3D printed steel fiber reinforced concrete tunnel preliminary support grating arch frame and construction method thereof

A fiber-reinforced concrete and 3D printing technology, applied in tunnels, tunnel linings, earthwork drilling and mining, etc., can solve problems such as difficulties in hoisting, transportation and installation, loss of steel strength, and difficulties in construction by workers, achieving easy construction quality assurance and no strength loss , beneficial to the effect of stability

CN110159299APending Publication Date: 2019-08-23CHINA STATE CONSTRUCTION ENGINEERING CORPORATION +1
0 Cites 3 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2019-08-23

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention provides a 3D printed steel fiber reinforced concrete tunnel preliminary support grating arch frame and a construction method thereof. The arch frame is divided into a plurality of unitjoints in the extending direction of the arch frame. Each unit joint is formed in an integral printed manner through 3D printing equipment. Each unit joint comprises a 3D printed outer support plate,a 3D printed reinforcing support, a 3D printed inner side support and 3D printed bolt connecting plates. The 3D printed bolt connecting plates are arranged at the head end and the tail end of each unit joint. Transverse plates of two L-shaped plates on the same side of two adjacent unit joints are mutually connected to form the overall arch frame. According to the arch frame, the steel fiber reinforced concrete outer support plates are large in stress area, can bear surrounding rock pressure more effectively than grating steel frame main reinforcement, and can effectively ensure stress performance of preliminary support components. The arch frame is integrally manufactured by adopting the printing form of a 3D printer, the weight of the arch frame is low compared with grating steel arch frame preliminary support components, hoisting and installing are facilitated, and the hoisting cost can be reduced effectively. Meanwhile, the situation that traditionally, grating steel frame is welded and machined manually on preliminary support site is avoided, the labor cost is reduced, and the construction period is shortened.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the technical field of tunnel construction, in particular to a 3D printed steel fiber concrete tunnel initial support grid arch frame and a construction method thereof which can be used in underground excavation tunnel construction, and is applicable to various underground excavation tunnels requiring initial support construction. Background technique

[0002] With the rapid development of the economy and the continuous improvement of the level of urbanization, the development of underground space has become one of the main directions of urban space development, and there are more and more underground structures. Underground tunnels are the main components of urban underground space development. , occupies an important position. At present, most of the initial support of underground excavation tunnels are constructed with grid steel frames, and there are the following problems:

[0003] 1. Poor construction accuracy of the gri...

Examples

Embodiment Construction

[0045]In the following, embodiments of the 3D printed steel fiber concrete tunnel primary support grid arch frame and its construction method of the present invention will be described with reference to the accompanying drawings. The examples described here are specific specific implementations of the present invention, and are used to illustrate the concept of the present invention. They are all explanatory and exemplary, and should not be construed as limiting the implementation of the present invention and the scope of the present invention. In addition to the embodiments described here, those skilled in the art can also adopt other obvious technical solutions based on the claims of the application and the contents disclosed in the description, and these technical solutions include adopting any obvious changes made to the embodiments described here. Replacement and modified technical solutions.

[0046] The accompanying drawings in this specification are schematic diagrams,...