Don't underestimate the shoulder wall. Oh, it has a demanding design and a lot of use. It plays a significant role in maintaining smooth traffic. Here we look at the specific look at the role of the shoulder wall and the construction technology of the shoulder wall.
First, the main role of the shoulder wall
1 to protect the stability of major structures such as traffic lanes;
(2) For the occurrence of mechanical failure or emergency situations, the vehicle needs temporary parking to provide location;
3 Provide lateral width, which is conducive to safety and increase comfort;
4 Available for pedestrians and bicycles;
5 Provide locations for setting up on-street facilities;
6 as a workplace for conservation operations;
7 It can also be used as a location to lay underground facilities without damaging the highway structure;
8 Improve the line-of-sight of bends on excavation roads to improve traffic safety;
9 Enables rainwater to be discharged at a location away from the carriageway, reducing storm water penetration and reducing road damage.
Second, the shoulder wall design
Right shoulder
For a four-lane highway with a design speed of 120km/h, a hard shoulder of 3.50m on the right should be used. For six-lane and eight-lane highways, a hard shoulder of 3.0m on the right should be used. When subject to terrain conditions and other special circumstances, the minimum value can be used.
Left shoulder
For an eight-lane and above highway as an integral cross-section, it is neither safe nor realistic to let a failed or exhausted vehicle cross several lanes and park to the right shoulder. As a rule of thumb, hard shoulders at least not less than 2.5m thick should be provided on the left side for anchored vehicles to park or wait for towing.
Third, the shoulder wall construction process
1. Construction lofting and excavation, from the approach retest and encrypted wire points, release the control piles of the retaining wall and encrypt them, hit a small nail on the top of the pile, and then use cement mortar to fix the pile so that the linear shape can be controlled at any time in the construction process. At the same time, the level of re-testing and encryption will guide the elevation to each stake in order to detect the depth of excavation. After the inspection engineer supervised the test, the excavation line of the foundation pit was sprinkled with lime. The excavation work of the retaining wall was carried out manually with an excavator. The excavator was used to excavate along the open pit to the base design elevation of 20 to 30 cm above, and then Manually clean the remainder to the base design elevation and level it.
2. Before the foundation wall construction, if there is a soft foundation treatment, it must be excavated to the back of the bedrock to be built to ensure the stability of the retaining wall. The size requirement of the block stone is: 30cm×30cm×100cm. Before masonry, the scale of the stone surface should be cleaned and kept moist with water. Before the masonry, the poles must be erected on both sides. The outside line should be straight and neat, and the inside line should be roughly conformed to ensure that the geometrical dimensions of the masonry parts meet the design requirements. Therefore, in the process of masonry construction, the poles should always be effective. The mortar masonry should be paved with slurry, and the vertical joints should be filled with slurry. There must be no gaps and vertical joints. When the masonry is interrupted, the pores of the stone layer can be filled with mortar, and the surface must be carefully cleaned and wetted. Settlement joints are set to 10~15m in accordance with the requirements of the specification, and the width of the joints is 2cm. The settlement joints are filled with asphalt batts along the inside, outside and top three sides.
The design of the shoulder wall has been introduced here and I hope to help everyone. If you want to know more related information, you can pay attention to this website information.
Wall decoration diatom mud partition wall design entrance decoration design wall wallpaper living room glass partition wall balcony wall decoration
Integrated All In One Solar Light
Integrated All In One Solar Light,All In One Solar Light,Integrated Solar Street LED Light
China Searun Solar Solution Co., Ltd. , https://www.searunsolar.com