A prefabricated sewage separation side ditch inspection well and cover

Abstract

The present invention belongs to the technical field of tunnels and underground engineering, and specifically relates to a prefabricated sewage separation side ditch inspection well and cover plate, which is characterized in that the inspection well portion is arranged below the tunnel lane, and is arranged close to the roadside inspection road outside the tunnel lane. The inspection well opening is arranged on one side of the upper part of the inspection well, and a transverse water guide pipe is arranged at the lower part of the inspection well to collect underground seepage. The inspection well cover plate is tightly closed with the inspection well opening, and a groove is formed on the upper surface of the inspection well cover plate, which also serves as a sewage drainage ditch. The inspection well opening and the inspection well cover plate are both arranged within the outer lateral width of the tunnel lane. The advantage of the present invention is that the lower size of the side ditch inspection well can meet the drainage requirements of different underground seepage amounts, the inspection well opening does not occupy the lane width, and does not affect the passage of tunnel vehicles during maintenance. The inspection well cover plate has an independent sewage discharge function, which meets the environmental protection requirements of tunnel drainage and sewage separation.

Description

Technical Field

[0001] The invention belongs to the technical field of tunnels and underground engineering, and in particular relates to a prefabricated sewage separation side ditch inspection well and a cover plate in a tunnel which does not occupy the width of a lane. Background Art

[0002] The tunnel drainage system is an important part of the tunnel project. According to the current tunnel design specifications, a longitudinal drainage system should be set up in the tunnel according to the principle of separating groundwater from operational cleaning sewage and firefighting sewage. Existing tunnels are equipped with roadside ditches to drain sewage, and central or side drainage culverts to drain underground water seepage. However, the following problems have existed for a long time: 1. The central culvert for draining groundwater is often located within the driving lane. During maintenance, the pavement layer structure needs to be broken and the lane needs to be closed, which greatly affects the passage of vehicles in the tunnel; 2. When the side culvert for draining underground water and the sewage culvert are independently set on the same side of the road, the culvert inspection wellhead and cover plate occupy a large space, and the driving width of the outermost lane also needs to be occupied during maintenance, affecting the passage of vehicles. Summary of the invention

[0003] The purpose of the present invention is to provide a prefabricated sewage separation side ditch inspection well and cover plate that does not occupy the lane width based on the above-mentioned prior art problems, while meeting the environmental protection requirements of sewage separation, avoiding the problem that the drainage ditch inspection well occupies the lane width and affects the passage of tunnel vehicles during maintenance.

[0004] The present invention is implemented by the following technical solutions:

[0005] A prefabricated sewage separation side ditch inspection well and cover plate, a tunnel roadside inspection road is arranged outside the tunnel lane, and its characteristic is that the inspection well portion is arranged below the tunnel lane, close to the tunnel roadside inspection road, the inspection well opening is arranged on one side of the upper part of the inspection well, and a horizontal water pipe is arranged at the lower part of the inspection well to collect underground seepage water, the inspection well cover plate is tightly closed with the inspection well opening, a groove is formed on the upper surface of the inspection well cover plate, which is smoothly connected with the through-length sewage side ditch on the tunnel roadside and also serves as a sewage side ditch, and the inspection well opening and the inspection well cover plate are arranged within the outer lateral width of the tunnel lane.

[0006] Furthermore, a U-shaped wellhead wall edge is provided above the inspection well, and the opening of the U-shaped wellhead wall edge faces the tunnel road side inspection road, and an inspection wellhead is formed between the U-shaped wellhead wall edge and the side wall of the tunnel road side inspection road. A U-shaped groove is provided on the upper surface of one side of the inspection well cover plate, and the outer side surface of the side wall on one side of the U-shaped groove is tightly attached to the side of the tunnel road side inspection road, and the bottom of the side wall on this side of the U-shaped groove is tightly attached to the top of the outer side wall of the inspection well. The other side of the inspection well cover plate is a horizontal cover plate, which cooperates with the U-shaped wellhead wall edge above the inspection well, and is embedded in the U-shaped wellhead wall edge opening above the inspection well.

[0007] Furthermore, the inspection well cover and the inspection well are both prefabricated parts and can be installed in place at one time during construction, which can improve construction efficiency.

[0008] Furthermore, a water pipe hole is reserved at the lower part of the side wall of the prefabricated inspection well facing the tunnel roadside inspection road, and the water pipe hole is connected to the longitudinal drainage pipe in the tunnel side wall through a transverse water pipe.

[0009] A construction method for a prefabricated sewage separation side ditch inspection well and a cover plate, characterized in that the method comprises the following steps:

[0010] After the tunnel lining and invert are backfilled to the bottom elevation of the inspection well culvert, the prefabricated inspection well is installed in place at one time. The lower water-passing section of the prefabricated inspection well is connected with the groundwater drainage culvert set up along the entire tunnel roadside to form an integral clean water culvert. The reserved water pipe hole is connected with the longitudinal drainage pipe through the transverse water pipe to drain the groundwater collected by the longitudinal drainage pipe; the gap between the transverse water pipe and the water pipe hole is filled and sealed with waterproof mortar; after the inspection well is in place, the inspection well cover is installed, a U-shaped wellhead wall edge is set above the inspection well, and a groove is set on the inner side of the U-shaped wellhead wall edge. The inspection well cover is tightly closed with the inner groove of the U-shaped wellhead wall edge, and the U-shaped groove on the inspection well cover is also connected to the tunnel roadside sewage side ditch to drain the sewage in the tunnel.

