CN113833015B - Anti-liquefaction and anti-floating underground comprehensive pipe gallery structure and application method thereof - Google Patents

Abstract

The invention relates to a liquefaction-resistant and anti-floating underground integrated pipe gallery structure and an application method thereof, belonging to the technical field of integrated pipe gallery. The anti-liquefaction and anti-floating underground integrated pipe gallery structure includes a square tubular integrated pipe gallery body, a filter water absorption mechanism, a cooling mechanism and an air jet mechanism. The upper surface of the integrated pipe gallery body is embedded with a pore pressure sensor, and the filter water absorption mechanism is arranged in the integrated pipe gallery. On the side wall of the pipe gallery body, the cooling mechanism is arranged on the side wall of the integrated pipe gallery body, and the air jet mechanism is arranged on the top of the integrated pipe gallery body. In the liquefaction-resistant and anti-floating underground integrated pipe gallery structure of the present invention, the pore pressure sensor can quickly detect the change of the water content of the surrounding soil during an earthquake. It can reduce the water content of the soil and consolidate the surrounding sand, reducing the conditions for the liquefaction of the soil, thereby preventing the floating of the integrated pipe gallery.

Description

An underground integrated pipe gallery structure with anti-liquefaction and anti-floating and application method thereof

technical field

The invention relates to a liquefaction-resistant and anti-floating underground integrated pipe gallery structure and an application method thereof, belonging to the technical field of integrated pipe gallery.

Background technique

The underground comprehensive pipe gallery integrates various municipal engineering pipelines such as electricity, communication, gas, heating, water supply and drainage, and has special inspection ports, hoisting ports and monitoring systems. It is an important infrastructure to ensure urban operation and "" aorta". The underground integrated pipe gallery system not only solves the problem of urban traffic congestion, but also greatly facilitates the maintenance and repair of municipal facilities such as electricity, communication, gas, water supply and drainage, and avoids the frequent digging of roads due to laying and repairing underground pipelines. Influence and interference, reduce the cost of repeated pavement renovations and maintenance costs of engineering pipelines, maintain the integrity of the pavement and the durability of various pipelines, and facilitate the laying, increase or decrease, maintenance and daily management of various pipelines.

The length of the underground comprehensive pipe gallery is long, and it often passes through the saturated sand layer. Under the action of earthquake load, the saturated sandy soil layer is prone to liquefaction, which leads to the floating of the integrated pipe gallery and causes serious economic and property losses. The traditional anti-liquefaction treatment methods are not completely suitable for the long and narrow underground pipe gallery. Although researchers have studied many methods and measures to prevent soil liquefaction and the anti-floating of the integrated pipe gallery, they are rarely used in practical engineering and lack a comprehensive method. A comprehensive pipe gallery structure that can be more suitable for liquefiable soil.

Based on the conventional underground integrated pipe gallery, it is impossible to achieve autonomous anti-liquefaction and anti-floating. Therefore, it is necessary to develop a liquefaction-resistant and anti-floating underground integrated pipe gallery structure to meet the safety needs of the underground integrated pipe gallery.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to propose a liquefaction-resistant and anti-floating underground integrated pipe gallery structure and an application method for the deficiencies of the prior art.

The technical solution proposed by the present invention to solve the above technical problems is: an underground integrated pipe gallery structure with anti-liquefaction and anti-floating, including a square tubular integrated pipe gallery body, a filtering water absorption mechanism, a cooling mechanism and an air jet mechanism. A pore pressure sensor is embedded on the upper surface, the filter water absorption mechanism is arranged on the side wall of the integrated pipe gallery body to remove the pore water in the surrounding soil, and the cooling mechanism is arranged on the side wall of the integrated pipe gallery body to remove the surrounding soil from the surrounding soil. The water freezes into ice, and the jet mechanism is set on the top of the integrated pipe gallery body to jet low-temperature, high-pressure water-insoluble gas.

The improvement of the above technical scheme is: the upper end of the integrated pipe gallery body is symmetrically extended with flying wing-shaped outstretching flanges on both sides, which is used to increase the anti-buoyancy of the pipe gallery.

