CN109555169B - Cement soil pile corrosion depth testing device - Google Patents
Cement soil pile corrosion depth testing device Download PDFInfo
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- CN109555169B CN109555169B CN201811597173.0A CN201811597173A CN109555169B CN 109555169 B CN109555169 B CN 109555169B CN 201811597173 A CN201811597173 A CN 201811597173A CN 109555169 B CN109555169 B CN 109555169B
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- 239000002689 soil Substances 0.000 title claims abstract description 80
- 239000004568 cement Substances 0.000 title claims abstract description 72
- 238000012360 testing method Methods 0.000 title claims abstract description 40
- 230000007797 corrosion Effects 0.000 title claims abstract description 39
- 238000005260 corrosion Methods 0.000 title claims abstract description 39
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 140
- 239000010959 steel Substances 0.000 claims abstract description 140
- 239000000523 sample Substances 0.000 claims abstract description 52
- 238000006243 chemical reaction Methods 0.000 claims description 27
- 238000003466 welding Methods 0.000 claims description 19
- 230000005540 biological transmission Effects 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 5
- 230000003628 erosive effect Effects 0.000 abstract description 5
- 230000007774 longterm Effects 0.000 abstract description 4
- 230000008859 change Effects 0.000 abstract description 3
- 230000035515 penetration Effects 0.000 description 7
- 230000002238 attenuated effect Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
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- 230000009545 invasion Effects 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000011158 quantitative evaluation Methods 0.000 description 1
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- 230000002787 reinforcement Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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Abstract
The invention belongs to the technical field of geotechnical engineering and soil mechanics, and relates to a cement soil pile corrosion depth testing device, wherein a beam is welded on a base bracket, a motor supporting plate is arranged on the beam, a motor is arranged on the motor supporting plate, a counterforce plate is arranged on the opposite side of a cement soil pile to be tested, and counterforce surface rectangular steel pipes are symmetrically arranged on the counterforce plate; one end of the counterforce frame is welded with the counterforce surface rectangular steel tube, the other end of the counterforce frame is connected with one end of the connecting rod, the other end of the connecting rod is fixedly connected with the steel blade, the steel blade is welded at the top end of the base bracket, the force application rod is arranged on the cross beam, steel teeth are welded on two symmetrical surfaces of the force application rod, a spoke sensor is arranged between the force application rod and the probe rod, and the bottom of the probe rod is welded with the probe; the cement pile corrosion depth measuring device is scientific in design, simple in structure, excellent, comprehensive and reliable in testing performance, high in operability and low in cost, and can intuitively reflect the cement pile corrosion depth and the strength change in an erosion environment, so that the cement pile corrosion depth and long-term bearing capacity are quantified.
Description
Technical field:
the invention belongs to the technical field of geotechnical engineering and soil mechanics, relates to quantitative evaluation equipment for corrosion depth of a cement soil pile, in particular to a cement soil pile corrosion depth testing device which can directly test the corrosion depth of the cement soil pile in an erosion environment and is used for quantifying the corrosion depth of cement soil and predicting long-term bearing capacity of the cement soil pile in the erosion environment.
The background technology is as follows:
the cement soil pile has the advantages of strong integrity, flexible design, convenient construction, low noise, low cost, small additional settlement caused and the like, is widely applied to land and hydraulic engineering as a composite foundation of a building (construction), an anti-seepage waterproof curtain, a supporting structure and the like, and particularly plays an irreplaceable role in the construction engineering of southeast coastal areas in China along with the expansion of the engineering scale of cross-sea bridges, submarine tunnels, ports and coasts, and a foundation treatment method represented by cement soil. Many foundation soils are gradually corrosive due to environmental deterioration, industrial pollution aggravation, agricultural irrigation scientificity, increase of household garbage, seawater invasion and other reasons. The cement soil in the corrosion site for a long time can have the degradation phenomena of strength attenuation, permeability increase, effective reinforcement range reduction and the like under the action of aggressive media, so that the mechanical property and durability of the cement soil can be obviously reduced, and the service life of the cement soil is shortened. Japanese scholars Ikegami and the like find that the surface strength of large cement soil in the middle age of a certain coastal field for 20 years is obviously attenuated within the range of 30-50 mm, and the cement soil piles are eroded from the outside to the inside due to the erosion effect of the environment, so that the cement soil piles become an uneven body. However, no device or method for reasonably, effectively and directly testing the corrosion depth of the cement soil pile is disclosed and reported at present. Therefore, the design of the cement soil pile corrosion depth testing device has strong theoretical and engineering significance, and provides theoretical basis for the design and construction of cement soil piles in corrosion sites.
