Method for reducing water content of runway groove bottom soil base soil

Abstract

The invention relates to the technical field of road construction, in particular to a method for reducing the soil moisture content of a runway groove bottom soil matrix, which comprises the following steps: determining the upstream face position of an underground water channel based on exploration data of a runway pre-excavation position; based on the upstream face position of the underground water channel, a full-length intercepting ditch is excavated between a design side line on each side of the runway and the upstream face position of the underground water channel; based on the position of the full-length intercepting ditch, a plurality of transverse intercepting ditches are dug below the full-length intercepting ditch at equal intervals; on the basis of the positions of the transverse intercepting ditches, open drainage ditches are excavated below the transverse intercepting ditches, and the transverse intercepting ditches are connected with the open drainage ditches through HDPE pipes; a runway groove is excavated after a transverse intercepting ditch and a drainage open ditch are connected through an HDPE pipe, permeable geotextile is laid at the bottom of a through intercepting ditch through a laying device, then the through intercepting ditch is backfilled through hill-skill stones or broken stones, a permanent drainage blind ditch is formed, the water head-on position of an underground water channel can be accurately obtained through exploration data, and the construction efficiency is improved. And the intercepting ditch is dug for drainage, so that the construction difficulty is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of road construction, and in particular to a method for reducing the moisture content of soil at the bottom of a runway groove. Background Art

[0002] Since the silty strata have extremely high water content, the formation water will pose a serious threat to the stability of the road channel. Reducing the soil moisture content of the road is important for enhancing road stability, improving durability, improving drainage performance, protecting the environment and ecosystem, improving traffic safety, saving maintenance costs, and adapting to different climatic conditions. Through the reasonable setting of drainage systems, the use of permeable materials, strengthening soil improvement and regular monitoring and maintenance, the goal of reducing soil moisture content can be effectively achieved to ensure the safety, stability and long-term operation of the road.

[0003] However, in the prior art, in order to avoid threats to the stability of the road trench, it is often necessary to dig 1 meter deep from the original ground to reach the designed elevation after the construction is completed, and the construction process is extremely complicated. Summary of the invention

[0004] The present invention provides a method for reducing the moisture content of soil at the bottom of a runway groove, so as to solve the problem raised in the background technology.

[0005] In order to achieve the above-mentioned invention object, the present invention provides the following technical solution: a method for reducing the moisture content of the soil foundation of the runway groove, comprising the following steps:

[0006] Based on the exploration data of the runway pre-excavation location, determine the location of the waterfront of the underground waterway;

[0007] Based on the location of the waterfront of the underground waterway, a full-length intercepting ditch is excavated between the design edge line on each side of the runway and the waterfront of the underground waterway;

[0008] Based on the location of the through-length intercepting ditch, multiple transverse intercepting ditches are dug at equal intervals below it;

[0009] Based on the location of the transverse intercepting ditch, an open drainage ditch is excavated below it, and the transverse intercepting ditch is connected to the open drainage ditch using a HDPE pipe;

[0010] After connecting the transverse intercepting ditch with the open drainage ditch using HDPE pipes, the runway trench is excavated and a permeable geotextile is laid at the bottom of the full-length intercepting ditch using a laying device. The full-length intercepting ditch is then backfilled with mountain stones or crushed stones to form a permanent drainage blind ditch.

[0011] Preferably, when acquiring the exploration data, formation samples are obtained by geological drilling.

[0012] Preferably, after obtaining the formation sample by geological drilling, an empirical value of the formation permeability coefficient is obtained by a constant pressure method, which is 0.01 m / d.

[0013] Preferably, after obtaining the empirical value of the formation permeability coefficient of 0.01m / d by the constant pressure method, the groundwater level fluctuation is determined to be 1-2m based on the water level well detection method, and finally the water head position of the groundwater channel is determined to be 0.70-3.50m below the natural ground.

[0014] Preferably, when a full-length intercepting ditch is excavated between the designed edge line on each side of the runway and the water-facing surface of the underground waterway based on the position of the water-facing surface of the underground waterway, based on the water-facing surface position of the underground waterway being 0.70-3.50m below the natural ground, the distance between the designed full-length intercepting ditch and the designed edge line on one side of the runway is 10m.

[0015] Preferably, the distance between two adjacent transverse intercepting ditches is 100 m.

[0016] Preferably, when the transverse intercepting ditch is connected to the open drainage ditch using an HDPE pipe, a HDPE pipe with a diameter of 200 mm is used.

