CN112012253A - Split type fast loading method pile foundation detection device and method thereof - Google Patents
Split type fast loading method pile foundation detection device and method thereof Download PDFInfo
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- CN112012253A CN112012253A CN202010890652.2A CN202010890652A CN112012253A CN 112012253 A CN112012253 A CN 112012253A CN 202010890652 A CN202010890652 A CN 202010890652A CN 112012253 A CN112012253 A CN 112012253A
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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
Abstract
The invention discloses a split type fast loading method pile foundation detection device and a method thereof. The detection device comprises an equipment bracket, a guide device, a lifting-releasing device, a designed detection counterweight and a signal detection system; the guide device comprises a guide rod; the lift-release device comprises a lift device and a release device; a lifting device mounted on the equipment support and connected with the lift-release device through a hinge; the lifting-releasing device comprises a bearing platform, a releasing pin bolt and a releasing groove which is arranged along the radial direction of the bearing platform; the bearing platform is sleeved with the guide rod through the bottom of the release groove, and the release pin bolt can be loaded/unloaded between the notches of the release groove; the detection counterweight is sleeved on the periphery of the guide rod and arranged right opposite to the release groove. The invention makes up the defects of long test time, high cost and low efficiency of the static load method and the defects of difficult data interpretation and large human factors of the high strain method, and is suitable for foundation piles, inclined piles, grouped piles and various pile types for water operation.
Description
Technical Field
The invention relates to the field of pile foundation detection, in particular to a split type fast loading method pile foundation detection device and a method thereof.
Background
The pile foundation is one of the most main foundation forms in bridge engineering, and whether the bearing capacity of the pile foundation meets the design requirements or not is related to the safety of a bridge structure. At present, the pile foundation bearing capacity detection mainly comprises a static load test method and a high strain dynamic test method. The static load test method is the most direct and reliable test method for detecting the vertical compressive bearing capacity of the foundation pile, but the test method needs pile loading or anchor pile loading, and has the disadvantages of large pile bearing capacity, severe construction environment, long detection time, high detection cost and great application limitation. The high strain dynamic test method is a method for indirectly obtaining the bearing capacity of the pile foundation, the test method is quick and portable, the cost is lower compared with a static load test method, but the evaluation error of the bearing capacity is larger and the reliability is lower compared with the static load test method.
Disclosure of Invention
Based on the defects of the existing pile foundation bearing capacity detection method, the invention designs a split type rapid loading method pile foundation detection device, so as to provide a new pile foundation bearing capacity test method: and (5) measuring the pile by a quick loading method. The method is rapid, portable, high in test efficiency and relatively credible in test result. The action time of the rapid loading method for measuring the pile load can reach 100-300 ms, and the stress and displacement generated on the pile body are closer to those of static load pile test, so the method is called as the rapid loading method. The quick-loading method for measuring the pile overcomes the defects of long test time, high cost and low efficiency of a static loading method and the defects of easy damage of a pile head, difficult data interpretation and large human factors of a dynamic loading method, is not limited by the pile type, the pile inclination and the environment around the pile, and is particularly suitable for inclined piles, grouped piles and various pile types for overwater operation.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
a split type fast loading method pile foundation detection device comprises an equipment support, a guide device, a lifting-releasing device, a design detection counterweight and a signal detection system; wherein:
the signal detection system is arranged above the pile foundation to be detected;
the guide device comprises a guide rod; the upper end of the guide rod is fixed with the equipment support, and the lower end of the guide rod is suspended above the signal detection system and can be attached to the signal detection system;
the lifting-releasing device comprises a lifting device and a releasing device;
the lifting device is arranged on the equipment bracket and is connected with the lifting-releasing device through a hinge; the releasing device can move along the actuating direction of the lifting device under the power drive of the lifting device, and the actuating direction of the lifting device is parallel to the extending direction of the guide rod;
the release device comprises a bearing platform, a release pin bolt and a release groove which is formed along the radial direction of the bearing platform; the bottom of the release groove is positioned at the central part of the bearing platform, and the notch of the release groove is arranged by penetrating through the peripheral circular surface of the bearing platform; the bearing platform is sleeved with the guide rod through the groove bottom of the release groove, the shape of the groove bottom of the release groove is matched with the periphery of the guide rod, and the release pin bolt can be loaded/unloaded between the groove openings of the release groove;
the design detection counterweight is sleeved on the periphery of the guide rod and arranged opposite to the release groove; when the release hydrant is loaded between the notches of the release slot, the detection counterweight is designed to be supported by the release hydrant; when the trip hydrant is unloaded from between the notches of the relief slot, the design check weight can fall through the relief slot onto the signal detection system.
