CN211777472U

CN211777472U - High-strength tunnel segment composite connection structure

Info

Publication number: CN211777472U
Application number: CN201922474471.7U
Authority: CN
Inventors: 蒋亮
Original assignee: Wuxi Kuailu Subway Steel Structure Manufacturing Co ltd
Current assignee: Wuxi Kuailu Subway Steel Structure Manufacturing Co ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-10-27
Anticipated expiration: 2029-12-31

Abstract

The utility model relates to a high-strength tunnel segment composite connection structure, which comprises high-strength tunnel segments, wherein the high-strength tunnel segments are connected with each other through bent bolts and concrete; the high-strength tunnel segment is provided with a threaded hole, and the threaded hole is communicated with the counter bore; the bolt is bent into an arc shape, one end of the bolt is a bolt head, the other end of the bolt is a linear bolt section, and the linear bolt section is connected with a locking nut; the outer side of the head of the bolt is provided with a bolt inclined plane, and the outer side of the locking nut is provided with a nut inclined plane. The utility model discloses, simple structure adopts the bolt to be connected with the concrete, and joint strength is high, has assembled the advantage of steel with the concrete, and economic nature is good, low in production cost, and weight is moderate, through the design of through-hole, makes bulk connection intensity high, and the slip casting mouth sets up the screw thread, makes things convenient for the handling.

Description

High-strength tunnel segment composite connection structure

Technical Field

The utility model belongs to the technical field of the tunnel construction, a high strength tunnel section of jurisdiction composite connection structure is related to.

Background

The shield segment is a main assembly component for shield construction, is the outermost barrier of the tunnel and plays a role in resisting soil layer pressure, underground water pressure and some special loads. The shield segment is a permanent lining structure of a shield tunnel, and the quality of the shield segment is directly related to the overall quality and safety of the tunnel, so that the waterproof performance and the durability of the tunnel are affected. The shield segment is usually produced by adopting high-strength impervious concrete so as to ensure reliable bearing performance and waterproof performance, and a finished segment mould is produced and utilized to be molded after the concrete is hermetically poured.

At present, the tunnel constructed by the shield type heading machine generally adopts prefabricated reinforced concrete segments to carry out lining, and a special tunnel section adopts pure steel segments, but along with the appearance of large burial depth and long-distance tunnel, the structural stress condition of the tunnel is more and more complex, so that the novel shield segment structure with high safety, high usability, high constructability, high environmental protection, high maintenance, high durability and the like is the core strategy of the development of future structural engineering and is also the necessary way for sustainable development. In order to meet the requirements of high safety, high maintenance, high durability and high constructability of a tunnel structure, the current pure steel pipe piece has the main characteristics of high strength, good ductility and light weight, but small overall rigidity, poor corrosion resistance and high manufacturing cost; reinforced concrete section of jurisdiction needs artifical ligature a large amount of reinforcing bars at prefabricated in-process, and the process is loaded down with trivial details, and production efficiency is low, and reinforced concrete section of jurisdiction needs to set up rubber sealing rod in addition and satisfies the stagnant water or the requirement of only starching of tunnel, and the rubber sealing rod is ageing easily, has greatly influenced the later stage safe operation of tunnel.

When the section of jurisdiction adopted bent bolt to practice the level, because the existence of camber is that the section of jurisdiction inner panel exists the concave part, and the section of jurisdiction exists the atress section, and bulk strength is poor.

Disclosure of Invention

An object of the utility model is to provide a high strength tunnel section of jurisdiction composite connection structure can solve foretell problem, and overall connection intensity is high.

According to the utility model provides a technical scheme: a high-strength tunnel segment composite connection structure comprises high-strength tunnel segments, wherein the high-strength tunnel segments are connected with concrete through bent bolts; the high-strength tunnel segment is provided with a threaded hole, and the threaded hole is communicated with the counter bore; the bent bolt is arc-shaped, one end of the bent bolt is a bolt head, the other end of the bent bolt is a linear bolt section, and the linear bolt section is connected with a locking nut; the outer side of the head of the bolt is provided with a bolt inclined plane, and the outer side of the locking nut is provided with a nut inclined plane.

