A Frost Heave and Thaw Settlement Control System for Connecting Passages in Soft Soil Areas

Abstract

The present invention provides a frost heaving and thaw settlement control system for a connection passage in soft soil areas, further comprising: grouting pipe fittings; slurry discharge pipe fittings; heating tapes; a first digital pressure measuring valve fixedly installed on the grouting pipe fittings; a second digital pressure measuring valve fixedly installed on the slurry discharge pipe fittings; a grouting machine; a slurry pumping machine; and a controller. The heating tapes of the present invention are used as heat sources to ensure that the slurry will not freeze in the initial stage of low-flow grouting, which is beneficial to fully expand the bladder bag. The hot slurry is continuously injected and discharged, and the bladder bag always has a heating function to heat the soil layer. After heating for a certain period of time, the soil layer near the bladder bag is melted, and the bladder bag is inflated by injecting hot slurry, which is beneficial to extrude and fill the thaw-settled soil around the bladder bag for support, which is beneficial to reducing the degree of thaw settlement, and further beneficial to reducing the adverse impact of thaw settlement on the stability of the foundation near the passage.

Description

Technical Field

[0001] The invention belongs to the field of construction of connection channels, and particularly relates to a frost heaving and thaw settlement control system for connection channels in soft soil areas. Background Technique

[0002] The freezing method construction refers to drilling steel pipes into the water-containing soil layer first, introducing circulating liquid nitrogen, and freezing the surrounding soil layer to form a hard frozen soil shell. It can not only ensure the stability of the soil layer, but also play a role in water isolation, and can carry out excavation of deep foundation pits.

[0003] However, the freezing method construction will interfere with the temperature field of the surrounding soil layer, causing frost heaving and thaw settlement of the surrounding soil layer, and the freezing reinforcement of the soil body cannot work for a long time. When the temperature rises, the thawing makes the soil layer soften and produce thaw settlement, which has an adverse impact on the stability of the foundation. Summary of the Invention

[0004] In view of this, the present invention aims to provide a frost heaving and thaw settlement control system for connection channels in soft soil areas to solve the problems that the freezing method construction will interfere with the temperature field of the surrounding soil layer, causing frost heaving and thaw settlement of the surrounding soil layer, and the freezing reinforcement of the soil body cannot work for a long time. When the temperature rises, the thawing makes the soil layer soften and produce thaw settlement, which has an adverse impact on the stability of the foundation.

[0005] To achieve the above object, the technical solution of the present invention is realized as follows:

[0006] A frost heaving and thaw settlement control system for connection channels in soft soil areas provided by the present invention further includes: a grouting pipe fitting, the grouting pipe fitting penetrates through the support body and is fixedly communicated with the first end of the bladder; a slurry discharging pipe fitting, the slurry discharging pipe fitting penetrates through the support body and is fixedly communicated with the second end of the bladder; a heating belt, the heating belt passes through the grouting pipe fitting and extends into the interior of the bladder, and a metal elastic rod is fixedly connected to the surface of the heating belt; a first digital pressure measuring valve, the first digital pressure measuring valve is fixedly installed on the grouting pipe fitting; a second digital pressure measuring valve, the second digital pressure measuring valve is fixedly installed on the slurry discharging pipe fitting; a grouting machine, the grouting port of the grouting machine is communicated with the grouting pipe fitting through a first pipeline; a slurry pumping machine, the slurry inlet of the slurry pumping machine is communicated with the slurry discharging pipe fitting through a second pipeline; a controller, the controller is used to control the start and stop of the grouting machine and the slurry pumping machine according to the pressure measuring information of the first digital pressure measuring valve and the second digital pressure measuring valve.

[0007] Specifically, both ends of the first pipeline and the second pipeline are provided with flange connectors, and the flange connectors at both ends of the first pipeline and the second pipeline are respectively used to connect with the grouting pipe fitting and the slurry discharging pipe fitting.

[0008] It should be understood that the support body is arranged between the outer surface of the passage body and the soil layer. When on the surface of the passage body with an arc-shaped trajectory, the support body is distributed in an arc shape, and an arc-shaped bladder adapted thereto is supported on the surface;

[0009] Before grouting, first insert the heating tape into the grouting pipe fitting. Supported by the metal elastic rod, the heating tape can be inserted into the interior of the bladder. Under the restriction of the bladder, it deforms and moves from the first end of the bladder to the second end until the heating tape is inserted to the second end of the bladder, realizing the distribution of the heating tape within the extended trajectory of the bladder, which is beneficial to uniformly heating the interior of the bladder during heating;

