US3810708A - Method and apparatus for anchoring a cement concrete body such as a roadway onto a base of sand, gravel, soil or similar material - Google Patents

Method and apparatus for anchoring a cement concrete body such as a roadway onto a base of sand, gravel, soil or similar material Download PDF

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Publication number
US3810708A
US3810708A US00231297A US23129772A US3810708A US 3810708 A US3810708 A US 3810708A US 00231297 A US00231297 A US 00231297A US 23129772 A US23129772 A US 23129772A US 3810708 A US3810708 A US 3810708A
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United States
Prior art keywords
cement concrete
hole forming
base
forming device
layer
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Expired - Lifetime
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US00231297A
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English (en)
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G Olsson
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Individual
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Individual
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    • 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
    • E01C23/00—Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces
    • 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
    • E01C7/00—Coherent pavings made in situ
    • E01C7/08—Coherent pavings made in situ made of road-metal and binders
    • E01C7/10—Coherent pavings made in situ made of road-metal and binders of road-metal and cement or like binders
    • E01C7/14—Concrete paving
    • E01C7/145—Sliding coverings, underlayers or intermediate layers ; Isolating or separating intermediate layers; Transmission of shearing force in horizontal intermediate planes, e.g. by protrusions, by inlays
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D27/00—Foundations as substructures
    • E02D27/32—Foundations for special purposes
    • E02D27/50—Anchored foundations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/60—Planning or developing urban green infrastructure

