Construction method of long auger drilled grouting pile with medium hole vibrating casing retaining wall

Abstract

The invention relates to a construction method of a medium-hole vibrating casing wall protection type long spiral cast-in-situ bored pile. The construction method comprises the steps that surveying and setting-out are conducted for determining a pile position, and a long spiral drilling machine is made to be aligned to the pile position; the long spiral drilling machine is started, and a spiral drill rod and a drill bit are driven to conduct rotary drilling vertically downwards; a medium-hole vibrating hammer is started at the same time to drive a pile casing to follow up vertically downwards to a preset pile end depth; the spiral drill rod idles, so that residue soil at the bottom is discharged; the drill rod is lifted, concrete is poured into a pile hole while the spiral drill rod is lifted, and concrete pouring is stopped after the spiral drill rod is lifted to a preset height; after concrete pouring is completed, the pile casing is left in the pile, the long spiral drilling machine is removed out of the pile hole, and a steel bar insertion device and a steel reinforcement cage are inserted into the poured concrete together by means of a crane while being vibrated; and after the steel reinforcement cage is inserted to a preset depth, the steel rib insertion device is pulled out, the pile casing is completely pulled out, and the cast-in-situ pile is solidified and formed. The construction method of the medium-hole vibrating casing wall protection type long spiral cast-in-situ bored pile has the advantages that the quality of the cast-in-site pile is high, construction is safe, the cost is low, the speed is high, environmental friendliness is achieved, and results are practical.

Description

technical field

[0001] The invention relates to the technical field of building foundation engineering, in particular to a construction method of a long helical bored grouting pile with a middle-hole vibrating casing retaining wall. Background technique

[0002] Cast-in-situ piles have the advantages of no vibration, no soil extrusion, low noise, and are suitable for use in densely built urban areas during construction, and are widely used in construction projects. According to different hole-forming techniques, cast-in-situ piles can be divided into bored cast-in-place piles, sinking tube cast-in-place piles, and artificially dug hole-filled cast-in-place piles.

[0003] Bored cast-in-place piles refer to piles that are fully replaced by drilling pile holes with drilling machines and pouring concrete in the holes (or hanging steel cages in the holes first). According to whether the drilling machine adopts the mud retaining process for construction during the drilling proce...

Examples

Embodiment 1

[0031] Example 1, such as figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown, the main mechanical equipment and accessories required for the construction of long auger drilled grouting piles with vibrating casing walls in the middle hole include: long auger drilling machine 1, vibrating hammer for middle hole 2, casing 3, tendon inserter 8, small vibration Hammer 7; auxiliary mechanical equipment includes: crane 10, concrete delivery pump 4, excavator. The installation and connection of mechanical equipment includes: the long auger rig 1 connects and drives the auger rod 5 and the drill bit 6; the long auger rig is provided with a cleaner 12, and the middle-hole vibratory hammer 2 clamps the casing 3 with a hydraulic clamp 13. The auger drill pipe 5, drill bit 6, center hole vibratory hammer 2 and casing 3 overlap in the axial direction; the small vibratory hammer 7 is connected to and drives the rib inserter 8; the concrete delivery...

technical field

[0001] The invention relates to the technical field of building foundation engineering, in particular to a construction method of a long helical bored grouting pile with a middle-hole vibrating casing retaining wall. Background technique

[0002] Cast-in-situ piles have the advantages of no vibration, no soil extrusion, low noise, and are suitable for use in densely built urban areas during construction, and are widely used in construction projects. According to different hole-forming techniques, cast-in-situ piles can be divided into bored cast-in-place piles, sinking tube cast-in-place piles, and artificially dug hole-filled cast-in-place piles.

[0003] Bored cast-in-place piles refer to piles that are fully replaced by drilling pile holes with drilling machines and pouring concrete in the holes (or hanging steel cages in the holes first). According to whether the drilling machine adopts the mud retaining process for construction during the drilling proce...

Examples

Embodiment 1

[0031] Example 1, such as figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown, the main mechanical equipment and accessories required for the construction of long auger drilled grouting piles with vibrating casing walls in the middle hole include: long auger drilling machine 1, vibrating hammer for middle hole 2, casing 3, tendon inserter 8, small vibration Hammer 7; auxiliary mechanical equipment includes: crane 10, concrete delivery pump 4, excavator. The installation and connection of mechanical equipment includes: the long auger rig 1 connects and drives the auger rod 5 and the drill bit 6; the long auger rig is provided with a cleaner 12, and the middle-hole vibratory hammer 2 clamps the casing 3 with a hydraulic clamp 13. The auger drill pipe 5, drill bit 6, center hole vibratory hammer 2 and casing 3 overlap in the axial direction; the small vibratory hammer 7 is connected to and drives the rib inserter 8; the concrete delivery...

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