaced elongated concrete footers 12 which may be cast in place at the construction site or be part of a poured concrete floor. The arch units 10 are buried in compacted soil 15 (FIG. 2) and define a passage 16 through which pedestrians, vehicles or water may pass. The arch units may also be provided with end walls to define a chamber in which water may be temporarily stored, for example, run-off water received from a large parking lot.
  • Referring to FIGS. 1 & 3, each of the precast concrete arch units 10 has a length L, for example, eight feet, and includes a pair of curved or arcuate opposite legs or side wall portions 18 integrally connected by a curved or arcuate top wall portion 22, and the arcuate length of each portion 18 and 22 may be generally the same, as shown by the lines 23 and 24. The arch unit 10 has a height or rise R from the bottom surfaces of the side wall portions 18 to the top inner surface of the top wall portion 22, and the arch unit has a span S between the bottom inner surfaces of the side wall portions 18.
  • Each of the side wall portions 18 has an inner radius of curvature R1, and the top wall portion 22 has an inner radius of curvature R2. Preferably, the radius R1 is greater than twice the radius R2, and the rise R is less than the radius R1. The radius R2 is also greater than 20 percent of the span S and less than 45 percent of the span. Thus the radius R2 is substantially smaller than the rise R, and the radius R1 may be greater than the span S, as shown in FIG. 3. When desired, the arcuate length of each side wall portion 18 may be shortened to reduce the rise R by relocating or inserting end walls within the arcuate forms used to precast the arch unit 10.
  • Each of the precast concrete arch units 10 is poured with a predetermined volume of reinforcing fibers F (FIG. 1) which are preferably steel with each fiber having a length preferably within a range of 0.25 inch to 3 inches and a length at least fifty times the cross-sectional thickness of the fiber. The density of the fibers as they are thoroughly mixed into the concrete before pouring the precast concrete arch unit 10 is preferably within a range of 0.25 and 2.0 percent by volume. One source of steel fibers which has provided satisfactory results are produced by Polytorx, LLC in Ann Arbor, Mich. and sold under the trademark HELIX. The twisted steel fibers of this Company are disclosed in U.S. Pat. No. 6,060,163. However, other fibers also provide satisfactory results, such as the steel fibers produced by Bekaert Corporation and sold under the trademark DRAMIX. Synthetic or non-metal fibers may also be used, for example, fibers sold by Nycon, Inc. under the trademark NYCON.
  • Each of the arch units 10 does not have any embedded steel reinforcing bars or rods, but has a relatively thin wall thickness to provide the fiber reinforced side wall portions 18 and top wall portion 22 with ductility and flexure strength. As shown in FIG. 3, the side wall portions 18 may also be tapered along its arcuate length from the top wall portion 22 which has a uniform thickness TT. The thickness TT of the top wall portion 22 may thus be greater than the thickness TB at the bottom or base of the side wall portions 18. Preferably, the thickness TB is within the range of 1.5 percent to 3.5 percent of the span S and within a range of 0.5 to 0.9 of the top wall thickness TT. For example, in an arch unit 10 having a span S of 16 feet, the top wall thickness TT may be within the range of 5 inches to 7.5 inches while the bottom wall thickness TB may be in the range of 2.5 inches to 4 inches.
  • Referring to FIG. 4, an open bottom precast concrete arch unit 10 buried within the soil 15 is diagrammatically illustrated by a single line. When a downward load W is applied to the soil above the arch unit 10, for example, by the wheels of a heavy vehicle, the top wall portion 22 tends to deflect downwardly, causing the side wall portions 18 to deflect or bulge outwardly, as greatly exaggerated in FIG. 4. However, the resistance forces produced by the compacted soil 15, as indicated by the arrows 30 substantially eliminates or minimizes the bulging of the side wall portions 18 with the result that the deflection of the top wall portion 22 is substantially eliminated or minimized. As a result, the possibility of cracking the fiber reinforced precast concrete arch unit 10 in response to a load W is substantially reduced.