Definitions

  • the invention relates to an improved method of anchoring and bonding a layer of cement concrete, primarily a roadway, onto a base of such resilient material as sand, gravel, stony soil and similar material by forming anchoring elements extending from the cement concrete layer into holes formed in the base and filled with cement concrete flowing down from the cement concrete layer before the hardening thereof.
  • the method operates with elongated hole forming members which are forced downwards in axial direction through the not yet hardened cement concrete layer at an inclined angle to the surface of said layer and into the base to a predetermined depth and thereupon turned about their lower ends to at least vertical and preferably an opposite inclined angular position and thereupon retracted in their axial direction to be swung back to the primary angular position for beginning a new cycle of operations.
  • a preferably travelling apparatus for carrying out the novel method is equipped with at least one hole forming member which is swingably mounted on a horizontal axis and in an articulated manner connected with power means for causing the member to perform its sequence of axial advance, turning, axial retraction, and swinging .return movements with adjustable speed and pressure of advance, preferably together with a plurality of cooperating hole forming members mounted on the same horizontal axis and individually controllable as to their speed and pressure by a common program work.
  • the travelling apparatus is equipped with means to exercise apressure on the cement concrete layer adjacent the hole forming members to force cement concrete into the holes when formed by the members.
  • This invention relates to a method of anchoring a cement concrete body such as a roadway, for example, onto a base of sand, gravel, soil and similar material in order to bring about a uniform distribution of cracks of contraction coming to existence in the body in connection with the hardening of the cement concrete.
  • the method comprises molding a layer of cement concrete on the base and forcing elongated, hole forming devices downwards through the cement concrete layer and down into the base so as to cause cement concrete after removal of the hole forming devices to flow down into the holes in the base and when becoming hardened to form anchoringelernents.
  • the invention also comprises an apparatus for carrying out the novel method.
  • FIGS. 1a to 1e are diagrammatic illustrations of the operation of a hole forming device.
  • FIG. 2 is a diagrammatic side view of a travelling apparatus equipped with hole forming devices.
  • FIG. 3 is a simplified side view of a hole forming device of the type with which the apparatus of FIG. 2 is equipped.
  • FIG. 4 is a front.view of the lower portion of the hole forming device shown in FIG. 3.
  • FIG. 5 is a section following the line VV of FIG. 4.
  • FIGS. Ia to 1e The method of forming anchoring elements between a not yet hardened cement concrete body 1 and a base 2 is illustrated in FIGS. Ia to 1e. These figures show in a simplified manner the lower portion of a hole forming device 3 having a digging end portion or shovel 4.
  • FIG. la illustrates the moment when the hole forming device 2 as a result of an axial displacement with a predetermined inclination to the cement concrete layer 1 with its end portion 4 has reached the surface 5 of said cement concrete layer.
  • the axial advancement of the rod-shaped device 3 is continued until its end portion 4 has penetrated downwards to the predetermined depth in the base 2. In the illustration of FIG. 1b this advancement movement is almost finished.
  • FIG. 1b this advancement movement is almost finished.
  • FIG. 1c shows the end portion in its final position of axial displacement while the device 3 with its end portion 4 as axis of rotation has been turned upwards to a vertical position.
  • the turning movement which in FIG. 1 is shown to be effected clockwise is preferably commenced only after that the axial advancing displacement has been finished, but may also be started earlier.
  • FIG. 1d illustrates the moment when the hole forming device has been turned further clockwise past the vertical line and an axial retraction movement has been imparted thereto.
  • FIG. 1e shows the moment when the hole forming device has been retracted still more and left the cement concrete layer 1. Thereafter, the hole forming device is turned counterclockwise and the cycle of operations is repeated.
  • the preferably shovelformed lowermost portion 4 of the device 3 during its turning movement about the lowermost point thereof with its front will displace a quantity of base material corresponding to the shovel surface ahead and thereby form a hole or aperture 6 which is represented in axial section.
  • This hole will be filled in accordance with the widening of its mouth 7 by the movement of the shovel 4 with cement concrete and will be completely filled with concrete when the shovel 4 has been retracted.
  • the filling out of the hole 6 is facilitated by continously compressing the cement concrete layer I by means ofa roller or a similar element as shall be explained below in more detail.
  • FIG. 2 shows in a simplified manner a travelling apparatus or truck 10 intended to be advanced in the direction of the arrow A, e.g. by its own driving means, over the not yet hardened cement concrete layer 1.
  • the truck 10 has in the shown embodiment supporting rollers 11 and 12 engaging the ground, of which the rear roller 11 is assumed to be pivotable about a vertical shaft 13 to render possible the steering of the truck.
  • the front roller 12 brings about the afore-mentioned compression of the cement concrete layer in order, i.a., to make sure that the holes formed in the base are filled -with cement concrete.
  • FIG. 2 there are illustrated three hole forming devices 3, 3a and 3b, which are mounted swingably about an axis 14, which extends at a right angle to the direction of drive A.
  • the three hole forming devices are mounted spaced from one another in the direction of the axis 14 and will thus form three mutually parallel rows of holes in the base 2. Even if only three hole forming devices have been shown, any desired number can be mounted depending on the breadth of the base 2 to be provided with anchoring holes.
  • All three hole forming devices 3 operate as described in connection with the FIGS. la to 1e; but in order to bring about various hole patterns they may be arranged to become operative at mutually different moments and also be driven with mutually different speeds.
  • FIG. 2 the hole forming device 3 is thus assumed to be in the working position according to FIG. 1d, whereas the devices 3a and 3b are in the working posi tions corresponding to FIGS. It and lb, respectively.
  • the spacing between two adjacent holes in each row will depend on the working speed of the device forming this hole, i.e. of the time spent to perform a working cycle according to the FIGS. 1a to Is.
  • the swinging movement which each hole forming device performs about the upper pivot axis 14 is carried out on actuation by a driving device diagrammatically indicated at 15.
  • This driving device 15 may e.g. consist of a hydraulic motor having a reciprocating piston rod 16 for each of the hole forming devices 3, 3a, 3b.
  • the piston rod 16 is articulately connected to its cooperating hole forming device at 18.
  • FIG. 3 shows more detailed though still diagrammatically a hole forming device 3 of the type employed in the apparatus according to FIG. 2.
  • a holder member 21 is pivotably mounted on the axis 14.
  • Said holder member 21 carries a hydraulic cylinder 19 having a piston 20 formed integrally with a prolongation constituted by the rod-shaped hole forming device 3 and terminating with a shovel 4.
  • the piston 20 is by the cylinder l9 imparted an axially directed movement towards the shovel 4 during the pressing down thereof into, or retraction from, the cement concrete layer 1 and the base 2.
  • the cylinder 19 may be devised to allow a certain return movement of the piston 20 from its most projected position in order to compensate for the reduction of the spacing between the outermost point of the shovel and the axis 14 when the hole forming device approaches the vertical position.
  • a compensation for this reduction of the distance can also be brought about by a resilient mounting in bearings of the axis 14.
  • Both the cylinder 15 and the cylinder 19 are suitably controlled by a program unit 22 of conventional kind.
  • the program unit controls the supply of a pressure fluid such as oil to and from the cylinders through pipes 23, 24 and determines in this way axial movements and turning and pivoting movements, respectively, of the individual hole forming devices.
  • the program unit is operated with punched cards so as to enable the forming of various hole patterns in response to the nature of the base, and preferably the program unit is further devised to feed oil to each cylinder 19 with a pressure corresponding to the density of the base so as to ensure that holes with a predetermined minimum depth are formed in the base.
  • the force is determined with regard to the highest density and the program unit is adjusted in accordance thereto. In this way the depth of the holes will be automatically adapted to occurring variations in density and correct anchoring or bonding will be obtained.
  • FIG. 4 shows a front view of a suitable shovel 4 and FIG. 5 a section through said shovel.
  • the shape and the size of the lower, hole-forming portion of each device may, however, be varied in various manners and such shovel may have a purely rectangular contour or a triangular one with a downward directed point.
  • a method of anchoring a cement concrete body in a base of sand, gravel, soil, or similar material to bring about a uniform distribution of cracks of contraction coming to existence in the body in connection with the hardening of the cement concrete comprising the steps of molding a layer of cement concrete on the base and forcing elongated, hole forming devices through the cement concrete layer and down into the base so as to cause cement concrete after removal of the hole forming devices to flow down into the holes in the base and when becoming hardened to constitute anchoring elements, characterized in that each hole forming device initially is displaced (1) without any substantial swinging motion and "(2) in its axial direction at an angle of inclination through the cement concrete layer and down into the base, whereupon it is turned so much about its lowermost point carried down into the base while that lowermost point remains substantially stationary that its longitudinal axis at least reaches a vertical line, and then it is retracted substantially in the direction of said longitudinal axis.
  • each hole forming device during its downward displacement into the base is actuated by an axiallydirected pressure force the-magnitude of which is determined by the density of the base.
  • a method of anchoring a cement concrete body in a base of sand, gravel, soil, or similar material comprising the steps of:
  • a method as claimed in claim 5 wherein the step of turning said elongated, hole forming device continues until it forms an angle of inclination with respect to the surface of the layer of cement concrete opposite in sense to the angle at which said elongated, hole forming device is initially forced through the layer.