[0010] After the heating tape is completely inserted into the bladder, the heating tape is electrified to heat the space inside the bladder, realizing the melting of the frozen soil layer around the bladder, making the nearby soil layer soft, and enabling the vicinity of the bladder to be heated for a certain period of time. After heating for a certain period of time, the frozen soil near the bladder melts. Specifically, the heating tape heats by providing heat, and the temperature is set within the range of 30 - 50 °C. First, heat for 1 to 2 hours to lower the temperature of the soil around the bladder. Then, inject slurry at 50 °C. The heating tape serves as a heat source to ensure that the slurry does not freeze at the initial stage of low-flow grouting, so that the bladder can expand fully;

[0011] Connect the grouting machine to the second grouting pipe through a pipeline, and connect the slurry pumping machine to the second drain pipe through a second pipeline. Then, inject the hot slurry from the first end of the bladder. After flowing through the entire interior of the bladder, it flows from the second end of the bladder into the first drain pipe and is partially pumped away by the slurry pumping machine through the second drain pipe, so that the slurry gradually accumulates in the bladder. The hot slurry in the bladder heats the bladder and then heats the surrounding soil layer. Continuously injecting and discharging the hot slurry always keeps the bladder with a heating function to heat the soil layer. After heating for a certain period of time, the soil layer near the bladder melts completely, and the bladder is inflated by injecting hot slurry, which is beneficial to squeezing and filling the soil with thaw settlement around the bladder for support, and is beneficial to reducing the degree of thaw settlement, and further beneficial to reducing the adverse impact of thaw settlement on the stability of the foundation near the passage.

[0012] It should be further noted that the inner diameters of the grouting pipe fittings and the slurry discharging pipe fittings are the same. The first digital pressure gauge valve and the second digital pressure gauge valve are respectively installed on the grouting pipe fittings and the slurry discharging pipe fittings to monitor the pressure change during the process of injecting hot slurry into the bladder bag in real time. After the hot slurry is injected, it will cause the surrounding soil to gradually melt. In the initial stage, the controller controls the grouting machine to start and injects hot slurry through the first connecting pipe. After a certain period of time, the temperature of the slurry drops. The pressure is measured at the second connecting pipe and the uncoagulated slurry is pumped out. At the same time, hot slurry is continuously injected from the first connecting pipe to ensure that the internal pressure of the pipes at the first connecting pipe and the second connecting pipe is kept consistent. Since the melting of the surrounding soil will cause settlement, multiple cycles are required to ensure a constant pressure, providing stable support to the melted soil layer after extrusion. Such operations are repeated until the bladder bag is fully inflated and expanded to the designed state, achieving further stable support for the soil layer near the channel, which is beneficial to reducing the adverse impact of thaw settlement on the stability of the foundation near the channel;

[0013] It should be further noted that when the bladder bag is not placed in the soil layer, hot slurry is injected into the bladder bag, and at the same time, slurry is pumped out through the slurry pump. When the pressure values a of the first digital pressure gauge valve and the second digital pressure gauge valve are constant and remain the same for a certain period of time, the inflated state of the bladder bag at this time is set as full inflation, and the control information one corresponding to the control states respectively maintained for the power of the slurry pump and the grouting machine is stored through the storage unit;

[0014] When the bladder bag is placed in the soil layer, the controller controls the power of the slurry pump and the grouting machine according to the control information one. When the pressure values b of the first digital pressure gauge valve and the second digital pressure gauge valve are constant and remain the same for a certain period of time, and the pressure value b is greater than the pressure value a, it indicates that the flow of the hot slurry in the bladder bag is stable and the pressure received from the soil layer is stable. The grouting power of the grouting machine and the slurry pump are controlled to shut down. Furthermore, the constant pressure values maintained by the first digital pressure gauge valve and the second digital pressure gauge valve can be used to evaluate the inflated state of the bladder bag. The first digital pressure gauge valve and the second digital pressure gauge valve are maintained at the constant pressure value b, which is beneficial to expanding the bladder bag to the maximum expansion degree under this condition.

[0015] It should be noted that the pressure value b is measured under the condition that the bladder bag is subjected to the soil layer pressure. Therefore, under the action of the soil layer pressure, it must be greater than the pressure value a.

[0016] It should be further noted that by placing the power connection of the heating belt inside the second grouting pipe, while providing a power supply channel, gas and hot slurry can be injected into the grouting pipe fittings.

[0017] Further, it further includes a flow splitting component and an inner flow splitting shell. The inner flow splitting shell is located inside the bladder. Both ends of the inner flow splitting shell are fixedly connected to the inner wall of the bladder. The top end of the grouting pipe fitting is fixedly communicated with a position of the inner flow splitting shell close to the first end. There is a gap between the inner flow splitting shell and the inner bottom surface of the bladder; a plurality of flow splitting pipes are respectively and fixedly communicated with both side surfaces of the inner flow splitting shell; wherein, the heating belt sequentially passes through the first grouting pipe and the second grouting pipe and then extends to a position close to the second end inside the inner flow splitting shell.

