SU1040160A1 - Actuator of shield for boring tunnels in running and weakly stable soils - Google Patents

Abstract

THE EXECUTIVE BODY FOR PASSAGE OF TUNNELS IN THE BULK AND MILL-RESISTANT GROUND, including but-no. the chewing ring and combined pads located therein, each of which has cutting and metering parts that are hingedly interconnected, on the lower side of which there is a turning mechanism for the metering part, made in the form of semi-springs, the free end of which is fixed by means of a movable element, characterized in that , in order to increase operational reliability and reduce the resistance to penetration of the shield into the face, the root end of the semi-springs is installed by means of a pad with an insert on the dosing part, while the deposit The head is placed between the metering part and the half-spout, and the free end of the half-springs is installed (L with the possibility of interaction through the slide with a stop.

Description

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ABOUT

O The invention relates to tunneling in loose soils and can be used in shields intended for driving tunnels in loose rocks and unstable soils. Known is the executive body of the shield for driving tunnels in loose and low-tenacious rocks, including a knife ring and horizontal cutting shelves placed in it with doses of rectangular elements and the mechanism of their rotation in the vertical plane of the joint venture. The presence of a spring connection between the dosing element and the horizontal cutting shelves provides for the regulation of the volume of rock scree on the dosing elements when the physical and mechanical properties of the rock change in the bottomhole. However, the location of the raiffix springs near the zones where the rock is fractured causes an hour spring seizures and creates additional resistance when moving the bushing. Known is the Jupiter, a nitrous organ of a tunnel for tunneling in loose and unstable soils, including the knife ring and combined sites located in it, each of which has cutting and dosing parts that are hinged between each other, on the bottom of which a turning mechanism of the dosing part is installed , made in the form of semi-springs, the free end of which is fixed by means of the movable element C2. However, the location of the main elements of securing semi-springs and adjustable support on the lower side of the cutting part of the site near the zone where the rock breaks down leads to a permanent stay of the entire support-controlled system in the rock, which causes disruption in its operation and creates significant additional resistance to penetration hammer a knife ring of a board. The purpose of the invention is to increase the reliability of the device and reduce the resistance to the implementation of the shield in the face. The goal is achieved by the fact that the root end of the half-spout is installed by means of a pad with an insert on the dosing part, the insert is placed between the dosing part and the half-spout, and the free end of the half-springs is interoperable by means of a slide with a stop. In Fig.1 shows the Nozhev part of the proposed tunneling shield installed in her combined platforms; Fig. 2 shows the structure of the combination pad Combined platforms are located in the knife ring 1 of the tunnel shield 2, each of which has a cutting 3 and dispensing 4 parts interconnected by a hinge 5. The rotation mechanism of the dispensing part 4 of the combined platform is made using rotary cylinders 6 equipped with a movable-1 element in the form of a slide with an emphasis 7. On the lower side of the metering part 4, at the end opposite to UJapnipa 5, there are mounted pads 8 with removable liners 9. The root end of the semi-springs 6 is rigidly fixed with bolts 10 in the block 8, free horses s 6 through the slider 7 vaz.odimodeydrutov with the lower side of the cutting part of the combined platform, pressed to it by force half springs 6. The insert 9 in the block 8 can adjust the initial position of the half springs 6. When the sinking shield 2 is working, loose or unstable soil under the action of a knife rings 1 and the combined sites, as well as under the action of their own force of body, destroys the ground debris at the sites. Depending on the physicomechanical properties of the soil, the volume of scree and the amount of vertical load from it on the metering part 4 of each site changes. This vertical load is transmitted through the subsidizing part 4 to the semi-spring b, the free end of which rests on the lower side of the cutting part 3 of the platform through the slider 7. The greater the amount of scree formed on the combined platform, the greater will be the vertical loading and the more rotation of the metering part 4 due to elastic deformation half springs 6 and the movement of the slide 7, and this in turn will entail a greater collapse of the soil scree from each combined site, which will lead to a decrease in its volume on the site, reducing eniyu vertical loads on the dispensing part of the site and, by virtue of the action of forces poluressory elasticity, change the amount of rotation of the metering part of the site of the initial provisions. The design of the proposed shield operator allows continuous, almost instantaneous response, unchanging conditions of bottom stability, control of the development process of loose and unstable faces, and reduces the resistance to the implementation of the shield and more reliable and stable operation of the mechanisms for turning the dosing parts of combined sites. . The application of the proposed design will increase the performance of the shield, at the operation of the development of the soil by 15-20%.

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Claims (1)

EXECUTIVE BODY OF THE SHIELD FOR PASSING OF TUNNELS IN BULK AND LOW-RESISTANT SOILS, including but-; the ring of the ring and the combined pads located in it, each of which has a cutting and dosing part, articulated between each other, on the lower side of which there is a rotating mechanism for the dosing part, made in the form of a half-spring, the free end of which is fixed by means of a movable element, characterized in that , in order to increase the reliability in operation and reduce the resistance to the introduction of the shield into the face, the root end of the half-spring is installed by means of a block with an insert on the dosing part, while Shchen between the dispensing portion and poluressoroy and svo- g Bodnya poluressory end mounted to slide interaction midst stvom focusing. FTiS