  • Referring to FIG. 5, the wall thickness of the arch unit 10 or of any reinforced concrete arch unit may be minimized and/or the arch unit may be designed to support a heavier load W by adhesively bonding to the outer peripheral or arcuate surface of the arch unit one or more elongated bands 35 of longitudinally extending continuous fibers such as non-metal fibers or carbon fibers. A suitable epoxy adhesive may be used to form a positive bond between the bands 35 and the outer surface of the arch unit 10, and the bands need to extend peripherally over at least part of each of the side wall portions and part of the top wall portion in order to overlap the areas of the arch unit which receive the highest bending stress. However, each band may be more conveniently and quickly attached by having one continuous band 35 which also extends over the top wall portion, as shown in FIG. 5, instead of attaching shorter sections of the bands. Preferably, two peripherally extending thin bands 35 are attached adjacent opposite ends of the arch unit, as shown in FIG. 5, but may be spaced somewhat inwardly from the ends of the unit to provide for the attachment of strips of joint cover material when two arch units abut each other, as shown in FIG. 1. Each of the bands 35 may also have a second overlapping band 38 which may be shorter and applied only in each area of maximum bending stress.
  • As apparent from the drawings and the above description, an open bottom fiber reinforced precast concrete arch unit constructed in accordance with the invention provides desirable features and advantages. For example, by eliminating conventional reinforcing bars and rods and using reinforcing fibers within an arch unit and substantially reducing the wall thickness of the arch unit, the arch unit is provided with ductility and flexure strength so that it may utilize the resistance forces exerted by the compacted surrounding soil to enable the arch unit to support a substantial load applied to the soil above the unit. In addition, the replacement of steel reinforcing bars or rods with the reinforcing fibers F and the substantial reduction in the wall thickness of the arch unit results in a substantial reduction in the volume of concrete used to form the arch unit and a corresponding substantial reduction in the weight of the arch unit. These reductions provide for a significant reduction in the cost of producing the precast arch unit as well as the cost of handling, transporting and installing the arch unit at the construction site. Moreover, by avoiding the use of steel reinforcing bars or rods, the labor required for positioning the reinforcing bars or rods between the form surfaces for the arch unit, is eliminated.
  • Additional economies are achieved by varying the thickness of the side wall portions 18 of the arch unit 10 to proportion the strength provided by the arch unit according to the applied load and stresses around the perimeter of the arch unit. Bending stresses caused by concentrated loads to the top of the arch unit are transformed into thrusts that can be accommodated very efficiently in the arch unit. This transfer of loads and stresses is dramatically enhanced by increasing the ductility of the arch structure. Since the bending stresses in the arch unit diminish towards the base or bottom of the arch unit, the thickness of the side wall portions may be reduced towards the bottoms of the side wall portions. As another advantage, the discontinuity of the steel fibers F prevents corrosion of the reinforcing fibers, and this eliminates the need for additional concrete to protect the reinforcement as is required to protect continuous steel reinforcing bars and rods. Also the fibers add toughness to the precast arch unit, and the toughness resists damage to the unit during handling, shipping and installing. It is also apparent that a plurality of the arch units 10 shown in FIGS. 2 and 3 may be nested during storage and shipping to provide additional economies. It is also apparent that a plurality of laterally adjacent rows of the arch units as shown in FIG. 1 may be used for an underground water storage facility.
  • While the form of arch unit and its method of construction and use herein described constitute a preferred embodiment of the invention, it is to be understood that the invention is not limited to this precise form of arch unit and method, and that changes may be made therein without departing from the scope and spirit of the invention as defined in the appended claims.