[0018] It should be understood that during the grouting process, the inner flow splitting shell can split the hot slurry into the flow splitting pipes, and the hot slurry is split into multiple positions inside the bladder through the flow splitting pipes, which is beneficial to grouting multiple positions inside the bladder, and thus realizes both uniform grouting and uniform heating, which is beneficial to uniformly heating the soil layer around the bladder, so that the soil layer around the bladder is melted when the bladder expands, and is beneficial to maintaining uniform expansion of the bladder surface.

[0019] It should be further noted that the heating of the heating belt will first heat the inside of the inner flow splitting shell, and the inner flow splitting shell will conduct heat through the flow splitting pipes, which is beneficial to uniformly transfer the heat to multiple positions inside the bladder, beneficial to increasing the heat conduction area, and beneficial to uniformly heating the inside of the bladder.

[0020] Further, it further includes a guiding component. The guiding component includes: a guiding track. The first slurry discharge pipe includes a direction-changing guiding section and an extending guiding section. The guiding track is fixedly connected to the inner top surface of the inner flow splitting shell; a guiding roller is rotatably connected to the end of the metal elastic rod, and has an annular fitting groove on its surface, and the annular fitting groove is adapted to the guiding track.

[0021] It should be understood that under the guidance of the guiding track, when the heating belt enters the inner flow splitting pipe, the annular fitting groove of the guiding roller will first cooperate with the direction-changing guiding section, causing the heating belt to bend and deform. Then, under the support of the metal elastic rod and the guidance of the guiding roller, it moves to the extending guiding section until the guiding roller moves near the second end of the bladder, realizing the guidance of the extension of the heating belt and moving along the extending direction of the bladder.

[0022] Furthermore, it also includes a hot air blower. A third pipe is connected to the air outlet of the hot air blower. The end of the third pipe is also connected with a flange connector, which is used to connect the third pipe to the grouting pipe fitting through the flange connector when needed. It should be understood that as shown in the figure, the hot air blower can be connected to the first grouting pipe through the flange connector, the end of the second slurry discharge pipe is blocked by a plug, air is blown into the bladder, and the hot air expands the bladder body, so that the bladder body can primarily extrude and stabilize the surrounding soft soil, leaving a certain space. Then, the third pipe of the hot air blower is separated from the grouting pipe fitting, which is beneficial to reducing the resistance during the initial grouting expansion for the later grouting of the bladder.

[0023] Compared with the prior art, the freeze-thaw heave control system for a connection passage in soft soil areas of the present invention has the following beneficial effects:

[0024] For the freeze-thaw heave control system for a connection passage in soft soil areas of the present invention, hot slurry is injected from the first end of the bladder. After flowing through the entire bladder internally, it flows to the first slurry discharge pipe from the second end of the bladder and is partially pumped away by a slurry pump through the second slurry discharge pipe, so that the bladder will gradually store slurry. The hot slurry in the bladder will heat the bladder, and then heat the surrounding soil layer. By continuously injecting and discharging the hot slurry, the bladder always has the heating function to heat the soil layer. After heating for a certain period of time, the soil layer near the bladder melts completely, and the bladder is inflated by injecting hot slurry, which is beneficial to extruding and filling the soil that has thawed and subsided around the bladder for support, and is beneficial to reducing the degree of thaw settlement, and further beneficial to reducing the adverse impact of thaw settlement on the stability of the foundation near the passage.

[0025] For the freeze-thaw heave control system for a connection passage in soft soil areas of the present invention, during the grouting process, the internal flow dividing shell can divide the hot slurry into the flow dividing pipes, and the hot slurry is divided into multiple positions inside the bladder through the flow dividing pipes, which is beneficial to grouting at multiple positions inside the bladder, and then maintaining the heat at multiple positions of the bladder. That is, it realizes uniform grouting and uniform heating, is beneficial to uniformly heating the soil layer around the bladder, so that the soil layer around the bladder melts when the bladder expands, and is beneficial to maintaining the uniform expansion of the bladder surface.

[0026] For the freeze-thaw heave control system for a connection passage in soft soil areas of the present invention, the heating belt is used as a heat source to ensure that the slurry will not freeze at the initial stage of low-flow grouting, which is beneficial to fully expanding the bladder. By placing the power connection of the heating belt in the second grouting pipe, while providing a power supply channel, heating gas can be injected into the grouting pipe fitting, and the hot gas expands the bladder body, so that the bladder body can primarily extrude and stabilize the surrounding soft soil, leaving a certain space, which is beneficial to reducing the resistance during the initial grouting for the later grouting of the bladder. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings, which form a part of the present invention, are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0028] Figure 1 It is a structural sectional view of a support body and a bladder bag of a frost heaving and thaw settlement control system for a connection passage in soft soil areas according to an embodiment of the present invention;

[0029] Figure 2 It is a first overall structural schematic diagram of a frost heaving and thaw settlement control system for a connection passage in soft soil areas according to an embodiment of the present invention;