[0017] Preferably, the laying device includes: a mounting frame, a guide wheel, a guide roller, a storage roller, a gluing mechanism and a power mechanism, one end of the bottom of the mounting frame is rotatably connected to the guide wheel, the other end of the bottom of the mounting frame is rotatably connected to a rotating shaft, the rotating shaft is connected to the guide roller, the mounting frame is rotatably connected to the storage roller, the mounting frame is connected to the gluing mechanism, the output end of the gluing mechanism is arranged toward the top of the guide roller, and the rotating shaft is connected to the gluing mechanism through the power mechanism.

[0018] Preferably, the glue coating mechanism includes: a glue storage tank, a glue outlet pipe and a glue adding pipe, the top of the mounting frame is connected to the glue storage tank, the bottom of the glue storage tank is connected to the top of the glue outlet pipe, and the top of the glue storage tank is connected to the bottom of the glue adding pipe.

[0019] Preferably, the glue coating mechanism also includes: a pump casing, a pump shaft and pump blades, the bottom end of the glue outlet pipe is connected to one side of the pump casing, the pump shaft is rotatably connected inside the pump casing, a plurality of pump blades are connected to the pump shaft, the pump blades are placed in the pump casing, and the side wall of one end of the pump shaft placed outside the pump casing is connected to a pulley in the power mechanism, the pulley is connected to the second pulley through a belt, the second pulley is installed on the rotating shaft, and the other side of the pump casing is connected to the second side of the pump casing through a connecting pipe.

[0020] The beneficial effects of the present invention are as follows:

[0021] In the scheme of the present invention:

[0022] By using the exploration data, the water headwater position of the underground waterway can be accurately obtained, and then intercepting ditches can be dug to drain the water, reducing the difficulty of construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a flow chart of the present invention;

[0024] Figure 2 It is a schematic diagram of the structure of the laying device of the present invention;

[0025] Figure 3 This is a schematic diagram of the installation position of the glue storage tank of the present invention;

[0026] Figure 4 A cross-sectional view of a pump casing of the present invention;

[0027] Figure 5 It is a second cross-sectional view of the pump casing of the present invention;

[0028] Figure 6 It is a schematic diagram of the connection relationship between the spring 2 and the heat sink of the present invention;

[0029] Figure 7 It is a schematic diagram of the connection relationship between the pump shaft and the gear of the present invention.

[0030] Wherein: laying device 1, mounting frame 2, guide wheel 3, guide roller 4, receiving roller 5, glue coating mechanism 6, power mechanism 7, glue storage tank 8, glue outlet pipe 9, glue adding pipe 10, pump casing 11, pump shaft 12, pump blade 13, pulley 14, belt 15, pulley 2 16, rotating shaft 17, connecting pipe 18, pump casing 2 19, connecting pipe 2 20, output pipe 21, pulley 3 22, belt 2 23, pulley 4 24, rotating shaft 25, turntable 26, circular hole 27, receiving cavity 28, circular hole 29, spring 30, pressure column 31, lifting casing 32, spring 2 33, heat sink 34, expansion cavity 35, connecting rod 36, mounting pipe 37, sleeve 38, spring 3 39, guide block 40, chamfer 41, mounting ring 42, guide ring 43, chamfer 2 44, sleeve 2 45, fan blade 46, gear ring 47, gear 48. DETAILED DESCRIPTION

[0031] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0032] Example 1: Reference Figure 1-Figure 7 A method for reducing the moisture content of soil at the bottom of a runway groove comprises the following steps:

[0033] Based on the exploration data of the runway pre-excavation location, determine the location of the waterfront of the underground waterway;

[0034] Based on the location of the waterfront of the underground waterway, a full-length intercepting ditch is excavated between the design edge line on each side of the runway and the waterfront of the underground waterway;

[0035] Based on the location of the through-length intercepting ditch, multiple transverse intercepting ditches are dug at equal intervals below it;

[0036] Based on the location of the transverse intercepting ditch, an open drainage ditch is excavated below it, and the transverse intercepting ditch is connected to the open drainage ditch using a HDPE pipe;

[0037] After connecting the transverse intercepting ditch with the open drainage ditch using HDPE pipe, the runway trench is excavated, and the permeable geotextile is laid at the bottom of the full-length intercepting ditch using the laying device 1. The full-length intercepting ditch is then backfilled with mountain stones or crushed stones to form a permanent drainage blind ditch.

