Comprehensive drainage method and drainage system for invert construction of water-rich section of double-hole single-line tunnel

Abstract

The present application discloses a comprehensive drainage method for the invert construction of a water-rich section of a double-hole single-line tunnel. The method comprises the following steps: the present application intercepts water in the first water collection pit by setting a water retaining dam; the first water pump and the first drainage pipe pump out the accumulated water in the first water collection pit to the unconstructed tunnel of the invert, so as to realize the left and right water backflow of the double-hole single-line; then, if it is reverse slope drainage, the second water collection pit of the invert construction section collects water, and the second water pump and the second drainage pipe pump out the accumulated water in the second water collection pit to the side wall sewage pipe of the invert construction tunnel; if it is slope drainage, the accumulated water in the invert construction section is drained downstream to the invert ditch of the invert construction tunnel; the current pumping and drainage water value is detected in real time, and if the pumping and drainage water value meets the standard, concrete pouring is started. This method minimizes the pumping and drainage time by pouring water in the left and right lines of the double-hole single line, combining drainage with water pipes and side wall sewage pipes when reverse slope, and direct drainage from the invert ditch when slope is smooth, and effectively reduces the influence of accumulated water on the pouring of the second lining invert concrete.

Description

Technical Field

[0001] The present invention generally relates to the technical field of tunnel construction, and in particular to a comprehensive drainage method and drainage system for the construction of an invert arch in a water-rich section of a double-hole single-line tunnel. Background Art

[0002] Generally speaking, the hydrological environment of long and large tunnels is complicated, which makes construction difficult. In particular, it brings great difficulties to the construction of the lining arch concrete in the water-rich section. The drainage effect before the arch pouring directly affects the quality of the secondary lining concrete pouring. The slope of the main tunnel exit of the 3# inclined shaft of Zhongtiaoshan Tunnel is 5.1‰ upward. The gushing water flows from the heading to the construction section of the secondary lining arch. The groundwater is developed and presents a rain-like to gushing state. Simple drainage cannot meet the on-site construction requirements. Summary of the invention

[0003] In view of the above-mentioned defects or deficiencies in the prior art, it is desired to provide a comprehensive drainage method for the construction of the water-rich section of a double-hole single-track tunnel that meets on-site construction requirements, improves the quality of the secondary lining invert concrete pouring, and reduces the pumping and drainage time.

[0004] In a first aspect, the present application provides a method for comprehensive drainage of an invert arch in a water-rich section of a double-hole single-line tunnel, comprising the following steps:

[0005] S1: Measure the pumping and drainage volume of the water-rich section of a double-hole single-line tunnel;

[0006] S2: When the pumping and drainage water volume value of the water-rich section of the double-hole single-track tunnel is greater than or equal to the pumping and drainage water volume threshold, execute S3; when the pumping and drainage water volume value of the water-rich section of the double-hole single-track tunnel is less than the pumping and drainage water volume threshold, execute S5;

[0007] S3: The water is intercepted in the first water collection pit by a water retaining dam;

[0008] S4: Pumping the accumulated water in the first sump to the inverted unconstructed tunnel by a first water pump and a first drainage pipe;

[0009] S5: If it is reverse slope drainage, execute S6; if it is down slope drainage, execute S8;

[0010] S6: water is collected by the second water collection pit in the invert construction section;

[0011] S7: Pumping the accumulated water in the second sump to the preset position of the invert construction tunnel by the second water pump and the second drainage pipe, and then executing S9;

[0012] S8: The accumulated water in the invert construction section is drained downstream to the preset position of the invert construction tunnel;

[0013] S9: Real-time detection of the current pumping and drainage water volume value;

[0014] If the current pumping and drainage water volume value is greater than the preset pumping and drainage standard value, execute S2;

[0015] If the current pumping and drainage water volume value is less than or equal to the preset pumping and drainage standard value, the pumping and drainage water volume value meets the standard and concrete pouring begins;

[0016] The preset pumping and drainage standard value is less than the pumping and drainage water volume threshold.

[0017] According to the technical solution provided in the embodiment of the present application, the preset position of the inverted arch construction tunnel includes: if it is reverse slope drainage, the preset position of the inverted arch construction tunnel is the side wall sewage pipe; if it is down slope drainage, the preset position of the inverted arch construction tunnel is the inverted arch ditch.

[0018] According to the technical solution provided in the embodiment of the present application, before drainage construction, the safety of water, electricity, guardrails and warning signs in the construction section is checked; if the test is qualified, S1 to S9 are executed; if the test is unqualified, the water, electricity, guardrails and warning signs in the construction section are reset.

