CN114577644B - Auxiliary device and method for ensuring model pile injection verticality and angle - Google Patents

Auxiliary device and method for ensuring model pile injection verticality and angle Download PDF

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Publication number
CN114577644B
CN114577644B CN202210478191.7A CN202210478191A CN114577644B CN 114577644 B CN114577644 B CN 114577644B CN 202210478191 A CN202210478191 A CN 202210478191A CN 114577644 B CN114577644 B CN 114577644B
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pile
model
axis
angle
guide
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CN114577644A (en
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安晓宇
纪文栋
张宇亭
刘晓强
裴文斌
赵跃
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Tianjin Research Institute for Water Transport Engineering MOT
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Tianjin Research Institute for Water Transport Engineering MOT
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/32Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
    • G01N3/34Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by mechanical means, e.g. hammer blows
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/02Details
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0001Type of application of the stress
    • G01N2203/0005Repeated or cyclic

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
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  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)

Abstract

The invention relates to an auxiliary device and an injection method for ensuring the injection verticality and angle of a model pile, belonging to the technical field of building pile foundation engineering.A model pile can be injected on soil surfaces at different positions and different heights in a model box by adjusting a plane track and a vertical track; simulating an actual piling process by using the hammering module and the static pressure module; the hammering module realizes the driving of the model pile through the reciprocating free falling motion of the heavy hammer, the driving method is consistent with the actual oil hammer pile driver, and in addition, the simulation of different hammering energies can be realized by changing the weight of the heavy hammer; the static pressure module is similar to a circular reciprocating motion mode, and is more similar to the static pressure process of an actual pile foundation; the alignment of the model pile and the loading equipment can be realized through the two sight lines on the pile clamping cover, so that the reliable guarantee is provided for the research on the bearing capacity problem of the pile driving construction process and the pile foundation thereof, and the accuracy and reliability of test data are ensured.

Description

Auxiliary device and method for ensuring model pile injection verticality and angle
Technical Field
The invention relates to the technical field of building pile foundation engineering, in particular to an auxiliary device and an auxiliary method for ensuring the penetration verticality and angle of a model pile.
Background
The pile is an effective means for improving the bearing capacity of the foundation. The types of piles are various, and the precast pile has the characteristics of high construction speed, large bearing load, firmness, durability and the like, and is widely applied to construction of various large foundation projects. However, such piles may have a negative effect on the surrounding soil or structure during construction, since the precast piles are typically driven, pressed or vibrated into the soil using pile sinking equipment.
In scientific research in the field of geotechnical engineering, the bearing characteristics of pile foundations are one of the issues of particular concern to engineers. Research means comprise theoretical analysis, numerical simulation and the like, and both of the theoretical analysis and the numerical simulation need accurate test data to carry out parameter verification and comparative analysis, so that how to accurately carry out the test is the key of the research on the scientific problems.
The bearing characteristics of the pile foundation comprise horizontal bearing capacity research and vertical bearing capacity research, the two types of research need to vertically insert the model pile into the model foundation, and when the horizontal bearing capacity research is carried out, the strain gauge adhered to the model pile needs to be over against loading equipment, otherwise, inaccurate measurement can be caused. In addition, the static pressure or hammering soil-entering process of the model pile has little influence on the bearing capacity. Therefore, in the field of pile foundation bearing capacity characteristic model tests, an auxiliary device and a using method which can simulate a pile sinking process and can ensure the penetration perpendicularity and angle of a model pile are needed.
As the Chinese invention patent: a pile-forming loading model test device and method for a stiff composite pile are disclosed, and the application number is as follows: CN202010255843.1, which comprises a model box, a reaction column, a core pile injection device and a core pile positioner, wherein the core pile is vertically and stably injected into a cement-soil pile which is not initially solidified through the core pile injection device, the core pile is ensured not to deviate in the vertical direction under the cooperation of the core pile positioner, and a vertical load is applied to a stiff composite pile after cement-soil around the core pile is finally solidified through a vertical loading device; according to the invention, the mould core pile is continuously injected into the cement soil model pile which is not initially set, the injection rate of the mould core pile is controllable, and the verticality of the pile body in the injection process can be ensured; after the stiff composite model pile is formed into a pile, the vertical loading of the pile body can be realized, and the vertical bearing mechanism of the pile body is researched.
