CN214944311U

CN214944311U - Tunnel secondary lining using assembled UHPC structure as bottom die

Info

Publication number: CN214944311U
Application number: CN202121173098.2U
Authority: CN
Inventors: 苏家战; 陈宝春; 邓涛; 缪圆冰; 郑路; 胡文旭
Original assignee: Fuzhou University
Current assignee: Fuzhou University
Priority date: 2021-05-28
Filing date: 2021-05-28
Publication date: 2021-11-30
Anticipated expiration: 2031-05-28

Abstract

The utility model relates to an use tunnel secondary lining of assembled UHPC structure as die block, including assembling respectively at tunnel gallery left side wall segment, right side wall segment and vault segment's UHPC floor beam segment, wholly form assembled UHPC structure, as tunnel secondary lining's die block, this die block is built as an organic wholely with secondary lining outside reinforcing bar net. The ultrahigh compressive strength, high crack resistance, impermeability, freeze-thaw resistance and high durability of the UHPC are fully exerted, and the dimensional accuracy and quality of the prefabricated segment component can be ensured; the mechanized assembly in the holes can shorten the construction period and improve the labor conditions; the assembled ring can be used as a non-dismantling template for pouring concrete, bear the self weight of grouting and cast-in-place concrete, reduce the binding workload of the reinforcement cage in the inner cavity and save a large amount of supporting materials and labor. Simultaneously the utility model discloses simple structure, reasonable in design, construction convenience, but wide application improves efficiency of construction and life in tunnel structure.

Description

Tunnel secondary lining using assembled UHPC structure as bottom die

Technical Field

The utility model relates to an use tunnel secondary lining of assembled UHPC structure as die block.

Background

The tunnel is an important component of the national traffic infrastructure, the existing tunnel has the defects of bad construction operation conditions, multiple construction procedures and difficult guarantee of construction quality, and particularly the defects of freezing damage, water leakage, lining cracking, steel bar exposure and the like exist on the inner side of the secondary lining of the tunnel, so the operation and maintenance cost is improved, and the service life is reduced.

SUMMERY OF THE UTILITY MODEL

In view of the deficiency of the prior art, the technical problem to be solved by the utility model is to provide an use assembled UHPC structure as the tunnel secondary lining of die block.

In order to solve the technical problem, the technical scheme of the utility model is that: a tunnel secondary lining taking an assembled UHPC structure as a bottom die comprises UHPC rib plate beam sections which are respectively assembled on a tunnel left side wall section, a tunnel right side wall section and a tunnel arch top section, and the assembled UHPC structure is integrally formed to serve as the bottom die of the tunnel secondary lining, and the interior of the bottom die and a reinforcing mesh on the outer side of the secondary lining are cast into a whole.

Preferably, UHPC rib plate beam segments of the left side wall segment and the right side wall segment are respectively assembled to the left end and the right end of an inverted arch, and the inverted arch is of a prefabricated or cast-in-place reinforced concrete structure.

Preferably, the UHPC rib plate beam segments of the vault segments are hung and assembled on the bracket of the UHPC rib plate beam segments of the left side wall segment and the right side wall segment to form an assembled UHPC structure which is connected in a ring-by-ring mode along the longitudinal direction of the tunnel.

Preferably, the splicing parts of the UHPC rib plate beam segments and the inverted arch of the left side wall segment and the right side wall segment are connected by using anchor rods, the splicing parts of the adjacent UHPC rib plate beam segments are connected by using anchor rods, and all the splicing parts are provided with waterproof sealing gaskets.

Preferably, the UHPC rib plate beam segments all comprise bottom plates with longitudinal arcs consistent with the inner contour of the tunnel, a plurality of rib plates and a plurality of transverse partition plates are fixedly arranged on the bottom plates along the arc tracks of the bottom plates, steel reinforcement frameworks are arranged in the bottom plates, the rib plates and the transverse partition plates, and the rib plates and the transverse partition plates are located in the bottom die.

Preferably, the bottom of each rib plate is provided with a plurality of round holes for penetrating the reinforcing steel bars; and a common concrete layer is poured inside the reinforcing mesh on the outer side of the secondary lining and the bottom die.

Preferably, the side of the bottom die is provided with a grouting working hole.

Compared with the prior art, the utility model discloses following beneficial effect has: the ultrahigh compressive strength, high crack resistance, impermeability, freeze-thaw resistance and high durability of the UHPC are fully exerted, and the dimensional accuracy and quality of the prefabricated segment component can be ensured; the mechanized assembly in the holes can shorten the construction period and improve the labor conditions; the assembled ring can be used as a non-dismantling template for pouring concrete, bear the self weight of grouting and cast-in-place concrete, reduce the binding workload of the reinforcement cage in the inner cavity and save a large amount of supporting materials and labor. Simultaneously the utility model discloses simple structure, reasonable in design, construction convenience, but wide application improves efficiency of construction and life in tunnel structure.

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Drawings

Fig. 1 is a schematic elevation view of an assembled UHPC structure according to an embodiment of the present invention.

Fig. 2 is a schematic cross-sectional view of a secondary lining of a tunnel according to an embodiment of the present invention.

Detailed Description

The present invention will be further explained with reference to the drawings and the embodiments.

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

As shown in fig. 1 to 2, the embodiment provides a tunnel secondary lining using an assembled UHPC structure as a bottom formwork, which includes UHPC rib plate beam segments 100 respectively assembled on a left wall segment 1, a right wall segment 2 and a vault segment 3 of a tunnel, and an integrally formed assembled UHPC structure 200 as a bottom formwork of the tunnel secondary lining, wherein the interior of the bottom formwork is integrally cast with a reinforcing mesh 21 on the outer side of the secondary lining. The assembled UHPC structure is used as a non-dismantling bottom die of tunnel secondary lining cast-in-place concrete and participates in the stress of the secondary lining. The tunnel structure has the advantages of simple structure, reasonable design and convenient construction, can shorten the construction period, save the construction supporting materials and improve the labor conditions, can be widely applied to the tunnel structure, and improves the construction efficiency and the service life.

