CN108532654B - Crawler-type movable stacking platform for static load and flat plate load test method - Google Patents
Crawler-type movable stacking platform for static load and flat plate load test method Download PDFInfo
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- CN108532654B CN108532654B CN201810619321.8A CN201810619321A CN108532654B CN 108532654 B CN108532654 B CN 108532654B CN 201810619321 A CN201810619321 A CN 201810619321A CN 108532654 B CN108532654 B CN 108532654B
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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 discloses a crawler-type movable stacking platform for static load, which comprises a bearing system, a power system, a crawler chassis system and a static load test system, wherein the stacking platform takes the crawler chassis as a travelling and moving mode, and the power source of the stacking platform is the power system integrated in the middle of a bearing longitudinal beam. The two tracks are connected by a connecting beam of the track chassis to form a track chassis system. The bearing longitudinal beam and the power system are both arranged on the bearing cross beam through bolts. The bearing cross beam is connected with the connecting beam of the crawler chassis through bolts. The bearing cross beam, the bearing longitudinal beam and the telescopic hydraulic supporting device are used as bearing and supporting systems and mainly support and bear the weight. The stacking platform has the characteristics of simplicity in operation, convenience in movement, low requirements on sites and short test period.
Description
Technical Field
The invention belongs to the field of foundation static load tests, and particularly relates to a crawler-type movable stacking platform for static load and a flat plate load test method.
Background
Currently, among various methods for testing the bearing capacity of a foundation (including a composite foundation and a vertical reinforcement), a flat plate load test is the earliest and most widely applied in-situ test method which is recognized as the most accurate and reliable test result and is listed in various engineering specifications or regulations of various countries. The test simulates the actual working state of a foundation or a foundation, loads are applied to rigid bearing plates of a certain size in a grading manner, and in-situ tests of deformation conditions of the foundation (comprising the composite foundation and the vertical reinforcement) along with pressure changes under the action of loads of all levels are observed.
The plate load test must be provided with sufficient counter force by a counter force system, which is typically either a stacking method and a ground anchor method, or a combination of both. The current common method is a stacking method, and the stacking material mainly comprises sand stone and concrete blocks. The counter-force system taking sand and stone as a stacking material is mainly completed by manual stacking, the method has lower requirements on a test site, but is troublesome and laborious, the test preparation time is long, the whole period is too long, and the test cost is increased year by year along with the improvement of the labor cost. The counter-force system using concrete blocks as main stacking materials is mainly completed by machinery, and the method mainly uses large machinery such as a crane to hoist the counter-force system, so that the requirement on a test site is relatively high, the passing requirement of the large machinery can be met, the test cost is relatively high, and the test period is relatively short. The use of large machinery has resulted in certain limitations of this method, inability to perform poor field or slab load tests in the pit.
The ground anchor method is to pre-set enough anchor piles at test points to serve as a counterforce system, and the method has the following defects although large-scale machinery or a large amount of manpower are not needed for installation during the test: 1. the construction cost of the anchor pile is high, and the anchor pile is generally difficult to effectively use after the test; 2. the test has high requirements on the construction quality of the used anchor rod, has enough bearing capacity and cannot deform greatly, otherwise, the anchor rod pile is easily pulled out due to uneven stress; 3. during the test, the anchor pile has a certain influence on the test precision due to the influence of the anchor pile on the soil layer.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the stacking platform which is simple to operate, convenient to move, low in field requirement and short in test period.