[0019] In a second aspect, the present application provides a drainage system based on the above-mentioned method for comprehensive drainage of invert construction in a water-rich section of a double-hole single-track tunnel, characterized in that the water-rich section of the double-hole single-track tunnel includes: an invert construction tunnel and an invert unconstructed tunnel, and the two are connected by a transverse passage; the invert construction tunnel has a cast invert section and an invert construction section arranged in sequence, and the invert construction section is arranged close to the transverse passage; the invert construction section is provided with a trestle; the drainage system includes:

[0020] A water retaining dam and a first water collecting pit are sequentially arranged at the cross passageway, and the first water collecting pit is arranged away from the trestle relative to the water retaining dam;

[0021] A first drainage pipe is laid in the first sump and the unconstructed tunnel of the invert, and the first drainage pipe is connected with the first sump and the unconstructed tunnel of the invert;

[0022] a first water pump, connected to the first drainage pipe, and used to pump the accumulated water in the first sump to the inverted unconstructed tunnel through the first drainage pipe;

[0023] A second water collection pit is arranged between the trestle and the water retaining dam;

[0024] An inverted arch ditch is provided at the edge of the cast inverted arch section and is connected with the inverted arch construction section;

[0025] A side wall sewage pipe, which is arranged at the edge of the cast invert arch section;

[0026] A second drainage pipe is arranged at the bottom of the trestle and is connected with the second sump and the side wall sewage pipe;

[0027] A second water pump is connected to the second drainage pipe, and is used for pumping the accumulated water in the second sump to the side wall sewage pipe through the second drainage pipe.

[0028] According to the technical solution provided in the embodiment of the present application, it also includes: an approach bridge, which is arranged between the pier and the second sump and is overlapped with the pier.

[0029] According to the technical solution provided in the embodiment of the present application, the first drain pipe is a rubber hose with a diameter of 200 mm.

[0030] According to the technical solution provided in the embodiment of the present application, the second drainage pipe is a steel pipe with a diameter of 300 mm.

[0031] In summary, the technical solution specifically discloses a specific process of a comprehensive drainage method for the construction of an invert arch in a water-rich section of a double-hole single-line tunnel. The application intercepts water in a first sump by setting a water retaining dam; the accumulated water in the first sump is pumped out by a first water pump and a first drainage pipe to the unconstructed tunnel of the invert arch, so as to realize the water backflow of the left and right lines of the double-hole single-line; then, if it is reverse slope drainage, the second sump of the invert arch construction section is used to collect water; the second water pump and the second drainage pipe are used to pump out the accumulated water in the second sump to the side wall sewage pipe of the invert arch construction tunnel, so as to realize the combined drainage of the water pipe and the side wall sewage pipe; if it is down-slope drainage, the accumulated water in the invert arch construction section is drained downstream to the invert arch ditch of the invert arch construction tunnel, so as to realize direct drainage of the invert arch ditch; the current pumping and drainage water volume value is detected in real time, and if the pumping and drainage water volume value meets the standard, concrete pouring is started.

[0032] This method uses double-hole single-line left and right lines to pour water, combines water pipes and side wall sewage pipes for drainage when the slope is reversed, and directly discharges from the arch ditch when the slope is forward. It minimizes the time for pumping and drainage, effectively reduces the impact of accumulated water on the pouring of secondary lining arch concrete, reduces the impact of accumulated water on the construction progress, and ensures the quality of the pouring of secondary lining arch concrete. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0034] Figure 1 The figure is a schematic diagram of the process of a comprehensive drainage method for the invert construction of a water-rich section of a double-hole single-line tunnel.

[0035] Figure 2 The diagram is a structural diagram of the drainage system for a comprehensive drainage method for the invert construction of a water-rich section of a double-hole single-line tunnel.

[0036] Numbers in the figure: 1. Inverted arch tunnel; 2. Inverted arch tunnel without construction; 3. Cross passage; 4. Cast inverted arch section; 5. Inverted arch construction section; 6. Approach bridge; 7. Dam; 8. First collection pit; 9. First drainage pipe; 10. First water pump; 11. Second collection pit; 12. Inverted arch ditch; 13. Side wall sewage pipe; 14. Second drainage pipe; 15. Second water pump. DETAILED DESCRIPTION

[0037] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It is also necessary to explain that, for ease of description, only the parts related to the invention are shown in the accompanying drawings.