[0030] Figure 3 It is a second overall structural schematic diagram of a frost heaving and thaw settlement control system for a connection passage in soft soil areas according to an embodiment of the present invention;

[0031] Figure 4 It is Figure 3 an enlarged view of part A in

[0032] Figure 5 It is Figure 3 an enlarged view of part B in

[0033] Figure 6 It is a first structural sectional view of a front view of a support body and a bladder bag of a frost heaving and thaw settlement control system for a connection passage in soft soil areas according to an embodiment of the present invention;

[0034] Figure 7 It is a second structural sectional view of a front view of a support body and a bladder bag of a frost heaving and thaw settlement control system for a connection passage in soft soil areas according to an embodiment of the present invention;

[0035] Figure 8 It is a structural sectional view of a front view of an internal flow dividing shell of a frost heaving and thaw settlement control system for a connection passage in soft soil areas according to an embodiment of the present invention;

[0036] Figure 9 It is a structural schematic diagram of a guiding track and a heating belt of a frost heaving and thaw settlement control system for a connection passage in soft soil areas according to an embodiment of the present invention;

[0037] Figure 10 It is Figure 9 an enlarged view of part C in

[0038] Figure 11 It is Figure 9 an enlarged view of part D in

[0039] Figure 12 It is a structural sectional view of a second grouting pipe of a frost heaving and thaw settlement control system for a connection passage in soft soil areas according to an embodiment of the present invention;

[0040] Figure 13 Schematic diagram of the connection ring and metal elastic rod of a frost heaving and thawing settlement control system for a connection tunnel in soft soil area according to an embodiment of the present invention;

[0041] Figure 14 Control module diagram of a frost heaving and thawing settlement control system for a connection tunnel in soft soil area according to an embodiment of the present invention.

[0042] Description of reference numerals:

[0043] 1 - Support body; 2 - Bladder; 3 - First grouting pipe; 4 - Second grouting pipe; 401 - First communication cavity; 402 - First communication pipe; 5 - First slurry discharge pipe; 6 - Second slurry discharge pipe; 601 - Second communication cavity; 602 - Second communication pipe; 7 - Heating belt; 8 - Metal elastic rod; 9 - Electrode; 10 - Controller; 11 - Conductive ring; 12 - Tunnel body 12; 13 - Inner flow - dividing shell; 14 - Flow - dividing pipe; 15 - Opening; 16 - Drainage through - hole; 17 - Guide track; 1701 - Direction - changing guide section; 1702 - Extension guide section; 18 - Guide roller; 19 - Annular mating groove; 20 - First digital pressure - measuring valve; 21 - Second digital pressure - measuring valve; 22 - Support frame; 23 - Connection ring; 24 - Grouting machine; 25 - Slurry pumping machine; 26 - Hot air blower; 27 - First end; 28 - Second end. Detailed implementation manners

[0044] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments may be combined with each other.

[0045] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise stated, the meaning of "a plurality" is two or more.

[0046] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] The following will refer to the appended Figures 1 to 14 and describe the present invention in detail in conjunction with embodiments.

[0048] As Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 、 Figure 9 、 Figure 10 、 Figure 11 、 Figure 12 、 Figure 13 and Figure 14 shown, a frost heaving and thawing settlement control system for a connection passage in soft soil area, comprising a support body 1 and a bladder 2, further comprising: a grouting pipe fitting, the grouting pipe fitting penetrates through the support body 1 and is fixedly communicated with the first end 27 of the bladder 2; a slurry discharging pipe fitting, the slurry discharging pipe fitting penetrates through the support body 1 and is fixedly communicated with the second end 28 of the bladder 2; a heating tape 7, the heating tape 7 passes through the grouting pipe fitting and extends into the interior of the bladder 2, and a metal elastic rod 8 is fixedly connected to the surface of the heating tape 7; a first digital pressure measuring valve 20, the first digital pressure measuring valve 20 is fixedly installed on the grouting pipe fitting; a second digital pressure measuring valve 21, the second digital pressure measuring valve 21 is fixedly installed on the slurry discharging pipe fitting; a grouting machine 24, the grouting port of the grouting machine 24 is communicated with the grouting pipe fitting through a first pipeline; a slurry pumping machine 25, the slurry inlet of the slurry pumping machine 25 is communicated with the slurry discharging pipe fitting through a second pipeline; a controller 10, the controller 10 is used to control the start and stop of the grouting machine 24 and the slurry pumping machine 25 according to the pressure measuring information of the first digital pressure measuring valve 20 and the second digital pressure measuring valve 21.

[0049] Specifically, both ends of the first pipeline and the second pipeline are provided with flange connectors, and the flange connectors at both ends of the first pipeline and the second pipeline are respectively used to connect with the grouting pipe fitting and the slurry discharging pipe fitting.

