CN-224200669-U - Self-walking composite support applicable to dismantling existing lining of pedestrian crossing of operation highway tunnel

CN224200669UCN 224200669 UCN224200669 UCN 224200669UCN-224200669-U

Abstract

The utility model discloses a self-walking composite support for removing existing lining of a pedestrian crossing of an operation highway tunnel, which relates to the technical field of tunnel construction and comprises two composite supports which are required to be used simultaneously, wherein the composite supports are used for supporting the removal operation of the lining of the pedestrian crossing and the removal operation of a bottom plate of the pedestrian crossing, the composite supports consist of three profile steel arches, arch wire profile steel crossbars, arch foot profile steel crossbars, supporting wheels and protective nets which are longitudinally connected, the profile steel arches are longitudinally arranged along the pedestrian crossing, and the two composite supports are symmetrically arranged to form an asymmetric multi-arch support, so that materials and space are saved, the composite supports are suitable for narrow pedestrian crossing scenes, the supporting wheels are designed to realize the manual rapid pushing of a support system, the repeated temporary support is avoided, the construction time is obviously shortened, the influence on the traffic of the operation tunnel is reduced, the profile steel arches and the crossbars form a rigid support system, and the surrounding rock deformation in the removal process is effectively resisted.

Inventors

WANG XIAOPING
YU YUNYAN
ZHU XIAOMING
Jin Jianzu
DU CHENGCHENG
BAI XUE

Assignees

甘肃省交通规划勘察设计院股份有限公司
兰州交通大学
甘肃省天水公路事业发展中心

Dates

Publication Date: 20260505
Application Date: 20250606

Claims (6)

1. The self-walking composite support for removing the existing lining of the pedestrian crossing of the operation highway tunnel is characterized by comprising two composite supports which are required to be used simultaneously, wherein the composite supports are used for supporting the removal operation of the lining (1) of the pedestrian crossing and the removal operation of the bottom plate (2) of the pedestrian crossing, the composite supports are composed of three steel arches (3), arch wire steel crossbars (4), arch foot steel crossbars (5), supporting wheels (6) and protective screening (7) which are longitudinally connected, the steel arches (3) are longitudinally arranged along the pedestrian crossing, the distance between every two adjacent steel arches (3) is 1 m/m, and the three steel arches are connected into a whole through welding longitudinal connecting ribs to form a stiffening framework of the composite support.
2. The self-walking composite support for removing existing lining of the pedestrian crossing of the operation highway tunnel according to claim 1, wherein the profile steel arch (3) is formed by splicing 1 section of arc-shaped arch and 2 sections of vertical arch through connecting steel plates and high-strength bolts, the arc-shaped arch correspondingly supports the arch part of the removal lining (1) of the pedestrian crossing, the vertical arch correspondingly supports the side wall of the removal lining (1) of the pedestrian crossing, arch wire cross braces (4) and arch foot cross braces (5) are respectively arranged at the arch wire position and the arch foot position of each arch, the arch wire cross braces (4) and the arch foot cross braces (5) are connected with the profile steel arch (3) through the high-strength bolts, the distance between the bottom surface of the arch foot cross braces (5) and the top surface of the removal base plate (2) of the pedestrian crossing is 40cm, and the distance between the bottom of the vertical arch is 10cm.
3. The self-walking composite support for removing the existing lining of the pavement transverse tunnel of the operation highway tunnel according to claim 2, wherein the support wheels (6) are arranged below the arch foot section steel transverse struts (5), 4 support wheels (6) are arranged on each composite support, steel plates with reserved bolt holes are arranged at the tops of the support wheels (6), and the support wheels are fixedly connected with the arch foot section steel transverse struts (5) through bolts (8) to form a self-walking structure capable of being manually pushed.
4. The self-walking composite support for removing the existing lining of the pedestrian crossing of the operation highway tunnel according to claim 3 is characterized in that the protective net (7) is integrally paved on the outer side of the profile steel arch (3), and a part with a gap between the protective net (7) and the lining (1) for removing the pedestrian crossing is filled by wood wedges.
5. The self-walking composite support for removing the existing lining of the pedestrian crossing of the operational highway tunnel according to claim 4, wherein two composite supports are symmetrically arranged along the two sides of the removing section of the pedestrian crossing removing lining (1), and the clear distance between the two composite supports is not more than 5m.
6. The self-walking composite support for removing the existing lining of the pavement transverse tunnel for the operation highway tunnel according to claim 5, wherein the section steel arch (3), the arch wire section steel transverse strut (4) and the arch foot section steel transverse strut (5) of the composite support are all factory prefabricated components and are assembled on site through high-strength bolts.

