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Method for designing circular pile freezing wall

A design method and technology of freezing walls, applied in soil protection, infrastructure engineering, construction, etc., can solve the problems of high construction cost, high construction difficulty, and heavy workload

Inactive Publication Date: 2010-10-20
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
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Problems solved by technology

However, in practice, when the current passes through the resistance, energy will be generated, which will directly affect the accuracy of temperature measurement, and there are defects such as heavy workload, high construction difficulty and high construction cost.

Method used

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  • Method for designing circular pile freezing wall
  • Method for designing circular pile freezing wall
  • Method for designing circular pile freezing wall

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Embodiment Construction

[0015] The specific implementation of the present invention will be described in further detail below in conjunction with the examples, but the protection scope of the present invention should not be limited by this.

[0016] After the frozen pipe is driven into the soil and frozen for 60 days, it is necessary to determine the thickness of the frozen wall and the location of the excavation according to the temperature field of the frozen soil.

[0017] 1. Take multiple points at intervals of several meters on both sides of the freezing tube, and drill monitoring holes with a depth of more than 0.5m and a diameter of 10-15mm.

[0018] 2. Measure the temperature of each well with a high-sensitivity thermometer.

[0019] 3. Because the soil enters the steady state heat transfer stage at this time, its temperature field can be described by Laplace equation. Therefore, according to the measured temperature, the temperature of two of the holes is arbitrarily taken, and multiple gro...

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Abstract

The invention discloses a method for designing a circular pile freezing wall. The method comprises the following steps of: 1, separately taking a plurality of points on the inner and outer sides of a freezing pipe at an interval of several meters and drilling a monitoring hole at each point; 2, separately measuring the temperature of each hole by using a thermometer; 3, taking the temperatures of any two holes according to the temperatures measured in step 2 and taking a plurality of groups; and working out the temperature field analytic expression of a rectangular foundation bit by applying the method of separating variables based on the data of each group and the Laplace's equation. In the method, the temperature field of the freezing wall is analyzed in a high-precision, fast and convenient and effective way, so that the method provides a new service for the freezing method construction and ensures the construction security.

Description

technical field [0001] The invention relates to the field of freezing method construction, in particular to a design method of a circular pile frozen wall. Background technique [0002] Artificial freezing technology uses artificial refrigeration to reduce the temperature of the soil to form a frozen wall in the soil layer, thereby building a stable and impermeable frozen soil wall to maintain the stability of the soil around the excavation, resist water pressure, It is a special civil engineering construction technology to prevent groundwater intrusion and other purposes. [0003] In 1956, after the first successful application in westerly drilling in Kailuan Forest in my country in 1956, this method has become a consistent usage in my country's coal mine engineering through complex topsoil layers. At present, this method has been extended to urban construction, subway, bridge piers, anchorage foundation pits and other engineering constructions. In foreign countries, such...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/115
Inventor 陈有亮王鹏刘明亮蒋立浩尹珍珍周有成
Owner UNIV OF SHANGHAI FOR SCI & TECH
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