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Abstract
Processing methods of a cyclic driving of wells with a diameter over 300 mm by methods of vibro-impact pushing and combined with partial consolidation and excavation of soil on the basis of use of pneumo-percussive mashines (pneumatic bore-hole driver) are given in work. The results of researches received with use of the ground intake devices physical models have allowed to establish characteristics of change of force of resistance to the return transportation of the equipment with the taken soil core in process of his removal from a face. Analytical expressions for engineering calculation of the winch tractive force are received. Technical characteristics of the created number of the winches of scraper type working at the uniform energy carrier with shock cars – compressed air are given.The schematic diagram winch with hybrid pneumatic drive, the having variable traction and high-speed characteristic is offered at a limited expense of the energy carrier which realization of a design at vibroshock breakdown and a combined method allows to reduce time of a production cycle of formation of wells and to increase productivity of driving works. A schematic diagram of a winch with a hybrid pneumatic drive is proposed, which has variable traction and speed characteristics with a limited energy carrier consumption, the implementation of the design which in vibro-impact pushing and combined method allows to reduce time of process of formation of wells and improve the performance of the tunneling works.
Highlights
The results of researches received with use of the ground intake devices physical models have allowed to establish characteristics of change of force of resistance to the return transportation of the equipment with the taken soil core in process of his removal from a face
Technical characteristics of the created number of the winches of scraper type working at the uniform energy carrier with shock cars – compressed air are given.The schematic diagram winch with hybrid pneumatic drive, the having variable traction and high-speed characteristic is offered at a limited expense of the energy carrier which realization of a design at vibroshock breakdown and a combined method allows to reduce time of a production cycle of formation of wells and to increase productivity of driving works
Л. О классификации грунтов без жестких структурных связей по их прочностным характеристикам // ФТПРПИ
Summary
В работе приведены технологические приемы циклической проходки скважин диаметром свыше 300 мм методами виброударного продавливания и комбинированного с частичным уплотнением и экскавацией грунта на основе использования пневмоударных машин (пневматических генераторов импульсной нагрузки). Среди многообразия технологических приемов для получения скважин непроходного сечения достаточно известны виброударные способы проходки с использованием пневматических машин ударного действия. Так как не требует погружения трубной плети на всю длину перехода и выхода ее в приемный приямок, позволяет проводить экскавацию керна на любом этапе проходки, обеспечивая тем самым приемлемые скоростные показатели процесса, эффективно вести работы в широком спектре грунтовых условий. 1 – кольцевой рабочий орган; 2 – пневмоударный привод; 3 – устье скважины; 4 – лебедка; 5 – грунтовый керн ное устройство 4, выполненное в виде полого цилиндрического керноприемника в качестве рабочего органа, жестко соединенного с пневмоударным приводом. Обратное извлечение устройства с керновой массой в рабочий приямок производится канатной лебедкой 5
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