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Flexible pile cap for composite foundation

A composite foundation and flexible pile technology, applied in sheet pile wall, foundation structure engineering, construction, etc., can solve problems such as uncoordinated deformation, and achieve the effect of increasing bearing capacity, reducing settlement, and convenient installation and layout.

Inactive Publication Date: 2013-05-01
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a flexible pile cap for composite foundation, which is simple in structure, reasonable in design, low in engineering cost, convenient in processing and construction, and good in use effect. The deformation incompatibility between the pile body and the soil between the piles existing in the existing pile-net composite foundation

Method used

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  • Flexible pile cap for composite foundation
  • Flexible pile cap for composite foundation
  • Flexible pile cap for composite foundation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Such as figure 1 , figure 2 and image 3 As shown, the present invention includes a horizontal base 2-1 arranged on the pile top of the reinforcement pile 1, a plurality of oblique stress rods 2-2 arranged above the horizontal base 2-1 along the circumferential direction and arranged on a plurality of said The circular ferrule 2-3 on the oblique force rod 2-2, the plurality of oblique force rods 2-2 are tightly connected as a whole through the circular ferrule 2-3, and the multiple The bottoms of the oblique stress rods 2-2 are all fixed on the horizontal base 2-1, and the plurality of oblique stress rods 2-2 are gradually inclined outward from bottom to top. The number of the plurality of oblique stress rods 2-2 is not less than three. The structures and sizes of the plurality of oblique stress rods 2-2 are the same, and the bottom ends of the plurality of oblique stress rods 2-2 are arranged on the same circle with a diameter of d, and the horizontal base 2-1 is ...

Embodiment 2

[0075] In this embodiment, the difference from Embodiment 1 is: D3=3d, and the included angle α is 35°.

[0076] In this embodiment, the structure, connection relationship and construction process of the remaining parts are the same as those in Embodiment 1.

[0077] After the actual construction is completed, the combined pile cap made in embodiment 1 and the combined pile cap made in embodiment 2 are respectively used on the same treated soft soil; Under the three conditions of the combined pile cap made in Example 1 and the combined pile cap made in Example 2, the force and settlement displacement in the vertical direction at the same position in the mattress layer 4 are monitored respectively , the monitoring results are shown in Table 1:

[0078] Table 1 Statistical table of force and settlement displacement monitoring results in the vertical direction

[0079]

[0080] It can be seen from Table 1 that when the combined pile cap is not laid, the vertical force at the...

Embodiment 3

[0082]Such as Figure 5 and Figure 6 As shown, in this embodiment, the difference from Embodiment 1 is that the horizontal base 2-1 is a circular base, and the circular base includes a circular steel ring composed of steel bars and welded and fixed on the The cross-shaped support frame inside the circular steel pipe, the cross-shaped support frame is composed of steel bar one and steel bar two welded, and the circular steel ring and the cross-shaped support frame are arranged on the same plane; The oblique stress rod 2-2 includes two oblique stress rods 1 whose bottoms are respectively fixed at both ends of the steel bar 1 and two oblique stress rods 2 whose bottoms are respectively fixed at both ends of the steel bar 2. At the same time, the outside of the combined pile cap is not covered with geotextile 5 .

[0083] In this embodiment, the steel bar 1 is integrally processed with the two oblique force-bearing rods 1, and the steel bar 2 is processed and manufactured integ...

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Abstract

The invention discloses a flexible pile cap for a composite foundation. The flexible pile cap comprises a horizontal base, a plurality of inclined stressed rods and circular hoops, wherein the horizontal base is arranged at the top of a reinforcing pile; the inclined stressed rods are arranged above the horizontal base along the peripheral direction; the circular hoops are arranged on the inclined stressed rods; the inclined stressed rods are integrally fastened and connected through the circular hoops; the bottoms of the inclined stressed rods are all fixed on the horizontal base; the inclined stressed rods are gradually outward inclined from bottom to top; the quantity of the inclined stressed rods is not less than 3; the bottoms of the inclined stressed rods are all arranged on a same circle with a diameter d; the horizontal base is arranged right above the top of the reinforcing pile; and the horizontal base, the inclined stressed rods and the circular hoops form a combined pile cap. The flexible pile cap for the composite foundation has the advantages of simple structure, reasonable design, low construction cost, convenience in processing, manufacturing and constructing, good use effect and capability of effectively solving the deformation and discordance problems of a pile part and an inter-pile soil part of the present pile net composite foundation.

Description

technical field [0001] The invention relates to a pile cap, in particular to a flexible pile cap for a composite foundation. Background technique [0002] For soft soil foundations, the characteristics of deformation under long-term loads such as buildings and embankments are uneven vertical deformation, long deformation stability time, and prominent post-construction settlement. How to control the stability and deformation of the soft soil foundation is the main concern of the engineering field. Improper handling of the soft soil foundation will affect and harm the use of the superstructure. In order to improve the bearing capacity of the soft soil foundation and reduce the post-construction settlement, the soft soil foundation must be reinforced. Among them, the pile-net composite foundation is a commonly used soft soil foundation reinforcement treatment method. Pile-net composite foundation, also known as reinforced cushion pile-supported subgrade, in actual constructio...

Claims

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Application Information

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IPC IPC(8): E02D5/22
Inventor 李晓军王晓华李来宾陈文夫唐亦川
Owner XIAN UNIV OF SCI & TECH
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