Construction method of reinforced concrete support structure of diaphgram wall retaining foundation pit

Abstract

The invention discloses a construction method of a reinforced concrete support structure of a diaphgram wall retaining foundation pit. The reinforced concrete support structure of the diaphgram wall retaining foundation pit mainly comprises an underground diaphragm wall, a underground diaphragm wall main reinforcement, a pre-buried anchor cable fixing end, a anchor cable protecting tube, an anchor cable, a straight sleeve, a reserved connecting reinforcement with mantle fibers, a cross-shaped stiffened plate with holes, a horizontal connecting reinforcement with a thread, a fiber cloth isolating film, a vertical filling agent main pipe, a horizontal filling agent main pipe, a post-installed L-shaped lower supporting plate, a post-installed Z-shaped upper fixing plate, a pre-buried PVC pipe, a supporting main reinforcement and a reinforced concrete support. The construction method comprises the steps of trenching construction, reinforcement cage manufacturing, concrete pouring, part of a diaphgram wall chiseling off, crown beam and reinforcement concrete support pouring, demolition blasting and the like. The construction method of the reinforced concrete support structure of the diaphgram wall retaining foundation pit has the advantages that shear resisting strength is high, connection is convenient and quick, and steel can be recycled and reused; and the purposes of shortening the construction period and reducing construction cost are achieved.

Description

technical field [0001] The invention relates to the field of deep foundation pit engineering, in particular to a construction method for a reinforced concrete support structure of a foundation pit surrounded by a ground connection wall. Background technique [0002] With the rapid development of my country's national economy and technology, the construction of public infrastructure is the inevitable result of the development of formal science and technology. my country's subway construction has made rapid development since the 1990s. The underground diaphragm wall is a form of enclosure structure often used in the construction of urban subway stations. The construction of the underground diaphragm wall is widely used due to its advantages of no noise, no vibration, and little impact on surrounding buildings. At the same time, it has good vertical anti-leakage Protective measures are widely used in the main enclosure structure engineering of the station. However, its constru...

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Problems solved by technology

However, its construction is greatly affected by geological conditions and the surrounding environment. During the construction process, the groove wall is prone to collapse, the groove is deflected, and there may be leakage at the joint when the main body of the foundation pit is excavated.

In the face of tight construction schedules, various and complex underground pipelines, and difficult traffic relief, it is difficult to ensure the smooth completion of construction tasks under the condition of safety and quality assurance

[0003] In the existing foundation pit engineering, the reinforced concrete support has the characteristics of high rigidity, small deformation, and good pressure resistance, and is widely used in the internal support engineering of the foundation pit support; at the same time, the reinforced concrete internal support also has slow construction speed and high cost. It is difficult to dismantle and cannot be reused after dismantling.

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