A method for laying a drain pipe under a road surface

Abstract

A kind of road surface below drainpipe laying construction method, comprising the following construction steps: S1, starting pit and receiving pit are respectively excavated in the both sides of road surface, the connecting line between starting pit and receiving pit is the laying path of drainpipe;S2, horizontal spiral drill is used to carry out horizontal drilling from starting pit side wall or receiving pit side wall, or simultaneously from starting pit side wall and receiving pit side wall, and finally form the laying channel of intercommunication between starting pit and receiving pit;S3, buried groove is set along the length direction of laying channel in the side wall of laying channel, and installation rail is laid in buried groove;S4, sliding member is fixed on the periphery of drainpipe, sliding member is slidingly installed in installation rail, sliding member is driven to move along installation rail, until drainpipe is pulled from starting pit along laying channel to the side of receiving pit, and the laying of drainpipe is completed.The construction method of the present application can complete the laying of drainpipe below road surface without affecting road traffic.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of underground pipeline laying, and particularly relates to a method for laying a drainage pipe under a road surface. BACKGROUND

[0002] In engineering practice, the operation of laying a drainage pipe under an existing concrete road surface is often encountered. Since the pipe diameter of the drainage pipe is large, the method of first breaking the concrete road surface, then excavating a groove, and finally laying is usually adopted.

[0003] This method causes damage to the concrete road surface structure, and the durability of the reconstructed concrete road surface structure is poor and the aesthetic degree is reduced. In addition, a large noise is generated during the process of breaking the concrete road surface, and the traffic is affected during the construction period, which greatly disturbs the smooth traffic, and also greatly limits the laying period of the drainage pipe. SUMMARY

[0004] The present application provides a method for laying a drainage pipe under a road surface to solve the problem of affecting traffic during laying a drainage pipe under an existing concrete road surface.

[0005] To solve the above technical problems, the technical solution adopted by the present application is as follows:

[0006] A method for laying a drainage pipe under a road surface, comprising the following construction steps:

[0007] S1: excavating a starting pit and a receiving pit on both sides of the road surface, and the connecting line between the starting pit and the receiving pit is the laying path of the drainage pipe;

[0008] S2: using a horizontal spiral drill to perform horizontal drilling from the side wall of the starting pit or the side wall of the receiving pit, or simultaneously from the side wall of the starting pit and the side wall of the receiving pit, to finally form a connected laying channel between the starting pit and the receiving pit;

[0009] S3: opening a buried groove along the length direction of the laying channel in the side wall of the laying channel, and laying and installing a track in the buried groove;

[0010] S4: fixing a sliding member on the side of the drainage pipe, slidingly installing the sliding member in the installation track, driving the sliding member to move along the installation track, until the drainage pipe is pulled from the starting pit to the side of the receiving pit along the laying channel, to complete the laying of the drainage pipe.

[0011] Further, steel ring supports are arranged in the laying channel along the length direction of the laying channel, and the steel ring supports are anchored into the stratum around the laying channel.

[0012] Further, in the step S2, the side walls of the starting foundation and the receiving foundation are poured to form a guide section, which is partially poured on the side walls of the starting foundation and the receiving foundation and partially poured on the inner wall of the laying channel.

[0013] Further, in the drilling process, if hole collapse occurs, partial jet grouting support is performed on the side wall of the hole.

[0014] Further, the horizontal spiral drill comprises a plurality of drill rod sections, adjacent two drill rod sections are detachably connected, and the spiral blades of adjacent two drill rod sections are smoothly connected.

[0015] Further, the installation rail is provided with a traction cable capable of moving along the installation rail, and the traction cable is connected with the sliding part.

[0016] Further, the horizontal drilling construction in the step S2 and the installation rail construction in the step S3 are simultaneously performed; and when the laying channel is excavated, a slide rail is laid at the bottom of the laying channel, and a residue hopper car for loading and transporting residue is slidably installed on the slide rail.

[0017] Further, after the laying channel is constructed, the inner diameter of the whole section at the minimum inner diameter is S1, and the outer diameter of the drainage pipe is S2, wherein 3cm≤S1-S2≤5cm.

[0018] Further, the installation rail is provided with a grouting channel penetrating through the installation rail in the length direction, and a plurality of grouting sub-channels are arranged on the installation rail in the length direction, and the two ends of the grouting sub-channels are respectively communicated with the inside of the laying channel and the grouting channel.

[0019] Further, after the step S4 is constructed, concrete is poured in the gap between the guide section and the drainage pipe to close the two ends of the laying channel, and grouting is filled in the gap between the drainage pipe and the side wall of the laying channel by using the grouting channel.