[0050] It should be understood that the support body 1 is arranged between the outer surface of the passage body 12 and the soil layer. When on the surface of the passage body 12 in an arc trajectory, the support body 1 is distributed in an arc shape, and an arc-shaped bladder 2 is supported on the surface;

[0051] Before grouting, first insert the heating tape 7 into the grouting pipe fitting. Supported by the metal elastic rod 8, the heating tape 7 can be inserted into the interior of the bladder 2. Restricted by the bladder 2, it deforms and moves from the first end 27 to the second end 28 of the bladder 2 until the heating tape 7 is inserted to the second end 28 of the bladder 2, realizing the distribution of the heating tape 7 within the extended trajectory of the bladder 2, which is beneficial to uniformly heating the interior of the bladder 2 during heating.

[0052] After the heating tape 7 is completely inserted into the bladder 2, the heating tape 7 is powered on to heat the space inside the bladder 2, melting the frozen soil layer around the bladder 2, softening the nearby soil layer, and enabling the vicinity of the bladder 2 to be heated for a certain period of time. After heating for a certain time, the frozen soil near the bladder 2 melts. Specifically, the heating tape 7 heats by providing heat, and the temperature is set within the range of 30 - 50 °C. First, heat for 1 to 2 hours to reduce the temperature of the soil around the bladder 2. Then, inject grout at 50 °C. The heating tape 7 serves as a heat source to ensure that the grout does not freeze during the initial stage of low-flow grouting, enabling the bladder 2 to expand fully.

[0053] As Figure 6 shown, connect the grouting machine 24 to the second grouting pipe 4 through a pipeline, and connect the slurry pumping machine 25 to the second drain pipe 6 through a second pipeline. Then, hot grout is injected from the first end 27 of the bladder 2. After flowing through the entire interior of the bladder 2, it flows into the first drain pipe 5 from the second end 28 of the bladder 2 and is partially pumped away by the slurry pumping machine 25 through the second drain pipe 6. As a result, slurry gradually accumulates inside the bladder 2. The hot grout inside the bladder 2 heats the bladder 2 and then heats the surrounding soil layer. By continuously injecting and discharging the hot grout, the heating function of the bladder 2 is always maintained to heat the soil layer. After heating for a certain time, the soil layer near the bladder 2 melts completely, and the bladder 2 is inflated by injecting hot grout, which is beneficial to squeezing and filling the soil that has subsided due to thawing around the bladder 2 for support, helping to reduce the degree of settlement and further reducing the adverse impact of settlement on the stability of the foundation near the passage.

[0054] It should be further noted that the inner diameters of the grouting pipe fittings and the slurry discharge pipe fittings are the same. The first digital pressure gauge valve 20 and the second digital pressure gauge valve 21 are respectively installed on the grouting pipe fittings and the slurry discharge pipe fittings to monitor the pressure change during the process of injecting hot slurry into the bladder 2 in real time. After the hot slurry is injected, it will cause the surrounding soil to gradually melt. In the initial stage, the controller 10 controls the grouting machine 24 to start and injects hot slurry through the first connecting pipe 402. After a certain period of time, the temperature of the slurry drops, and the pressure is measured at the second connecting pipe 602 and the uncoagulated slurry is pumped out. At the same time, hot slurry is continuously injected from the first connecting pipe 402 to ensure that the internal pressures at the first connecting pipe 402 and the second connecting pipe 602 are consistent. Since the melting of the surrounding soil will cause settlement, multiple cycles are required to ensure a constant pressure and provide stable support for the extruded melted soil layer. Such repeated operations are carried out until the bladder 2 is fully inflated and expanded to the designed state, realizing further stable support for the soil layer near the passage, which is beneficial to reducing the adverse impact of thaw settlement on the stability of the foundation near the passage;

[0055] It should be further noted that when the bladder 2 is not placed in the soil layer, hot slurry is injected into the bladder 2, and at the same time, the slurry is pumped out through the slurry pump 25. When the pressure values a of the first digital pressure gauge valve 20 and the second digital pressure gauge valve 21 are constant and remain the same for a certain period of time, the inflated state of the bladder 2 at this time is set as fully inflated, and the control information one corresponding to the control states respectively maintained by the power of the slurry pump 25 and the grouting machine 24 is stored through the storage unit;

[0056] When the bladder 2 is placed in the soil layer, the controller 10 controls the power of the slurry pump 25 and the grouting machine 24 according to the control information one. When the pressure values b of the first digital pressure gauge valve 20 and the second digital pressure gauge valve 21 are constant and remain the same for a certain period of time, and the pressure value b is greater than the pressure value a, it indicates that the flow of the hot slurry in the bladder 2 is stable and the pressure received from the soil layer is stable. The grouting power of the grouting machine 24 and the slurry pump 25 are controlled to close. Furthermore, the constant pressure values maintained by the first digital pressure gauge valve 20 and the second digital pressure gauge valve 21 can be used to evaluate the inflated state of the bladder 2. The first digital pressure gauge valve 20 and the second digital pressure gauge valve 21 are maintained at the constant pressure value b, which is beneficial to expanding the bladder 2 to the maximum expansion degree under this condition.

