RU189266U1 - INTERMEDIATE PUMP AND TUMPER SUPPORT OF UNDERWATER AUTOMOBILE TRAIL BRIDGE (PARM) - Google Patents

Abstract

The utility model relates to the field of bridge construction, namely, the device of temporary underwater road collapsible bridges built on military roads. The technical task of the PM is to develop such a construction of an intermediate support of an underwater road collapsible bridge that will ensure reliability and stability of the pylon and the bridge as a whole during erosion bottom soil under the shoes, as well as to simplify the installation of screw piles in working position before screwing into the ground. This technical problem is solved due to the fact that the intermediate pile-shoe support of an underwater road collapsible bridge consists of a bolt, two racks, two screw piles, characterized in that the bolt is supported on supporting swivel cups placed under the ends of the bolt on the racks and the piles of supports and having through holes for bearing pins. At both ends of the bolt, there are cutouts through the entire thickness of the bolt from the ends of the bolt to the nests into which the pile trunks lead before they are screwed into the ground, and in the shoes coaxially with the nests are arranged through the blades of the piles when they are screwed. All elements of the support are made of carbon fiber, and the trunks of the pillars and piles are made of pipes, having through-holes in height, into which the bearing pins are inserted after screwing in the piles.

Description

The utility model (hereinafter referred to as PM) relates to the field of bridge construction, in particular, to the construction of temporary underwater road collapsible bridges built on military motor roads.

The known design of the intermediate support type IV bridge small spans (MMP), consisting of a bolt, two racks and two shoes [1].

Also known support "Collapsible trestle" (copyright certificate №989914 per. 09/14/1982), which consists of a bolt, two screw piles, two poles and two shoes, which are arranged through the glasses for free passage of the blades at screwing them into the ground [2].

This support is adopted for the prototype PM.

The design flaws of the prototype are the following:

1. The location of the screw piles between the uprights, which necessitates the placement of the top of the pile trunks in the transom before the support is installed in the design position. This creates certain difficulties in the preparation of the support for the installation and the installation itself in the design position.

2. Making racks of two channels, interconnected by vertical sheets, which are located inside the racks, their welding to the channels is difficult.

3. The presence of square brackets on both sides of brackets for supporting the bolt, which are fastened to the racks with bolts, as well as the use of special flat gaskets, which are used for precise adjustment of the height of the bolt and placed on horizontal shelves of brackets. All this is quite laborious and will require a long time for divers to work underwater.

4. The absence of support rollers on the crossbars does not allow the sliding of the assembled span structures.

5. Significant weight and high corrosion of the support elements, since they are all made of steel.

The technical task of the PM is to develop such a construction of an intermediate support for an underwater road collapsible bridge, which will ensure the reliability and stability of the support and the bridge as a whole during erosion of the bottom soil under the shoes, as well as to simplify the installation of screw piles into the working position before screwing them into the ground.

This technical problem is solved due to the fact that the intermediate pile-shoe support of the underwater road collapsible bridge consists of a bolt, two racks, two screw piles, differs in that the bolt is supported on supporting swivel cups placed under the ends of the bolt on racks and piles of supports and having through holes for bearing pins. At both ends of the bolt, there are cutouts through the entire thickness of the bolt from the ends of the bolt to the nests into which the pile trunks lead before they are screwed into the ground, and in the shoes coaxially with the nests are arranged through the blades of the piles when they are screwed. All elements of the support are made of carbon fiber, and the trunks of the pillars and piles are made of pipes, having through-holes in height, into which the bearing pins are inserted after screwing in the piles.

The utility model is illustrated in the figure, where indicated:

FIG. 1 - general (main) type of support; FIG. 2 - view of the support on the facade of the bridge; FIG. 3 - view of the support from above; FIG. 4 - top view of the shoe; FIG. 5 is a view of the shoe across the axis of the bridge; FIG. 6 is a view of the shoe along the axis of the bridge; pos. 1 - span structure; pos. 2 - support bolt; pos. 3 - shoe; pos. 4 - track roller; pos. 5 - vertical guide roller; pos. 6 - holder of axles of road wheels; pos. 7 - pin-latch position of the superstructure on the support; pos. 8 - stand support; pos. 9 - screw pile; pos. 10 - supporting swivel cup; pos. 11 - bearing pin; pos. 12 - heel rack; pos. 13 - the cross; pos. 14 - guiding pile glass; pos. 15 - stiffeners shoe; pos. 16 - a rotary lock of a nest of a pile; pos. 17 - connecting plate; pos. 18 - cutout in the bolt; DUM - level of low waters; the vertical arrows in FIG. 5 and FIG. 6 shows the possible positions of the shoe relative to the rack 8.

The proposed PM is manufactured and implemented in the following sequence.

Production of all elements of the support is made of carbon fiber in the workshop conditions. CFRP is known to have a lower specific weight and increased corrosion resistance than steel. These qualities are very important for the support of the underwater bridge, which will be constantly in the water.

