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CN-122013826-A - Static load test device and static load test method for water pile foundation

CN122013826ACN 122013826 ACN122013826 ACN 122013826ACN-122013826-A

Abstract

The invention discloses a static load test device and a static load test method for an aquatic pile foundation, which relate to the technical field of pile foundation tests and comprise a first pile holding piece and a second pile holding piece, wherein the first pile holding piece and the second pile holding piece rotate around a central part as an axis, an X-shaped four-point holding structure is formed through the first pile holding piece and the second pile holding piece, stress blocks are arranged on the opposite sides of the tops of the first pile holding piece and the second pile holding piece, a bottom cylinder is fixed at two ends of the bottom of an I-shaped beam, the first pile holding piece or the second pile holding piece is connected with the bottom cylinder through a suspension piece, a locking cylinder is arranged at the bottom of the bottom cylinder through a lifting assembly and is coaxially arranged with the locking cylinder, and the locking cylinder is matched with the first pile holding piece, the second pile holding piece and the stress blocks.

Inventors

  • ZHANG NA
  • ZENG KUN
  • WANG PENG
  • GONG ZHEN

Assignees

  • 山东创诚路桥工程机械有限公司
  • 山东省鲁建建筑工程检测有限公司

Dates

Publication Date
20260512
Application Date
20260414

Claims (10)

  1. 1. The utility model provides a pile foundation static load test device on water, is including I-beam (1) that are located experimental stake top and jack (8) that are located between I-beam (1) and the experimental stake, its characterized in that, the upper end at auxiliary pile (5) is fixed through cohesion mechanism in the both ends of I-beam (1), and cohesion mechanism includes: The pile-holding piece (4) and the pile-holding piece (401) rotate around the central part of the pile-holding piece (4) and the pile-holding piece (401) to form four X-shaped holding surfaces through the pile-holding piece (4) and the pile-holding piece (401), and stress blocks (406) are arranged on opposite sides of the tops of the pile-holding piece (4) and the pile-holding piece (401); The bottom cylinder (2) is fixed at two ends of the bottom of the I-shaped beam (1), and the first pile holding piece (4) or the second pile holding piece (401) is connected with the bottom cylinder (2) through a suspension piece (402); the locking cylinder (3) is arranged at the bottom of the bottom cylinder (2) through the lifting assembly and is coaxially arranged with the locking cylinder (3), and the locking cylinder (3) is matched with the first pile holding component (4), the second pile holding component (401) and the stress block (406); The auxiliary pile (5) is clasped by the relative rotation of the first pile clasping piece (4) and the second pile clasping piece (401), and the first pile clasping piece (4) and the second pile clasping piece (401) are locked by the rising of the locking cylinder (3).
  2. 2. The static load test device for the water pile foundation according to claim 1, wherein the holding surface is in split arrangement and comprises main frames at two sides and a plurality of movable pieces (404) which are positioned in the two main frames and are movably installed along the radial direction through connecting pieces (408); The connector (408) is made of an elastic material.
  3. 3. The static load test device for the water pile foundation according to claim 1, wherein anti-slip teeth (407) which are equidistantly arranged are arranged on opposite sides of the first pile holding member (4) and the second pile holding member (401); the anti-slip teeth (407) are arranged in a wedge shape or a cone shape.
  4. 4. The static load test device for the water pile foundation according to claim 1, wherein a bottom supporting plate (302) integrally formed with the locking cylinder (3) is arranged at the bottom of the locking cylinder, and pin holes (403) are formed in the first pile holding member (4) and the second pile holding member (401); The novel anti-theft lock is characterized in that through holes (303) are formed in the I-shaped beam (1), the bottom barrel (2) and the bottom supporting plate (302), locking pieces (7) are inserted into the pin holes (403), the I-shaped beam (1), the bottom barrel (2), the locking barrel (3) and the through holes (303), and the locking pieces (7) are arranged in a U shape.
  5. 5. The static load test device for the water pile foundation according to claim 1, wherein the lifting assembly comprises a plurality of pull rods (9) penetrating through the I-beam (1) and the bottom cylinder (2) and rotationally connected with the I-beam (1) and the bottom cylinder (2), and screw holes (301) in threaded fit with the pull rods (9) are formed in the locking cylinder (3).
  6. 6. The static load test device for the water pile foundation according to claim 1, wherein a trigger piece (6) is detachably and slidably arranged on the I-beam (1) and the bottom barrel (2), and the trigger piece (6) is matched with a first pile holding piece (4) and a second pile holding piece (401); the distance between the two sides of the upper part of the first pile holding component (4) and the second pile holding component (401) is smaller than the distance between the two sides of the lower part; The trigger piece (6) comprises an I-shaped plate, and four pressing plates are fixed at the bottom of the I-shaped plate.
  7. 7. The static load test device for the water pile foundation according to claim 6, wherein notches (102) are formed at two ends of the top of the I-beam (1).
  8. 8. The static load test device for the water pile foundation according to claim 2, wherein the stress block (406) is arranged in an isosceles trapezoid shape, and the narrow surface of the stress block faces the center of the auxiliary pile (5).
  9. 9. The static load test device for the water pile foundation according to claim 6, wherein the difference between the distance between the two sides of the top of the first pile holding member (4) and the second pile holding member (401) and the distance between the two sides of the bottom is 2cm.
  10. 10. A method for testing the static load of a water pile foundation, which adopts the device for testing the static load of the water pile foundation according to any one of claims 1 to 9, and is characterized by comprising the following steps: Step one, lifting an I-shaped beam (1) through a lifting device in combination with a steel cable, enabling a jack (8) to be aligned with a test pile, enabling a bottom cylinder (2) to be aligned with auxiliary piles (5) on two sides of the test pile, enabling the I-shaped beam (1) to fall to the top of the test pile when the jack (8) is abutted with the top of the test pile, enabling the bottom cylinder (2) to be abutted with the top of the auxiliary pile (5), and enabling a pile holding piece (4) and a pile holding piece (401) to be opened under the action of gravity and sleeved outside the test pile; Step two, driving the first pile holding component (4) and the second pile holding component (401) to rotate relatively through external force or a trigger component (6) so as to form four holding surfaces for the test pile; Step three, driving the locking cylinder (3) to ascend through the lifting assembly, and implementing radial constraint on the first pile holding member (4) and the second pile holding member (401) to realize self-locking, and inserting the locking member (7) to further strengthen, so as to ensure that the first pile holding member (4) and the second pile holding member (401) are kept in a tightly held state; Applying axial pressure to the top of the test pile through a jack (8), transmitting a reaction force to the auxiliary pile (5) through the I-beam (1), and detecting the sinking condition of the test pile through detection equipment; And fifthly, after the test is finished, loosening the first pile holding piece (4) and the second pile holding piece (401), and removing the I-beam (1) by the lifting equipment.