[0057] It should be noted that the pressure value b is measured under the condition that the bladder 2 is subjected to the soil layer pressure. Therefore, under the action of the soil layer pressure, it must be larger than the pressure value a.

[0058] It should be further noted that by placing the power connection of the heating belt 7 inside the second grouting pipe 4, while providing a power supply channel, gas and hot slurry can be injected into the grouting pipe fittings.

[0059] Such as Figure 6 、 Figure 7and Figure 8 As shown, it further includes a shunt assembly, an inner shunt housing 13. The inner shunt housing 13 is located inside the bladder 2, and both ends of the inner shunt housing 13 are fixedly connected to the inner wall of the bladder 2. The top end of the grouting pipe fitting is fixedly communicated with the position of the inner shunt housing 13 close to the first end 27. There is a gap between the inner shunt housing 13 and the inner bottom surface of the bladder 2; a plurality of shunt pipes 14 are respectively fixedly communicated on both side surfaces of the inner shunt housing 13; wherein, the heating belt 7 sequentially passes through the first grouting pipe 3 and the second grouting pipe 4 and then extends to a position close to the second end 28 inside the inner shunt housing 13.

[0060] It should be understood that during the grouting process, the inner shunt housing 13 can shunt the hot slurry into the shunt pipes 14, and through the shunt pipes 14, the hot slurry is shunted to multiple positions inside the bladder 2, which is beneficial to grouting at multiple positions inside the bladder 2, and thus realizes both uniform grouting and uniform heating, which is beneficial to uniformly heating the soil layer around the bladder 2, so that the soil layer around the bladder 2 is melted when the bladder 2 expands, and is beneficial to maintaining the uniform expansion of the surface of the bladder 2.

[0061] It should be further noted that the heating of the heating belt 7 will first heat the inside of the inner shunt housing 13, and the inner shunt housing 13 will conduct heat through the shunt pipes 14, which is beneficial to uniformly transfer the heat to multiple positions inside the bladder 2, beneficial to increasing the heat conduction area, and beneficial to uniformly heating the inside of the bladder 2.

[0062] As Figure 8 、 Figure 9 、 Figure 10 、 Figure 11 、 Figure 12 and Figure 13 As shown, it further includes a guiding assembly. The guiding assembly includes: a guiding track 17, the guiding track 17 includes a direction-changing guiding section 1701 and an extending guiding section 1702, and the guiding track 17 is fixedly connected to the inner top surface of the inner shunt housing 13; a guiding roller 18, the guiding roller 18 is rotatably connected to the end of the metal elastic rod 8, and has an annular fitting groove 19 on its surface, and the annular fitting groove 19 is adapted to the guiding track 17.

[0063] It should be understood that under the guidance of the guiding track 17, when the heating belt 7 enters the inner shunt pipe 14, the annular fitting groove 19 of the guiding roller 18 will first cooperate with the direction-changing guiding section 1701, causing the heating belt 7 to bend and deform, and then under the support of the metal elastic rod 8 and the guidance of the guiding roller 18, it moves to the extending guiding section 1702 until the guiding roller 18 moves near the second end 28 of the bladder 2, realizing the guidance of the extension of the heating belt 7 and moving along the extending direction of the bladder 2.

[0064] As Figure 7As shown, as an embodiment, it further includes a hot air blower 26. A third pipe is connected to the air outlet of the hot air blower 26. The end of the third pipe is also connected with a flange connector, which is used to connect the third pipe to the grouting fitting through the flange connector when needed. It should be understood that as Figure 7 shown, the hot air blower 26 can be connected to the first grouting pipe 3 through a flange connector. The end of the second slurry discharge pipe 6 is blocked by a plug, and air is blown into the bladder 2. The hot air expands the bladder body, so that the bladder body can initially extrude and stabilize the surrounding soft soil, leaving a certain space. Then, the third pipe of the hot air blower is separated from the grouting fitting, which is beneficial to reducing the resistance suffered during the initial grouting expansion of the bladder 2 in the later stage.

[0065] As Figure 1 、 Figure 6 and Figure 7 shown, a support frame 22 is also fixedly connected to the surface of the support body 1. The support frame 22 is formed by the intersecting arrangement of the first support rod and the second support rod. The support frame 22 surrounds the bladder 2 and maintains a gap with the bladder 2. It should be understood that by setting the support frame 22, it is beneficial to separate the soil layer near the bladder 2 to a certain extent, which is beneficial to reducing the extrusion force of the soil layer on the bladder 2 and reducing the difficulty of the later grouting expansion of the bladder 2.