As a further improvement of the utility model, the front end and the rear end of the duct piece are a front plate and a rear plate, the inner side and the outer side of the duct piece are respectively provided with an inner plate and an outer plate, the side surface of the duct piece is provided with a side plate, the front plate, the rear plate, the inner plate, the outer plate and the side plate form an inner cavity, a baffle is arranged in the inner cavity, and the baffle divides the inner cavity into a left cavity and a right cavity; set up the slip casting pipe in the baffle, it has the grout hole to open in the slip casting pipe, grout hole opening goes out to set up the dress thread section, it has left grout hole and right grout hole to open on the curb plate, left side grout hole intercommunication left side chamber, right side grout hole intercommunication right side chamber, it establishes the concrete to fill in the inner chamber.

As a further improvement of the utility model, the front plate is provided with a front through hole, and the rear plate is provided with a rear through hole.

As a further improvement of the utility model, the waterproof pad mounting groove is opened in the back plate outside.

As a further improvement of the utility model, the outer plate is coated with a heat insulation layer.

As a further improvement of the utility model, the thermal insulation layer material is polyurethane.

As a further improvement of the utility model, the front plate, the rear plate, the inner plate, the outer plate and the side plate are made of steel.

As a further improvement of the utility model, the front plate, the rear plate, the inner plate, the outer plate and the side plate are stainless steel plates.

As a further improvement of the utility model, the thickness of the front plate, the rear plate, the inner plate, the outer plate and the side plates is between 5mm to 15 mm.

As a further improvement, the concrete is composed of high-strength cement, coarse sand, fine sand, stones, water, a polycarboxylic acid water reducing agent and a defoaming agent.

Compared with the prior art, the utility model, have following advantage:

the utility model discloses, simple structure adopts the bolt to be connected with the concrete, and joint strength is high, has assembleed steel and concrete to have a little, and economic nature is good, low in production cost, and weight is moderate, through the design of through-hole, makes bulk connection intensity high, and the slip casting mouth sets up the screw thread, makes things convenient for the handling.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural view of the bent bolt of the present invention.

Fig. 3 is a schematic structural diagram of the locking nut of the present invention.

Fig. 4 is a schematic structural view of the duct piece of the present invention.

Detailed Description

The following description will further describe embodiments of the present invention with reference to the accompanying drawings.

In the figures 1-4, the waterproof gasket comprises a front plate 1, a front through hole 1-1, a rear plate 2, a rear through hole 2-1, a waterproof gasket mounting groove 2-2, an inner plate 3, an outer plate 4, a partition plate 5, a grouting hole 6, a grouting pipe 7, a left cavity 8, a right cavity 9, a left grouting hole 10, a right grouting hole 11, a bent bolt 12, a bolt head 12-1, a bolt inclined plane 12-2, a linear bolt section 12-3, a locking nut 13, a nut inclined plane 13-1, a threaded hole 14, a counter bore 15 and the like.

As shown in fig. 1, the utility model relates to a high strength tunnel section of jurisdiction composite connection structure, including the high strength tunnel section of jurisdiction, connect through curved bolt and concrete between the high strength tunnel section of jurisdiction. The high-strength tunnel pipe piece (inner piece) is provided with a threaded hole 14, and the threaded hole 14 is communicated with a counter bore 15.

As shown in fig. 2, is a schematic view of the bent bolt of the present invention. A bent bolt 12 with the total length of 400mm and the diameter of 27mm is bent into an arc shape, the radius of the arc shape is 360mm, one end of the bent bolt is a bolt head 12-1, and the other end of the bent bolt is a linear bolt section 12-3 and is connected with a locking nut 13.

The bolt inclined plane 12-2 is arranged on the outer side of the bolt head 12-1, as shown in fig. 3, the nut inclined plane 13-1 is arranged on the outer side of the locking nut 13, and by means of the structure, the duct piece is free from a cavity, the duct piece is guaranteed to be stressed evenly, and a stressed section is avoided.