The shop produces a reinforced (enlarged) assembly of the crossbar 2 of the support, in which elements 4, 5, 6, 7 and 16 are placed and fixed at the top of the crossbar (Figs. 1, 2 and 3). Here round posts 8 are rigidly connected with heels 12, for example, with a pin (not shown in the figure). The length of the section of the rack 8 should be no more than 1.5-1.7 m. The following sections should be of different lengths with a step of 0.5 m from 1 m to 3 m. This will allow you to make racks in height so that their top is in water.

The distance between the holes in height on the trunks of the pile 9 and racks 8, as well as the diameter of the bearing pins, is determined by calculations depending on the design capacity of the bridge (span structures).

At the heels 12, during their manufacture, crosses (hinges) 13 should be placed, which provide the shoes 3 with two degrees of freedom, which allows mounting the shoes 3 on bottom soils having longitudinal or transverse slopes up to 30 ° relative to the horizon (Fig. 5 and 6).

The final assembly of the support is carried out on the pier near the bridge. Here, the workers fit on the trunks of the pillars 8 supporting glasses 10 and fix them under the bottom of the bolt 2 pins at a height close to the calculated mark. Then the crane bolt 2 rises up, lowers onto the pillars 8, which are previously fixed with the lanyards in the vertical position (not shown in the figure). Mounting pins are inserted into the holes in the trunks of the uprights 8 on top of the crossbar, which hold up the posts 8 with the shoes 3 when the crane moves the crane from the pier to the steam and during the lowering of the ground support to the design position on the axle of the bridge (Fig. 1).

Delivery of support to the place of installation is carried out on the ram on which the crane is placed. Crane support is lowered into the design position on the shoes, which, when the device bridge can be used for dual purpose. On solid soils, they can serve as surface foundations that transfer the load to the bottom soils. If the ground is weak, then the shoes are used only for the time of pile driving with the 9 pile driving installation (UZS). In such cases, the support cups 10 raise the divers along the trunks of the uprights 8 up to the stop into the crossbar 2. The bearing pins 11 are inserted into the aligned holes in the glasses 10 and the uprights 8. The mounting pins that were in the uprights 8 above the crossbar 2 are removed. An end of the superstructure 1 is installed on the support by a crane placed on the ram. Its position on the two supports is fixed by pins 7. It connects to the previous superstructure by overlays 17.

If the bottom soils are weak, then screw piles 9 are used. To do this, the trunks of the piles 9 lead with a crane into the slots from the ends of the bolt 2 and the rotary locks 16 fix their position. After that, the blade part of the pile is lowered onto the ground through the guide cups 14 arranged on the shoes 3. The installation of screwing in piles (UZS) [3] enters the superstructure. Produced screwing piles 9 one or two at a time. After the piles have reached the 9 design marks, the support cups 10 raise along the trunks of the piles 9 as far as the stop into the bolt 2. Turning the cups 10 align the holes in the trunks of the piles 9 with the holes in the cups 10. The same pins 11 are inserted into the trunks 8 is allowed not to delete.

Now all the load from the bolt 2 is transferred to the screw piles 9 through the pins 11.

Such is the brief description of the technology of installation and installation from the water using the crane of the Parm-and-Pile support.

It is clear that another technology can be used. For example, longitudinal sliding of spans or installing them using pontoons ("surfacing") due to filling the pontoons with water and pumping it out.

Thus, the proposed PM ensures the reliability and stability of the support, including during the undermining of the shoes. In addition, due to the use of carbon fiber, not only the weight of the support and the bridge as a whole is reduced, but also the corrosivity of the support elements when it is in the water. Reduced electronic visibility of the support and the entire bridge. As a result, the enemy will need more time to detect the bridge and, as a result, the periods of bridge operation will increase, which will increase the volume of transported cargo.

Used sources

1. Bridge of small spans. Technical description and instruction manual. M: Voenizdat.2002

2. Collapsible overpass. Copyright certificate №989914 (per. 09/14/1982 G)

3. A rotary basic glass of a pile-screw grillage of a road collapsible bridge. Patent for useful model №165498 (per. 3.10.2016)

Claims (2)

1. Intermediate pile-shoe support of an underwater road collapsible bridge, consisting of a bolt, two poles, two shoes and two screw piles, characterized in that the bolt is supported on supporting swivel cups placed under the ends of the bolt on poles and piles and having through holes for the bearing pins, and at both ends of the bolt, cutouts are made through the entire thickness of the bolt from the ends of the bolt to the nests into which piles are driven before they are screwed into the ground, besides, in the shoes coaxially with the sockets Razny guides glasses for the passage of the blades of the piles when they are screwed. 2. Bearing under item 1, characterized in that all its elements are made of carbon fiber, and the trunks of the piles and racks are made of pipes, having through-holes in height, into which the bearing pins are inserted after screwing the piles.

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