阅读说明：本技术 一种盾构对接冻结加固方法及装置 (Shield butt-joint freezing and reinforcing method and device ) 是由 胡俊 任军昊 于 2021-09-23 设计创作，主要内容包括：本发明提供一种盾构对接冻结加固方法及装置,装置包括盾构机、冻结管、土体区域划分单元、含水量检测机构、上位机以及冻结管调节机构,冻结加固方法步骤为：修正盾构机相对位置,使两侧盾构机轴线一致；划分盾构机端头外侧土体区域,并对不同的土体区域进行含水量检测；根据土体含水量调节冻结管在不同土体区域中的分布；向冻结管中通入低温盐水,对盾构机端头外侧土体进行冻结；拆除盾构机刀盘,焊接止水连接钢环板,通过对土体区域进行划分,并对不同土体区域进行含水量检测后,可以对应的调节冻结管在不同土体区域一侧的分布数量和间隔,从而可以最大限度的利用冷量传递进行冻结,防止发生冷量浪费现象,提高冻结效率。(The invention provides a shield docking freezing reinforcement method and a device, the device comprises a shield machine, a freezing pipe, a soil body region dividing unit, a water content detection mechanism, an upper computer and a freezing pipe adjusting mechanism, and the freezing reinforcement method comprises the following steps: correcting the relative position of the shield machine to make the axes of the shield machines on the two sides consistent; dividing soil body areas outside the end of the shield machine, and detecting water content of different soil body areas; adjusting the distribution of the freezing pipes in different soil areas according to the water content of the soil body; introducing low-temperature saline water into the freezing pipe, and freezing the soil body outside the end head of the shield machine; the shield machine cutter head is dismantled, the water stop connecting steel ring plate is welded, soil body areas are divided, after water content detection is carried out on different soil body areas, the distribution quantity and the distribution intervals of the freezing pipes on one sides of the different soil body areas can be correspondingly adjusted, so that the freezing pipes can be frozen by utilizing cold energy transmission to the maximum extent, the cold energy waste phenomenon is prevented, and the freezing efficiency is improved.)

1. A shield butt-joint freezing and reinforcing method is characterized by comprising the following steps:

step S1, correcting the relative position of the shield machine to make the axes of the shield machines on the two sides consistent;

step S2, dividing soil body areas outside the end of the shield tunneling machine, and detecting water content of different soil body areas;

s3, adjusting the distribution of the freezing pipes in different soil areas according to the water content of the soil body;

step S4, introducing low-temperature saline water into the freezing pipe, and freezing the soil body outside the end head of the shield machine;

and S5, removing the cutter head of the shield tunneling machine, and welding a water-stopping connecting steel ring plate.

2. The shield docking freezing and reinforcing method according to claim 1, wherein the step S2 of dividing the soil body region outside the shield end includes:

s211, acquiring the current geographic position information of the shield tunneling machine according to a GIS system;

step S212, obtaining surrounding river information and latitude information according to the geographical position information, and converting the river information and the latitude information into a first quantitative index and a second quantitative index respectively;

s213, acquiring depth information of the current shield machine, and converting the depth information into a third quantitative index;

step S214, weighting the first quantization index, the second quantization index and the third quantization index by using a weighting method, accumulating the weighted first quantization index, the weighted second quantization index and the weighted third quantization index, and obtaining division values;

and S215, determining the division number of the soil body area outside the end head of the shield tunneling machine according to the division value.

3. The shield docking freezing and reinforcing method according to claim 2, wherein in the step S214, when weighting is performed on the first quantization index, the second quantization index and the third quantization index by using a weighting method, weighting factors of the first quantization index, the second quantization index and the third quantization index are sequentially decreased.

4. The shield docking freezing and reinforcing method according to claim 1, wherein the concrete step of detecting the water content of different soil body areas in the step S2 includes:

step S221, extending a first electrode and a second electrode into a soil body area;

step S222, electrifying the first electrode and the second electrode;

step S223, collecting the current value of the line where the first electrode and the second electrode are electrified;

step S224, the current value is converted into water content.

