Cross-line gantry precast block foundation structure

Abstract

The utility model discloses an overline gantry precast block foundation structure which comprises an L-shaped end precast foundation block, an inverted L-shaped end precast foundation block, a plurality of Z-shaped middle precast foundation blocks, a fixed end sealing anchor device, a tensioning end sealing anchor device and a plurality of prestressed steel strands. The multiple Z-shaped middle prefabricated foundation blocks are sequentially spliced between the L-shaped end prefabricated foundation block and the inverted-L-shaped end prefabricated foundation block, and the left end face of the L-shaped end prefabricated foundation block and the right end face of the inverted-L-shaped end prefabricated foundation block are provided with a fixed end sealing anchor device and a tensioning end sealing anchor device correspondingly. A plurality of tensioning holes are formed between the fixed end anchor sealing anchorage device and the tensioning end anchor sealing anchorage device, each prestressed steel strand is arranged in the corresponding tensioning hole in a penetrating mode, and the two ends of each prestressed steel strand are connected to the fixed end anchor sealing anchorage device and the tensioning end anchor sealing anchorage device. The prefabricated foundation blocks are assembled on site after being prefabricated, the prestressed steel strands are adopted for prestressed anchoring connection, the structure is stable, and the bearing capacity is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of overline gantry track foundation construction, in particular to an overline gantry prefabricated block foundation structure. BACKGROUND

[0002] The overline gantry foundation is generally single-layer or double-layer strip-shaped enlarged foundation, the traditional overline gantry foundation is adjacent to the red line range of the main line in one side, and is far away from the red line in the other side. During construction, the track foundation adjacent to the red line range of the main line is limited by the red line land, and the construction has the disadvantages of long land procedure, crossing with the main line structure construction and other aspects affecting the construction progress, so the foundation construction progress directly affects the construction progress of the overline gantry installation on the construction site. UTILITY MODEL CONTENTS

[0003] The utility model wants to solve the technical problem to provide an overline gantry prefabricated block foundation structure, and the prefabricated block is assembled on site, and prestressed steel strand is used for prestressed anchoring connection, so that the structure is stable, and the bearing capacity is strong.

[0004] The technical scheme of the utility model provides:

[0005] An overline gantry prefabricated block foundation structure, comprising a plurality of prefabricated foundation blocks, a fixed end sealing anchor anchor device, a tensioning end sealing anchor anchor device and a plurality of prestressed steel strands, the plurality of prefabricated foundation blocks comprise L-shaped end prefabricated foundation blocks, inverted L-shaped end prefabricated foundation blocks and a plurality of Z-shaped middle prefabricated foundation blocks, the inner walls of the vertical parts of the L-shaped end prefabricated foundation blocks and the inverted L-shaped end prefabricated foundation blocks are opposite, the plurality of Z-shaped middle prefabricated foundation blocks are sequentially spliced between the L-shaped end prefabricated foundation blocks and the inverted L-shaped end prefabricated foundation blocks, and a complete prefabricated block foundation is obtained by splicing, the upper horizontal part of the leftmost Z-shaped middle prefabricated foundation block is inserted into the L-shaped gap of the L-shaped end prefabricated foundation block, the lower horizontal part of the rightmost Z-shaped middle prefabricated foundation block is inserted into the L-shaped gap of the inverted L-shaped end prefabricated foundation block, and when two adjacent Z-shaped middle prefabricated foundation blocks are spliced, the lower horizontal part of the left Z-shaped middle prefabricated foundation block is inserted into the position directly below the upper horizontal part of the right Z-shaped middle prefabricated foundation block.

[0006] The left end face of the L-shaped end prefabricated foundation block and the right end face of the inverted L-shaped end prefabricated foundation block are respectively provided with a fixed end sealing anchor mouth and a tensioning end sealing anchor mouth, a plurality of parallel tensioning holes are arranged between the fixed end sealing anchor mouth and the tensioning end sealing anchor mouth on the complete prefabricated block foundation, the two ends of each tensioning hole are respectively communicated with the fixed end sealing anchor mouth and the tensioning end sealing anchor mouth, the fixed end sealing anchor anchor device is arranged in the fixed end sealing anchor mouth, the tensioning end sealing anchor anchor device is arranged in the tensioning end sealing anchor mouth, and the plurality of prestressed steel strands are respectively arranged in the plurality of tensioning holes and fixedly connected to the fixed end sealing anchor anchor device and the tensioning end sealing anchor anchor device.