As in the chinese patent application: the utility model provides a stake straightness control injection device that hangs down for pile foundation centrifugal test, application number CN202110138614.6, the device includes model pile, loading injection system, straightness control system and centrifuge model case that hangs down. The perpendicularity control system comprises a fixed upper plate and a fixed lower plate which are arranged in parallel, the fixed upper plate and the fixed lower plate are both circular plates, and the model pile is positioned at the circle center of each circular plate; the fixed upper plate is provided with 4 guide grooves along the radial direction, and the fixed lower plate is also provided with the same guide grooves at the positions corresponding to the fixed upper plate for providing constraint for the guide plates; the upper end and the lower end of the guide plate are both positioned in the guide groove and can move in the guide groove along the radial direction, so that the installation requirements of different pile diameters are met. The device can be used for injecting the pile foundation into a seabed soil body, can be suitable for pile pressing penetration with different pile diameters by changing the distance between the guide plates, and can ensure the verticality of the pressed pile in the injection process so as to meet the test requirement of the later period.
Disclosure of Invention
In view of this, the present invention provides an auxiliary device and a method for ensuring the perpendicularity and angle of penetration of a model pile, so as to overcome the shortcomings of the prior art and solve the technical problem that the hammering or static pressure condition cannot be simulated.
In order to achieve the purpose, one technical scheme provided by the invention is as follows: the utility model provides an guarantee model stake penetration straightness auxiliary device who hangs down and angle, including:
the upper end of the model box is provided with an opening, and a sand layer is filled in the model box;
the model box is provided with at least two groups of X axial driving track systems, and each two groups of X axial driving track systems are oppositely arranged at the opening of the model box and are used for driving the auxiliary device to move along the X axial direction of the model box;
at least one group of Y-axis driving track systems are arranged between every two groups of X-axis driving track systems and are used for driving the auxiliary device to move along the Y-axis direction of the model box;
the Y-axis driving track system is provided with at least one group of Z-axis driving track systems for driving the auxiliary device to move along the Z-axis direction of the model box;
and the Z-axis driving track system is provided with a pile clamping mechanism for clamping the model pile on the pile clamping mechanism and simulating the pile sinking process of the pile under the actual construction transition state penetrating into the sand layer.
The pile clamping mechanism is provided with a detachable hammering auxiliary simulation module and/or static pressure auxiliary simulation module which are used for increasing the simulation condition of hammering and/or static pressure in the pile sinking simulation process;
and an angle adjusting mechanism is arranged at the joint of the Y-axis driving track system and the Z-axis driving track system.
Furthermore, the X-axis driving track system, the Y-axis driving track system and the Z-axis driving track system have the same structure, the X-axis driving track system is composed of an X-axis track and an X-axis slider arranged on the X-axis track, the Y-axis driving track system is composed of a Y-axis track and a Y-axis slider arranged on the Y-axis track, and the Z-axis driving track system is composed of a Z-axis track and a Z-axis slider arranged on the Z-axis track.
Furthermore, the pile clamping mechanism comprises a pile clamping base and a pile clamping cover which are fixedly arranged on a Z-axis sliding block of the Z-axis driving track system;
the pile clamping base and the pile clamping cover are screwed through the bolts by hands, and the model pile is clamped between the pile clamping base and the pile clamping cover.
Furthermore, a strip-shaped window is formed in the middle of the pile clamping cover, aiming lines are arranged in the window at the front and the back, when the center line of the strain gauge on the model pile and the two aiming lines form three lines which are in the same plane, the model pile is in a vertical state without deflection, and the strain gauge on the model pile is over against the loading equipment.
Further, the hammer assist simulation module includes:
a hammering installation base is installed on the pile clamping base;
the rail cabinet is arranged on the hammering mounting base and is perpendicular to the hammering mounting base;
each groove is arranged on the surface of the inner wall of the track cabinet, and each group of grooves are arranged oppositely;
the driving piece is arranged at the upper end of the track cabinet, and the output end of the driving piece can penetrate through a plate body at the upper end of the track cabinet;
the heavy hammer is connected with the output end of the driving piece;
the guide bulges are positioned on two sides of the heavy hammer and embedded into the grooves.
Furthermore, when the driving member is a rotary output driving member, a guiding mechanism can be arranged between the output end of the driving member and the heavy hammer.
Further, the guide mechanism includes:
the spiral guide post is positioned between the output end of the driving piece and the heavy hammer;
the guide groove is formed in the outer surface of the spiral guide column;
the mounting hole is formed in the surface of the heavy hammer;
the guide block is positioned on the surface of the inner wall of the mounting hole and embedded into the guide groove, so that the guide block can move along the track of the guide groove;
further, the static pressure auxiliary simulation module comprises:
the U-shaped groove is a groove body with a continuous rack;
the static pressure mounting base is mounted on the pile clamping base;
the mounting plates are arranged on the static pressure mounting base in parallel;
the double-output rotary driving part is arranged between the mounting plates, and the output ends of the double-output rotary driving part penetrate through the corresponding mounting plates;
the center of each eccentric wheel is arranged on the output end of the corresponding double-output rotary driving part;
each eccentric guide post is arranged on the corresponding mounting plate;
one end of each eccentric rod is hinged to the corresponding eccentric wheel, and the eccentric guide bulge on the other end of each eccentric rod is positioned in the continuous rack of the U-shaped groove;
the eccentric rod long hole is formed in the eccentric rod;
the eccentric guide post is positioned in the eccentric rod long hole.