[0038] The principles and beneficial effects of the above scheme are:

[0039] Conduct geological surveys at the pre-excavation location of the runway to obtain exploration data, and then obtain the location of the water-facing surface of the underground waterway. Since the moisture content of the silty clay stratum is too high, and the groundwater type in this type of stratum is phreatic water, which is stored in large quantities in the stratum, in order to prevent groundwater from seeping into the runway trench after the construction is completed, after obtaining the location of the water-facing surface of the underground waterway, a full-length intercepting ditch is excavated at 10m on both sides of the runway design edge line, and the surface runoff water is collected and discharged through the full-length intercepting ditch. Subsequently, multiple lateral intercepting ditches are excavated below the full-length intercepting ditch to improve the collection efficiency of surface runoff water. The transverse intercepting ditch is further connected to the open drainage ditch through HDPE pipes to increase the discharge efficiency of runoff water. HDPE pipes are high-density polyethylene pipes, which have the characteristics of high strength and strong impact resistance. The use of HDPE pipes increases the stability of the connection between the transverse intercepting ditch and the open ditch. Finally, permeable geotextiles are laid on the bottom wall of the full-length intercepting ditch to prevent soil loss.

[0040] By using the exploration data, the water headwater position of the underground waterway can be accurately obtained, and then intercepting ditches can be dug to drain the water, reducing the difficulty of construction.

[0041] Example 2: Reference Figure 1-Figure 7 When acquiring the exploration data, stratum samples are obtained through geological drilling.

[0042] The principles and beneficial effects of the above scheme are:

[0043] Obtaining formation samples through geological drilling can effectively determine the composition of the formation, and then select appropriate methods to obtain experimental data.

[0044] Example 3: Reference Figure 1-Figure 7 After obtaining the formation sample through geological drilling, the empirical value of the formation permeability coefficient is obtained by the constant pressure method, which is 0.01m / d.

[0045] The principles and beneficial effects of the above scheme are:

[0046] When determining the empirical value of the formation permeability coefficient as 0.01 m / d, the constant pressure method in the prior art is selected, which greatly improves the efficiency of determining the empirical value of the formation permeability coefficient.

[0047] Example 4: Reference Figure 1-Figure 7 After obtaining the empirical value of the formation permeability coefficient of 0.01m / d through the constant pressure method, the groundwater level fluctuation is determined to be 1-2m based on the water level well detection method, and finally the water front position of the groundwater channel is determined to be 0.70-3.50m below the natural ground.

[0048] The principles and beneficial effects of the above scheme are:

[0049] When determining the groundwater level fluctuation, the groundwater headwater position can also be obtained at the same time, which greatly improves the efficiency of determining the groundwater headwater position.

[0050] Example 5: Reference Figure 1-Figure 7 Based on the position of the water front surface of the underground waterway, a full-length intercepting ditch is excavated between the designed edge line on each side of the runway and the water front surface of the underground waterway. Based on the water front position of the underground waterway being 0.70-3.50m below the natural ground, the distance between the designed full-length intercepting ditch and the designed edge line on one side of the runway is 10m.

[0051] The principles and beneficial effects of the above scheme are:

[0052] The intercepting ditch is set between the water face of the underground water channel and the design line of the runway. After obtaining the water face position of the underground water channel at 0.70-3.50m below the natural ground, in order to absorb the water in the stratum and surface runoff water to the greatest extent, the distance between the designed full-length intercepting ditch and the designed edge line of one side of the runway is designed to be 10m.

[0053] Example 6: Reference Figure 1-Figure 7 The distance between two adjacent transverse intercepting ditches is 100m.

[0054] The principles and beneficial effects of the above scheme are:

[0055] The spacing between the transverse intercepting ditches is set to 100m, which can assist in collecting the runoff water under the full-length intercepting ditch and further improve the stability of the trench after construction.

[0056] Example 7: Reference Figure 1-Figure 7 When the transverse intercepting ditch is connected to the open drainage ditch using an HDPE pipe, a HDPE pipe with a diameter of 200 mm is used.

[0057] The principles and beneficial effects of the above scheme are:

[0058] After connecting the transverse intercepting ditch with the open drainage ditch using HDPE pipe, since the diameter of the HDPE pipe is 200mm, the water in the transverse intercepting ditch can be quickly discharged into the open drainage ditch to avoid the ditch from being soaked. At the same time, the diameter of the HDPE pipe is 200mm, which can also prevent debris from clogging the pipe structure during the drainage process.

[0059] Example 8: Reference Figure 1-Figure 7 The paving device 1 includes: a mounting frame 2, a guide wheel 3, a guide roller 4, a storage roller 5, a gluing mechanism 6 and a power mechanism 7. One end of the bottom of the mounting frame 2 is rotatably connected to the guide wheel 3, and the other end of the bottom of the mounting frame 2 is rotatably connected to a rotating shaft 17, and the rotating shaft 17 is connected to the guide roller 4, and the mounting frame 2 is rotatably connected to the storage roller 5. The mounting frame 2 is connected to the gluing mechanism 6, and the output end of the gluing mechanism 6 is arranged toward the top of the guide roller 4, and the rotating shaft 17 is connected to the gluing mechanism 6 through the power mechanism 7.