The technical scheme is as follows:
the invention firstly discloses a crawler-type movable stacking platform for static load, which comprises a bearing system, a power system, a crawler chassis system and a static load test system, wherein the bearing system comprises a base plate, a base plate and a base plate, wherein the base plate is arranged on the base plate, and the base plate is connected with the base plate:
-a load bearing system: the hydraulic support device comprises a bearing cross beam, bearing longitudinal beams and a telescopic hydraulic support device, wherein the bearing longitudinal beams are arranged on the bearing cross beam through bolts, the number of the bearing cross beams serving as bearing main beams is at least 2, and the bearing longitudinal beams serving as bearing secondary beams; the bearing cross beam is connected with a connecting beam of the crawler chassis system through bolts; the hydraulic supporting device is arranged on the bearing cross beam, and a concrete balancing weight is placed on the bearing longitudinal beam;
-a power system: the power system is arranged at the gap part of the bearing longitudinal beam through bolts;
-a track chassis system: the device is a walking and moving device of the stacking platform; the crawler chassis system comprises crawler chassis at two sides and connecting beams connecting the crawler chassis at two sides, wherein the connecting beams are parallel to the bearing longitudinal beams, and the crawler chassis is parallel to the bearing cross beams;
-a static load test system: the lifting jack is connected with the movable end of the hydraulic jack expansion device, the hydraulic jack expansion device is fixed on the bearing longitudinal beam, and the lifting jack is movable below the bearing cross beams based on the hydraulic jack expansion device to realize pushing and withdrawing actions; the load plate is horizontally arranged, a jack is fixed on the load plate, two sides of the load plate are connected to the bearing cross beam through slings, and homing of the load plate and the jack is realized through slings below the load plate and contacts with a test point; the reference pile is driven into the ground, the reference beam is arranged on the reference pile, and the dial indicators are arranged on the reference beam.
Preferably, the counter-force beam of the jack is connected with the bearing cross beam through a crankshaft.
Specifically, the hydraulic supporting device comprises a supporting jack, a supporting chassis, a supporting inner sleeve beam, a supporting outer sleeve beam and a telescopic jack, wherein two hydraulic supporting devices which are parallel to the bearing longitudinal beam are respectively arranged at two ends of the stacking platform, and the two hydraulic supporting devices at each end face each other in a head-to-tail mode: the supporting outer sleeve beam is parallel to the bearing longitudinal beam and is fixed on the bearing cross beam, the bottom of the supporting outer sleeve beam is sealed and is used for fixing the chassis of the telescopic jack, and the bottom of the supporting outer sleeve beam is the tail part of the hydraulic supporting device; the telescopic jack performs telescopic action in the supporting outer sleeve beam, the telescopic end of the telescopic jack is used for fixing one end of the supporting inner sleeve beam, the other end of the supporting inner sleeve beam is used for fixing the supporting jack, the movable end is arranged below the supporting jack, the supporting chassis is fixed, and the supporting chassis is the head part of the hydraulic supporting device; the expansion direction of the supporting jack is vertical to a plane formed by the bearing cross beam and the bearing longitudinal beam; the supporting jack completes the transverse displacement adjustment of the supporting jack based on the telescopic jack, so that the independent control of the supporting jack at four corners of the stacking platform is realized.
Preferably, the power system is a motor driving a high-pressure oil pump.
Specifically, the crawler chassis includes: hydraulic motor, supporting wheel, bearing portion, follower, track: the hydraulic motor and the driven wheel are respectively arranged at two ends of the bearing part, the hydraulic motor is controlled by the power system to rotate, and the driven wheel is driven by the crawler belt to drive; the supporting wheel is arranged below the bearing part and is driven by the crawler belt to drive; the hydraulic motor, the supporting wheel and the driven wheel jointly support the crawler belt.
The invention also discloses a flat plate load test method based on the static load crawler-type movable stacking platform, which comprises the following steps:
s1: movement of stacking platform
S1-1: the hydraulic jack expansion device pulls and contracts the jack counter-force beam to enable the jack counter-force Liang Pianli to be above the jack, and at the moment, the load plate is lifted through the sling, so that the load plate and the jack above the load plate are lifted together to be separated from the ground;
s1-2: the hydraulic support device is in a contracted state: the telescopic jack contracts to drive the supporting inner sleeve beam to contract in the supporting outer sleeve beam; the supporting jack contracts to drive the supporting chassis to separate from the ground;
s1-3: only the tracks in the track chassis system are in contact with the ground at the moment: the stacking platform carries out forward and backward operation based on a hydraulic motor, and carries out left steering and right steering by utilizing the speed difference of the two tracks; finally, the crawler chassis moves the stacking platform to the position of the test point, so that the center of the load plate coincides with the center of the test point;
s2: test system installation
S2-1: lowering a sling to enable the load plate and the jack to return to a position, wherein the load plate is contacted with a test point;
