Large-section inclined shaft open channel segment construction method and high-strength combined form board thereof

Abstract

The invention belongs to the technical field of inclined shaft construction, and discloses a large-section inclined shaft open channel segment construction method and a high-strength combined form board thereof. The combined form board comprise an inner form board and an outer form board mounted on the outer side of the inner form board, arc binding steel reinforcing ribs are mounted between the inner form board and the outer form board, the inner form board is formed through splicing of multiple combined form board bodies, each combined form board body is composed of four supporting legs andnine combined arch plates, the outer form board comprises a steel plate strip and a 9mm plate, the steel plate strip is fixedly connected to the inner form board through the 9mm plate and a lengthening bolt, due to use of the high-strength whole form board, in the construction application, the economic benefits are extremely obvious, the conditions that a traditional splicing form board in vertical self-closed framework is slow in concrete pouring speed, the surface soil segment is slow in construction proceed, and staggered forming is poor can be solved, the form board deforming capacity is enhanced, the service life of the form board is prolonged, the construction safety and stability can be improved, and the construction efficiency and the construction proceed can be improved.

Description

Technical field [0001] The invention belongs to the technical field of inclined shaft construction, and in particular relates to a construction method for an open channel section of a large-section inclined shaft and a high-strength combined template. Background technique [0002] Under the guidance of national policies and under the influence of the supply-demand relationship of the clean coal market, China Pingmei Shenma Group should upgrade the production capacity of high-quality mines to release high-quality production capacity; combined with the current problems in the group’s mine production and the group’s long-term development plan, the Group will promptly Shoushan No. 1 Mine added a main inclined shaft project to achieve productivity upgrades; therefore, the construction of the main inclined shaft project puts forward higher requirements on the construction period, and the construction speed must be accelerated; the main inclined shaft of Shoushan No. 1 mine is a key proj...

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Problems solved by technology

[0003] The designed engineering volume of the main inclined shaft of Shoushan No. 1 Mine is 2723.1m, including the shaft section, the entrance section and the coal entrance section. Both the entrance section and the coal entrance section include open channel construction. Design 29.85m, slope -19.8°, excavation width 6.2m, excavation height 4.7m, excavation section S=26.7m 2 , using double-layer steel bars and masonry for support, T=400mm, the thickness of the roadway bottom is 200mm, and the sand and stone slurry is 300mm. Due to the large excavation section of the open channel at the pedestrian entrance, the support form is complicated and the support workload is large (open channel After the excavation, the slope is temporarily anchored and net sprayed + sand and gravel flakes for the bottom + double-layer steel bar binding support + 400mm thick concrete pouring), the conventional construction method will inevitably lead to delays in the construction period of the open channel section, so our unit has to seek new construction technology and construction equipment to meet the mine’s construction period and quality requirements for the main inclined shaft. In order to achieve the goal of the construction period, the open trench must be excavated as soon as possible. It coincides with the rainy season, and the influx of surface water is large, which will inevitably cause large damage to the excavation of the surface soil. affect the working environment

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