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Construction method for restraining frost heave and thaw settlement in cup-shaped horizontal freezing

A construction method and technology of frost heaving and thawing, applied in earthwork drilling, shaft equipment, wellbore lining, etc., can solve problems such as the impact of the surrounding environment

Active Publication Date: 2015-03-25
HAINAN UNIVERSITY
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AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a construction method for suppressing cup-shaped horizontal freezing, frost heaving and thawing to solve the problem of controlling frost heaving and thawing in the existing cup-shaped horizontal freezing construction method that has a greater impact on the surrounding environment

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  • Construction method for restraining frost heave and thaw settlement in cup-shaped horizontal freezing
  • Construction method for restraining frost heave and thaw settlement in cup-shaped horizontal freezing

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Embodiment Construction

[0033] The invention provides a construction method for suppressing cup-shaped horizontal freezing, frost heaving and thawing, and its specific construction steps are as follows:

[0034] The first step, the layout of pressure relief holes and grouting holes:

[0035] 1. Eight and nine pressure relief holes and grouting holes are arranged horizontally at 2.0m and 2.5m from the upper part of the outer ring pipe of the cup-shaped freezing wall, respectively, with a distance of 1.5m. Distribution, the construction process of drilling is: positioning opening and installation of orifice pipe → installation of orifice sealing device → drilling → measurement → closing the bottom of the hole → pressure test, the drilling depth is consistent with the length of the freezing pipe of the cup body;

[0036] 2. To install pressure relief pipe and grouting pipe, use Ф32×3mm or Φ45×3mm seamless steel pipe;

[0037] 3. Install a pressure gauge on the pressure relief pipe and grouting pipe. Th...

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Abstract

The invention discloses a construction method for restraining frost heave and thaw settlement in cup-shaped horizontal freezing. The method concretely includes the first construction step of arrangement of pressure release holes and grouting holes, the second construction step of frost heave control and the third construction step of thaw settlement control. The method has the advantages that as two rows of the pressure release holes and grouting holes are formed in the positions above a cup-shaped horizontal freezing wall, influences of the frost heave and the thaw settlement in the process of horizontal freezing of the horizontal freezing on surrounding formations, buildings, traffics and underground pipelines can be effectively restrained; the settlement amount of the formations can be controlled within -8mm, and the ridging amount can be controlled within 5mm; on the premise of guaranteeing the bearing capacity and the waterproof performance of the formations, cement soil reinforcement is not needed in advance, so the use amount of cement is effectively reduced, and time, the manual cost and the material cost are greatly saved.

Description

technical field [0001] The invention relates to a construction method for suppressing frost heave and thaw settlement, in particular to a construction method for suppressing cup-shaped horizontal freeze heave and thaw settlement. Background technique [0002] When the shield enters and exits the tunnel, due to the limitation of the ground environment, the construction of mixing piles and rotary grouting piles cannot be carried out, or serious water leakage and sand leakage are found when the holes are probed after chemical reinforcement. In order to improve the strength of the soil at the end of the shield tunnel and fully stop the water To ensure the safety of the shield tunnel entry and exit, the cup-shaped horizontal freezing method is usually used to reinforce the soil at the end of the shield tunnel. When this construction method is used as the reinforcement method of the end stratum, the temperature field of the stratum changes, causing frost heaving and thawing of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/10E21D11/38C04B28/26
CPCE21D11/10C04B28/26E21D11/38C04B7/00
Inventor 胡俊李艳荣肖天崟胡伟杜娟佳琳
Owner HAINAN UNIVERSITY
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