CN211422661U - Large-scale solution cavity punishment structure under tunnel bottom plate - Google Patents

Large-scale solution cavity punishment structure under tunnel bottom plate Download PDF

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Publication number
CN211422661U
CN211422661U CN201922289356.2U CN201922289356U CN211422661U CN 211422661 U CN211422661 U CN 211422661U CN 201922289356 U CN201922289356 U CN 201922289356U CN 211422661 U CN211422661 U CN 211422661U
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China
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arch bridge
formwork
arch
bridge
karst cave
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CN201922289356.2U
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王新泉
刁红国
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Zhejiang University City College ZUCC
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Zhejiang University City College ZUCC
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Abstract

The utility model relates to a large-scale karst cave treatment structure under a tunnel bottom plate, which comprises an arch bridge crossing structure, an arch pier and arch bridge formwork system, and a temporary trestle and construction channel system; the arch bridge span structure comprises an arch bridge, arch piers and a large karst cave, wherein the arch piers are built on two sides of the large karst cave, the arch bridge is erected on the arch piers to span the large karst cave, and a tunnel bottom plate is built on the arch bridge; the arch pier and arch bridge formwork system is composed of an arch bridge formwork, an arch pier formwork and a formwork scaffold, wherein the arch bridge formwork comprises an arch bridge bottom formwork and arch bridge side formworks, the arch bridge bottom formwork is assembled and fixed with the convex end of the arch bridge bottom formwork through the concave end of the arch bridge bottom formwork, and the arch bridge side formworks are assembled and fixed with the concave end of the arch bridge side formwork through the convex end of the arch bridge side formwork. The utility model has the advantages that: the utility model provides an arch bridge stridees across structure and compares in truss structure simple structure, span great relatively, more economy, and compressive property is better moreover, and good stability is higher.

