CA1076835A - Anchor bolt tester - Google Patents
Anchor bolt testerInfo
- Publication number
- CA1076835A CA1076835A CA324,288A CA324288A CA1076835A CA 1076835 A CA1076835 A CA 1076835A CA 324288 A CA324288 A CA 324288A CA 1076835 A CA1076835 A CA 1076835A
- Authority
- CA
- Canada
- Prior art keywords
- platform
- pulling device
- hydraulic
- ground
- mounting
- 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A ground anchor testing apparatus. The apparatus has a platform with a pulling device mounted generally in the center of the platform. The pulling device is preferably universally mounted on the platform. The pulling device is adapted to be detachably connected to the ground anchor to pull on it.
Means are provided on one end of the platform for attaching the apparatus to a carrying vehicle such as a tractor. Prefe-rably, the platform is hinged to the attaching means and means are provided for raising or lowering the platform about the hinge. Support means are provided at the other end of the platform for supporting the platform on the ground during use.
A ground anchor testing apparatus. The apparatus has a platform with a pulling device mounted generally in the center of the platform. The pulling device is preferably universally mounted on the platform. The pulling device is adapted to be detachably connected to the ground anchor to pull on it.
Means are provided on one end of the platform for attaching the apparatus to a carrying vehicle such as a tractor. Prefe-rably, the platform is hinged to the attaching means and means are provided for raising or lowering the platform about the hinge. Support means are provided at the other end of the platform for supporting the platform on the ground during use.
Description
i~'7~835 This invention is directed toward a testing apparatus.
The invention is more particularly directed toward a testing apparatus for use in testing ground anchors.
Ground anchors are devices embedded in the ground to which load carrying members, such as cables, are anchored.
The cable, which may for example, be used to support a hydro towex, transmits a load to the anchor which the anchor must - be able to handle without danger of being pulled out of the ground. To ensure that the ground anchors are capable of carrying the maximum load they will be subjected to during use, without being pulled from the ground, they must be tested by applying a test pulling load to the anchor before use.
The testing equipment normally employed to test ground anchors comprises a platform on legs. The platform ;~ carries means centrally thereon for attachment to the anchor.; The legs comprise, or contain, hydraulic units for attempting to raise the platform once it has been connected to the anchor so as to apply a pulling load to the anchor to test it. These testing device are somewhat similar to the casing pulling device shown in U.S. Patent 1,929,055.
The known testing devices are difficult to handle ; in rough terrain however. A lot of preliminary work is required to provide a relatively stable platform before the anchor can ~ be tested. The ground supporting the platform, or the platfoxm ; itself, must be generally levelled before testing can proceed.
In many cases, the ground anchors project out of the ground at an angle to the vertical~ In order to apply a direct axial testing load on such non-vertical anchors, further preliminary work is required to set up the platform at a proper angle or , 30 slope relative to the ground anchor. All the setting up work is time consuming and as a result, testing is quite slow.
, 1~7~835 It is the purpose of the present invention to provide a ground anchor testing apparatus which, due to its construction, is quickly and easily set up to apply a test pull on a ground anchor. As a result many more ground anchors can be tested per unit o~ time than can be tested with the present test equipment.
It is another purpose of the present invention to ~ -provide testing apparatus which is simple, yet strong, in cons-truction, and which is easily handled during both transport and use.
The invention is directed toward a testing apparatus for ground anchors comprising: a platform, a pulling device `
mounted on the platform adapted to be coupled to a ground anchor to apply an upwardly directed pulling force to the anchor, and means for universally mounting the pulling device on the platform.
The testing apparatus of the present invention employs a platform which carries a pulling device. The platform has means whereby it can be readily positioned and stabilized, relative to a ground anchor prior to applying a test load to the anchor. The pulling device on the platform is adapted to be coupled to the ground anchor and the pulling device applies a load to the anchor to test it. The pulling device is uni-versally mounted on the platform so as to be able to tilt to apply a direct axial load to the anchor. Support pads are pro-vided about the platform, individually adjustable in height, to support the platform firmly on the ground during testing.