The invention comprises the following steps:
the invention aims to provide a cement pile corrosion depth testing device which is designed to solve the defects in the prior art, simply and accurately test the corrosion depth of the cement pile in service, predict the long-term bearing capacity of the cement pile in an erosion environment, and not only can test the cement pile exposed to bridges, ports and the like, but also can test the cement pile buried below the ground of buildings and the like.
In order to achieve the above purpose, the main structure of the cement soil pile corrosion depth testing device comprises a base bracket, a counter-force nut, a counter-force plate, a force application rod, a probe rod, bolts, nuts, a counter-force frame, a connecting rod, a counter-force surface rectangular steel pipe, a spoke sensor, a motor, a gear, steel teeth, a cross beam, a motor supporting plate, steel skips and inclined supports; the transverse beam is welded on the symmetrical axis of the base support, the transverse beam is fixed with the base support through an inclined support, a motor supporting plate is mounted on the transverse beam, bolt holes for fixing the motor are reserved on the motor supporting plate, the size and the position of the bolt holes are determined according to the size and the position of corresponding bolt holes of the motor, the motor is fixedly mounted on the motor supporting plate through high-strength bolts, a counterforce plate is mounted on the opposite side of a cement soil pile to be tested, and counterforce surface rectangular steel pipes are symmetrically mounted on the counterforce plate; one end of the reaction frame is welded with the reaction surface rectangular steel tube, the other end of the reaction frame is connected with one end of the connecting rod through a reaction nut, the other end of the connecting rod is fixedly connected with the steel blade through a bolt and a nut, the steel blade is welded at the top end of the base support, the force application rod is perpendicular to the direction of the cross beam and is arranged on the cross beam, steel teeth are welded on two symmetrical surfaces of the force application rod of the rectangular steel tube structure, the tooth pitch of the gear is matched with the tooth pitch in the steel teeth, the steel teeth on one surface are tightly meshed with the gear, the steel teeth on the other surface are tightly meshed with the gear on the motor, the gear is arranged on the cross beam, spoke sensors are arranged between the force application rod and the probe rod, and a probe is welded at the bottom of the probe rod.
The base bracket is formed by welding rectangular steel pipes, the length of the rectangular steel pipes is 60cm, the width of the rectangular steel pipes is 30cm, the height of the rectangular steel pipes is 40cm, and the specification of the rectangular steel pipes is 30mm multiplied by 60mm and the thickness of the rectangular steel pipes is 2mm in order to improve the stability and rigidity of the base bracket; the counter-force nut is formed by welding a nut and a round steel pipe with a threading on the outer surface, the outer diameter of the round steel pipe is not less than 30mm, and the diameter of the nut is determined according to the diameter of the round steel pipe; the reaction plate is a square steel plate, has the length of 80cm, the width of 50cm and the plate thickness of 3mm and is used for providing enough reaction force; the force application rod is formed by welding a rectangular steel pipe and steel teeth, the length of the force application rod is 30cm, the specification of the rectangular steel pipe is 30mm multiplied by 60mm, and the thickness of the rectangular steel pipe is 2mm; the diameter of the probe is 60mm, and the height is 40mm; the probe rod is a round steel pipe with the length of 20cm, the diameter of the round steel pipe is 40mm, and the thickness of the round steel pipe is 2mm; the bolts and the nuts are respectively high-strength bolts and nuts, wherein the specification of the bolts is M10×60; the counter-force frame is a round steel pipe with the length of 20cm, the diameter of 40mm and the thickness of 2mm; the connecting rod is a round steel pipe, the length of the connecting rod is 20cm, the diameter of the connecting rod is 40mm, the thickness of the connecting rod is 2mm, and one end of the connecting rod is drilled with a hole with the diameter of 12 mm; the rectangular steel pipe with the counterforce surface is a rectangular steel pipe with the thickness of 30mm multiplied by 60mm and the thickness of 2mm; the measuring range of the spoke sensor is 50MPa, and the transmission wire of the spoke sensor is transmitted from the top end of the spoke sensor so as to be convenient for the transmission wire to be led out; the motor adopts a two-phase electric motor, so that the power supply is convenient to connect; the cross beam is a rectangular steel pipe, the specification of the cross beam is 30mm multiplied by 60mm, and the thickness of the cross beam is 2mm; the motor supporting plate is a rectangular steel plate, the size of the motor supporting plate is determined according to the size of the motor, and the thickness of the steel plate is 3mm; the steel cutter is a round steel pipe, the outer diameter is 36mm, the thickness is 2mm, the height is 4cm, and a drill hole with the diameter of 1cm is drilled on the steel cutter; the inclined support is a rectangular steel pipe, the specification of which is 30mm multiplied by 60mm, and the thickness of which is 2mm.