s2-2: the hydraulic jack expansion device stretches out to push out the jack counter-force beam, so that the jack counter-force beam moves to the upper side of the jack along the lower side of the bearing cross beam;
s2-3: the telescopic jack stretches out, so that the supporting inner sleeve beam stretches out of the supporting outer sleeve beam, and the stretching length is determined by site conditions;
s2-4: extending the supporting jack to drive the supporting chassis to contact the ground so as to bear pressure;
s2-5: continuously lifting the supporting jack to enable the crawler belt to be separated from the ground, and enabling the whole stacking platform to bear load by the supporting jack; in the lifting process of the supporting jack, the flatness of the whole system is observed through a level gauge arranged on the bearing beam, and when the stacking platform is not horizontal, the hydraulic supporting device is regulated to enable the stacking platform to be in a horizontal state;
s2-6: driving a reference pile into the ground to a certain depth, wherein the depth meets the requirement of a use standard in a flat plate load test, mounting a reference beam on the reference pile, and erecting a plurality of dial indicators on the reference beam to complete the mounting of the whole test system;
s3: performing a test
Performing a flat plate load test according to conventional operation;
s4: stacking platform retraction
S4-1: dismantling a reference beam, a reference pile and a dial indicator;
s4-2: the hydraulic jack expansion device pulls and contracts the jack counter-force beam to deviate from the jack top;
s4-3: the load plate (9) is lifted by the sling (14), so that the load plate (9) and the jack (8) above the load plate are lifted together to separate from the ground, and the running requirement of the crawler chassis is met;
s4-4: the hydraulic support device in the load bearing system is then in a contracted state: the telescopic jack contracts to drive the supporting inner sleeve beam to contract in the supporting outer sleeve beam; the supporting jack contracts to drive the supporting chassis to separate from the ground;
s4-5: only the tracks in the track chassis system are in contact with the ground at the moment: the stacking platform carries out forward and backward operation based on a hydraulic motor, and carries out left steering and right steering by utilizing the speed difference of the two tracks; and finally, the stacking platform is moved to a target position by the crawler chassis.
As another test method, a deep load plate test and a rock base load test were performed by replacing the load plate with a steel column.
And as another test method, removing the concrete balancing weight placed on the bearing longitudinal beam, replacing the counter-force beam on the jack with a pulling-resistant device, and performing an anchor rod pulling-resistant test.
The beneficial effects of the invention are that
The crawler-type movable stacking platform for static load has the characteristics of small volume, flexible movement, convenient installation, short test period, low test cost, strong adaptability and the like, and can meet the flat plate load test under various complex field conditions.
Compared with other inventions and the prior art, the invention has the following innovation points:
1. the hydraulic supporting device is designed, can flexibly cope with various uneven sites such as pits, high and low fluctuation and the like, has large distance between the supporting points and the test points, and can meet the requirement of the standard on a counterforce system.
2. The invention designs a contractible static load test system which is integrated in the invention patent, can contract away from the ground during running, keeps a certain height and can freely move down to a test point during test. The device does not need to be additionally provided with or carried with detection equipment, and is convenient, economical and practical.
Drawings
FIG. 1 is a side view of the present invention in a traveling state
FIG. 2, a plan view of the present invention in a traveling state
FIG. 3, front view of the present invention in a traveling state
FIG. 4, top view of the invention in the test state
FIG. 5, front view of the invention in the test state
FIG. 6 is a top view of the crawler chassis system of the present invention
FIG. 7 is a front view of the crawler chassis system of the present invention
FIG. 8 is a side view of the track chassis system of the present invention
FIG. 9, top view of the load bearing and support system of the present invention
FIG. 10, front view of the load bearing and support system of the present invention
FIG. 11, a side view of the load bearing and support system of the present invention
FIG. 12 is a top view of the static load test system of the present invention
FIG. 13 is a side view of the static load test system of the present invention
FIG. 14 is a front view of the static load test system of the present invention
Detailed Description
The invention is further illustrated below with reference to examples, but the scope of the invention is not limited thereto:
the structure of the stacking platform:
referring to fig. 1-3, the stacking platform comprises a bearing system, a power system 16, a crawler chassis system and a static load test system, wherein the crawler chassis 1 is used as a travelling and moving mode, and the power source of the stacking platform is the power system 16 integrated in the middle of the bearing longitudinal beam 5. The two tracks 1-5 are connected by a connecting beam 2 of the track chassis 1 to form a track chassis system. The load-bearing longitudinal beam 5 and the power system 16 are both mounted on the load-bearing cross beam 4 through bolts. The bearing cross beam 4 is connected with the connecting beam 2 of the crawler chassis 1 through bolts. The load-bearing cross beam 4, the load-bearing longitudinal beam 5 and the telescopic hydraulic support device 3 serve as a load-bearing and supporting system which mainly supports and bears the load.
