CN112878396A - Tubular pile compression test device and test method - Google Patents
Tubular pile compression test device and test method Download PDFInfo
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- CN112878396A CN112878396A CN202110258653.XA CN202110258653A CN112878396A CN 112878396 A CN112878396 A CN 112878396A CN 202110258653 A CN202110258653 A CN 202110258653A CN 112878396 A CN112878396 A CN 112878396A
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- tubular pile
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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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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
A tubular pile compression test device and a test method are characterized in that a load platform is composed of a sleeve, a stiffening rib plate and a balance weight bearing plate to form an inverted trapezoidal structure, the load platform is sleeved at the top of a tubular pile, a heavy balance weight block and a light balance weight block are stacked on the balance weight bearing plate of the load platform, a sinking scale is arranged on the tubular pile, a positioning line is horizontally fixed and is arranged in close proximity to the tubular pile and located in the position range of the sinking scale. During the test, pile the balancing weight toward the load platform in turn, observe and record the amount of sinking of tubular pile through observing the setting element, judge whether the tubular pile is qualified. The device has the characteristics of light weight and small size, can be suitable for ten-thousand-level tubular pile arrays, and meets the requirements of tubular pile pressure resistance test detection in the construction process of a photovoltaic power generation project.
Description
Technical Field
The invention relates to the technical field of a tubular pile pulling resistance test, in particular to a tubular pile pulling resistance test device and a tubular pile pulling resistance test method suitable for a photovoltaic power generation project half-rock half-soil bearing layer.
Background
In the photovoltaic power generation project, the photovoltaic support widely adopts the prestressed pipe pile buried in half rock half soil bearing layer as the foundation and the bearing column, and is a structure of half buried foundation and half exposed column. In a photovoltaic power generation project, the compressive strength of the tubular pile has certain requirements, so that the compressive strength of the tubular pile needs to be tested, and whether the compressive strength of the tubular pile is qualified or not is detected. At present, the domestic anti-pressure test method is mainly applied to detection and acceptance in constructional engineering, tests are generally carried out on the ground of large-tonnage and large-diameter underground engineering piles, pull anchor counter-force beams are mostly adopted for testing, and a test device is large and heavy.
In a photovoltaic power generation project, the compressive strength (vertical static load) of the tubular pile is required to be within 50KN, if the existing domestic anti-pulling test method is used, the inapplicability of a large horse-drawn trolley in a small compressive strength test of large-scale test equipment is undoubtedly existed, in the photovoltaic power generation project, the number of the tubular piles is more than ten thousand, under the constraint of the subsequent assembly installation period, the condition of applying large-scale test equipment does not exist in the tubular pile array, and the test pressure is very large.
Disclosure of Invention
The invention aims to solve the technical problems and provides a tubular pile compression test device and a tubular pile compression test method, which have the characteristics of light weight and small volume, can be suitable for ten thousand-level tubular pile arrays and meet the requirements of tubular pile compression test detection in the construction process of a photovoltaic power generation project.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides a tubular pile compression test device, includes to bury underground in subaerial tubular pile, includes load platform, counter weight group and observation setting element, load platform includes sleeve, stiffening rib board and counter weight carrier plate, the counter weight carrier plate is fixed at telescopic top, the area of counter weight carrier plate is greater than sleeve top area, the stiffening rib board is the triangle-shaped structure, the stiffening rib board is the circumference array and sets up on telescopic outer wall, and extends to the counter weight carrier plate on, makes and forms the trapezoidal structure between sleeve, stiffening rib board and the counter weight carrier plate, the diameter of sleeve is greater than the diameter of tubular pile, the load platform is inserted at the top of tubular pile through the sleeve cover; the counterweight group includes a heavy balancing weight and at least one light-duty balancing weight, the weight of heavy balancing weight is greater than the weight of light-duty balancing weight, stack on the counter weight carrier plate from up in proper order down heavy balancing weight and light-duty balancing weight, it includes dead lever, location line and the scale that sinks to survey the setting element, the scale that sinks is established on the tubular pile, and two dead levers are fixed subaerial respectively, the location line is through two dead lever levels fixed and tubular pile looks next-door neighbour's setting, and is located the position range of the scale that sinks.