The concrete process for testing the corrosion depth of the cement soil pile comprises the following steps:
(1) Firstly, welding a base bracket, welding a cross beam and an inclined strut to the base bracket, ensuring that the cross beam is welded to a symmetrical axis of the base bracket, determining the position of a motor after the cross beam is welded, and welding a motor supporting plate to the cross beam;
(2) The steel teeth are welded on the two surfaces of the force application rod, the gear and the force application rod welded with the steel teeth are installed, the gear and the force application rod are guaranteed not to loosen, after the fixing is finished, the motor is installed on the motor supporting plate through the high-strength bolt, and tight occlusion between the gear and the steel teeth on the motor is guaranteed;
(3) After the force application rod is installed, the spoke sensor is installed between the force application rod and the probe rod by using the bolt, the bolt is prevented from loosening when screwed, and a transmission wire of the spoke sensor penetrates out of the rod of the force application rod and is led to an external detection device; after the spoke sensor is installed, the probe is welded to the bottom end of the probe rod;
(5) The steel cutting is welded to the top end of the reaction frame, the connecting rod and the reaction frame are connected together through the reaction nut, and then the connecting rod and the steel cutting are fixed together through the bolt and the nut, so that the whole device is installed;
(5) After the device is installed, digging a soil groove with the height similar to that of the device on one side of the cement soil pile to be tested, placing a counter-force plate on the opposite side of the cement soil pile to be tested, placing the whole device into the soil groove, and adjusting four counter-force nuts to enable the whole device to be tightly close together between the cement soil pile and the counter-force plate, so that the cement soil pile cannot loosen;
(6) And adjusting the probe to enable the probe to be clung to the surface of the cement soil pile to be tested, connecting the spoke sensor to a test computer through a transmission wire after the probe is adjusted, debugging, then starting a power supply to test, determining whether the cement soil is corroded or not through the spoke sensor test value displayed by the test computer, and determining the corrosion depth of the cement soil pile through the working time of the motor.
Before the invention is used, the rotating speed of the motor is firstly determined, the penetration depth of the probe is converted according to the rotating speed and the rotating time of the motor, before the measurement, the probe is regulated to be clung to the surface of the soil pile to be measured, after the probe is regulated in place, the reading of the spoke sensor is determined, the test is carried out after the reading is cleared, the corrosion depth of the soil pile to be measured is determined according to the rotating time and the rotating speed of the motor, and the concrete strength of the soil pile to be measured is directly measured according to the spoke sensor.
Compared with the prior art, the invention has scientific design, simple structure, superior, comprehensive and reliable testing performance, high operability and low cost, and can intuitively reflect the corrosion depth of the cement soil pile and the change of the strength in the corrosion environment, thereby quantifying the corrosion depth and the long-term bearing capacity of the cement soil pile.
Description of the drawings:
fig. 1 is a schematic diagram of the main structure of the cement soil pile corrosion depth testing device.
