Risk-avoiding construction channel for leading existing train tunnel to transverse channel and construction supporting method of risk-avoiding construction channel

Abstract

The invention relates to a danger-avoiding construction channel leading from an existing train tunnel to a transverse channel and a construction supporting method of the danger-avoiding construction channel. The danger-avoiding construction channel comprises a special-shaped channel shell, buckles and expansion bolts. The special-shaped channel shell is of a strip-shaped channel structure which is closed in the circumferential direction and provided with two open ends, and the buckle is arranged on the outer side face of the special-shaped channel shell. The expansion bolts are arranged on the side wall, close to the transverse channel, in the tunnel in advance. When the transverse channel needs to be constructed, the special-shaped channel shell is hung on the expansion bolts on the side wall in the tunnel through the buckles. The transverse channel is effectively isolated from a train rail running area, piston wind generated by train running is prevented from influencing the transverse channel, the construction channel leading to the transverse channel is constructed, construction materials can be transported into the existing tunnel during train running, constructors can safely pass, and the construction efficiency is improved. The construction safety in the existing train tunnel is guaranteed, and the construction efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel engineering, and in particular to a risk avoidance construction passage leading to a transverse passage from an existing train tunnel and a construction support method thereof. Background Art

[0002] There is a interconnected cross passage between the two parallel tunnels for the train. According to relevant specifications, all cross passages in the tunnel should be equipped with protective doors and reinforced concrete door frame walls.

[0003] After the tunnel was put into service, trains began to operate. However, during the operation phase, there were also some related construction needs in the cross passage, which required the transportation of construction materials and construction personnel into the cross passage. Due to the operation of the train, piston wind pressure would be generated from time to time inside the tunnel. On-site measurements showed that at a speed of 120 kilometers per hour, the wind pressure value of the door frame wall in the cross passage could reach 1600-2000Pa. If there was no protection, construction was prohibited in the tunnel.

[0004] Therefore, it is necessary to propose new measures to improve the safety of cross-channel construction without affecting train operations. Summary of the invention

[0005] The purpose of the present invention is to provide a risk avoidance construction passage leading to a cross passage from an existing train tunnel and a construction support method thereof, so as to solve the safety problem of the cross passage construction during the train operation stage.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is:

[0007] An existing train tunnel leading to a cross passage is provided with a danger avoidance construction passage, the danger avoidance construction passage comprising a special-shaped passage shell, buckles and expansion bolts;

[0008] The special-shaped channel shell is a strip-shaped channel structure that is annularly closed and open at both ends, and the buckle is arranged on the outer side of the special-shaped channel shell;

[0009] The expansion bolts are pre-arranged on the inner side wall of the tunnel close to the transverse passage;

[0010] When the transverse passage needs to be constructed, the special-shaped passage housing is hung on the expansion bolts on the inner side wall of the tunnel through the buckle.

[0011] Furthermore, a vertical support column is provided at the bottom of the special-shaped channel shell, and the support column supports the special-shaped channel shell on the cable trough cover plate on one side of the tunnel, and an overhead layer is formed between the bottom of the special-shaped channel shell and the cable trough cover plate.

[0012] Furthermore, the special-shaped channel shell includes a top plate, a bottom plate, an inner vertical plate and an outer arc plate, which are prefabricated and assembled by welding;

[0013] The inner vertical plate faces the train track area in the tunnel, the outer arc panel is close to the inner side wall of the tunnel, and the buckle is arranged on the outer arc panel.

[0014] Furthermore, the inner vertical plate of the special-shaped channel shell is located outside the train running boundary.

[0015] Furthermore, the special-shaped channel shell includes a starting section, a standard section and an end section, and steps are provided at the head end of the starting section and the tail end of the end section, and the steps extend from the bottom plate to the cable trough cover plate.

[0016] Furthermore, the standard section includes multiple unit sections of the special-shaped channel shell, and the starting section, multiple unit sections of the standard section and the end section are spliced ​​along the line direction to form a longitudinally penetrating channel.

[0017] Furthermore, an interface is provided on the outer side of the special-shaped channel shell, corresponding to the protective door of the transverse channel.