The invention is particularly directed toward a testing apparatus for ground anchors having a pulling device adapted to ~; be coupled to a ground anchor to apply an upright pulling force to the anchor. The apparatus includes a platform, and means for - mounting the pulling device on the platform.
~ ~, ~' "
Separate means are also on the platform for supporting the platform on the ground when testing.
Preferably, a universal joint is provided for mounting the pulling device on the platform.
The invention will now be described in detail having reference to the accompanying drawings in which:
Fig. 1 is a perspective view of the testing apparatus, Fig. 2 is a plan view of the apparatus' ;
Fig. 3 is a side elevation view of the apparatus, Fig. 4 is a schematic view of the hydraulic system employed in the apparatus, Fig. 5 is a perspective, detail view, in partial section, of the mounting of the pulling device, and Fig. 6 is another detail, cross-sectional view of the mounting of the pulling device.
The testing apparatus 1 of the present invention is used primarily to test that ground anchor members 3 are properly anchored to handle the pulling load they are designed for.
The testing apparatus 1 includes a pulling device 5 adapted to be coupled to the end 7 of an anchor member 3 pro-jecting out of the ground as shown in Fig. 3. The pulling device 5 i5 hydraulically operated as will be described and includes a cylindrical housing 11, a piston 13 slidable within the housing 11, (see Fig. 4) and a piston rod 15 projecting from the piston 13 out one end 17 of the housing 11. A coupling member 19 is attached to the free end 21 of piston rod 15 for use in connecting the pulling device to the end 7 of the anchor member 3.
The pulling means 5 is mounted on a platform 23. The platform 23 can comprise a main box beam 25 and a pair of spaced-apart, secondary, box beams 27, 29 extending transversely from - the main box beam 25. Each secondary box beam 27, 29 is spaced ~, ~; . ~ . : - . .
inwardly approximately the same distance from the nearest end 31 of the main beam 2S. The secolndary beams 27, 29 are also symmetrical a~out a central axis 33 which transversely bisects the main beam 25 as shown in Fig. 2.
The pulling device 5 is mounted on the platform 23 between the secondary beams 27, 29 and adjacent the main beam 25. The pulling device 5 is universally mounted on the plat-` form 23. To this end, as shown in Figs. 5 and 6, the pulling device 5 is mounted axially within a short. square-cross sectioned,~ `
~` 10 tubular sleeve 35~ A first pair of axially aligned pivot pins 37 r 39 are fixed in diametrically opposed relation to a reinforced axial projection 12 having a ~ore 14 of the cylindrical housing 11 of pulling device 5 near its bottom end 17. The pivot pins 37, 39 are rotatably mounted in opposed vertical walls 41, 43 .. , of sleeve 35. The other two vertical walls 45, 47 of the sleeve , 35 carry a second pair of axially aligned, oppositely facing, pivot pins 49, 51. The axis of aligned pins 49, 51 intersects ;
the axis of aligned pins 37, 39 and also the axis of the cylin-drical housing 11. The second pair of pivot pins 49, 51 are rotatably mounted in a pair of cantilevered, space~-apart arms 53, 55 projecting from main beam 25 of the platform. Arms 53, 55 are adjacent the secondary beams 27, 29 respectively. The first and second set of pivot pins 37, 39 and 49, 51 permit the generally upright pulling device 5 to swivel so as to align axially with non-vertical anchoring devices 3 as shown in Fig. 3.
The platform 25 has attaching means 61 at one end for use in mounting it on a carrying vehicle. The carrying vehicle can be a tractor and the testing apparatus 1 is mounted on the front of the tractor by way of the attaching means 61. These attaching means 61 preferably comprise a generally rectangular mounting plate 63 and two pair of brackets 65, 67, each consisting _ of spaced-apart support plates 69, 71. The support plates 69, 71 _ 4 _ ~7~;8~5 of each bracket pair 65, 67 are fixed to the inner surface 73 of mounting plate 63 and extend perpendicular to plate 63 extending well above its top edge 75. The free end 77 of secondary beam 27 is pivotably mounted between support plates, 69, 71 of bracket 65 by a first horizontal pin 79 and the free end 81 of secondary beam 29 is pivotably mounted between support plates 69, 71 of bracket 67 by a second horizontal pin 83. Pins 79, 83 are axially aligned. Platform 25 is thus free to rotate about pins 79, 83.