As shown in fig. 4, the high-strength tunnel segment is composed of six plates, including a front plate 1 and a rear plate 2, wherein the front plate 1 and the rear plate 2 are located at the front and rear ends of the segment, the front plate 1 contacts with the segment in the previous ring, and the rear plate 2 contacts with the segment in the subsequent ring.

The inner plate 3 and the outer plate 4 are arranged inside and outside the duct piece respectively, the outer plate 4 is directly contacted with the grouting layer, the inner plate 3 is a part of a tunnel lining, and the tunnel lining refers to a permanent structure for supporting and maintaining the long-term stability and durability of the tunnel. The function is as follows: supporting and maintaining the stability of the tunnel; the space required by the train operation is kept; preventing the weathering of the surrounding rock; relieving the influence of underground water, etc. Therefore, the tunnel lining must have sufficient strength, durability, and certain resistance to freezing, permeability, and erosion. The tunnel lining is mainly composed of an arch ring, side walls, an inverted arch and a bottom plate. In order to discharge water in the tunnel, a drainage ditch is also arranged in the tunnel.

The section of jurisdiction both sides set up the curb plate (not marked), and front bezel 1, back plate 2, inner panel 3, planking 4, curb plate have constituted the inner chamber, set up baffle 5 in the inner chamber, and baffle 5 divides into left chamber 8 and right chamber 9 with the inner chamber.

The partition board 5 is provided with grouting holes 6, and the grouting holes 6 are formed by embedding grouting pipes 7 in the production of the pipe piece. The grouting pipe 7 is specially manufactured, and the grouting hole 6 is used for repairing defects. When the synchronous grouting can not meet the design requirements (namely, the conditions of sedimentation, leakage and the like occur), the residual 50mm segment wall is chiseled manually, a grouting device is connected, and mortar with the selected proportion is injected. And after grouting is finished, tightening the sealing plug of the grouting hole for sealing. The opening of the grouting hole 6 is positioned on the inner plate 3, and the opening of the grouting hole 6 is provided with a hoisting thread section 6-1 which can be used for being connected with hoisting equipment to hoist and convey the pipe piece.

A left grouting hole 10 and a right grouting hole 11 are formed in the side plate, the left grouting hole 10 is communicated with the left cavity 8, and the right grouting hole 11 is communicated with the right cavity 9.

The front plate 1 is provided with a front through hole 1-1, and the rear plate 2 is provided with a rear through hole 2-1. The front through hole 1-1 communicates the right cavity 9 of the duct piece with the left cavity of the adjacent duct piece, and the rear through hole 2-1 communicates the left cavity 8 of the duct piece with the right cavity of the adjacent duct piece.

The outer side of the back plate 2 is provided with a waterproof pad installation groove 2-2.

The outer plate 4 is coated with a heat insulating layer made of polyurethane.

The front plate 1, the rear plate 2, the inner plate 3, the outer plate 4 and the side plates are all made of steel, the steel plate can be made of common steel plates or stainless steel plates according to design requirements, and the thickness of the steel plate is selected from 5 mm-15 mm according to structural stress requirements.

The working process of the utility model is as follows:

the arrow in the figure shows the excavating direction of the shield tunneling machine, after the front-end cutter head of the shield tunneling machine finishes one-time excavation, the duct piece is conveyed to the embedding station, the front plate 1 is pushed to the duct piece of the previous ring, the front through hole and the rear through hole are connected, and concrete with the pouring strength grade of C30-C60 is placed from the right grouting hole 11 and then sealed.