Claims (22)

1. An underground open bottom precast concrete arch unit adapted to be buried in compacted soil, said arch unit comprising a one-piece inverted U-shaped wall structure having a predetermined length and arcuate opposite side wall portions integrally connected by an arcuate top wall portion, a predetermined volume of reinforcing fibers dispersed throughout said wall structure and providing said side wall portions and said top wall portion with a predetermined ductility and flexure strength adapted to utilize the resistance of the surrounding compacted soil to increase the load capacity of the unit, said wall structure having a rise defined between bottom surfaces of said side wall portions and an inner top surface of said top wall portion, said arcuate top wall portion having a radius of curvature substantially smaller than said rise, and said arcuate side wall portions each having a radius of curvature greater than said rise.
2. A precast concrete arch unit as defined in claim 1 wherein said arcuate top wall portion has a radius of curvature less than one-half of said radius of curvature of said arcuate side wall portions.
3. A precast concrete arch unit as defined in claim 2 wherein said top wall portion has an arcuate length generally the same as the arcuate length of each of said side wall portions.
4. A precast concrete arch unit as defined in claim 1 wherein each of said arcuate side wall portions has inner and outer curved surfaces converging together toward said bottom surface of said side wall portion and providing said side wall portion with a tapered wall configuration.
5. A precast concrete arch unit as defined in claim 4 wherein each of said side wall portions has a bottom thickness less than ninety percent of the thickness of said top wall portion.
6. A precast concrete arch unit as defined in claim 1 wherein said volume of reinforcing fibers within said wall structure is within a range of 0.25 and 2.0 percent by volume of said wall structure.
7. A precast concrete arch unit as defined in claim 1 wherein said arcuate top wall portion has a radius of curvature greater than twenty percent of the span of said unit as defined between inner bottom surfaces of said side wall portions and less than forty percent of said span.
8. A precast concrete arch unit as defined in claim 1 wherein said reinforcing fibers within said wall structure comprise steel fibers having a length within a range of 0.25 inch and 3 inches.
9. A precast concrete arch unit as defined in claim 1 wherein each of said reinforcing fibers within said wall structure has a length at least fifty times the cross-sectional thickness of said fiber.
10. A precast concrete arch unit as defined in claim 1 wherein each of said wall portions of said wall structure has a bottom thickness within a range of 1.5 percent to 3.5 percent of the span of said wall structure as defined between bottom inner surfaces of said side wall portions.
11. A precast concrete arch unit as defined in claim 1 and including at least one elongated band of longitudinally extending reinforcing fibers connected to peripheral portions of said arcuate top and side wall portions.
12. A precast concrete arch unit as defined in claim 11 wherein said band of reinforcing fibers extends across an area where said top wall portion integrally connects with at least one of said side wall portions.
13. A precast concrete arch unit as defined in claim 11 wherein a plurality of parallel spaced said bands are adhesively bonded to an outer surface of said arcuate top and side wall portions adjacent opposite ends of said wall structure.
14. A precast concrete arch unit as defined in claim 11 and including a second said band overlying and adhesively bonded to at least a portion of the first said band.
15. An underground open bottom precast concrete arch unit adapted to be buried in compacted soil, said arch unit comprising a one-piece inverted U-shaped wall structure having a predetermined length and arcuate opposite side wall portions integrally connected by an arcuate top wall portion, a predetermined volume of reinforcing fibers dispersed throughout said wall structure and providing said side wall portions and said top wall portion with a predetermined ductility and flexure strength adapted to utilize the resistance of the surrounding compacted soil to increase the load capacity of the unit, said wall structure having a rise defined between bottom surfaces of said side wall portions and an inner top surface of said top wall portion, said arcuate top wall portion having a radius of curvature substantially smaller than said rise and between twenty percent and forty five percent of the span of said unit as defined between inner bottom surfaces of said side wall portions, and said arcuate side wall portions each having a radius of curvature greater than said rise.
16. A precast concrete arch unit as defined in claim 15 wherein said arcuate top wall portion has a radius of curvature less than one-half of said radius of curvature of said arcuate side wall portions.
17. A precast concrete arch unit as defined in claim 15 wherein each of said arcuate side wall portions has inner and outer curved surfaces converging together toward said bottom surface of said side wall portion and providing said side wall portion with a tapered wall configuration.
18. A precast concrete arch unit as defined in claim 15 wherein said volume of reinforcing fibers within said wall structure is within a range of 0.25 and 2.0 percent by volume of said wall structure.
19. An underground open bottom precast concrete arch unit adapted to be buried in compacted soil, said arch unit comprising a one-piece inverted U-shaped wall structure having a predetermined length and arcuate opposite side wall portions integrally connected by an arcuate top wall portion, said side wall portions and said top wall portion having ductility and flexure strength adapted to utilize the resistance of the surrounding compacted soil to increase the load capacity of the unit, said wall structure having a rise defined between bottom surfaces of said side wall portions and an inner top surface of said top wall portion, and at least one elongated band of longitudinally extending reinforcing fibers connected to an outer surface of said arcuate top and side wall portions and extending across an area where said top wall portion integrally connects with at least one of said side wall portions.
20. A precast concrete arch unit as defined in claim 19 wherein a plurality of parallel spaced said bands are adhesively bonded to an outer surface of said arcuate top and side wall portions adjacent opposite ends of said wall structure.
21. A precast concrete arch unit as defined in claim 19 and including a second said band overlying and adhesively bonded to at least a portion of the first said band.
22. An underground open bottom precast concrete arch unit adapted to be buried in compacted soil, said arch unit comprising a one-piece inverted U-shaped wall structure having a predetermined length and arcuate opposite side wall portions integrally connected by an arcuate top wall portion, a predetermined volume of reinforcing fibers dispersed throughout said wall structure, said volume of reinforcing fibers within a range of 0.25 and 2.0 percent by volume of said wall structure with said fibers having a length within a range of 0.25 inch and 3 inches to provide said side wall portions and said top wall portion with a predetermined ductility and flexure strength adapted to utilize the resistance of the surrounding compacted soil to increase the load capacity of the unit, said wall structure having a rise defined between bottom surfaces of said side wall portions and an inner top surface of said top wall portion, and said arcuate top wall portion having a radius of curvature substantially smaller than a radius of curvature of each of said side wall portions.
US11/074,488 2005-03-08 2005-03-08 Open bottom fiber reinforced precast concrete arch unit Abandoned US20060201091A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US11/074,488 US20060201091A1 (en) 2005-03-08 2005-03-08 Open bottom fiber reinforced precast concrete arch unit

