CN212642720U - Indirect freezing device and freezing system - Google Patents
Indirect freezing device and freezing system Download PDFInfo
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- CN212642720U CN212642720U CN202020955917.8U CN202020955917U CN212642720U CN 212642720 U CN212642720 U CN 212642720U CN 202020955917 U CN202020955917 U CN 202020955917U CN 212642720 U CN212642720 U CN 212642720U
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Abstract
The utility model discloses an indirect freezing device and freezing system relates to engineering construction field. One embodiment of the indirect freezing apparatus includes: freezing pipes, which are closely and equidistantly arranged on the inner wall of the shield shell and are fixed on the inner wall of the shield shell by a fixing device; a filler filling a gap at both sides of the freezing pipe; and the heat insulation plate is arranged on the outer side of the freezing pipe. The utility model discloses stopped by the shield shell from interior to the risk of seeping water passageway between the radial trompil in-process production outward and the soil body and the shield shell from the root, still guaranteed to freeze the effective thickness that the wall formed simultaneously, ensured frozen validity and security.
Description
Technical Field
The utility model relates to an engineering construction technical field especially relates to an indirect freezing device and freezing system.
Background
The main principle of the existing freezing method construction technology is that a freezing pipe is directly driven into an underground water-containing stratum to enable the freezing pipe to be in direct contact with a soil body, the freezing pipe is designed to be arranged in a vertical, horizontal or inclined mode, then a saline solution is injected into the freezing pipe, a saline solution refrigerating system is operated to enable the stratum to be cooled and frozen, and a freezing wall with temporary bearing and water resisting functions is formed.
The construction risk related to shield machine receiving is mainly expressed as follows: the tunnel portal gushing phenomenon is frequent due to the fact that the soil body reinforcing quality is difficult to guarantee, then a large amount of water and soil loss is caused, the surrounding environment is damaged, adverse social effects are caused, and especially the risk of receiving construction operation of the shield machine under the conditions of deep earthing, high water pressure and strong infiltration stratum is huge. In case of leakage water danger in the receiving process of the shield machine, the water-containing soil body on the outer side of the tunnel needs to be sealed and frozen, and the shield machine has two measures under the prior art: the first measure is to arrange a vertical freezing pipe: the freezing pipes are implanted from the ground to the outer side of the shield shell from top to bottom, but the freezing pipes cannot be uniformly and densely distributed around the shield shell and cannot be in close contact with the shield shell, so that a water seepage channel exists between a soil body and the shield shell; the second measure is that the hole is radially opened from the inside to the outside of the shield shell, and then the freezing system is implanted into the soil body, so that a water seepage channel between the soil body and the shield shell can be solved, but the safety risk of water leakage exists in the hole opening process.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the utility model provides an indirect freezing device and freezing system can see through the shield shell and carry out the heat exchange of the inside and outside both sides of shield shell, thereby make the hoop that sees through the shield shell inboard and arrange freeze the pipe and carry out the heat exchange with the outer soil body of shield shell thereby make the cooling of water-bearing stratum freeze, indirect freezing technology has been realized, it encircles the freezing wall in the shield shell outside to form the annular shape, the risk of leaking and the risk of infiltration passageway between the soil body and the shield shell of having stopped by the shield shell from interior to the radial trompil in-process production in source, the effective thickness who freezes the wall formation has still been guaranteed simultaneously, frozen validity and security have been ensured.
To achieve the above object, according to one aspect of an embodiment of the present invention, an indirect freezing apparatus is provided. The utility model discloses indirect freezing device of embodiment includes: freezing pipes, which are closely and equidistantly arranged on the inner wall of the shield shell and are fixed on the inner wall of the shield shell by a fixing device; a filler filling a gap at both sides of the freezing pipe; and the heat insulation plate is arranged on the outer side of the freezing pipe.
Preferably, the frozen wall is formed around the outside of the shield shell in a circular ring shape.
Preferably, the indirect freezing apparatus further comprises a temperature measuring tube inserted into the temperature measuring hole of the freezing wall, and the temperature sensor is installed in the temperature measuring tube for temperature monitoring.
Preferably, the depth of the temperature sensing hole is close to and no greater than the thickness of the frozen wall.
Preferably, the top of the shield tunneling machine is not provided with a temperature measuring hole.
Preferably, the number of turns of the freezing tube corresponds to the length of the frozen wall.
Preferably, fixing means are provided at every first distance to fix the freezing pipes.
Preferably, the heat insulation board is a single layer or a double layer.
Preferably, the spacing of the freezing tubes is no greater than the thickness of the freezing wall.