5. The shield docking freezing and reinforcing method according to claim 1, wherein the specific steps of step S3 include:

step S31, movably arranging the freezing pipe on the inner side wall of the end head of the shield machine;

step S32, moving the freezing pipe to one side of different soil body areas;

and step S33, adjusting the number and the intervals of the freezing pipes according to the water content of the soil body area.

6. A shield docking and freezing reinforcement device applying the shield docking and freezing reinforcement method according to any one of claims 1 to 5, which is characterized by comprising a shield machine, a freezing pipe, a soil body region dividing unit, a water content detection mechanism, an upper computer and a freezing pipe adjusting mechanism, wherein the freezing pipe, the upper computer and the freezing pipe adjusting mechanism are arranged inside the shield machine, and the water content detection mechanism is arranged on the outer surface of the shield machine; the freezing pipe adjusting mechanism comprises a metal rotating ring, a metal ring, a driving mechanism, a first electromagnet and a second electromagnet, wherein the inner wall of the shield machine is provided with an annular groove, the metal ring is arranged in the annular groove, the metal rotating ring is arranged in the annular groove, one side of the outer surface of the metal rotating ring is provided with a baffle, an installation cavity is formed by the baffle and the outer surface of the metal rotating ring, a partition plate is arranged on the metal ring and is positioned in the installation cavity, the first electromagnet and the second electromagnet are symmetrically arranged on the outer wall of the freezing pipe, the freezing pipe is arranged in the installation cavity, the first electromagnet is in contact with the metal rotating ring, the second electromagnet is in contact with the metal ring, and the driving mechanism is arranged in the shield machine and is used for driving the metal rotating ring to rotate; the upper computer is respectively in data connection with the soil body region dividing unit, the water content detection mechanism, the first electromagnet, the second electromagnet and the driving mechanism.

7. The shield docking freezing reinforcement method and device according to claim 6, wherein the soil region dividing unit includes a river information obtaining unit, a latitude information obtaining unit, a depth information obtaining unit, a weighting unit and a dividing unit, the weighting unit is respectively connected with the river information obtaining unit, the latitude information obtaining unit, the depth information obtaining unit and the dividing unit in a data connection manner, and the dividing unit is connected with the upper computer in a data connection manner.

8. The shield docking freezing and reinforcing method and device according to claim 6, wherein the driving mechanism includes a rotating motor, a driving gear and a rack, the rack is distributed on the inner side wall of the metal rotating ring and forms a ring shape, the rotating motor is arranged in the shield machine, an output shaft of the rotating motor is connected with the driving gear, the driving gear is meshed with the rack, and the upper computer is in data connection with the rotating motor.

9. The shield tunneling machine butt-joint freezing and reinforcing method and device according to claim 6, wherein the water content detection mechanism comprises an arc-shaped plate, electric wheels, a first electrode, a second electrode, a battery pack and a current transformer, an annular track is arranged on the outer surface of the end portion of the shield tunneling machine, the arc-shaped plate is arranged in the annular track, the electric wheels are arranged on the concave surface of the arc-shaped plate, the first electrode and the second electrode are arranged on the convex surface of the arc-shaped plate, the current transformer and the battery pack are arranged inside the arc-shaped plate, two ends of the battery pack are respectively electrically connected with the first electrode and the second electrode through leads, the current transformer is sleeved outside the leads, and the upper computer is respectively electrically connected with the electric wheels and the current transformer.

10. The shield butt-joint freezing and reinforcing method and device according to claim 9, wherein the water content detection mechanism further comprises a distance adjustment mechanism, the distance adjustment mechanism comprises an arc-shaped guide rail, a movable seat and a driving motor, the arc-shaped guide rail is arranged on a convex surface of the arc-shaped plate, the movable seat is arranged on the arc-shaped guide rail, the first electrode and the second electrode are arranged on different movable seats, the driving motor is used for driving the movable seat to move on the arc-shaped guide rail, and the upper computer is in data connection with the driving motor.