Means are provided for lifting and lowering the platlorm 23 about pins 79, 83. The lifting and lowering means preferably comprise a pair of hydraulic units 91, 93. Each hydraulic unit 91. 93 has a cylindrical housing 9S, a piston 97 within the housing 95, as shown in Fig. 4, and a piston rod 99 projecting from the piston 97 out one end 101 of housing 95.
Each housing 95 has a pair of diametrically opposed pivot pins 103 projecting from it adjacent its other end 105. The pivot pins 103 are rotatably mounted between the upper free ends of support plates 69, 71 of brackets 65, 67. One hydraulic unit 91 is mounted to the top of bracket 65 and the other hydraulic unit 93 is mounted to the top of bracket 67. The free end 111 of the piston rod 99 of each hydraulic unit 91, 93 is pivotably mounted to a pivot pin 113 fixed between two attachment plates 115, 117. Plates 115, 117 project up from the secondary beams 29, 31, and are located slightly nearer to main beam 2S than to mounting plate 63. Actuation of the hydraulic units 91, 93, in unison will raise or lower the platform 23 about pivot pins 79, 83.
Support means are provided at the other end of the platform 23. The support means can comprise a pair of ground support members 123, 125, one support member 123 located at . . .
1~'7683~
one end of the main platform beam 25, the other support member 125 located at the other end of the main beam 25. Support members 123, 125 are ide~tical. Each comprises a hydraulic unit 131 extending generally vertically. Each hydraulic unit 131 comprises a cylindrical housing 133, a piston 135 slidable in the housing 133, as shown in Fig. 4 and a piston rod 137 projecting from the piston 135 out of the bottom end 139 of the housing 133. The upper end 141 of each housing 133 is pivotably connected by a pivot pin 143 to the free ends 145 of a pair of cantilevered support arms 147 extending up and out from the end of the main beam 25. Each pair of arms 147 extends perpendicular to main beam 25 and are rigidly fixed to beam 27. They could however, if desired, be mounted for rotation about a vertical axis on the ends of main beam 25.
The bottom of piston rod 137 of each hydraulic unit 131 is fixed to a pad plate 149. Plate 149 is relatively large !and, when operational, rests on the ground to distribute load over a relatively large area. The plate 149 has a tubular element 151 centrally located thereon and extending vertically, perpendicular to the plate. Piston rod 137 is fixed to tubular element 151. Triangular plates 153 can be provided, joined to tubular element 151 and plate 149 to act as reinforcing ribs.
A hydraulic system is provided to operate hydraulic - units 5, 91, 93 and 131. One suitable system is shown in Fig. 4.This system has a hydraulic fluid reservoir 161 and a feed line 163 leading therefrom to a pump 165 operated by a motor 167.
From the pump 165, the hydraulic fluid passes through line 169 to a two-way valve 171 which directs fluid simultaneously to either end of cylinders 95 forming part of the hydraulic units 91, 93, and back through valve 171 to line 169. The units 91, 93 act in unison to raise or lower platform 23. ~hine 169 :~>7683S
continues to a by-pass valve 173. From by-pass valve 173, a return line 175 leads back to reservoir 161. A branch line 177 leads from line 169 to a second two-way valve 179 operating one hydraulic unit 131, ~rom valve 179 to a second :
two-way valve 181 operating the second hydraulic unit 131, and from valve 181 back to line 169. The height o~ each pad plate 149 can thus be individually adjusted by its own hydraulic unit 131.
