BG64487B1 - Method for correction of the position of a slab structure made of prefabricated components - Google Patents

Abstract

The method is employed for the correction of the position of a slab structure made of prefabricated concrete components (1), especially of a solid surfacing for high speed transport vehicles wherein the finished components (1) are supported by a lower layer of a solidifying poured mortar (4) and supporting layer (5) of the foundation. To correct the position of at least one slab of prefabricated components (1) the concrete slab, made of prefabricated parts (1) is separated at least partially from the lower layer, especially from the poured material of the base (4) and/or the supporting layer(5) after which it is finely adjusted and is then again poured with pouring material (4). The method comprises a device with a cutting device (21, 22) which is fitted over the concrete slab made of prefabricated parts (1) or on the succeeding one.

Description

Technical field

The invention relates to a method for correcting the position of the structure of a slab of precast concrete parts, in particular a rigid roadway for high-speed vehicles, whereby a hardened mass is cast beneath the finished parts and carried by the bearing layer of the base.

BACKGROUND OF THE INVENTION

Known structures of precast concrete slabs are used, inter alia, as a rigid roadway for high-speed vehicles. In doing so, high-speed vehicles run on rails. In order to ensure trouble-free and comfortable operation of the high-speed lane, it is necessary that the rails and plates below them are placed very precisely in terms of height and lateral position. The adjustment of the position of the rails is usually carried out by means of known rail fastening systems and by placing intermediate elements of different thickness under the rails. This compensates for differences in the track position in the order of about 30 mm. The disadvantage here is that the larger adjustments that are made when the base sinks cannot be made in this way, as larger corrective movements are often required.

SUMMARY OF THE INVENTION

The technical problem that the invention is to solve is to allow the position of the construction of a slab of precast concrete parts to be adjusted, which requires a higher height adjustment.

This technical problem is addressed by the features of the claims. The proposed method according to the invention corrects the position of the construction of a slab of ready-made concrete details, especially on a rigid roadway for high-speed vehicles. The concrete slab structure consists of two prefabricated slabs connected to each other, with a layer of curing casting material deposited under the slabs and supported by a support layer on the base. To correct at least one plate of finished parts or part thereof, the plate is completely or partially separated from the deposited layer and / or the carrier layer, then fine-tuned and backfilled with a casting base. In this way, high-altitude adjustments can be made. The separation may be carried out by chemical or mechanical means. The most advantageous method depends on the environmental conditions and the material of the fill.

If the bottom layer, especially the casting mass and / or the supporting layer, is cut in the longitudinal and / or transverse direction of the plate from finished details, then a very simple form of plate separation is used. The choice of whether the bottom layer should be cut in a longitudinal or transverse direction depends on the type of slab collapse, the tools available and the environmental conditions.

If the casting mass is cut at or near the contact points of the slab and / or the support layer, then a good re-insertion of the new fill on the substrate base with the finished plate must be ensured.

If a hole is made in the lower layer of the casting table before cutting the lower layer, especially the casting mixture, to place a cutting tool, such as a circular saw, then it is not necessary to separate the plate before beginning the cutting.

If the dividing line has a length that is not equal to the length of the pre-fabricated plate, especially if it does not begin or end in the frontal connection of two pre-fabricated plates, then the possible weak point of the front joining of the plates is avoided.

If openings or openings are used on the finished part plate and used for a new base fill, then the new casting is greatly facilitated. It is possible to fill the table mainly without air intakes.

It is especially advantageous to open the fill openings that are filled with the old fill and used for the new fill.

If the plate is adjusted with the mechanical or hydraulic lifting devices that are mounted in the plate, such as a spindle, then the plate setting is usually carried out with the means often found in the plate from the initial setting.

In order to avoid damaging the spindle when cutting the layer, it is advisable to remove the spindle from the section of the section before starting the cutting and only to return to its place after the cutting.

In order to quickly recover the movement on the concrete slabs, it is advantageous to pour the slabs from below with a particularly fast-hardening bitumen cement mortar, plastic or cement mortar.

For carrying out the method, a device according to the invention is used, which has a detachable separating device, in particular for cutting the lower layer, especially the lower layer of casting mass below the concrete slab of finished rigid track for high-speed rail vehicles. A rigid roadway consists of at least one first and one second bonded reinforced concrete slab of finished parts. The cutting device is placed on the concrete slab to be separated or adjacent, preferably on rails.

The method also uses another device according to the invention, which has a cutting device for separating at least one part of the concrete slab on a rigid lane for rail high-speed vehicles from its lower layer. The cutting device shall be mounted on a guide independent of the concrete slab to be removed, in particular on an additional rail. Solid roadways generally have two rails so that the cutting device can move on an additional rail to separate the required portion of the lane.

