CN-224214175-U - High-altitude plate shield originating platform

CN224214175UCN 224214175 UCN224214175 UCN 224214175UCN-224214175-U

Abstract

The utility model relates to the technical field of tunnel engineering, in particular to a shield originating platform for a high-altitude plate, which is improved on the basis of the existing originating platform, wherein a reaction frame is connected with an upper middle plate through an inclined strut, the top of the originating frame is fixedly connected with a lower middle plate, permanent combination of the middle plate and the originating platform is realized, horizontal thrust force generated by the shield machine is dispersed to a plurality of permanent structures, acting forces in different directions are stably born, the safety risk is reduced, the safe originating of tunnel tunneling is ensured, and in addition, a reserved pit slot is arranged on the middle plate, so that the material waste and the construction period investment of a temporary middle plate and a full scaffold for construction are saved.

Inventors

HUANG WENHAO
WU JUNYE
LIN SHUHAI
LAN Hailiang
HE JIANMING
Pan tianyu
CHEN JIRUN
QIU XIFAN
GUAN KAIWEN

Assignees

广东华隧建设集团股份有限公司

Dates

Publication Date: 20260508
Application Date: 20250626

Claims (9)

1. A high-altitude plate shield launching platform is arranged in a launching well, and the launching well is arranged in a subway station; The bottom plate and the lower middle plate of the subway station extend from the rear side to the front side of the originating well, the upper middle plate of the subway station extends to the rear side of the originating well, an originating portal is arranged above the lower middle plate of the front side of the originating well, and a station structure beam is arranged below the originating portal; The high-altitude plate shield starting platform comprises a starting frame and a reaction frame, wherein the starting frame is used for supporting the shield machine, the starting frame is fixed on the bottom plate, and the reaction frame is arranged on the starting frame; The shield tunneling machine is characterized in that the lower middle plate is provided with a reserved pit slot with the length not larger than the length of the originating well and the width smaller than the diameter of the shield tunneling machine, the reserved pit slot is located above the originating frame, the top of the originating frame is lower than the lower middle plate and is fixedly connected with the lower middle plate, and the counterforce frame is connected with the upper middle plate.
2. The overhead slab shield initiation platform of claim 1, wherein the long sides of the pre-reserved pit slots are provided with tongue and groove, and the tongue and groove is provided with a first steel rail for supporting a shield machine.
3. The overhead shield initiation platform of claim 1, wherein the reaction frame comprises: The steel ring is arranged on one side close to the shield machine and is used for directly bearing the impact of the shield tail of the shield machine; The rear shield frame is arranged at one side far away from the shield machine and is fixedly connected with the steel ring; A first diagonal brace, a structural beam connecting the rear shield frame and the upper middle plate, and And the second diagonal brace is connected with the rear shield frame and the lower middle plate.
4. A high altitude plate shield initiation platform as claimed in claim 3, wherein the second number of struts is greater than the first number of struts.
5. The overhead shield initiation platform of claim 3, wherein the first and second diagonal braces form an angle of 20-25 ° with the horizontal.
6. The overhead shield launch platform of claim 1 wherein said launch frame comprises: the lower end of the upright post is connected with a bottom plate of the station, and the upper end of the upright post is lower than the middle plate of the lower layer; the third diagonal bracing is used for connecting adjacent upright posts; The plate layer is paved at the upper end of the upright post, and one side of the plate layer is closely attached to the station structure beam below the initial portal; a plurality of middle plate supports arranged above two columns on two sides of the shield direction, a lower plate member layer connected with the middle plate of the lower layer, and The shield machine bracket is paved on the plate layer, below the starting portal and between the two rows of middle plate supports, and a second steel rail is arranged on the shield machine bracket.
7. The aerial shield initiation platform of claim 6, wherein the plate layer comprises an upper layer of steel plates, a longitudinal and transverse skeleton and a lower layer of steel plates fixedly connected in sequence from top to bottom.
8. The overhead slab shield initiation platform of claim 7, wherein the longitudinal and transverse backbones comprise longitudinal and transverse steel beams, and wherein the intersection of the longitudinal and transverse steel beams is above the upright.
9. The overhead shield initiation platform according to claim 6, wherein the middle plate roof comprises a short steel pipe and/or a plurality of spliced I-steel, and the I-steel is connected above the short steel pipe.

