Novel streetcar subgrade structure

A technology for trams and roadbeds, applied in roads, tracks, buildings, etc., can solve the problems of large width and thickness of roadbeds, great impact on the surrounding environment, secondary excavation of backfill soil, etc., so as to improve construction efficiency and avoid secondary Effect of excavation and reduction of excavation depth

Inactive Publication Date: 2018-04-10
GUANGZHOU METRO DESIGN & RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, domestic tram track roadbeds have various structural forms and thicknesses, and the standards are not uniform. The positive trapezoidal section is adopted, and the width and thickness of the roadbed are large, resulting in large excavation volume, long construction period, high cost, and impact on the surrounding environment. It is large and requires secondary excavation of the backfill when the pipeline is laid in the later stage, and the process is complicated

Method used

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  • Novel streetcar subgrade structure
  • Novel streetcar subgrade structure

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Such as figure 1 Shown is a new tram subgrade structure provided by this embodiment, including an excavation trench, the excavation trench is an inverted ladder-shaped structure, and the bottom of the excavation trench is laid with a filled road base 3 , the upper surface of the filling road base 3 is provided with a support plate 4, and the depth range of the excavation trench is 1.1-1.7m. In the present embodiment, the depth H=1.4m of the excavation trench is taken, and the excavation trench The top opening width range of digging trench is 9-13m, gets the top opening width L=11m of digging trench in the present embodiment, and the thickness range of described filling road base 3 is 0.5-1m, takes in the present embodiment The thickness of the filling road base 3 is 0.8m, and the thickness range of the support plate 4 is 0.1-0.2m. In the present embodiment, the thickness of the support plate 4 is 0.1m, and the width range of the support plate 4 is 2.4-0.2m. 2.8m, get t...

Embodiment 2

[0022] Such as figure 2 The embodiment shown in this example provides a novel integrated tramway subgrade track structure, including a track structure and a novel tramway subgrade structure described in Embodiment 1, and the track structure includes a ballast bed 8, sleepers 6 and steel rails 7. The support plate 4, ballast bed 8, sleeper 6 and rail 7 are sequentially connected from bottom to top, the number of the track structure is 2, and the width of the ballast bed 8 is 2.4m. The upper surface of the filling road base 3 is paved with a soil layer. After the tram track is laid, the soil layer is filled in the excavated trench, and further for better recovery of the ground, the backfill soil layer is carried out as road Hardening, sidewalk paving, vegetation restoration and other measures.

[0023] The specific construction process of this embodiment includes the following steps: a. Pipeline relocation, traffic relief, construction enclosure, site leveling and foundation t...

Embodiment 3

[0026] Such as image 3 It is shown that this embodiment provides a new type of integrated tramway subgrade track structure. The difference between this embodiment and Embodiment 2 is that the number of the track structure is one.

[0027] Other structures in this embodiment are the same as those in Embodiment 2, and will not be repeated here.

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Abstract

The invention relates to a novel streetcar subgrade structure. The structure includes an excavation groove, and the excavation groove is of an inverted-trapezoid-shaped structure. A filling subgrade layer is laid on the bottom of the excavation groove, a support plate is arranged on the upper surface of the filling subgrade layer, the support plate refers to a prefabricated slab or a pouring concrete layer, a binding steel fabric is arranged in the pouring concrete layer, and at least one side portion of the support plate is provided with a pipeline groove. According to the novel streetcar subgrade structure, an inverted-trapezoid-shaped structure is adopted, on the premise that the requirement of the bearing capacity of a streetcar subgrade is met, the width and thickness of the subgradeare optimized, the excavation volume is reduced, the construction period is shortened, the cost is reduced, the influence on the surrounding environment is reduced, and the situation that later pipeline laying requires secondary excavation of backfill soil.

Description

technical field [0001] The invention relates to the field of municipal engineering, in particular to a novel streetcar subgrade structure. Background technique [0002] As a new type of urban rail transit system, modern trams are popular in many places because of their low construction cost and short construction period. The track subgrade is an important structure that bears the load of the track and the train. It should have sufficient strength, stability and durability to ensure the safe operation of the train. Considering that modern trams are generally constructed on the ground, the vehicle load is relatively small, and the bearing capacity of the subgrade is relatively low. At the same time, in order to reduce the impact on the surrounding environment, the excavation width and depth should not be too large. [0003] The subgrade surface of modern trams is generally about 0.5 meters lower than the top surface of the rail (the height of the track structure), and the sub...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01B2/00
CPCE01B2/00
Inventor 柳宪东史海欧肖峰刘鑫刘欣
Owner GUANGZHOU METRO DESIGN & RES INST
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