Further, the angle adjusting mechanism includes:
the angle adjusting and mounting base is fixedly mounted on the Y-axis sliding block;
the angle adjusting long hole is positioned on the U-shaped groove;
one end of the connecting rod is hinged on the angle adjusting installation base, and the other end of the connecting rod is connected in the angle adjusting long hole in a sliding manner;
one end of the angle adjusting installation base is hinged with the angle adjusting long hole, so that the angle adjusting installation base, the angle adjusting long hole and the connecting rod form a triangular shape for realizing angle adjustment and stabilizing the supporting device.
The invention provides another technical scheme which is as follows: a method for inserting a model pile by using the auxiliary device for inserting a model pile, the method comprising:
s1, filling a sand layer in the model box;
s2, clamping the model pile on the device through a pile clamping mechanism;
s3, selecting a designated position and height by adjusting the X-axis driving track system, the Y-axis driving track system and the Z-axis driving track system;
s4, the model piles in the S3 are injected into the model box in the S1, and experiments of soil surfaces at different positions and different heights are achieved;
s5, adjusting the angle of the device through an angle adjusting mechanism, and adjusting the penetration angle of the model pile;
s6, optionally installing a hammering auxiliary simulation module or a static pressure auxiliary simulation module on the pile clamping mechanism;
s7, if a hammering auxiliary simulation module is selected to be installed, driving of a model pile is achieved through reciprocating free-fall motion of a heavy hammer, the actual piling process of the oil hammer pile driver is simulated, and simulation of different hammering energies is achieved by changing the weight of the heavy hammer;
s8, if a static pressure auxiliary simulation module is selected to be installed, the model pile simulates the static pressure process of the actual pile foundation through a circular reciprocating motion mode;
and S9, collecting data feedback of the strain gauge on the model pile, and providing data for researching the pile driving construction process and the bearing capacity problem of the pile foundation.
The beneficial effects of the invention are:
through the adjustment of the plane track and the vertical track, the model piles can be inserted into the soil surfaces at different positions and different heights in the model box; simulating an actual piling process by using the hammering module and the static pressure module; the hammering module realizes the driving of the model pile through the circular reciprocating free falling motion of the heavy hammer in slow spiral ascending and fast vertical descending, the driving method is also consistent with the actual oil hammer pile driver, and in addition, the simulation of different hammering energy can be realized by changing the weight of the heavy hammer; the static pressure module is in a motion mode of speed alternation similar to 'earthworm wriggling', and is more similar to the static pressure process of an actual pile foundation; the alignment of the model pile and the loading equipment can be realized through the two sight lines on the pile clamping cover, so that the reliable guarantee is provided for the research of the bearing capacity problem of the pile driving construction process and the pile foundation thereof, and the accuracy and reliability of test data are ensured. The invention can improve the test working efficiency, and has simple structure, reliable performance and simple and convenient manufacture.
Drawings
FIG. 1 is a schematic structural view of example 1;
fig. 2 is a schematic structural view of a hammer assist simulation module in embodiment 1;
FIG. 3 is a schematic view of a part of the guide mechanism and its weight in embodiment 1;
FIG. 4 is a schematic structural view of a cross-hair in embodiment 1;
FIG. 5 is a schematic configuration diagram of a static pressure assisting simulation module in embodiment 2;
FIG. 6 is a schematic configuration diagram of a partial static pressure assist simulation module in embodiment 2;
FIG. 7 is a schematic structural view of an angle adjusting mechanism in embodiment 3;
fig. 8 is a schematic view of a state where the guide block in embodiment 1 is moved to the intersection of the guide grooves;
fig. 9 is a schematic diagram of the motion state of the static pressure auxiliary simulation module in embodiment 2.