As a further improvement of the structure, the diameter of the sleeve is 40-60 mm larger than that of the tubular pile, and the length of the sleeve is twice of that of the tubular pile; the counterweight bearing plate is of a square structure, and the side length is 3 times of the diameter of the tubular pile; the stiffening rib plates are arranged at intervals of 45 degrees.
As a further improvement of the structure of the invention, the four corners of the weight bearing plate are symmetrically provided with hanging rings.
As a further improvement of the structure, the heavy-duty balancing weight is a concrete precast block, a hole is formed in the top of the heavy-duty balancing weight, and a hanging ring is arranged in the hole.
As a further improvement of the structure, the light-weight balancing weights are steel plates, the light-weight balancing weights are different in size and weight, and the left side and the right side of each light-weight balancing weight are symmetrically provided with hanging rings respectively.
As a further improvement of the structure of the present invention, the observation positioning member further includes a level for reading a value of the positioning line corresponding to the sinking staff.
The invention also provides a tubular pile compression test method adopting the device, which comprises the following steps:
1) manually binding a load platform on the crane, and hoisting the load platform above the tubular pile after trial hoisting by the crane;
2) arranging herringbone ladders on the periphery of the tubular pile, manually standing on the herringbone ladders to support and guide the load platform sleeve to be inserted into the top of the tubular pile, removing the binding between the crane and the load platform, and finishing the installation of the load platform;
3) determining the weight of the heavy-duty balancing weight and the size, the weight and the number of the light-duty balancing weights according to the maximum bearing capacity of the tubular pile;
4) pile up heavy balancing weight on the counter weight carrier plate of load platform earlier through the hoist, then pile one or more light-duty balancing weight on heavy balancing weight, pile the in-process at every turn, observe and take notes the settlement of tubular pile through observing the setting element, judge whether qualified tubular pile.
As a further improvement of the method, in the step 4), in each stacking process, whether the tubular pile is overturned and broken or not and whether the counterweight block is unstably stacked or not are observed, and if the phenomenon occurs, the stacking of the counterweight block is stopped, and personnel are evacuated or emergency measures are taken.
As a further improvement of the method of the present invention, in step 4), during each stacking process, if the sinking amount of the pipe pile exceeds 30mm, stopping stacking, determining that the pipe pile is unqualified, after stacking to a designed value, stopping stacking, if the pipe pile does not sink for at least 10 minutes and the accumulated sinking amount is less than 30mm, determining that the pipe pile is qualified.
As a further improvement of the method, the method further comprises the step 5), after the test is finished, the counter weight block and the load platform are reversely dismantled and transferred to the next tubular pile for a cycle test.
The invention has the beneficial effects that:
firstly, the tooling is light in weight. The tubular pile compression test device disclosed by the invention has the advantages that the load platform, the counterweight group and the observation positioning piece are small-sized components, the anchor pulling counter-force beam is not needed to be matched, the tubular pile compression test device has the characteristics of light weight and small size, the requirement on site conditions is low, the tubular pile compression test device can be applied to tubular pile arrays of ten thousand levels, the problem that large-scale test equipment in densely-distributed photovoltaic tubular piles is difficult to put into operation is solved, meanwhile, the tubular pile compression test device is convenient to assemble and disassemble, the rapid transition test can be realized, and the tubular pile test.
Secondly, the stress system is reasonable and effective. The load platform is skillfully stressed, an inverted trapezoidal structure is formed among the sleeve, the stiffening rib plate and the balance weight bearing plate of the load platform, the load platform is directly sleeved and inserted into the top of the tubular pile through the sleeve, the upper load is directly transmitted to the top end of the tubular pile through the balance weight bearing plate, a small part of eccentrically stressed load is transmitted to the sleeve through the stiffening rib plate and is transmitted to the tubular pile body through the sleeve, the stress forms an inverted trapezoidal mode, the combined stress of the pile top and the pile body is effectively utilized, and a heavy stress system is avoided.
