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Assembled concrete pile cap and miniature pile combined foundation and construction method

A concrete and prefabricated technology, applied in infrastructure engineering, construction, etc., can solve problems such as difficulty in entering the site for large-scale pile foundation construction equipment, increase in earthwork excavation and support costs, and wet construction sites to achieve bonding The effect of strong force, uniform force and short construction period

Pending Publication Date: 2018-07-10
HUAIHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the foundations of these buildings (structures) mostly use cast-in-place concrete foundations or pile foundations, resulting in wet construction sites, heavy workload, long construction period, environmental damage and noise pollution.
In addition, in order to meet the design and construction requirements of soft soil foundations, the three-dimensional dimensions of cast-in-place concrete foundations or pile foundations are large, which increases the amount of earthwork excavation and support costs. At the same time, in areas with inconvenient road traffic or complex foundation conditions, It is difficult to enter the site for large-scale pile foundation construction equipment, and it is even impossible to implement

Method used

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  • Assembled concrete pile cap and miniature pile combined foundation and construction method
  • Assembled concrete pile cap and miniature pile combined foundation and construction method
  • Assembled concrete pile cap and miniature pile combined foundation and construction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A prefabricated concrete cap and micro-pile joint foundation, which is divided into two parts, the lower part is a micro-grouting steel pipe pile 9, and the upper part is a prefabricated concrete cap, and the cap and the micro-grouting steel pipe pile 9 pass through the pile The steel bars in the body are anchored into the reserved holes 7 of the anchor bolts and then connected by grouting technology.

[0043] The micro-grouting steel pipe pile 9 adopts the pressure grouting process to form a pile, including the steel pipe and the pile structure fixed at the lower end of the steel pipe; the inner center of the steel pipe is arranged with a large-diameter high-strength threaded steel bar, and the threaded steel bar and the post-grouting body have strong adhesion and pull-out resistance The bearing capacity is high, and it is convenient to connect and fix through the nut on the top of the anchor bolt reserved hole 7.

[0044] The pile head of the micro-grouting steel pipe...

Embodiment 2

[0048] A construction method for a combined foundation of a prefabricated concrete cap and micropile, the specific steps are as follows:

[0049] (1) For foundation pit excavation, consider the prestressed tension construction operation space;

[0050] (2) For the construction of miniature steel pipe piles, the piles are connected by continuous welding method, and the steel pipe piles are pressed to the design depth;

[0051] (3) Adjust the elevation of the top of the micro-steel pipe pile, and ensure that the top of the micro-steel pipe pile is at the same elevation by adjusting the top sealing steel plate 10;

[0052](4) Positioning of the prefabricated concrete cap, use the rib insertion method to align and position the reserved hole 7 of the cap anchor bolt with the micro-steel pipe pile head hole; the positioning sequence of the five parts is to first locate the first corner unit (any one ) → Intermediate → Position the remaining three corner monomers in sequence (clockw...

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Abstract

The invention discloses an assembled concrete pile cap and miniature pile combined foundation and a construction method thereof. The assembled concrete pile cap and miniature pile combined foundationis divided into two parts, the lower part is micro grouting steel pipe piles, the upper part is the assembled concrete pile cap, and the pile cap and the micro grouting steel pipe piles are connectedby the adoption of a grouting technology after reinforcing steel bars in pile bodies are anchored into anchor bolt reserved holes. Double-layer bi-directional arrangement of pre-stressed tensioning isadopted in the site, and pre-stressed tension is carried out in two times, so that the assembled concrete pile cap has the beneficial effects of being high in integrity and uniform in stress. The combined foundation is the combination of the upper assembled concrete pile cap and the lower miniature steel pipe pile group and has the beneficial effects that the settlement of the foundation is reduced, the application range is wide, and the construction period is short.

Description

Technical field [0001] The invention relates to a combined foundation suitable for the field of civil engineering, and specifically relates to a combined foundation of prefabricated concrete caps and micro piles suitable for small buildings, transmission line towers, signal towers, and wind turbines in soft soil areas. Background technique [0002] There are a large number of soft soil foundations distributed in China's coastal areas, and most of these areas are economically developed areas with huge engineering construction and development scales, densely distributed buildings, and tower-mast structures such as transmission line towers, signal towers, and wind turbines. At present, the foundations of these buildings (structures) mostly use cast-in-place concrete foundations or pile foundations, resulting in wet construction sites, heavy workloads, long construction periods, and prominent environmental damage and noise pollution problems. In addition, in order to meet the re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D27/12E02D27/14E02D27/42E02D15/04
CPCE02D15/04E02D27/12E02D27/14E02D27/42
Inventor 宗钟凌宋明志李青松武江传张魁朱立位刘钟
Owner HUAIHAI INST OF TECH
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