[0060] The principle of the above scheme is:

[0061] The permeable geotextile is stored by the storage roller 5, and the permeable geotextile is wound on the guide roller 4, and the end of the permeable geotextile is arranged toward the guide wheel 3;

[0062] The commonly used permeable geotextiles in the prior art are mostly mechanically fixed: that is, the permeable geotextile is fixed to the bottom wall of the full-length intercepting ditch by anchor nails, buckles or ropes, or the permeable geotextile is welded to the bottom wall of the full-length intercepting ditch by a hot melt welder and a hot air gun. The former is easy to cause the connection parts of the permeable geotextile to loosen or the permeable geotextile to tear during the freeze-thaw cycle after fixation, while the latter is easy to cause the permeable geotextile to be damaged during hot melt welding, which can be seen that the water interception function will fail;

[0063] Therefore, the present application utilizes the glue coating mechanism 6 to bond the permeable geotextile to the bottom wall of the full-length intercepting ditch. The moving direction of the device when paving the permeable geotextile is specifically to push the mounting frame 2 to move. Under the guidance of the guide wheel 3, the mounting frame 2 moves from the end of the device to the other end thereof. With the movement of the device, the permeable geotextile is laid on the bottom wall of the full-length intercepting ditch, and the collecting roller 5 releases the permeable geotextile when the device is working. During the movement of the device, the guide roller 4 rotates clockwise synchronously with the rotating shaft 17. The rotating shaft 17 drives the glue coating mechanism 6 to work through the power mechanism 7, and the glue in the glue coating mechanism 6 is applied to the permeable geotextile above the guide roller 4. With the rotation of the guide roller 4, the permeable geotextile after being coated with glue is firmly bonded to the bottom wall of the full-length intercepting ditch. When the laying of the permeable geotextile is completed, it can be cut with a tool to complete the laying.

[0064] The glue used in the bonding process of permeable geotextile is polyurethane glue, which has excellent bonding strength and weather resistance.

[0065] The beneficial effects of the above scheme are:

[0066] The device applies glue to the permeable geotextile by setting a glue coating mechanism 6, and uses glue bonding to achieve bonding of the permeable geotextile to the bottom wall of the full-length intercepting ditch, which greatly improves the bonding strength. The permeable geotextile will not be torn during dynamic freeze-thaw cycles. Therefore, the bonded permeable geotextile can be used in a variety of climatic environments, has extremely high practicality, and has extremely high laying efficiency.

[0067] Example 9: Reference Figure 1-Figure 7 The glue coating mechanism 6 includes: a glue storage tank 8, a glue outlet pipe 9 and a glue adding pipe 10. The top of the mounting frame 2 is connected to the glue storage tank 8, the bottom of the glue storage tank 8 is connected to the top of the glue outlet pipe 9, and the top of the glue storage tank 8 is connected to the bottom of the glue adding pipe 10.

[0068] The principles and beneficial effects of the above scheme are:

[0069] The polyurethane glue in the glue storage tank 8 is added through the glue adding hose 10, and when the glue is output through the glue adding hose 10, the glue adding hose 10 can connect the glue storage tank 8 with the external environment, so the glue adding hose 10 has sufficient air pressure to output the glue;

[0070] After the glue output is completed, an organic solvent can be added to the glue storage tank 8 through the glue adding hose 10. The organic solvent is specifically a toluene solution with a strong glue removal function. The addition of the organic solvent can quickly remove the residual glue in the glue storage tank 8 and the glue outlet hose 9.

[0071] Example 10: Reference Figure 1-Figure 7 The glue coating mechanism 6 also includes: a pump casing 11, a pump shaft 12 and pump blades 13. The bottom end of the glue outlet pipe 9 is connected to one side of the pump casing 11. The pump shaft 12 is rotatably connected in the pump casing 11. A plurality of pump blades 13 are connected to the pump shaft 12. The pump blades 13 are placed in the pump casing 11. The pump shaft 12 is placed outside the pump casing 11. The side wall of one end is connected to the pulley 14 in the power mechanism 7. The pulley 14 is connected to the second pulley 16 through a belt 15. The second pulley 16 is installed on the rotating shaft 17. The other side of the pump casing 11 is connected to the side of the second pump casing 19 through a connecting pipe 18.

[0072] The principle of the above scheme is:

[0073] The polyurethane glue itself has a certain viscosity, so it needs to be promoted to flow by applying external force when it is output. When the device starts to move, the clockwise rotation of the guide roller 4 drives the rotation of the rotating shaft 17, and the synchronous rotation of the pulley 16 drives the belt 15 to move, thereby driving the rotation of the pulley 14 and the pump shaft 12. At the same time, the pump blade 13 rotates, and the glue is drawn into the pump housing 11 through the glue outlet pipe 9, and then input into the pump housing 19 through the connecting pipe 18.