The concrete has the following formula: high-strength cement with the mass fraction of 14 percent is used as a base material for the strength of the shield segment; coarse sand, wherein the fineness modulus of the coarse sand is 2.8, and the mass fraction of the coarse sand is 26%; 8.5% of fine sand, wherein the mass fraction of the fine sand is 8.5%, and the mass ratio of the fine sand with the particle size of less than or equal to 0.315mm to the coarse sand is 0.15: 1; through the restriction of coarse sand and fine sand particle diameter and mass ratio, the gap between the coarse sand has been filled to the fine sand for concrete porosity because of sand formation reduces, thereby makes the section of jurisdiction after the shaping more closely knit, has reduced the formation of bubble. 35% of stones serving as main components of the concrete; water, the mass fraction is 10%; the polycarboxylate superplasticizer with the mass fraction of 2.5 percent is used as the water reducing agent, so that the segment can be quickly molded and has less bubbles; and the defoaming agent accounts for 1% by mass, so that bubbles in the segment forming process are further eliminated. The concrete has mud content of 0.4%, needle-shaped particles content of 3%, sulfide and sulfate content of 0.6%, and good compression resistance.

The right cavity 9 and the left cavity of the adjacent duct piece are filled with concrete, so that the front duct piece and the rear duct piece are integrated, the strength is high, and the waterproof pad in the waterproof pad mounting groove 2-2 can prevent water seepage between the adjacent duct pieces.

Claims

1. The utility model provides a high strength tunnel section of jurisdiction composite connection structure which characterized in that: the structure comprises high-strength tunnel segments, wherein the high-strength tunnel segments are connected with concrete through bent bolts; the high-strength tunnel segment is provided with a threaded hole (14), and the threaded hole (14) is communicated with a counter bore (15); the bent bolt (12) is arc-shaped, one end of the bent bolt (12) is a bolt head (12-1), the other end of the bent bolt is a linear bolt section (12-3), and the linear bolt section (12-3) is connected with a locking nut (13); the outer side of the bolt head (12-1) is provided with a bolt inclined plane (12-2), and the outer side of the locking nut (13) is provided with a nut inclined plane (13-1).

2. The high-strength composite connecting structure for tunnel segments according to claim 1, wherein: the front end and the rear end of the high-strength tunnel duct piece are respectively provided with a front plate (1) and a rear plate (2), an inner plate (3) and an outer plate (4) are respectively arranged inside and outside the duct piece, side plates are arranged on the side faces of the duct piece, the front plate (1), the rear plate (2), the inner plate (3), the outer plate (4) and the side plates form an inner cavity, a partition plate (5) is arranged in the inner cavity, and the inner cavity is divided into a left cavity (8) and a right cavity (9) by the partition plate (5); set up slip casting pipe (7) in baffle (5), it has grout hole (6) to open in slip casting pipe (7), grout hole (6) opening sets up dress thread section (6-1), it has left grout hole (10) and right grout hole (11) to open on the curb plate, left side grout hole (10) intercommunication left side chamber (8), right side grout hole (11) intercommunication right side chamber (9), it establishes the concrete to fill in the inner chamber.

3. The high-strength composite connecting structure for tunnel segments according to claim 2, wherein: the front plate (1) is provided with a front through hole (1-1), and the rear plate (2) is provided with a rear through hole (2-1).

4. The high-strength composite connecting structure for tunnel segments according to claim 2, wherein: the outer side of the rear plate (2) is provided with a waterproof pad mounting groove (2-2).

5. The high-strength composite connecting structure for tunnel segments according to claim 2, wherein: the outer plate (4) is coated with a heat insulation layer.

6. The high-strength composite connecting structure for tunnel segments according to claim 5, wherein: the material of the heat insulation layer is polyurethane.

7. The high-strength composite connecting structure for tunnel segments according to claim 2, wherein: the front plate (1), the rear plate (2), the inner plate (3), the outer plate (4) and the side plates are all made of steel.

8. The high-strength composite connecting structure for tunnel segments according to claim 7, wherein: the front plate (1), the rear plate (2), the inner plate (3), the outer plate (4) and the side plates are all stainless steel plates.

9. The high-strength composite connecting structure for tunnel segments according to claim 2, wherein: the thickness of the front plate (1), the rear plate (2), the inner plate (3), the outer plate (4) and the side plates is 5-15 mm.

10. The high-strength composite connecting structure for tunnel segments according to claim 1, wherein: the concrete is composed of high-strength cement, coarse sand, fine sand, stones, water, a polycarboxylic acid water reducing agent and a defoaming agent.