[0018] On the other hand, a method for constructing a dangerous construction passage leading to a transverse passage from an existing train tunnel as described above is provided, the method comprising:

[0019] During tunnel construction, expansion bolts are pre-fixed on the side walls of the tunnel near the cross passage;

[0020] When the transverse channel needs to be constructed, the special-shaped channel shell is prefabricated in sections and the clips are installed;

[0021] Taking advantage of the construction time of the train skylight point, the special-shaped channel shell is transported to the train track area and mounted on the expansion bolts through buckles;

[0022] Install a support column at the bottom of the special-shaped channel shell;

[0023] Construction materials and construction personnel are transported to the cross channel construction area through the special-shaped channel shell.

[0024] Furthermore, the special-shaped channel shell is prefabricated in sections, including:

[0025] According to the designed length of the safe construction channel, determine the length of each part of the special-shaped channel shell;

[0026] The starting section, standard section and end section of the special-shaped channel shell are prefabricated, and steps are prefabricated on the special-shaped channel shells of the starting section and the end section;

[0027] The standard section is prefabricated with multiple sections of special-shaped channel shell unit segments.

[0028] Further, the support column is pre-fixed to the bottom plate of the special-shaped channel shell, or supported on the cable trough cover plate on site.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] The present invention provides a risk-avoiding construction passage leading to a transverse passage in an existing train tunnel and a construction support method thereof, which effectively isolates the transverse passage from a train track area to prevent piston wind generated by train travel from affecting the transverse passage, and constructs a construction passage leading to the transverse passage, so that construction materials can be transported into the existing tunnel during train operation, and construction personnel can pass safely, thereby ensuring construction safety in the existing train tunnel and improving construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, drawings of other embodiments can be obtained based on these drawings without paying creative work.

[0032] Figure 1 It is a schematic diagram of the layout of the hazardous construction channel.

[0033] Figure 2 It is a cross-sectional view of the emergency construction passage.

[0034] Figure 3 It is a longitudinal section view of the starting section of the safe construction passage.

[0035] Figure 4 It is a longitudinal section diagram of the standard section of the safe construction passage.

[0036] Figure 5 It is a longitudinal section view of the end section of the safe construction passage.

[0037] Figure 6 It is a cross-sectional view of the safe construction passage.

[0038] Figure 7 This is a schematic diagram of the expansion bolt position.

[0039] The symbols in the figure are:

[0040] 1-special-shaped channel shell, 2-expansion bolts, 3-cross channel construction area, 4-train track area, 5-steps, 6-inner side walls of the tunnel, 7-train running boundary range, 8-buckles, 9-support columns, 10-overhead floor, 11-bottom plate, 12-outer arc panel, 13-top plate, 14-inner vertical plate. DETAILED DESCRIPTION

[0041] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly understood.

[0042] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "vertical", "horizontal", "top", "bottom", "inside", "outside", "longitudinal", "lateral", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0043] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "set" and the like should be understood in a broad sense, for example, they can be fixedly connected or set, or detachably connected or set, or integrally connected or set. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] It should also be noted that although the order of steps is mentioned in the method description, in some cases, they may be performed in an order different from that shown here, and this should not be construed as a limitation on the order of the steps.

[0045] In a specific implementation manner, the line direction of the tunnel is defined as the longitudinal direction, the direction perpendicular thereto is defined as the transverse direction, the direction close to the tunnel centerline is defined as the inner side, and the opposite direction is defined as the outer side.

[0046] After the tunnel construction is completed, internal train traffic begins. After entering the operation period, if the cross passage needs further construction, the protective door of the cross passage needs to be opened. When transporting construction materials, it is likely that the protective door will need to be kept open for a long time. The piston wind from the train will inevitably pose a threat to the construction of the cross passage. In addition, the construction workers will also be exposed to the train track area during the construction process, which is extremely unsafe. In order to improve the safety of cross passage construction and safely transport construction materials and construction workers to the cross passage, the present invention provides a safe construction passage from an existing train tunnel to the cross passage, which effectively isolates the cross passage from the train track area to prevent the piston wind generated by the train from affecting the cross passage, and constructs a construction passage leading to the cross passage.

[0047] like Figure 1, the risk avoidance construction channel is installed in the tunnel section close to the side of the transverse channel construction area 3, and close to the inner side wall 6 of the tunnel. The risk avoidance construction channel includes a special-shaped channel shell 1, a buckle 8 and an expansion bolt 2. The special-shaped channel shell 1 is a strip channel structure that is annularly closed and open at both ends. The buckle 8 is arranged on the outer side of the special-shaped channel shell 1. The expansion bolt 2 is pre-arranged on the inner side wall 6 of the tunnel close to the transverse channel. When the transverse channel needs to be constructed, the special-shaped channel shell 1 is mounted on the expansion bolt 2 on the inner side wall 6 of the tunnel through the buckle 8.