Wherein:
1. a model box;
2. an X-axis drive rail system; 201. an X-axis orbit; 202. an X-axis slider;
3. a Y-axis drive rail system; 301. a Y-axis track; 302. a Y-axis slide block;
4. a Z-axis drive rail system; 401. a Z-axis track; 402. a Z-axis slide block;
5. a pile clamping mechanism; 501. a pile clamping base; 502. clamping a pile cover;
6. model piles;
7. a hammering auxiliary simulation module; 701. hammering the installation base; 702. a track cabinet; 703. a groove; 704. a drive member; 705. a weight; 706. a guide projection; 707. a guide mechanism; 7071. a spiral guide post; 7072. a guide groove; 7073. mounting holes; 7074. a guide block; 7075. mounting a column;
8. a static pressure auxiliary simulation module; 801. a static pressure mounting base; 802. mounting a plate; 803. a dual output rotary drive; 804. an eccentric wheel; 805. an eccentric guide post; 806. an eccentric rod; 8061. an eccentric guide projection; 807. a U-shaped groove; 8071. a continuous rack; 808. an eccentric rod slot hole;
9. a line of sight;
10. an angle adjusting mechanism; 1001. an angle adjustment mounting base; 1002. the angle adjusting long hole; 1003. a connecting rod.
Detailed Description
The present invention is described in further detail below with reference to fig. 1-7.
Example 1
As shown in fig. 1-4, an auxiliary device for ensuring the perpendicularity and angle of penetration of a model pile comprises:
as shown in fig. 1, the upper end of a model box 1 is open, and a sand layer is filled in the model box 1; before the experiment, the model box 1 is filled with a sand layer, the sand layer can be replaced or configured according to the actual soil layer requirement to be simulated, the simulation process is ensured to be closer to the actual condition, and the simulation precision is improved.
The model box 1 is provided with at least two groups of X axial driving track systems 2, and each two groups of X axial driving track systems 2 are oppositely arranged at the opening of the model box 1 and used for driving the auxiliary device to move along the X axial direction of the model box 1;
at least one group of Y-axis driving track systems 3 are arranged between every two groups of X-axis driving track systems 2 and used for driving the auxiliary device to move along the Y-axis direction of the model box 1;
at least one group of Z-axis driving track systems 4 are arranged on the Y-axis driving track system 3 and used for driving the auxiliary device to move along the Z-axis direction of the model box 1;
specifically, the X-axis drive rail system 2, the Y-axis drive rail system 3, and the Z-axis drive rail system 4 have the same structure, the X-axis drive rail system 2 is composed of an X-axis rail 201 and an X-axis slider 202 mounted on the X-axis rail 201, the Y-axis drive rail system 3 is composed of a Y-axis rail 301 and a Y-axis slider 302 mounted on the Y-axis rail 301, and the Z-axis drive rail system 4 is composed of a Z-axis rail 401 and a Z-axis slider 402 mounted on the Z-axis rail 401.
When the auxiliary device needs to be moved to a specified position, the movement positioning can be realized through the X-axis driving track system 2, the Y-axis driving track system 3 and the Z-axis driving track system 4.
Meanwhile, driving parts can be arranged in the X-axis sliding block 202, the Y-axis sliding block 302 and the Z-axis sliding block 402, so that the X-axis sliding block 202 can automatically move along the X-axis track 201, the Y-axis sliding block 302 can automatically move along the Y-axis track 301, and the Z-axis sliding block 402 can automatically move along the Z-axis track 401.
Positioning sensors are also arranged in the X-axis sliding block 202, the Y-axis sliding block 302 and the Z-axis sliding block 402, so that positioning data can be fed back in real time, and subsequent analog data acquisition and analysis are facilitated.
Movement of the X-axis slide 202 along the X-axis track 201, movement of the Y-axis slide 302 along the Y-axis track 301, or movement of the Z-axis slide 402 along the Z-axis track 401 does not preclude manual adjustment.
As shown in fig. 1, a pile clamping mechanism 5 is arranged on the Z-axis driving track system 4, and is used for clamping and loading a model pile 6 on the pile clamping mechanism 5 to simulate a pile sinking process in which a pile is penetrated into a sand layer in a practical construction transition state.
The pile clamping mechanism 5 is provided with a detachable hammering auxiliary simulation module 7 which is used for increasing hammering simulation conditions in the simulation pile sinking process;
further, the pile clamping mechanism 5 comprises a pile clamping base 501 and a pile clamping cover 502 which are fixedly arranged on the Z-axis slide block 402 of the Z-axis driving track system 4;
specifically, the pile clamping base 501 and the pile clamping cover 502 are screwed by hand to clamp the model pile 6 between the pile clamping base 501 and the pile clamping cover 502. If the model pile 6 needs to be replaced, the bolt can be screwed by unscrewing the hand, and the replacement work is completed.
Further, as shown in fig. 4, a strip-shaped window is opened in the middle of the pile clamping cover 502, the front and the back of the inside of the window are both provided with the aiming lines 9, when the center line of the strain gauge on the model pile 6 and the two aiming lines 9 form three lines in the same plane, the model pile 6 is in a vertical state without deflection, and the strain gauge on the model pile is already over against the loading equipment.