Furthermore, the signal detection system comprises a buffer device, a force sensor, a displacement sensor and an acceleration sensor; the force sensor and the acceleration sensor are arranged at the pile head of the pile foundation to be detected, and the displacement sensor is arranged at the pile side of the pile foundation to be detected; the buffer device is sleeved on the periphery of the guide rod, is positioned below the bearing platform and is arranged at a position close to the lower end of the guide rod so as to be capable of stretching along the guide rod, and the lower end of the guide rod can be always attached to the pile head of the pile foundation to be detected through the force sensor and the acceleration sensor;
when the designed detection counterweight falls to the buffer device, the signal detection system starts to collect corresponding stress, displacement and acceleration signals, when the designed detection counterweight rebounds to be separated from the buffer device, data collection of the signal detection system is finished, and a force time course curve, a displacement time course curve and an acceleration time course curve are formed by corresponding force, displacement and acceleration signals of the signal detection system in a time period t; the time period t refers to the time interval between the moment when the designed detection counterweight falls to the buffer device and the moment when the designed detection counterweight rebounds to separate from the buffer device.
Further, the lifting device comprises an electric hoist or a winch, a steel strand/hinge and a stiff steel frame;
the fixed part of the electric hoist or the winch is arranged on the equipment support, the actuating part of the electric hoist or the winch is connected with the stiff steel frame through a steel strand/hinge, the other end of the stiff steel frame is fixed with the release rocking handle, and the stiff steel frame is fixed with the bearing platform;
when the electric hoist or the winch works, the stiff steel frame can be lifted through the steel strand/hinge, and the bearing platform is driven to be lifted to the designed height along the guide rod; when the release pin bolt of the loading platform is unloaded, the design detection counter weight falls onto the signal detection system through the release groove, and the release rocking handle (11) rocks through the steel strand/hinge (3), thereby completing the release.
Further, the design detection counter weight is a split mounting type device, the height-diameter ratio of the load formed by split mounting is larger than 2, and the design detection counter weight mandrel is consistent with the guide rod-shaped mandrel.
Further, the equipment support adopts a truss/steel frame in a standard section.
Furthermore, the equipment support comprises two supporting upright posts and a cross frame connected between the top ends of the two supporting upright posts; the upper end of the guide rod and the fixed part of the lifting device are respectively fixed with the cross frame.
Another technical object of the present invention is to provide a method for detecting a pile foundation based on the split type fast loading method, which comprises the following steps:
(1) preparation work
1.1, constructing, designing and detecting a balance weight: obtaining a detection design counter weight based on the design bearing capacity of the foundation pile to be detected, carrying out load assembly, and ensuring that the height-diameter ratio of the detection design counter weight is more than 2 and the appearance is regular, wherein the detection design counter weight mandrel is consistent with the guide rod-shaped mandrel;
1.2 set up equipment support
1.3, install guide bar, electric block, steel strand wires/hinge, strength nature steelframe, detection design counter weight, signal detection system according to the design to the equipment forms whole pile foundation detection device, specifically includes:
installing a signal detection system on the foundation pile to be detected;
directly placing the lower end of the guide rod on a signal detection system, then sequentially sleeving a buffer device, a bearing platform and a detection design counterweight on the guide rod from the upper end of the guide rod, and fixing the upper end of the guide rod on an equipment support;
mounting a lifting device on the equipment support, and connecting the lifting device with a stiff steel frame fixed on the bearing platform through a steel strand/hinge;
a release rocking handle is arranged on the lower side of the stiff steel frame;
(2) detection of
2.1, starting a lifting device, lifting the stiff steel frame through a steel strand/hinge, driving the bearing platform to be lifted to a designed height along the guide rod, and completing lifting work;
2.2, unloading a release pin bolt arranged on the bearing platform, so that the detection design counter weight can fall to a signal detection system through a release groove of the bearing platform;
2.3, starting recording when the detection design counterweight contacts the buffer device, and finishing recording after rebounding from the buffer device;
analyzing the recorded result to judge whether the detection of the pile foundation to be detected continues; and (4) analyzing the unqualified result, lifting the releasing device and the detection design counter weight to the design detection height again along the guide rod by using the lifting device, and performing hammering detection again until the detection signal is qualified and then stopping hammering.