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
US11/074,488 US20060201091A1 (en) 2005-03-08 2005-03-08 Open bottom fiber reinforced precast concrete arch unit
EP20060737276 EP1856341A2 (en) 2005-03-08 2006-03-07 Open bottom fiber reinforced precast concrete arch unit
AU2006220584A AU2006220584A1 (en) 2005-03-08 2006-03-07 Open bottom fiber reinforced precast concrete arch unit
CA 2600122 CA2600122A1 (en) 2005-03-08 2006-03-07 Open bottom fiber reinforced precast concrete arch unit
PCT/US2006/008086 WO2006096717A2 (en) 2005-03-08 2006-03-07 Open bottom fiber reinforced precast concrete arch unit
US11/818,386 US20070261341A1 (en) 2005-03-08 2007-06-14 Open bottom fiber reinforced precast concrete arch unit

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US11/818,386 Continuation-In-Part US20070261341A1 (en) 2005-03-08 2007-06-14 Open bottom fiber reinforced precast concrete arch unit

Publications (1)

Publication Number Publication Date
US20060201091A1 true US20060201091A1 (en) 2006-09-14

Family

ID=36953977

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/074,488 Abandoned US20060201091A1 (en) 2005-03-08 2005-03-08 Open bottom fiber reinforced precast concrete arch unit

Country Status (5)

Country Link
US (1) US20060201091A1 (en)
EP (1) EP1856341A2 (en)
AU (1) AU2006220584A1 (en)
CA (1) CA2600122A1 (en)
WO (1) WO2006096717A2 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090126129A1 (en) * 2007-03-21 2009-05-21 D Agostino Michael J Precast Arch-Shaped Overfilled Structure
US20090183321A1 (en) * 2008-01-22 2009-07-23 Boresi Glennon J Flared leg precast concrete bridge system
WO2014172158A1 (en) * 2013-04-15 2014-10-23 Contech Engineered Solutions LLC Concrete bridge system and related methods
US20150007758A1 (en) * 2013-07-03 2015-01-08 Rixford Smith Pyramid-Sphere Bunker System
USD745186S1 (en) 2012-04-03 2015-12-08 Contech Engineered Solutions LLC Concrete bridge unit
USD751216S1 (en) 2012-02-20 2016-03-08 Contech Engineered Solutions LLC Concrete bridge unit
US9970166B2 (en) 2012-02-06 2018-05-15 Contech Engineered Solutions LLC Concrete bridge system and related methods

