Construction method of replacement type internally-inserted profile steel fender post based on MJS construction method

Abstract

The invention discloses a construction method of a replacement type internally-inserted profile steel fender post based on an MJS construction method. The method comprises the steps that an MJS main machine and auxiliary equipment of the MJS construction method are prepared firstly, an in-ground pressure sensor and a monitoring displayer are connected, and pressure zero clearing is conducted underthe condition that a drill bit is free of loads; the MJS main machine is in place, zero clearing is started, a drill rod is put into a guide hole to reach the designed depth, the drill rod and the drill bit are in butt joint till the drill bit reaches the preset depth, and the drill rod is in place; after the drill bit reaches the preset depth, all technological parameters are set, and then guniting is started to form an MJS jet grouting pile; and profile steel is hoisted to the pile center position of the MJS jet grouting pile, after the position is adjusted, the profile steel naturally sinks to the elevation position through the self weight, and the internally-inserted profile steel fender post is formed. According to the method, the defects of various traditional fender forms are overcome, the method adapts to fender engineering of deep foundation pits, the disturbance influence on the surrounding environment and a foundation is small, the pile body strength is high, the lap jointlength is large, and a very good soil blocking effect and a very good water isolation effect can be achieved.

Description

Technical field

[0001] The invention relates to the technical field of construction engineering, in particular to a construction method of a replacement type inserted steel enclosure pile based on the MJS construction method.Background technique

[0002] With the development of urban construction, buildings (structures) tend to be saturated. Therefore, the impact of regional restrictions on construction projects has become a problem faced by many large and medium-sized cities. In order to solve such problems, the vertical direction is moving higher and deeper. Development, horizontal red line awareness and safety measures for surrounding buildings (structures) have become key considerations for construction projects.

[0003] The stage factors that have the greatest impact on the surrounding buildings (structures) during the construction of a deep foundation pit are mainly the control of the groundwater level and soil by the enclosure project. Choosing an appropriate enclosure form helps to b...

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