[0048] Specifically, Figure 6 The special-shaped channel housing 1 is a special-shaped metal channel, including a top plate 13, a bottom plate 11, an inner vertical plate 14 and an outer curved panel 12, which can be made of steel plate material and prefabricated and assembled by welding. The inner vertical plate 14 faces the train track area 4 in the tunnel, the outer curved panel 12 is close to the inner side wall 6 of the tunnel, and the buckle 8 is set on the outer curved panel 12.

[0049] In addition, a vertical support column 9 is provided at the bottom of the special-shaped channel shell 1, and the support column 9 supports the special-shaped channel shell 1 on the cable trough cover plate on one side of the tunnel, and an overhead layer 10 is formed between the bottom of the special-shaped channel shell 1 and the cable trough cover plate.

[0050] like Figure 2 The inner vertical plate 14 of the special-shaped channel shell 1 is strictly located outside the train travel boundary range 7 to ensure the safety of train driving.

[0051] like Figure 3-5 The special-shaped channel housing 1 includes a starting section, a standard section and an end section. The head end of the starting section and the tail end of the end section are both provided with a step 5, which is also welded with a steel plate material and extends from the bottom plate 11 to the cable trough cover plate. The standard section includes multiple unit sections of the special-shaped channel housing 1, which can be assembled section by section to extend the length. The multiple unit sections of the starting section, the standard section and the end section are spliced ​​along the line direction to form a longitudinally through channel.

[0052] In some embodiments, the longitudinal length of the starting section, the standard section and the end section can all be 3 meters. Of course, according to the actual design length of the risk avoidance construction channel, the length of each section can also be flexibly adjusted. Among them, the longitudinal length of the standard section can also be prefabricated in different models of different lengths. On site, the appropriate length model can be selected according to the actual length for combination and splicing. During installation, according to the required length, the special-shaped channel shell 1 is repeatedly extended to the location of the transverse channel that needs to be constructed.

[0053] like Figure 1An interface can be opened on the outside of the special-shaped channel shell 1, which is opposite to the protective door of the transverse channel. Construction personnel can enter the safe construction channel through the step 5 at the starting section, and then enter the transverse channel through the interface and transport construction materials into it. They can also leave the safe construction channel from the step 5 at the end section, and are never exposed to the train track area 4, and the transverse channel is always isolated from the train track area 4.

[0054] like Figure 7 The expansion bolts 2 are pre-set on the side wall 6 of the tunnel near the cross passage, or they can be set on site according to strict skylight time and arranged in an array on the side wall 6 of the tunnel. In some embodiments, the expansion bolts 2 are spaced 0.8 m vertically and horizontally.

[0055] The construction method of the above-mentioned risk avoidance construction channel specifically comprises the following steps:

[0056] S1: During the tunnel construction, expansion bolts 2 are pre-fixed on the inner side wall 6 of the tunnel near the cross passage, and the expansion bolts 2 are arranged in an array on the inner side wall 6 of the tunnel.

[0057] S2: When the transverse channel needs to be constructed, the special-shaped channel shell 1 is prefabricated in sections and the buckles 8 are installed.

[0058] First, the lengths of the various parts of the special-shaped channel shell 1 need to be determined according to the designed length of the emergency construction channel. Then, the starting section, standard section and end section of the special-shaped channel shell 1 are prefabricated. Steps 5 are prefabricated on the special-shaped channel shell 1 of the starting section and the end section, and multiple sections of the special-shaped channel shell 1 unit sections are prefabricated in the standard section.

[0059] S3: Using the train skylight construction time, the special-shaped channel shell 1 is transported to the train track area 4 and mounted on the expansion bolt 2 through the buckle 8.

[0060] S4: Install the support column 9 at the bottom of the special-shaped channel shell 1.

[0061] The support column 9 can be pre-fixed to the bottom plate 11 of the special-shaped channel housing 1, and can also be supported on the cable trough cover plate on site.

[0062] S5: Transport construction materials and construction personnel to the transverse channel construction area 3 through the special-shaped channel shell 1.

[0063] The present invention constructs a risk-avoiding construction passage, which is used to isolate the cross passage and the train track area 4 during the construction of the cross passage. It also supports the protective doors and door frame walls of the cross passage of the existing train tunnel. It can be smoothly constructed without affecting the operation of the train, and solves the problems of difficult construction and long construction period when the train is operating in the tunnel. At the same time, it is of great significance to improve the safety of the train in the tunnel during construction.