Referring to fig. 9-11, the hydraulic supporting device 3 comprises a supporting jack 3-1, a supporting chassis 3-2, a supporting inner sleeve beam 3-3, a supporting outer sleeve beam 3-4 and a telescopic jack 3-5: two hydraulic supporting devices 3 which are parallel to the bearing longitudinal beam 5 are respectively arranged at two ends of the stacking platform, and the two hydraulic supporting devices 3 at each end face each other in a head-tail mode: the supporting outer sleeve beams 3-4 are parallel to the bearing longitudinal beams 5 and fixed on the bearing cross beams 4, the bottoms of the supporting outer sleeve beams 3-4 are sealed, the chassis of the telescopic jack 3-5 is fixed, and the bottoms of the supporting outer sleeve beams 3-4 are the tail parts of the hydraulic supporting devices 3; the telescopic jack 3-5 performs telescopic action in the supporting outer sleeve beam 3-4, one end of the supporting inner sleeve beam 3-3 is fixed at the telescopic end of the telescopic jack 3-5, the supporting jack 3-1 is fixed at the other end of the supporting inner sleeve beam 3-3, the movable end is arranged below the supporting jack 3-1 and is used for fixing the supporting chassis 3-2, and the supporting chassis 3-2 is the head part of the hydraulic supporting device 3; the expansion direction of the supporting jack 3-1 is vertical to a plane formed by the bearing cross beam 4 and the bearing longitudinal beam 5; the supporting jack 3-1 completes the self transverse displacement adjustment based on the telescopic jack 3-5, thereby realizing the independent control of the supporting jacks at four corners of the stacking platform.
The upper part of the bearing longitudinal beam 5 is provided with a concrete balancing weight 10 for providing counter force for the whole system. The static load test system consists of a jack counter-force beam 6, a hydraulic jack telescopic device 7, a jack 8, a load plate 9, a reference beam 11, a dial indicator 12, a reference pile 13 and a sling 14.
Referring to fig. 6 to 8, the crawler chassis 1 includes a hydraulic motor 1-1, a supporting wheel 1-2, a bearing part 1-3, a driven wheel 1-4, and a crawler 1-5: the hydraulic motor 1-1 and the driven wheel 1-4 are respectively arranged at two ends of the bearing part 1-3, the hydraulic motor 1-1 is controlled by the power system 16 to rotate, and the driven wheel 1-4 is driven by the crawler belt 1-5 to drive; the supporting wheel 1-2 is arranged below the bearing part 1-3, and the supporting wheel 1-2 is driven by the crawler belt 1-5 to drive; the hydraulic motor 1-1, the supporting wheel 1-2 and the driven wheel 1-4 jointly support the crawler belt 1-5.
When the stacking platform moves:
the hydraulic jack telescoping device 7 pulls back the jack counter-force beam 6 to deviate from the upper part of the jack 8, and at the moment, the load plate 9 is lifted by the sling 14, so that the load plate 9 and the jack 8 above the load plate are lifted together to separate from the ground, and the running requirement of the crawler chassis 1 is met. The hydraulic support device 3 in the load-bearing and support system is in a contracted state. The telescopic jack 3-5 contracts to drive the supporting inner sleeve beam 3-3 to contract in the supporting outer sleeve beam 3-4, and the supporting jack 3-1 contracts to drive the supporting chassis 3-2 to separate from the ground. At this time, only the tracks 1-5 in the track chassis 1 are in contact with the ground, and the system can move forward and backward and steer left and right by utilizing the speed difference of the two tracks.
