The overall structure and strength of the connection of the lower crossbar made of galvanized guardrail shall withstand 1000N external force. If there is a possibility of vehicle or object collision, measures such as increasing the spacing and embedment depth of the cross-section of the crossbar or encrypting the railing column shall be taken.
The large-scale enterprises engaged in the design, production and processing of composite pipe and metal guardrail, such as guardrail steel plate column, stainless steel handrail, stainless steel bridge guardrail, anti-collision guardrail and isolation guardrail, have strong strength, advanced equipment integrity, exquisite technology and scientific and advanced quality management system. The guardrail products are environmentally friendly, beautiful, solid and corrosion-resistant, which are widely used in bridge projects, scenic spots and other guardrail projects. The integrity, strength and product quality of Liaocheng Runda Pipe Co., Ltd. are recognized by the industry. Welcome friends from all walks of life to visit, guide and business negotiation.
The utility model relates to a longitudinal energy absorption structure, which absorbs collision energy through self deformation or vehicle climbing, so as to change the driving direction of the vehicle, prevent the vehicle from going out or entering the opposite lane, and greatly reduce the injury to the passengers. According to its longitudinal setting position in the highway, it can be divided into subgrade guardrail and bridge guardrail; according to its transverse setting position in the highway, it can be divided into roadside guardrail and median guardrail; according to the degree of deformation after collision, it can be divided into rigid guardrail, semi-rigid guardrail and flexible guardrail. Moreover, it is flexible and can make full use of the impact force to cushion and reduce the impact on the surrounding structure. Because the hammerhead is not separated from the pile during driving, the pile readjustment is avoided and the construction progress is greatly accelerated during the transfer. 5. Hydraulic piling can not only install the bracket and the anti block after the installation column of the bracket and the anti block are fixed.
When the columns are set on the ground where the cement concrete, asphalt concrete or other premixed asphalt materials are laid, the column pit shall be backfilled to 50 mm below the pavement surface, and the rest shall be backfilled and compacted with the same pavement materials to the satisfaction of the supervising engineer. The column shall not cause any visible deformation due to the selection of driving method. Any columns that are excessively damaged shall be removed and replaced by the contractor. Damaged columns that the Engineer considers acceptable must be corrected within 24 hours with excellent cold galvanizing compound. In case of any situation that is not conducive to the installation of road guardrail, such as pipeline buried under the road foundation, the operator shall respond in time and adjust the fixation mode of road guardrail in time. Second: column installation. The installation of road guardrail column must be in accordance with the road design drawing, followed by. In the process of setting out, the installation of road guardrail column must be coordinated with the linearity of the installed road.
During the construction of stainless steel composite pipe bridge guardrail, attention shall be paid to the following problems: 1. During the construction of guardrail, the data of various facilities shall be accurately mastered, especially the exact location of various pipelines buried in the subgrade. No damage to underground facilities is allowed during the construction process. If the filling depth of underground communication pipeline, drain pipe or culvert top is insufficient, the position of column shall be adjusted or the fixing method of column shall be changed. 2. When the column is driven too deep, the column shall not be pulled out for correction, the rest shall be pulled out, and the foundation shall be tamped again before driving, or the position of the column shall be adjusted. 3. Flange plate shall be installed for stainless steel composite pipe guardrail, and attention shall be paid to the positioning of flange plate and the control of elevation of column top surface.
Strengthening the safety of the road is particularly burning. Although the wave guardrail of the highway can not prevent accidents, it can at least reduce casualties. Other corrugated guardrails ring up the highway to make it a closed trek area so as to prevent passers-by. In the face of this trend, more than 20 billion children suffer from direct economic loss. About 10 million people die every year in China. Wave shaped guardrail is an important way of guardrail and an important means of transportation in common road facilities. Basement becomes an essential part of high-rise buildings in the city. The construction of basement inevitably needs to excavate the soil. Due to the depth and soil conditions, there may be collapse, landslide and other phenomena in the process of soil excavation. How to solve the requirements of soil slope instability and surrounding use. With the continuous development and use of urban space, foundation pit supporting engineering is required.
There are three specifications of iron fence and frame fence. The main material is introduced here. 1. Pluggable guardrail net, mainly a common type of specification, is convenient in installation and stability, and has stable and efficient use value. Formed the pluggable guardrail net has become the main material of pluggable guardrail net, which has better value in terms of fixing among the specifications and styles of guardrail net.