Fig. 2 is a detailed view of the force applying rod and the counter nut of the present invention.
Fig. 3 is a detailed view of the installation of the force applying rod, the gear and the motor according to the invention.
Fig. 4 is a top view of the main structure of the device for testing the corrosion depth of the soil cement pile.
Fig. 5 is a front view of the main structure of the cement soil pile corrosion depth testing device.
FIG. 6 is a side view of the main structure of the device for testing the corrosion depth of the soil cement pile.
FIG. 7 is a graph of probe drag versus penetration depth variation according to an embodiment of the present invention.
FIG. 8 is a graph of etch depth according to an embodiment of the present invention.
The specific embodiment is as follows:
the invention will now be described by way of example with reference to the accompanying drawings.
Examples:
the main structure of the cement soil pile corrosion depth testing device comprises a base bracket 1, a counter-force nut 2, a counter-force plate 3, a force application rod 4, a probe 5, a probe rod 6, a bolt 7, a nut 8, a counter-force frame 9, a connecting rod 10, a counter-force surface rectangular steel pipe 11, a spoke sensor 12, a motor 13, a gear 14, steel teeth 15, a cross beam 16, a motor supporting plate 17, a steel cutter 18 and an inclined support 19; the beam 16 is welded on the symmetrical axis of the base bracket 1, the beam 16 and the base bracket 1 are fixed through an inclined support 19, a motor supporting plate 17 is mounted on the beam 16, bolt holes for fixing the motor 13 are reserved on the motor supporting plate 17, the size and the position of the bolt holes are determined according to the corresponding bolt hole size and the position of the motor 13, the motor 13 is fixedly mounted on the motor supporting plate 17 by adopting high-strength bolts, the counter-force plate 3 is mounted on the opposite side of the cement soil pile to be tested, and the counter-force plate 3 is symmetrically provided with counter-force rectangular steel pipes 11; one end of the reaction frame 9 is welded with the reaction surface rectangular steel tube 11, the other end is connected with one end of the connecting rod 10 through the reaction nut 2, the other end of the connecting rod 10 is fixedly connected with the steel chip 18 through the bolt 7 and the nut 8, the steel chip 18 is welded at the top end of the base support 1, the force application rod 4 is arranged on the cross beam 16 in a direction perpendicular to the cross beam 16, steel teeth 15 are welded on two symmetrical surfaces of the force application rod 4 of the rectangular steel tube structure, the tooth pitch of the gear 14 is matched with the tooth pitch of the steel teeth 15, the steel teeth 15 on one surface are tightly meshed with the gear 14, the steel teeth 15 on the other surface are tightly meshed with the gear on the motor 13, the gear 14 is arranged on the cross beam 16, a spoke sensor 12 is arranged between the force application rod 4 and the probe rod 6, and the bottom of the probe rod 6 is welded with the probe 5.
The base support 1 is formed by welding rectangular steel pipes, the length of the rectangular steel pipes is 60cm, the width of the rectangular steel pipes is 30cm, the height of the rectangular steel pipes is 40cm, and in order to improve the stability and rigidity of the base support 1, the specifications of the rectangular steel pipes are 30mm multiplied by 60mm, and the thickness of the rectangular steel pipes is 2mm; the counter-force nut 2 is formed by welding a nut 2-1 and a round steel pipe 2-2 with a threading on the outer surface, the outer diameter of the round steel pipe 2-2 is not less than 30mm, and the diameter of the nut 2-1 is determined according to the diameter of the round steel pipe 2-2; the reaction plate 3 is a square steel plate with the length of 80cm, the width of 50cm and the plate thickness of 3mm and is used for providing enough reaction force; the force application rod 4 is formed by welding a rectangular steel pipe and steel teeth 13, the length of the force application rod is 30cm, the specification of the rectangular steel pipe is 30mm multiplied by 60mm, and the thickness of the rectangular steel pipe is 2mm; the diameter of the probe 5 is 60mm, and the height is 40mm; the probe rod 6 is