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Method for treating large-scale storage tank liquefaction sand foundation

A technology for sandy soil foundation and large storage tanks, which is applied in the field of liquefied sandy soil foundations for large storage tanks, and can solve problems such as no records of similar situations

Inactive Publication Date: 2011-01-19
XIAN CHANGQING TECH ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For construction on liquefied sand sites 10×10 4 m 3 Floating roof storage tanks, the existing "Building Foundation Treatment Technical Specifications" JGJ79-2002 / J220-2002 and "Petrochemical Enterprise Steel Storage Tank Foundation and Foundation Design Specification SH3068-95" have no ready-made treatment methods, and there are no similar related documents Situation record

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1: the method for this processing large-scale storage tank liquefied sand foundation, is to carry out as follows:

[0015] (1) First, use the water shaking method and vibration method to treat the upper sand layer of the site to make it compact and eliminate liquefaction;

[0016] According to the characteristics of the sandy soil of the site, the large area of ​​the site, and the large thickness of the treatment, combined with the water shaking method: that is, use a sandy soil cushion layer with a thickness of 30cm, and the optimum water content of the site is required to be saturated. water seepage) and shake and tamp with a steel fork. This water shaking method is suitable for large-area sand cushions. The distribution range is approximately a hemisphere.) Each has its own advantages in dealing with the upper loose sand layer.

[0017] a. First, excavate the 3-4m upper sand layer that needs to be treated 2m down, and use a 20t vibratory roller to vibrate...

Embodiment 2

[0026] Except that the laying thickness of each layer of the sand backfill in the first step is 25cm, other data and steps are the same as in Example 1, and the treated sand foundation meets the engineering requirements.

Embodiment 3

[0028] Except that the laying thickness of each layer of the sand backfill in the first step is 35cm, other data and steps are the same as in Example 1, and the treated sand foundation meets the engineering requirements.

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PUM

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Abstract

The invention relates to the field of civil engineering construction foundations, in particular to a method for treating a large-scale storage tank liquefaction sand foundation. The method is characterized by comprising the following steps: (1) firstly, utilizing a water shaking method and a vibration method to treat an upper sand layer of a field so as to ensure that the upper sand layer is densified to eliminate liquefaction; (2) using a CFG pile to provide reliable side friction so as to achieve the aim of improving a bearing capacity characteristic value; and (3) adjusting the uniformity of the foundation by using a lime marl rigid cushion. The large-scale storage tank liquefaction sand foundation treated by the method meets the requirements of the limit values of foundation settlement and uneven settlement, improves the safety of the storage tank so as to guarantee the normal operation of the whole engineering, reduces the engineering manufacturing cost, sufficiently exerts the advantages of each construction method and meets the requirements of the engineering.

Description

technical field [0001] The invention relates to the field of civil engineering construction, in particular to a method for treating the liquefied sand foundation of a large storage tank. Background technique [0002] With the development of the construction industry, various types of oil storage tanks are increasing and increasing in size, the load is increasing, the technical conditions are becoming more and more complex, the limits of foundation settlement and uneven settlement are becoming stricter, and the requirements for the foundation are getting higher and higher. The foundation treatment of the storage tank (including increasing the bearing capacity, reducing the deformation of the foundation, etc.) directly affects the safety of the storage tank and also affects the normal operation of the entire project. The importance is evident. [0003] For construction on liquefied sand sites 10×10 4 m 3 Floating roof storage tanks, the existing "Building Foundation Treatmen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D3/00E02D3/02E02D5/38
Inventor 唐琼任兴文刘小平
Owner XIAN CHANGQING TECH ENG