If the cutting device performs a longitudinal movement of the concrete slab at the knot itself, a relatively long distance can be traversed by the rigidly mounted base of the cutting device during which the cut is made.

A favorable way is to move the cutting device and / or assembly on the rail. In this way, an accurate cut is possible.

If the assembly is fixed to the rail, especially tightened, then it is possible to quickly change the extension section.

Explanation of the annexed figures

The invention is illustrated by the following in dimensional embodiments and the accompanying figures, of which:

Figure 1 is a top plan view of a finished concrete slab;

Figure 2 is a cross-sectional view through the arrangement of the arrangement of a concrete slab of finished parts;

Figure 3 is a section through a layer of casting mass;

Figure 4 - lifting of concrete slab from finished details;

Figure 5 - Filling the space between the concrete slab of finished parts and the bearing layer;

6 is an embodiment of a rope-driven cutting belt.

Examples of carrying out the invention

Figure 1 shows a top plan view of a precast concrete slab 1. The precast concrete slab 1 has a plurality of individual ridges on which rails are fastened 2. The rail fastening, which can be carried out in various known shapes, allows for some adjustment of rails in vertical and horizontal directions. If this adjustment capability is not sufficient, for example, due to the subsidence of the foundation, the concrete slab of the finished workpiece 1 itself must be adjusted in height. For this purpose, spindles 7 are provided in six embodiments in this embodiment, which serve to adjust plate 1. The spindles 7 provided at the edges of plate 1 and here also in the middle of plate 1 allow fine adjustment of the plate. plate 1 by more or less developing the spindle 7. These spindles 7, which are typically mounted when inserting plate 1, receive a second task through this invention, allowing for the correction of a plate already installed. The spindles 7 are located in the recesses of plate 1.

Figure 2 shows a cross-section through the construction of the concrete slab of finished parts 1 and its location. On the bearing layer 5 and the intermediate layer of casting 4 there is a concrete slab of finished parts 1. The bearing layer may be, for example, hydraulically connected or asphalt or other suitable bearing layer. The bottom fill 4 firmly connects the concrete slab of finished parts 1 to the supporting layer 5. A spindle 7 which serves to adjust the concrete slab of finished details 1 at the first installation is presented in a tightened state, since it has no supporting function at the final mounting plate 1. It is inserted into the recess of the seal 4 so that it can be maintained afterwards.

For the correction of the concrete slab of the finished parts 1 according to Figure 3, the lower layer of casting is cut 4. Thus, the concrete plate 1, after cutting the lower layer 4, becomes movable in a vertical direction within its connections in the structure. It is particularly advantageous when shearing in the lower layer 4 is made directly to the point of separation of the concrete slab 1. This significantly improves the reliable bonding of the later poured layer 4 with the concrete plate 1. The old layer connecting the lower poured layer 4 with the concrete slab 1 is thus released from the supporting function and connected to the new layer. It may also be advantageous to make the separation section at the point of connection between the carrier layer 5 and the fill 4 under the plate. And in this way, any loose connection can be restored. Separation at or near the joint between the reinforced concrete slab 1 and the casting below it 4 is the easiest to perform, since at a certain thickness of the concrete slab 1, this location can easily be covered by the control and cut. Because the thickness of the fill 4 under the plate may be different, this connection site can easily be defined as the connection site with the hydraulically connected carrier layer 5.

If the concrete slab 1 is to sink down, then a parallelepiped piece of fill 4 is cut and the concrete slab 1 is lowered into the open space.

Figure 4 shows the lifting of the concrete slab 1. By winding the spindle 7 inwards and the corresponding fine-tuning of the concrete slab 1, the concrete slab 1 is lifted relative to the base. This increases the distance.

In Figure 5, the concrete slab 1 is again poured below. The fill 4 has hardened so that the spindle 7 can be unloaded again.

Figure 6 shows the arrangement of the cutting device on the concrete slab 1. The cutting device, which may be a circular saw, driven by a rope, an oxygen cutter or the like, is placed on a movable carriage 21. The carriage 21 is drawn by a rope hoist above the place where the concrete slab must be cut 1. The rope winch or rope is fixed at one point as a support. Preferably, the support is located on the adjacent concrete slab 1. The rail 2 mounted on the reinforced concrete slab 1. The rail 2 can also serve to secure the support. Preferably, the support is secured to the rail 2 and, after using the maximum displacement of the sled 21, can be moved to continue the separation shear.

For faster curing of the new poured layer, especially at freezing temperatures, it may be advantageous when the pre-casting material or slit is preheated. To create a good bond with the new fill material, it is also advantageous to clean the gap before filling with high pressure air. A slot can also be made in the carrier layer if the new fill material under the slab is designed to create a good bond with this material.