From by-pass valve 173, a feed line 185 leads to a reservoir 187 which feeds fluid, via line 189, to a second pump 191 operated by motor 193. From pump 191, line 195 leads to a two-way valve 197, to hydraulic pulling device 5, back through two-way valve 197,and back to return line 175. A pressure indicating gauge 199 can be provided in line 195 leading to hydraulic pulling device 5. The secondary hydraulic circuit, defined by lines 185, 189 and 195, provides for a controlled amount of pressure to be applied to hydraulic pulling device :
5, and thus to be coupled ~o anchQr 3 which is to be tested, independently of the pressure applied to hydraulic units 91, 93 and 131. The pressure applied to the pulling device 5 - can be controlled by controlling pump motor 193.
: The hydraulic system for the testing apparatus can be self-contained on the testing apparatus or it can be combined with any hydraulic system on the vehicle carrier to which the testing apparatus is attached by plate 63.
In operation, the testing apparatus 1 is transported, by a vehicle carrier, to which it is attached, to the site of the anchor to be tested. During transport, the pad plates 149 are raised or retracted by the hydraulic unit 131, and the platform 23, carrying the hydraulic pulling device 5, and the pad plates 149, is raised by the hydraulic units 91, 93.
At the test site, the platform 23 is lowered to a generally ~7i~83~
horizontal position and the vehicle carrier is maneouvered to position the hydraulic pulling device 5 generally over the anchor member 3. The upright pulling device 5 is then attached to the anchor member 3 via the coupling 19. The universal mounting of the pulling device 5 permits it to be axially ~ -aligned with the anchor member so a direct pull in an upright :.
direction can be applied to the anchor member 3. The pad plates 149 are then lowered by their hydraulic units 131 to press on the ground so as to provlde a stable support for the :
platform 23. Once the platform 23 has been stabilized, hydrau- :
lic pulling device 5 is acutated to provide an upright pull on the anchor member of a predetermined pressure for a pre-determined period of time. For example a pull of 100 ~ips can be applied for 2, or 3, minutes to the anchor. After testing the anchor, the pressure is releived, the device 5 is uncoupled from the anchor and the apparatus is moved to the next anchor to test it.
. : .. :, , ,, ~
The invention is more particularly directed toward a testing apparatus for use in testing ground anchors.
Ground anchors are devices embedded in the ground to which load carrying members, such as cables, are anchored.
The cable, which may for example, be used to support a hydro towex, transmits a load to the anchor which the anchor must - be able to handle without danger of being pulled out of the ground. To ensure that the ground anchors are capable of carrying the maximum load they will be subjected to during use, without being pulled from the ground, they must be tested by applying a test pulling load to the anchor before use.
The testing equipment normally employed to test ground anchors comprises a platform on legs. The platform ;~ carries means centrally thereon for attachment to the anchor.; The legs comprise, or contain, hydraulic units for attempting to raise the platform once it has been connected to the anchor so as to apply a pulling load to the anchor to test it. These testing device are somewhat similar to the casing pulling device shown in U.S. Patent 1,929,055.
The known testing devices are difficult to handle ; in rough terrain however. A lot of preliminary work is required to provide a relatively stable platform before the anchor can ~ be tested. The ground supporting the platform, or the platfoxm ; itself, must be generally levelled before testing can proceed.
In many cases, the ground anchors project out of the ground at an angle to the vertical~ In order to apply a direct axial testing load on such non-vertical anchors, further preliminary work is required to set up the platform at a proper angle or , 30 slope relative to the ground anchor. All the setting up work is time consuming and as a result, testing is quite slow.
, 1~7~835 It is the purpose of the present invention to provide a ground anchor testing apparatus which, due to its construction, is quickly and easily set up to apply a test pull on a ground anchor. As a result many more ground anchors can be tested per unit o~ time than can be tested with the present test equipment.
It is another purpose of the present invention to ~ -provide testing apparatus which is simple, yet strong, in cons-truction, and which is easily handled during both transport and use.
The invention is directed toward a testing apparatus for ground anchors comprising: a platform, a pulling device `
mounted on the platform adapted to be coupled to a ground anchor to apply an upwardly directed pulling force to the anchor, and means for universally mounting the pulling device on the platform.