[0074] The beneficial effects of the above scheme are:

[0075] A pulley 14 is arranged in the device and is connected to a second pulley 16 through a belt 15. The second pulley 16 is mounted on a rotating shaft 17. Therefore, when the device moves, the rotation of the rotating shaft 17 can eventually drive the rotation of the pump shaft 12 to achieve the suction of the glue, thereby reducing the setting of the power mechanism in the device and thus reducing the complexity of the device.

[0076] Since the polyurethane glue itself has a certain viscosity, a pump blade 13 is provided in the device to transport the glue, thereby increasing the pressure on the glue during transportation and preventing the glue from sticking inside the device;

[0077] Since the pump blade 13 has a large contact area, the glue can fully rub against the pump blade 13 when being transported in the pump housing 11. The increase in friction increases the temperature of the glue itself, thereby increasing its fluidity and further reducing the flow rate of the glue. At the same time, when the device is used in a low temperature environment, the heat generated by friction can increase its fluidity, preventing the glue from sticking to the inside of the device, greatly improving the ability of the device to work normally in different environments.

[0078] Example 11: Reference Figure 1-Figure 7 The glue coating mechanism 6 also includes: a pump housing 19, a connecting pipe 20 and an output pipe 21. The bottom of the pump housing 19 is connected to the top of the connecting pipe 20 through a transfer pipe. The bottom of the connecting pipe 20 is connected to the top of multiple output pipes 21, and the bottom of the output pipe 21 is arranged toward the top of the guide roller 4.

[0079] The principle of the above scheme is:

[0080] The glue enters the second pump casing 19 through the connecting pipe 18, and the glue in the second pump casing 19 enters the second connecting pipe 20 through the transfer pipe, flows into the multiple output pipes 21 through the connecting pipe 20, and flows onto the permeable geotextile through the output pipes 21.

[0081] The beneficial effects of the above scheme are:

[0082] A plurality of output pipes 21 connected to the connecting pipe 20 are arranged in the mechanism, thereby increasing the uniformity of the glue output to the permeable geotextile when the glue is output to the permeable geotextile. Furthermore, when the permeable geotextile is rolled by the rotating guide roller 4, the glue is spread horizontally, thereby increasing the bonding area between the permeable geotextile and the full-length intercepting ditch.

[0083] Example 12: Reference Figure 1-Figure 7The pump shaft 12 is placed outside the pump housing 11 and is connected to a pulley 3 22 at one end thereof. The pulley 3 22 is connected to a pulley 4 24 through a belt 23. The pulley 4 24 is mounted on a rotating shaft 25. The rotating shaft 25 is rotationally connected to the pump housing 2 19. The end of the rotating shaft 25 placed inside the pump housing 2 19 is connected to a turntable 26. The turntable 26 is rotationally sealed with the pump housing 2 19. An end of a circular hole 27 is opened on one side of the turntable 26. The circular hole 27 is coaxially arranged with the connecting pipe 18. The other end of the circular hole 27 is connected to an inner wall on one side of a receiving chamber 28 in the turntable 26. An end of a circular hole 29 is opened on the inner wall on the other side of the receiving chamber 28. The circular hole 29 is coaxially arranged with the circular hole 27. The inner wall of the circular hole 29 is connected to an end of a spring 30. The other end of the spring 30 is connected to an end of a pressure column 31. The pressure column 31 is slidingly sealed with the circular hole 29.

[0084] The principle of the above scheme is:

[0085] When the pump shaft 12 rotates, the pulley 3 22 rotates synchronously, and the pulley 4 24 and the rotating shaft 2 25 are driven to rotate through the belt 2 23. At this time, the turntable 26 rotates synchronously, and the glue in the connecting tube 18 enters the receiving chamber 28 through the circular hole 27;

[0086] When the device moves at a fast speed, the volume of glue output from the connecting pipe 18 is large. Under the effect of the large centrifugal force generated when the turntable 26 rotates and the relatively large volume of glue, the pressure on the pressure column 31 is large, and the degree of compression of the spring 30 is large.

[0087] When the device moves slowly, the volume of glue output from the connecting pipe 18 is small. Under the effect of the small centrifugal force generated when the turntable 26 rotates and the relatively small increase in the volume of glue, the pressure on the pressure column 31 is small, and the degree of compression of the spring 30 is small.

[0088] When the rotating disk 26 continues to rotate, the round hole 27 is connected to the transfer tube, and the glue enters the connecting tube 20. Since the rotating disk 26 is provided with the round hole 27, the rotating disk 26 and the pump housing 19 are rotationally sealed, so the glue finally output through the output tube 21 is in an intermittent output state.

