CN212340829U - Vertical resistance to plucking static load test device of single pile - Google Patents

Abstract

The utility model discloses a single-pile vertical uplift static load test device, which comprises a girder, a test pile and a jack, wherein step cushion blocks are symmetrically arranged on two sides of the test pile, and each step cushion block comprises a high layer section for supporting the girder and a low layer section for placing the jack; the test pile is coaxially sleeved with a fastening device for clamping the test pile, the fastening device comprises a clamping sleeve and a wedge-shaped clamp matched with the clamping sleeve, the wedge-shaped clamp consists of a plurality of wedge-shaped clamping pieces with large ends connected to a top sleeve, the upper end of the clamping sleeve is provided with a lower connecting plate, and the section of the inner wall of the clamping sleeve is trapezoidal; a counter-force structure is arranged on the main beam, the counter-force structure comprises a top plate arranged on the main beam, two vertical plates which are connected with two ends of the top plate and are vertically and downwards arranged on the outer side of the main beam, and two upper connecting plates which are perpendicular to the vertical plates and are respectively and outwards arranged, and the upper connecting plates are connected with the lower connecting plates through a plurality of bolts; the inner side of the vertical plate is connected with a horizontal top sleeve plate, and the top sleeve plate is abutted to the top sleeve.

Description

Vertical resistance to plucking static load test device of single pile

Technical Field

The utility model belongs to an equipment, especially a vertical resistance to plucking static load test device of single pile that foundation engineering is experimental.

Background

The single-pile vertical uplift static load test detection result is an important basis for determining construction quality, an anchor pile method is adopted in the existing single-pile vertical uplift static load test detection method, an anchor cage connected with a test pile in a steel bar welding mode forms a loading counter-force system through an anchor pile providing support counter-force, construction is complex and cost is high, and the detection device has the following two defects:

1. the pretensioned prestressed concrete pipe pile is not provided with exposed steel bars, and a pile head is poured after a steel reinforcement cage is installed, so that the original appearance of the test pile is changed, the test can be carried out only after the concrete strength of the pile head reaches the designed strength (generally 28 days), and the required construction period is long;

2. reinforcing bar tensile strength is not high, easy atress is uneven during the steel reinforcement cage stretch-draw of installation, cause the reinforcing bar fracture, factor of safety is low, easily produce the production accident of hindering the people, anchor reinforcing bar and upper portion anchor cage disalignment, must with reinforcing bar preflex, because the preflex produces the moment of torsion in joint department, this concrete of department has the phenomenon of being crushed in advance in the concrete member test, and the operation is inconvenient, easily cause and detect the failure, this test pile can't detect once more after detecting the failure, and the original appearance of test pile has been changed, influence one process implementation under the pretension method prestressed concrete tubular pile.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem be: the device is used for solving the problems that the safety coefficient is low, the required construction period is long and the operation is inconvenient in the tensile detection of the existing pretensioned prestressed concrete pipe pile, and provides a single-pile vertical uplift static load test device.

The utility model discloses a following technical scheme realizes: a single-pile vertical uplift static load test device comprises a main beam, a test pile and a jack, wherein step cushion blocks are symmetrically arranged on two sides of the test pile, each step cushion block comprises a high-rise section and a low-rise section, the high-rise section is used for supporting the main beam, the low-rise section is used for placing the jack, and the high-rise section is far away from the test pile; the test pile is coaxially sleeved with a fastening device for clamping the test pile, the fastening device comprises a clamping sleeve and a wedge-shaped clamp matched with the clamping sleeve, the section of the inner wall of the clamping sleeve is trapezoidal, the wedge-shaped clamp consists of a plurality of wedge-shaped clamping pieces with large ends connected to a top sleeve, and the upper end of the clamping sleeve is welded with a lower connecting plate; a counter-force structure is placed on the main beam, the counter-force structure comprises a top plate placed on the main beam, two vertical plates which are welded and fixed with two ends of the top plate and vertically and downwards arranged on the outer side of the main beam, and two upper connecting plates which are perpendicular to the vertical plates and respectively outwards arranged, and the upper connecting plates are connected with the lower connecting plates through a plurality of bolts; the inner side of the vertical plate is provided with a sliding groove, a top sleeve plate is clamped in the sliding groove, and the top sleeve plate is abutted to the top sleeve.