Further, as shown in fig. 3, the hammering assistance simulation module 7 includes:
the hammering installation base 701 is installed on the pile clamping base 501;
specifically, a long hole is formed in the lower portion of the hammering mounting base 701, and is used for fixing the hammering auxiliary simulation module 7 on the pile clamping base 501.
The rail cabinet 702 is installed on the hammering installation base 701, and the rail cabinet 702 is perpendicular to the hammering installation base 701;
the grooves 703 are arranged on the surface of the inner wall of the track cabinet 702, and each group of grooves 703 is arranged oppositely;
the driving piece 704 is installed at the upper end of the track cabinet 702, and the output end of the driving piece 704 can pass through the plate body at the upper end of the track cabinet 702;
a weight 705, the weight 705 is connected to the output end of the driving member 704;
the guide protrusions 706 are located on two sides of the weight 705, and the guide protrusions 706 are embedded in the grooves 703.
In particular, the drive 704 may be a rotary output drive, such as an electric motor, or the like. The drive 704 may also be a linear output drive such as a cylinder, linear motor, etc.
When the driving element 704 is a linear output driving element, the output end of the driving element 704 only needs to be connected with the weight 705, so that the weight 705 can move up and down, a hammering state is simulated, and the guide protrusions 706 on the two sides of the weight 705 can move up and down along the groove 703 to achieve a guiding effect.
When the driving member is a rotary output driving member, a guiding mechanism 707 may be further disposed between the output end of the driving member 704 and the weight 705. Thereby realizing the intermittent hammer 705 hammering state.
Specifically, the guide mechanism 707 includes:
a spiral guide pillar 7071, the spiral guide pillar 7071 is located between the output end of the driving member 704 and the weight 705;
a guide groove 7072, the guide groove 7072 being open on the outer surface of the helical guide column 7071;
specifically, the guide groove 7072 includes a vertical groove and a spiral groove, which are integrally formed, wherein the spiral groove is used for the weight 705 to spirally ascend, and the vertical groove is used for the straight vertical descent.
A mounting hole 7073, wherein the mounting hole 7073 is formed on the surface of the weight 705;
and the guide block 7074 is movably arranged on the inner wall surface of the mounting hole 7073, and the guide block 7074 is embedded in the guide groove 7072, so that the guide block 7074 can move along the track of the guide groove 7072.
Specifically, the mounting post 7075 is arranged on the inner wall surface of the mounting hole 7073, the center of the guide block 7074 is sleeved on the mounting post 7075, and when the guide block moves in the guide groove 7072, the guide block can rotate along with the change of the groove body of the guide groove 7072 and is embedded in the guide groove 7072 all the time.
Specifically, when the driving member is a rotary output driving member, the driving member 704 drives the weight 705 to rotate and rise along the guiding mechanism 707, and vertically fall, thereby simulating the hammering state.
As shown in fig. 8, the shape of the guide block 7074 is similar to an ellipse, when the guide block 7074 moves spirally upward to the intersection of the guide groove 7072, the dimension of the long axis of the guide block 7074 (i.e., the long axis of the ellipse) is larger than the width of the guide groove 7072, the guide block 7074 can only spirally rise along the motion trajectory direction of the spiral groove, so as to ensure that the weight 705 spirally rises to the intersection of the guide groove 7072 without falling, and meanwhile, when the guide block 7074 vertically falls to the intersection of the guide groove 7072, the guide block 7074 can only vertically fall along the motion trajectory direction of the vertical groove due to the shape of the guide block 7074, so as to ensure that the weight 705 vertically falls to the intersection of the guide groove 7072 and smoothly moves downward, and the situation that the weight 705 moves into the spiral groove or is jammed does not occur.
Meanwhile, a threaded hole is formed in the outer side of the heavy hammer 705, a counterweight can be installed, and simulation of different hammering energies is achieved.
Example 2
As shown in fig. 5 to 6, different from embodiment 1, when the static pressure auxiliary simulation module 8 is selected to be installed, the pile clamping mechanism 5 is provided with the static pressure auxiliary simulation module 8 which is detachable and used for increasing the simulation situation of the static pressure state in the pile sinking simulation process.
The static pressure auxiliary simulation module 8 includes:
a U-shaped groove 807, wherein the U-shaped groove 807 is a groove body with a continuous rack 8071;
specifically, each tooth edge of the continuous rack 8071 is circular arc-shaped;
the static pressure mounting base 801 is arranged on the pile clamping base 501;
the lower part of the static pressure mounting base 801 is provided with a long hole which is used for fixing the static pressure auxiliary simulation module 8 on the pile clamping base 501, and the long hole has the significance that when the pile diameter of the model pile changes, the static pressure auxiliary simulation module 8 can still keep the same axis with the pile axis.