Thirdly, the method is simple and convenient. The tubular pile compression test device disclosed by the invention is simple in structure, convenient to use, convenient to assemble and disassemble, and capable of being repeatedly used, and a rapid transition test is realized, so that the tubular pile test efficiency is greatly improved, and the construction cost is reduced.
And fourthly, the applicability is strong. According to the invention, the heavy-duty balancing weight and the light-duty balancing weight are adopted for balancing weight, and the test requirements of tubular piles with different pile lengths and different static loads can be met through the combination of the heavy-duty balancing weight and different light-duty balancing weights.
Fifthly, the safety is high. According to the invention, the heavy-duty balancing weight and the light-duty balancing weight are adopted for balancing, the light-duty balancing weight can be stacked in a grading manner according to the sinking amount of the tubular pile in the test process, and the light-duty balancing weight can be stopped being stacked in time according to the sinking amount of the tubular pile, so that the tubular pile is prevented from overturning and breaking due to overlarge one-time load, and the safety in the test process is ensured.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the load platform structure of the present invention;
FIG. 3 is a schematic view of a weight stack according to the present invention;
FIG. 4 is a schematic view of the structure of the observation positioning member according to the present invention;
FIG. 5 is a schematic view of the construction state of the present invention;
description of the labeling: the device comprises a 1-tubular pile, a 2-loading platform, a 21-sleeve, a 22-stiffening rib plate, a 23-counterweight bearing plate, a 231-lifting ring, a 3-counterweight group, a 31-heavy counterweight, a 311-hole, a 312-lifting ring, a 32-light counterweight, a 321-lifting ring, a 4-observation positioning piece, a 41-fixed rod, a 42-positioning line, a 43-sinking staff and a 44-level.
Detailed Description
The invention is further described with reference to the following figures and specific embodiments.
The photovoltaic power generation system is successfully applied to 50MW photovoltaic power generation projects of official field reservoirs in Yangtze county, Zhanjiang city, Guangdong province.
As shown in fig. 1, a pipe pile compression test device comprises a pipe pile 1 buried on the ground, a load platform 2, a weight stack 3 and an observation positioning member 4.
As shown in fig. 2, the load platform 2 includes a sleeve 21, a stiffener 22, and a weight plate 23. The diameter of the sleeve 21 is 40 mm-60 mm larger than the diameter of the tubular pile 1, preferably 50mm in the embodiment, and the length of the sleeve 21 is twice of the diameter of the tubular pile 1. The stiffening ribs 22 are in the form of right-angled triangular structures. The counter weight carrier plate 23 is square structure, and the length of side is 3 times of tubular pile 1 diameter, and four angular position of counter weight carrier plate 23 go up the symmetry and are provided with rings 231 that are used for hoist and mount. The weight bearing plate 23 is fixed on the top of the sleeve 21 by welding, and the area is larger than that of the top of the sleeve 21. The stiffening rib plates 22 are arranged on the outer wall of the sleeve 21 in a circumferential array at intervals of 45 degrees and extend to the weight bearing plate 23, so that an inverted trapezoidal structure is formed among the sleeve 21, the stiffening rib plates 22 and the weight bearing plate 23. The loading platform 2 is inserted on the top of the tubular pile 1 through a sleeve 21.
As shown in fig. 3, the weight stack 3 includes a heavy weight 31 and a plurality of light weights 32. The weight of the heavy-duty balancing weight 31 and the size, the weight and the number of the light-duty balancing weight 32 are determined according to the maximum bearing capacity of the tubular pile 1. Heavy balancing weight 31 is the concrete prefabricated section, and the top is equipped with down trapezoidal hole 311, is provided with rings 312 that are used for hoist and mount in the hole 311. The light-duty balancing weight 32 is the steel sheet, and size, weight are inequality between the light-duty balancing weight 32, and the left and right sides of light-duty balancing weight 32 symmetry respectively is equipped with the rings 321 that are used for hoist and mount. The heavy-duty balancing weights 31 are stacked on the balancing bearing plate 23 of the loading platform 2, and the light-duty balancing weights 32 are sequentially stacked on the heavy-duty balancing weights 31.
As shown in fig. 4, the observation positioning member 4 includes fixing rods 41, a positioning line 42, a sinking staff 43 and a level gauge 44, the sinking staff 43 is disposed on the tubular pile 1, the two fixing rods 41 are respectively fixed on the ground, the positioning line 42 is horizontally fixed by the two fixing rods 41 and is closely adjacent to the tubular pile 1, and is located within the position range of the sinking staff 43. The level gauge 44 is used to read the value on the positioning line 42 corresponding to the sinking staff 43.
As shown in fig. 5, the steps of the compressive test of the tubular pile 1 by using the device are as follows:
1) manually binding the load platform 2 on the crane by utilizing a crane hook and a hanging ring 231 on the counterweight bearing plate 23, then carrying out trial hanging by the crane, and hanging the load platform 2 above the tubular pile 1 after the trial hanging is finished;
2) arranging herringbone ladders on the periphery of the tubular pile 1, manually standing on the herringbone ladders to support and guide the load platform 2 to be inserted into the top of the tubular pile 1, removing the binding between the crane and the load platform 2, and finishing the installation of the load platform 2;
3) determining the weight of the heavy-duty balancing weight 31 and the size, the weight and the number of the light-duty balancing weights 32 according to the maximum bearing capacity of the tubular pile 1;
4) pile up heavy balancing weight 31 on the counter weight carrier plate 23 of load platform 2 earlier through the hoist, then pile a plurality of light-duty balancing weight 32 on heavy balancing weight 31, pile the in-process at every turn, observe tubular pile 1 and have or not topple fracture phenomenon, the balancing weight has or not piles unstable phenomenon, if have above-mentioned phenomenon, then stop piling of balancing weight, personnel withdraw or adopt emergent measure. In addition, in each stacking process, the settlement of the tubular pile 1 needs to be observed and recorded through the observation positioning piece 4, and whether the tubular pile 1 is qualified or not is judged. Specifically, in each stacking process, if the sinking amount of the tubular pile 1 exceeds 30mm, stopping stacking, determining that the tubular pile 1 is unqualified, and after stacking to a designed value, stopping stacking, if the tubular pile 1 does not sink for at least 10 minutes and the accumulated sinking amount is less than 30mm, determining that the tubular pile 1 is qualified;
5) and after the test is finished, reversely removing the balancing weight and the load platform 2, transferring the balancing weight and the load platform to the next tubular pile 1, and performing a circulation test.
The above-mentioned embodiments are only for convenience of illustration and not intended to limit the invention in any way, and those skilled in the art will be able to make equivalents of the features of the invention without departing from the technical scope of the invention.
Claims (10)
1. The utility model provides a tubular pile compression test device, is including burying underground in subaerial tubular pile, its characterized in that: the load platform comprises a sleeve, a stiffening rib plate and a counterweight bearing plate, wherein the counterweight bearing plate is fixed at the top of the sleeve, the area of the counterweight bearing plate is larger than that of the top of the sleeve, the stiffening rib plate is of a triangular structure, the stiffening rib plate is arranged on the outer wall of the sleeve in a circumferential array mode and extends to the counterweight bearing plate, so that an inverted trapezoidal structure is formed among the sleeve, the stiffening rib plate and the counterweight bearing plate, the diameter of the sleeve is larger than that of a tubular pile, and the load platform is sleeved at the top of the tubular pile through the sleeve; the counterweight group includes a heavy balancing weight and at least one light-duty balancing weight, the weight of heavy balancing weight is greater than the weight of light-duty balancing weight, stack on the counter weight carrier plate from up in proper order down heavy balancing weight and light-duty balancing weight, it includes dead lever, location line and the scale that sinks to survey the setting element, the scale that sinks is established on the tubular pile, and two dead levers are fixed subaerial respectively, the location line is through two dead lever levels fixed and tubular pile looks next-door neighbour's setting, and is located the position range of the scale that sinks.
