Construction method of flow plastic-state sludge sand stratum diaphragm wall

Abstract

The invention discloses a construction method of a flow plastic-state sludge sand stratum diaphragm wall. The method comprises the steps of forming a diaphragm wall through diaphragm wall slot and concrete pouring, wherein slot construction comprises grooving and rectifying steps; forming slotted wall guard piles at two sides of a flow plastic-state sludge sand stratum diaphragm wall by adopting a stirring pile; and assisting a grooving machine in inner and outer rectification by using an excavator during grooving construction on inclined groove segments of the slotted wall guard piles with a shallow range below a slot opening, entering a grab bucket of the grooving machine into a vertical opening and grooving while trimming, wherein the step of assisting a grooving machine in inner and outer rectification by using the excavator is that the excavator pushes the upper part of the grab bucket body, so that the lower part of the grab bucket body reversely moves relative to the upper part of the grab bucket body to push the inclined slotted wall guard piles through the grab bucket and to strengthen the inclined slotted wall guard piles. According to the method, the perpendicularity of the slot is ensured through fast and effective correction in the diaphragm wall grooving process, the leakage condition of the diaphragm wall is effectively prevented and the construction period is shortened.

Description

technical field [0001] The invention relates to the field of water conservancy and hydropower engineering, in particular to a construction method for a connecting wall of a flow-plastic silty sand-containing stratum. Background technique [0002] With the rapid development of domestic water conservancy and hydropower engineering construction, the treatment scope, depth, and stratum structure are becoming more complicated and diversified. In the prior art, when the ground connection wall construction is carried out for the project engineering with flow-plastic silty sandy strata, in order to ensure the stability of the groove wall and prevent the ground connection wall from collapsing during the formation of the groove, it is often used On both sides of the ground connection wall, three-axis mixing piles are used as the groove wall protection piles. [0003] However, due to the influence of various factors such as geological conditions, part of the groove wall retaining pile...

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Problems solved by technology

[0003] However, due to the influence of various factors such as geological conditions, some of the groove wall retaining piles will be inclined, so the construction axis of the ground connection wall is seriously encroached, making the hydraulic groove forming machine very easy to deflect during the groove forming process

Since the reinforcement cage of the ground connection wall is installed under the groove at one time, a slight deviation of the slot hole will not only cause the reinforcement cage to not be installed smoothly, but also cause the ground connection wall to occupy other adjacent used spaces after excavation. Therefore, The verticality of the slot hole must be ensured during the slotting process, otherwise once the above situation occurs, the construction progress will be seriously affected

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