Mounting plates 802, at least one group of the mounting plates 802 are arranged on the static pressure mounting base 801 in parallel;
a dual output rotary drive 803, the dual output rotary drive 803 being mounted between a set of mounting plates 802, and the output ends of the dual output rotary drive 803 each passing through a corresponding mounting plate 802;
specifically, the dual-output rotary driving element 803 may be a rotary driving element such as a motor or a motor.
Eccentrics 804, the center of each eccentric 804 being mounted on the output of a corresponding dual output rotary drive 803;
eccentric guide posts 805, each eccentric guide post 805 mounted on a corresponding mounting plate 802;
eccentric rods 806, one end of each eccentric rod 806 is hinged on the corresponding eccentric wheel 804, and an eccentric guide boss 8061 on the other end is positioned in the continuous rack 8071 of the U-shaped groove 807;
the eccentric rod long hole 808, the eccentric rod long hole 808 is arranged on the eccentric rod 806;
the eccentric guide posts 805 are located within the eccentric rod slots 808.
As shown in fig. 7, the specific working principle is as follows: the dual-output rotary driving member 803 drives the eccentric wheel 804 to rotate, and further drives the eccentric rod 806 to rotate, and the eccentric guide protrusion 8061 on the other end of the eccentric rod 806 moves along the continuous rack 8071, so that a static pressure simulation state is realized.
Specifically, as shown in fig. 9, each tooth edge of the continuous rack 8071 is arc-shaped, so that the eccentric guide protrusion 8061 can smoothly move from the inside of the previous tooth to the inside of the next tooth, and meanwhile, the inside of each tooth of the continuous rack 8071 is rectangular, so that the eccentric guide protrusion 8061 is prevented from being separated from the continuous rack 8071, and thus the dual-output rotary driving member 803 has a downward movement tendency, and a static pressure simulation state is realized.
Example 3
As shown in fig. 7, in addition to embodiment 1 or embodiment 2, the present invention further includes an angle adjusting mechanism 10 having a structure including:
an angle adjusting mechanism 10 is arranged at the joint of the Y-axis driving track system 3 and the Z-axis driving track system 4.
An angle adjustment mounting base 1001, the angle adjustment mounting base 1001 being fixedly mounted on the Y-axis slider 302;
the angle adjusting long hole 1002 is positioned on the U-shaped groove 807;
one end of a connecting rod 1003 is hinged on the angle adjusting installation base 1001, and the other end of the connecting rod 1003 is connected in the angle adjusting long hole 1002 in a sliding mode;
one end of the angle adjustment mounting base 1001 is hinged to the angle adjustment long hole 1002, so that the angle adjustment mounting base 1001, the angle adjustment long hole 1002, and the link 1003 constitute a triangular shape that realizes angle adjustment and stable support.
The specific working principle is as follows: when the angle needs to be adjusted, one end of the connecting rod 1003 can slide in the angle adjusting long hole 1002, so that the angle adjustment of the auxiliary device is realized, and the requirement of oblique pile inserting under a certain specific working condition is met.
Example 4
A method for inserting a model pile into a pile by using the auxiliary device for ensuring the perpendicularity and the angle of insertion of the model pile according to any one of embodiments 1 to 3,
s1, filling a sand layer in the model box 1;
s2, clamping the model pile 6 on the device through the pile clamping mechanism 5;
s3, selecting a designated position and height by adjusting the X axial driving track system 2, the Y axial driving track system 3 and the Z axial driving track system 4;
s4, the model pile 6 in the S3 is inserted into the model box 1 in the S1, and experiments of soil surfaces at different positions and different heights are achieved;
s5, adjusting the angle of the device through the angle adjusting mechanism 10, and adjusting the penetration angle of the model pile 6;
s6, optionally installing a hammering auxiliary simulation module 7 or a static pressure auxiliary simulation module 8 on the pile clamping mechanism 5;
s7, if the hammering auxiliary simulation module 7 is selected to be installed, the model pile 6 is driven through the reciprocating free-falling motion of the heavy hammer, the actual piling process of the oil hammer pile driver is simulated, and the simulation of different hammering energies is realized by changing the weight of the heavy hammer;
s8, if the static pressure auxiliary simulation module 8 is selected to be installed, the model pile 6 simulates the static pressure process of the actual pile foundation through a circular reciprocating motion mode;
and S9, acquiring data feedback of the strain gauge on the model pile 6, and providing data for researching the pile driving construction process and the bearing capacity problem of the pile foundation.