During the test of the stacking platform:
with reference to fig. 4-5, the entire stacking platform is moved by the crawler chassis 1 to the test point position with the load plate 9 center coincident with the test point center. The slings 14 are then lowered to bring the load plate 9 and jack 8 into contact with the test point, after which the hydraulic jack extension 7 is extended to push out the jack reaction beam 6 (the jack reaction beam hangs down below the load beam 4, connected by bearings 15, fig. 14) to be located above the jack. After the steps are completed, the telescopic jack 3-5 stretches out to drive the supporting inner sleeve beam 3-3 to stretch out of the supporting outer sleeve beam 3-4, and the stretching length is determined according to site conditions. Then the supporting jack 3-1 is extended to drive the supporting chassis 3-2 to contact the ground to bear pressure. And then continuously lifting the supporting jack 3-1 to separate the crawler chassis from the ground, wherein the whole system is provided with the supporting jack 3-1 for bearing. In the lifting process of the supporting jack 3-1, a level gauge arranged on the bearing beam 4 is observed to observe the flatness of the whole system, and when the system is not horizontal, the hydraulic supporting device 3 is regulated to enable the system to be in a horizontal state.
After the above work is completed, referring to fig. 12 to 13, the reference pile 13 is driven into the ground to a certain depth (the requirement of the specification for use in the flat load test should be satisfied), the reference beam 11 is mounted on the reference pile, and the dial gauge 12 (the number is determined according to the specification requirement) is erected on the reference beam. At this time, the whole test system is installed, and the test can be started.
In a preferred embodiment, the panel load test is performed in accordance with building foundation design Specification GB 50007-2011.
When the stacking platform is retracted:
and dismantling the reference beam 11, the reference pile 13 and the dial indicator 12, and placing the materials at the corresponding initial positions of the crawler-type movable stacking platform for static load. Then, the hydraulic jack telescoping device 7 pulls the jack counter-force beam 6 to deviate from the upper part of the jack 8, and at the moment, the load plate 9 is lifted through the sling 14, so that the load plate 9 and the jack 8 above the load plate are lifted together to separate from the ground, and the running requirement of the crawler chassis is met. The hydraulic support device 3 in the load-bearing and support system is in a contracted state. The telescopic jack 3-5 contracts to drive the supporting inner sleeve beam 3-3 to contract in the supporting outer sleeve beam 3-4, and the supporting jack 3-1 contracts to drive the supporting chassis 3-2 to separate from the ground.
Only the tracks 1-5 in the crawler chassis system are in contact with the ground at this time: the stacking platform carries out forward and backward operation based on the hydraulic motor 1-1 and carries out left steering and right steering by utilizing the speed difference of the two tracks 1-5; the palletizing platform is finally moved to the target position by the crawler chassis 1.
Although the above detailed description has been made with reference to the accompanying drawings for the purpose and idea of the present invention, those skilled in the art will recognize the purpose and idea of the present invention. Various modifications and changes may be made thereto without departing from the scope of the invention as defined in the appended claims, such as: 9 load plates are replaced by steel columns, so that a deep load plate test and a rock base load test can be performed; and removing the concrete counterweight 10, and replacing the counter-force beam 6 on the jack with a pulling-resistant device, so that an anchor rod pulling-resistant test and the like can be performed. Modifications and variations similar to this are within the scope of the claims of the present patent.
Claims (8)
1. The crawler-type movable stacking platform for static load is characterized by comprising a bearing system, a power system (16), a crawler chassis (1) and a static load test system:
-a load bearing system: the hydraulic support device comprises bearing cross beams (4), bearing longitudinal beams (5) and telescopic hydraulic support devices (3), wherein the bearing longitudinal beams (5) are arranged on the bearing cross beams (4) through bolts, the number of the bearing cross beams (4) serving as bearing main beams is at least 2, and the bearing longitudinal beams (5) serving as bearing secondary beams; the bearing cross beam (4) is connected with the connecting beam (2) of the crawler chassis system through bolts; the hydraulic supporting device (3) is arranged on the bearing cross beam (4), and a concrete balancing weight (10) is placed on the bearing longitudinal beam (5);
-a power system (16): the power system (16) is arranged at the gap part of the bearing longitudinal beam (5) through bolts;
-a track chassis system: the device is a walking and moving device of the stacking platform; the crawler chassis system comprises crawler chassis (1) at two sides and a connecting beam (2) connected with the crawler chassis (1) at two sides;
-a static load test system: the hydraulic jack comprises a jack upper counter-force beam (6), a hydraulic jack telescopic device (7), a jack (8), a load plate (9), a reference beam (11), a dial indicator (12), a reference pile (13) and a sling (14), wherein the jack upper counter-force beam (6) spans 2 bearing cross beams (4) and is hung below the bearing cross beams (4), the jack upper counter-force beam (6) is connected with the movable end of the hydraulic jack telescopic device (7), and the hydraulic jack telescopic device (7) is fixed on a bearing longitudinal beam (5); the load plate (9) is horizontally arranged, the jack (8) is fixed on the load plate (9), and two sides of the load plate (9) are connected to the bearing cross beam (4) through slings (14); the reference pile (13) is driven into the ground, the reference beam (11) is arranged on the reference pile (13), and a plurality of dial indicators (12) are arranged on the reference beam; the reaction beam (6) of the jack is connected with the bearing cross beam (4) through a curved bearing (15); the connecting beam (2) is parallel to the bearing longitudinal beam (5), and the crawler chassis (1) is parallel to the bearing cross beam (4).
