| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide the protection structure of an excavated ditch using a mesh member to suspend down an object to be buried in the space of the excavated ditch in a state that earth retaining of the excavated ditch is effected. SOLUTION: A mesh member disposed on the ditch wall surface 3a of an excavated ditch 3 is fixed on the ditch wall surface 3a of the excavated ditch by an earth retaining material 2a in the excavated ditches at front and rear end parts in the longitudinal direction of the ditch and by preventing collapse and deformation of the excavated ditch wall of a part, where an intermediate earth retaining material 2a in the longitudinal direction of the ditch is recovered, a ditch wall surface 3a is protected. Further, it is desirable that the mesh member 1 uses diotextile and earth retaining materials 2 and 2a use a bag body expanded and contracted by fluid injected in the internal part thereof. Construction of the protection structure of the excavated ditch wall is effected such that the mesh member 1 is inserted and disposed on the excavated ditch wall surface 3a on the starting end side of ditch excavation, and after the ditch wall surface 3a is securely pressed by the earth retaining material 2, the mesh member 1 is disposed together with the intermediate earth retaining material 2a along with the progress of the excavated ditch, and after, at the ditch wall surface 3a on the terminal end side of ditch excavation, the mesh member material 1 is securely pressed by the earth retaining material 2, the intermediate earth retaining material 2a is recovered and the ditch wall surface 3a is protected by the mesh member 1.</p> |
