Method for controlling cumulative settlement of pile-supported subgrade strengthening pile

A technology for reinforcing piles and control piles, which is applied in the direction of roads, roads, infrastructure engineering, etc., and can solve problems such as running comfort and safety.

Active Publication Date: 2015-05-20
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to control the cumulative settlement of reinforcement piles under the long-term cyclic load of pile-supported subgrade trains and solve the problems of comfort and safety in the operation of pile-supported subgrade trains, the purpose of the present invention is to provide a method for controlling the cumulative settlement of pile-supported subgrade reinforcement piles method, applied to the design of pile-supported subgrade

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  • Method for controlling cumulative settlement of pile-supported subgrade strengthening pile
  • Method for controlling cumulative settlement of pile-supported subgrade strengthening pile
  • Method for controlling cumulative settlement of pile-supported subgrade strengthening pile

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Embodiment Construction

[0046] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0047] The inventive method such as figure 1 As shown, 1 is the roadbed, 2 is the rigid pile, 3 is the pile cap, and 4 is the soil arch; the pile cap 3 is installed on the top of each rigid pile 2, the roadbed 1 is laid on the pile cap 3, and the interior of the roadbed 1 above the pile cap 3 Form soil arch 4.

[0048] The concrete process of the embodiment of the present invention is:

[0049]The cyclic load ratio CLR of the present invention and the static load ratio SLR satisfy the basis principle as follows:

[0050] figure 2 These are three typical cumulative settlement development modes of rigid piles under cyclic loading, which are divided into Type I, Type II and Type III. Type I cumulative settlement development mode is the most stable and most conducive to controlling the cumulative settlement of pile-supported subgrades. ;

[0051] Tabl...

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Abstract

The invention discloses a method for controlling the cumulative settlement of a pile-supported subgrade strengthening pile. The method comprises the following steps: calculating a dynamic stress attenuating to the upside of a soil arch height by virtue of a Boussinesq's Equation; calculating according to the dynamic stress, a pile spacing and a share ratio of a load of a pile top to obtain the dynamic load above the pile top; calculating according to the weight of a subgrade filling, an upper load of a subgrade and the share ratio of the load of the pile top to obtain a static load above the pile top; calculating according to an ultimate bearing capacity of a pile tip and the static load above the pile top and the dynamic load above the pile top to obtain a cyclic load ratio and a static load ratio of a single pile above the pile top, namely, a thickness of the subgrade and the bearing capacity of the pile tip accord with a requirement in a case that the cyclic load ratio and the static load ratio of the single pile meet a certain condition so that the control for the cumulative settlement of the pile-supported subgrade strengthening pile is completed.

Description

technical field [0001] The invention relates to a roadbed design method, in particular to a method for controlling the accumulative settlement of reinforced piles of a pile-supported embankment, which controls the uneven settlement and accumulative settlement of the embankment by controlling the accumulative settlement of the reinforced piles. Background technique [0002] Rigid piles are widely used in high-speed railway and highway embankment reinforcement, and have the advantages of high rigidity, small deformation, convenient construction, and easy quality control. This kind of embankment reinforced by piles is called pile-supported embankment. The pile-supported subgrade is subjected to cyclic loads generated by trains during operation. Under cyclic loading, rigid piles are prone to cumulative settlement and changes in bearing capacity. The thickness of subgrade is an important design index in the design of high-speed railway subgrade. At present, the high-speed rail...

Claims

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Application Information

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IPC IPC(8): E01C3/00E02D27/12
CPCE01C3/00E02D27/12
Inventor 陈仁朋汪焱卫陈金苗王瀚霖边学成
Owner ZHEJIANG UNIV
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