Specifically, in a vertical loading test, the perpendicularity of the model pile 6 is ensured; in the horizontal loading test, the perpendicularity of the model pile 6 is ensured, the direction of the strain gauge is also opposite to the telescopic end of the hydraulic cylinder in the horizontal loading test, and the accuracy of the test result can be ensured by the operation method.
While one embodiment of the present invention has been described in detail, the present invention is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.

Claims (10)

1. The utility model provides an guarantee model stake and penetrate straightness and angle's auxiliary device that hangs down which characterized in that, including:
the upper end of the model box (1) is provided with an opening, and a sand layer is filled in the model box;
at least two groups of X axial driving track systems (2) are arranged on the model box (1), and each two groups of X axial driving track systems (2) are oppositely arranged at the opening of the model box (1) and are used for driving the auxiliary device to move along the X axis direction of the model box (1);
at least one group of Y-axis driving track systems (3) is arranged between every two groups of X-axis driving track systems (2) and is used for driving the auxiliary device to move along the Y-axis direction of the model box (1);
at least one group of Z-axis driving track systems (4) are arranged on the Y-axis driving track system (3) and used for driving the auxiliary device to move along the Z-axis direction of the model box (1);
the Z-axis driving track system (4) is provided with a pile clamping mechanism (5) for clamping and loading a model pile (6) on the pile clamping mechanism (5) to simulate the pile sinking process of the pile in the sand layer under the actual construction transition state,
the pile clamping mechanism (5) is provided with a detachable hammering auxiliary simulation module (7) and/or static pressure auxiliary simulation module (8) which are used for increasing the simulation condition of hammering and/or static pressure in the simulation pile sinking process;
an angle adjusting mechanism (10) is arranged at the joint of the Y-axis driving track system (3) and the Z-axis driving track system (4);
the angle adjustment mechanism (10) includes:
the angle adjusting and mounting base (1001), the angle adjusting and mounting base (1001) is fixedly mounted on the Y-axis driving track system (3);
the angle adjusting long hole (1002), the angle adjusting long hole (1002) is positioned on the static pressure auxiliary simulation module (8);
one end of the connecting rod (1003) is hinged to the angle adjusting installation base (1001), and the other end of the connecting rod (1003) is connected into the angle adjusting long hole (1002) in a sliding mode;
one end of the angle adjusting installation base (1001) is hinged with the angle adjusting long hole (1002), so that the angle adjusting installation base (1001), the angle adjusting long hole (1002) and the connecting rod (1003) form a triangular shape for realizing angle adjustment and stabilizing the supporting device.
2. The auxiliary device for ensuring the perpendicularity and the angle of penetration of the model pile as claimed in claim 1, wherein the X-axis driving track system (2), the Y-axis driving track system (3) and the Z-axis driving track system (4) are identical in structure, the X-axis driving track system (2) is composed of an X-axis track (201) and an X-axis slider (202) installed on the X-axis track (201), the Y-axis driving track system (3) is composed of a Y-axis track (301) and a Y-axis slider (302) installed on the Y-axis track (301), and the Z-axis driving track system (4) is composed of a Z-axis track (401) and a Z-axis slider (402) installed on the Z-axis track (401).
3. An auxiliary device for ensuring the perpendicularity and the angle of the penetration of a model pile as claimed in claim 2, wherein the pile clamping mechanism (5) comprises a pile clamping base (501) and a pile clamping cover (502) which are fixedly mounted on a Z-axis slide block (402) of a Z-axis driving track system (4);
and the pile clamping base (501) and the pile clamping cover (502) clamp the model pile (6) between the pile clamping base (501) and the pile clamping cover (502) through screwing bolts by hands.
4. The auxiliary device for ensuring the perpendicularity and the angle of the model pile penetration as claimed in claim 3, wherein an elongated window is formed in the middle of the pile clamping cover (502), the front and the rear of the inside of the window are provided with the aiming lines (9), when the center line of the strain gauge on the model pile (6) and the two aiming lines (9) form three lines which are in the same plane, the model pile (6) is in a vertical state without deflection, and the strain gauge on the model pile is over against the loading device.