[0011] The inspection well opening and cover are arranged within the outer width of the lane, do not occupy the lane width, and do not need to close the lane during maintenance. The inspection well cover does not occupy the lane width and can completely cover the inspection well opening. The size of the sewage trough is the same as the sewage ditch of the entire line, ensuring the penetration of the sewage ditch of the entire tunnel, while isolating the roadside sewage from the underground seepage in the side ditch, achieving the effect of separation of clean and dirty water.

[0012] The advantages of the present invention are: the lower part of the side ditch inspection well collects underground seepage water through the horizontal water guide pipe, and the water-passing section is designed according to the water gushing amount of the tunnel stratum, which can meet the drainage function requirements of different underground seepage amounts. The inspection well mouth and the inspection well cover do not occupy the lane width, and there is no need to close the lane during maintenance, which does not affect the passage of vehicles in the tunnel. The inspection well cover also has the function of sewage side ditch, which ensures the penetration of the sewage side ditch of the entire tunnel, and at the same time isolates the roadside sewage from the groundwater in the side ditch, so as to achieve the effect of clean and dirty separation and meet the environmental protection requirements of tunnel drainage and clean and dirty separation. The inspection well and the cover are prefabricated components and can be installed in place at one time, with high construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a cross-sectional view of a prefabricated side ditch inspection well and a special-shaped inspection well cover that also serves as a sewage side ditch.

[0014] Figure 2 A top view of a prefabricated special-shaped inspection well cover that also serves as a sewage side ditch.

[0015] Figure 3 This is a top view of the prefabricated side ditch inspection well.

[0016] Figure 4 This is a cross-sectional view of a prefabricated side ditch inspection well.

[0017] Marking instructions: 1-manhole cover; 2-prefabricated manhole; 3-manhole mouth; 4-tunnel driveway; 5-tunnel roadside inspection road; 6-horizontal water pipe; 7-tunnel longitudinal drainage pipe; 8-reserved water pipe hole in the manhole. DETAILED DESCRIPTION

[0018] The features of the present invention and other related features are further described in detail below in conjunction with the accompanying drawings to facilitate understanding by technicians in the same industry.

[0019] See also Figure 1-4 As shown, a prefabricated sewage separation side ditch inspection well and cover plate in a tunnel that does not occupy the width of a lane includes a prefabricated inspection well 2 and a prefabricated special-shaped inspection well cover plate 1 that also serves as a sewage side ditch.

[0020] A tunnel roadside inspection road 5 is provided outside the tunnel lane 4. The prefabricated inspection well 2 is arranged below the tunnel lane 4 and is set close to the tunnel roadside inspection road 5. The inspection well mouth 3 is set between the tunnel lane and the tunnel roadside inspection road. A transverse water pipe 6 is provided at the bottom of the prefabricated inspection well 2 to collect underground seepage water. The inspection well cover is tightly closed with the inspection well mouth. A groove is formed on the upper surface of the inspection well cover, which also serves as a drainage ditch. The water-passing section size of the lower part of the prefabricated inspection well 2 is the same as the drainage ditch set along the tunnel roadside.

[0021] A U-shaped wellhead wall edge is arranged above the prefabricated inspection well 2, and the opening of the U-shaped wellhead wall edge faces the tunnel roadside inspection road. An inspection wellhead 3 is formed between the U-shaped wellhead wall edge and the side wall of the tunnel roadside inspection road. A U-shaped groove is arranged on the upper surface of one side of the inspection well cover plate 1. The outer side surface of the side wall of one side of the U-shaped groove is in close contact with the side of the tunnel roadside inspection road 5. The bottom of the side wall of the U-shaped groove is in close contact with the top of the outer side wall of the inspection well. The other side of the inspection well cover plate 1 is a transverse cover plate, which cooperates with the U-shaped wellhead wall edge above the inspection well and is embedded in the opening of the U-shaped wellhead wall edge above the inspection well. A water pipe hole 8 is reserved at the lower part of the side wall of the prefabricated inspection well 2 facing the tunnel roadside inspection road. The transverse water pipe 6 is connected to the water pipe hole 8, and the water pipe hole 8 is connected to the longitudinal drainage pipe 7 in the tunnel side wall through the transverse water pipe 6.

[0022] The size of the drainage section at the bottom of the inspection well is determined according to the amount of water inflow from the tunnel strata, and is the same as the drainage ditch along the entire length of the tunnel. The lateral width of the wellhead 3 is not greater than the lateral width of the tunnel's designed lane. The drainage section of the inspection well cover 1 is calculated based on the amount of sewage discharged from the tunnel and is the same as the size of the drainage ditch along the entire tunnel. It is preferably U-shaped for easy flushing. The lateral width of the inspection well cover 1 is designed to match the size of the wellhead 3 and is not greater than the lateral width of the tunnel's designed lane.