Technical Field

The invention relates to the technical field of shield construction, in particular to a shield butt-joint freezing and reinforcing method and device.

Background

The shield butt joint is that two shield machines tunnel to the butt joint place in opposite directions in the stratum, carry out the butt joint in the stratum in order to accomplish the construction of whole tunnel, generally be applicable to the shield tunnel construction that buries deeply and apart from long, the shield butt joint divide into civil engineering butt joint and mechanical type butt joint method 2, wherein the soil wood type butt joint method is comparatively commonly used, and civil engineering butt joint method is through consolidating the ground point with the stratum, reaches the effect of stagnant water and preventing the stratum unstability, then accomplishes the shield and dismantles and execute tunnel lining.

The conventional reinforcing method comprises ground stratum reinforcement, an in-tunnel grouting auxiliary method and a freezing auxiliary method, when freezing construction is carried out by using the freezing method, when two shield machines are driven to a certain distance according to a civil butt joint method, mutual position adjustment of the axes of the two shield machines is started, then the two shield machines are driven to the shortest distance, after the two shield machines are close, equipment in the shield machines is started to be dismantled, freezing construction is carried out, a frozen soil curtain is formed on the periphery of a cutter head, after a freezing range is confirmed, the shield cutter head is started to be dismantled, steel plate welding construction connected with the two shield machines is carried out, when the cutter head is dismantled, the steel plate is dismantled according to subsection, and after the dismantling, a steel plate sealing exposed surface is immediately welded. The freezing method in shield butt joint is that a freezer is arranged in one side or two sides of a shield to freeze, so that the stratum at the butt joint of the shield is frozen to form a closed high-strength frozen soil curtain, underground water is prevented from entering a butt joint working face, external water and soil pressure is resisted, and a temporary supporting structure with both strength and water sealing property is provided for shield butt joint work.

The above process is complicated, equipment in the shield tunneling machine needs to be dismantled, a certain number of freezing pipes are inserted into soil, the defects that the number of freezing pipes driven into the soil is too large, freezing construction is complicated and the like exist, the position and distribution of freezing light cannot be adjusted correspondingly according to the water content of the soil, and freezing efficiency is poor.

Disclosure of Invention

Therefore, the invention provides a shield butt-joint freezing and reinforcing method and device, which can improve the freezing efficiency by detecting the water content of the soil body at the end of the shield machine and adjusting the distribution and the number of freezing pipes.

The technical scheme of the invention is realized as follows:

a shield butt-joint freezing and reinforcing method comprises the following steps:

step S1, correcting the relative position of the shield machine to make the axes of the shield machines on the two sides consistent;

step S2, dividing soil body areas outside the end of the shield tunneling machine, and detecting water content of different soil body areas;

s3, adjusting the distribution of the freezing pipes in different soil areas according to the water content of the soil body;

step S4, introducing low-temperature saline water into the freezing pipe, and freezing the soil body outside the end head of the shield machine;

and S5, removing the cutter head of the shield tunneling machine, and welding a water-stopping connecting steel ring plate.

Preferably, the specific step of dividing the soil body area outside the end of the shield tunneling machine in the step S2 includes:

s211, acquiring the current geographic position information of the shield tunneling machine according to a GIS system;

step S212, obtaining surrounding river information and latitude information according to the geographical position information, and converting the river information and the latitude information into a first quantitative index and a second quantitative index respectively;

s213, acquiring depth information of the current shield machine, and converting the depth information into a third quantitative index;

step S214, weighting the first quantization index, the second quantization index and the third quantization index by using a weighting method, accumulating the weighted first quantization index, the weighted second quantization index and the weighted third quantization index, and obtaining division values;

and S215, determining the division number of the soil body area outside the end head of the shield tunneling machine according to the division value.

