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Method for quickly detecting bearing capacity of natural foundation of low-filling shallow-digging roadbed

A technology of natural foundation and bearing capacity, which is applied in infrastructure engineering, on-site foundation soil survey, construction, etc. It can solve the problems of natural foundations without test vehicles, etc., and achieve the effect of simple testing and easy operation

Inactive Publication Date: 2017-02-01
CHANGAN UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Although the on-site bearing plate method and the Beckman beam method can theoretically measure the resilience modulus of natural foundations, there are various difficulties in practice, such as the natural foundation does not have the conditions for the test vehicle to drive, so the test of natural foundations The method has special requirements

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  • Method for quickly detecting bearing capacity of natural foundation of low-filling shallow-digging roadbed
  • Method for quickly detecting bearing capacity of natural foundation of low-filling shallow-digging roadbed
  • Method for quickly detecting bearing capacity of natural foundation of low-filling shallow-digging roadbed

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Embodiment Construction

[0036] The present invention is described in further detail below in conjunction with accompanying drawing:

[0037] The present invention adopts the power cone to quickly detect the bearing capacity of the natural foundation of the low-fill and shallow excavation subgrade, such as Picture 1-1 and Figure 1-2 As shown, the power cone includes a guide rod 3, a drop hammer 2 is installed on the top of the guide rod 3, a cone head 9 is installed at the bottom, and a handrail 5 is arranged in the middle; a handle 1 is installed on the upper end of the drop hammer 2. The handrail 5 is connected with the guide rod 3 by the coupling 4, and is fastened by the tightening ring 6. A scale 8 is arranged parallel to the side of the guide rod 3, and the range of the scale 8 is 1 m.

[0038] The method for quickly detecting the bearing capacity of the natural foundation of low-fill and shallow-excavation roadbed of the present invention comprises the following steps:

[0039] 1), accordin...

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Abstract

The invention discloses a method for quickly detecting the bearing capacity of a natural foundation of a low-filling shallow-digging roadbed. The method comprises the following steps that (1) the bearing capacity of the low-filling shallow-digging roadbed is analyzed; (2) the advantages, the disadvantages and the applicability of an existing roadbed resilient modulus determining method and the characteristics of a DCP method are presented; (3) the DCP method is introduced and testing procedures are conducted; and (4) the applicability of the DCP method for quickly detecting the bearing capacity of the low-filling shallow-digging natural foundation is verified. According to the method for quickly detecting the bearing capacity of the natural foundation of the low-filling shallow-digging roadbed, testing data are reliable, the operation and detection methods are easy, site limitation is avoided, the applicability is wide, and the method is more suitable for the detection of the natural foundation than other detection methods; and the penetration Dd detected by the DCP method has a good correlation relationship with the resilient modulus E0 and the CBR, and the method can conduct quick detection for the low-filling shallow-digging roadbed and has good promotion value.

Description

[0001] 【Technical field】 [0002] The invention belongs to the field of on-site testing of highway subgrade and pavement, and in particular relates to a method for quickly detecting the bearing capacity of natural subgrade of low-fill and shallow-cut subgrade. [0003] 【Background technique】 [0004] The subgrade is the foundation of the entire road structure. The quality of the subgrade directly affects the quality of the entire road structure. The subgrade supports the pavement structure, and its anti-deformation ability plays a decisive role in the strength, stiffness and stability of the pavement structure. . Once there is a quality problem in the roadbed, it will cause serious damage to the road, so the construction quality of the roadbed must be ensured. [0005] For low-fill subgrades, the natural foundation is within the depth of influence of the deflection test, and the deflection of the top surface of the subgrade is greatly affected by the characteristics of the nat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D1/02
CPCE02D1/022
Inventor 姚爱玲孙治军张久鹏刘洋王军王亚奇何志勇王育博王天宇郝润姝黄乔森
Owner CHANGAN UNIV
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