Guiding and positioning device of pre-embedded grouting drilling on needle girder trolley

Abstract

The invention discloses a guiding and positioning device of pre-embedded grouting drilling on a needle girder trolley. The guiding and positioning device comprises a trolley template and a pre-embedded grouting casing pipe; the trolley template is provided with a grouting hole according to a grouting position, and a pre-embedded hole is chiseled in a corresponding concrete-spray surface in advance; the front end of the pre-embedded grouting casing pipe penetrates through the grouting hole of the part which needs to be subjected to grouting construction, and is perpendicularly inserted into the pre-embedded hole, and the exposed part of the pre-embedded grouting casing pipe is reserved at the tail end of the pre-embedded grouting casing pipe outside the trolley template; the pipe end of the exposed part of the pre-embedded grouting casing pipe is blocked through a blocking plate. The guiding and positioning device of pre-embedded grouting drilling on the needle girder trolley effectively solves the angle problem of drilling during later grouting construction, the first support steel arching and steel bars placed on the lining cannot be avoided, the surface of the concrete is damaged, and a series of problems of the quality defect and the like are generated; the progress of the later grouting construction is quickened, the defect repair expense is lowered, and the quality for grouting engineering construction is guaranteed.

Description

technical field [0001] The invention relates to the technical field of tunnel lining concrete and grouting construction in water conservancy and hydropower projects, in particular to a guiding and positioning device for pre-buried grouting drilling holes on a needle beam trolley. Background technique [0002] The grouting construction projects of the main tunnel control section of the first water intake tunnel of the South Main Canal include: backfill grouting and consolidation grouting. The backfill grouting engineering volume is 32,646 m2, and the consolidation grouting section engineering volume is 34,576.55 m2. The backfilling grouting is distributed with 3-5 holes in the range of 120° at the top, and the consolidation grouting is arranged with 12 holes in each section, and the adjacent angle is 30°. The consolidation grouting holes and backfilling grouting holes on the same section are used. [0003] According to the characteristics of the water intake tunnel project at...

AI Technical Summary

Problems solved by technology

[0008] First of all, the traditional grouting drilling construction method is to drill holes on the lined concrete surface after the lining concrete is completed. When drilling, it is necessary to destroy the lining surface; due to the impact of concrete blanking and vibration, the displacement cannot be found. Leaving a seepage channel for the formed lining structure, which brings hidden dangers to the operation of the permanent flow structure; the overall pre-embedded grouting pipe in the warehouse cannot guarantee the position and direction of the grouting pipe

[0009] Secondly, the traditional grouting drilling construction method still has problems such as the inability to guarantee its position and direction, the primary hole formation rate of the later grouting drilling, and the construction progress.

[0010] Moreover, during the drilling operation of the grouting project, due to the unavoidable factors such as steel arches, anchor rods, and steel bars, and the limitation of the construction platform, the angle of the drilling cannot be guaranteed. In order to ensure the construction progress, it is necessary to increase the drilling personnel to carry out drilling Hole work, increased labor costs

[0011] Finally, when the drilling operation is carried out on the concrete surface that has been lined, additional holes need to be drilled for the anchor rods, steel arches and steel bars of the second lining for the first-stage support, resulting in a low porosity rate, long construction time, and Increased cost; after the lining concrete surface is damaged, the defect repair cost is increased

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