To achieve the above object, according to another aspect of the embodiments of the present invention, there is provided a freezing system including the indirect freezing apparatus of the above embodiments.
One or more of the above embodiments of the present invention have the following advantages or advantages: the utility model discloses a shield shell outside moisture soil layer thoroughly seals water and freezes, forms the frozen wall that has interim bearing and water proof effect, seals the annular flowing water passageway along the casing circumference. Furthermore, the utility model discloses avoid by the shield shell from inside to outside radial trompil back to the soil body implant freezing system, and the secondary risk of leaking that produces along with.
Further effects of the above-mentioned non-conventional alternatives will be described below in connection with the embodiments.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor. In the drawings:
fig. 1 is a schematic view of an indirect freezing apparatus according to an embodiment of the present invention;
fig. 2 is a side view of a freezing tube arrangement according to an embodiment of the present invention;
fig. 3 is an enlarged view of portion a of fig. 2 according to an embodiment of the present invention;
FIG. 4 is a cross-sectional view of a freezing tube and a temperature measuring tube according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a freezing system according to an embodiment of the present invention;
wherein, 101-freezing tube; 102-shield shell; 103-diaphragm wall; 104-a heat-insulating board; 105-a filler; 106-a fixation device; 201-freezing the wall; 202-lining wall; 401-temperature measuring tube; 402-steel plate; 500-freezing system; 501-a brine circulating system; 502-a refrigeration cycle system; 503-clear water circulating system; 504-ring freezing line.
Detailed Description
Exemplary embodiments of the invention are described below with reference to the accompanying drawings, in which various details of embodiments of the invention are included to assist understanding, and which are to be considered exemplary only. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the invention. In addition, in the embodiments of the present invention, the same reference numerals denote the same devices. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness.
The utility model discloses be applied to the shield constructs machine among the tunnel construction and receive construction engineering, mainly be to the second way soil body reinforcement line of defending of taking in order to ensure that the shield constructs machine to receive safety, prevent to appear in the shield structure receiving process because of consolidating the incident that leaks water and cause in the soil body to receiving work well.
Therefore, the utility model relates to an utilize transmission heat such as steel sheet, see through medium such as shield shell steel sheet and carry out the heat exchange of the inside and outside both sides of steel sheet, thereby the messenger freezes the pipe and makes the cooling of water-bearing stratum freeze to stratum transmission cold volume through the shield shell, thereby prevent to shield and appear in the receiving process and freeze because of consolidating the safety accident that the soil body causes to the percolating water in the receiving work well, also stopped the risk of leaking by shield shell from interior to the radial trompil in-process production from the root, and guaranteed the effective thickness that freezes the wall and form, guarantee the validity and the security that freeze.
In summary, after the freezing system is started, temperature difference exists between the saline water refrigerant agent in the freezing pipe and the water-containing soil outside the shield shell, and by utilizing the performance characteristics of high heat conductivity of steel and the like, cold energy can be subjected to heat exchange between the saline water refrigerant agent and the water-containing soil around the freezing pipe, and the stratum is frozen to form a frozen soil cylinder, so that an indirect freezing process is realized, and the problems in the prior art are solved.
Next, the indirect freezing apparatus according to an embodiment of the present invention will be described in detail.
According to an aspect of the embodiments of the present invention, the present invention provides an indirect freezing apparatus based on fig. 1 to 4. The utility model discloses an indirect freezing device, include: freezing pipes which are closely and equidistantly arranged on the inner wall of the shield shell and are fixed on the inner wall of the shield shell by a fixing device; a filler filling a gap at both sides of the freezing pipe; and the heat insulation plate is arranged on the outer side of the freezing pipe.
Fig. 1 is a schematic view of an indirect freezing apparatus according to an embodiment of the present invention. Fig. 2 is a side view of a freezing tube arrangement according to an embodiment of the present invention. Fig. 3 is an enlarged view of a portion a of fig. 2 according to an embodiment of the present invention. Fig. 4 is a cross-sectional layout view of the freezing tube and the temperature measuring tube according to the embodiment of the present invention.
In an embodiment of the present invention, as shown in fig. 1 to 3, the freezing tube 101 (e.g., 9 turns of the freezing tube D1 to D9) is arranged inside the shield shell 102. The diaphragm wall 103 is on the outside of the shield 102, as shown in fig. 1 and 2. The interior lining wall 202 is on the side of the diaphragm wall 103 as shown in fig. 2.
The freezing pipe 101 utilizes the heat transferred by the shield shell 102 to perform heat exchange between the inner side and the outer side of the shield shell 102, so that the freezing pipe 101 transfers cold to the stratum through the shield shell 102, thereby cooling and freezing the water-containing stratum to realize indirect freezing, and forming a freezing wall 201 which is circularly arranged along the outer side of the shield shell 102 in a circular ring shape.