a round steel pipe with the length of 20cm, the diameter of the round steel pipe is 40mm, and the thickness of the round steel pipe is 2mm; the bolt 7 and the nut 8 are respectively a high-strength bolt and a high-strength nut, wherein the specification of the bolt 7 is M10×60; the reaction frame 9 is a round steel pipe with the length of 20cm, the diameter of 40mm and the thickness of 2mm; the connecting rod 10 is a round steel pipe, the length is 20cm, the diameter is 40mm, the thickness is 2mm, and one end is drilled with a hole with the diameter of 12 mm; the reaction surface rectangular steel pipe 11 is a rectangular steel pipe having a thickness of 2mm and a thickness of 30mm×60 mm; the measuring range of the spoke sensor 12 is 50MPa, and a transmission wire of the spoke sensor is transmitted from the top end of the spoke sensor 12 so as to be convenient for going out of the transmission wire; the motor 13 is a two-phase electric motor, so that the power supply is conveniently connected; the cross beam 16 is a rectangular steel pipe, the specification of which is 30mm multiplied by 60mm, and the thickness of which is 2mm; the motor support plate 17 is a rectangular steel plate, the size of which is determined according to the size of the motor 12, and the thickness of the steel plate is 3mm; the steel chip 18 is a round steel pipe, the outer diameter is 36mm, the thickness is 2mm, the height is 4cm, and a drill hole with the diameter of 1cm is drilled on the steel chip 18; the diagonal brace 19 is a rectangular steel tube with a gauge of 30mm by 60mm and a thickness of 2mm.
The concrete process for testing the corrosion depth of the cement soil pile in the embodiment comprises the following steps:
(1) Firstly, welding a base bracket 1, then welding a cross beam 16 and a diagonal brace 19 on the base bracket 1, ensuring that the cross beam 16 is welded on the symmetry axis of the base bracket 1, determining the position of a motor 13 after the cross beam 16 is welded, and welding a motor supporting plate 17 on the cross beam 16 as shown in fig. 4;
(2) The steel teeth 15 are welded on the two surfaces of the force application rod 4, the gear 14 and the force application rod 4 welded with the steel teeth 15 are installed, the gear 14 and the force application rod 4 are guaranteed not to loosen, after the fixing is finished, the motor 13 is installed on the motor supporting plate 17 through high-strength bolts, and tight occlusion between the gear 14 on the motor 13 and the steel teeth 15 is guaranteed;
(3) After the force application rod 4 is installed, the spoke sensor 12 is installed between the force application rod 4 and the probe rod 6 by using bolts, the bolts are ensured not to be loosened when being screwed, and a transmission wire of the spoke sensor 12 is penetrated out of the rod of the force application rod 4 and is led to an external detection device; after the spoke sensor 12 is installed, the probe 5 is welded to the bottom end of the probe rod 6;
(5) The steel clip 18 is welded to the top end of the reaction frame 1, as shown in fig. 5, the connecting rod 10 and the reaction frame 9 are connected together through the reaction nut 2, and then the connecting rod 9 and the steel clip 18 are fixed together through the bolt 7 and the nut 8, so that the whole device is installed;
(5) After the device is installed, digging a soil groove with the height similar to that of the device on one side of the cement soil pile to be tested, placing a counter-force plate 3 on the opposite side of the cement soil pile to be tested, as shown in fig. 1, placing the whole device into the soil groove, and adjusting four counter-force nuts 2 to enable the whole device to be tightly close together between the cement soil pile and the counter-force plate 3, so that the cement soil pile to be tested cannot loosen;
(6) And adjusting the probe 5 to enable the probe 5 to be clung to the surface of the cement soil pile to be tested, connecting the spoke sensor 12 to a test computer through a transmission wire after the probe 5 is adjusted, debugging, then starting a power supply to test, determining whether the cement soil is corroded according to the test value of the spoke sensor 12 displayed by the test computer, and determining the corrosion depth of the cement soil pile according to the working time of the motor.