Description

Static load test device and static load test method for water pile foundation Technical Field The invention relates to the technical field related to pile foundation tests, in particular to a static load test device and a static load test method for an overwater pile foundation. Background In marine and wading projects such as offshore wind power, water photovoltaic, cross-sea bridges and the like, pile foundations are core bearing members for guaranteeing structural safety, and the bearing capacity of the pile foundations is required to be accurately verified through static load tests, so that the pile foundations are key links for evaluating the performance of the pile foundations and guaranteeing the engineering quality. The pile foundation static load test on water relies on auxiliary pile to provide counter force, holds stake locking device as the core component of connection test device and auxiliary pile, and its reliability, suitability and security directly determine test accuracy and operating efficiency. The existing pile foundation static load test pile holding locking device has the technical defects that the complex water working condition requirement is difficult to meet, the existing technology represented by a water single pile vertical compression static load test device with an authorized bulletin number of CN217651869U and similar devices all have the following outstanding problems that the existing device adopts a two-point holding or single locking structure, and the design of grading constraint is lacking. The device adopts simple and easy support and backing plate cooperation, does not have special pile-holding locking mechanism, when experimental heavy load of applying, easily appears holding the stake piece and open, slide relatively with auxiliary pile, leads to the counter-force transmission unstable, test data distortion. Disclosure of Invention Aiming at the defects of the prior art, the invention provides a static load test device and a static load test method for an overwater pile foundation, which solve the problems that pile holding pieces are easy to open and slide relative to auxiliary piles when heavy load is applied in a test. The invention aims at realizing the purposes by adopting the following technical scheme that the static load test device for the water pile foundation comprises an I-beam positioned above a test pile and a jack positioned between the I-beam and the test pile, wherein two ends of the I-beam are fixed at the upper end of an auxiliary pile through a cohesion mechanism, and the cohesion mechanism comprises: The pile-holding piece and the pile-holding piece rotate around the central part as a shaft, and form four X-shaped holding surfaces through the pile-holding piece and the pile-holding piece; the bottom cylinder is fixed at two ends of the bottom of the I-beam, and the first pile holding piece or the second pile holding piece is connected with the bottom cylinder through a suspension piece; The locking cylinder is arranged at the bottom of the bottom cylinder through the lifting assembly and is coaxially arranged with the locking cylinder, and the locking cylinder is matched with the first pile holding piece, the second pile holding piece and the stress block; The auxiliary pile is clasped by the relative rotation of the first pile clasping piece and the second pile clasping piece, and the first pile clasping piece and the second pile clasping piece are locked by the rising of the locking cylinder. Further, the enclasping surface is in split arrangement and comprises main frames at two sides and a plurality of movable pieces which are positioned in the two main frames and are movably installed along the radial direction through connecting pieces; The connecting piece is made of elastic materials. Further, anti-slip teeth which are equidistantly arranged are arranged on the opposite sides of the first pile holding piece and the second pile holding piece; the anti-slip teeth are arranged in a wedge shape or a cone shape. Further, a bottom supporting plate integrally formed with the locking cylinder is arranged at the bottom of the locking cylinder, and pin holes are formed in the first pile holding piece and the second pile holding piece; the I-beam, the bottom cylinder and the bottom supporting plate are respectively provided with a through hole, and locking pieces are inserted into the pin holes, the I-beam, the bottom cylinder, the locking cylinder and the through holes and are arranged in a U shape. Further, the lifting assembly comprises a plurality of pull rods penetrating through the I-beam and the bottom cylinder and rotationally connected with the I-beam and the bottom cylinder, and screw holes matched with the pull rods in a threaded mode are formed in the locking cylinder. Further, the I-beam and the bottom cylinder are detachably and slidably provided with a trigger piece, and the trigger piece is matched with the first pile holding piece