Description

Large-scale solution cavity punishment structure under tunnel bottom plate
Technical Field
The utility model relates to a tunnel engineering field, in particular to large-scale solution cavity punishment structure under tunnel bottom plate.
Background
The karst geology of China is mainly and intensively distributed in parts of areas such as the cloud, the noble, the three-province, the Shuangguang and the two lakes, and the like, along with the rapid development of the economy of China and the deep implementation of the western major development strategy, the construction strength of the infrastructure of the areas is continuously increased, and the continuous planning construction of large-scale highway and railway engineering needs to deal with a large number of engineering problems caused by the karst geology, particularly the karst tunnel engineering problem. Due to the improvement of the design standard of the railway, the large and deep buried karst tunnel is inevitably generated due to the limitation of the longitudinal slope and the curve radius of the line. Meanwhile, due to the limitation of a survey technical means and a survey period and the irregularity of karst development, the concrete karst forms of the tunnel passing through the section are difficult to be completely found in a survey design stage, and the karst probability of different forms and different damages is extremely high in the tunnel construction process, so that a large karst cave is formed below a tunnel bottom plate in the karst tunnel construction process, the large karst cave is treated, and the construction quality and the tunnel operation safety are guaranteed to be very important. At present, no relevant patent is provided for how to treat the large karst cave under the tunnel floor.
Therefore, at present, a large karst cave under a tunnel bottom plate can be effectively treated, and a structure for treating the large karst cave under the tunnel bottom plate, which is rapid in construction and high in stability, is needed to be found out.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the not enough among the prior art, provide a large-scale solution cavity punishment structure under tunnel bottom plate.
The large karst cave treatment structure under the tunnel bottom plate comprises an arch bridge spanning structure, an arch pier and arch bridge formwork system, a temporary trestle and a construction channel system; the arch bridge span structure comprises an arch bridge, arch piers and a large karst cave, wherein the arch piers are built on two sides of the large karst cave, the arch bridge is erected on the arch piers to span the large karst cave, and a tunnel bottom plate is built on the arch bridge; the arch pier and arch bridge formwork system consists of an arch bridge formwork, an arch pier formwork and a formwork scaffold, wherein the arch bridge formwork comprises an arch bridge bottom formwork and arch bridge side formworks, the arch bridge bottom formwork is spliced and fixed with the convex end of the arch bridge bottom formwork through the concave end of the arch bridge bottom formwork, the arch bridge side formworks are spliced and fixed with the concave end of the arch bridge side formwork through the convex end of the arch bridge side formwork, and the arch bridge formwork and the arch pier formwork are supported by the formwork scaffold; the temporary trestle and the construction channel system comprise a hydraulic lifting device, a trestle construction channel support frame, a platform longitudinal beam, a platform plate and guardrails, the hydraulic lifting device is arranged on two sides of the large karst cave, the trestle construction channel support frame assembled by steel columns and web members is arranged on the hydraulic lifting device, the platform longitudinal beam is arranged on the trestle construction channel support frame, the platform plate is laid on the platform longitudinal beam, and the guardrails are arranged outside the platform plate.
Preferably, the method comprises the following steps: the arch bridge span structure is a reinforced concrete structure.
The utility model has the advantages that:
(1) the utility model provides an arch bridge stridees across structure and compares in truss structure simple structure, span great relatively, more economy, and compressive property is better moreover, and good stability is higher.
(2) The utility model provides an interim landing stage can provide a construction platform for the formwork of arched bridge and pouring with the construction passageway system, sets up simply moreover, can improve the efficiency of construction greatly, has better technical benefit.
(3) The utility model provides an it is simple to assemble with arched bridge formwork system template that encircle the mound, and the formwork is swift, and the atress is better, and technical benefit is showing.
Drawings
FIG. 1 is a schematic view of a large karst cave treatment structure under a tunnel floor;
FIG. 2 is a schematic view of a formwork system for an arch pier and an arch bridge;
FIG. 3 is a schematic view of an arch bridge bottom form unit;
FIG. 4 is a schematic view of an arch bridge sideform unit;
fig. 5 is a schematic view of a temporary trestle and a construction channel system.
Description of reference numerals: 1-arch bridge; 2-arch pier; 3, large karst cave; 4-arch bridge template; 5, an arch pier template; 6, tunnel bottom plate; 7-platform stringer; 8-web member; 9-steel column; 10, a guardrail; 11-a platform plate; 12-a hydraulic lifting device; 13-supporting a formwork scaffold; 14-concave end of bottom template of arch bridge; 15-convex end of bottom template of arch bridge; 16-convex end of side template of arch bridge; 17-concave end of side formwork of arch bridge.
Detailed Description
The present invention will be further described with reference to the following examples. The following description of the embodiments is merely provided to aid in understanding the invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.
The large karst cave treatment structure under the tunnel bottom plate comprises an arch bridge spanning structure, an arch pier and arch bridge formwork system, a temporary trestle and a construction channel system; the arch bridge span structure comprises an arch bridge 1, arch piers 2 and a large karst cave 3, wherein the arch piers 2 are built on two banks of the large karst cave 3, the arch bridge 1 is erected on the arch piers 2 to span the large karst cave 3, and a tunnel bottom plate 6 is built on the arch bridge 1; the arch pier and arch bridge formwork system consists of an arch bridge formwork 4, an arch pier formwork 5 and a formwork scaffold 13, wherein the arch bridge formwork 4 comprises an arch bridge bottom formwork and arch bridge side formworks, the arch bridge bottom formwork is spliced and fixed with a convex end 15 of the arch bridge bottom formwork through a concave end 14 of the arch bridge bottom formwork, the arch bridge side formworks are spliced and fixed with a concave end 17 of the arch bridge side formwork through a convex end 16 of the arch bridge side formwork, the arch bridge formwork 4 is supported by the formwork scaffold 13, and the formwork scaffold 13 is arranged at the position of the arch pier formwork 5; interim landing stage and construction passageway system include hydraulic pressure elevating gear 12, landing stage construction passageway support frame, platform longeron 7, landing slab 11 and guardrail 10, 3 two banks in large-scale solution cavity set up hydraulic pressure elevating gear 12, be provided with the landing stage construction passageway support frame of assembling by steel column 9 and web member 8 on hydraulic pressure elevating gear 12, set up platform longeron 7 on the landing stage construction passageway support frame, lay landing slab 11 on platform longeron 7, the landing slab 11 outside sets up guardrail 10.
The temporary trestle and the construction channel system can be used as a construction operation platform and a light material stacking site, and a scaffold can be erected on the system.
The arch bridge span structure is a reinforced concrete structure.
The construction method of the large karst cave treatment structure under the tunnel bottom plate comprises the following steps:
(1) and constructing the temporary trestle and the construction channel system. The construction method comprises the steps of arranging hydraulic lifting devices 12 on two banks of a large karst cave 3 of an arch bridge caving structure to be built, assembling a trestle construction channel support frame on the hydraulic lifting devices 12 by adopting steel columns 9 and web members 8, arranging platform longitudinal beams 7 on the trestle construction channel support frame, laying platform plates 11 on the platform longitudinal beams 7, and finally arranging enclosure guardrails 10 on the outer sides of the platform longitudinal beams, wherein the enclosure guardrails are shown in figure 5.
(2) And constructing an arch pier and arch bridge formwork system. The arch bridge bottom template is assembled and fixed by the concave end 14 of the arch bridge bottom template and the convex end 15 of the arch bridge bottom template, the arch bridge side template is assembled and fixed by the convex end 16 of the arch bridge side template and the concave end 17 of the arch bridge side template, the arch bridge bottom template and the arch bridge side templates are assembled to form the arch bridge template 4, and the arch bridge template 4 and the arch pier template 5 are supported by a formwork supporting scaffold 13, as shown in figure 2.
(3) And constructing the arch bridge spanning structure. The method comprises the steps of building the arch piers 2 on two sides of the large karst cave 3, and erecting the arch bridge 1 on the arch piers 2 to cross the large karst cave 3, as shown in figure 1.
(4) And constructing a tunnel bottom plate. The construction of the tunnel floor 6 is performed on the arch bridge spanning structure as shown in fig. 1.