Preferably, in the step S214, when the first quantization index, the second quantization index, and the third quantization index are weighted by a weighting method, weighting factors of the first quantization index, the second quantization index, and the third quantization index are sequentially decreased.

Preferably, the specific steps of detecting the water content of different soil body areas in step S2 include:

step S221, extending a first electrode and a second electrode into a soil body area;

step S222, electrifying the first electrode and the second electrode;

step S223, collecting the current value of the line where the first electrode and the second electrode are electrified;

step S224, the current value is converted into water content.

Preferably, the specific step of step S3 includes:

step S31, movably arranging the freezing pipe on the inner side wall of the end head of the shield machine;

step S32, moving the freezing pipe to one side of different soil body areas;

and step S33, adjusting the number and the intervals of the freezing pipes according to the water content of the soil body area.

A shield docking freezing and reinforcing device comprises a shield machine, a freezing pipe, a soil body region dividing unit, a water content detection mechanism, an upper computer and a freezing pipe adjusting mechanism, wherein the freezing pipe, the upper computer and the freezing pipe adjusting mechanism are arranged in the shield machine, and the water content detection mechanism is arranged on the outer surface of the shield machine; the freezing pipe adjusting mechanism comprises a metal rotating ring, a metal ring, a driving mechanism, a first electromagnet and a second electromagnet, wherein the inner wall of the shield machine is provided with an annular groove, the metal ring is arranged in the annular groove, the metal rotating ring is arranged in the annular groove, one side of the outer surface of the metal rotating ring is provided with a baffle, an installation cavity is formed by the baffle and the outer surface of the metal rotating ring, a partition plate is arranged on the metal ring and is positioned in the installation cavity, the first electromagnet and the second electromagnet are symmetrically arranged on the outer wall of the freezing pipe, the freezing pipe is arranged in the installation cavity, the first electromagnet is in contact with the metal rotating ring, the second electromagnet is in contact with the metal ring, and the driving mechanism is arranged in the shield machine and is used for driving the metal rotating ring to rotate; the upper computer is respectively in data connection with the soil body region dividing unit, the water content detection mechanism, the first electromagnet, the second electromagnet and the driving mechanism.

Preferably, the soil body region dividing unit comprises a river information acquiring unit, a latitude information acquiring unit, a depth information acquiring unit, a weighting unit and a dividing unit, wherein the weighting unit is respectively in data connection with the river information acquiring unit, the latitude information acquiring unit, the depth information acquiring unit and the dividing unit, and the dividing unit is in data connection with an upper computer.

Preferably, the driving mechanism comprises a rotating motor, a driving gear and a rack, the rack is distributed on the inner side wall of the metal rotating ring and forms a ring shape, the rotating motor is arranged in the shield tunneling machine, an output shaft of the rotating motor is connected with the driving gear, the driving gear is meshed with the rack, and the upper computer is in data connection with the rotating motor.

Preferably, water content detection mechanism includes arc, electronic round, first electrode, second electrode, group battery and current transformer, the shield constructs quick-witted tip surface and is provided with the circular orbit, the arc sets up in the circular orbit, electronic round sets up at the arc concave surface, first electrode and second electrode set up at the arc convex surface, current transformer and group battery setting are inside the arc, the both ends of group battery are connected through wire and first electrode, second electrode electricity respectively, the current transformer cover is established outside the wire, the host computer is connected with electronic round and current transformer electricity respectively.

Preferably, water content detection mechanism still includes apart from adjustment mechanism, apart from adjustment mechanism includes the arc guide rail, removes seat and driving motor, the arc guide rail sets up on the convex surface of arc, it sets up on the arc guide rail to remove the seat, first electrode and second electrode setting are on the removal seat of difference, driving motor is used for the drive to remove the seat and removes on the arc guide rail, host computer and driving motor data connection.