[0038] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0039] Please refer to Figure 1 The schematic flow chart of the first embodiment of a method for comprehensive drainage of an invert construction in a water-rich section of a double-hole single-line tunnel provided by the present application includes:

[0040] S1: Measure the pumping and drainage volume of the water-rich section of a double-hole single-line tunnel;

[0041] S2: When the pumping and drainage water volume value of the water-rich section of the double-hole single-track tunnel is greater than or equal to the pumping and drainage water volume threshold, execute S3; when the pumping and drainage water volume value of the water-rich section of the double-hole single-track tunnel is less than the pumping and drainage water volume threshold, execute S5;

[0042] S3: The water is intercepted in the first water collection pit by a water retaining dam;

[0043] S4: Pumping the accumulated water in the first sump to the inverted unconstructed tunnel by a first water pump and a first drainage pipe;

[0044] S5: If it is reverse slope drainage, execute S6; if it is down slope drainage, execute S8;

[0045] S6: water is collected by the second water collection pit in the invert construction section;

[0046] S7: Pumping the accumulated water in the second sump to the preset position of the invert construction tunnel by the second water pump and the second drainage pipe, and then executing S9;

[0047] S8: The accumulated water in the invert construction section is drained downstream to the preset position of the invert construction tunnel;

[0048] S9: Real-time detection of the current pumping and drainage water volume value;

[0049] If the current pumping and drainage water volume value is greater than the preset pumping and drainage standard value, execute S2;

[0050] If the current pumping and drainage water volume value is less than or equal to the preset pumping and drainage standard value, the pumping and drainage water volume value meets the standard and concrete pouring begins;

[0051] The preset pumping and drainage standard value is less than the pumping and drainage water volume threshold.

[0052] Embodiment 1

[0053] Measure the amount of water pumped out of the water-rich section of a double-hole single-line tunnel;

[0054] Set the pumping and drainage threshold to 100m 3 / h;

[0055] When the pumping and drainage water volume value of the water-rich section of the double-hole single-line tunnel is greater than or equal to the pumping and drainage water volume threshold, the water is intercepted in the first water collection pit by setting up a water retaining dam;

[0056] The first water pump and the first drainage pipe are used to pump the accumulated water in the first sump to the unconstructed tunnel of the invert, so as to realize the double-hole single-line left and right line water pouring, and most of the water is introduced into the unconstructed tunnel of the invert, so as to reduce the pumping pressure in front of the trestle and the invert construction section;

[0057] If it is reverse slope drainage, the water will be collected by the second water collection pit in the invert construction section;

[0058] The second water pump and the second drainage pipe pump the accumulated water in the second sump to the side wall sewage pipe of the invert construction tunnel, so as to realize the combined drainage of the water pipe and the side wall sewage pipe;

[0059] Real-time detection of the current drainage water value, until the current drainage water value is less than or equal to the preset drainage standard value, the drainage water value meets the standard, and concrete pouring begins;

[0060] The standard value of pumping and drainage is the maximum constructible water volume;

[0061] Before drainage construction, check the safety of water, electricity, guardrails and warning signs in the construction section; if the inspection is qualified, construction can begin;

[0062] If the inspection fails, the water, electricity, guardrails and warning signs of the construction section will be reset.

[0063] Embodiment 2

[0064] Based on the first embodiment, when the pumping and drainage water volume value of the water-rich section of the double-hole single-line tunnel is greater than or equal to the pumping and drainage water volume threshold, if it is downslope drainage, the accumulated water in the invert construction section is drained downstream to the invert ditch of the invert construction tunnel to achieve direct drainage of the invert ditch;

[0065] The current pumping and drainage water volume value is detected in real time until the current pumping and drainage water volume value is less than or equal to the preset pumping and drainage standard value. The pumping and drainage water volume value meets the standard and concrete pouring begins.

[0066] Embodiment 3

[0067] This embodiment is based on the first embodiment. When the pumping and drainage water volume value of the water-rich section of the double-hole single-line tunnel is less than the pumping and drainage water volume threshold, if it is reverse slope drainage, the water is collected by the second sump of the invert construction section;

[0068] The second water pump and the second drainage pipe are used to pump the accumulated water in the second sump to the sewage pipe on the side wall of the invert construction tunnel;

[0069] The current pumping and drainage water volume value is detected in real time until the current pumping and drainage water volume value is less than or equal to the preset pumping and drainage standard value. The pumping and drainage water volume value meets the standard and concrete pouring begins.