The embodiment of the utility model provides an in, both ends about 4 inverted arches are assembled respectively to the UHPC floor beam segment section of left side wall segment and right side wall segment, and the inverted arch is prefabricated or cast-in-place reinforced concrete structure.

The embodiment of the utility model provides an in, the UHPC floor beam segment section of vault segment hangs and assembles to left side wall segment section and right side wall segment's UHPC floor beam segment section bracket on, forms the assembled UHPC structure that connects a ring along tunnel longitudinal direction one ring.

The embodiment of the utility model provides an in, the concatenation department of UHPC floor beam segment section and the inverted arch of left side wall segment section, right side wall segment section need be connected with stock 5, and the concatenation department of adjacent UHPC floor beam segment section needs to be connected with the stock, and all concatenations department establishes waterproof sealing pad 18.

The embodiment of the utility model provides an in, UHPC floor beam segment section all includes the unanimous bottom plate 11 of interior profile of longitudinal arc line and tunnel, and the bottom plate has set firmly a plurality of floor 12 and a plurality of cross slab 13 along its pitch arc orbit, and bottom plate, floor and cross slab are inside all disposes framework of steel reinforcement 14, and floor and cross slab all are located the inside of die block.

In the embodiment of the present invention, the bottom of the rib plate is provided with a plurality of round holes 15 for penetrating the reinforcing steel bars 16; and a common concrete layer 22 is poured inside the reinforcing mesh and the bottom die on the outer side of the secondary lining.

In the embodiment of the present invention, the side of the bottom mold is provided with a grouting hole 17.

A construction method of a tunnel secondary lining taking an assembled UHPC structure as a bottom die comprises the following steps: (1) according to the actual field situation and the technological requirements, the cross section of the tunnel supporting structure is divided into four parts, including a left side wall section, a right side wall section, a vault section and an inverted arch; (2) after the full-section excavation, performing cast-in-place construction or prefabricating and hoisting an inverted arch; (3) binding a bottom plate, a rib plate and a steel reinforcement framework of a diaphragm plate of the UHPC rib plate beam segment, and pouring concrete of the UHPC rib plate beam segment; (4) binding a reinforcing mesh on the outer side of the secondary lining of the tunnel; (5) after the UHPC rib plate beam segment is maintained to reach the strength, the UHPC rib plate beam segment is transported into a tunnel and is mechanically spliced; (6) the left side wall section and the right side wall section are respectively assembled to the left end and the right end of the inverted arch; (7) the vault sections are hung and assembled on the brackets of the left side wall section and the right side wall section to form an assembled UHPC structure which is connected with each other in a ring-to-ring mode along the longitudinal direction of the tunnel; (8) the splicing positions of the left side wall segment, the right side wall segment, the vault segment and the inverted arch are connected by using anchor rods, and waterproof sealing gaskets are required to be arranged at the splicing positions; (9) and (3) taking the assembled UHPC structure as a bottom die, and casting common concrete in situ to form a secondary lining of the tunnel so as to finish construction and manufacturing.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical substance of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims

1. The utility model provides an use tunnel secondary lining of assembled UHPC structure as die block which characterized in that: the prefabricated UHPC floor beam section is integrally formed and is used as a bottom die of a secondary lining of the tunnel, and the interior of the bottom die and a reinforcing mesh on the outer side of the secondary lining are poured into a whole.

2. The secondary tunnel lining with the fabricated UHPC structure as the bottom mold according to claim 1, wherein: UHPC floor beam segments of the left side wall segment and the right side wall segment are respectively assembled to the left end and the right end of an inverted arch, and the inverted arch is of a prefabricated or cast-in-place reinforced concrete structure.

3. The secondary tunnel lining with the fabricated UHPC structure as the bottom mold according to claim 1, wherein: and the UHPC rib plate beam segments of the vault segments are hung and assembled on the bracket of the UHPC rib plate beam segments of the left side wall segment and the right side wall segment to form an assembled UHPC structure which is connected with one another in a ring-to-ring mode along the longitudinal direction of the tunnel.

4. The secondary tunnel lining with the fabricated UHPC structure as the bottom mold according to claim 1, wherein: the splicing parts of the UHPC rib plate beam segments and the inverted arches of the left side wall segment and the right side wall segment need to be connected by using anchor rods, the splicing parts of the adjacent UHPC rib plate beam segments need to be connected by using anchor rods, and all the splicing parts are provided with waterproof sealing gaskets.

5. The secondary tunnel lining with the fabricated UHPC structure as the bottom mold according to claim 1, wherein: the UHPC rib plate beam sections comprise bottom plates with longitudinal arcs consistent with the inner contour of the tunnel, a plurality of rib plates and a plurality of transverse partition plates are fixedly arranged on the bottom plates along the arc tracks of the bottom plates, steel reinforcement frameworks are arranged in the bottom plates, the rib plates and the transverse partition plates, and the rib plates and the transverse partition plates are located in the bottom die.

6. The secondary tunnel lining with the fabricated UHPC structure as the bottom die of claim 5, wherein: the bottom of the rib plate is provided with a plurality of round holes for penetrating the reinforcing steel bars.

7. The secondary tunnel lining with the fabricated UHPC structure as the bottom mold according to claim 1, wherein: the side part of the bottom die is provided with a grouting working hole.