The improvement of the above technical solution is that flat anti-floating wing plates are symmetrically arranged on both sides of the lower end of the integrated pipe gallery body.

The improvement of the above technical scheme is: the filter water suction mechanism includes a filter suction pump and a drainage pipe, the filter suction pump is arranged on the outer surfaces of the side walls at both ends of the integrated pipe gallery body in the width direction, and the filter suction pumps are arranged evenly spaced along the length direction of the integrated pipe gallery body, Drainage pipes are embedded in the side walls of both ends of the integrated pipe gallery body in the width direction, and the filter suction pump is connected with the drainage pipes. A drainage ditch is opened on the bottom surface of the integrated pipe gallery body near the drainage pipe, and the drainage ditch is arranged along the length of the integrated pipe gallery body. .

The improvement of the above technical scheme is: the cooling mechanism includes a liquid nitrogen storage device and a liquid nitrogen circulation pipe, the liquid nitrogen circulation pipe is embedded in the outer surfaces of the side walls at both ends of the integrated pipe gallery body in the width direction, and the length direction of the liquid nitrogen circulation pipe is the same as that of the integrated pipe. The length direction of the gallery body is arranged in parallel, and the liquid nitrogen storage device is connected with the liquid nitrogen circulation pipeline to form a loop.

The improvement of the above technical solution is: the air injection mechanism includes a compressed gas pipeline and a gas compression device, the upper surface of the integrated pipe gallery body is evenly spaced with low-temperature compressed gas injection holes, the compressed gas pipeline is embedded in the upper end of the integrated pipe gallery body, and the gas compression device is installed. It is communicated with the compressed gas pipeline, and the compressed gas pipeline is communicated with the low-temperature compressed gas injection holes respectively.

The improvement of the above technical solution is: the inner side wall of the integrated pipe gallery body is provided with an air temperature, humidity and light sensor, and the inner top surface of the integrated pipe gallery body is provided with a high-pressure water mist fire extinguishing system.

The improvement of the above technical solution is that the pore pressure sensor is wrapped with a protective shell, and the interior of the integrated pipe gallery body is vertically separated with an intermediate partition wall.

The application method of the anti-liquefaction and anti-floating underground integrated pipe gallery structure of the present invention comprises the following steps:

(1) Measure the excess static pore water pressure of the soil around the body of the integrated pipe gallery through the pore pressure sensor. If the excess static pore water pressure reaches the threshold, the threshold is set to γ′×h(kPa), where h and γ′ are the pipe gallery respectively The buried depth of the top (unit m) and the floating weight of the overlying soil (unit kN/m3), then turn on the filter suction pump on the side wall of the integrated pipe gallery body to remove the excess static pore water pressure of the surrounding soil, and the surrounding soil Pore water is sucked into the drainage pipe and discharged into the drainage ditch inside the integrated pipe gallery;

(2) Turn on the filter suction pump and turn on the gas compression device. The gas compression device sprays the low-temperature and high-pressure insoluble gas into the soil outside the integrated pipe gallery body through the low-temperature compressed gas injection holes, so as to reduce the saturation of the soil around the pipe gallery. To achieve the purpose of reducing the liquefaction potential of the nearby soil;

(iii) In the process of excluding the pore water of the surrounding soil, when the excess pore water pressure value of the surrounding soil body measured by the pore pressure sensor drops to the same value as the pore water pressure value before the earthquake, it is determined that the excess pore water pressure is completely dissipated, To eliminate the danger of soil liquefaction, close the filter suction pump and gas compression device;

(iv) During the process of excluding the pore water of the surrounding soil, the pore pressure sensor measured the excess static pore water pressure of the surrounding soil continued to increase, and it was determined that the excess static pore water pressure generated by the vibration could not be eliminated by the filter suction pump alone. When the liquid nitrogen storage device is turned on, the liquid nitrogen is circulated along the liquid nitrogen circulation pipeline, and the water in the surrounding soil is frozen into ice to achieve the purpose of resisting liquefaction;

(5) Considering that the earthquake may cause fire inside the pipe gallery, the air temperature and humidity light sensor is used to monitor the temperature and humidity inside the integrated pipe gallery body in real time. Water mist fire extinguishing system, high pressure water mist fire extinguishing system is turned on to extinguish the fire.

