Manual digging pile and its construction method in karst area
A technology for artificially digging piles and areas, which is applied in the direction of sheet pile walls, foundation structure engineering, construction, etc., and can solve the problem of incomplete chemical grouting of liquid mud in karst caves, easy collapse of boulder blasting walls, and slag buckets for temporary facilities To achieve the effect of simple and easy construction method, high construction efficiency and reducing insufficient grouting
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Embodiment 1
[0041] The karst artificial hole-digging pile includes a lap-joint cast-in-place concrete wall retaining formwork support system, a detachable inner support formwork cavity pouring and filling structure in a karst cave without fillers, a cover, and a small-diameter differential blasting technology assembly for filling water bags Integral charge structure and its protection system, anti-shake slag lifting cylinder;
[0042] The lapped cast-in-place concrete retaining formwork support system includes welded steel bars 54, steel bar sockets 56, steel plates 53 and lateral support steel bars 51; The welded steel bars 54 are fixed, and the horizontal support steel bars 51 are inserted into the steel bar sockets 56 on the inside of the steel plate 53 to form a support structure; the steel bar sockets 56 are connected to the inside of the lapped steel bars 52 by the template gripper 55; after the hole excavation is completed, Four overlapping steel formworks are used to support the f...
Embodiment 2
[0048] This embodiment adopts the lap-joint cast-in-place concrete retaining wall formwork support system, the detachable inner support formwork cavity of the karst cave without fillers, pouring and filling the cavity, the filling material of the karst cave, the top of the side wall of the karst cave, closed static pressure chemical jet grouting, and filling the water bag. The small-diameter differential blasting technology assembles the integral charge structure and its protection system, the orifice-shaped hanger, the groundwater dynamic pumping system, and the anti-shaking slag lifting cylinder and other systems.
[0049] Lap-joint cast-in-place concrete retaining formwork support system, including: lap steel bars, welded steel bars, template grippers, steel bar sockets, upper supporting steel bars, and lower supporting steel bars. After the hole is dug, the cast-in-place concrete retaining formwork is installed, and the overlapping steel bars protruding from the four steel ...
Embodiment 3
[0057] Such as Figure 1 to Figure 9 As shown, the construction method of the manual hole-digging pile in the karst area provided by the invention comprises the following steps carried out in order:
[0058] Step 1. Measure the position of the pile holes on site according to the design drawings. Set 4 protective wooden piles around the pile holes. The excavation depth of the first section is 70cm, and the vertical formwork is used for formwork support. Pour concrete to complete the construction of the first section of retaining wall, and install lock fixing reinforcement and center pile alignment steel nails at the opening;
[0059] Step 2. Install hoist 1, counterweight 13, ladder 25, orifice drainage pipe fixing ring 14, motor 12, drainage hose 6, drainage steel pipe 7, water pump 5 and other surface equipment;
[0060] Step 3: Excavate the lower section of the orifice. Before excavation, use the drainage hose 6 to connect the long drainage steel pipe 7, and the excavation ...
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