[0007] The L-shaped end prefabricated foundation block, the inverted L-shaped end prefabricated foundation block and the plurality of Z-shaped middle prefabricated foundation blocks are all reinforced concrete prefabricated foundation blocks.

[0008] The three parallel tension holes are arranged between the fixed end sealing anchor and the tension end sealing anchor, two of the tension holes are arranged at the same horizontal height, and the other tension hole is arranged at a horizontal height higher than that of the two tension holes, and the sequentially connected lines of the three tension holes form an isosceles triangle.

[0009] When the leftmost Z-shaped middle prefabricated foundation block is spliced with the L-shaped end prefabricated foundation block, a gap is left between the top surface of the horizontal part of the L-shaped end prefabricated foundation block and the bottom surface of the horizontal part of the Z-shaped middle prefabricated foundation block, and the gap is filled with a leveling layer; when the rightmost Z-shaped middle prefabricated foundation block is spliced with the inverted L-shaped end prefabricated foundation block, a gap is left between the bottom surface of the horizontal part of the inverted L-shaped end prefabricated foundation block and the top surface of the horizontal part of the Z-shaped middle prefabricated foundation block, and the gap is filled with a leveling layer; when two adjacent Z-shaped middle prefabricated foundation blocks are spliced with each other, a gap is left between the bottom surface of the horizontal part of the left Z-shaped middle prefabricated foundation block and the top surface of the horizontal part of the right Z-shaped middle prefabricated foundation block, and the gap is filled with a leveling layer.

[0010] The lengths of the portions, where the two ends of the plurality of prestressed steel strands extend to the outside of the fixed end sealing anchor and the tension end sealing anchor, are all 3-4 cm.

[0011] The prefabricated foundation block of the utility model has the following advantages:

[0012] (1) The prefabricated foundation block comprises L-shaped end prefabricated foundation blocks, inverted L-shaped end prefabricated foundation blocks and a plurality of Z-shaped middle prefabricated foundation blocks, the L-shaped end prefabricated foundation blocks, the plurality of Z-shaped middle prefabricated foundation blocks and the inverted L-shaped end prefabricated foundation blocks are prefabricated in a factory, are sequentially arranged and closely spliced at a construction site, the construction time at the site is greatly reduced, the construction progress is improved, the prefabricated structure is fully utilized in the factory, and the influence of later main line structure cross construction is avoided.

[0013] (2) When the adjacent prefabricated foundation blocks are spliced, a gap is left at the splicing position, and a leveling layer is filled in the gap, so that the problem of height difference between upper and lower surfaces during prefabrication construction is eliminated.

[0014] (3) The prefabricated foundation block is connected by the prestressed system, can be quickly installed and put into use without being affected by the construction period and the environment, has stable structure, strong bearing capacity, can be used for turnover construction and can save construction cost. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is the main view after the prefabricated foundation block is spliced.

[0016] Figure 2 is Figure 1 A part of the enlarged view in the figure.

[0017] Figure 3 is the left side view after the prefabricated foundation block is spliced.

