Groove grabbing replacement filling obstacle clearing method before SMW construction method pile construction of boulder-containing stratum

Abstract

The invention provides a groove grabbing replacement filling obstacle clearing method before SMW construction method pile construction of a boulder-containing stratum, and relates to the technical field of groove grabbing replacement filling obstacle clearing. The method comprises the following steps that digging is conducted on the surface of a base layer along the preset track position where the SMW construction method pile needs to be implemented, and a guide ditch is formed; stone blocks or waste rainwater pipes in the soil layer below the guide ditch are crushed; groove grabbing and replacement filling treatment is carried out in the guide groove; and after replacement filling is completed, SMW construction method pile construction is prepared; By means of the method, large stones and waste rainwater pipes existing in the stratum are removed, the collapse risk is reduced, good operation conditions are provided for the SMW construction method, normal operation of the SMW construction method is guaranteed, and the good operation effect is achieved after the SMW construction method is completed; generally speaking, the construction mode is small in construction risk, high in safety and suitable for stratum obstacle removing construction when construction of the construction method piles is difficult due to the fact that the stratum contains unascertained large stones during construction of the SMW construction method piles.

Description

technical field [0001] The invention relates to the technical field of grasping groove replacement, filling and obstacle removal, in particular to a method for grasping groove replacement, filling and obstacle removal before construction of SMW construction method piles in strata containing large rocks. Background technique [0002] The SMW construction method is also known as the new cement-soil mixing pile wall, that is, inserting H-shaped steel (mostly H-shaped steel, but also Larsen type steel sheet piles, steel pipes, etc.) , making it a retaining wall of a supporting structure with both functions of force bearing and anti-seepage. [0003] The supporting features of the SMW support structure are: basically no noise during construction, little impact on the surrounding environment, and reliable structural strength. It can be used in any occasion where cement-soil mixing piles are suitable, especially suitable for clay and fine sand. Mainly soft ground; good water-retai...

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Problems solved by technology

[0006] 1. It is necessary to design the position of the SMW construction method pile according to the detailed geological survey and supplementary survey report; if there are a large number of blocks with a diameter of more than 0.5m, the maximum particle size is 1.3m, and the depth of the block layer is distributed between 3.8m and 6m, and the construction method pile If there is a DN1500 waste rainwater pipe at the construction site, the construction method pile cannot be directly constructed;

[0007] 2. There is a risk of landslides if the conventional method of filling and clearing is adopted, and the construction site on site is narrow, and the straight-line distance between the construction method piles and the main road is only 2m, which does not meet the conditions for sloping and excavation

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