Before the test method is used, the rotating speed of the motor is firstly determined, the penetration depth of the probe is converted according to the rotating speed and the rotating time of the motor, before measurement, the probe 5 is adjusted to be clung to the surface of the soil pile to be tested, after the probe 5 is adjusted in place, the reading of the spoke sensor 12 is determined, the test is carried out after the reading is cleared, the corrosion depth of the soil pile to be tested is determined according to the rotating time and the rotating speed of the motor, and the concrete strength of the soil pile surface to be tested is directly measured according to the spoke sensor 12.
In this embodiment, the cement soil pile with the current service period of one year is subjected to corrosion depth test, and the test data are as follows:
the graph of probe resistance and penetration depth is shown in fig. 7, and the graph shows that the probe resistance is continuously increased along with the increase of the penetration depth, reflects the change of the cement soil strength, can be roughly divided into three stages, namely a strength slow-increasing section, a linear-increasing section and a relatively stable section according to the characteristic of the probe resistance curve, and the probe resistance slowly increases at the initial penetration stage, namely at the surface of a pile body, so that the strength of the cement soil is attenuated, namely the cement soil pile is corroded, and the probe resistance linearly increases along with the increase of the penetration depth, so that the cement soil is corroded to a certain extent, and the cement soil is attenuated to a certain extent; the relatively stable section shows that the cement soil is not corroded, and the strength is not obviously attenuated; the corrosion depth can quantify the corrosion degree of the cement soil, and the specific principle is that a straight line is fitted to the part of the curve shown in fig. 7 where the strength starts to be exerted, and the intersection point of the straight line and the vertical axis is used as the corrosion depth dn as shown in fig. 8.
Claims (2)
1. The cement soil pile corrosion depth testing device is characterized by comprising a base bracket, a counter-force nut, a counter-force plate, a force application rod, a probe rod, a bolt, a nut, a counter-force frame, a connecting rod, a counter-force surface rectangular steel pipe, a spoke sensor, a motor, a gear, steel teeth, a cross beam, a motor supporting plate, a steel cutter and an inclined support; the transverse beam is welded on the symmetrical axis of the base support, the transverse beam is fixed with the base support through an inclined support, a motor supporting plate is mounted on the transverse beam, bolt holes for fixing the motor are reserved on the motor supporting plate, the size and the position of the bolt holes are determined according to the size and the position of corresponding bolt holes of the motor, the motor is fixedly mounted on the motor supporting plate through high-strength bolts, a counterforce plate is mounted on the opposite side of a cement soil pile to be tested, and counterforce surface rectangular steel pipes are symmetrically mounted on the counterforce plate; one end of the counterforce frame is welded with the counterforce surface rectangular steel tube, the other end of the counterforce frame is connected with one end of the connecting rod through a counterforce nut, the other end of the connecting rod is fixedly connected with the steel blade through a bolt and a nut, the steel blade is welded at the top end of the base bracket, the force application rod is arranged on the cross beam perpendicular to the direction of the cross beam, steel teeth are welded on two symmetrical surfaces of the force application rod of the rectangular steel tube structure, the tooth pitch of the gear is matched with the tooth pitch in the steel teeth, the steel teeth on one surface are tightly meshed with the gear, the steel teeth on the other surface are tightly meshed with the gear on the motor, the gear is arranged on the cross beam, a spoke sensor is arranged between the force application rod and the probe rod, and a probe is welded at the bottom of the probe rod;
the concrete process for realizing the cement soil pile corrosion depth test by adopting the device comprises the following steps:
(1) Firstly, welding a base bracket, welding a cross beam and an inclined support to the base bracket, ensuring that the cross beam is welded to a symmetry axis of the base bracket, determining the position of a motor after the cross beam is welded, and welding a motor supporting plate to the cross beam;
(2) The steel teeth are welded on the two surfaces of the force application rod, the gear and the force application rod welded with the steel teeth are installed, the gear and the force application rod are guaranteed not to loosen, after the fixing is finished, the motor is installed on the motor supporting plate through the high-strength bolt, and tight occlusion between the gear and the steel teeth on the motor is guaranteed;
(3) After the force application rod is installed, the spoke sensor is installed between the force application rod and the probe rod by using the bolt, the bolt is prevented from loosening when screwed, and a transmission wire of the spoke sensor penetrates out of the rod of the force application rod and is led to an external detection device; after the spoke sensor is installed, the probe is welded to the bottom end of the probe rod;
(4) Welding the steel scraps to the top end of the base bracket, connecting the connecting rod with the reaction frame through the reaction nut, and fixing the connecting rod with the steel scraps through the bolt and the nut after the connecting rod is connected with the reaction frame through the reaction nut, so that the whole device is installed;
(5) After the device is installed, digging a soil groove with the height similar to that of the device on one side of the cement soil pile to be tested, placing a counter-force plate on the opposite side of the cement soil pile to be tested, placing the whole device into the soil groove, and adjusting four counter-force nuts to enable the whole device to be tightly close together between the cement soil pile and the counter-force plate, so that the cement soil pile cannot loosen;
(6) And adjusting the probe to enable the probe to be clung to the surface of the cement soil pile to be tested, connecting the spoke sensor to a test computer through a transmission wire after the probe is adjusted, debugging, then starting a power supply to test, determining whether the cement soil is corroded or not through the spoke sensor test value displayed by the test computer, and determining the corrosion depth of the cement soil pile through the working time of the motor.