[0018] Reference signs: 1-L type end prefabricated foundation block, 2-inverted L type end prefabricated foundation block, 3-Z type middle prefabricated foundation block, 4-river sand leveling layer, 5-fixed end sealing anchor mouth, 6-tensioning end sealing anchor mouth, 7-tensioning hole. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0020] See Figures 1-3The application relates to a cross-line gantry prefabricated block foundation structure, which comprises eight prefabricated blocks, a fixed-end sealing anchor anchorage device, a tensioning-end sealing anchor anchorage device and three prestressed steel strands. The eight prefabricated blocks comprise L-shaped end prefabricated blocks 1, inverted L-shaped end prefabricated blocks 2 and six Z-shaped middle prefabricated blocks 3, wherein the L-shaped end prefabricated blocks 1, the inverted L-shaped end prefabricated blocks 2 and the six Z-shaped middle prefabricated blocks 3 are all reinforced concrete prefabricated blocks, the inner walls of the vertical parts of the L-shaped end prefabricated blocks 1 and the inverted L-shaped end prefabricated blocks 2 are opposite to each other, the six Z-shaped middle prefabricated blocks 3 are sequentially spliced between the L-shaped end prefabricated blocks 1 and the inverted L-shaped end prefabricated blocks 2, and the complete prefabricated block foundation is obtained by splicing. When the leftmost Z-shaped middle prefabricated block 3 is spliced with the L-shaped end prefabricated block 1, the upper horizontal part of the leftmost Z-shaped middle prefabricated block 3 is inserted into the L-shaped gap of the L-shaped end prefabricated block 1, a gap is left between the top surface of the horizontal part of the L-shaped end prefabricated block 1 and the bottom surface of the upper horizontal part of the Z-shaped middle prefabricated block 3, and a river sand leveling layer 4 is filled in the gap. When the rightmost Z-shaped middle prefabricated block 3 is spliced with the inverted L-shaped end prefabricated block 2, the lower horizontal part of the rightmost Z-shaped middle prefabricated block 3 is inserted into the L-shaped gap of the inverted L-shaped end prefabricated block 2, a gap is left between the bottom surface of the horizontal part of the inverted L-shaped end prefabricated block 2 and the top surface of the lower horizontal part of the Z-shaped middle prefabricated block 3, and the river sand leveling layer 4 is filled in the gap. When two adjacent Z-shaped middle prefabricated blocks 3 are spliced, the lower horizontal part of the left Z-shaped middle prefabricated block is inserted into the position directly below the upper horizontal part of the right Z-shaped middle prefabricated block, a gap is left between the bottom surface of the lower horizontal part of the left Z-shaped middle prefabricated block and the top surface of the upper horizontal part of the right Z-shaped middle prefabricated block, and the river sand leveling layer 4 is filled in the gap.

[0021] The left end surface of the L-shaped end prefabricated block 1 and the right end surface of the inverted L-shaped end prefabricated block 2 are respectively provided with a fixed-end sealing anchor opening 5 and a tensioning-end sealing anchor opening 6. Three tensioning holes 7 are arranged on the complete prefabricated block foundation between the fixed-end sealing anchor opening 5 and the tensioning-end sealing anchor opening 6, wherein two tensioning holes are arranged at the same horizontal height, and the other tensioning hole is arranged at a horizontal height higher than that of the two tensioning holes, and the sequentially connected lines of the three tensioning holes 7 form an isosceles triangle. The two ends of each tensioning hole 7 are respectively communicated with the fixed-end sealing anchor opening 5 and the tensioning-end sealing anchor opening 6. The fixed-end sealing anchor anchorage device is arranged in the fixed-end sealing anchor opening 5, the tensioning-end sealing anchor anchorage device is arranged in the tensioning-end sealing anchor opening 6, the three prestressed steel strands are respectively arranged in the three tensioning holes 7 and fixed to the fixed-end sealing anchor anchorage device at the fixed end and to the tensioning-end sealing anchor anchorage device at the tensioning end, and the lengths of the portions of the two ends of the three prestressed steel strands extending to the outside of the fixed-end sealing anchor anchorage device and the tensioning-end sealing anchor anchorage device are all 3-4 cm.

[0022] The construction steps are specifically as follows:

[0023] (1), in the base treatment of the cross-line gantry foundation bottom area;

[0024] (2), in a flat area prefabricated foundation block prefabrication and maintenance until the prefabricated foundation block reaches the design strength;

[0025] (3), in the cross-line gantry foundation range, 5cm thick fine stone is used for leveling, total station is used for cross-line gantry foundation center line lofting in the leveling area, and lime is used for marking the cross-line gantry foundation range;

[0026] (4), in the marked area, according to the design number of the prefabricated foundation block, from small mileage to large mileage, the prefabricated foundation block is hoisted and placed one by one, that is, the L-shaped end prefabricated foundation block 1 is placed first, then the Z-shaped middle prefabricated foundation block 3 is placed and spliced in turn, and finally the inverted L-shaped end prefabricated foundation block 2 is placed and spliced, to preliminarily form a complete prefabricated block foundation, and finally the prestressed steel strand is threaded, tensioned and sealed, to complete the entire cross-line gantry prefabricated block foundation structure construction.