5. An auxiliary device for ensuring the perpendicularity and angle of penetration of a model pile as defined in claim 3, wherein the hammering auxiliary simulation module (7) comprises:
the hammering installation base (701), and the hammering installation base (701) is installed on the pile clamping base (501);
the rail cabinet (702), the rail cabinet (702) is installed on the hammering installation base (701), and the rail cabinet (702) is perpendicular to the hammering installation base (701);
the grooves (703), each groove (703) is arranged on the surface of the inner wall of the track cabinet (702), and each group of grooves (703) are arranged oppositely;
the driving piece (704) is installed at the upper end of the track cabinet (702), and the output end of the driving piece (704) can penetrate through a plate body at the upper end of the track cabinet (702);
the heavy hammer (705), the heavy hammer (705) is connected with the output end of the driving piece (704);
the guide protrusions (706) are positioned on two sides of the heavy hammer (705), and the guide protrusions (706) are embedded in the grooves (703).
6. An auxiliary device for ensuring the perpendicularity and angle of penetration of a model pile as claimed in claim 5, wherein when the driving member is a rotary output driving member, a guide mechanism (707) is further provided between the output end of the driving member (704) and the weight (705).
7. An auxiliary device for ensuring the perpendicularity and angle of penetration of a model pile as defined in claim 6, wherein the guide mechanism (707) comprises:
the spiral guide post (7071), the spiral guide post (7071) is positioned between the output end of the driving piece (704) and the heavy hammer (705);
a guide groove (7072), the guide groove (7072) opening on an outer surface of the helical guide post (7071);
the mounting hole (7073), the said mounting hole (7073) opens on the surface of the weight (705);
the guide block (7074) is movably arranged on the inner wall surface of the mounting hole (7073), and the guide block (7074) is embedded in the guide groove (7072) so that the guide block (7074) can move along the track of the guide groove (7072).
8. An auxiliary device for ensuring the perpendicularity and angle of penetration of a model pile as defined in claim 3, wherein the static pressure auxiliary simulation module (8) comprises:
the U-shaped groove (807), the U-shaped groove (807) is a groove body with a continuous rack (8071);
the static pressure mounting base (801), wherein the static pressure mounting base (801) is mounted on the pile clamping base (501);
the mounting plates (802), at least one group of the mounting plates (802) are arranged on the static pressure mounting base (801) in parallel;
the double-output rotary driving part (803) is arranged between the mounting plates (802), and the output ends of the double-output rotary driving part (803) penetrate through the corresponding mounting plates (802);
eccentrics (804), the centre of each eccentric (804) being mounted on the output of a corresponding dual output rotary drive (803);
eccentric guide posts (805), each eccentric guide post (805) being mounted on a corresponding mounting plate (802);
the eccentric rods (806), one end of each eccentric rod (806) is hinged and installed on the corresponding eccentric wheel (804), and the eccentric guide bulge (8061) on the other end of each eccentric rod is positioned in the continuous rack (8071) of the U-shaped groove (807);
the eccentric rod long hole (808), the eccentric rod long hole (808) is arranged on the eccentric rod (806);
the eccentric guide column (805) is positioned in the eccentric rod long hole (808).
9. An auxiliary device for ensuring the perpendicularity and the angle of penetration of a model pile as claimed in claim 8, wherein the angle adjusting mounting base (1001) is fixedly mounted on a Y-axis slide block (302);
the angle adjusting long hole (1002) is positioned on the U-shaped groove (807).
10. A method for ensuring the perpendicularity and the angle of penetration of a model pile by using the auxiliary device according to any one of claims 1 to 9,
s1, filling a sand layer in the model box (1);
s2, clamping the model pile (6) on the device through a pile clamping mechanism (5);
s3, selecting a designated position and height by the model pile through adjusting the X-axis driving track system (2), the Y-axis driving track system (3) and the Z-axis driving track system (4);
s4, the model pile (6) in the S3 is inserted into the model box (1) in the S1, and experiments of soil surfaces at different positions and different heights are realized;
s5, adjusting the angle of the device through an angle adjusting mechanism (10) to adjust the penetration angle of the model pile (6);
s6, optionally installing a hammering auxiliary simulation module (7) or a static pressure auxiliary simulation module (8) on the pile clamping mechanism (5);
s7, if the hammering auxiliary simulation module (7) is selected to be installed, the model pile (6) is driven through the reciprocating free falling motion of the heavy hammer, the actual piling process of the oil hammer pile driver is simulated, and the simulation of different hammering energies is realized by changing the weight of the heavy hammer;
s8, if the static pressure auxiliary simulation module (8) is selected to be installed, the model pile (6) simulates the static pressure process of the actual pile foundation through a circular reciprocating motion mode;
s9, collecting data feedback of the strain gauge on the model pile (6), and providing data for researching the pile driving construction process and the bearing capacity problem of the pile foundation.
CN202210478191.7A 2022-05-05 2022-05-05 Auxiliary device and method for ensuring model pile injection verticality and angle Active CN114577644B (en)

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