The improvement of the above technical scheme is: in step (v), the air temperature, humidity and light sensor determines that a fire has occurred. There are two kinds of temperature rise type temperature alarms and temperature difference type temperature alarms, and satisfying any one of the conditions is to determine that a fire occurs, specifically:

A. Temperature-rising temperature alarm: when the ambient temperature rises to 60-85°C at a rate of 0.5°C per minute, it is determined that a fire has occurred, and the air temperature and humidity light sensor will issue an alarm in time;

B. Temperature difference temperature alarm: It means that when the ambient temperature rises to a difference of 22°C from the original ambient temperature within one minute, it is determined that a fire has occurred, and the air temperature, humidity and light sensor will issue an alarm in time.

The present invention adopts the beneficial effects of the above technical solutions as follows:

(1) When the liquefaction-resistant and anti-floating underground integrated pipe gallery structure of the present invention is in an earthquake, the pore pressure sensor can quickly detect the change of the moisture content of the surrounding soil. If the soil is about to liquefy, the surrounding soil can be extracted by the filter suction pump. It can reduce the excess static pore water pressure of the soil and reduce the conditions for the liquefaction of the soil, thereby preventing the floating of the integrated pipe gallery. The self-weight of the pipe gallery body further prevents the floating of the integrated pipe gallery;

(2) In the liquefaction-resistant and anti-floating underground integrated pipe gallery structure of the present invention, the low-temperature compressed gas jet holes can be injected into the soil outside the integrated pipe gallery body while the filter suction pump of the integrated pipe gallery body extracts the pore water of the surrounding soil. The low-temperature and high-pressure water-insoluble gas is injected to reduce the saturation of the soil body and achieve the purpose of reducing the liquefaction potential of the nearby soil body. So as to prevent the floating of the integrated pipe gallery;

(3) In the liquefaction-resistant and anti-floating underground integrated pipe gallery structure of the present invention, when the surrounding soil pore water cannot be removed by the filter suction pump, the liquid nitrogen storage device is opened to circulate the liquid nitrogen along the liquid nitrogen circulation pipeline, and the integrated The water in the soil around the pipe gallery freezes into ice, and the surrounding sand is consolidated to prevent sand liquefaction, thereby preventing the floating of the integrated pipe gallery;

(4) In the liquefaction-resistant and anti-floating underground integrated pipe gallery structure of the present invention, the overhanging flanges and the anti-floating wing plate structure increase the soil mass on the upper part of the integrated pipe gallery body by increasing the area of the soil body on the integrated pipe gallery body. pressure, which improves the anti-floating ability of the integrated pipe gallery body;

(5) In the anti-liquefaction and anti-floating underground integrated pipe gallery structure of the present invention, the air temperature and humidity light sensor can monitor the temperature and humidity inside the integrated pipe gallery body in real time, and when a fire occurs inside the integrated pipe gallery body, it can transmit a signal to open the The high-pressure water mist fire extinguishing system in the integrated pipe gallery body can effectively prevent the occurrence of fire inside the pipe gallery under the action of earthquakes, and meet the safety needs of the underground integrated pipe gallery.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings:

Fig. 1 is the structural schematic diagram of the underground integrated pipe gallery structure of anti-liquefaction and anti-floating according to the embodiment of the present invention;

Fig. 2 is the top-view structural schematic diagram of the underground integrated pipe gallery structure with anti-liquefaction and anti-floating according to the embodiment of the present invention;

3 is a schematic front view of the structure of the underground integrated pipe gallery with anti-liquefaction and anti-floating according to an embodiment of the present invention;

4 is a schematic structural diagram of a jet mechanism of an underground integrated pipe gallery structure with anti-liquefaction and anti-floating according to an embodiment of the present invention;

5 is a schematic structural diagram of the cooling mechanism of the underground integrated pipe gallery structure with anti-liquefaction and anti-floating according to an embodiment of the present invention;

Among them: 1. Outrigger flange; 2. Pore pressure sensor; 3. Protective shell; 4. Low temperature compressed gas injection hole; 5. Filter suction pump; 6. Drainage pipe; 7. Air temperature and humidity light sensor; 8. Drainage 9. Compressed gas pipeline; 10. High pressure water mist fire extinguishing system; 11. Intermediate partition wall; 12. Anti-floating wing plate; 13. Gas compression device; 14. Liquid nitrogen circulation pipeline; 15. Liquid nitrogen storage device.