[0027] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A gantry precast block foundation structure spanning a line, characterized by: The application relates to a prefabricated foundation block, a fixed-end seal anchor, a tensioning-end seal anchor and a plurality of prestressed steel strands, wherein the plurality of prefabricated foundation blocks comprise L-shaped end prefabricated foundation blocks, inverted L-shaped end prefabricated foundation blocks and a plurality of Z-shaped middle prefabricated foundation blocks; the inner walls of the vertical parts of the L-shaped end prefabricated foundation blocks and the inverted L-shaped end prefabricated foundation blocks are opposite to each other; the plurality of Z-shaped middle prefabricated foundation blocks are sequentially spliced between the L-shaped end prefabricated foundation blocks and the inverted L-shaped end prefabricated foundation blocks to obtain a complete prefabricated foundation block; the upper horizontal part of the leftmost Z-shaped middle prefabricated foundation block is inserted into the L-shaped gap of the L-shaped end prefabricated foundation block; the lower horizontal part of the rightmost Z-shaped middle prefabricated foundation block is inserted into the L-shaped gap of the inverted L-shaped end prefabricated foundation block; when two adjacent Z-shaped middle prefabricated foundation blocks are spliced, the lower horizontal part of the left Z-shaped middle prefabricated foundation block is inserted into the position directly below the upper horizontal part of the right Z-shaped middle prefabricated foundation block. The left end face of the L-shaped end prefabricated foundation block and the right end face of the inverted L-shaped end prefabricated foundation block are respectively provided with a fixed-end seal anchor opening and a tensioning-end seal anchor opening; a plurality of parallel tensioning holes are arranged between the fixed-end seal anchor opening and the tensioning-end seal anchor opening on the complete prefabricated foundation block; the two ends of each tensioning hole are respectively communicated with the fixed-end seal anchor opening and the tensioning-end seal anchor opening; the fixed-end seal anchor is arranged in the fixed-end seal anchor opening; the tensioning-end seal anchor is arranged in the tensioning-end seal anchor opening; and the plurality of prestressed steel strands are respectively arranged in the plurality of tensioning holes and fixed to the fixed-end seal anchor at the fixed end and to the tensioning-end seal anchor at the tensioning end.

2. The cross-line gantry precast block foundation structure of claim 1, wherein: The L-shaped end prefabricated foundation block, the inverted L-shaped end prefabricated foundation block and the plurality of Z-shaped middle prefabricated foundation blocks are all reinforced concrete prefabricated foundation blocks.

3. The crossline gantry precast block foundation structure of claim 1, wherein: Three parallel tensioning holes are arranged between the fixed-end seal anchor opening and the tensioning-end seal anchor opening on the complete prefabricated foundation block; two of the tensioning holes are arranged at the same horizontal height; and the other tensioning hole is arranged at a horizontal height higher than that of the two tensioning holes; and the sequentially connected lines of the three tensioning holes form an isosceles triangle.

4. The overline gantry precast block foundation structure of claim 1, wherein: When the leftmost Z-shaped middle prefabricated foundation block is spliced with the L-shaped end prefabricated foundation block, a gap is left between the top face of the horizontal part of the L-shaped end prefabricated foundation block and the bottom face of the upper horizontal part of the Z-shaped middle prefabricated foundation block, and the gap is filled with a leveling layer; when the rightmost Z-shaped middle prefabricated foundation block is spliced with the inverted L-shaped end prefabricated foundation block, a gap is left between the bottom face of the horizontal part of the inverted L-shaped end prefabricated foundation block and the top face of the lower horizontal part of the Z-shaped middle prefabricated foundation block, and the gap is filled with a leveling layer; and when two adjacent Z-shaped middle prefabricated foundation blocks are spliced, a gap is left between the bottom face of the lower horizontal part of the left Z-shaped middle prefabricated foundation block and the top face of the upper horizontal part of the right Z-shaped middle prefabricated foundation block, and the gap is filled with a leveling layer.

5. The overline gantry precast block foundation structure according to claim 1, wherein: The lengths of the portions of the two ends of the plurality of prestressed steel strands extending to the outside of the fixed-end seal anchor and the tensioning-end seal anchor are all 3-4 cm.

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