The testing apparatus of the present invention employs a platform which carries a pulling device. The platform has means whereby it can be readily positioned and stabilized, relative to a ground anchor prior to applying a test load to the anchor. The pulling device on the platform is adapted to be coupled to the ground anchor and the pulling device applies a load to the anchor to test it. The pulling device is uni-versally mounted on the platform so as to be able to tilt to apply a direct axial load to the anchor. Support pads are pro-vided about the platform, individually adjustable in height, to support the platform firmly on the ground during testing.
The invention is particularly directed toward a testing apparatus for ground anchors having a pulling device adapted to ~; be coupled to a ground anchor to apply an upright pulling force to the anchor. The apparatus includes a platform, and means for - mounting the pulling device on the platform.
~ ~, ~' "
Separate means are also on the platform for supporting the platform on the ground when testing.
Preferably, a universal joint is provided for mounting the pulling device on the platform.
The invention will now be described in detail having reference to the accompanying drawings in which:
Fig. 1 is a perspective view of the testing apparatus, Fig. 2 is a plan view of the apparatus' ;
Fig. 3 is a side elevation view of the apparatus, Fig. 4 is a schematic view of the hydraulic system employed in the apparatus, Fig. 5 is a perspective, detail view, in partial section, of the mounting of the pulling device, and Fig. 6 is another detail, cross-sectional view of the mounting of the pulling device.
The testing apparatus 1 of the present invention is used primarily to test that ground anchor members 3 are properly anchored to handle the pulling load they are designed for.
The testing apparatus 1 includes a pulling device 5 adapted to be coupled to the end 7 of an anchor member 3 pro-jecting out of the ground as shown in Fig. 3. The pulling device 5 i5 hydraulically operated as will be described and includes a cylindrical housing 11, a piston 13 slidable within the housing 11, (see Fig. 4) and a piston rod 15 projecting from the piston 13 out one end 17 of the housing 11. A coupling member 19 is attached to the free end 21 of piston rod 15 for use in connecting the pulling device to the end 7 of the anchor member 3.
The pulling means 5 is mounted on a platform 23. The platform 23 can comprise a main box beam 25 and a pair of spaced-apart, secondary, box beams 27, 29 extending transversely from - the main box beam 25. Each secondary box beam 27, 29 is spaced ~, ~; . ~ . : - . .
inwardly approximately the same distance from the nearest end 31 of the main beam 2S. The secolndary beams 27, 29 are also symmetrical a~out a central axis 33 which transversely bisects the main beam 25 as shown in Fig. 2.
The pulling device 5 is mounted on the platform 23 between the secondary beams 27, 29 and adjacent the main beam 25. The pulling device 5 is universally mounted on the plat-` form 23. To this end, as shown in Figs. 5 and 6, the pulling device 5 is mounted axially within a short. square-cross sectioned,~ `
~` 10 tubular sleeve 35~ A first pair of axially aligned pivot pins 37 r 39 are fixed in diametrically opposed relation to a reinforced axial projection 12 having a ~ore 14 of the cylindrical housing 11 of pulling device 5 near its bottom end 17. The pivot pins 37, 39 are rotatably mounted in opposed vertical walls 41, 43 .. , of sleeve 35. The other two vertical walls 45, 47 of the sleeve , 35 carry a second pair of axially aligned, oppositely facing, pivot pins 49, 51. The axis of aligned pins 49, 51 intersects ;
the axis of aligned pins 37, 39 and also the axis of the cylin-drical housing 11. The second pair of pivot pins 49, 51 are rotatably mounted in a pair of cantilevered, space~-apart arms 53, 55 projecting from main beam 25 of the platform. Arms 53, 55 are adjacent the secondary beams 27, 29 respectively. The first and second set of pivot pins 37, 39 and 49, 51 permit the generally upright pulling device 5 to swivel so as to align axially with non-vertical anchoring devices 3 as shown in Fig. 3.