Detailed ways

Example

The liquefaction-resistant and anti-floating underground integrated pipe gallery structure of this embodiment, as shown in Figures 1-5, includes a square tubular integrated pipe gallery body, a filter water absorption mechanism, a cooling mechanism and an air jet mechanism. The upper surface of the integrated pipe gallery body is embedded Pore pressure sensor 2 is provided, the filter water absorption mechanism is arranged on the side wall of the integrated pipe gallery body to remove pore water in the surrounding soil, and the cooling mechanism is arranged on the side wall of the integrated pipe gallery body to freeze the moisture in the surrounding soil. To form ice, the jet mechanism is arranged on the top of the integrated pipe gallery body to jet low-temperature, high-pressure water-insoluble gas. The pore pressure sensor 2 is wrapped with a protective shell 3, and the interior of the integrated pipe gallery body is vertically separated with an intermediate partition wall 11.

In the liquefaction-resistant and anti-floating underground integrated pipe gallery structure of the present embodiment, as shown in FIG. 1 , two sides of the upper end of the integrated pipe gallery body are symmetrically extended with flying wing-like overhanging flanges 1 to increase the anti-buoyancy of the pipe gallery. Flat anti-floating wing plates 12 are symmetrically arranged on both sides of the lower end of the integrated pipe gallery body.

In the liquefaction-resistant and anti-floating underground integrated pipe gallery structure of the present embodiment, the filtration water suction mechanism includes a filter suction pump 5 and a drainage pipe 6. The filter suction pump 5 is arranged on the outer surfaces of the side walls at both ends of the integrated pipe gallery body in the width direction. The water pumps 5 are evenly spaced along the length direction of the integrated pipe gallery body, the drainage pipes 6 are embedded in the side walls of both ends of the integrated pipe gallery body in the width direction, the filter suction pump 5 is connected with the drainage pipes 6, and the inner bottom surface of the integrated pipe gallery body is close to the drainage. A drainage ditch 8 is opened at the pipe 5, and the drainage ditch 8 is arranged along the length of the integrated pipe gallery body. The cooling mechanism includes a liquid nitrogen storage device 15 and a liquid nitrogen circulation pipe 14. The liquid nitrogen circulation pipe 14 is embedded in the outer surfaces of the side walls at both ends of the integrated pipe gallery body in the width direction. The length directions are arranged in parallel, and the liquid nitrogen storage device 15 is communicated with the liquid nitrogen circulation pipeline 14 to form a loop. The air injection mechanism includes a compressed gas pipeline 9 and a gas compression device 13. The upper surface of the integrated pipe gallery body is evenly spaced with low-temperature compressed gas injection holes 4. The compressed gas pipeline 9 is embedded in the upper end of the integrated pipe gallery body. The gas pipelines 9 are arranged in communication, and the compressed gas pipelines 9 are respectively arranged in communication with the low-temperature compressed gas injection holes 4 .

In the liquefaction-resistant and anti-floating underground integrated pipe gallery structure of the present embodiment, the inner side wall of the integrated pipe gallery body is provided with an air temperature, humidity and light sensor 7, and the inner top surface of the integrated pipe gallery body is provided with a high-pressure water mist fire extinguishing system 10. .