Compared with the prior art, the invention has the beneficial effects that:

the invention provides a shield docking freezing reinforcement method and a shield docking freezing reinforcement device, which are used for docking shield machines on two sides in a tunnel excavation process, firstly, after correcting the positions of the shield machines on the two sides, dividing soil body areas of an area to be docked, then, detecting the water content of all the divided soil body areas, and adjusting the freezing distribution according to the difference of the water content, so that the distribution quantity of freezing pipes in different soil body areas is different, thereby freezing soil bodies with different water contents in a differentiated manner, improving the freezing efficiency, avoiding conveying low-temperature saline water to the freezing pipes after partial soil bodies are frozen, and preventing the waste of cold energy.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only preferred embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive exercise.

FIG. 1 is a flow chart of a shield docking freezing reinforcement method according to the present invention;

FIG. 2 is a schematic structural diagram of a shield docking freezing and reinforcing device according to the present invention;

FIG. 3 is a schematic structural diagram of a freezing pipe of the shield butt freezing and reinforcing device according to the present invention;

FIG. 4 is a schematic diagram of a soil body region dividing unit of the shield docking freezing and reinforcing device of the invention;

FIG. 5 is a schematic structural diagram of a water content detection mechanism of a shield docking freezing and reinforcing device according to the present invention;

in the drawing, 1 is a shield machine, 2 is a freezing pipe, 3 is a soil body area dividing unit, 4 is an upper machine, 5 is a metal rotating ring, 6 is a metal ring, 7 is a first electromagnet, 8 is a second electromagnet, 9 is an annular groove, 10 is a baffle, 11 is a mounting cavity, 12 is a partition plate, 13 is a river information acquisition unit, 14 is a latitude information acquisition unit, 15 is a depth information acquisition unit, 16 is an empowerment unit, 17 is a dividing unit, 18 is a rotating motor, 19 is a driving gear, 20 is a rack, 21 is an arc-shaped plate, 22 is an electric wheel, 23 is a first electrode, 24 is a second electrode, 25 is a battery pack, 26 is a current transformer, 27 is an annular rail, 28 is a lead wire, 29 is an arc-shaped guide rail, 30 is a moving seat, and 31 is a driving motor.

Detailed Description

For a better understanding of the technical content of the present invention, a specific embodiment is provided below, and the present invention is further described with reference to the accompanying drawings.

Referring to fig. 1 to 5, the shield butt-joint freezing and reinforcing method provided by the invention comprises the following steps:

step S1, correcting the relative position of the shield machine 1 to make the axes of the shield machines 1 at two sides consistent;

step S2, dividing soil body areas outside the end head of the shield tunneling machine 1, and detecting water content of different soil body areas;

s3, adjusting the distribution of the freezing pipes 2 in different soil areas according to the water content of the soil;

step S4, introducing low-temperature saline water into the freezing pipe 2, and freezing the soil body outside the end head of the shield tunneling machine 1;

and S5, removing the cutter head of the shield machine 1, and welding a water-stopping connecting steel ring plate.

The invention relates to a shield docking freezing and reinforcing method, which is used for docking shield machines 1 on two sides in the tunnel excavation process, before docking, firstly, the position adjustment is carried out according to the specific positions of the two shield machines 1, the axes of the shield machines 1 are corrected to ensure that the axes of the two shield machines 1 are consistent, then, soil mass on the outer side of the end head of the shield machines 1 is divided into a plurality of soil mass areas, water content detection is carried out on all the soil mass areas, the distribution condition of freezing pipes 2 is correspondingly adjusted according to the different water content of each area, the number of the freezing pipes 2 used in the area with higher water content is larger, then, low-temperature saline water is introduced into the freezing pipes 2, when the low-temperature saline water flows, cold energy can be transferred into the adjacent soil mass areas, the water in the soil mass areas is frozen to form frozen soil curtains, then cutter heads of the shield machines 1 are dismantled, and the steel ring plates are connected by welding water stop to form support, and finally shield butt joint is completed, and the distribution of the freezing pipes 2 is adjusted according to the water content of the soil body, so that the freezing can be efficiently carried out, and the freezing efficiency is improved.

