Experiment of fracturing grouting in soft flowing mucky clay in Nanjing tunneling construction;

Steel floral tube fracturing grouting technology is adopted in slop reinforcement of Shenzhen Buji eastern and western main-road.

The design method and construction process of fracturing grouting method applied in soft foundation treatment in operating Harbin—Suifenhe railway are introduced in details.

Penetration radius and grouting pressure in fracture grouting;

Following fracture grouting and reinforcement of soft clay,the grout concretion in the clay will form a veined supporting frame,leading to significant increase in compression module of the resulting composite mass.

In the light of the suddenly dangerous situation of foundation sinking during the construction of high-formwork in Shenzhen conference and exhibition center, the split grouting technique is adopted, which strengthens the bearing capacity of foundation, makes the stable foundation not sink, and assures that the top framework construction can be carried through smoothly.

In this paper,factors exerting influences on beating capacity and working mechanism of split- ring grouting have been analyzed for the soil layer anchor pole,and deducing of calculation parameter is completed for splitting grouting.

In allusion to drilling well cofferdam grouting antiseepage in riverside pump house,authors discuss hydrofracture grouting theory in soil layer,its design method and construction steps.

In accordance with hydrofracture grouting in Xiaogang-Jiangnanxi tunnel of Guangzhou,the hydrofracture grouting in soft flowing mucky,and its design method and construction steps are discussed.

According to theoretical analysis and practice of the grouting project,the grouting theory falls roughly into four categories:permeation grouting,hydrofracture grouting,compaction grouting and jet grouting.

In combination with the project example for the pavement cracking due to back fill density of rainwater and se￣wage pipe trough under roads not meet the design requirement,it should be consolidated by sleeve-valve type split grouting method and dynamic consolidation method.