Based on the technical scheme, compared with the prior art, the invention has the following advantages:
(1) the split type fast loading method pile foundation detection device can effectively detect the bearing capacity and integrity of the pile foundation in a narrow field.
(2) Compared with the traditional pile loading method, the split type fast loading method pile foundation detection device has the advantages of small occupied area and simplicity in installation; compared with a high-strain pile foundation detection method, the quick-loading method is more accurate in detection result, and the accuracy can be improved by 10% -15%.
(3) The split type fast loading method pile foundation detection device is convenient to disassemble and assemble, and is very practical for foundation piles with smaller bearing capacity.
Drawings
FIG. 1 shows the structural style of the split type fast loading method pile foundation detection device;
fig. 2 shows a design of the release device.
Fig. 3 shows a structural schematic diagram of the carrying platform.
In the figure: 1-equipping a support; 2-a lifting device; 3-lifting the steel strand/hinge; 4-a guide rod; 5-a release device; 6-detecting a design counterweight; 7-a buffer device; 8-a signal detection system; 9-stiff steel frame; 10-a load-bearing platform; 11-release the rocking handle; 12-releasing the thrombus removal.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. The relative arrangement of the components and steps, expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may also be oriented in other different ways (rotated 90 degrees or at other orientations).
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. In addition, for the purpose of convenience of description, the vertical direction, the transverse direction and the longitudinal direction are perpendicular to each other, and the two directions in the vertical direction are up and down directions respectively.
The invention discloses fast loading method pile foundation detection equipment, which comprises a lattice steel frame (truss), a guide device, a lifting-releasing device, a signal detection system (force, displacement, acceleration and the like) and other equipment. The guide device is composed of a guide rod and the like; the lifting-releasing device is composed of a bearing platform, a stiffening steel frame, a lifting device and the like; the signal detection system comprises a force sensing system, an acceleration sensing system, a displacement sensing system and the like.
The invention provides a novel detection mode of pile foundation bearing capacity and pile foundation integrity, which aims at the respective defects of the existing pile foundation detection technology. The fast-loading method pile foundation detection technology is essentially a power pile foundation detection technology, and is different from the traditional power detection technology in that the power is utilized to simulate the P-y curve of static-loading pile foundation detection so as to analyze the bearing capacity of the pile foundation. The fast-loading method pile foundation detection technology also has dynamic characteristics, so that the method can be used for detecting the integrity of the pile foundation.
The quick-loading method pile foundation detection equipment utilizes the guide device to lift the detection load to the set height, the release device is utilized to release the load at the set height when the detection is started, the load loads the pile foundation end through the guide rod in the guide device, after the loading is completed, the mechanical/electronic locking device in the guide device locks the load, if the load mass is large, the buffer device can be used for weakening the resilience of the load, the signal detection system records signals of force, acceleration, displacement and the like in the process, and the recorded data is utilized to analyze the pile foundation so as to obtain the detection result of the bearing capacity and the integrity of the pile foundation.
When the fast loading method is used for detecting the pile foundation, the split type fast loading method pile foundation detection device enters the field in a small unit form, assembling in the field, leveling the equipment after the guide device is assembled, balancing weight assembling according to the designed bearing capacity of the pile foundation after leveling, verifying the integrity of the balance weight after the assembling is completed, the releasing device and the counterweight are arranged in the guiding device, the counterweight is lifted to the designed detection height by the guiding device, then leveling the device again to ensure that the counterweight is centered in the guide device, starting to install a signal detection system, releasing the counterweight to acquire signals after debugging is finished, and judging whether pile foundation detection continues according to the acquisition result, if the field analysis result is unqualified, lifting the releasing device and the balance weight to the designed detection height again by using the guide device, and performing hammering detection again until the detection signal is qualified and stopping hammering. And importing the detection data by using signal analysis software to obtain the integrity and the bearing capacity of the pile foundation.