Claims (2)

1. Large-scale solution cavity punishment structure under tunnel bottom plate, its characterized in that: the system comprises an arch bridge spanning structure, an arch pier and arch bridge formwork system, a temporary trestle and a construction channel system; the arch bridge span structure comprises an arch bridge (1), arch piers (2) and a large karst cave (3), the arch piers (2) are built on two sides of the large karst cave (3), the arch bridge (1) is erected on the arch piers (2) to span the large karst cave (3), and a tunnel bottom plate (6) is built on the arch bridge (1); the arch pier and arch bridge formwork system consists of an arch bridge formwork (4), an arch pier formwork (5) and a formwork scaffold (13), wherein the arch bridge formwork (4) comprises an arch bridge bottom formwork and arch bridge side formworks, the arch bridge bottom formwork is spliced and fixed with a convex end (15) of the arch bridge bottom formwork through a concave end (14) of the arch bridge bottom formwork, the arch bridge side formworks are spliced and fixed with a concave end (17) of the arch bridge side formwork through a convex end (16) of the arch bridge side formwork, and the arch bridge formwork (4) and the arch pier formwork (5) are supported by the formwork scaffold (13); interim landing stage and construction passageway system include hydraulic pressure elevating gear (12), landing stage construction passageway support frame, platform longeron (7), landing slab (11) and guardrail (10), large-scale solution cavity (3) both sides set up hydraulic pressure elevating gear (12), be provided with the landing stage construction passageway support frame of assembling by steel column (9) and web member (8) on hydraulic pressure elevating gear (12), set up platform longeron (7) on the landing stage construction passageway support frame, lay landing slab (11) on platform longeron (7), landing slab (11) outside sets up guardrail (10).
2. The structure of claim 1, wherein the structure is arranged below the tunnel floor and used for treating the large karst cave, and the structure comprises: the arch bridge span structure is a reinforced concrete structure.
CN201922289356.2U 2019-12-18 2019-12-18 Large-scale solution cavity punishment structure under tunnel bottom plate Active CN211422661U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201922289356.2U CN211422661U (en) 2019-12-18 2019-12-18 Large-scale solution cavity punishment structure under tunnel bottom plate

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Application Number Priority Date Filing Date Title
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CN211422661U true CN211422661U (en) 2020-09-04

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112610222A (en) * 2020-12-16 2021-04-06 中铁十四局集团建筑工程有限公司 Karst cave backfilling method and tunnel construction method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112610222A (en) * 2020-12-16 2021-04-06 中铁十四局集团建筑工程有限公司 Karst cave backfilling method and tunnel construction method

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