2. A crawler-type mobile stacking platform for static load according to claim 1, characterized in that the number of load bearing stringers (5) is 4 and the number of load bearing crossbeams (4) is 2.
3. The crawler-type movable stacking platform for static load according to claim 1, wherein the hydraulic supporting device (3) comprises a supporting jack (3-1), a supporting chassis (3-2), a supporting inner sleeve beam (3-3), a supporting outer sleeve beam (3-4) and a telescopic jack (3-5), two hydraulic supporting devices (3) which are parallel to the bearing longitudinal beam (5) are respectively arranged at two ends of the stacking platform, and the two hydraulic supporting devices (3) at each end face each other in a head-to-tail mode: the supporting outer sleeve beams (3-4) are parallel to the bearing longitudinal beams (5) and fixed on the bearing transverse beams (4), the bottoms of the supporting outer sleeve beams (3-4) are sealed, the chassis of the telescopic jack (3-5) is fixed, and the bottoms of the supporting outer sleeve beams (3-4) are the tail parts of the hydraulic supporting devices (3); the telescopic jack (3-5) performs telescopic action in the supporting outer sleeve beam (3-4), one end of the supporting inner sleeve beam (3-3) is fixed at a telescopic end of the telescopic jack (3-5), the supporting jack (3-1) is fixed at the other end of the supporting inner sleeve beam (3-3), the movable end is arranged below the supporting jack (3-1) and is used for fixing the supporting chassis (3-2), and the supporting chassis (3-2) is the head part of the hydraulic supporting device (3); the expansion direction of the supporting jack (3-1) is vertical to the plane formed by the bearing cross beam (4) and the bearing longitudinal beam (5).
4. A crawler-type mobile stacking platform for static load according to claim 1, wherein the power system (16) is a motor driving a high-pressure oil pump.
5. A crawler-type mobile palletizing platform for static load according to claim 1, characterized in that said crawler chassis (1) comprises: the hydraulic machine comprises a hydraulic motor (1-1), supporting wheels (1-2), a bearing part (1-3), driven wheels (1-4) and a crawler belt (1-5): the hydraulic motor (1-1) and the driven wheel (1-4) are respectively arranged at two ends of the bearing part (1-3), the hydraulic motor (1-1) is controlled to rotate by the power system (16), and the driven wheel (1-4) is driven by the crawler belt (1-5) to drive; the supporting wheel (1-2) is arranged below the bearing part (1-3), and the supporting wheel (1-2) is driven by the crawler belt (1-5) to drive; the hydraulic motor (1-1), the supporting wheel (1-2) and the driven wheel (1-4) jointly support the crawler belt (1-5).