The structure style of the split type fast loading method pile foundation detection device is shown in the attached figure 1. The split type fast loading method pile foundation detection device mainly comprises an equipment support/cross frame, a guide device, a lifting-releasing device, a signal detection system, a load and the like. Wherein the guide device comprises a guide rod 4, a buffer device 7 and the like; the lifting-releasing device comprises a lifting device 2, a lifting steel strand/hinge 3, a releasing device 5 and the like; a signal detection system 8 and a detection design weight 6.
Figure 2 shows a design of the release device. The releasing device 5 is an integrated device and is used for lifting and releasing a load, and mainly comprises a stiff steel frame 9, a bearing platform 10 and a releasing rocking handle 11, wherein a releasing pin 12 is arranged in the bearing platform 10 in the releasing platform.
The device is an assembled device regardless of a guide device, a lifting-releasing device and a load-carrying device, the guide device comprises an equipment support/cross frame 1, the support adopts a truss/steel frame in a standard section, the lifting height of the load-carrying device required by different foundation pile bearing capacity is designed, and the standard section is used for lapping; the guide rod 4 adopts an assembled steel pipe to enable the guide rod, the support/cross frame and the signal detection system to be tightly attached, so that the guide rod forms a shape shown in the attached drawing; the buffer device 7 mainly uses the elastic property of the material to bear the impact load caused by the load so as to ensure that the detection system can work normally.
The lifting-releasing device comprises a lifting device 2, the load-bearing platform is lifted to a designed position by mainly utilizing the lifting device, and the common lifting device comprises a winch or an electric hoist and the like; the lifting wire/hinge 3 is mainly used for the lifting device lifting equipment and may provide a spindle-like action when the release device is activated. The load is placed on a bearing platform 10 of the releasing device 5, when the balance weight 6 is designed for lifting detection, the lifting device 2 lifts the stiff steel frame 9 through the steel strand/hinge 3, and the bearing platform 10 is lifted to the designed height along the guide rod 4, and then lifting is completed; when the test design weight 6 is released, the release latch 12 of the load-bearing platform 10 is released and the release rocker 11 rocks via the steel strand/hinge 3, thereby completing the release.
The detection design counter weight 6 is also a split mounting type device, and is obtained based on foundation pile design bearing capacity, and then is spliced by utilizing the existing load, and the spliced load is tested, so that the load height-diameter ratio is more than 2, the appearance is regular, and the load-bearing mandrel is consistent with the guide rod-shaped mandrel.
The signal detection system 8 finishes debugging when detecting the lifting of the design counter weight 6, starts working after the lifting-releasing device 5 finishes releasing, starts recording when detecting the contact of the design counter weight 6 with the buffer device 7, and finishes recording after rebounding. And judging whether pile foundation detection continues according to the acquisition result, if the field analysis result is unqualified, lifting the releasing device and the balance weight to the designed detection height again by using the guide rod, and performing hammering detection again until the detection signal is qualified and stopping hammering. And importing the detection data by using signal analysis software to obtain the integrity and the bearing capacity of the pile foundation. Specifically, the signal detection system comprises a buffer device, a force sensor, a displacement sensor and an acceleration sensor; the force sensor and the acceleration sensor are arranged at the pile head of the pile foundation to be detected, and the displacement sensor is arranged at the pile side of the pile foundation to be detected; the buffer device is sleeved on the periphery of the guide rod, is positioned below the bearing platform and is arranged at a position close to the lower end of the guide rod so as to be capable of stretching along the guide rod, and the lower end of the guide rod can be always attached to the pile head of the pile foundation to be detected through the force sensor and the acceleration sensor; when the designed detection counterweight falls to the buffer device, the signal detection system starts to collect corresponding stress, displacement and acceleration signals, when the designed detection counterweight rebounds to be separated from the buffer device, data collection of the signal detection system is finished, and a force time course curve, a displacement time course curve and an acceleration time course curve are formed by corresponding force, displacement and acceleration signals of the signal detection system in a time period t; the time period t refers to the time interval between the moment when the designed detection counterweight falls to the buffer device and the moment when the designed detection counterweight rebounds to separate from the buffer device.