[0020] The present application can achieve the following beneficial effects:

[0021] 1. The starting foundation and the receiving foundation are excavated on both sides of the road surface respectively, the laying channel is formed by simultaneously excavating the starting foundation and the receiving foundation, so that the concrete road surface does not need to be broken when the drainage channel is excavated, and the normal operation of the road surface above is not affected; the installation rail is laid by excavating the embedded groove when the laying channel is excavated, and the installation of the drainage pipe through the laying channel is more convenient and smooth.

[0022] 2. The steel ring support is formed by interval pouring, and the jet grouting support is performed at the hole collapse position, which can support the laying channel, reduce the influence of the excavation of the laying channel on the bearing capacity of the road surface above, and also help to maintain the structural stability of the inside of the laying channel and improve the construction safety.

[0023] 3、Set grouting channel and grouting branch, after the later stage drain pipe passes through the road surface, can fill the gap between the drain pipe and the inner wall of the laying channel by using the grouting channel and the grouting branch, and further reduce the influence of drain pipe laying on the stability of the road surface foundation. BRIEF DESCRIPTION OF DRAWINGS

[0024] The application will be further described below in combination with the drawings and examples:

[0025] Figure 1 From top to bottom, they are respectively the vertical section view and the plan view of the step S1 of the construction method of the drain pipe laying under the road surface of the application after the construction is completed;

[0026] Figure 2 From top to bottom, they are respectively the vertical section view and the plan view of the step S2 of the construction method of the drain pipe laying under the road surface of the application after the construction is completed;

[0027] Figure 3 It is the partial structure schematic view of the horizontal spiral drill of the application;

[0028] Figure 4 It is the vertical section view of the step S3 of the construction method of the drain pipe laying under the road surface of the application after the construction is completed;

[0029] Figure 5 It is the partial structure schematic view of the installation track of the application;

[0030] Figure 6 It is the laying channel cross section view of the application for showing the arrangement of the grouting channel and the grouting branch;

[0031] Figure 7 It is the vertical section view of the step S4 of the construction method of the drain pipe laying under the road surface of the application after the construction is completed.

[0032] In the drawings, the component list represented by each sign is as follows:

[0033] 1, starting foundation pit; 2, receiving foundation pit; 3, laying channel; 4, buried groove; 5, installation track; 51, grouting channel; 52, grouting branch; 6, drain pipe; 7, sliding member; 8, steel ring support; 9, guide section; 10, horizontal spiral drill; 11, traction cable; 12, slide rail; 13, slag hopper car;

[0034] 200, road surface. DETAILED DESCRIPTION

[0035] For the purpose of facilitating the understanding of the present application, a more complete description of the present application will be provided with reference to the accompanying drawings. The embodiments of the present application are shown in the drawings. However, the present application 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 application more thorough and comprehensive.

[0036] As shown in Figures 1 to 7 The present application provides a construction method for laying a municipal drainage pipe under a road surface. Typically, the pipe diameter of the municipal drainage pipe 6 is between 1000 mm and 3000 mm, and according to the municipal planning requirements, the width of each lane of the motor vehicle is 3.75-4 m. When the municipal drainage pipe network is reconstructed or additional drainage pipes are added, if the drainage pipes need to cross the municipal road, the road needs to be closed on both sides and excavated separately for construction, which causes traffic congestion and damage to the concrete road surface. The construction method of the present application can realize the laying of the drainage pipe 6 with a pipe diameter of 1800 mm-3000 mm under the concrete road surface for different widths of the road surface, and does not affect the normal traffic of the road surface during the laying construction process.

[0037] A laying construction method of a drainage pipe under a road surface, comprising the following construction steps:

[0038] Step one: excavate a starting pit 1 and a receiving pit 2 on both sides of the road surface 200, and the connecting line between the starting pit 1 and the receiving pit 2 is the laying path of the drainage pipe 6. The distance between the starting pit 1 and the receiving pit 2 is at least more than 5 m from both sides of the road surface 200, so as to reduce the influence of the excavation of the starting pit 1 and the receiving pit 2 on the normal transportation of the road surface 200.

[0039] Step two: simultaneously perform horizontal drilling from the side wall of the starting pit 1 and the side wall of the receiving pit 2 by using a horizontal spiral drill 10. If the width of the road surface 200 is relatively narrow, it can also be excavated from only one side until it communicates with the pit on the other side through the road surface 200. Both sides are excavated at the same time, which is more efficient, but in order to realize the precise butt joint of the excavation channels on both sides, the construction precision of the excavation route is required to be higher. Finally, a communication laying channel 3 is formed between the starting pit 1 and the receiving pit 2.