The invention can also be applied when replacing complete concrete slabs of finished parts. The plates are then removed from the concrete structure and a replacement plate is then inserted.

Claims (25)

1. A method for adjusting the position of the construction of precast concrete slabs (1), in particular on a rigid roadway for high-speed vehicles, in which the finished concrete slabs (1) have spindles (7) and are supported by a lower a layer of curing casting mass (4) and a support layer (5) on the base, characterized in that to adjust the position of at least one plate of finished parts (1), the plate of finished parts (1) is separated partially from the bottom layer, especially from the casting mass (4) under the slab and / or the support layer (5) and during The spindles (7) are removed from the scope of the split section, after which the spindles (7) are returned to their supporting position, and then the fine concrete slab of finished parts (1) is fine-tuned by means of the spindles (7) and again poured from below. with pouring mixture (4). Method according to claim 1, characterized in that the lower layer, especially the casting mass (4), is partially cut. Method according to one of the preceding claims, characterized in that the lower layer, in particular the casting mass (4), is cut in the longitudinal and / or transverse direction of the finished part plate (1). Method according to any one of the preceding claims, characterized in that the casting mass (4) is cut primarily at or near the point of contact with the reinforced concrete slab of finished parts (1) and / or the bearing layer (5). Method according to one of the preceding claims, characterized in that the lower layer, especially the casting mass (4), is cut at least along the entire width of the reinforced concrete slab from finished parts (1). Method according to one of the preceding claims, characterized in that, before cutting the lower layer, in particular the casting mass (4), an opening is made at the base, in particular in the casting mass (4), for introducing the cutting device , in particular the circular saw. Method according to one of the preceding claims, characterized in that the section has a length which is different from the length of one reinforced concrete slab of finished parts (1), in particular not beginning and ending at the junction of two reinforced concrete slabs of finished parts (1). Method according to one of the preceding claims, characterized in that the pouring holes (9) are opened or made on the reinforced concrete slab of finished parts (1) and used for new casting from below. Method according to one of the preceding claims, characterized in that the pouring openings clogged with the pouring mass (4) are opened and used for new pouring. Method according to one of the preceding claims, characterized in that the reinforced concrete plate of finished parts (1) is fine-tuned with the mechanical and hydraulic lifting devices mounted in the reinforced concrete plate of finished parts (1) and / or mounted outside thereof. like spindles (7). Method according to one of the preceding claims, characterized in that the reinforced concrete slab of finished parts (1) is poured below with a particularly fast-hardening bitumen cement mortar, artificial material or cement mortar. Method according to one of the preceding claims, characterized in that the lower layer, especially the casting mass (4), is cut with a saw, in particular a rope-driven (20), a knife-shaped or a circular saw. Method according to one of the preceding claims, characterized in that the lower layer, in particular the casting mass (4), is cut with an oxygen cutter. Method according to one of the preceding claims, characterized in that the lower layer, in particular the casting mass (4), is cut with a high pressure water jet. 15. Method according to one of the preceding claims, characterized in that the incision in the lower layer is cleaned before a new casting. Method according to one of the preceding claims, characterized in that, for faster connection of the pouring mass (4), the pouring points are heated. Method according to one of the preceding claims, characterized in that the complete reinforced concrete slab of finished parts (1) is removed from the structure and replaced with another. Method according to one of the preceding claims, characterized in that at least one part of the reinforced concrete slab from finished parts (1) is separated on a rigid lane for rail high-speed vehicles from its base, especially when positioning is corrected a cutter device (20, 21) is used which is disposed on the precast concrete slab (1) to be separated or adjacent to it. Method according to one of the preceding claims, characterized in that the device used with the cutting device (20,21) is arranged on a guide independent of the reinforced concrete slab of finished parts (1), which must be removed, in particular additional rail. Method according to one of the preceding claims, characterized in that the cutting device (20,21) cuts the lower layer, in particular the fill (4), which is located below the reinforced concrete slab of finished parts (1). Method according to one of the preceding claims, characterized in that the reinforced concrete slabs of finished parts (1) are bonded to each other. Method according to one of the preceding claims, characterized in that the cutting device (20) is disposed on the rail (2) of the first or second reinforced concrete slab of finished parts (1). Method according to one of the preceding claims, characterized in that the cutting device (20), which is part of the assembly (20, 21) and within the assembly (20,21), performs a longitudinal course of the reinforced concrete slab from finished parts (1). 24, A method according to one of the preceding claims, characterized in that the cutting device (20) and / or assembly (20,21) are guided on the rail (2). A method according to one of the preceding claims, characterized in that the assembly (20, 21) is stationary on the rail (2), in particular it is tightened.