The platform 25 has attaching means 61 at one end for use in mounting it on a carrying vehicle. The carrying vehicle can be a tractor and the testing apparatus 1 is mounted on the front of the tractor by way of the attaching means 61. These attaching means 61 preferably comprise a generally rectangular mounting plate 63 and two pair of brackets 65, 67, each consisting _ of spaced-apart support plates 69, 71. The support plates 69, 71 _ 4 _ ~7~;8~5 of each bracket pair 65, 67 are fixed to the inner surface 73 of mounting plate 63 and extend perpendicular to plate 63 extending well above its top edge 75. The free end 77 of secondary beam 27 is pivotably mounted between support plates, 69, 71 of bracket 65 by a first horizontal pin 79 and the free end 81 of secondary beam 29 is pivotably mounted between support plates 69, 71 of bracket 67 by a second horizontal pin 83. Pins 79, 83 are axially aligned. Platform 25 is thus free to rotate about pins 79, 83.
Means are provided for lifting and lowering the platlorm 23 about pins 79, 83. The lifting and lowering means preferably comprise a pair of hydraulic units 91, 93. Each hydraulic unit 91. 93 has a cylindrical housing 9S, a piston 97 within the housing 95, as shown in Fig. 4, and a piston rod 99 projecting from the piston 97 out one end 101 of housing 95.
Each housing 95 has a pair of diametrically opposed pivot pins 103 projecting from it adjacent its other end 105. The pivot pins 103 are rotatably mounted between the upper free ends of support plates 69, 71 of brackets 65, 67. One hydraulic unit 91 is mounted to the top of bracket 65 and the other hydraulic unit 93 is mounted to the top of bracket 67. The free end 111 of the piston rod 99 of each hydraulic unit 91, 93 is pivotably mounted to a pivot pin 113 fixed between two attachment plates 115, 117. Plates 115, 117 project up from the secondary beams 29, 31, and are located slightly nearer to main beam 2S than to mounting plate 63. Actuation of the hydraulic units 91, 93, in unison will raise or lower the platform 23 about pivot pins 79, 83.
Support means are provided at the other end of the platform 23. The support means can comprise a pair of ground support members 123, 125, one support member 123 located at . . .
1~'7683~
one end of the main platform beam 25, the other support member 125 located at the other end of the main beam 25. Support members 123, 125 are ide~tical. Each comprises a hydraulic unit 131 extending generally vertically. Each hydraulic unit 131 comprises a cylindrical housing 133, a piston 135 slidable in the housing 133, as shown in Fig. 4 and a piston rod 137 projecting from the piston 135 out of the bottom end 139 of the housing 133. The upper end 141 of each housing 133 is pivotably connected by a pivot pin 143 to the free ends 145 of a pair of cantilevered support arms 147 extending up and out from the end of the main beam 25. Each pair of arms 147 extends perpendicular to main beam 25 and are rigidly fixed to beam 27. They could however, if desired, be mounted for rotation about a vertical axis on the ends of main beam 25.
The bottom of piston rod 137 of each hydraulic unit 131 is fixed to a pad plate 149. Plate 149 is relatively large !and, when operational, rests on the ground to distribute load over a relatively large area. The plate 149 has a tubular element 151 centrally located thereon and extending vertically, perpendicular to the plate. Piston rod 137 is fixed to tubular element 151. Triangular plates 153 can be provided, joined to tubular element 151 and plate 149 to act as reinforcing ribs.
A hydraulic system is provided to operate hydraulic - units 5, 91, 93 and 131. One suitable system is shown in Fig. 4.This system has a hydraulic fluid reservoir 161 and a feed line 163 leading therefrom to a pump 165 operated by a motor 167.