The application method of the underground comprehensive pipe gallery structure of the present embodiment includes the following steps:

(1) Measure the excess static pore water pressure of the soil around the body of the integrated pipe gallery through the pore pressure sensor 2. If the excess static pore water pressure reaches the threshold, the threshold is set to γ′×h(kPa), where h and γ′ are the pipe If the buried depth at the top of the gallery is in m and the floating weight of the overlying soil is in kN/m3, then the filter suction pump 5 on the side wall of the integrated pipe gallery is turned on to remove the excess static pore water pressure of the surrounding soil and the pore water in the surrounding soil. It is sucked into the drainage pipe 6 and discharged into the drainage ditch 8 inside the integrated pipe gallery, which reduces the excess static pore water pressure of the external soil and increases the self-weight of the integrated pipe gallery body to prevent the pipe gallery from floating;

(2) Turn on the gas compressing device 13 when the filter suction pump 5 is turned on, and the gas compressing device 13 sprays the low-temperature and high-pressure water-insoluble gas into the soil outside the integrated pipe gallery body through the low-temperature compressed gas jet hole 4 to reduce the amount of soil around the pipe gallery. The saturation of the nearby soil can be reduced to achieve the purpose of reducing the liquefaction potential of the nearby soil;

(iii) In the process of excluding the pore water of the surrounding soil, when the pore pressure sensor 2 measures and obtains that the pore water pressure of the surrounding soil drops to the same value as the pore water pressure before the earthquake, it is determined that the excess static pore water pressure is completely dissipated, and the soil To eliminate the danger of body liquefaction, close the filter suction pump 5 and the gas compression device 13;

(iv) During the process of excluding the pore water of the surrounding soil, the pore pressure sensor 2 measures that the excess static pore water pressure of the surrounding soil continues to increase, and it is determined that the excess static pore water pressure generated by vibration cannot be excluded by the filter suction pump 5 alone. , at this time, open the liquid nitrogen storage device 15, make the liquid nitrogen circulate along the liquid nitrogen circulation pipeline 14, freeze the water in the surrounding soil into ice, and consolidate the surrounding sand to achieve the purpose of resisting liquefaction; because the earthquake time is relatively short Therefore, as long as the excess static pore water pressure of the soil is still increasing during the drainage process, it can be directly determined that the drainage cannot avoid the liquefaction of the soil;

(v) Considering that the earthquake may cause fire inside the pipe gallery, therefore, the air temperature and humidity light sensor 7 is used to monitor the temperature and humidity inside the integrated pipe gallery body in real time. High pressure water mist fire extinguishing system 10, the high pressure water mist fire extinguishing system 10 is turned on to extinguish fire. Among them, the air temperature, humidity and light sensor 7 determines that a fire occurs by two methods: a temperature rise type temperature alarm and a temperature difference type temperature alarm, and if any one of the conditions is met, it is determined that a fire occurs, specifically:

A. Temperature rising temperature alarm: it means that when the ambient temperature rises to 60°C-85°C at a rate of 0.5°C per minute, it is determined that a fire has occurred, and the air temperature, humidity and light sensor 7 will issue an alarm in time;

B. Temperature difference temperature alarm: It means that when the ambient temperature rises to a difference of 22°C from the original ambient temperature within one minute, it is determined that a fire has occurred, and the air temperature and humidity light sensor 7 will issue an alarm in time, that is, when an alarm occurs, the temperature suddenly The rise should be promptly alarmed.

In the liquefaction-resistant and anti-floating underground integrated pipe gallery structure of this embodiment, the pore pressure sensor can quickly detect the change of the moisture content of the surrounding soil during an earthquake. Pore water can reduce the moisture content of the soil and reduce the conditions for the liquefaction of the soil, thereby preventing the floating of the integrated pipe gallery. At the same time, the pore water extracted by the filter suction pump is discharged into the drainage ditch, which increases the self-weight of the integrated pipe gallery. , which further prevents the floating of the integrated pipe gallery; the low-temperature compressed gas jet holes can spray low-temperature, high-pressure water-insoluble gas into the soil outside the integrated pipe gallery body while the filter suction pump of the integrated pipe gallery body extracts the pore water of the surrounding soil. , reduce the water content of the soil, and further prevent the liquefaction of the soil, thereby preventing the floating of the integrated pipe gallery.

In the liquefaction-resistant and anti-floating underground integrated pipe gallery structure of this embodiment, when the pore water in the surrounding soil cannot be removed by the filter suction pump, the liquid nitrogen storage device is turned on to circulate the liquid nitrogen along the liquid nitrogen circulation pipeline, and the integrated pipe gallery is The water in the surrounding soil freezes into ice, and the surrounding sand is consolidated to prevent the liquefaction of the sand, thereby preventing the floating of the integrated pipe gallery; the overhanging flange and the anti-floating wing plate structure increase the area of the integrated pipe gallery body to carry the soil. , increase the weight of the soil on the upper part of the integrated pipe gallery body, and further improve the anti-floating capacity of the integrated pipe gallery body.

