RU2277143C1 - Method for low-level bridge erection - Google Patents

Abstract

FIELD: building, particularly to construct low-lever military roadway bridge.

SUBSTANCE: method involves deploying bridge construction means; driving intermediate support piles; erecting land pier and arranging bridge access ramp. Truck-mounted crane is installed on near bank and adapted to move metal baulks or baulk set provided with guiding means to the first bridge span. Metal baulks having guiding means are supplied to the second and next metal spans by ferry boat included in bridge construction means. Then truck-mounted crane lays reinforced concrete panels on metal baulks provided with guiding means and adapted for reinforced concrete movement from the first span to the last one with the use of car equipped with winch. The car with winch is arranged on opposite bank.

EFFECT: reduced labor inputs and increased bridge construction speed in time of war, natural hazards and emergency situation.

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Description

The invention relates to the field of construction and can be used in the construction of low-water bridges on military roads.

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:

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

with the supply of structures on water afloat;

span laying by ferry with jacks.

The last two methods are acceptable in the case of wooden structures, and reinforced concrete slabs have a mass of 4 ... 5 tons and cannot be fed afloat. For laying the span in the third way, the existing steam with jacks has a low carrying capacity, and therefore, concrete reinforced concrete slabs weighing 4 ... 5 tons cannot be fed into the bridge span, this requires a special steam with increased carrying capacity.

Closest to the invention is a method of constructing a low-water bridge on pile supports using KMS when laying the span with an automobile crane and feeding the structure along the bridge on cars.

The disadvantages of this method are:

low safety of work, which leads to increased 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 a low-water bridge in wartime, natural disasters and emergency situations.

The specified technical problem is solved due to the fact that a crane is installed on the source bank, which is fed with metal girders (run block) with guides in the first bridge span, in the second and subsequent spans metal runs with guides are fed with a ferry from a set of bridge-building equipment, then with the same crane they lay reinforced concrete slabs on metal girders with guides along which reinforced concrete slabs are pushed from the first to the last span using a car with a winch installed and the opposite shore.

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

figure 1 - deployment of CCM and the implementation of driving piles of intermediate supports;

figure 2 - the construction of the coastal support on the source shore and the device of entry to the bridge;

figure 3 - laying a truck crane metal girder (run blocks) with guides in the first span of the bridge;

figure 4 - the supply and installation of metal runs with guiding steam KMS in the second and subsequent spans of the bridge;

figure 5 - laying of concrete slabs on a metal run with guides in the first span of the bridge;

6 is a slide of reinforced concrete slabs along the guides from the first to the last span using a car with a winch mounted on the opposite bank.

Figure 1 marked:

1 - CCM;

2 - pile;

3. - water barrier.

Figure 2 marked:

4 - entrance to the bridge;

5 - coastal support.

Figure 3 marked:

6 - automobile crane;

7 - metal run with guides.

In figure 4 are indicated:

8 - CCM ferry;

Figure 5 marked:

9 - reinforced concrete slab;

10 - guides.

Figure 6 marked:

11 - a car with a winch.

The method is carried out in the sequence shown in figures 1-6.

The specified method of laying reinforced concrete slabs increases the reliability of the span by 20 ... 30%, the pace of construction of a low-water bridge by 1.2 ... 1.5 times, reduces by 15 ... 20% the number of personnel involved in the construction of a low-water bridge on military roads.

Claims (1)

A method of erecting a low-water bridge, in which a set of bridge-building equipment is deployed, the piles of the intermediate support are driven, the shore support is erected and the bridge is approached, characterized in that a mobile crane is installed on the original shore, which serves metal girders or a block of girders with guides in the first bridge span , in the second and subsequent flights, metal runs with rails are fed with a ferry from a set of bridge-building equipment, then reinforced concrete plates are laid with the same crane you're on the metal purlins with the guides on which the reinforced concrete slabs slid from first to last flight with the help of a car with a winch mounted on the opposite bank.

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