Because the water content and the moisture distribution in the soil body of different areas, degree of depth are different, if adopt the freezing mode of no difference then can cause the waste of a large amount of cold volumes, can divide the soil body region earlier for this reason before freezing, to some more moist regions, the water content difference between the soil body is great, consequently can increase the quantity that the soil body was divided to the realization is to freezing of formula, in some arid regions, because of the water content difference between the soil body is not big, consequently can be less with the quantity that the soil body region was divided.

Preferably, the specific step of dividing the soil body area outside the end of the shield tunneling machine 1 in the step S2 includes:

s211, acquiring the current geographic position information of the shield tunneling machine 1 according to a GIS system;

step S212, obtaining surrounding river information and latitude information according to the geographical position information, and converting the river information and the latitude information into a first quantitative index and a second quantitative index respectively;

s213, acquiring depth information of the current shield machine 1, and converting the depth information into a third quantitative index;

step S214, weighting the first quantization index, the second quantization index and the third quantization index by using a weighting method, accumulating the weighted first quantization index, the weighted second quantization index and the weighted third quantization index, and obtaining division values, wherein weighting factors of the first quantization index, the weighted second quantization index and the weighted third quantization index are sequentially reduced;

and S215, determining the division number of the soil body area outside the end head of the shield tunneling machine 1 according to the division value.

The water content of the soil body in the areas with more surrounding rivers, lower latitudes and deeper depths is higher, therefore, whether the water content of the area is more or not is judged by obtaining the latitudes, the distribution and the depths of the surrounding rivers of the shield construction area, and the water content is used as a dividing basis to determine the number of the divided areas.

When river information, latitude information and depth information are obtained, the number of rivers and the depth information are positively correlated with the water content, so that the rivers can be directly used as a first quantitative index and a third quantitative index, the latitude information is negatively correlated, namely the lower the latitude is, the larger the water content is, therefore, a latitude gradient range can be set, for example, 9 levels are set between 0- +/-10 degrees, the other levels are sequentially reduced, so that the latitude information is converted into a second quantitative index, then, a weighting method is adopted to set weighting factors for the first quantitative index, the second quantitative index and the third quantitative index, the weighting factors are multiplied with the quantitative indexes, then, a summation mode is adopted to obtain division values, and the final soil body division area division number with the smaller division value is less.

Preferably, the specific steps of detecting the water content of different soil body areas in step S2 include:

step S221, extending a first electrode 23 and a second electrode 24 into the soil body area;

step S222 of energizing the first electrode 23 and the second electrode 24;

step S223, collecting the current value of the line where the first electrode 23 and the second electrode 24 are electrified;

step S224, the current value is converted into water content.

The invention adopts a current measuring mode for detecting the water content of the soil body, after the first electrode 23 and the second electrode 24 move to different soil body areas for electrifying, the current value in the loop is measured, the resistivity of the soil body is obtained according to the current value so as to obtain the water content of the soil body, and finally the distribution of the freezing pipes 2 can be adjusted according to the water content.

Preferably, the specific step of step S3 includes:

step S31, movably arranging the freezing pipe 2 on the inner side wall of the end head of the shield tunneling machine 1;

step S32, moving the freezing pipe 2 to one side of different soil body areas;

and step S33, adjusting the number and the intervals of the freezing pipes 2 according to the water content of the soil body area.

After the freezing pipe 2 is arranged on the inner wall of the end head of the shield machine 1, the cold energy of the freezing pipe 2 can be conveyed through the outer wall of the shield machine 1, at the moment, the outer wall of the shield machine 1 is equivalent to a freezing plate, so that the freezing pipe 2 does not need to be inserted into a soil body, and the freezing of different soil body areas can be realized by adjusting the distribution of the freezing pipe 2.