[0040] After the laying channel 3 is excavated, the inner diameter of the full section of the minimum inner diameter is S1, and the outer diameter of the drainage pipe 6 is S2, which needs to satisfy 3 cm≤S1-S2≤5 cm, so that the drainage pipe 6 can be smoothly laid in the laying channel 3, and the gap between the drainage pipe 6 and the inner wall of the laying channel 3 is small, which reduces the difficulty of filling the gap between the drainage pipe 6 and the inner wall of the laying channel 3 in the subsequent steps.

[0041] In the present application, the horizontal auger 10 comprises a plurality of drill pipe segments, and adjacent two drill pipe segments are detachably spliced. After the adjacent two drill pipe segments are spliced, the spiral blades are smoothly connected. The use of the horizontal auger 10 for drilling can realize the requirement of drilling and discharging the slag soil at the same time, thereby reducing the steps of discharging the slag soil. The horizontal auger 10 is arranged in a plurality of drill pipe segments. After a drill pipe segment drills into the first layer, the next drill pipe segment is installed and spliced, and drilling continues, so that the construction operation area required by the horizontal auger 10 is small, thereby reducing the excavation area of the starting pit 1 and the receiving pit 2.

[0042] For a road surface 200 with a relatively wide width, a single horizontal auger 10 cannot achieve drilling of half the width of the road surface 200. The drilling can be achieved in multiple times. After the first horizontal auger 10 completes drilling, the sidewall of the drill hole is supported and treated. After the support and treatment are completed, the construction personnel enter the drill hole to erect a drill from the excavation surface to drill the second horizontal auger 10. If the drill cannot enter the drill hole to drill the horizontal auger 10 during the second drilling construction, the second drilling construction can use manual excavation to achieve drilling.

[0043] During initial drilling and excavation, after the horizontal drilling point is determined, a guide section 9 is formed by pouring concrete on the sidewall of the starting pit 1 and the receiving pit 2. The guide section 9 is partially poured on the sidewall of the starting pit 1 and the receiving pit 2 and partially poured on the inner wall of the laying channel 3. Pouring the guide section 9 can maintain the stability of the soil layer in the starting area of the horizontal drill hole and reduce the occurrence of hole collapse. On the other hand, the guide section 9 can guide the path of the horizontal drill hole and reduce the occurrence of deviation during drilling.

[0044] A support structure is formed inside the laying channel 3, and the construction of the support structure is synchronized with the drilling of the laying channel 3. Specifically, after the first horizontal auger 10 completes drilling, the sidewall of the drill hole can be supported and constructed. If manual excavation is used for the second channel excavation, the inner wall of the channel can be supported while excavating.

[0045] The support structure construction includes the following aspects. Firstly, steel ring supports 8 are arranged at intervals in the laying channel 3. The arrangement interval of the steel ring supports 8 can be determined according to the bearing capacity of the soil layer. The steel ring supports 8 are anchored to the stratum around the drill hole by anchor rods or anchor nails. The steel ring supports 8 are used for support to reduce the influence of the movement of vehicles above on the stability of the laying channel 3 below. The support structure construction also includes the following aspect. In the hole collapse area or the local area where the soil layer is loose and the slag soil falls, local guniting support is performed to maintain the stability of the inner wall of the laying channel 3.

[0046] Step three: a buried groove 4 is opened along the length direction of the laying channel 3 on the side wall of the laying channel 3, the buried groove 4 is symmetrically opened with two, and the installation track 5 is longitudinally laid in the buried groove 4. If the horizontal spiral drill 10 is used for drilling, the opening of the buried groove 4 is carried out after the drilling and the supporting structure construction are completed; if there is a manual excavation section, the opening of the buried groove 4 can be carried out while excavating. The opening of the buried groove 4 and the laying of the installation track 5 can also be carried out synchronously, and the installation track 5 is segmented and placed in the buried groove 4, and then the installation track 5 is anchored and fixed with the surrounding soil layer by using the anchor nail.

[0047] After the first horizontal drilling construction is completed, the installation of the buried groove 4 and the installation track 5 is carried out, and the slide rail 12 can also be laid on the bottom of the channel formed by the first horizontal drilling excavation; before the second horizontal drilling, the slag hopper car 13 for loading slag is slidably arranged on the slide rail 12, the slag hopper car 13 is used for transporting the slag generated by the second horizontal drilling, and the slag can be more efficiently and labor-savingly transported out by using the slide rail 12 and the slag hopper car 13.