6. A flat plate load test method of a crawler-type mobile stacking platform for static load according to any one of claims 1 to 5, characterized in that it comprises the following steps:
s1: movement of stacking platform
S1-1: the hydraulic jack telescoping device (7) pulls and contracts the jack counter-force beam (6) to enable the jack counter-force beam (6) to deviate from the position above the jack (8), and at the moment, the load plate (9) is lifted through the sling (14) to enable the load plate (9) and the jack (8) above the load plate to be lifted together so as to be separated from the ground;
s1-2: the hydraulic support device (3) is in a contracted state: the telescopic jack (3-5) contracts to drive the supporting inner sleeve beam (3-3) to contract in the supporting outer sleeve beam (3-4); the supporting jack (3-1) contracts to drive the supporting chassis (3-2) to separate from the ground;
s1-3: only the tracks (1-5) in the track chassis system are in contact with the ground at this time: the stacking platform carries out forward and backward operation based on the hydraulic motor (1-1) and carries out left steering and right steering by utilizing the speed difference of the two tracks (1-5); finally, the crawler chassis (1) moves the stacking platform to the position of the test point, so that the center of the load plate (9) coincides with the center of the test point;
s2: test system installation
S2-1: lowering the hoist rope (14) to restore the load plate (9) and the jack (8), wherein the load plate (9) is contacted with the test point;
s2-2: the hydraulic jack expansion device (7) stretches out to push out the jack counter-force beam (6), so that the jack counter-force beam (6) moves to the upper part of the jack (8) along the lower part of the bearing cross beam (4);
s2-3: the telescopic jack (3-5) stretches out, so that the supporting inner sleeve beam (3-3) stretches out of the supporting outer sleeve beam (3-4), and the stretching length is determined by site conditions;
s2-4: extending the supporting jack (3-1) to drive the supporting chassis (3-2) to contact the ground so as to bear pressure;
s2-5: continuously lifting the supporting jack (3-1) to separate the crawler belt (1-5) from the ground, and bearing the whole stacking platform by the supporting jack (3-1); in the lifting process of the supporting jack (3-1), the flatness of the whole system is observed through a level gauge arranged on the bearing beam (4), and when the stacking platform is not horizontal, the hydraulic supporting device (3) is regulated to enable the stacking platform to be in a horizontal state;
s2-6: driving a reference pile (13) into the ground for a certain depth, wherein the depth meets the requirement of a use standard in a flat plate load test, installing a reference beam (11) on the reference pile (13), and erecting a plurality of dial indicators (12) on the reference beam to complete the installation of the whole test system;
s3: performing a test
Performing a flat plate load test according to conventional operation;
s4: stacking platform retraction
S4-1: dismantling the reference beam (11), the reference pile (13) and the dial indicator (12);
s4-2: the hydraulic jack expansion device (7) pulls and contracts the jack counter-force beam (6) to deviate from the upper part of the jack (8);
s4-3: the load plate (9) is lifted by the sling (14), so that the load plate (9) and the jack (8) above the load plate are lifted together to separate from the ground, and the running requirement of the crawler chassis is met;
s4-4: the hydraulic support device (3) in the load-bearing system is then in a contracted state: the telescopic jack (3-5) is contracted to drive the supporting inner sleeve beam (3-3) to be contracted in the supporting outer sleeve beam (3-4); the supporting jack (3-1) contracts to drive the supporting chassis (3-2) to separate from the ground;
s4-5: only the tracks (1-5) in the track chassis system are in contact with the ground at this time: the stacking platform carries out forward and backward operation based on the hydraulic motor (1-1) and carries out left steering and right steering by utilizing the speed difference of the two tracks (1-5); finally, the stacking platform is moved to a target position by the crawler chassis (1).
7. The flat load test method of the crawler-type mobile stacking platform for static load according to claim 6, wherein the load plate (9) is replaced by a steel column, and a deep load plate test and a rock base load test are performed.
8. The flat plate load test method of the crawler-type movable stacking platform for static load according to claim 6, wherein the concrete balancing weights (10) placed on the bearing longitudinal beams (5) are removed, the counter-force beams (6) on the jacks are replaced by anti-pulling devices, and an anchor rod anti-pulling test is performed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810619321.8A CN108532654B (en) | 2018-06-15 | 2018-06-15 | Crawler-type movable stacking platform for static load and flat plate load test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810619321.8A CN108532654B (en) | 2018-06-15 | 2018-06-15 | Crawler-type movable stacking platform for static load and flat plate load test method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108532654A CN108532654A (en) | 2018-09-14 |
| CN108532654B true CN108532654B (en) | 2023-09-15 |
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| CN109987160A (en) * | 2019-05-10 | 2019-07-09 | 四川中亿创新重型装备有限公司 | A kind of dual-gripper crawler travel combined type static load device and method |
| CN111206558A (en) * | 2020-03-06 | 2020-05-29 | 中铁西北科学研究院有限公司 | Movable full-automatic trolley for detecting foundation bearing capacity and detection method |
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| CN108532654A (en) | 2018-09-14 |
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