[0066] As Figure 10 、 Figure 11 、 Figure 12 and Figure 13 shown, a connecting ring 23 is fixedly connected to the end of the metal elastic rod 8. The connecting ring 23 is sleeved in the annular mating groove 19 of the guide roller 18. By setting the connecting ring 23, the guide roller 18 is rotatably connected to the end of the metal elastic rod 8.

[0067] As Figure 1 shown, the end of the shunt pipe 14 has an opening 15, and drain through holes 16 are provided on the surface. It should be understood that by setting the opening 15 and the drain through holes 16, it is beneficial to evenly shunt the hot slurry flowing through the shunt pipe 14.

[0068] As Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 and Figure 8As shown in the figure, the grouting pipe fittings include a first grouting pipe 3 and a second grouting pipe 4. The first grouting pipe 3 and the second grouting pipe 4 are connected by a flange. The first grouting pipe 3 penetrates through the support body 1 and is fixedly communicated with the first end 27 of the bladder bag 2. The first digital pressure gauge valve 20 is fixedly installed on the second grouting pipe 4. The slurry discharge pipe fittings include a first slurry discharge pipe 5 and a second slurry discharge pipe 6. The second slurry discharge pipe 6 and the first slurry discharge pipe 5 are connected by a flange. The first slurry discharge pipe 5 penetrates through the support body 1 and is fixedly communicated with the second end 28 of the bladder bag 2. The second digital pressure gauge valve 21 is fixedly installed on the second slurry discharge pipe 6. It should be understood that by connecting with a flange, the first grouting pipe 3 and the second grouting pipe 4 can be disassembled, the heating tape 7 can be inserted from the pipe orifice of the second grouting pipe 4 until it is inserted into the bladder bag 2, and then the first grouting pipe 3 and the second grouting pipe 4 are connected by a flange again.

[0069] It should be further noted that by connecting the first grouting pipe 3 and the second grouting pipe 4 with a flange, and by connecting the second slurry discharge pipe 6 and the first slurry discharge pipe 5 with a flange, in order to make the second slurry discharge pipe 6 and the first slurry discharge pipe 5 separable, and the first grouting pipe 3 and the second grouting pipe 4 separable, so as to facilitate the removal of the second grouting pipe 4 and the second slurry discharge pipe 6 and separately install the first digital pressure gauge valve 20 and the second digital pressure gauge valve 21 respectively.

[0070] As Figure 10 and Figure 12 shown in the figure, it also includes a conductive end. The conductive end includes two electrodes 9. The two electrodes 9 are fixedly inserted into the second grouting pipe 4, and conductive rings 11 are sleeved on the surfaces of the two electrodes 9. The two conductive rings 11 are fixedly connected to the ends of the heating tape 7 and are electrically connected to the two power connection heads of the heating tape 7.

[0071] After the heating tape 7 is completely inserted into the bladder bag 2, the two conductive rings 11 are respectively sleeved on the two electrodes 9. The two electrodes 9 are the positive power connection electrode and the negative power connection electrode respectively. By connecting the two electrodes 9 to an external power supply, power is supplied, and the space inside the bladder bag 2 is heated. It realizes that the heating tape 7 can be powered on and heated by connecting electricity outside the grouting pipe fittings, preventing interference during grouting of the grouting pipe fittings, and after the first grouting pipe 3 and the second grouting pipe 4 are disassembled, it is convenient to disconnect the heating tape from the electrodes 9.

[0072] As Figure 10 and Figure 12As shown in the figure, the second grouting pipe 4 includes a first communication cavity 401 and a first communication pipe 402. The first communication cavity 401 is used to provide an accommodation space for two electrodes 9. The first digital pressure measuring valve 20 is fixedly installed on the first communication pipe 402. The second slurry discharge pipe 6 includes a second communication cavity 601 and a second communication pipe 602. The second digital pressure measuring valve 21 is fixedly installed on the second communication pipe 602. By providing the first communication pipe 402 and the second communication pipe 602, suitable pipe installation positions are provided for the first digital pressure measuring valve 20 and the second digital pressure measuring valve 21.