Description

Self-walking composite support applicable to dismantling existing lining of pedestrian crossing of operation highway tunnel Technical Field The utility model relates to the technical field of tunnel construction, in particular to a self-walking composite support for removing an existing lining of a pedestrian crossing of an operation highway tunnel. Background The crosswalk of the highway tunnel is an important evacuation and escape passage in the tunnel operation process, and has non-negligible significance for guaranteeing personal and property safety in emergency. The crosswalk is affected by engineering geology, engineering quality, operation time extension, maintenance management and the like, and serious damage to the structure is caused by lining crack, bottom plate bulge deformation and the like, so that maintenance and reinforcement of the crosswalk can be necessary. The maintenance methods such as lining reinforcement, shotcrete reinforcement and the like all need a certain reinforcement space, namely any structure or member does not invade the building limit after reinforcement, but the narrow space with the clear height of 2.5m and the clear width of 2.0m of the crosswalk cannot practically guarantee the requirement of the maintenance method on no invasion after implementation. Therefore, the repair and reinforcement of severe defects of crosswalk require the partial or complete dismantling of the existing lining structure. The demolition process of the crosswalk lining can generate disturbance to the stabilized surrounding rock-supporting system, and the self-balance of the stress of the system is damaged, so that collapse of demolition sections can be caused, and the lining structure of the adjacent demolition sections can be influenced. And because of the difficulty in operating tunnel traffic organization, the lining structure is quickly and safely dismantled. The utility model aims to provide a safe and rapid structural support for dismantling a crosswalk lining, and the stability of a surrounding rock-supporting system and the safety of operators in the dismantling process are ensured. Therefore, based on the above search and in combination with the prior art, a self-walking composite support for removing the existing lining of the pedestrian crossing of the operation highway tunnel is provided to solve the above problems. Disclosure of utility model The utility model aims to provide a self-walking composite support for removing an existing lining of a pedestrian crossing of an operation highway tunnel so as to solve the problems in the prior art. In order to achieve the above purpose, the present utility model provides the following technical solutions: The utility model provides a be applicable to the existing lining of operation highway tunnel crosswalk and demolish with walking compound support, including two compound supports that need use simultaneously, compound support is used for supporting the crosswalk and demolishs the operation of demolishs the lining and crosswalk and demolishs the bottom plate, compound support comprises three vertically connected shaped steel bow member, arched wire shaped steel cross bracing, arch foot shaped steel cross bracing, supporting wheel and protection network, shaped steel bow member is along crosswalk longitudinal arrangement, adjacent shaped steel bow member interval is 1 m/pin, and three pin bow members link into a whole through welding longitudinal connecting rib, form the stiffness skeleton of compound support. Further, shaped steel bow member is formed by section arc bow member and Duan Shuzhi bow member through connecting steel sheet and high strength bolt concatenation, the arc bow member corresponds the support the arch of lining is demolishd to the crosswalk, vertical bow member corresponds the support the sidewall of lining is demolishd to the crosswalk, and the arch line position and the arch foot position of every pin bow member are equipped with arched wire shaped steel cross brace and arch foot shaped steel cross brace respectively, arched wire shaped steel cross brace and arch foot shaped steel cross brace all are connected with shaped steel bow member through high strength bolt, arch foot shaped steel cross brace bottom distance is 40cm to the crosswalk demolishs bottom plate top surface distance, and vertical bow member bottom distance is 10cm to the crosswalk demolishs bottom plate top surface distance. Further, the supporting wheel is installed below the arch foot section steel cross braces, 4 supporting wheels are arranged on each composite support, a steel plate with reserved bolt holes is arranged at the top of each supporting wheel, and the supporting wheels are fixedly connected with the arch foot section steel cross braces through bolts to form a self-walking structure capable of being manually pushed. Further, the protection network is integrally paved outside the profile steel arch, and a part with a gap between the pr