Construction method for pore forming in artificial rockfill layer

Abstract

The invention discloses a construction method for pore forming in an artificial rockfill layer. The construction method includes the steps that superficial-layer dimension stones are screened and removed through an excavator at a position of a pile position, cohesive soil is backfilled and compacted, and then steel plates are laid; a protection cylinder is embedded, and the center of the protection cylinder is coincided with the center of the pile position; according to the diameter of the dimension stones and the layer thickness of the rockfill layer, a rotary drilling rig and a punching drilling rig are used and are positioned on the laid steel plates for conducting pore-forming construction, and meanwhile slurry with the certain relative density is prepared for grouting pore forming; after pore forming, the pore depth is measured and inspected through a measuring line, and after verification, pores are cleaned. By means of the construction method for pore forming in the artificial rockfill layer, the aim that pore forming construction of the cast-in-place pile is conducted is achieved, normal operating of construction operation is guaranteed, the cost of the construction operation is reduced, and the efficiency of the construction operation is improved.

Description

technical field

[0001] The invention relates to a construction method for forming holes in an artificial rock filling layer. Background technique

[0002] With the rapid development of urban construction, coastal cities continue to carry out large-scale land reclamation. Most of the original land reclamation sites belong to coastal tidal landforms. The artificial landfill materials are mainly composed of granite blocks, and the diameter of the blocks is generally 20-80cm. , with a maximum diameter of more than 1m, filled with gravel, breccia and cohesive soil, and the layer thickness is uneven. When carrying out the construction of deep foundation pit support piles in the reclamation area, it is often encountered that the rock filling layer is difficult to pass through, and the hole is difficult to form, which brings troubles to the support pile construction and affects the normal construction of the building. , Increase the cost of construction operations and reduce the ef...