[0073] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A frost heave and thaw settlement control system for a communication channel in a soft soil area, comprising a support body (1) and a bladder bag (2), characterized in that: Also includes: A grouting pipe fitting, wherein the grouting pipe fitting passes through the support body (1) and is fixedly connected to the first end (27) of the bag (2); A slurry discharge pipe, wherein the slurry discharge pipe passes through the support body (1) and is fixedly connected to the second end (28) of the bag (2); A heating belt (7), the heating belt (7) extending into the interior of the bladder bag (2) after passing through the grouting pipe, a metal elastic rod (8) being fixedly connected to the surface of the heating belt (7); A first digital pressure measuring valve (20), the first digital pressure measuring valve (20) being fixedly mounted on the grouting pipe fitting; A second digital pressure measuring valve (21), wherein the second digital pressure measuring valve (21) is fixedly mounted on the slurry discharge pipe; A grouting machine (24), wherein a grouting port of the grouting machine (24) is connected to the grouting pipe member via a first pipe; A slurry extraction machine (25), wherein the slurry inlet of the slurry extraction machine (25) is connected to the slurry discharge pipe member via a second pipe; A controller (10), the controller (10) being used to control the start and stop of a grouting machine (24) and a grouting machine (25) according to pressure measurement information of a first digital pressure measuring valve (20) and a second digital pressure measuring valve (21); Also included is a flow diversion component, the flow diversion component comprising: An inner flow-dividing shell (13), the inner flow-dividing shell (13) being located inside the bladder bag (2), the two ends of the inner flow-dividing shell (13) being fixedly connected to the inner wall of the bladder bag (2), the top end of the grouting pipe being fixedly connected to the position of the inner flow-dividing shell (13) close to the first end (27), and a gap being provided between the inner flow-dividing shell (13) and the inner bottom surface of the bladder bag (2); Also included is a guide component, the guide component comprising: A guide track (17), the guide track (17) comprising a direction-changing guide section (1701) and an extended guide section (1702), the guide track (17) being fixedly connected to the inner top surface of the inner flow-dividing shell (13); A guide roller (18), the guide roller (18) is rotatably connected to the end of the metal elastic rod (8), and has an annular matching groove (19) on its surface, the annular matching groove (19) being adapted to the guide track (17).

2. A frost heave and thaw settlement control system for a communication channel in a soft soil area according to claim 1, characterized in that: The diversion component also includes: A plurality of flow dividing tubes (14), wherein the plurality of flow dividing tubes (14) are respectively fixedly connected to two side surfaces of the inner flow dividing shell (13); Wherein, the heating belt (7) passes through the grouting pipe and extends to a position inside the inner flow dividing shell (13) close to the second end (28).

3. A frost heave and thaw settlement control system for a communication channel in a soft soil area according to claim 2, characterized in that: It also comprises a hot air blower (26), wherein an air outlet of the hot air blower (26) is connected to a third pipeline.

4. A frost heave and thaw settlement control system for a communication channel in a soft soil area according to claim 3, characterized in that: A support frame (22) is also fixedly connected to the surface of the support body (1), the support frame (22) being formed by interlacing a first support rod and a second support rod, the support frame (22) surrounding the sac (2) and maintaining a gap between the support frame (2) and the sac (2).

5. A frost heave and thaw settlement control system for communication channels in soft soil areas according to claim 4, characterized in that: A connecting ring (23) is fixedly connected to the end of the metal elastic rod (8), and the connecting ring (23) is sleeved in the annular matching groove (19) of the guide roller (18).

6. A frost heave and thaw settlement control system for a communication channel in a soft soil area according to claim 5, characterized in that: The end of the flow dividing tube (14) has an opening (15), and a drainage hole (16) is provided on the surface.

7. A frost heave and thaw settlement control system for communication channels in soft soil areas according to claim 6, characterized in that: The grouting pipe fitting comprises a first grouting pipe (3) and a second grouting pipe (4), the first grouting pipe (3) and the second grouting pipe (4) being connected via a flange, the first grouting pipe (3) passing through the supporting body (1) and being fixedly connected to the first end (27) of the bladder bag (2), the first digital pressure measuring valve (20) being fixedly mounted on the second grouting pipe (4), the slurry discharge pipe fitting comprises a first slurry discharge pipe (5) and a second slurry discharge pipe (6), the second slurry discharge pipe (6) and the first slurry discharge pipe (5) being connected via a flange, the first slurry discharge pipe (5) passing through the supporting body (1) and being fixedly connected to the second end (28) of the bladder bag (2), the second digital pressure measuring valve (21) being fixedly mounted on the second slurry discharge pipe (6).

8. A frost heave and thaw settlement control system for communication channels in soft soil areas according to claim 7, characterized in that: It also comprises a conductive end, the conductive end comprising two electrodes (9), the two electrodes (9) being fixedly plugged into the second grouting pipe (4), and the surfaces of the two electrodes (9) being sleeved with a conductive ring (11), the two conductive rings (11) being fixedly connected to the ends of the heating belt (7), and being electrically connected to the two electrical terminals of the heating belt (7).

9. A frost heave and thaw settlement control system for communication channels in soft soil areas according to claim 8, characterized in that: The second grouting pipe (4) comprises a first connecting cavity (401) and a first connecting pipe (402), the first connecting cavity (401) being used to provide a storage space for two electrodes (9), the first digital pressure measuring valve (20) being fixedly mounted on the first connecting pipe (402), the second slurry discharge pipe (6) comprising a second connecting cavity (601) and a second connecting pipe (602), the second digital pressure measuring valve (21) being fixedly mounted on the second connecting pipe (602).

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