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  • Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • General Engineering & Computer Science (AREA)
  • Road Paving Structures (AREA)
  • Fencing (AREA)
US00231297A 1971-03-04 1972-03-02 Method and apparatus for anchoring a cement concrete body such as a roadway onto a base of sand, gravel, soil or similar material Expired - Lifetime US3810708A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US00445034A US3853417A (en) 1971-03-04 1974-02-22 Apparatus for anchoring a cement concrete body such as a roadway onto a base of sand, gravel, soil or similar material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE02804/71A SE350555B (enrdf_load_stackoverflow) 1971-03-04 1971-03-04

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US3810708A true US3810708A (en) 1974-05-14

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US (1) US3810708A (enrdf_load_stackoverflow)
NO (1) NO128033B (enrdf_load_stackoverflow)
SE (1) SE350555B (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5863148A (en) * 1996-08-27 1999-01-26 Shivaram; Mukundan Prefabricated highway with end supports
US20080000191A1 (en) * 2001-10-05 2008-01-03 Gerhard Hagenah Concrete-molded stone and ready-to-assemble construction made of molded stones

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US744878A (en) * 1903-06-22 1903-11-24 Charlton H Sayre Pavement.
US1654746A (en) * 1925-01-05 1928-01-03 Mullen Charles Augustine Pavement and method of manufacturing the same
US1718863A (en) * 1928-09-15 1929-06-25 Leon R Mackenzie Impact method of making pavement
US1807947A (en) * 1930-01-30 1931-06-02 Jackson F Witt Paving method
US2463979A (en) * 1945-03-26 1949-03-08 Heany Ind Ceramic Corp Process of making porous refractory alumina material
US3680450A (en) * 1969-07-04 1972-08-01 Gunnar Olsson A cement concrete structure with anchoring means for preventing the occurence of large contraction cracks and a method for forming cement concrete structure

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US744878A (en) * 1903-06-22 1903-11-24 Charlton H Sayre Pavement.
US1654746A (en) * 1925-01-05 1928-01-03 Mullen Charles Augustine Pavement and method of manufacturing the same
US1718863A (en) * 1928-09-15 1929-06-25 Leon R Mackenzie Impact method of making pavement
US1807947A (en) * 1930-01-30 1931-06-02 Jackson F Witt Paving method
US2463979A (en) * 1945-03-26 1949-03-08 Heany Ind Ceramic Corp Process of making porous refractory alumina material
US3680450A (en) * 1969-07-04 1972-08-01 Gunnar Olsson A cement concrete structure with anchoring means for preventing the occurence of large contraction cracks and a method for forming cement concrete structure

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5863148A (en) * 1996-08-27 1999-01-26 Shivaram; Mukundan Prefabricated highway with end supports
US5978998A (en) * 1996-08-27 1999-11-09 Shivaram; Mukundan Prefabricated highway with end supports
US20080000191A1 (en) * 2001-10-05 2008-01-03 Gerhard Hagenah Concrete-molded stone and ready-to-assemble construction made of molded stones

Also Published As

Publication number Publication date
NO128033B (enrdf_load_stackoverflow) 1973-09-17
SE350555B (enrdf_load_stackoverflow) 1972-10-30

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