Citations (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US868819A (en) * 1907-02-21 1907-10-22 James A Snoddy Pipe.
US1474808A (en) * 1920-02-24 1923-11-20 Zucco Pierre Method of tunnel construction
US1964386A (en) * 1931-11-12 1934-06-26 Nose Toichi Apparatus for construction of concrete culverts
US2372187A (en) * 1942-09-03 1945-03-27 Pierce John B Foundation Building construction
US2616149A (en) * 1941-01-09 1952-11-04 Bowen Colthurst & Partners Ltd Method of molding in situ concrete arched structures
US3482406A (en) * 1966-08-18 1969-12-09 Heierli & Co Overfilled arch-shaped load support structure
US3734670A (en) * 1970-03-03 1973-05-22 C Stickler Portable mold for erecting concrete or plastic shelters
US4077177A (en) * 1974-08-09 1978-03-07 Boothroyd Rodney L Curved architectural structure of foam and cement
US4537529A (en) * 1984-03-19 1985-08-27 Fitzsimons Louis N Earth retaining end element for use with overfilled load support structures
US4558969A (en) * 1984-03-19 1985-12-17 Bebo Of America Hinge for use with large pre-cast overfilled load support structures
US4680908A (en) * 1980-04-14 1987-07-21 Amoco Corporation Refractory anchor
US4745713A (en) * 1987-02-13 1988-05-24 Yoshiharu Gotoh Prefabricated PC shelter structure
US4869294A (en) * 1984-07-13 1989-09-26 Marcel Matiere Buried large cross-section conduit
US4940360A (en) * 1987-07-27 1990-07-10 Weholt Raymond L Insulated tunnel liner and rehabilitation system
US4987707A (en) * 1988-01-27 1991-01-29 Kiselev Vasily P Vaulted building structure
US5281053A (en) * 1989-04-10 1994-01-25 Marcel Matiere Underground tubular structural system and process for producing it
US5351353A (en) * 1991-04-02 1994-10-04 Csr Humes Pty. Limited Bridge or tunnel construction
US6060163A (en) * 1996-09-05 2000-05-09 The Regents Of The University Of Michigan Optimized geometries of fiber reinforcement of cement, ceramic and polymeric based composites
US6161342A (en) * 1996-07-24 2000-12-19 Samflo Prefabricated concrete element for building a civil engineering structure having an arched wall
US6205717B1 (en) * 2000-04-11 2001-03-27 Freyssinet International (Stup) Bunker construction
US6406220B1 (en) * 1997-10-09 2002-06-18 James Crawford Thomson Arched support structure
US6408581B2 (en) * 1996-07-17 2002-06-25 MONACHINO MOSé Foundation element, methods for the construction of prefabricated structures including these elements, particularly prefabricated tunnels, and prefabricated structures made by these methods
US6474907B2 (en) * 2000-12-13 2002-11-05 Robert A. Semotiuk Environmentally compatible archway for road building
US6640505B1 (en) * 2001-10-25 2003-11-04 Bebotech Corporation Hybrid arched overfilled structure
US6988337B1 (en) * 2002-03-22 2006-01-24 Bebotech Corporation Means and method for constructing a fully precast top arch overfilled system