From the pump 165, the hydraulic fluid passes through line 169 to a two-way valve 171 which directs fluid simultaneously to either end of cylinders 95 forming part of the hydraulic units 91, 93, and back through valve 171 to line 169. The units 91, 93 act in unison to raise or lower platform 23. ~hine 169 :~>7683S
continues to a by-pass valve 173. From by-pass valve 173, a return line 175 leads back to reservoir 161. A branch line 177 leads from line 169 to a second two-way valve 179 operating one hydraulic unit 131, ~rom valve 179 to a second :
two-way valve 181 operating the second hydraulic unit 131, and from valve 181 back to line 169. The height o~ each pad plate 149 can thus be individually adjusted by its own hydraulic unit 131.
From by-pass valve 173, a feed line 185 leads to a reservoir 187 which feeds fluid, via line 189, to a second pump 191 operated by motor 193. From pump 191, line 195 leads to a two-way valve 197, to hydraulic pulling device 5, back through two-way valve 197,and back to return line 175. A pressure indicating gauge 199 can be provided in line 195 leading to hydraulic pulling device 5. The secondary hydraulic circuit, defined by lines 185, 189 and 195, provides for a controlled amount of pressure to be applied to hydraulic pulling device :
5, and thus to be coupled ~o anchQr 3 which is to be tested, independently of the pressure applied to hydraulic units 91, 93 and 131. The pressure applied to the pulling device 5 - can be controlled by controlling pump motor 193.
: The hydraulic system for the testing apparatus can be self-contained on the testing apparatus or it can be combined with any hydraulic system on the vehicle carrier to which the testing apparatus is attached by plate 63.
In operation, the testing apparatus 1 is transported, by a vehicle carrier, to which it is attached, to the site of the anchor to be tested. During transport, the pad plates 149 are raised or retracted by the hydraulic unit 131, and the platform 23, carrying the hydraulic pulling device 5, and the pad plates 149, is raised by the hydraulic units 91, 93.
At the test site, the platform 23 is lowered to a generally ~7i~83~
horizontal position and the vehicle carrier is maneouvered to position the hydraulic pulling device 5 generally over the anchor member 3. The upright pulling device 5 is then attached to the anchor member 3 via the coupling 19. The universal mounting of the pulling device 5 permits it to be axially ~ -aligned with the anchor member so a direct pull in an upright :.
direction can be applied to the anchor member 3. The pad plates 149 are then lowered by their hydraulic units 131 to press on the ground so as to provlde a stable support for the :
platform 23. Once the platform 23 has been stabilized, hydrau- :
lic pulling device 5 is acutated to provide an upright pull on the anchor member of a predetermined pressure for a pre-determined period of time. For example a pull of 100 ~ips can be applied for 2, or 3, minutes to the anchor. After testing the anchor, the pressure is releived, the device 5 is uncoupled from the anchor and the apparatus is moved to the next anchor to test it.
. : .. :, , ,, ~
Claims (5)
1. Apparatus for use in testing the holding power of ground anchors comprising: a pulling device adapted to be coupled to a ground anchor to apply an upright pulling force to the anchor; a platform; means mounting the pulling device on the platform; said mounting means including a universal joint for mounting the pulling device on the platform; and means on the platform for supporting the platform on the ground when testing, means for pivotably mounting one end of the platform to a vehicle mounting means, and means for raising or lowering the platform about the mounting means relative to the vehicle mounting means.
2. Apparatus as claimed in Claim 1 wherein the platform support means are mounted at the other end of the platform and are adjustable in height.
3. Apparatus as claimed in Claim 2 wherein the platform support means comprise a pair of spaced-apart pads, and means are provided for raising or lowering each pad, relative to the platform, independently of the other pad.
4. Apparatus for use in testing the holding power of ground anchors comprising a platform, a bracket at one end of the platform adapted to be mounted to a vehicle, a pair of generally vertically extending members fixed to said bracket, the platform including separate beams pivotally mounted to each of said vertically extending members and the beams extending parallel and fixed to a cross-member at the other end of the respective beams forming the platform, a pair of cantilever arms extending from the cross-member between the beams, an open tube member suspended between the cantilever members and pivotally mounted thereto through a generally horizontal axis, a hydraulic pulling cylinder pivotally mounted within the open tube by means of pins having an axis in a plane perpendicular to the pivot axis of the open tube to the cantilever members such that the hydraulic pulling member has effective universal movement; the hydraulic lifting member including a hydraulic cylinder and a piston and coupling member extending from the cylinder below the open tube and adapted to be coupled to an anchor member to be tested, at least a pair of cantilever arms extending from the cross-member outwardly of the platform and mounting hydraulic leg members, the hydraulic leg members being connected to ground support pads such that the ground support pads can be adjusted by the hydraulic legs in order to support the platform in an opera-tional position; the main platform is swung down from the vertically extending members mounted to said bracket and the bracket is mounted to a tractor vehicle.
