RU2446246C2 - Method to assemble inventory low-water bridge on screw piles by span launching - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: assembly site is equipped on an entry bank for incremental assembly of a span from rolled metal products on roller assembly trolleys, than the bridge inventory property is stocked nearby, and elements of serial screw supports are stocked near water edge. A 40-ton ferry from a set of a pontoon-bridge park (PBP) is dropped on water, and a special purpose vehicle KrA3-255B (KrA3-260) is installed on the ferry from the PBP set, equipped with a fixator cartridge of screw piles, with elements of serial helical supports laid onto the ferry with an autocrane, and it is installed into the bridge range at the value equal to the rated span of the bridge from the coastal support trolley, a screw pile is inserted into a fixator cartridge with a regular weight-lifting boom of the special purpose vehicle, a detachable capstan is put on and fixed on it. A rope of a regular hoist is entered into the capstan, and a pile is screwed into soil by means of rope unreeling from the capstan, after the pile has been submerged to the design elevation, the ferry is moved on anchors across the bridge axis, and the operation is repeated with the second pile. Then the ferry is driven into the bridge axis, the weight-lifting boom of the vehicle is used to mount a crossbar and a support trolley of a serial screw support, the ferry with the pile-driving equipment is slung with a span assembled on the assembly site as a continuous system with the help of joint pads, and a boat is used to launch the bridge over one span, afterwards the ferry with the pile-driving equipment is moved into the second span, and the operation of assembly of a serial screw support and launching is repeated, the bridge is moved into the last span from the opposite bank, using the special purpose vehicle removed from the ferry, afterwards the traffic area and the breast rail are assembled manually, and exits from the bridge are arranged.

EFFECT: reduced labour inputs, higher efficiency of low-water bridges construction under wartime conditions, disasters and emergencies.

1 cl, 8 dwg

Description

The invention relates to the field of construction and can be used in the construction of low-water bridges on military roads, in emergency situations and in the elimination of natural disasters.

Known methods for the construction of low-water bridges on military roads (Manual "Military bridges on rigid supports", Military Publishing 1982, p. 121, 124 ... 125, Fig. 8.6, 8.7, 8.8), which are:

the first method - using a set of bridge-building equipment (KMC) when laying the span with a crane and feeding the structure over the bridge on cars;

the second method - with the supply of structures on the water;

the third way - laying the span with a ferry with jacks.

The second method is acceptable in the case of wooden structures.

For laying the span in a third way, the existing steam with jacks has a low load capacity.

Closest to the invention, taken as a prototype, is a method of building a low-water bridge on pile supports using KMC when laying the span with a crane and feeding the structure over the bridge on cars.

The disadvantages of this method are:

low safety of work, which leads to an increase in labor costs;

restriction on the installation of a truck crane due to the size of the bridge 3.8 ... 4.2 m, which leads to a decrease in the efficiency of construction of the bridge.

An object of the invention is to reduce labor costs and increase the efficiency of the construction of low-water bridges in wartime, natural disasters and emergency situations.

The specified technical problem is solved due to the fact that on the source shore an assembly site for the conveyor and rear assembly of the span structure from metal on roller assembly trolleys is equipped, the inventory of the bridge is stored nearby, elements of in-line screw supports are stored at the water edge, and 40 tons of water are dumped onto the water steam from a set of pontoon bridge park (PMP) and install on it a special vehicle KrAZ-255B (KrAZ-260) PMP equipped with a cartridge holder for fixing screw piles, with an element mounted on the steam with a truck crane ami in-line screw supports and put it on the bridge target by an amount equal to the estimated span of the bridge from the shore support truck, install the screw pile into the retainer cartridge with the standard lifting arrow, put on a removable capstan and fix it on it, put the cable of the standard winch into the capstan and screw the pile into the ground by winding the cable from the capstan, after immersing the pile on the design mark, the steam at anchors moves across the axis of the bridge, and the operation is repeated with the second pile, the steam is brought into the axis of the bridge, load-lifting with the arrow of the car, the nozzle and the support carriage of the in-line screw support are mounted, the steam with the pile loading equipment is slid with the span structure assembled on the assembly site using the butt pads and the boat is slid onto the bridge one span, after which the steam with the pile loading equipment is moved into the second span , and the operation of assembling the in-line screw support and slide is repeated, in the last passage the bridge is approaching from the opposite shore, by a special vehicle removed from the ferry, last which is collected by hand and I pass part railing, arrange congresses from the bridge.

