Long-span section mandrel in open cut construction and treatment method thereof
A processing method and technology in construction, applied in artificial islands, water conservancy projects, infrastructure projects, etc., can solve problems such as increased construction costs, and achieve the effect of stable and reliable core mold, low cost, and overall stability.
Inactive Publication Date: 2015-09-09
JINAN URBAN CONSTR GRP
View PDF5 Cites 1 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Since some open-cut tunnels belong to the box culvert structure, if the inflatable mandrel is used for construction, the mandrel cannot be taken out after construction, which will increase the construction cost
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0021] Accompanying drawing is a kind of specific embodiment of the present invention. This embodiment comprises several parallel circular rings 1, and the circular rings 1 are connected with connecting steel bars 2, and the surroundings of the circular rings 1 are evenly provided with moso bamboo sheets 3, and the moso bamboo sheets 3 are covered with tin sheets 4, and the two ends are blocked with bamboo plywood 5 . The distance between rings 1 is 1m. There are three connecting steel bars 2, which are evenly arranged around the ring 1. The ring 1 is made of Ф12 threaded steel, and the connecting steel bar 2 is made of Ф10 threaded steel.
[0022] Using the processing method of the large-span cross-section mandrel in open excavation construction of the present invention, first use Ф12 threaded steel to make several circular rings 1 of the required mandrel size, and then use Ф10 threaded steel to make these circular rings 1 Connect them to form a cylindrical shape (the dist...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention belongs to the technical field of open cut construction and particularly relates to a long-span section mandrel in the open cut construction and a treatment method thereof. The long-span section mandrel is characterized by comprising a plurality of parallel circular rings which are connected through connecting rebars; bamboo pieces are uniformly arranged on the periphery of every circular ring; a galvanized iron sheet wraps every bamboo piece; each end of every bamboo piece is blocked through bamboo plywood; the produced mandrel is in firm welding connection with main body rebars after being annularly locked through a plurality of rebars. During construction, four layers of concrete pouring is performed, the time interval of every two adjacent layers of concrete pouring is 1 to 1.5 hours, and press-polishing, surface finishing and maintenance are performed. According to the long-span section mandrel in the open cut construction and the treatment method thereof, the cost is low in comparison with inflatable mandrels and double-wall corrugated pipe mandrels, the installation and the fixation can be convenient, the strength of the long-span section mandrel can be ensured, the long-span section mandrel is stable and reliable in the construction process, and the integral stability and the field security of the construction structure are ensured.
Description
(1) Technical field [0001] The invention belongs to the technical field of open-cut construction, in particular to a mandrel with a large-span section in open-cut construction and a processing method. (2) Background technology [0002] At present, in order to reduce the self-weight of the known long-span concrete section and ensure the strength, safety and stability of the structure, a core mold is used in the structure. Since some open-cut tunnels belong to the box culvert structure, if an inflatable mandrel is used for construction, the mandrel cannot be taken out after construction, which will increase the construction cost. (3) Contents of the invention [0003] In order to make up for the deficiencies of the prior art, the present invention provides a mandrel with low cost, convenient installation and high strength and a large-span section mandrel in open-cut construction and a processing method. [0004] The present invention is achieved through the foll...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): E02D29/05
Inventor 夏映贤金宝王玉峰郑继清李树伟
Owner JINAN URBAN CONSTR GRP