Furthermore, a plurality of reinforcing ribs are uniformly welded at the joint included angle between the vertical plate and the upper connecting plate.

Further, a steel base plate is arranged between the jack and the main beam.

Further, a spring is arranged outside the top sleeve.

The utility model has the advantages that: 1. the utility model discloses a set up the clamping device outside the test pile and press from both sides tight test pile, avoided in the prior art pretensioning method prestressed concrete pipe pile not to have the exposed reinforcing bar and need to install the problem that the pile head is poured into after the steel reinforcement cage and lead to the required time limit for a project longer; 2. the utility model discloses set up counter-force structure on the girder, this counter-force structure adopts the roof, two vertical boards and two upper junction plates form to constitute, and the bearing capacity is great compared with the adoption steel bar connection mode among the prior art, and the ductility is less, can utilize it to bear great load, and the loading structure is difficult for taking place destruction, and the loading detection process is safer, need not ligature the reinforced pile head again and pour the concrete, and the construction process is few; 3. the fastening device and the test pile are fastened in a mode of utilizing a wedge-shaped clamp and a clamping sleeve, a spring is sleeved outside the top sleeve, and the fastening device is convenient to loosen after the test is finished; the fastening device and the counter-force structure adopt a bolt connection mode, the top sleeve plate is connected between the two vertical plates in a clamping mode, the dismounting is convenient, and all structures can be repeatedly used. 4. Through setting up the step cushion, can settle girder and jack, provide jack counter-force and girder holding power simultaneously, need not to beat the anchor pile, the structure is simple relatively, the simple operation, and easily the realization, the suitability is high, has reduced the construction degree of difficulty, has practiced thrift test cost.

To sum up, the utility model provides a pair of vertical resistance to plucking static load test device of single pile has solved the problem that the time limit for a project that current resistance to plucking detected existence is longer, can not repeated the detection, has the advantage that dismantlement convenience, simple operation, factor of safety are high, do not influence construction period.

The present invention will be further described with reference to the accompanying drawings and the following detailed description.

Drawings

FIG. 1: the utility model has a schematic structure;

FIG. 2: the structure of the fastening device of the utility model is schematically shown;

FIG. 3: the wedge-shaped clamp of the utility model has a schematic structural diagram;

1-a main beam; 2-test pile; 3-a jack; 4-step cushion blocks; 5-high layer section; 6-low layer section; 7-a clamping sleeve; 8-a wedge clamp; 9-top sleeve; 10-a top plate; 11-vertical plate; 12-an upper connecting plate; 13-a lower connecting plate; 14-top jacket plate; 15-a chute; 16-a spring; 17-reinforcing ribs; 18-steel backing plate.

The specific implementation mode is as follows:

example 1:

referring to fig. 1-3, the single-pile vertical uplift static load test device comprises a main beam 1, a test pile 2 and a jack 3, wherein step cushion blocks 4 are symmetrically arranged on two sides of the test pile 2, each step cushion block 4 comprises a high-rise section 5 for supporting the main beam 1 and a low-rise section 6 for placing the jack 3, and the high-rise section 5 is arranged far away from the test pile 2; coaxial cover is equipped with the fastener that is used for pressing from both sides tight experimental stake 2 on experimental stake 2, fastener include clamp sleeve 7, and with clamp sleeve 7 complex wedge anchor clamps 8, wedge anchor clamps 8 comprise the wedge clamping piece that a plurality of main aspects are connected on top cover 9, dull polish processing is done to wedge clamping piece inner surface. The upper end of the clamping sleeve 7 is welded with a lower connecting plate 13, and the section of the inner wall of the clamping sleeve 7 is trapezoidal; a counter-force structure is arranged on the main beam 1, the counter-force structure comprises a top plate 10 arranged on the main beam, two vertical plates 11 which are welded and fixed with two ends of the top plate and vertically and downwardly arranged on the outer side of the main beam, and two upper connecting plates 12 which are perpendicular to the vertical plates 11 and respectively and outwardly arranged, wherein the upper connecting plates 12 are connected with lower connecting plates 13 through a plurality of bolts; the inner side of the vertical plate 11 is connected with a horizontal top sleeve plate 14, and the top sleeve plate 14 is abutted against the top sleeve 9. The inner side of the vertical plate 11 is provided with a sliding groove 15, and the top sleeve plate 14 is clamped in the sliding groove 15. And a plurality of reinforcing ribs 17 are uniformly welded at the joint included angle between the vertical plate 11 and the upper connecting plate 12.