The following is an illustration of the sequence of operations of the proposed method.

Figure 1. Equipment for the assembly site, installation of a shore support trolley, storage of inventory of the bridge, dumping and deployment of 40 tons of the ferry from the set of the pontoon bridge park (PMP), where are indicated:

Pos.1 - beam span of the bridge;

pos.2 - shore support trolley;

pos.3 - elements of the carriageway;

Pos. 4 - collected 40 tons of steam PMP.

Figure 2. Span assembly (beam installation), installation of a KrAZ-255B (KrAZ-260) special vehicle on a ferry with a fixed chuck, placement of in-line screw supports on a ferry and installation of a ferry in the bridge wing, where it is indicated:

Pos.5 - the assembled span of the bridge;

pos.6 - a special vehicle mounted on a ferry with details of a row screw support.

Figure 3. Assembly of the superstructure (installation of beams, butt pads and an outback), installation of a screw pile in a cartridge holder with a standard lifting boom, putting on a removable capstan and fixing it on a pile, where it is indicated:

Pos.7 - collected span;

Pos. 8 - Avantbek;

pos.9 - lifting boom;

Pos. 10 - screw pile;

Pos. 11 - cartridge holder.

Figure 4. Span assembly (installation of beams, butt pads), immersion of a screw pile with a detachable capstan and a standard winch of a special vehicle, moving the ferry across the axis of the bridge and repeating the whole operation with the second pile, where are indicated:

POS.12 - collected span;

pos.13 - detachable capstan.

Figure 5. Installation of in-line screw support elements (crossbar and roller carriage) with a standard winch of a special vehicle, where the following are indicated: pos. 14 - crossbar; pos.15 - roller trolley; Pos.16 - full-time winch of a special vehicle.

6. Slinging the ferry for the collected span and moving the ferry along the axis of the bridge with the simultaneous slide of the span one span, where are indicated:

pos.17 - elements of the sling of the ferry and the impending span;

pos.18 - the impending span of the bridge.

7. Unloading a special vehicle from a ferry, installing it on the opposite bank, sling a standard winch for the span and the final slide of the span of the bridge to the design position, where it is indicated:

pos.19 - special car on the opposite bank.

Fig. 8. The layout of the flooring boards manually or using a truck crane, the installation of a railing, the device of the entrances to the bridge, where are indicated:

pos.20 - assembled bridge;

pos.21 - congresses.

The method is carried out in the sequence shown in Fig.1-7. The specified method allows to increase the pace of construction of a low-water bridge by 2 ... 2.5 times, to reduce up to 30% the number of personnel involved in the construction of an inventory low-water bridge on screw piles on military roads.

Claims (1)

A method of assembling an inventory low-water bridge on screw piles with a superstructure slide, in which an assembly area for conveyor and rear assembly of a steel structure on roller assembly trolleys is equipped on the source shore, the inventory equipment of the bridge is stored nearby, elements of in-line screw supports are stored at the water edge, dumped a 40-ton ferry from the set of the pontoon bridge park (PMP) onto water and a special vehicle KrAZ-255B (KrAZ-260) from the PMP kit equipped with a fix cartridge is installed on the ferry a torus of screw piles, with the elements of in-line screw supports laid on a steam by a truck crane and put it on the bridge target by an amount equal to the calculated span of the bridge from the shore support trolley, with a standard load-lifting arrow of a special vehicle, insert a screw pile into the chuck, put on a removable capstan and fix it on it, a standard winch cable is inserted into the capstan and the pile is screwed into the ground by winding the cable from the capstan, after the piles are immersed at the design level, the steam is anchored across the axis of the bridge and the operation it moves with the second pile, then the steam is brought to the axis of the bridge, the crossbar and the support carriage of the in-line screw support are mounted with the lifting boom of the car, the steam with the pile-loading equipment is slid with the span structure assembled on the assembly site using the butt plates and the boat is slid onto one span, after that the steam with pile driving equipment is moved to the second span and the operation of assembling the in-line screw support and slide is repeated, the bridge is pushed into the last span with of the opposite shore by a special vehicle removed from the ferry, after which the roadway and railings are manually assembled and ramps are made from the bridge.

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