[0064] The above specific examples are used to illustrate the present invention, which is only used to help understand the present invention and is not intended to limit the present invention. For those skilled in the art, according to the concept of the present invention, some simple deductions, modifications or substitutions can be made.

Claims

1. An existing train tunnel leading to a cross passage is provided with a danger avoidance construction passage, characterized in that: The risk avoidance construction channel comprises a special-shaped channel shell (1), a buckle (8) and an expansion bolt (2); The special-shaped channel housing (1) is a strip-shaped channel structure that is annularly closed and open at both ends, and the buckle (8) is arranged on the outer side surface of the special-shaped channel housing (1); The expansion bolts (2) are pre-arranged on the inner side wall (6) of the tunnel close to the transverse passage; When the transverse passage needs to be constructed, the special-shaped passage housing (1) is hung on the expansion bolt (2) on the inner side wall (6) of the tunnel through the buckle (8).

2. The danger avoidance construction passage leading to the transverse passage of an existing train tunnel according to claim 1 is characterized by: A vertical support column (9) is provided at the bottom of the special-shaped channel housing (1), and the support column (9) supports the special-shaped channel housing (1) on a cable trough cover plate on one side of the tunnel, and an overhead layer (10) is formed between the bottom of the special-shaped channel housing (1) and the cable trough cover plate.

3. The danger avoidance construction passage leading to the transverse passage of an existing train tunnel according to claim 2 is characterized by: The special-shaped channel shell (1) comprises a top plate (13), a bottom plate (11), an inner vertical plate (14) and an outer curved plate (12), which are prefabricated and assembled by welding; The inner vertical plate (14) faces the train track area (4) in the tunnel, the outer curved panel (12) is close to the inner side wall (6) of the tunnel, and the buckle (8) is arranged on the outer curved panel (12).

4. The danger avoidance construction passage leading to the transverse passage of an existing train tunnel according to claim 3 is characterized by: The inner vertical plate (14) of the special-shaped passage housing (1) is located outside the train travel boundary range (7).

5. The danger avoidance construction passage leading to the transverse passage of an existing train tunnel according to claim 4 is characterized by: The special-shaped channel housing (1) comprises a starting section, a standard section and an end section, the head end of the starting section and the tail end of the end section are both provided with steps (5), and the steps (5) extend from the bottom plate (11) to the cable trough cover plate.

6. The danger avoidance construction passage leading to the transverse passage of an existing train tunnel according to claim 5 is characterized by: The standard section comprises a plurality of unit sections of the special-shaped channel shell (1); the starting section, a plurality of unit sections of the standard section and the end section are spliced ​​along the line direction to form a longitudinally penetrating channel.

7. The danger avoidance construction passage leading to the transverse passage of an existing train tunnel according to claim 6 is characterized by: The outer side of the special-shaped channel housing (1) is provided with an interface corresponding to the protective door of the transverse channel.

8. The method for constructing a dangerous construction passage leading to a transverse passage in an existing train tunnel as claimed in claim 7, characterized in that: The method comprises: During tunnel construction, expansion bolts (2) are pre-fixed on the side walls (6) inside the tunnel near the cross passage; When the transverse channel needs to be constructed, the special-shaped channel shell (1) is prefabricated in sections and the buckles (8) are installed; Taking advantage of the construction time of the train skylight point, the special-shaped channel shell (1) is transported to the train track area (4) and mounted on the expansion bolt (2) through the buckle (8); A support column (9) is installed at the bottom of the special-shaped channel housing (1); Construction materials and construction personnel are transported to the transverse channel construction area (3) through the special-shaped channel shell (1).

9. The method for constructing a dangerous construction passage leading to a transverse passage in an existing train tunnel according to claim 8, characterized in that: The segmented prefabricated special-shaped channel casing (1) comprises: Determine the length of each part of the special-shaped passage casing (1) according to the designed length of the danger avoidance construction passage; Prefabricating the starting section, standard section and end section of the special-shaped channel shell (1), wherein steps (5) are prefabricated on the starting section and the end section of the special-shaped channel shell (1); The standard section is prefabricated with multiple sections of special-shaped channel shell (1) unit sections.

10. The method for constructing a dangerous construction passage leading to a transverse passage in an existing train tunnel according to claim 9, characterized in that: The support column (9) is pre-fixed to the bottom plate (11) of the special-shaped channel housing (1), or supported on the cable trough cover plate on site.

Images