Further, 9 turns D1 to D9 of the freezing tube 101 are arranged against the inner wall of the shield 102 and fixed to the inner wall of the shield 102 with fixing means 106. Particularly, in the embodiment of the present invention, 9 circles of the freezing pipes 101 from D1 to D9 are arranged closely to the inner wall of the shield shell 102, the freezing pipes 101 are in close contact with the shield shell 102, and the arrangement of the freezing pipes 101 closely to the inner wall of the shield shell 102 is beneficial to improving the heat exchange capability between the freezing pipes 101 and the soil outside the shield shell 102, so as to better realize the indirect freezing effect and ensure the effectiveness and safety of freezing.
Thereafter, the freezing pipe 101 is pressed against the inner wall of the shield shell 102 by the fixing device 106 and fixed. An example of the fixture 106 may be a channel, and more specifically, may be a 5 channel. That is, in the example of the present invention, 9 turns of the D1 to D9 freezing pipes 101 are pressed by the No. 5 channel steel 106 and welded and fixed on the inner wall of the shield shell 102, so that the freezing pipes 101 are arranged and fixed tightly against the shield shell 102.
Further, fixing devices 106 may be provided at regular intervals to fix the freezing pipes 101. For example, 5-channel steel may be provided every 1 m.
Further, as can be seen from fig. 1 to 3, the freezing pipes 101D 1 to D9 are equally spaced on the inner wall of the shield 102. Furthermore, the distances between the freezing pipes 101 of D1 to D9 are, for example, 150mm, and the distances are not preferably larger than the thickness of the freezing wall, and reference is made to the enlarged view of the portion A in FIG. 2 in FIG. 3.
The freezing tubes 101 are arranged at equal intervals mainly to form two-by-two intersected continuous frozen soil cylinders under the action of a brine refrigeration system, so that a more effective freezing wall 201 is formed. Specifically, a frozen soil cylinder taking the freezing pipe as the center of a circle is gradually formed from small to large under the action of a saline water refrigerating system by a single freezing pipe. In order to make the frozen soil cylinders formed by the single pipe uniformly develop to reach the same diameter at the same moment and make two adjacent frozen soil cylinders intersect with each other to achieve the purpose of seamless lap joint, the freezing pipes 101 need to be arranged at equal intervals. Moreover, the freezing pipes 101 are arranged at equal intervals, so that the freezing pipes 101 can be uniformly and densely distributed around the shield shell 102.
Further, in the embodiment of the present invention, as shown in fig. 1, the filler 105 fills the gap on both sides of the freezing pipe 101. Also, an insulation board 104 is disposed outside the freezing pipe 101. In an example of the present invention, the filler 105 may be, for example, a two-piece cement. That is, for example, the gap on both sides of the freezing pipe 101 is filled with a double block of cement. Also, the insulation board 104 is disposed outside the freezing pipe 101 and the filler 105. According to the utility model discloses an embodiment, heated board 104 can be single-layer or double-deck. Also, the total thickness of the insulation board 104 is not less than, for example, 50 mm. The heat insulation board 104 is bound and fixed on the channel steel 106 by binding wires, the plates are in butt joint, and joints are bonded by polyurethane foaming agent.
In an embodiment of the present invention, as can be seen in conjunction with fig. 1 to 3, the freezing face is arranged with, for example, 9 turns of the freezing pipes D1 to D9. Here, the number of turns of the freezing pipe 101 is determined according to the effective freezing wall length.
Further, as shown in fig. 2 to 4, the freezing wall 201 is circumferentially arranged along the shield shell 102 in a circular ring shape. In the embodiment of the present invention, the thickness of the effective freezing wall can be 0.7m along the radial direction of the shield tunneling machine. According to the law of single-row hole frozen wall expansion speed, the effective frozen wall thickness can generally be 0.5-1.0m along the shield constructs quick-witted radial, the embodiment of the utility model provides a can take off safe value or empirical value for example, 0.7 m. For example, the effective freeze wall length may be 2.2m in the axial direction of the shield machine, which may be determined according to the number of turns of the freeze tube arrangement in the axial direction. That is, the number of turns of the freezing pipe 101 corresponds to the length of the freezing wall 201.
Further, as can be seen from fig. 4, the indirect freezing apparatus according to the embodiment of the present invention further includes a temperature measuring tube 401. The temperature tube 401 extends into the temperature hole of the frozen wall 201. Also, the depth of the temperature sensing hole is close to and no greater than the thickness of the frost wall 201. That is, as can be seen directly in FIG. 4, the thermometric tube 401 extends into the frozen wall, near the outside edge of the frozen wall 201, but does not penetrate the frozen wall 201.
