Dynamic soil pressure research method for finite soil body under vertical dynamic overload
An earth pressure and vertical technology, which is applied in the direction of applying stable tension/pressure to test material strength, preparation of test samples, and measurement devices, can solve problems such as undiscovered dynamic earth pressure, and achieve convenient data analysis and operation methods simple effect
Inactive Publication Date: 2018-12-21
HUNAN INSTITUTE OF SCIENCE AND TECHNOLOGY
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Problems solved by technology
With the rapid development of high-speed railways and expressways, moving trains or cars will produce vertical dynamic overloading on the limited soil behind the wall, but there is no method for the study of dynamic earth pressure of limited soil under vertical dynamic overloading to solve the problem. The influence of vertical dynamic overload on the dynamic earth pressure of the retaining wall under different displacement modes in the project and the determination of the value of the dynamic earth pressure
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[0032] The following is further described in detail through specific implementation methods:
[0033] The reference signs in the drawings of the description include: operating table 1, steel structure model box 2, steel frame 3, cylinder 4, bearing plate 5, concrete panel 6, card slot 7, movable retaining wall 8, shaft wheel 9, second Gear 10, motor 11, power propulsion frame 12, first gear 13, support 14, force frame 15, arc plate 16, fixed retaining wall 17, air compressor 18, oil-water separator 19, air pressure regulating valve 20, Electromagnetic valve 21, electric control box 22, air intake pipe 23, air outlet pipe 24.
[0034] The embodiment is basically as attached figure 1 Shown: The method for the study of dynamic earth pressure of finite soil under vertical dynamic overload, including the following steps:
[0035] 1. Set up a steel structure model box that can provide vertical dynamic overload, and prepare soil samples for model tests;
[0036] Two, the movable r...
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The invention relates to the field of geotechnical engineering research technologies, in particular to a dynamic soil pressure research method for a finite soil body under a vertical dynamic overload.The method comprises the steps that A, a steel structure model box capable of providing the vertical dynamic overload is arranged, and a soil sample needed in a model test is prepared; B, a dynamic soil pressure meter is installed in a hole of a movable stop wall, and the movable stop wall is connected with a power propelling component; C, a fixed stop wall, the movable stop wall and the steel structure model box form a space with one open upper end face; D, the space formed by the fixed stop wall, the movable stop wall and the steel structure model box is filled with the soil sample; E, a vertical dynamic load is generated through a cylinder to act on a concrete face plate; F, a displacement mode of the movable stop wall is realized in cooperation with the power propelling component; andG, the dynamic soil pressure meter tests a dynamic soil pressure value generated by the finite soil body under the action of the vertical dynamic overload. Through the method, the purpose of studyingdynamic soil pressure on the finite soil body behind the movable stop wall in different displacement modes under the action of the vertical dynamic overload is achieved.
Description
technical field [0001] The invention relates to the technical field of geotechnical engineering research, in particular to a method for researching dynamic earth pressure of limited soil under vertical dynamic overload. Background technique [0002] In the design and calculation of engineering structures such as retaining walls, abutments, and foundation pit enclosures, the determination of earth pressure is an essential link. At present, the Coulomb or Rankine earth pressure theory widely used in engineering practice assumes that the soil behind the wall is a semi-infinite body. With the widespread use of underground space, underground structures are becoming more and more dense, and the filling soil before and after the structures is often limited soil, such as the support structure adjacent to the existing basement foundation pit, the slope retaining wall adjacent to the bedrock surface, and the subway station Narrow foundation pit support structure, soil between double ...
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IPC IPC(8): G01N1/28G01N3/12
CPCG01N1/28G01N3/12G01N2203/0019G01N2203/0044
Inventor 刘晓红刘晓平杨恒山胡卫东刘正夫张运陆
Owner HUNAN INSTITUTE OF SCIENCE AND TECHNOLOGY