[0023] After the tunnel lining and invert are backfilled to the bottom elevation of the inspection well culvert, the prefabricated inspection well 2 is installed in place at one time. The water-passing cross-sectional size of the lower part of the prefabricated inspection well 2 is the same as the groundwater drainage culvert set up along the entire tunnel roadside and is connected to form an integral clean water culvert. The reserved water pipe hole 8 is connected to the longitudinal drainage pipe 7 through the transverse water pipe 6, which is used to drain the groundwater collected by the longitudinal drainage pipe 7. The gap between the water pipe 6 and the water pipe hole 8 is filled and sealed with waterproof mortar; after the inspection well 2 is in place, the inspection well cover 1 is installed at one time, and a groove is set on the inner side of the U-shaped wellhead wall above the prefabricated inspection well 2, which is tightly closed with the inspection well cover 1. The inspection well cover 1 is also connected to the tunnel roadside sewage side ditch to drain sewage in the tunnel.

[0024] In the above technical scheme, the prefabricated clean and sewage separation side ditch inspection wells and covers can ensure the separation and discharge requirements of clean water and sewage in the entire tunnel. In particular, the large amount of sewage in long and large tunnels can be discharged separately, centralized and purified, and reused, with obvious environmental benefits. The inspection well cover 1 is connected to the sewage side ditch of the entire line, and the sewage ditch is U-shaped for easy flushing. The lower part of the inspection well collects underground seepage through a horizontal water pipe, and the water-passing section is reasonably designed according to the water inflow of the formation to meet the drainage requirements. At the same time, the lateral width of the inspection well mouth and the cover is not greater than the lateral width outside the lane. When inspecting the drainage ditch, there is no need to break the road surface, and it does not occupy the lane width, which is convenient for inspection. All components are prefabricated, and the construction efficiency is high.

Claims

1. A prefabricated sewage separation side ditch inspection well and cover plate, characterized in that The inspection well is partially arranged below the tunnel lane and is set up close to the roadside inspection road outside the tunnel lane. The inspection well opening is set on one side of the upper part of the inspection well. A transverse water pipe is set at the lower part of the inspection well to collect underground seepage water. The inspection well cover is tightly closed with the inspection well opening. A groove is formed on the upper surface of the inspection well cover, which is smoothly connected to the through-length sewage side ditch on the side of the tunnel road and also serves as a sewage side ditch. The inspection well opening and the inspection well cover are both arranged within the outer lateral width of the tunnel lane. A U-shaped well opening wall edge is set above the inspection well. The U-shaped well opening wall The opening along the edge faces the tunnel road side inspection road, and an inspection well mouth is formed between the U-shaped well mouth wall edge and the side wall of the tunnel road side inspection road. A U-shaped groove is arranged on the upper surface of one side of the inspection well cover plate, and the outer side surface of the side wall on one side of the U-shaped groove is tightly attached to the side surface of the tunnel road side inspection road, and the bottom of the side wall on this side of the U-shaped groove is tightly attached to the top of the outer side wall of the inspection well. The other side of the inspection well cover plate is a horizontal cover plate, which cooperates with the U-shaped well mouth wall edge above the inspection well, and is embedded in the U-shaped well mouth wall edge opening above the inspection well.

2. The prefabricated sewage separation side ditch inspection well and cover plate according to claim 1 is characterized in that The inspection well cover plate and the inspection well are both prefabricated parts.

3. The prefabricated sewage separation side ditch inspection well and cover plate according to claim 1 is characterized in that A water pipe hole is reserved at the lower part of the side wall of the prefabricated inspection well facing the tunnel roadside inspection road, and the water pipe hole is connected to the longitudinal drainage pipe in the tunnel side wall through a transverse water pipe.

4. A construction method for a prefabricated sewage separation side ditch inspection well and cover plate, characterized in that The method comprises the following steps: after the tunnel lining and the invert are backfilled to the bottom elevation of the inspection well culvert, the prefabricated inspection well is installed in place at one time, the water-passing section at the bottom of the prefabricated inspection well is connected with the underground water drainage culvert arranged along the entire tunnel roadside to form an integral clean water culvert, the reserved water guide pipe hole is connected with the longitudinal drainage pipe through the transverse water guide pipe, and is used to drain the underground water collected by the longitudinal drainage pipe; the gap between the transverse water guide pipe and the water guide pipe hole is filled and sealed with waterproof mortar; after the inspection well is in place, the inspection well cover is installed, a U-shaped wellhead wall edge is arranged above the inspection well, a notch is arranged on the inner side of the U-shaped wellhead wall edge, the inspection well cover is tightly closed with the inner notch of the U-shaped wellhead wall edge, and the U-shaped groove on the inspection well cover is simultaneously connected with the tunnel roadside sewage side ditch, and is used to drain the sewage in the tunnel.

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