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Construction system and construction method of weak disturbance controlled blasting in foundation pit

A weak disturbance and controllable technology, applied in blasting, infrastructure engineering, excavation, etc., can solve problems such as large excavation workload, and achieve the effect of improving quality, reducing difficulty, and improving stable state

Active Publication Date: 2022-02-11
CCFEB CIVIL ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This construction method excavates vibration-reducing grooves to reduce the vibration impact on the rock wall of the foundation pit and surrounding structures, and achieves good construction results under suitable working conditions, but the excavation workload is large, and this method does not involve lifting explosives Charge positioning accuracy, reduce the construction difficulty of lead holes and other technologies

Method used

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  • Construction system and construction method of weak disturbance controlled blasting in foundation pit
  • Construction system and construction method of weak disturbance controlled blasting in foundation pit
  • Construction system and construction method of weak disturbance controlled blasting in foundation pit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Weak disturbance controlled blasting construction system of foundation pit, please refer to Figure 1 to Figure 8 , including pilot hole drilling machine 1, charge bag 2, hole slag removal device 3, blasting cover body 10, drug delivery device 14, machine-assisted positioning facility 4, and blast hole temporary support body 5;

[0064] see figure 1 The drilling rig auxiliary positioning facility 4 includes a flexible joint filler layer 401 laid on the upper surface of the soil layer 7 to be blasted, a drilling rig positioning plate 402 arranged on the flexible joint filling material layer 401, and a connecting pier arranged on the drilling rig positioning plate 402 403, the auxiliary alignment body 404, which is set on the connecting pier 403 and the drilling machine support plate 405 connected with the drilling machine connection plate 411, the bottom end is connected with the drilling machine support plate 405, and the top end is connected with the pilot hole drillin...

Embodiment 2

[0078] The weak disturbance controlled blasting construction method of foundation pit is characterized in that it includes the following steps:

[0079] 1) Construction preparation

[0080] Smooth the surface of the soil layer 7 to be blasted, determine the amount of explosives 12 in the blast hole 8 and the position of the blast hole 8, and prepare the hole slag removal device 3 and the double-cavity charge bag 2;

[0081] 2) Rig positioning, pilot hole and drilling

[0082] On the upper surface of the soil layer 7 to be blasted, a layer of flexible joint filler layer 401 and a drilling rig positioning plate 402 are successively laid, and the flatness of the drilling rig positioning plate 402 is adjusted by an elevation adjustment body 407; Connect the pier 403 and the drill support plate 405, so that the lower end of the pilot hole drill 1 is connected to the drill support plate 405 through the drill connection plate 411, and an auxiliary alignment body 404 is set between t...

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Abstract

The invention discloses a foundation pit weak disturbance controllable blasting construction system and construction method, comprising a pilot hole drilling rig, a charge bag, a hole slag removal device, and a blasting covering body, and is characterized in that it also includes drilling rig auxiliary positioning facilities, blasting holes Temporary support; the drilling rig auxiliary positioning facility includes a flexible joint filler layer laid on the surface of the soil layer to be blasted, a drilling rig positioning plate arranged on the flexible joint filling material layer, a connecting pier arranged on the drilling rig positioning plate, and auxiliary Calibration body, set on the connecting pier, the drilling rig support plate connected with the drilling rig connection plate, the bottom end is connected with the drilling rig support plate, the calibration vertical plate connected with the pilot hole drilling machine at the top through the auxiliary calibration body, and the pilot hole drilling machine The connecting plate of the drilling rig connected to the lower end is arranged on the elevation regulating body at one end of the positioning plate of the drilling rig. The foundation pit weak disturbance controlled blasting construction system and construction method of the present invention can improve the quality of on-site construction, reduce the difficulty of on-site construction, improve the accuracy of explosive placement, and reduce the impact of blasting construction on the environment.

Description

technical field [0001] The invention relates to a foundation pit weak disturbance controlled blasting construction system and construction method that can improve the quality of on-site construction, reduce the difficulty of on-site construction, improve the accuracy of explosive placement, and reduce the impact of blasting construction. It belongs to the technical field of foundation pit engineering construction and is applicable to Excavation works for foundation pits. Background technique [0002] In order to improve the efficiency of on-site construction, when excavating rocky slopes or foundation pits, the construction technology of blasting excavation is often used. During blasting construction, it usually includes the steps of pilot hole, charge and blasting, among which the quality of pilot hole and the accuracy of charge positioning are often the key factors affecting the quality of blasting construction. [0003] There is a rock foundation pit control blasting con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F42D1/08F42D1/00E02D17/02
CPCF42D1/08F42D1/00E02D17/02
Inventor 戴良辉张红卫王鹏曹琼周闽
Owner CCFEB CIVIL ENG