Molding technology and construction method of autoclaving-free self-compacting UHPC (Ultra-high performance concrete) utility tunnel

Abstract

The invention discloses an intelligent molding trolley and a construction method of an autoclaving-free self-compacting UHPC (Ultra-high performance concrete) utility tunnel. The intelligent molding trolley comprises a trolley grout preparation and storage machine, an intelligent pumping and conveying machine, an intelligent measuring and controlling case, a trolley grout inlet, a trolley grout outlet, a weight inductor, a high-pressure cleaning device and a trolley integrated controller, wherein the intelligent measuring and controlling case comprises a water-binder ratio tester, an inlet grout pressure and flow measuring and controlling instrument, an outlet grout pressure and flow measuring and controlling instrument and a safety alarm system; all devices and functions of the trolleys are all controlled by the trolley integrated controller; a display screen is equipped, and is used for receiving measured data in real time; the top surface template of a utility tunnel template is evenly provided with air outlets; and the upper part of one of side templates of the utility tunnel template is evenly provided with grout outlets, and the lower part of one of side templates of the utility tunnel template is evenly provided with grout inlets. According to the intelligent molding trolley and the construction method disclosed by the invention, mechanical intelligent construction is employed; the molding trolley is controlled by the integrated controller; grout is enabled to circulate all over a pipeline; through dynamic pressure holding, residual air contained in the grout is discharged, so that the utility tunnel is greatly promoted in quality, and is more compact.

Description

technical field [0001] The invention relates to a forming technology and construction method of a steam-free self-compacting UHPC comprehensive pipe gallery. Background technique [0002] At present, due to problems such as vibration leakage, many structural construction procedures, and complicated process connection when pouring concrete in the pipe gallery, large areas of honeycomb pockmarks, cracks, holes, and stubble (especially rotten stubble at the construction joints) appear on the surface of the concrete structure of the pipe gallery. root, wrong station). Since the pipe gallery is a large-volume concrete pouring, a large amount of hydration heat causes holes and cracks in the pipe gallery. Moreover, the vibrated concrete structure at the construction joint between the bottom plate of the pipe gallery and the wall body has vibration leakage, over-vibration, or difficulty in vibrating in place, and problems such as honeycomb pitting, errors, and rotten roots (at the ...

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Problems solved by technology

Moreover, the vibrated concrete structure at the construction joint between the bottom plate of the pipe gallery and the wall body has vibration leakage, over-vibration, or difficulty in vibrating in place, and problems such as honeycomb pitting, errors, and rotten roots (at the construction joint) are prone to occur

In addition, during the concrete pouring process, the vibrator is too close to the formwork, which will cause the formwork to deform due to overvibration, and the concrete supply is not timely, resulting in cold joints and misplacement. In short, there are many uncertainties and instabilities in manual pouring of concrete , has brought many adverse effects on the quality of concrete

[0003] When there is no machinery, the line construction can only be carried out manually. The daily workload is limited, and the number of labor is large, which is not conducive to management. The errors caused by human factors will also increase greatly, and sometimes there may be illness or other reasons. duration

[0004] The underground pipe gallery made of ordinary concrete as the main material, because it is buried in the ground, the concrete and steel bars are severely corroded and easily damaged, shortening the service life of the comprehensive pipe gallery, and ordinary concrete has low early strength and long construction period. The particle size of the aggregate is large, the fluidity is not high, and the construction performance is not good. If mechanical construction is used, the slurry without certain fluidity will have a negative impact on the construction quality and progress when transporting the slurry.

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