[0089] When the device stops moving, the circular hole 27 is connected to the connecting pipe 20 for the last time. Under the action of gravity and the elastic force of the spring 30 , the pressure column 31 moves downward and returns to its original position, and the residual glue in the receiving chamber 28 is discharged through the circular hole 27 .

[0090] The beneficial effects of the above scheme are:

[0091] A circular hole 27 is provided on the rotating disk 26, so that glue can be intermittently output from the output pipe 21 to the water-permeable geotextile, so as to prevent the waste of glue caused by the excessive output speed of glue, and to prevent the overflow of glue on the water-permeable geotextile after laying, and to prevent the glue from adhering to other devices or operators, so as to ensure the cleanliness of the surrounding environment during operation;

[0092] The setting of the storage chamber 28 ensures the consistency of the amount of glue delivered each time in the mechanism;

[0093] When the circular hole 27 is coaxial with the output tube 21, the glue can be discharged through the output tube 21 under the action of gravity and centrifugation, which reduces the difficulty of discharging the glue in the mechanism. At the same time, since the mechanism discharges the glue intermittently, the fluidity of the glue is increased. At this time, there will not be a large amount of residual glue at the output end of the output tube 21 for outputting the glue, and it will not adhere to nearby devices or operators.

[0094] The receiving chamber 28 cooperates with the pressure column 31. When the device moves too fast, the displacement of the pressure column 31 when it shrinks into the second circular hole 29 is large, which prevents the receiving chamber 28 from expanding excessively when storing glue and causing deformation of the turntable 26, thereby ensuring that the turntable 26 can safely rotate smoothly in the second pump housing 19. At the same time, it can prevent the connecting pipe 18 from being ruptured due to excessive pressure when the glue is output, thereby extending the service life of the device;

[0095] When the device completes the laying work, the pressure column 31 moves downward under the elastic force of the spring 30 and the gravity, so that the residual glue in the storage chamber 28 is discharged through the output pipe 21, thereby avoiding the residual glue in the mechanism;

[0096] At the same time, after the laying work is completed, the residual glue in the storage cavity 28 can be cleaned by injecting organic solvent through the output pipe 21, which increases the cleaning method and thoroughness of the device, and at the same time prevents the pressure column 31 from being adhered to the second circular hole 29.

[0097] Example 13: Reference Figure 1-Figure 7 The pump housing 11 is connected to the bottom of the lifting housing 32, the bottom wall of the lifting housing 32 is connected to the bottom end of the spring 2 33, the top of the spring 2 33 is connected to the bottom end of the heat sink 34, the heat sink 34 is slidably connected to the inner wall of the lifting housing 32, an expansion chamber 35 is formed between the bottom of the heat sink 34 and the inner wall of the lifting housing 32, the expansion chamber 35 is filled with hydraulic oil, and the top of the heat sink 34 passes through to the top of the top surface of the lifting housing 32.

[0098] The principle of the above scheme is:

[0099] After the mechanism has been working for a period of time, the temperature of the pump casing 11 will increase due to the rotation of the pump shaft 12 relative to the pump casing 11, the friction between the pump blades 13 and the glue, or the temperature increase of the external environment. When the temperature of the parts in the mechanism increases, the fluidity of the glue increases rapidly, which will increase the fluidity of the glue output to the permeable geotextile and cause the glue to flow out of the contact surface between the permeable geotextile and the bottom wall of the full-length intercepting ditch, thereby causing the two to fail to be smoothly bonded. Therefore, when the temperature of the pump casing 11 increases, the temperature of the hydraulic oil in the expansion chamber 35 increases and expands, the heat sink 34 slides outward along the lifting shell 32, the length of the spring 2 33 increases, and the area of ​​the heat sink 34 placed outside increases;

[0100] When the temperature of the pump housing 11 drops, the temperature of the hydraulic oil decreases and its volume shrinks. Under the elastic force of the spring 33 returning to its original position, the heat sink 34 slides toward the inside of the lifting housing 32 .

[0101] The beneficial effects of the above scheme are:

[0102] An expansion chamber 35 is provided in the mechanism. Hydraulic oil is filled in the expansion chamber 35 to absorb the heat of the pump housing 11. At the same time, the pump housing 11 is cooled by increasing the contact area between the heat sink 34 and the air, thereby avoiding the increase in the fluidity of the glue due to the high temperature when the device is working, and further improving the bonding effect between the permeable geotextile and the bottom wall of the full-length intercepting ditch.

