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CN-224215036-U - Adjustable force transmission column device for deep flat plate load test

CN224215036UCN 224215036 UCN224215036 UCN 224215036UCN-224215036-U

Abstract

The utility model belongs to the technical field of deep flat plate load tests, and particularly relates to an adjustable deep flat plate load test force transmission column device which comprises a bearing platform, wherein a force transmission column assembly is arranged at the bottom of the bearing platform, a bearing plate is arranged at the bottom of the force transmission column assembly, the force transmission column assembly consists of a plurality of groups of short columns, each short column comprises a first hollow rectangular shell and a second hollow rectangular shell, opposite sides of the first hollow rectangular shell and the second hollow rectangular shell are mutually communicated, a first rectangular reinforcing frame is arranged at the bottom of the first hollow rectangular shell, a rectangular chute enabling the first rectangular reinforcing frame to slide is formed in the top of the second hollow rectangular shell, an electric telescopic rod is arranged on the inner wall of the top of the first hollow rectangular shell, and a telescopic end of the electric telescopic rod is connected with the inner wall of the bottom of the second hollow rectangular shell. The device not only can adjust the height, but also can provide excellent axial bearing capacity, bending rigidity and overall stability under the extension state, and ensures the load transmission precision.

Inventors

  • Ji Linming
  • Lin Fanhua
  • HUANG WEIWEI
  • CHEN CONGLIN
  • LIU YANQIANG

Assignees

  • 福建德昇工程检测有限公司

Dates

Publication Date
20260508
Application Date
20250617

Claims (7)

  1. 1. An adjustable deep flat plate load test force transmission column device comprises a bearing platform (1), wherein a force transmission column assembly is arranged at the bottom of the bearing platform (1), and a bearing plate (2) is arranged at the bottom of the force transmission column assembly; The electric telescopic column is characterized in that the force transmission column assembly consists of a plurality of groups of short columns (3), each short column (3) comprises a first hollow rectangular shell (4) and a second hollow rectangular shell (5), the opposite sides of the first hollow rectangular shell (4) and the opposite sides of the second hollow rectangular shell (5) are mutually communicated, a first rectangular reinforcing frame (6) is arranged at the bottom of the first hollow rectangular shell (4), a rectangular chute (7) enabling the first rectangular reinforcing frame (6) to slide is formed in the top of the second hollow rectangular shell (5), an electric telescopic rod (8) is arranged on the inner wall of the top of the first hollow rectangular shell (4), the telescopic end of the electric telescopic rod (8) is connected with the inner wall of the bottom of the second hollow rectangular shell (5), and telescopic reinforcing assemblies are arranged on the four side walls of the first hollow rectangular shell (4) and the second hollow rectangular shell (5).
  2. 2. The adjustable deep flat panel load test force transmission column device according to claim 1, wherein the length and the width of the first hollow rectangular shell (4) and the second hollow rectangular shell (5) are the same.
  3. 3. The adjustable deep flat panel load test force transmission column device according to claim 1, wherein the first rectangular reinforcing frame (6) is matched with the rectangular sliding groove (7).
  4. 4. The adjustable deep flat panel load test force transmission column device according to claim 1, wherein the first rectangular reinforcing frame (6), the first hollow rectangular shell (4) and the second hollow rectangular shell (5) are provided with anti-corrosion layers.
  5. 5. The adjustable deep flat load test force transmission column device according to claim 1, wherein the telescopic reinforcing component comprises four reinforcing plates (9), each two reinforcing plates (9) are hinged, the four reinforcing plates (9) form a reinforcing rectangular frame, and the hinged positions of the two reinforcing plates (9) are respectively connected with the side walls of the first hollow rectangular shell (4) and the second hollow rectangular shell (5).
  6. 6. The adjustable deep flat load test force transmission column device according to claim 5, wherein a reinforcing telescopic rod (10) is arranged between the side walls of each two reinforcing plates (9).
  7. 7. An adjustable deep plate load test force transmission column device according to claim 1, characterized in that every two short columns (3) are connected through bolts.

Description

Adjustable force transmission column device for deep flat plate load test Technical Field The utility model belongs to the technical field of deep flat plate load tests, and particularly relates to an adjustable force transmission column device for a deep flat plate load test. Background The deep flat plate load test occupies a significant position in the geotechnical engineering field, and is a core in-situ test method for accurately measuring key mechanical properties such as bearing capacity, deformation characteristics and the like of foundation soil at a deep position. In various large-scale infrastructure construction, such as projects of high-rise buildings, cross-sea bridges, underground rail transit and the like, accurate acquisition of mechanical parameters of deep foundation soil is a foundation stone for ensuring safety and stability of engineering structures. In a traditional deep flat plate load test system, a force transmission column device is used as a core hinge for connecting a bearing platform and a bearing plate, and is used for carrying the heavy duty of accurately transmitting the load applied by the upper part to deep foundation soil. However, with the continuous deep and increasing technical requirements of geotechnical engineering practice, the traditional force transmission column device gradually exposes a series of technical bottlenecks to be solved, and the problems severely restrict the precision, the efficiency and the wide applicability of the device of the deep flat plate load test. Firstly, the highly fixed nature of conventional force transfer column devices greatly limits their flexibility of application under different geological conditions. In an actual engineering scene, geological conditions of various places are complex and changeable, and the layered structure, the burial depth and the test depth required by engineering of foundation soil are obviously different. For some projects requiring mechanical property test of deep foundation soil, a force transmission column device with a fixed height often falls into the dilemma due to the fact that the corresponding depth requirement cannot be met. This not only results in a significant amount of time and cost being required to re-customize or build the adapted force transfer system before the test, but also inevitably introduces a new error source due to the difficulty in ensuring the consistency with the original design for each change of the force transfer system, which greatly discounts the accuracy of the test results and further affects the reliability and safety of the engineering design. Secondly, stability and rigidity problems of the traditional force transmission column device in the load transmission process become key factors influencing test accuracy. The deep flat plate load test is usually carried out at a certain depth underground, and when the force transmission column transmits a larger load, the force transmission column not only bears self gravity, but also can bear complex lateral pressure and friction force of surrounding soil. The traditional force transmission column device is difficult to effectively cope with the comprehensive influence of the complex forces due to the limitation of structural design. In the test process, the force transmission column is easy to generate non-negligible lateral deformation, bending and even integral instability, which directly leads to the deviation of a load transmission path, so that the finally measured foundation soil mechanical parameter has larger error with the actual condition. Such errors may mislead the engineer's judgment of the bearing capacity and deformation characteristics of the foundation, give serious potential safety hazards to engineering design and construction burial, and may even cause catastrophic engineering accidents. Furthermore, the problem of recycling the conventional force transfer column device after the test is completed becomes a great difficulty in engineering practice. Because of the lack of an effective contraction mechanism in its structural design, the force transfer column faces a number of difficulties in extraction from the hole after testing. Especially for the test field with larger burial depth, the whole height of the force transmission column is larger and is difficult to effectively disassemble or contract, so that the extraction process is time-consuming and labor-consuming, the device is damaged possibly due to improper operation, and even the soil structure around the test hole is damaged, so that the follow-up use of the field and the development of other test works are affected. Therefore, we provide an adjustable deep flat load test force transmission column device which not only can adjust the height, but also can provide excellent axial bearing capacity, bending rigidity and integral stability in an elongation state, and ensures load transmission precision. Disclosure of utility model The utility model aims