[0048] Step four: the drainage pipe 6 is laid, the sliding part 7 is fixed on the side of the end of the drainage pipe 6, and the sliding part 7 is slidably installed in the installation track 5. Specifically, the installation track 5 is provided with the traction cable 11 along the length direction in the installation of the installation track 5 in the last step. When the drainage pipe 6 is laid, the sliding part 7 and the drainage pipe 6 can be driven along the installation track 5 by using the traction cable 11, so that the drainage pipe 6 is dragged from the starting pit 1 to one side of the receiving pit 2 along the laying channel 3, and the laying of the drainage pipe 6 is completed. It should be noted that the slide rail 12 and the slag hopper car 13 have been removed when the drainage pipe 6 is laid.

[0049] Further, the grouting channel 51 is longitudinally and penetratively arranged in the installation track 5, and a plurality of grouting sub-channels 52 are arranged on the installation track 5 along the length direction at intervals. The two ends of each grouting sub-channel 52 are respectively communicated with the inside of the laying channel 3 and the grouting channel 51. After the drainage pipe 6 is laid, the gap between the guide section 9 and the drainage pipe 6 is grouted with concrete, the two ends of the laying channel 3 are closed, and then the grouting channel 51 and the grouting sub-channel 52 are used for grouting and filling the gap between the drainage pipe 6 and the side wall of the laying channel 3. The gap between the drainage pipe 6 and the side wall of the laying channel 3 can be filled with mud mixed with cement slurry, and the slurry strength is lower than the filling strength of the concrete between the guide section 9 and the drainage pipe 6.

[0050] The above only describes the preferred embodiments of the present application, and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for laying drainage pipes under road surfaces, characterized in that, The construction steps include the following: S1: Excavate the starting pit (1) and receiving pit (2) on both sides of the road surface (200), and the line connecting the starting pit (1) and receiving pit (2) is the laying path of the drainage pipe (6); S2: Use a horizontal auger (10) to drill horizontally from the side wall of the starting pit (1) or the side wall of the receiving pit (2), or drill horizontally from the side wall of the starting pit (1) and the side wall of the receiving pit (2) at the same time. If the hole collapses during the drilling process, spray grouting is carried out locally on the side wall of the hole to support it. Finally, a connecting laying channel (3) is formed between the starting pit (1) and the receiving pit (2). Steel ring supports (8) are provided at intervals along the length of the laying channel (3), and the steel ring supports (8) are anchored to the strata around the laying channel (3). The horizontal auger (10) includes multiple drill rod sections, which can be detachably spliced ​​together with adjacent drill rod sections, and the auger blades of adjacent drill rod sections are smoothly connected. S3: A burial trench (4) is opened along the length of the laying channel (3) on the side wall of the laying channel (3), and an installation track (5) is laid along the length of the burial trench (4). S4: Fix a sliding member (7) around the drainage pipe (6). The sliding member (7) is slidably installed in the installation track (5). A traction cable (11) that can move along the installation track (5) is installed along the entire length of the installation track (5). The traction cable (11) is connected to the sliding member (7) and drives the sliding member (7) to move along the installation track (5) until the drainage pipe (6) is pulled from the starting pit (1) along the laying channel (3) to the receiving pit (2) side, thus completing the laying of the drainage pipe (6). The installation track (5) has a grouting channel (51) running through it, and the installation track (5) has several grouting channels (52) spaced along its length. The two ends of the grouting channels (52) are connected to the interior of the laying channel (3) and the grouting channel (51), respectively. After the S4 step is completed, concrete is poured into the gap between the guide section (9) and the drainage pipe (6) to seal both ends of the laying channel (3), and grout is injected into the gap between the drainage pipe (6) and the side wall of the laying channel (3) using the grouting channel (51).

2. The method for laying drainage pipes under road surfaces according to claim 1, characterized in that: In step S2, the sidewalls of the starting pit (1) and the receiving pit (2) are cast to form guide sections (9). The guide sections (9) are partially cast on the sidewalls of the starting pit (1) and the receiving pit (2) and partially cast on the inner wall of the laying channel (3).

3. The method for laying drainage pipes under road surfaces according to claim 1, characterized in that: In step S2, the horizontal drilling construction and in step S3, the excavation of the buried trench (4) and the installation of the track (5) are carried out simultaneously; and when the laying channel (3) is excavated in step S2, a slide rail (12) is laid at the bottom of the laying channel (3), and a slag hopper car (13) for loading and transporting slag is slidably installed on the slide rail (12).

4. The method for laying drainage pipes under road surfaces according to claim 1, characterized in that: After the laying channel (3) is completed, the inner diameter at the minimum inner diameter of the entire section is S1, and the outer diameter of the drainage pipe (6) is S2, wherein 3cm≤S1-S2≤5cm.

Images