Patent Citations (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US868819A (en) * 1907-02-21 1907-10-22 James A Snoddy Pipe.
US1474808A (en) * 1920-02-24 1923-11-20 Zucco Pierre Method of tunnel construction
US1964386A (en) * 1931-11-12 1934-06-26 Nose Toichi Apparatus for construction of concrete culverts
US2616149A (en) * 1941-01-09 1952-11-04 Bowen Colthurst & Partners Ltd Method of molding in situ concrete arched structures
US2372187A (en) * 1942-09-03 1945-03-27 Pierce John B Foundation Building construction
US3482406A (en) * 1966-08-18 1969-12-09 Heierli & Co Overfilled arch-shaped load support structure
US3734670A (en) * 1970-03-03 1973-05-22 C Stickler Portable mold for erecting concrete or plastic shelters
US4077177A (en) * 1974-08-09 1978-03-07 Boothroyd Rodney L Curved architectural structure of foam and cement
US4680908A (en) * 1980-04-14 1987-07-21 Amoco Corporation Refractory anchor
US4537529A (en) * 1984-03-19 1985-08-27 Fitzsimons Louis N Earth retaining end element for use with overfilled load support structures
US4558969A (en) * 1984-03-19 1985-12-17 Bebo Of America Hinge for use with large pre-cast overfilled load support structures
US4869294A (en) * 1984-07-13 1989-09-26 Marcel Matiere Buried large cross-section conduit
US4745713A (en) * 1987-02-13 1988-05-24 Yoshiharu Gotoh Prefabricated PC shelter structure
US4940360A (en) * 1987-07-27 1990-07-10 Weholt Raymond L Insulated tunnel liner and rehabilitation system
US4987707A (en) * 1988-01-27 1991-01-29 Kiselev Vasily P Vaulted building structure
US5281053A (en) * 1989-04-10 1994-01-25 Marcel Matiere Underground tubular structural system and process for producing it
US5351353A (en) * 1991-04-02 1994-10-04 Csr Humes Pty. Limited Bridge or tunnel construction
US6408581B2 (en) * 1996-07-17 2002-06-25 MONACHINO MOSé Foundation element, methods for the construction of prefabricated structures including these elements, particularly prefabricated tunnels, and prefabricated structures made by these methods
US6161342A (en) * 1996-07-24 2000-12-19 Samflo Prefabricated concrete element for building a civil engineering structure having an arched wall
US6060163A (en) * 1996-09-05 2000-05-09 The Regents Of The University Of Michigan Optimized geometries of fiber reinforcement of cement, ceramic and polymeric based composites
US6406220B1 (en) * 1997-10-09 2002-06-18 James Crawford Thomson Arched support structure
US6205717B1 (en) * 2000-04-11 2001-03-27 Freyssinet International (Stup) Bunker construction
US6474907B2 (en) * 2000-12-13 2002-11-05 Robert A. Semotiuk Environmentally compatible archway for road building
US6640505B1 (en) * 2001-10-25 2003-11-04 Bebotech Corporation Hybrid arched overfilled structure
US6988337B1 (en) * 2002-03-22 2006-01-24 Bebotech Corporation Means and method for constructing a fully precast top arch overfilled system

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090126129A1 (en) * 2007-03-21 2009-05-21 D Agostino Michael J Precast Arch-Shaped Overfilled Structure
US20090183321A1 (en) * 2008-01-22 2009-07-23 Boresi Glennon J Flared leg precast concrete bridge system
US7770250B2 (en) 2008-01-22 2010-08-10 County Materials Corporation Flared leg precast concrete bridge system
US9970166B2 (en) 2012-02-06 2018-05-15 Contech Engineered Solutions LLC Concrete bridge system and related methods
USD751216S1 (en) 2012-02-20 2016-03-08 Contech Engineered Solutions LLC Concrete bridge unit
USD745186S1 (en) 2012-04-03 2015-12-08 Contech Engineered Solutions LLC Concrete bridge unit
WO2014172158A1 (en) * 2013-04-15 2014-10-23 Contech Engineered Solutions LLC Concrete bridge system and related methods
US20150007758A1 (en) * 2013-07-03 2015-01-08 Rixford Smith Pyramid-Sphere Bunker System
US9151577B2 (en) * 2013-07-03 2015-10-06 Rixford Smith Pyramid-sphere bunker system

Also Published As

Publication number Publication date
AU2006220584A1 (en) 2006-09-14
EP1856341A2 (en) 2007-11-21
WO2006096717A2 (en) 2006-09-14
WO2006096717A3 (en) 2009-04-09
CA2600122A1 (en) 2006-09-14