[0070] Embodiment 4

[0071] This embodiment is based on the first embodiment. When the pumping and drainage water volume value of the water-rich section of the double-hole single-line tunnel is less than the pumping and drainage water volume threshold, if it is downslope drainage, the accumulated water in the invert construction section is drained downstream to the invert ditch of the invert construction tunnel;

[0072] The current pumping and drainage water volume value is detected in real time until the current pumping and drainage water volume value is less than or equal to the preset pumping and drainage standard value. The pumping and drainage water volume value meets the standard and concrete pouring begins.

[0073] Embodiment 5

[0074] Please refer to Figure 2 The schematic diagram of the structure of the first embodiment of the drainage system of the integrated drainage method for invert construction of a water-rich section of a double-hole single-track tunnel provided by the present application is shown, wherein the water-rich section of the double-hole single-track tunnel comprises: an invert construction tunnel 1 and an invert unconstructed tunnel 2, which are connected by a transverse passage 3; the invert construction tunnel 1 has a cast invert section 4 and an invert construction section 5 arranged in sequence, and the invert construction section 5 is arranged close to the transverse passage 3; the invert construction section 5 is provided with a trestle; the drainage system comprises:

[0075] The water retaining dam 7 and the first water collecting pit 8 are arranged at the crossing of the cross passage 3 in sequence, and the first water collecting pit 8 is arranged far away from the trestle relative to the water retaining dam 7;

[0076] A first drainage pipe 9 is laid in the first sump 8 and the inverted tunnel 2 without construction, and the first drainage pipe 9 is connected with the first sump 8 and the inverted tunnel 2 without construction;

[0077] A first water pump 10 is connected to the first drainage pipe 9 and is used to pump the accumulated water in the first sump 8 to the inverted unconstructed tunnel 2 through the first drainage pipe 9;

[0078] The second water collection pit 11 is arranged between the trestle and the water retaining dam 7;

[0079] The inverted arch ditch 12 is opened at the edge of the cast inverted arch section 4 and is connected with the inverted arch construction section 5;

[0080] The side wall sewage pipe 13 is arranged at the edge of the cast invert arch section 4;

[0081] A second drainage pipe 14 is arranged at the bottom of the trestle and is connected to the second sump 11 and the side wall sewage pipe 13;

[0082] The second water pump 15 is communicated with the second drainage pipe 14 and is used for pumping the accumulated water in the second sump 11 to the side wall sewage pipe 13 through the second drainage pipe 14 .

[0083] In this embodiment, the water retaining dam 7 and the first water collection pit 8 are sequentially arranged at the crossing of the transverse passage 3, and the first water collection pit 8 is arranged away from the trestle relative to the water retaining dam 7;

[0084] A water retaining dam 7 is used to block water from flowing into the invert construction tunnel;

[0085] A first sump 8 for storing the influx of water;

[0086] A first drainage pipe 9 is laid in the first sump 8 and the inverted tunnel 2 without construction. The first drainage pipe 9 is connected with the first sump 8 and the inverted tunnel 2 without construction, and is used to transport the accumulated water in the first sump 8;

[0087] A first water pump 10 is connected to the first drainage pipe 9 and is used to pump the accumulated water in the first sump 8 to the inverted unconstructed tunnel 2 through the first drainage pipe 9;

[0088] The second water collection pit 11 is arranged between the trestle and the water retaining dam 7, and is used to store the accumulated water in the invert construction section 5 during reverse slope drainage;

[0089] The inverted arch ditch 12 is provided at the edge of the cast inverted arch section 4 and is connected to the inverted arch construction section 5, and is used to discharge the accumulated water in the inverted arch construction section 5 when draining water along the slope;

[0090] The side wall sewage pipe 13 is arranged at the edge of the cast inverted arch section 4 and is used to discharge the accumulated water in the inverted arch construction section 5 during reverse slope drainage;

[0091] A second drainage pipe 14 is disposed at the bottom of the trestle and is connected to the second sump 11 and the side wall sewage pipe 13, and is used to transport the accumulated water in the second sump 11;

[0092] The second water pump 15 is connected to the second drainage pipe 14 and is used to pump the accumulated water in the second sump 11 to the side wall sewage pipe 13 through the second drainage pipe 14 during reverse slope drainage.

[0093] like Figure 2 As shown, the approach bridge 6 is arranged between the trestle and the second sump 11, and is overlapped with the trestle. There is a height difference between the trestle and the ground. In order to make it easy for workers and vehicles to get on the trestle, the approach bridge is used to convert this height difference into a slope.

[0094] like Figure 2 As shown, the first drain pipe 9 is of a type such as a rubber hose, and has a diameter of 200 mm.

[0095] like Figure 2 As shown, the type of the second drain pipe 14 is, for example, a steel pipe, and its diameter is 300 mm.

[0096] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the present application.

Claims

1. A comprehensive drainage method for the invert construction of a water-rich section of a double-hole single-line tunnel, characterized in that: The following steps are involved: S1: Measure the pumping and drainage volume of the water-rich section of a double-hole single-line tunnel; S2: When the pumping and drainage water volume value of the water-rich section of the double-hole single-track tunnel is greater than or equal to the pumping and drainage water volume threshold, execute S3; when the pumping and drainage water volume value of the water-rich section of the double-hole single-track tunnel is less than the pumping and drainage water volume threshold, execute S5; S3: The water is intercepted in the first water collection pit by a water retaining dam; S4: Pumping the accumulated water in the first sump to the inverted unconstructed tunnel by a first water pump and a first drainage pipe; S5: If it is reverse slope drainage, execute S6; if it is down slope drainage, execute S8; S6: water is collected by the second water collection pit in the invert construction section; S7: Pumping the accumulated water in the second sump to the preset position of the invert construction tunnel by the second water pump and the second drainage pipe, and then executing S9; S8: The accumulated water in the invert construction section is drained downstream to the preset position of the invert construction tunnel; S9: Real-time detection of current pumping and drainage water volume; If the current pumping and drainage water volume value is greater than the preset pumping and drainage standard value, execute S2; If the current pumping and drainage water volume value is less than or equal to the preset pumping and drainage standard value, the pumping and drainage water volume value meets the standard and concrete pouring begins; The preset pumping and drainage standard value is less than the pumping and drainage water volume threshold.

2. A method for comprehensive drainage of inverts in water-rich sections of double-hole single-track tunnels according to claim 1, characterized in that: The preset positions of the invert construction tunnel include: If reverse slope drainage is used, the preset position of the invert construction tunnel is the side wall sewage pipe; If drainage is to be carried out along the slope, the preset position of the invert construction tunnel is the invert ditch.

3. A method for comprehensive drainage of inverts in water-rich sections of double-hole single-track tunnels according to claim 1, characterized in that: The following steps are also included: Before drainage construction, check the safety of water, electricity, guardrails and warning signs in the construction section; if the inspection is qualified, execute S1 to S9; If the inspection fails, the water, electricity, guardrails and warning signs of the construction section will be reset.

4. A drainage system based on the comprehensive drainage method for invert construction of a water-rich section of a double-hole single-track tunnel according to any one of claims 1 to 3, characterized in that: The water-rich section of the double-hole single-track tunnel comprises: an invert construction tunnel (1) and an invert non-construction tunnel (2), and the two are connected via a transverse passage (3); the invert construction tunnel (1) comprises a cast invert section (4) and an invert construction section (5) arranged in sequence, and the invert construction section (5) is arranged close to the transverse passage (3); the invert construction section (5) is provided with a trestle; the drainage system comprises: The water retaining dam (7) and the first water collecting pit (8) are arranged in sequence at the crossing of the transverse passage (3), and the first water collecting pit (8) is arranged away from the trestle relative to the water retaining dam (7); A first drainage pipe (9) is laid in the first sump (8) and the inverted arch unconstructed tunnel (2), the first drainage pipe (9) being in communication with the first sump (8) and the inverted arch unconstructed tunnel (2); A first water pump (10) is connected to the first drainage pipe (9) and is used to pump the accumulated water in the first sump (8) to the inverted unconstructed tunnel (2) through the first drainage pipe (9); A second water collection pit (11) is arranged between the trestle and the water retaining dam (7); An inverted arch ditch (12) is provided at the edge of the cast inverted arch section (4) and is connected to the inverted arch construction section (5); A side wall sewage pipe (13) arranged at the edge of the cast invert arch section (4); A second drainage pipe (14), arranged at the bottom of the trestle and connected to the second sump (11) and the side wall sewage pipe (13); A second water pump (15) is connected to the second drainage pipe (14) and is used to pump the accumulated water in the second sump (11) to the side wall sewage pipe (13) through the second drainage pipe (14).

5. A drainage system according to claim 4, characterized in that: Also includes: An approach bridge (6), the approach bridge (6) being arranged between the trestle and the second sump (11), and being overlapped with the trestle.

6. A drainage system according to claim 4, characterized in that: The first drainage pipe (9) is a rubber hose with a diameter of 200 mm.

7. A drainage system according to claim 4, characterized in that: The second drainage pipe (14) is a steel pipe with a diameter of 300 mm.

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