5. Apparatus as defined in claim 1 wherein said universal joint has a tubular sleeve, said pulling device passing centrally through the sleeve; first pivot means pivotably connecting the pulling device to the sleeve for rotation about a first axis; second pivot means pivotably connecting the sleeve to the platform for rotation about a second axis; the first and second axes intersecting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA324,288A CA1076835A (en) | 1979-03-27 | 1979-03-27 | Anchor bolt tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA324,288A CA1076835A (en) | 1979-03-27 | 1979-03-27 | Anchor bolt tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1076835A true CA1076835A (en) | 1980-05-06 |
Family
ID=4113844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA324,288A Expired CA1076835A (en) | 1979-03-27 | 1979-03-27 | Anchor bolt tester |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1076835A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0186358A2 (en) * | 1984-12-10 | 1986-07-02 | Illinois Tool Works Inc. | Apparatus for measuring pull-out resistance |
| US5791820A (en) * | 1995-09-15 | 1998-08-11 | Rempel; Jake | Method and apparatus for implanting screw-in pilings or anchors in the ground |
-
1979
- 1979-03-27 CA CA324,288A patent/CA1076835A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0186358A2 (en) * | 1984-12-10 | 1986-07-02 | Illinois Tool Works Inc. | Apparatus for measuring pull-out resistance |
| EP0186358A3 (en) * | 1984-12-10 | 1987-06-16 | Illinois Tool Works Inc. | Apparatus for measuring pull-out resistance |
| US5791820A (en) * | 1995-09-15 | 1998-08-11 | Rempel; Jake | Method and apparatus for implanting screw-in pilings or anchors in the ground |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4809933A (en) | Portable aircraft arresting apparatus | |
| US6474926B2 (en) | Self-erecting mobile concrete batch plant | |
| US4273244A (en) | Crane upperstructure self-transferring system | |
| US4257491A (en) | Scaffold apparatus | |
| US3934739A (en) | Self-erecting surge storage system | |
| AU665362B2 (en) | Self-closing clamping apparatus | |
| US4508232A (en) | Counterbalanced crane structure | |
| US3942368A (en) | Portable pull testing unit for installed earth anchors | |
| US5145286A (en) | Earth anchor driving and removing apparatus and method therefore | |
| CA1076835A (en) | Anchor bolt tester | |
| US5040927A (en) | Pressure driver for pilings | |
| CN113795642B (en) | Tool arrangement for pivoting a tower or a tower section from a non-erected position to an erected position | |
| US2823911A (en) | Portable heavy-duty weighing scale | |
| US4995518A (en) | Detachable floating counterweight | |
| CZ285714B6 (en) | Process of straightening a body of a motor vehicle and apparatus for making the same | |
| JPH01161130A (en) | Load tester | |
| US4543030A (en) | Fifth wheel wrecker hoist | |
| GB1564493A (en) | Apparatus for supporting pipelines | |
| US20210078835A1 (en) | Devices And Methods For Lifting Precast Concrete Domes | |
| CA2005386C (en) | Portable self-erecting asphalt storage apparatus and method of erecting same | |
| US3809115A (en) | Remote control apparatus | |
| US4174061A (en) | Portable apparatus for fabricating wooden trusses | |
| CA1090526A (en) | Mast leveling and support apparatus | |
| CA1177448A (en) | Quick attachment device | |
| KR101700852B1 (en) | Hand crane for safety diagmosis of highness section |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |