CN114855892B - Load pressurizing device for static load experiment of test pile - Google Patents
Load pressurizing device for static load experiment of test pile Download PDFInfo
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- CN114855892B CN114855892B CN202210594416.5A CN202210594416A CN114855892B CN 114855892 B CN114855892 B CN 114855892B CN 202210594416 A CN202210594416 A CN 202210594416A CN 114855892 B CN114855892 B CN 114855892B
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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 load pressurizing device for a static load experiment of a test pile, which comprises the test pile buried in the upper end of the ground and a pressure sensor arranged at the upper end of the test pile, wherein a hydraulic cylinder is arranged right above the pressure sensor, a support frame is supported at the upper end of a telescopic hydraulic rod in the hydraulic cylinder, the support frame comprises a top beam fixedly arranged at the top end of the hydraulic rod and a bottom beam which is fixed with the ground through a plurality of ground anchors and has an I-shaped structure, two ends of the upper surface of the bottom beam are provided with detachable vertical supports, the movable pulley is arranged above the bottom beam through the structure of pulley blocks and the structural characteristics of sliding groups, the fixed pulley is arranged below the fixed pulley, the number of strands is increased through the number of strands of steel wire ropes, the lifting acting force of the hydraulic cylinder is unchanged, the number of required cement blocks is reduced, and the number of the cement blocks is greatly reduced.
Description
Technical Field
The invention relates to the field of test pile compression resistance experiments, in particular to a load pressurizing device for a test pile static load experiment.
Background
The test pile compression test is a technology applied to engineering for detecting pile foundation bearing capacity. In the aspect of determining the ultimate bearing capacity of a single pile, the method is the most accurate and reliable test method, and is used for judging whether a certain dynamic load test method is mature or not, and the comparison error of static load test results is used as the basis. Therefore, each foundation design process specification lists a single pile static load test into the primary position.
When the existing test pile compression test is carried out, a large number of concrete blocks are required to be used for carrying out loading tests through large hoisting equipment, the concrete blocks are hoisted to the upper portion of the test pile one by one, when the load test is required to be carried out on the large test pile, a large number of concrete blocks are required, therefore, the traditional load test mode occupies a large area, wastes time and labor, and meanwhile, when the concrete blocks are placed higher and the foundation is unstable, the concrete blocks are poured, so that the potential safety hazard is large.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the load pressurizing device for the static load experiment of the test pile, the movable pulley is arranged above the test pile through the structure of the pulley block and the structural characteristics of the sliding group, the fixed pulley is arranged below the test pile, the more the number of strands of the test pile is, the lifting acting force of the hydraulic cylinder is unchanged, the fewer the number of required cement blocks is, and the use number of the cement blocks is greatly reduced.
In order to solve the technical problems, the invention provides the following technical scheme: the utility model provides a load pressure device for experimental pile static load experiment, including burying in the naked experimental pile of ground upper end, place the pressure sensor in experimental pile upper end, be provided with hydraulic cylinder directly over the pressure sensor, the inside flexible hydraulic stem upper end of hydraulic cylinder supports has the support frame, the support frame is including the back timber with hydraulic stem top fixed mounting, the roof beam that is "worker" structure through a plurality of earth anchor fixed with ground, detachable vertical support is installed at roof beam upper surface both ends, the at least two sets of assembly pulleys of articulates between roof beam and the back timber, the assembly pulley is including the movable pulley with the back timber articulates, the fixed pulley with the roof beam articulates, one end and movable pulley frame fixed mounting's wire rope, wire rope twines fixed pulley and movable pulley in proper order, and the other end runs through vertical support and articulates has detachable carrier.
As a preferable technical scheme of the invention, the bottom beam is two-section, a steel ring with an axis along the plumb line direction is welded in the middle, the hydraulic cylinder is arranged right above the steel ring, detachable reinforcing ribs are arranged between the bottom beam and the vertical supports, the two vertical supports are rotatably connected with guide wheels through shaft rods, and a steel wire rope passes through the upper parts of the guide wheels and is in an inverted V-shaped structure.
As a preferable technical scheme of the invention, guide plates matched with the vertical supports in a plugging manner are welded at the bottoms of the two ends of the top beam.
As a preferable technical scheme of the invention, a plurality of hanging holes are formed in the bottom of the top beam along the directions of the two guide wheels, at least two locking rings are arranged in the hanging holes, and the movable pulleys are connected with the locking rings in a hanging mode through hooks at the tops of the movable pulleys.
As a preferable technical scheme of the invention, hanging rings which are the same as the hanging holes in number and correspond to the hanging rings are welded on the upper surface of the bottom beam, and hooks arranged at the bottom of the fixed pulley are connected with the hanging rings in a hanging mode.
As a preferable technical scheme of the invention, the object carrier comprises two sections of longitudinal I-steel and transverse I-steel fixedly installed with the longitudinal I-steel through steel plates and a plurality of bolt nuts, and a circular ring fixedly installed on the upper surface of the steel plate at the joint of the longitudinal I-steel and the transverse I-steel and connected with a hook.
As a preferable technical scheme of the invention, the bottom beam and the vertical support, the reinforcing ribs and the bottom beam and the vertical support are fixedly arranged through steel plates and bolts and nuts.
Compared with the prior art, the invention has the following beneficial effects:
1. Through the structure of assembly pulley and the structural feature of landing group for the movable pulley is arranged in the top, and the fixed pulley is arranged in the below, through wire rope's stock number, the more the stock number, hydraulic cylinder promotes the effort unchanged, and the less the quantity of cement piece that needs, and then great reduction cement piece's use quantity.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic view of the structure of the support frame, hydraulic cylinder and carrier of the present invention;
FIG. 3 is an exploded view of the support frame of the present invention;
FIG. 4 is a schematic view of the structure of the carrier of the present invention;
FIG. 5 is a schematic diagram of a pulley block structure according to the present invention;
fig. 6 is a schematic view of the mounting structure of the top beam and hydraulic rod of the present invention.
Wherein:
1. Testing piles;
2. A pressure sensor;
3. A support frame; 31. a bottom beam; 311. hanging rings; 312. reinforcing ribs; 32. a steel ring; 33. a vertical support; 331. a shaft lever; 34. a guide wheel; 35. a top beam; 351. a guide plate; 36. a hanging hole; 361. a locking ring;
4. a hydraulic cylinder; 41. a hydraulic rod;
5. A carrier rack; 51. longitudinal I-steel; 52. transverse I-steel; 53. a steel plate; 54. a circular ring;
6. pulley block; 61. a movable pulley; 62. a fixed pulley; 63. a wire rope; 64. a hook;
7. and (5) an earth anchor.
Detailed Description
In order that the manner in which the above recited features, objects and advantages of the present invention are obtained will become readily apparent, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. Based on the examples in the embodiments, those skilled in the art can obtain other examples without making any inventive effort, which fall within the scope of the invention. The experimental methods in the following examples are conventional methods unless otherwise specified, and materials, reagents, etc. used in the following examples are commercially available unless otherwise specified.
Examples:
As shown in fig. 1-6, the invention provides a load pressurizing device for static load experiment of a test pile, which comprises a test pile 1 buried in the exposed upper end of the ground, a pressure sensor 2 placed at the upper end of the test pile 1, a hydraulic cylinder 4 arranged right above the pressure sensor 2, a support frame 3 supported at the upper end of a telescopic hydraulic rod 41 in the hydraulic cylinder 4, the support frame 3 comprising a top beam 35 fixedly arranged at the top end of the hydraulic rod 41, a bottom beam 31 which is fixedly arranged at the ground and has an 'I' -shaped structure and fixed by a plurality of ground anchors 7, a detachable vertical support 33 arranged at two ends of the upper surface of the bottom beam 31, at least two groups of pulley blocks 6 are hung between the bottom beam 31 and the top beam 35, the pulley blocks 6 comprise a movable pulley 61 hung with the top beam 35, a fixed pulley 62 hung with the bottom beam 31, a steel wire rope 63 with one end fixedly arranged with the movable pulley 61 frame, the steel wire rope 63 is sequentially wound around the fixed pulley 62 and the movable pulley 61, and the other end of the steel wire rope 63 penetrates through the vertical support 33 and is hung with the detachable object frame 5.
Referring to fig. 1 and 3, the test pile 1 is placed under the center of the steel ring 32, the pressure sensor 2 is placed between the test pile 1 and the hydraulic cylinder 4, then a small amount of cement blocks are piled up above two carrier frames 5 and above the bottom beam 31, meanwhile, the bottom beam 31 is fixedly installed with a plurality of ground anchors 7 installed on the ground, the bottom beam 31 is fixedly installed with the ground, then two groups of pulley blocks 6 are used for fixing the bottom beam 31 with the ground, under the action of the steel wire rope 63 and the fixed pulley 62, the carrier frames 5 generate a force for pressing the fixed pulley 62 downwards with the bottom beam 31, when the hydraulic rod 41 is in an upward extending motion, the upward supporting force and the mass of the top beam 35 and the movable pulley 61 are the reverse acting strength of the test pile 1, at the moment, the carrier frames 5, the bottom beam 31, the cement blocks and the fixed pulley 62 are fixed acting forces, and at the moment, the carrier frames 5 are used as the tension of the fixed pulley 62, the more the steel wire rope 63 is connected with the movable pulley 61, the lower the reverse tension of the carrier frames 5 generates the smaller the required cement blocks.
In other embodiments, the bottom beam 31 is a two-section steel ring 32 with an axis along the plumb line direction is welded in the middle, the hydraulic cylinder 4 is arranged right above the steel ring 32, a detachable reinforcing rib 312 is installed between the bottom beam 31 and the vertical supports 33, the two vertical supports 33 are rotatably connected with the guide wheel 34 through the shaft rod 331, and the steel wire rope 63 passes through the upper part of the guide wheel 34 and is in an inverted V-shaped structure.
Referring to fig. 3, the steel ring 32 is disposed above the test pile 1, and is abutted against the upper end of the test pile through the bottom of the hydraulic cylinder 4, so that data analysis of pressure change is realized through the pressure sensor 2, the fixing strength between the vertical support 33 and the bottom beam 31 is improved through the reinforcing rib 312 of the inclined structure, meanwhile, in the process that the steel wire rope 63 is contracted through the guide wheel 34 which is rotationally connected with the vertical support 33, rigid friction between the steel wire rope 63 and the vertical support 33 is prevented, the contraction of the steel wire rope 63 is facilitated, and under the action of the guide wheel 34, the outer end of the steel wire rope 63 is in an inverted-V structure, and a downward pressing acting force is generated.
In other embodiments, the bottoms of the two ends of the top beam 35 are welded with guide plates 351 in plug-in fit with the vertical supports 33, and referring to fig. 3, the guide plates 351 welded on the bottoms of the two ends of the top beam 35 are in sliding fit with the vertical supports 33 up and down, so that the side tipping is prevented when the top beam 35 moves up and down.
In other embodiments, a plurality of hanging holes 36 are formed in the bottom of the top beam 35 along the two guide wheels 34, at least two locking rings 361 are installed in the hanging holes 36, and the movable pulley 61 is hung with the locking rings 361 through hooks 64 on the top.
Through the hanging hole 36 and the locking ring 361, the plurality of locking rings 361 can be connected with the plurality of movable pulleys 61 in a hanging mode, so that the number of winding strands of the steel wire rope 63 is increased, and the movable pulleys 61 can be conveniently disassembled and assembled through the hanging of the hooks 64 at the tops of the movable pulleys 61 and the locking rings 361.
In other embodiments, hanging rings 311 the same as and corresponding to the hanging holes 36 are welded on the upper surface of the bottom beam 31, and the hanging hooks 64 mounted on the bottom of the fixed pulley 62 are hung with the hanging rings 311, so that the hanging of the hanging hooks 64 mounted on the frame of the bottom of the fixed pulley 62 and the hanging rings 311 is convenient for the disassembly and assembly of the fixed pulley 62.
In other embodiments, the carrier 5 comprises a two-section longitudinal i-steel 51 and a transverse i-steel 52 fixedly mounted with the longitudinal i-steel 51 through a steel plate 53 and a plurality of bolts and nuts, and a ring 54 fixedly mounted on the upper surface of the steel plate 53 at the joint of the longitudinal i-steel 51 and the transverse i-steel 52 and connected with a hook 64.
The two longitudinal I-beams 51 and the transverse I-beams 52 are combined through the steel plate 53 and the bolts and nuts, so that the object carrier 5 is convenient to assemble and disassemble, and meanwhile, the hooks 64 at the end parts of the steel wire ropes 63 can be hung with the object carrier 5 through the circular rings 54.
In other embodiments, the bottom beam 31 and the vertical support 33, the reinforcing ribs 312, and the bottom beam 31 and the vertical support 33 are fixedly installed with bolts and nuts through the steel plate 53, so that the whole assembly and disassembly are convenient.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above-described embodiments, and that the above-described embodiments and descriptions are only preferred embodiments of the present invention, and are not intended to limit the invention, and that various changes and modifications may be made therein without departing from the spirit and scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. The utility model provides a load pressure device for experimental stake static load experiment, including burying in the naked experimental stake (1) of ground upper end, place pressure sensor (2) in experimental stake (1) upper end, its characterized in that: the hydraulic oil cylinder (4) is arranged right above the pressure sensor (2), a support frame (3) is supported at the upper end of a telescopic hydraulic rod (41) in the hydraulic oil cylinder (4), the support frame (3) comprises a top beam (35) fixedly mounted at the top end of the hydraulic rod (41) and a bottom beam (31) which is fixed with the ground through a plurality of ground anchors (7) and is in an 'I' -shaped structure, two detachable vertical supports (33) are mounted at the two ends of the upper surface of the bottom beam (31), at least two groups of pulley blocks (6) are hung between the bottom beam (31) and the top beam (35), each pulley block (6) comprises a movable pulley (61) hung with the top beam (35), a fixed pulley (62) hung with the bottom beam (31), a steel wire rope (63) fixedly mounted at one end of the steel wire rope (63) is sequentially wound on the fixed pulley (62) and the movable pulley (61), and a detachable carrying frame (5) is hung at the other end of the steel wire rope penetrates through the vertical supports (33);
The bottom beam (31) is a two-section steel ring (32) with an axis along the plumb line direction is welded in the middle, the hydraulic oil cylinder (4) is arranged right above the steel ring (32), detachable reinforcing ribs (312) are arranged between the bottom beam (31) and the vertical supports (33), the two vertical supports (33) are rotatably connected with guide wheels (34) through shaft rods (331), and the steel wire ropes (63) penetrate through the upper parts of the guide wheels (34) and are of an inverted V-shaped structure;
Guide plates (351) which are in plug-in fit with the vertical supports (33) are welded at the bottoms of the two ends of the top beam (35).
2. A load pressurizing device for static load test of test piles according to claim 1, wherein: the bottom of the top beam (35) is provided with a plurality of hanging holes (36) along the directions of the two guide wheels (34), at least two locking rings (361) are arranged in the hanging holes (36), and the movable pulley (61) is connected with the locking rings (361) in a hanging mode through hooks (64) at the top.
3. A load pressurizing device for static load test of test piles according to claim 1, wherein: hanging rings (311) which are the same as the hanging holes (36) in number and correspond to the hanging holes are welded on the upper surface of the bottom beam (31), and hooks (64) arranged at the bottom of the fixed pulley (62) are hung with the hanging rings (311).
4. A load pressurizing device for static load test of test piles according to claim 1, wherein: the object carrier (5) comprises a two-section type longitudinal I-steel (51) and a transverse I-steel (52) fixedly installed with the longitudinal I-steel (51) through a steel plate (53) and a plurality of bolt nuts, and a circular ring (54) fixedly installed on the upper surface of the steel plate (53) at the joint of the longitudinal I-steel (51) and the transverse I-steel (52) and connected with a hook (64).
5. A load pressurizing device for static load test of test piles according to claim 1, wherein: the bottom beam (31) and the vertical support (33), the reinforcing ribs (312) and the bottom beam (31) and the vertical support (33) are fixedly arranged through the steel plate (53) and the bolts and nuts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210594416.5A CN114855892B (en) | 2022-05-27 | 2022-05-27 | Load pressurizing device for static load experiment of test pile |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210594416.5A CN114855892B (en) | 2022-05-27 | 2022-05-27 | Load pressurizing device for static load experiment of test pile |
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| Publication Number | Publication Date |
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| CN114855892A CN114855892A (en) | 2022-08-05 |
| CN114855892B true CN114855892B (en) | 2024-06-18 |
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| CN202210594416.5A Active CN114855892B (en) | 2022-05-27 | 2022-05-27 | Load pressurizing device for static load experiment of test pile |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20180035427A (en) * | 2016-09-29 | 2018-04-06 | (주)기림지오테크 | Apparatus for pile load test |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101072721B1 (en) * | 2008-09-12 | 2011-10-11 | 김형남 | Apparatus for pile load test |
| CN204456242U (en) * | 2015-01-30 | 2015-07-08 | 湖北省建筑工程质量监督检验测试中心 | Existing building foundation pile static loading test device |
| CN212375919U (en) * | 2020-04-24 | 2021-01-19 | 江苏盐工百信工程技术研究院有限公司 | Static load test device for pile foundation detection |
| CN216405519U (en) * | 2021-11-25 | 2022-04-29 | 中建八局第三建设有限公司 | Load pressurizing equipment for compression test of test pile |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20180035427A (en) * | 2016-09-29 | 2018-04-06 | (주)기림지오테크 | Apparatus for pile load test |
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