Hole collapse prevention construction device and cast-in-place pile construction technology

A construction device and hole collapse technology, which is applied in the direction of drilling with mechanical conveying device, sheet pile wall, foundation structure engineering, etc., can solve the problems affecting the efficiency of pile hole rotary excavation and the construction efficiency of cast-in-situ piles, etc., and achieve improvement Improve construction efficiency, prevent hole collapse, and improve support performance

Pending Publication Date: 2022-04-19
中交二公局萌兴工程有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned related technologies, the applicant believes that after the sleeve is buried, the pin shaft connecting the sleeve connector and the drill pipe needs to be removed, and then the rotary drilling drill is installed, and then the soil is drilled through the rotary drilling tube, which affects the rotation of the pile hole. The efficiency of excavation affects the construction efficiency of cast-in-place piles

Method used

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  • Hole collapse prevention construction device and cast-in-place pile construction technology
  • Hole collapse prevention construction device and cast-in-place pile construction technology
  • Hole collapse prevention construction device and cast-in-place pile construction technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] refer to figure 1 , figure 2 with image 3 , a construction device for preventing collapse includes a drill pipe 1, a rotary drilling bit 2 for rotary digging pile holes, a sleeve 3, at least two sets of connecting rods 31, a lifting assembly 5 for soil extraction, and a casing 6 The supporting assembly 4 that descends synchronously with the rotary drilling bit 2, the rotary drilling bit 2 and the drill pipe 1 are arranged concentrically, the rotary drilling bit 2 is fixedly connected with the suspended end of the drilling pipe 1, and the rotary drilling bit 2 and the drilling pipe 1 are connected by bolts Joint connection; one end of the connecting rod 31 is connected with the inner wall of the sleeve 3, and the other end is rotationally connected with the drill pipe 1. The connecting rod 31 can be set to two groups, three groups, or four groups, and each group The number of connecting rods 31 can be set to three, four, or five, as long as the stable connection betw...

Embodiment 2

[0057] refer to Image 6 with Figure 7 , a construction technique for cast-in-situ piles, comprising the following steps:

[0058] S1. Measure the setting-out positioning pile hole: according to the construction requirements, measure the opening position of the setting-out positioning pile hole and mark it;

[0059] S2. Prefabrication of the casing 6: one end of the casing 6 is integrally connected with the limiting convex rib 61, and the end of the casing 6 away from the limiting convex edge 61 is provided with a limiting groove 62 for inserting the limiting convex rib 61. The casing 6 includes The first arc segment 63 and the second arc segment 64, the first arc segment 63 and the second arc segment 64 are arranged symmetrically about the axis of the casing 6, and the first arc segment 63 is close to the side of the second arc segment 64 At least two positioning rods 65 are provided, and there are two positioning rods 65 in this application, and the positioning rods 65 an...

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Abstract

The invention relates to the technical field of highway construction, in particular to a hole collapse prevention construction device and a cast-in-place pile construction technology.The hole collapse prevention construction device comprises a drill rod and a rotary excavating drill bit, the rotary excavating drill bit is fixedly connected with the suspended end of the drill rod, and the hole collapse prevention construction device further comprises a sleeve, at least two sets of connecting rods, a lifting assembly and a supporting assembly; one end of the connecting rod is connected with the inner wall of the sleeve, the other end of the connecting rod is rotatably connected with the drill rod, the supporting assembly comprises a lantern ring, a plurality of pull rods, a plurality of supporting rods and diameter expanding pieces, one end of each supporting rod is rotatably connected with the sleeve, one end of each pull rod is rotatably connected with the supporting rod, and the other end of each pull rod is rotatably connected with the lantern ring; the horizontal projection diameter of the rotary drilling bit is smaller than the inner diameter of the pile casing. The pile hole wall is supported by the pile casing through synchronous movement of the rotary excavating drill bit and the pile casing, so that the pile hole wall is in a protection state, meanwhile, the rotary excavating efficiency of the pile hole is improved through the synchronous action of the lifting assembly and the rotary excavating drill bit, and then the construction efficiency of a cast-in-place pile is improved.

Description

technical field [0001] The present application relates to the technical field of highway construction, in particular to a construction device for preventing hole collapse and a construction technique for cast-in-situ piles. Background technique [0002] In highway construction, it is often necessary to pour concrete pouring piles to improve the support performance of the road in sections that are prone to subsidence or elevated construction sections; during the pouring process of concrete pouring piles: first, set out the line to locate and determine the position of the pile hole rotary excavation; secondly , set the casing; third, drill into the soil; fourth, place the reinforcement cage; finally, cast-in-situ piles are poured into shape to realize the processing of cast-in-situ piles. At present, during the construction of cast-in-situ piles, the rotary drilling is used to drill and take soil, so as to ensure the high efficiency and safety in the construction of cast-in-si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B7/20E21B7/00E02D5/34E02D5/68E02D17/08
CPCE21B7/201E21B7/005E02D5/34E02D5/68E02D17/08
Inventor 马生伟刘斌张小波李东刘宇罗斌祥郑茂森张小东
Owner 中交二公局萌兴工程有限公司
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