Abstract: All-around type ground reinforcing and consolidating method comprises an excavating step for forming an excavated space in a predetermined area in the ground by using a dual excavating rod composed of an outer excavating member and an inner excavating member which is movably arranged in the outer excavating member; a retracting step for retracting the inner excavating member from the outer excavating member, whereby the outer excavating member is remained in the excavated space; a check step for checking the excavated space by inserting a light member containing a battery into the excavated space; an inserting-step for inserting an injection rod into the outer excavating member; a pressure adjusting step for adjusting the pressure in the excavated space; and an injecting step for injecting a hardening material into the excavated space with retracting the outer excavating member and the injection rod, whereby the predetermined area can be consolidated.

Abstract: An all-round improved ground body forming device comprising a hollow outer casing with an outer metal bit at its tip end and a casing connecting section at its rear end, a casing advancer with an inner bit and a sub-bit for supporting the inner bit at its tip end and an arrowhead-shaped section to be engaged at its rear end, a casing advancer receiving and recovery device which has at its tip end an engaging section to catch the said arrowhead-shaped section and has a contracting and retracting section at an intermediate position between the main body section and the said engaging section, a hardening agent injection rod cosisting of one or more air injection pipes, a hardening agent injection pipe, a high pressure water injection pipe, and a slime discharge pipe, a multiple pipe swivel joint which is provided to correspond with the said hardening agent injection rod, and a method to form an improved ground body by the said device.

Abstract: An all-round improved ground body forming device comprising a hollow outer casing with an outer metal bit at its tip end and a casing connecting section at its rear end, a casing advancer with an inner bit and a sub-bit for supporting the inner bit at its tip end and an arrowhead-shaped section to be engaged at its rear end, a casing advancer receiving and recovery device which has at its tip end an engaging section to catch the said arrowhead-shaped section and has a contracting and retracting section at an intermediate position between the main body section and the said engaging section, a hardening agent injection rod consisting of one or more air injection pipes, a hardening agent injection pipe, a high pressure water injection pipe, and a slime discharge pipe, a multiple pipe swivel joint which is provided to correspond with the said hardening agent injection rod, and a method to form an improved ground body by the said device.