The invention provides a shield docking freezing and reinforcing device, which comprises a shield machine 1, a freezing pipe 2, a soil body region dividing unit 3, a water content detection mechanism, an upper computer 4 and a freezing pipe adjusting mechanism, wherein the freezing pipe 2, the upper computer 4 and the freezing pipe adjusting mechanism are arranged in the shield machine 1, and the water content detection mechanism is arranged on the outer surface of the shield machine 1; the freezing pipe adjusting mechanism comprises a metal rotating ring 5, a metal ring 6, a driving mechanism, a first electromagnet 7 and a second electromagnet 8, the inner wall of the shield machine 1 is provided with an annular groove 9, the metal ring 6 is arranged in the annular groove 9, the metal rotating ring 5 is arranged in the annular groove 9, a baffle plate 10 is arranged on one side of the outer surface of the metal rotary ring 5, a mounting cavity 11 is formed by the baffle plate 10 and the outer surface of the metal rotary ring 5, the metal ring 6 is provided with a partition plate 12, the partition plate 12 is positioned in the installation cavity 11, the first electromagnet 7 and the second electromagnet 8 are symmetrically arranged on the outer wall of the freezing pipe 2, the freezing pipe 2 is arranged in the installation cavity 11, the first electromagnet 7 is contacted with the metal rotating ring 5, the second electromagnet 8 is contacted with the metal ring 6, the driving mechanism is arranged in the shield tunneling machine 1 and used for driving the metal rotating ring 5 to rotate; the upper computer 4 is respectively in data connection with the soil body area dividing unit 3, the water content detection mechanism, the first electromagnet 7, the second electromagnet 8 and the driving mechanism.

The shield constructs machine 1 and is used for carrying out the tunnel tunnelling, when the shield structure machine 1 of both sides reaches the butt joint mileage, can divide the soil body of locating at present through soil body regional division unit 3 earlier, divide into a plurality of soil body region with the soil body around the shield structure machine 1 end, then water content detection mechanism can detect the water content in all soil body regions, detect the completion back, can adjust the quantity and the distribution that are located freezing pipe 2 of every soil body region one side through freezing pipe adjustment mechanism, thereby can realize freezing of differentiation, prevent to cause the waste of cold volume resource.

For the freezing pipe 2, the freezing pipe is arranged on the inner wall of the shield machine 1, when low-temperature saline water is introduced into the freezing pipe 2, cold energy can be transmitted into a soil body from the side wall of the shield machine 1 to freeze moisture in the soil body, in order to realize adjustment of the freezing pipe 2, a metal rotating ring 5 is arranged in the shield machine 1, the freezing pipe 2 is positioned in a mounting cavity 11 of the outer wall of the metal rotating ring 5, a first electromagnet 7 and a second electromagnet 8 are arranged on two sides of the freezing pipe 2, the first electromagnet 7 is in contact with the outer wall of the metal rotating ring 5, the second electromagnet 8 is in contact with a metal ring 6 in an annular groove, a driving mechanism is arranged in the shield machine 1 and can drive the metal rotating ring 5 to rotate, rotation and fixation of the freezing pipe 2 can be realized by controlling the connection and disconnection of the first electromagnet 7 and the second electromagnet 8, for example, the first electromagnet 7 is electrified, When 8 outage of second electro-magnets, actuating mechanism drives metal rotating ring 5 when rotatory, can drive and freeze pipe 2 and rotate, when 7 outage of first electro-magnets, when 8 circular telegrams of second electro-magnets, it can not follow metal rotating ring 5 rotatoryly to freeze pipe 2, after dividing the region and measuring the soil body moisture content, host computer 4 is through controlling the break-make respectively of first electro-magnet 7 and second electro-magnet 8 on each freezing pipe 2 in proper order, can realize will freezing pipe 2 and carry different positions, and can adjust the interval that freezes between the pipe 2.