In an embodiment of the invention, as shown in fig. 4, the temperature measuring tube 401 extends into the temperature measuring hole of the freezing wall 201, and the depth of the temperature measuring hole in the freezing wall 201 is 650mm, for example, which is a depth value set relative to the designed thickness of the freezing wall 201, for example 700 mm. This is because the closer the temperature measuring hole is to the boundary of the freezing wall 201, the more the measured temperature reflects the formation state of the freezing wall 201, but it is not preferably larger than the thickness of the freezing wall 201, so as to prevent the formation of a water seepage passage when penetrating the freezing wall 201. Thus, the depth of the temperature sensing hole may be close to and no greater than the thickness of the frost wall 201. In an example of an embodiment of the present invention, a temperature measuring tube 401, for example, a phi 40x3.5mm steel tube, is extended into a temperature measuring hole in the frozen wall 201 by a certain depth (for example, 650mm) as the temperature measuring tube 401. The temperature measuring hole is hermetically welded by a steel plate 402. A temperature sensor (not shown) is installed in the temperature measuring tube 401 for temperature monitoring.
The position of the temperature measuring hole can be properly adjusted according to the installation and the field condition of the freezing hole. More specifically, in an embodiment of the present invention, for example, between the freezing pipes D2-D3, one temperature measurement hole is arranged at an interval of 45 ° from the bottom of the shield machine, and a total of 7 temperature measurement holes are arranged, but no penetrating temperature measurement hole is arranged at the top, as shown in fig. 4. Because the existing core drilling machine is constructed, when holes are drilled in an inverted mode, cooling water in the center of a drill rod flows back to cause the motor of the drilling machine to be burned to cause faults, so that the temperature measuring holes are not arranged at the top of the drilling machine to avoid the faults, the effectiveness of freezing is guaranteed, and meanwhile safety is guaranteed. It is worth particularly noting that in the design for the temperature measuring hole arrangement, although the temperature measuring holes are not provided at the top as described above, according to probability theory: if the temperature measurement result of the temperature measurement holes uniformly arranged in other directions is more than 99 percent qualified, the success or failure of the whole freezing system can be basically reflected, and the freezing effect of the top can be completely reflected macroscopically.
Furthermore, in the embodiment of the present invention, the diameter of the freezing pipe ring is equal to the outer diameter of the shield machine-2 x the outer diameter of the shield machine-the outer diameter of the freezing pipe-the radial error (determined by the inner diameter of the shield shell). For example, with reference to the numerical values indicated in fig. 4, the outer diameter of the shield machine in this example is 6760mm, the wall thickness of the shield machine is 50mm, the outer diameter of the freezing pipe is 50mm, and the radial error is 30mm on each side, so that the ring diameter in this example is 6760-2 × 50-50-2 × 30 — 6550 mm.
In addition, the freezing pipe material is selected from the following components: the material with good heat conduction and low temperature performance is selected, and preferably, a stainless steel corrugated pipe (hose) is adopted. The utility model discloses freeze the pipe and adopt De50 3.5 stainless steel corrugated pipe, external diameter 50mm, wall thickness 3.5 mm. In an embodiment of the present invention, the shield shell is made of a heat conductive material, such as a steel plate.
All in all, the utility model discloses stopped by the shield shell from the root that the in-process produced of radially trompil from inside to outside risk and the risk of infiltration passageway between the soil body and the shield shell, and guaranteed the effective thickness that the wall formed that freezes, guaranteed frozen validity and security. That is to say, the utility model discloses an indirect freezing technique (i.e. freeze the pipe not with soil body direct contact) is a fine replenishment to current direct freezing technique (freezing pipe and soil body direct contact promptly), has filled the indirect blank that freezes technical field of underground works trade, has compensatied the technical drawback of direct freezing technique under certain type of specific operating mode. Moreover, the utility model realizes the complete water-sealing and freezing of the water-containing soil layer outside the shield shell, forms a freezing wall with temporary bearing and water-proof functions, and seals the annular water channel along the circumference of the shell; the problem that secondary water leakage risks (during hole opening, outflow along the hole wall) are generated along with the fact that a freezing system is implanted into the soil body after the shield shell is radially opened from inside to outside is also avoided, the effective thickness of the formed frozen wall is guaranteed, and the effectiveness and the safety of freezing are guaranteed.
