Sidewalk safety isolation facility for tunnel and design method of sidewalk safety isolation facility

A technology of safe isolation and design method, applied in road safety devices, roads, roads, etc., can solve the problems of the form, standard and principle of isolation facilities are not specified, it is inconvenient for technicians to identify and adopt, and it is difficult to ensure the safety of pedestrians, etc. The effect of preventing pedestrians from overturning, simple structure and improving structural strength

Active Publication Date: 2022-03-25
HUNAN PROVINCIAL COMM PLANNING SURVEY & DESIGN INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006]The main purpose of the present invention is to provide a sidewalk safety isolation facility and its design method for tunnels, so as to solve the problem that current codes and standards only require setting safety isolation Facilities, there are no regulations on the form, standards, principles, etc. of isolation facilities, which is not convenient for technical personnel to identify and adopt, and it is difficult to ensure the safety of pedestrians

Method used

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  • Sidewalk safety isolation facility for tunnel and design method of sidewalk safety isolation facility
  • Sidewalk safety isolation facility for tunnel and design method of sidewalk safety isolation facility
  • Sidewalk safety isolation facility for tunnel and design method of sidewalk safety isolation facility

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Embodiment approach

[0056] As a preferred embodiment of the present invention, the step S2 includes:

[0057] S21, according to the formula Check and calculate the stress of the collision protection surface 140 per unit length along the tunnel longitudinal extension direction of the guardrail 110 under the preset standard load; wherein, q is the load standard value (kN / m), and y is the distance from the collision load to the calculation site (m), x is the thickness (m) of the guardrail 110, σ is the edge stress (kPa) of the collision protection surface 140, M is the section bending moment (kN.m), and w is the bending section coefficient, wherein the rectangular section is

[0058] S22, according to the structure where the maximum bending moment occurs, there is no tensile stress on the collision protection surface 140 to control the thickness of the bottom of the guardrail 110, so that σ=f t , and get the relationship between x and y: Among them, f t Design tensile strength of concrete (kP...

Embodiment

[0079] The present invention specifically describes how to set it up in conjunction with a certain tunnel 100 in Changsha City. The tunnel 100 is a section of an urban arterial road, which is set for crossing an 80m high mountain. The tunnel 100 has a length of 550m and a design speed of 50km / h. Due to the large amount of pedestrian traffic on the main road, the sidewalk 120 is arranged in the tunnel 100 in order to avoid slow traffic from affecting the passage of the main road. In order to save engineering investment, the sidewalk 120 and the carriageway 130 adopt the same hole arrangement, and the sidewalk 120 is only arranged on one side. The traffic lane 130 adopts a one-way two-lane mode, and the height of the sidewalk 120 above the traffic lane 130 is 25 cm. The value of the safety isolation facility is determined according to the concrete anti-collision wall 150 at the bottom and the isolation guardrail 160 at the top, and its value is determined according to the above...

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Abstract

According to the sidewalk safety isolation facility for the tunnel and the design method of the sidewalk safety isolation facility, on the basis of summarizing collision test results, the scheme that a facility belt is arranged between a sidewalk and a roadway, and the safety isolation facility composed of a concrete anti-collision wall and an isolation guardrail is arranged in the facility belt is provided; the method comprises the following steps: determining that a safety isolation facility is a protective fence prepared from a concrete material according to the collision test requirement of the tunnel safety isolation facility, determining the calculated thickness of the protective fence according to the allowable stress of the material of the protective fence under the action of collision force, and determining the actual construction thickness of the protective fence according to the construction requirement and the calculated thickness. The design parameters of the protective fence are innovatively calculated, it can be guaranteed that the protective fence has enough damping and energy absorption effects, the structural strength is high, stability and reliability are achieved, and then the safety of pedestrians is guaranteed.

Description

technical field [0001] The invention relates to the technical field of tunnels and underground engineering, in particular to a sidewalk safety isolation facility for tunnels and a design method thereof. Background technique [0002] With the development and expansion of the city, the flow of people and vehicles in the core area of ​​the city will gradually become denser, and the roads will gradually become congested, especially during morning and evening peak hours. Since the road network structure of most urban roads uses ground level intersections to organize the traffic flow of two intersecting roads in the early stage of development, its traffic capacity is relatively limited. For three-dimensional intersection. One of the three-level intersections is to use tunnels. If the tunnel is a part of the trunk road or secondary trunk road, you need to consider setting up sidewalks. [0003] When the urban tunnel length is greater than 1000m, its CO and NO x The concentration...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01F15/08E01F15/14G06F30/13
CPCE01F15/083E01F15/088E01F15/14G06F30/13Y02A30/60
Inventor 任会刘云付李瑜熊建军胡惠华王建华杨雄王海林尹俊涛蔡丽琴汪敬胡久羡黄欣刘汉宏王木群李拼李金鑫
Owner HUNAN PROVINCIAL COMM PLANNING SURVEY & DESIGN INST CO LTD
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