Description

High-altitude plate shield originating platform Technical Field The utility model relates to the field of tunnel engineering, in particular to a shield originating platform for a high-altitude plate. Background With the rapid development of urban rail transit, shield construction gradually becomes a main method for constructing an underground tunnel. The conventional shield launching is that the shield machine is started on a station bottom plate, the load of the shield machine is supported by the strength of the bottom plate and the soil pressure of an outside soil body, if the shield machine is started on a station middle plate, a temporary middle plate is generally required to be constructed at an elevation position matched with the shield launching, a full framing is erected from the bottom plate to the middle plate and is reserved for a long time, and after the shield construction is completed, the temporary middle plate is required to be chiseled out to re-construct the middle plate, so that a great amount of waste is caused. The existing high-altitude originating platform structure comprises a full scaffold and a temporary middle plate, wherein the full scaffold is constructed to obviously reduce the construction period, and the temporary middle plate is constructed to not only reduce the construction period, but also use more construction materials under the condition of the same bearing capacity, so that the cost burden is brought. In structural design, if the temporary starting platform is supported by a steel pipe independently, certain potential safety hazards exist. The weight of the shield machine and the dead weight of the platform are used as vertical acting forces in the shield launching process, and meanwhile, the friction resistance in the advancing process of the shield machine can generate horizontal acting forces on the launching platform, so that the whole collapse of the steel platform is extremely easy to cause. Therefore, development of a high-altitude plate originating platform is needed, which can save materials, shorten the construction period, stably bear acting forces in different directions, reduce safety risks and ensure safe tunneling and originating. Disclosure of utility model The utility model aims to overcome at least one defect of the prior art, and provides a high-altitude shield launching platform which can save materials required by the launching platform, stably bear acting forces in different directions and reduce safety risks on the basis of shortening the launching period. The technical scheme adopted by the utility model is that a high-altitude plate shield launching platform is provided, the platform is arranged in a launching well, and the launching well is arranged in a subway station; The bottom plate and the lower middle plate of the subway station extend from the rear side to the front side of the originating well, the upper middle plate of the subway station extends to the rear side of the originating well, an originating portal is arranged above the lower middle plate of the front side of the originating well, and a station structure beam is arranged below the originating portal; The high-altitude plate shield starting platform comprises a starting frame and a reaction frame, wherein the starting frame is used for supporting the shield machine, the starting frame is fixed on the bottom plate, and the reaction frame is arranged on the starting frame; The lower middle plate is provided with a reserved pit slot with the length not larger than the length of the starting well and the width smaller than the diameter of the shield tunneling machine, the reserved pit slot is positioned above the starting frame, the top of the starting frame is lower than the lower middle plate and is fixedly connected with the lower middle plate, and the reaction frame is connected with the upper middle plate. The existing originating platform only connects the diagonal brace with the middle plate or the bottom plate below the shield machine, lacks the support of the middle plate at the upper layer, and has the structural stability to be improved. Compared with the scheme, the high-altitude shield launching platform has the advantages that the reaction frame is connected with the upper middle plate through the inclined support, the top of the launching frame is fixedly connected with the lower middle plate, permanent combination of the middle plate and the launching platform is realized, horizontal thrust of the shield machine is dispersed to a plurality of permanent structures, temporary support requirements are reduced, and collapse risk is reduced. In terms of saving construction period, the scheme does not remove all middle plates in the originating well, but keeps most structures of lower middle plates, and only digs out reserved pit slots for accommodating the shield machine. The existing middle plate is used as a supporting foundation, construction of a traditional full