In the liquefaction-resistant and anti-floating underground integrated pipe gallery structure of this embodiment, the air temperature and humidity light sensor can monitor the temperature and humidity inside the integrated pipe gallery body in real time. When a fire occurs inside the integrated pipe gallery body, it can transmit a signal to open the integrated pipe gallery The high-pressure water mist fire-extinguishing system 10 in the corridor body can effectively prevent the occurrence of fire inside the pipe corridor under the action of earthquake, and meet the safety requirements of the underground comprehensive pipe corridor.

In the liquefaction-resistant and anti-floating underground integrated pipe gallery structure of this embodiment, the gas compression device 13 can use an air compressor, and the liquid nitrogen storage device 15 can be installed with a liquid circulation pump to realize the circulating flow of liquid nitrogen along the liquid nitrogen circulation pipeline 14 . The high-pressure water mist fire-extinguishing system 10 may adopt the existing high-pressure water mist fire-extinguishing system. The air temperature, humidity and light sensor 7 can be a sensor that is susceptible to the Internet of Things. The specific model is: ISS-0121 air temperature and humidity light sensor, with a working voltage of 12V and a working current of 0.5A.

The present invention is not limited to the above-described embodiments. All technical solutions formed by equivalent replacements fall within the protection scope of the present invention.

Claims (7)

1. The utility model provides an anti liquefaction prevents utility tunnel structure of come-up which characterized in that: the device comprises a square tubular comprehensive pipe gallery body, a filtering water absorption mechanism, a cooling mechanism and an air injection mechanism, wherein a pore pressure sensor (2) is embedded in the upper surface of the comprehensive pipe gallery body, the filtering water absorption mechanism is arranged on the side wall of the comprehensive pipe gallery body and used for removing pore water of a surrounding soil body, the cooling mechanism is arranged on the side wall of the comprehensive pipe gallery body and used for freezing moisture in the surrounding soil body into ice, and the air injection mechanism is arranged at the top of the comprehensive pipe gallery body and used for injecting low-temperature high-pressure water-insoluble gas;

the filtering and water absorbing mechanism comprises a filtering and water absorbing pump (5) and a drainage pipeline (6), the filtering and water absorbing pump (5) is arranged on the outer surfaces of the side walls of the two ends of the comprehensive pipe rack body in the width direction, the filtering and water absorbing pump (5) is arranged along the length direction of the comprehensive pipe rack body at even intervals, the drainage pipeline (6) is embedded in the side walls of the two ends of the comprehensive pipe rack body in the width direction, the filtering and water absorbing pump (5) is communicated with the drainage pipeline (6), a drainage ditch (8) is formed in the position, close to the drainage pipeline (6), of the bottom surface inside the comprehensive pipe rack body, and the drainage ditch (8) is arranged along the length direction of the comprehensive pipe rack body;

the cooling mechanism comprises a liquid nitrogen storage device (15) and a liquid nitrogen circulating pipeline (14), the liquid nitrogen circulating pipeline (14) is embedded in the outer surfaces of the side walls of the two ends of the comprehensive pipe rack body in the width direction, the length direction of the liquid nitrogen circulating pipeline (14) is parallel to the length direction of the comprehensive pipe rack body, and the liquid nitrogen storage device (15) is communicated with the liquid nitrogen circulating pipeline (14) to form a loop;

jet-propelled mechanism includes compressed gas pipeline (9) and gas compression device (13), the upper surface of utility tunnel body evenly separates to be equipped with low temperature compressed gas fumarole (4), compressed gas pipeline (9) inlay and establish utility tunnel body upper end, gas compression device (13) with compressed gas pipeline (9) intercommunication sets up, compressed gas pipeline (9) respectively with low temperature compressed gas fumarole (4) intercommunication sets up.