Similar Documents

Publication Publication Date Title
US6755212B1 (en) Boom stiffening system
US5978997A (en) Composite structural member with thin deck portion and method of fabricating the same
US6719009B1 (en) Composite material piping system
RU2244778C2 (en) Arch structure formed of sheet material with composite reinforcement members of concrete enclosed by metal shell
US6854928B2 (en) Precast concrete culvert system
AU689097B2 (en) Reinforced metal box culvert
KR100999020B1 (en) Composite phc pile and construction method using the same
US4300320A (en) Bridge section composite and method of forming same
EP1029138B1 (en) Cellular stirrups and ties for structural members, structural members comprising said stirrups or ties and method of construction of said structural members.
US7253786B1 (en) Reinforced monopole construction
KR100946449B1 (en) Bridge deck panels, fabrication methods and use
US20010037533A1 (en) Composite deck system and method of construction
KR100797194B1 (en) Composite concrete column and construction method using the same
KR100546941B1 (en) A connection device to connect concrete piles
US6955190B2 (en) Reinforcing wrap for plastic pipe
CA2620434C (en) Tube-style truck body
US20020048493A1 (en) Composite pile with tapering lower portion and method for driving pile into granular soil
KR100646666B1 (en) Hybrid beam for slim-floor and slim-floor structure using the same
US6023806A (en) Modular polymer matrix composite support structure and methods of constructing same
US6578343B1 (en) Reinforced concrete deck structure for bridges and method of making same
DK166744B1 (en) Method of producing hollow constructions, in particular pipelines and hollow constructions
US6108998A (en) Modular polymer matrix composite support structure and methods of constructing same
KR100487143B1 (en) Connected structural body
US20040128939A1 (en) Composite bearing deck comprising deck panel and concrete
KR100534456B1 (en) Tunnel support lattice girder

Legal Events

Date Code Title Description
AS Assignment

Owner name: CON/SPAN BRIDGE SYSTEMS LTD., OHIO

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:LOCKWOOD, WILLIAM D.;BRODOWSKI, DAVID M.;REEL/FRAME:016366/0971

Effective date: 20050307

AS Assignment

Owner name: BT/CS ACQUISTION CORP., OHIO

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CON/SPAN BRIDGE SYSTEMS, LTD;REEL/FRAME:016862/0248

Effective date: 20050713

AS Assignment

Owner name: CONTECH ARCH TECHNOLOGIES, INC., OHIO

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:BT/CS ACQUISITION CORP.;REEL/FRAME:016871/0469

Effective date: 20050713

AS Assignment

Owner name: WACHOVIA BANK, NATIONAL ASSOCIATION, AS ADMINISTRA

Free format text: NOTICE OF GRANT OF SECURITY INTEREST;ASSIGNOR:CONTECH ARCH TECHNOLOGIES, INC.;REEL/FRAME:016958/0692

Effective date: 20041207

AS Assignment

Owner name: CONTECH ARCH TECHNOLOGIES, INC., OHIO

Free format text: TERMINATION OF SECURITY INTEREST IN PATENTS;ASSIGNOR:WACHOVIA BANK, NATIONAL ASSOCIATION, AS ADMINISTRATIVE AGENT;REEL/FRAME:017115/0285

Effective date: 20060131

AS Assignment

Owner name: WACHOVIA BANK, NATIONAL ASSOCIATION, AS ADMINISTRA

Free format text: SECURITY AGREEMENT;ASSIGNORS:KEYSTONE RETAINING WALL SYSTEMS, INC.;ARMORTEC, INC.;CONTECH ARCH TECHNOLOGIES, INC.;AND OTHERS;REEL/FRAME:017275/0045

Effective date: 20060131

AS Assignment

Owner name: WACHOVIA BANK, NATIONAL ASSOCIATION, NORTH CAROLIN

Free format text: CERTIFICATE OF AMENDMENT OF CERTIFICATE OF INCORPORATION;ASSIGNOR:CONTECH ARCH TECHNOLOGIES, INC.;REEL/FRAME:017458/0892

Effective date: 20060328

AS Assignment

Owner name: CONTECH BRIDGE SOLUTIONS INC., OHIO

Free format text: CHANGE OF NAME;ASSIGNOR:CONTECH ARCH TECHNOLOGIES, INC.;REEL/FRAME:022113/0429

Effective date: 20060328

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION

AS Assignment

Owner name: WELLS FARGO BANK, N.A., NORTH CAROLINA

Free format text: SECURITY AGREEMENT;ASSIGNORS:CONTECH CONSTRUCTION PRODUCTS, INC.;CONTECH BRIDGE SOLUTIONS INC.;CDS TECHNOLOGIES, INC.;AND OTHERS;REEL/FRAME:025026/0472

Effective date: 20100720