2. The cement-soil pile corrosion depth testing device according to claim 1, wherein the base support is formed by welding rectangular steel pipes, the length of the rectangular steel pipes is 60cm, the width of the rectangular steel pipes is 30cm, the height of the rectangular steel pipes is 40cm, and in order to improve the stability and rigidity of the base support, the specifications of the rectangular steel pipes are 30mm multiplied by 60mm, and the thickness of the rectangular steel pipes is 2mm; the counter-force nut is formed by welding a nut and a round steel pipe with a threading on the outer surface, the outer diameter of the round steel pipe is not less than 30mm, and the diameter of the nut is determined according to the diameter of the round steel pipe; the reaction plate is a square steel plate, has the length of 80cm, the width of 50cm and the plate thickness of 3mm, and is used for providing enough reaction force; the force application rod is formed by welding a rectangular steel pipe and steel teeth, the length of the force application rod is 30cm, the specification of the rectangular steel pipe is 30mm multiplied by 60mm, and the thickness of the rectangular steel pipe is 2mm; the diameter of the probe is 60mm, and the height is 40mm; the probe rod is a round steel pipe with the length of 20cm, the diameter of the round steel pipe is 40mm, and the thickness of the round steel pipe is 2mm; the bolts and the nuts are respectively high-strength bolts and nuts, wherein the specification of the bolts is M10×60; the reaction frame is a round steel pipe, the length is 20cm, the diameter is 40mm, and the thickness is 2mm; the connecting rod is a round steel pipe, the length is 20cm, the diameter is 40mm, the thickness is 2mm, and one end is drilled with a hole with the diameter of 12 mm; the reaction surface rectangular steel pipe is 30mm ×60mm rectangular steel pipe with thickness of 2mm; the measuring range of the spoke sensor is 50MPa, and the transmission wire of the spoke sensor is transmitted from the top end of the spoke sensor so as to be convenient for the transmission wire to be led out; the motor adopts a two-phase electric motor, so that the power supply is convenient to connect; the cross beam is a rectangular steel pipe, the specification of the cross beam is 30mm multiplied by 60mm, and the thickness of the cross beam is 2mm; the motor supporting plate is a rectangular steel plate, the size of the motor supporting plate is determined according to the size of the motor, and the thickness of the steel plate is 3mm; the steel cutter is a round steel pipe, the outer diameter is 36mm, the thickness is 2mm, the height is 4cm, and a drill hole with the diameter of 1cm is drilled on the steel cutter; the inclined support is a rectangular steel pipe, the specification of which is 30mm multiplied by 60mm, and the thickness of which is 2mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811597173.0A CN109555169B (en) | 2018-12-26 | 2018-12-26 | Cement soil pile corrosion depth testing device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811597173.0A CN109555169B (en) | 2018-12-26 | 2018-12-26 | Cement soil pile corrosion depth testing device |
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| CN109555169A CN109555169A (en) | 2019-04-02 |
| CN109555169B true CN109555169B (en) | 2023-11-14 |
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