The metal ring 6 is provided with the partition plate 12, the partition plate 12 partitions the installation cavity 11, when the freezing is not performed, all the freezing pipes 2 are stored in the installation cavity 11 above the partition plate 12, and when the positions of the freezing pipes 2 need to be adjusted, the metal rotating ring 5 can drive the first freezing pipe 2 to rotate to the position below the partition plate 12 for one circle, then the positions of the freezing pipes 2 are adjusted according to the rotation, and finally the position adjustment of all the freezing pipes 2 is achieved.

Preferably, the soil region dividing unit 3 includes a river information obtaining unit 13, a latitude information obtaining unit 14, a depth information obtaining unit 15, a weighting unit 16 and a dividing unit 17, the weighting unit 16 is respectively connected with the river information obtaining unit 13, the latitude information obtaining unit 14, the depth information obtaining unit 15 and the dividing unit 17 in a data mode, and the dividing unit 17 is connected with the upper computer 4 in a data mode.

The basis of soil body area division is calculated according to the number of rivers, the height of latitude and the depth, the empowerment unit 16 can empowerment or obtain division values, the division unit 17 sends the division basis to the upper computer 4 according to the division values, the upper computer 4 performs virtual area division, and then the water content detection mechanism can perform water content detection on each virtual soil body area.

Preferably, the driving mechanism comprises a rotating motor 18, a driving gear 19 and a rack 20, the rack 20 is distributed on the inner side wall of the metal rotating ring 5 and forms a ring shape, the rotating motor 18 is arranged in the shield tunneling machine 1, an output shaft of the rotating motor is connected with the driving gear 19, the driving gear 19 is meshed with the rack 20, and the upper computer 4 is in data connection with the rotating motor 18.

The rotating motor 18 drives the driving gear 19 to rotate, and the driving gear 19 can drive the metal rotating ring 5 to rotate.

Preferably, water content detection mechanism includes arc 21, electronic round 22, first electrode 23, second electrode 24, group battery 25 and current transformer 26, shield structure machine 1 tip surface is provided with circular orbit 27, arc 21 sets up in circular orbit 27, electronic round 22 sets up at arc 21 concave surface, first electrode 23 and second electrode 24 set up at arc 21 convex surface, current transformer 26 and group battery 25 set up inside arc 21, the both ends of group battery 25 are connected with first electrode 23, second electrode 24 electricity through wire 28 respectively, current transformer 26 cover is established at wire 28 outsidely, host computer 4 is connected with electronic round 22 and current transformer 26 electricity respectively.

When carrying out the water content and detecting, battery pack 25 constitutes the return circuit with first electrode 23, second electrode 24 and soil body, can produce the electric current in the return circuit, and current transformer 26 can respond to the electric current in wire 28 to carry the electric current and transmit for host computer 4, carry out the judgement of water content by host computer 4.

After detecting the water content in a soil body region, the electric wheel 22 is controlled to drive the arc plate 21 to move to different soil body regions for water content detection, and the annular track 27 is arranged on the outer surface of the shield tunneling machine 1, so that the arc plate 21 can be moved to any position on the outer surface of the shield tunneling machine 1 for water content detection.

Preferably, water content detection mechanism still includes apart from adjustment mechanism, apart from adjustment mechanism includes arc guide rail 29, removes seat 30 and driving motor 31, arc guide rail 29 sets up on the convex surface of arc 21, it sets up on arc guide rail 29 to remove seat 30, first electrode 23 and second electrode 24 set up on the removal seat 30 of difference, driving motor 31 is used for the drive to remove seat 30 and removes on arc guide rail 29, host computer 4 and driving motor 31 data connection.

Because the number of soil body area divisions can have differences, in order to ensure the accuracy of water content detection, the distance between the first electrode 23 and the second electrode 24 needs to be adjusted, and the first electrode 23 and the second electrode 24 are ensured to be positioned at the two ends of the area, therefore, the invention is provided with the arc-shaped guide rail 29, the driving motor 31 can drive the movable seat 30 to move on the arc-shaped guide rail 29, the first electrode 23 and the second electrode 24 are arranged on the movable seat 30, and the distance between the first electrode 23 and the second electrode 24 can be adjusted.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.