[0103] The setting of the second spring 33 increases the stability of the heat sink 34 in the lifting shell 32. When the volume of the hydraulic oil changes, the length of the second spring 33 changes accordingly, and the heat sink 34 can be prevented from falling.

[0104] When the device is overheated, the area of ​​the heat sink 34 exposed to the air increases. When the device works in a low temperature environment, the area of ​​the heat sink 34 exposed to the air decreases. The change in the area of ​​the heat sink 34 exposed to the air greatly improves the device's ability to work in different environments.

[0105] Example 14: Reference Figure 1-Figure 7The end face of the pump housing 11 is connected to the end of the mounting tube 37, and the other end face of the pump housing 11 is arranged toward the pulley 3 22. The side wall of the other end of the mounting tube 37 is slidably connected to the inner wall of the end of the sleeve 38. The end of the sleeve 38 is connected to the end face of the pump housing 11 through a spring 39. The side of the heat dissipation plate 34 is connected to the end of the connecting rod 36, and the other end of the connecting rod 36 is connected to the end of the guide block 40. The top of the other end of the guide block 40 is provided with a chamfer 41. The sleeve 38 is connected to a mounting ring 42, and the end face of the mounting ring 42 is connected to the end of the guide ring 43. The other end of the guide ring 43 is arranged toward the end surface of the pump casing 11, and a chamfer 44 is arranged between the guide ring 43 and the mounting ring 42, and the chamfer 44 is frictionally matched with the chamfer 41. The inner wall of the second sleeve 45 is rotatably connected to the sleeve 38, and a plurality of fan blades 46 are connected to the side wall of the second sleeve 45. The inner wall of the other end of the second sleeve 45 away from the mounting ring 42 is connected to a gear ring 47, and the gear ring 47 is spaced apart from the gear 48. The gear 48 is arranged away from the other end of the second sleeve 45, and the gear 48 is connected to the other side wall of the pump shaft 12 outside the pump casing 11.

[0106] The principle of the above scheme is:

[0107] When the temperature of the device rises, the heat sink 34 moves away from the pump housing 11, so the connecting rod 36 moves synchronously and drives the guide block 40 to move. At this time, the chamfer 41 on the guide block 40 and the second chamfer 44 are frictionally matched, and the guide ring 43 and the mounting ring 42 move away from the pump housing 11. When the sleeve 38 moves away from the pump housing 11, the spring 39 is stretched. When the sleeve 38 drives the toothed ring 47 installed in the second sleeve 45 to mesh with the gear 48, due to the rotation of the pump shaft 12, the gear 48 drives the toothed ring 47 and the second sleeve 45 to rotate, thereby driving the fan blade 46 to rotate;

[0108] When the temperature of the device decreases, the heat sink 34 moves toward the pump housing 11, synchronously driving the connecting rod 36 and the chamfer 41 to move, and the chamfer 41 and the second chamfer 44 are frictionally matched in the opposite direction. Under the elastic force of the spring three 39 returning to the original position, the sleeve 38, the guide ring 43, the mounting ring 42, the second sleeve 45, the fan blades 46 and the gear ring 47 move toward the pump housing 11, and the gear ring 47 ends the meshing connection with the gear 48, and then the fan blades 46 stop rotating.

[0109] The beneficial effects of the above scheme are:

[0110] When the heat sink 34 extends to dissipate heat, the rotation of the fan blades 46 can increase the cooling speed of the heat sink 34 and dissipate heat from the pump housing 11, further increasing the heat dissipation speed in the mechanism, thereby reducing the fluidity of the glue flowing in the mechanism to its standard value;

[0111] The rotation of the fan blades 46 can also reduce the temperature generated by the relative friction between the pump shaft 12 and the pump housing 11, thereby avoiding excessive heat between the components of the device caused by friction, and avoiding deformation of the components caused by temperature increase;

[0112] The mechanism can control the blades 46 to rotate or stop rotating based on actual conditions, further improving the autonomous control capability of the device, while fully utilizing the power in the device, further reducing the setting of the power mechanism and reducing the cost of manufacturing the device;

[0113] The airflow generated by the rotation of the fan blades 46 can also cool the pulley 3 22 and the pulley 14;

[0114] Since the two are coaxially arranged and are respectively provided with the second belt 23 and the belt 15, the pump shaft 12 will generate a large amount of heat when the pulley mechanism and the belt mechanism rub against each other. The generation of airflow can reduce the temperature of the pulley 3 22, the pulley 14, the second belt 23 and the belt 15, which can not only cool the above four parts, but also cool the pump shaft 12, preventing any part from losing the transmission function between the parts due to excessive temperature, thereby improving the safety of the device during operation.

