Integral frame formed by jacking discrete pipe rows in batches and continuously tensioning and construction method
An integral frame, uninterrupted technology, applied in earth-moving drilling, wellbore lining, tunnel lining, etc., can solve the problems of cumbersome construction, deviation of actual stiffness at channel corners, difficult actual operation, etc., and achieve good economic results.
Inactive Publication Date: 2021-07-09
SHANGHAI URBAN CONSTR DESIGN RES INST GRP CO LTD
View PDF7 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The principle of tension sequence is complicated, the construction is cumbersome, and it is not easy to guarantee the quality of the project
[0005] Thirdly, the prestressed steel strand is usually set in a curved form according to the shape of the bending moment envelope diagram, which involves bending cables, and the construction is relatively difficult, and the actual stiffness at the corner of the channel may deviate from the theoretical calculation, and the zero point of the bending moment may also be Corresponding changes, the actual operation is more difficult
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
[0033] Such as Figure 1 to Figure 4 As shown in Fig. 1, the discrete pipe rows are jacked in batches to form an integral frame without interruption, which is used for single-span single-layer box-section structures. Bending moment and negative bending moment, and the steel strands are all in the form of rings;
[0034] Wherein, the steel strand located on the outside of the section is the outer steel strand 3, and the steel strand located on the inside of the section is the inner steel strand 4; both the outer steel strand 3 and the inner steel strand 4 are arranged in the pipe section;
[0035] Pipe joints include standard pipe joint 1, corner pipe joint 2 and tension work pipe joint 7;
[0036] The outer steel strands 3 and the inner steel strands 4 use pulley blocks at the corners of the top plate, bottom plate and side walls of the box-shaped section to complete the switching of the direction of force, forming a closed loop;
[0037] The block of pulleys comprises an ou...
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 discloses an integral frame formed by jacking discrete pipe rows in batches and continuously tensioning and a construction method. The integral frame are used for a single-span single-layer box-type section structure. Outer side steel strands and inner side steel strands are arranged on the outer side and the inner side of a section of the section structure; the outer side steel strands and the inner side steel strands complete stress direction switching at the corners of a top plate, a bottom plate and side walls with box-shaped sections through pulley blocks, and a closed ring is formed; and full-section one-time tensioning is adopted, and the outer side steel strands and the inner side steel strands which are arranged on the outer side and the inner side of the section are tensioned in a same tensioning working pipe joint. During construction, jacking of all pipe joints is completed through a pipe jacking machine; then, interspersing construction of the steel strands is carried out; after completion, concrete is poured into all the pipe joints; and after the concrete in all the pipe joints reaches the design strength, an internal soil body is excavated, and a lining, a waterproof layer and a building surface layer are constructed. According to the application of the integral frame formed by jacking the discrete pipe rows in batches and continuously tensioning, the whole frame is formed through continuous anchoring point transverse tensioning of the scattered pipe rows jacked in batches in a soft soil area.
Description
technical field [0001] The invention relates to the technical field of pipe jacking construction, in particular to a integral frame formed by jacking discrete pipe rows in batches without interruption and a construction method. Background technique [0002] The URT (Under Railway / Road Tunneling method) method first originated in Japan, and is an underground excavation construction method mainly used for underground projects with high environmental protection requirements such as passing through existing railways or roads. According to official data, the corresponding construction method has completed 138 projects in Japan, with a maximum width of 44.8m, a maximum height of 7.5m, a maximum length of 77m, and a soil covering range of 0.1m to 11.5m. . The construction method mainly includes three forms, namely, the lower beam construction method (portal frame), the tunnel structure form (circular or rectangular), and the box structure form (rectangular closure). Among them, t...
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): E21D9/10E21D11/08E21D11/10E21D11/38
CPCE21D9/10E21D11/08E21D11/10E21D11/38
Inventor 张中杰吴航卢恺吕培林刘书殷文涛
Owner SHANGHAI URBAN CONSTR DESIGN RES INST GRP CO LTD