3results about How to "Avoid collapsing holes" patented technology

The utility model relates to a pile foundation structure used for soft soil in a near-edge low-lying position, which belongs to the technical field of pile foundations and comprises a main bearing pile body, a base platform and a plurality of supporting columns, the base platform is arranged at the upper end of the main bearing pile body, a plurality of reinforcing holes are formed in the base platform, and the supporting columns are arranged at the lower end of the main bearing pile body. The multiple supporting columns are inserted into the reinforcing holes in a one-to-one correspondence mode, and when the near-edge low-lying position is soft soil, the water content is high, and holes are difficult to form by a rotary drilling rig, the base table is arranged at the upper end of the main bearing pile body, the multiple reinforcing holes are formed in the base table, and the multiple supporting columns are inserted into the reinforcing holes in a one-to-one correspondence mode; the base table and the supporting columns can stabilize the soil body around the pile foundation so that the soil body can be hardened and reinforced, and the base table and the supporting columns can also stop water and prevent pile hole collapse, thick sediment at the pile bottom and pile breaking of the pile foundation.

This invention relates to the field of building construction technology, specifically to a method for clearing obstacles in inclined holes using a full-casing drilling rig. The invention includes the following steps: 1) Construction preparation and site leveling; 2) Measurement and layout of the clearing hole; 3) Guide wall construction; 4) Inserting the outer casing into the first hole; 5) Soil removal and cleaning; 6) Installing tools and a rock drilling rig, using this equipment to drill through the pile (wall) obstacle; 7) Using the full-casing drilling rig to drive the inner casing to drill through the obstacle; 8) Pulling out the inner casing and removing the pile (wall) obstacle, backfilling the hole; 9) Pulling out the outer casing; 10) Moving the drilling rig to the next hole and repeating steps 5)-9) until all obstacles are cleared. This invention is highly operable, has high construction efficiency, and is relatively fast, thus shortening the construction period.

The application discloses a high-pressure rotary jet grouting pile equipment for sedimentary rock pebble layer and a construction method thereof, and belongs to the field of foundation construction. The equipment comprises a caterpillar vehicle provided with guide rail columns and a mounting mechanism. A rotary chuck and a positioning mechanism are slidably arranged on the guide rail columns. A drill rod is detachably connected with a power head arranged on the rotary chuck. The positioning mechanism is used for limiting and driving a protective sleeve arranged on the drill rod. The protective sleeve is formed by sequentially connecting sleeve units at the head and tail. The mounting mechanism is used for mounting the sleeve unit to be mounted to the drill rod coaxially. The mounting mechanism comprises a base, a support frame and a hydraulic cylinder. The base is arranged above the positioning mechanism. The lower end of the support frame is rotatably arranged on the base. The upper end of the support frame is used for temporarily fixing the sleeve unit to be mounted. One end of the hydraulic cylinder is rotatably arranged on the base, and the other end is rotatably connected with the support frame. The sleeve unit can be mounted without stopping the operation, and each sleeve unit limits the drill rod, thereby ensuring the perpendicularity of the drill rod.