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A Construction Method of Rigid Pile Composite Foundation by Upside-Down Method

A composite foundation and construction method technology, which is applied in infrastructure engineering, roads, roads, etc., can solve the problems of great impact on construction period and cost, difficult to guarantee effect, long construction period, etc., so as to control post-construction settlement and reduce material consumption. , the effect of shortening the construction period

Inactive Publication Date: 2017-06-13
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Abstract
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Problems solved by technology

In order to control post-construction settlement, strict requirements are imposed on the materials for embankment filling and the compactness of rolling, which makes the construction period longer and the cost higher; Some special treatment methods are required, which have a great impact on the construction period and cost, and the effect is difficult to guarantee

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  • A Construction Method of Rigid Pile Composite Foundation by Upside-Down Method
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Embodiment Construction

[0035] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0036] refer to Figure 1~Figure 2 Shown, the reverse method rigid pile composite foundation construction method of the present invention comprises the following construction steps:

[0037] 1) Subgrade 3 treatment at the bottom of the entire composite foundation:

[0038] ① Site cleaning: Level the ground of the subgrade, and use a road roller to roll before filling, so that the compactness of the subgrade 3 reaches 90%;

[0039] ②Install settlement plates every 30m on the top surface of the middle line of subgrade 3, and conduct subgrade settlement monitoring;

[0040] 2) After the subgrade 3 is leveled, the embankment 2 is filled on its upper part:

[0041] ① Select plain soil as the filling material of embankment 2, and the compaction degree of embankment 2 reaches 92%;

[0042] ②Fill plain soil in layers and carry out compaction test. Accordi...

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Abstract

The invention discloses a top-down rigid pile compound foundation construction method which comprises the following construction procedures: performing roadbed treatment at the bottom of a whole compound foundation, performing embankment filling at the upper part of a roadbed after the roadbed is flattened, performing rigid pile construction after embankment filling is finished, and finally constructing a structural layer at the uppermost layer above an embankment to form a structural layer-rigid pile-embankment-roadbed common action system. By virtue of top-down construction, the aims of lowering the manufacturing cost, shortening the working period and controlling the settlement are fulfilled by changing the construction sequence of the rigid pile compound foundation in a road project and fully using the compaction action of the embankment on a soft roadbed, the extrusion action of the rigid pile and a dynamic rigid pile driving process on the embankment and the jacking and hooping action of a working process on the embankment according to stress characteristics of the roadbed and the rigid pile; the construction is easy and convenient, and the controllability is high; the top-down rigid pile compound foundation construction method is suitable for general soft roadbed treatment, and is particularly suitable for road-bridge transitional section treatment of a road.

Description

technical field [0001] The invention relates to the field of civil engineering foundations, in particular to a construction method of a rigid pile composite foundation by an upside-down method. Background technique [0002] A large number of high-grade highways are built in soft soil areas in my country every year, most of which require foundation treatment. The traditional foundation treatment method is to construct piles first, and then carry out embankment filling. In order to control post-construction settlement, strict requirements are imposed on the materials for embankment filling and the compactness of rolling, which makes the construction period longer and the cost higher; Some special treatment methods are required, which have a great impact on the construction period and cost, and the effect is difficult to guarantee. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide an upside-down rigid pile composite ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01C3/00E01C3/04E02D27/12
Inventor 黄生根吴文兵蒋超徐学连
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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