Based on the split type fast loading method pile foundation detection device, the invention provides a detection method, which comprises the following steps:
(1) preparation work
1.1, constructing a load: obtaining a detection design counter weight based on the design bearing capacity of the foundation pile to be detected, and then splicing by using the existing load, so as to ensure that the height-diameter ratio of the detection design counter weight is more than 2, and the appearance is regular, and the detection design counter weight mandrel is consistent with the guide rod-shaped mandrel;
1.2 set up equipment support
1.3, install guide bar, hoisting device, steel strand wires/hinge, strength nature steelframe, load, signal detection system according to the design to the equipment forms whole pile foundation detection device, specifically includes:
installing a signal detection system above the foundation pile to be detected;
directly placing the lower end of the guide rod on a signal detection system, then sequentially sleeving a buffer device, a bearing platform and a detection design counterweight on the guide rod from the upper end of the guide rod, and fixing the upper end of the guide rod on an equipment support;
mounting a fixed part of the lifting device on the equipment support, and connecting an actuating part of the lifting device with a stiff steel frame fixed on the bearing platform through a steel strand/hinge;
a release rocking handle is arranged on the lower side of the stiff steel frame;
(2) detection of
2.1, starting a lifting device, lifting the stiff steel frame through a steel strand/hinge, driving the bearing platform to be lifted to a designed height along the guide rod, and completing lifting work;
2.2, unloading a release pin bolt arranged on the bearing platform, so that the detection design counter weight can fall to a signal detection system through a release groove of the bearing platform;
2.3, starting recording when the detection design counterweight contacts the buffer device, and finishing recording after rebounding from the buffer device;
(3) analyzing the recorded result to judge whether the detection of the pile foundation to be detected continues; and (4) analyzing the unqualified result, lifting the releasing device and the detection design counter weight to the design detection height again along the guide rod by using the lifting device, and performing hammering detection again until the detection signal is qualified and then stopping hammering.
Claims (7)
1. A split type fast loading method pile foundation detection device is characterized by comprising an equipment support, a guide device, a lifting-releasing device, a designed detection counterweight and a signal detection system; wherein:
the signal detection system is arranged above the pile foundation to be detected;
the guide device comprises a guide rod; the upper end of the guide rod is fixed with the equipment support, and the lower end of the guide rod is suspended above the signal detection system and can be attached to the signal detection system;
the lifting-releasing device comprises a lifting device and a releasing device;
the lifting device is arranged on the equipment bracket and is connected with the lifting-releasing device through a hinge; the releasing device can move along the actuating direction of the lifting device under the power drive of the lifting device, and the actuating direction of the lifting device is parallel to the extending direction of the guide rod;
the release device comprises a bearing platform, a release pin bolt and a release groove which is formed along the radial direction of the bearing platform; the bottom of the release groove is positioned at the central part of the bearing platform, and the notch of the release groove is arranged by penetrating through the peripheral circular surface of the bearing platform; the bearing platform is sleeved with the guide rod through the groove bottom of the release groove, the shape of the groove bottom of the release groove is matched with the periphery of the guide rod, and the release pin bolt can be loaded/unloaded between the groove openings of the release groove;
the design detection counterweight is sleeved on the periphery of the guide rod and arranged opposite to the release groove; when the release hydrant is loaded between the notches of the release slot, the detection counterweight is designed to be supported by the release hydrant; when the trip hydrant is unloaded from between the notches of the relief slot, the design check weight can fall through the relief slot onto the signal detection system.
2. The split type fast loading method pile foundation detection device according to claim 1, wherein the signal detection system comprises a buffer device, a force sensor, a displacement sensor and an acceleration sensor; the force sensor and the acceleration sensor are arranged at the pile head of the pile foundation to be detected, and the displacement sensor is arranged at the pile side of the pile foundation to be detected; the buffer device is sleeved on the periphery of the guide rod, is positioned below the bearing platform and is arranged at a position close to the lower end of the guide rod so as to be capable of stretching along the guide rod, and the lower end of the guide rod can be always attached to the pile head of the pile foundation to be detected through the force sensor and the acceleration sensor;
when the designed detection counterweight falls to the buffer device, the signal detection system starts to collect corresponding stress, displacement and acceleration signals, when the designed detection counterweight rebounds to be separated from the buffer device, data collection of the signal detection system is finished, and a force time course curve, a displacement time course curve and an acceleration time course curve are formed by corresponding force, displacement and acceleration signals of the signal detection system in a time period t; the time period t refers to the time interval between the moment when the designed detection counterweight falls to the buffer device and the moment when the designed detection counterweight rebounds to separate from the buffer device.