2. The tubular pile compression test device of claim 1, characterized in that: the diameter of the sleeve is 40-60 mm larger than that of the tubular pile, and the length of the sleeve is twice of that of the tubular pile; the counterweight bearing plate is of a square structure, and the side length is 3 times of the diameter of the tubular pile; the stiffening rib plates are arranged at intervals of 45 degrees.
3. The tubular pile compression test device of claim 1, characterized in that: and the four corner positions of the counterweight bearing plate are symmetrically provided with hanging rings.
4. The tubular pile compression test device of claim 1, characterized in that: the heavy balancing weight is a concrete precast block, a hole is formed in the top of the heavy balancing weight, and a hanging ring is arranged in the hole.
5. The tubular pile compression test device of claim 1, characterized in that: the light-duty balancing weight is the steel sheet, size, weight are inequality between the light-duty balancing weight, the left and right sides of light-duty balancing weight is symmetry respectively and is equipped with rings.
6. The tubular pile compression test device of claim 1, characterized in that: the observation positioning piece further comprises a level gauge, and the level gauge is used for reading a numerical value of the positioning line corresponding to the sinking staff.
7. A method for testing the compression resistance of a tubular pile by using the device of any one of claims 1 to 6, which comprises the following steps:
1) manually binding a load platform on the crane, and hoisting the load platform above the tubular pile after trial hoisting by the crane;
2) arranging herringbone ladders on the periphery of the tubular pile, manually standing on the herringbone ladders to support and guide the load platform sleeve to be inserted into the top of the tubular pile, removing the binding between the crane and the load platform, and finishing the installation of the load platform;
3) determining the weight of the heavy-duty balancing weight and the size, the weight and the number of the light-duty balancing weights according to the maximum bearing capacity of the tubular pile;
4) pile up heavy balancing weight on the counter weight carrier plate of load platform earlier through the hoist, then pile one or more light-duty balancing weight on heavy balancing weight, pile the in-process at every turn, observe and take notes the settlement of tubular pile through observing the setting element, judge whether qualified tubular pile.
8. The tubular pile compression test method of claim 7, characterized in that: and 4) in each stacking process, observing whether the tubular pile has an overturning fracture phenomenon or not, and whether the counterweight block has an unstable stacking phenomenon or not, if so, stopping stacking the counterweight block, and withdrawing personnel or taking emergency measures.
9. The tubular pile compression test method of claim 7, characterized in that: in the step 4), in each stacking process, if the sinking amount of the tubular pile exceeds 30mm, stopping stacking, determining that the tubular pile is unqualified, and after stacking to a designed value, stopping stacking, and if the tubular pile does not sink for at least 10 minutes and the accumulated sinking amount is less than 30mm, determining that the tubular pile is qualified.
10. The tubular pile compression test method of claim 7, characterized in that: and the method also comprises the step 5), after the test is finished, reversely removing the balancing weight and the load platform, transferring the balancing weight and the load platform to the next tubular pile, and performing a circulation test.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110258653.XA CN112878396A (en) | 2021-03-10 | 2021-03-10 | Tubular pile compression test device and test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110258653.XA CN112878396A (en) | 2021-03-10 | 2021-03-10 | Tubular pile compression test device and test method |
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| Publication Number | Publication Date |
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| CN112878396A true CN112878396A (en) | 2021-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110258653.XA Pending CN112878396A (en) | 2021-03-10 | 2021-03-10 | Tubular pile compression test device and test method |
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| CN (1) | CN112878396A (en) |
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2021
- 2021-03-10 CN CN202110258653.XA patent/CN112878396A/en active Pending
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