Example 2:

in the single-pile vertical uplift static load test device in embodiment 1, a steel base plate 18 is arranged between the jack and the main beam. And a spring 16 is arranged outside the top sleeve.

The utility model discloses a set up the clamping device outside the test pile and press from both sides tight test pile, avoided in the prior art pretensioning method prestressed concrete pipe pile not to have the exposed reinforcing bar and need to install the problem that the pile head is poured into after the steel reinforcement cage and lead to the required time limit for a project longer; the utility model discloses set up counter-force structure on the girder, this counter-force structure adopts the roof, two vertical boards and two upper junction plates form to constitute, and the bearing capacity is great compared with adopting the welded steel bar connection mode among the prior art, and the ductility is less, can utilize it to bear great load, and the loading structure is difficult for taking place to destroy, and the loading detection process is safer, need not ligature the reinforced pile head again and pour the concrete, and the construction process is few; the fastening device and the test pile are fastened in a mode of utilizing a wedge-shaped clamp and a clamping sleeve, a spring is sleeved outside the top sleeve, and the fastening device is convenient to loosen after the test is finished; the fastening device and the counter-force structure adopt a bolt connection mode, the top sleeve plate is connected between the two vertical plates in a clamping mode, the dismounting is convenient, and all structures can be repeatedly used. Through setting up the step cushion, can settle girder and jack, provide jack counter-force and girder holding power simultaneously, need not to beat the anchor pile, the structure is simple relatively, the simple operation, and easily the realization, the suitability is high, has reduced the construction degree of difficulty, has practiced thrift test cost.

Although specific embodiments of the present invention have been described, it will be understood by those skilled in the art that the specific embodiments described are illustrative only and are not limiting upon the scope of the invention, and that equivalent modifications and variations can be made by those skilled in the art without departing from the spirit of the invention, which is to be limited only by the claims appended hereto.

Claims (4)

1. The utility model provides a vertical resistance to plucking static test device of single pile, includes girder (1), test stake (2) and jack (3), its characterized in that: step cushion blocks (4) are symmetrically arranged on two sides of the test pile (2), each step cushion block (4) comprises a high-rise section (5) for supporting the main beam (1) and a low-rise section (6) for placing the jack (3), and the high-rise sections (5) are far away from the test pile (2); the test pile (2) is coaxially sleeved with a fastening device used for clamping the test pile (2), the fastening device comprises a clamping sleeve (7) and a wedge-shaped clamp (8) matched with the clamping sleeve (7), the section of the inner wall of the clamping sleeve (7) is trapezoidal, the wedge-shaped clamp (8) consists of a plurality of wedge-shaped clamping pieces with large ends connected to a top sleeve (9), and the upper end of the clamping sleeve (7) is welded with a lower connecting plate (13); the main beam (1) is provided with a counter-force structure, the counter-force structure comprises a top plate (10) arranged on the main beam, two vertical plates (11) which are welded and fixed with two ends of the top plate (10) and vertically and downwards arranged on the outer side of the main beam (1), and two upper connecting plates (12) which are perpendicular to the vertical plates (11) and respectively and outwards arranged, wherein the upper connecting plates (12) are connected with the lower connecting plates (13) through a plurality of bolts; the inner side of the vertical plate (11) is provided with a sliding groove (15), a top sleeve plate (14) is clamped in the sliding groove (15), and the top sleeve plate (14) is abutted to the top sleeve (9).

2. The single-pile vertical uplift static load test device as claimed in claim 1, wherein: and a plurality of reinforcing ribs (17) are uniformly welded at the joint included angle between the vertical plate (11) and the upper connecting plate (12).

3. The single-pile vertical uplift static load test device as claimed in claim 1, wherein: and a steel base plate (18) is arranged between the jack and the main beam.

4. The single-pile vertical uplift static load test device as claimed in claim 1, wherein: and a spring (16) is arranged outside the top sleeve.

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