2. The anti-liquefaction and anti-floating underground utility tunnel structure according to claim 1, characterized in that: the utility tunnel body upper end bilateral symmetry outwards extends has winged overhanging flange (1).

3. The anti-liquefaction and anti-floating underground utility tunnel structure according to claim 1, characterized in that: the utility tunnel body lower extreme bilateral symmetry is provided with flat anti strake board (12) that floats.

4. The anti-liquefaction and anti-floating underground utility tunnel structure according to claim 1, characterized in that: the utility tunnel comprises a comprehensive pipe rack body, the inside lateral wall of utility tunnel body is provided with air humiture light sensor (7), the inside top surface of utility tunnel body is provided with high-pressure water mist fire extinguishing system (10).

5. The anti-liquefaction and anti-floating underground utility tunnel structure according to claim 1, characterized in that: sensor (2) parcel has protective housing (3) hole pressure, the vertical partition wall (11) that separate in inside of utility tunnel body.

6. The method of using the anti-liquefaction and anti-floating underground utility tunnel structure according to any one of claims 1-5, wherein: the method comprises the following steps:

(1) the hyperstatic pore water pressure of the soil body around the comprehensive pipe gallery body is measured through the pore pressure sensor (2), and if the hyperstatic pore water pressure reaches a threshold value, the threshold value is set to be gamma^′X h (kPa), wherein h and γ^′The buried depth (unit m) and the floating weight (unit kN/m) of the overlying soil body at the top of the pipe gallery³) Then, a filtering water suction pump (5) on the side wall of the comprehensive pipe rack body is started to remove the ultra-static pore water pressure of the surrounding soil body, and the pore water in the surrounding soil body is sucked into a drainage pipeline (6) and drained into a drainage ditch (8) in the comprehensive pipe rack;

(2) the filtering water suction pump (5) is started, and the gas compression device (13) is started at the same time, so that the gas compression device (13) sprays low-temperature high-pressure water-insoluble gas into soil outside the comprehensive pipe gallery body through the low-temperature compressed gas jet holes (4);

(3) when the pore pressure sensor (2) measures that the pore water pressure value of the surrounding soil body is reduced to be consistent with the pore water pressure value before the earthquake in the process of removing the pore water of the surrounding soil body, the hyperstatic pore water pressure is judged to be completely dissipated, the soil body liquefaction danger is removed, and the filtering water suction pump (5) and the gas compression device (13) are closed;

(4) in the process of removing the pore water of the surrounding soil body, the pore pressure sensor (2) measures to obtain that the hyperstatic pore water pressure of the surrounding soil body is still continuously increased, and the hyperstatic pore water pressure generated by vibration cannot be removed by the filtering water suction pump (5) alone, at the moment, a liquid nitrogen storage device (15) is started to enable liquid nitrogen to circularly flow along a liquid nitrogen circulating pipeline (14), and the water in the surrounding soil body is frozen into ice;

(5) consider that the earthquake probably leads to the inside conflagration that breaks out of pipe rack, consequently, adopt air temperature and humidity light sensor (7) real-time supervision utility tunnel body inside humiture, when the inside conflagration that breaks out of utility tunnel body, air temperature and humidity light sensor (7) transmission signal gives high-pressure water mist fire extinguishing systems (10), and high-pressure water mist fire extinguishing systems (10) are opened and are put out a fire.

7. The application method of the anti-liquefaction and anti-floating underground comprehensive pipe gallery structure as claimed in claim 6, characterized in that: in the step (5), the method for judging fire occurrence by the air temperature and humidity illumination sensor (7) is temperature rise type temperature alarm and temperature difference type temperature alarm, and the fire occurrence is judged by meeting any one of the conditions, specifically:

A. temperature rise type temperature alarm: when the ambient temperature rises to 60-85 ℃ at the speed of 0.5 ℃ per minute, the fire is judged to happen, and the air temperature and humidity illumination sensor (7) gives an alarm in time;

B. temperature difference type temperature alarm: when the ambient temperature rises to 22 ℃ lower than the original ambient temperature within one minute, the fire is judged to happen, and the air temperature and humidity illumination sensor (7) gives an alarm in time.

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