3. The split type fast loading method pile foundation detection device of claim 2, wherein the lifting device comprises an electric hoist or a winch, a steel strand/hinge, a stiff steel frame;
the fixed part of the electric hoist or the winch is arranged on the equipment support, the actuating part of the electric hoist or the winch is connected with the stiff steel frame through a steel strand/hinge, the other end of the stiff steel frame is fixed with the release rocking handle, and the stiff steel frame is fixed with the bearing platform;
when the electric hoist or the winch works, the stiff steel frame can be lifted through the steel strand/hinge, and the bearing platform is driven to be lifted to the designed height along the guide rod; when the release pin bolt of the loading platform is unloaded, the design detection counter weight falls onto the signal detection system through the release groove, and the release rocking handle (11) rocks through the steel strand/hinge (3), thereby completing the release.
4. The split type rapid-loading method pile foundation detection device according to claim 3, wherein the design detection counter weight is an assembled device, the height-diameter ratio of the assembled load is greater than 2, and the design detection counter weight mandrel is consistent with the guide rod-shaped mandrel.
5. The split type fast loading method pile foundation detection device of claim 4, wherein the equipment support is a truss/steel frame in a standard section.
6. The split type fast loading method pile foundation detection device of claim 5, wherein the equipment support comprises two support columns and a cross frame connected between the top ends of the two support columns; the upper end of the guide rod and the fixed part of the lifting device are respectively fixed with the cross frame.
7. A method for detecting a pile foundation by a split type fast loading method based on the claim 1 is characterized by comprising the following steps:
preparation work
1.1, constructing, designing and detecting a balance weight: obtaining a detection design counter weight based on the design bearing capacity of the foundation pile to be detected, carrying out load assembly, and ensuring that the height-diameter ratio of the detection design counter weight is more than 2 and the appearance is regular, wherein the detection design counter weight mandrel is consistent with the guide rod-shaped mandrel;
1.2 set up equipment support
1.3, install guide bar, electric block, steel strand wires/hinge, strength nature steelframe, detection design counter weight, signal detection system according to the design to the equipment forms whole pile foundation detection device, specifically includes:
installing a signal detection system on the foundation pile to be detected;
directly placing the lower end of the guide rod on a signal detection system, then sequentially sleeving a buffer device, a bearing platform and a detection design counterweight on the guide rod from the upper end of the guide rod, and fixing the upper end of the guide rod on an equipment support;
mounting a lifting device on the equipment support, and connecting the lifting device with a stiff steel frame fixed on the bearing platform through a steel strand/hinge;
a release rocking handle is arranged on the lower side of the stiff steel frame;
detection of
2.1, starting a lifting device, lifting the stiff steel frame through a steel strand/hinge, driving the bearing platform to be lifted to a designed height along the guide rod, and completing lifting work;
2.2, unloading a release pin bolt arranged on the bearing platform, so that the detection design counter weight can fall to a signal detection system through a release groove of the bearing platform;
2.3, starting recording when the detection design counterweight contacts the buffer device, and finishing recording after rebounding from the buffer device;
analyzing the recorded result to judge whether the detection of the pile foundation to be detected continues; and (4) analyzing the unqualified result, lifting the releasing device and the detection design counter weight to the design detection height again along the guide rod by using the lifting device, and performing hammering detection again until the detection signal is qualified and then stopping hammering.
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| CN117309362A (en) * | 2023-11-28 | 2023-12-29 | 瑞特认证检测集团有限公司 | Integrated quick-loading pile foundation detection device and detection method thereof |
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| CN106872289A (en) * | 2017-01-24 | 2017-06-20 | 重庆大学 | A kind of sand body impact experiment device and its test method |
| CN208432457U (en) * | 2018-07-09 | 2019-01-25 | 内蒙古自治区交通建设工程质量监督局 | A kind of indoor simulation device with low-strain dynamic measure method test pile stiffness value |
| CN111289350A (en) * | 2020-03-16 | 2020-06-16 | 东南大学 | Shallow foundation bearing capacity testing device in deepwater environment and implementation method |
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| CN117309362A (en) * | 2023-11-28 | 2023-12-29 | 瑞特认证检测集团有限公司 | Integrated quick-loading pile foundation detection device and detection method thereof |
| CN117309362B (en) * | 2023-11-28 | 2024-01-26 | 瑞特认证检测集团有限公司 | Integrated quick-loading pile foundation detection device and detection method thereof |
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