[0115] Since the device needs to work in different construction environments, when working at some special work sites, that is, construction sites with a lot of dust, the dust will cause jamming between the pulley mechanism and the belt mechanism. At this time, the airflow generated by the fan blades 46 can blow away the dust on the parts to prevent jamming between the parts.

[0116] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A method for reducing the moisture content of soil at the bottom of a runway trench, characterized in that: The following steps are involved: Based on the exploration data of the runway pre-excavation location, determine the location of the waterfront of the underground waterway; Based on the location of the waterfront of the underground waterway, a full-length intercepting ditch is excavated between the design edge line on each side of the runway and the waterfront of the underground waterway; Based on the location of the through-length intercepting ditch, multiple transverse intercepting ditches are dug at equal intervals below it; Based on the location of the transverse intercepting ditch, an open drainage ditch is excavated below it, and the transverse intercepting ditch is connected to the open drainage ditch using a HDPE pipe; After the transverse intercepting ditch is connected to the open drainage ditch using HDPE pipe, the runway trench is excavated, and a permeable geotextile is laid at the bottom of the full-length intercepting ditch using a laying device (1). The full-length intercepting ditch is then backfilled with mountain stones or crushed stones to form a permanent drainage blind ditch.

2. A method for reducing the moisture content of the soil at the bottom of a runway groove according to claim 1, characterized in that: When acquiring the exploration data, stratum samples are obtained through geological drilling.

3. A method for reducing the moisture content of the soil at the bottom of a runway groove according to claim 2, characterized in that: After obtaining the formation sample through geological drilling, the empirical value of the formation permeability coefficient is obtained by the constant pressure method, which is 0.01m / d.

4. A method for reducing the moisture content of the soil at the bottom of a runway groove according to claim 3, characterized in that: After obtaining the empirical value of the formation permeability coefficient of 0.01m / d through the constant pressure method, the groundwater level fluctuation is determined to be 1-2m based on the water level well detection method, and finally the water front position of the groundwater channel is determined to be 0.70-3.50m below the natural ground.

5. The method for reducing the moisture content of the soil at the bottom of the runway groove according to claim 1, characterized in that: Based on the position of the water front surface of the underground waterway, when a full-length intercepting ditch is excavated between the designed edge line on each side of the runway and the water front surface of the underground waterway, based on the water front surface position of the underground waterway being 0.70-3.50m below the natural ground, the distance between the designed full-length intercepting ditch and the designed edge line on one side of the runway is 10m.

6. The method for reducing the moisture content of the soil at the bottom of the runway groove according to claim 1, characterized in that: The distance between two adjacent transverse intercepting ditches is 100m.

7. The method for reducing the moisture content of the soil at the bottom of the runway groove according to claim 1, characterized in that: When the transverse intercepting ditch is connected to the open drainage ditch by using the HDPE pipe, a HDPE pipe with a diameter of 200 mm is used.

8. The method for reducing the moisture content of the soil at the bottom of the runway groove according to claim 1, characterized in that: The laying device (1) comprises: a mounting frame (2), one end of the bottom of the mounting frame (2) is rotatably connected to a guide wheel (3), the other end of the bottom of the mounting frame (2) is rotatably connected to a rotating shaft (17), the rotating shaft (17) is connected to a guide roller (4), the mounting frame (2) is rotatably connected to a storage roller (5), the mounting frame (2) is connected to a gluing mechanism (6), the output end of the gluing mechanism (6) is arranged toward the top of the guide roller (4), and the rotating shaft (17) is connected to the gluing mechanism (6) through a power mechanism (7).

9. The method for reducing the moisture content of the soil at the bottom of the runway groove according to claim 8, characterized in that: The glue coating mechanism (6) comprises: a glue storage tank (8), the top of the mounting frame (2) is connected to the glue storage tank (8), the bottom of the glue storage tank (8) is connected to the top of a glue outlet pipe (9), and the top of the glue storage tank (8) is connected to the bottom of a glue supply pipe (10).

10. A method for reducing the moisture content of the soil at the bottom of a runway groove according to claim 9, characterized in that: The glue coating mechanism (6) further comprises: a pump casing (11), the bottom end of the glue outlet pipe (9) being connected to one side of the pump casing (11), a pump shaft (12) being rotatably connected inside the pump casing (11), a plurality of pump blades (13) being connected to the pump shaft (12), the pump blades (13) being arranged inside the pump casing (11), a side wall of one end of the pump shaft (12) being arranged outside the pump casing (11) being connected to a pulley (14) in the power mechanism (7), the pulley (14) being transmission-connected to a second pulley (16) through a belt (15), the second pulley (16) being mounted on a rotating shaft (17), and the other side of the pump casing (11) being connected to a side portion of the second pump casing (19) through a connecting pipe (18).

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