Next, according to yet another aspect of the present invention, an embodiment of the present invention provides a freezing system. The freezing system of the embodiment of the present invention includes the indirect freezing apparatus described with reference to fig. 1 to 4. The freezing system includes the structure of the indirect freezing device and other related technical features, which are not repeated here. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness.
Fig. 5 is a schematic diagram of a freezing system according to an embodiment of the present invention. A freezing system 500 of an embodiment of the present invention will be explained with reference to fig. 5.
Referring to fig. 5, a freezing system 500 according to an embodiment of the present invention includes 3 parts: a brine circulating system 501, a refrigeration circulating system 502 and a clear water circulating system 503. In short, the heat of the soil mass in the brine circulation system 501 exchanges heat with the refrigerant in the refrigeration circulation system 502 through the brine in the brine pipe of the brine circulation system 501, and the heat generated in the refrigeration circulation system 502 exchanges heat with the clean water pipe of the clean water circulation system 503.
The brine circulation system 501 includes an annular freeze line 504 within the shield machine shown in figure 5. The annular in the shield constructs quick-witted pipeline 504 and adopts the above-mentioned freezing pipe 101 of the embodiment of the utility model. In short, in the embodiment of the present invention, for example, 9 rings of annular stainless steel corrugated pipes are arranged close to the inner wall of the shield shell 102 as the freezing pipes 101, the distance between the freezing pipes 101 is 150mm, and the cooling energy is transferred to the ground layer through the shield shell 102 to indirectly freeze by using brine for refrigeration.
The indirect freezing device and the freezing system of the embodiment of the utility model not only realize the complete water sealing and freezing of the moisture soil layer outside the shell of the shield machine, form a freezing wall with temporary bearing and water-proof functions, and seal the annular water channel along the circumference of the shell; and when the freezing system is implanted into the soil body after the shield machine shell is radially opened from inside to outside, water flows out along the hole wall due to the opening, and then the secondary water leakage risk is generated.
The above detailed description does not limit the scope of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions can occur, depending on design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An indirect freezing apparatus, comprising:
freezing pipes, wherein the freezing pipes are closely and equidistantly arranged on the inner wall of the shield shell and are fixed on the inner wall of the shield shell by a fixing device;
a filler filling a gap on both sides of the freezing pipe; and
the heat insulation plate is arranged on the outer side of the freezing pipe.
2. The indirect freezing apparatus of claim 1 wherein the freezing wall is formed around the outside of the shield in a circular ring shape.
3. The indirect freezing apparatus of claim 2, further comprising: and the temperature measuring pipe is inserted into the temperature measuring hole of the frozen wall, and the temperature sensor is arranged in the temperature measuring pipe for temperature monitoring.
4. An indirect freezing apparatus according to claim 3 wherein the temperature sensing aperture is of a depth close to and no greater than the thickness of the freezing wall.
5. The indirect freezing apparatus of claim 3, wherein no temperature measuring hole is provided on the top of the shield tunneling machine.
6. An indirect freezing apparatus according to claim 2 wherein the number of turns of the freezing tube corresponds to the length of the frozen wall.
7. The indirect freezing apparatus of claim 1 wherein said fixing means is provided at every first distance to fix said freezing tube.
8. The indirect freezing apparatus of claim 1 wherein the insulation board is single or double layered.
9. The indirect freezing apparatus of claim 2 wherein the freezing tubes are spaced no more than the thickness of the freezing wall.
10. A freezing system comprising an indirect freezing apparatus according to claims 1-9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020955917.8U CN212642720U (en) | 2020-06-01 | 2020-06-01 | Indirect freezing device and freezing system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020955917.8U CN212642720U (en) | 2020-06-01 | 2020-06-01 | Indirect freezing device and freezing system |
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| CN212642720U true CN212642720U (en) | 2021-03-02 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114060038A (en) * | 2021-10-29 | 2022-02-18 | 五邑大学 | Freezing reinforcement device and shield butt joint reinforcement method thereof |
| CN114856582A (en) * | 2022-05-25 | 2022-08-05 | 石家庄铁道大学 | Ultralow-temperature intelligent freezing water sealing system in stratum excavation |
-
2020
- 2020-06-01 CN CN202020955917.8U patent/CN212642720U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114060038A (en) * | 2021-10-29 | 2022-02-18 | 五邑大学 | Freezing reinforcement device and shield butt joint reinforcement method thereof |
| CN114060038B (en) * | 2021-10-29 | 2024-02-13 | 五邑大学 | Freezing reinforcement device and shield butt joint reinforcement method thereof |
| CN114856582A (en) * | 2022-05-25 | 2022-08-05 | 石家庄铁道大学 | Ultralow-temperature intelligent freezing water sealing system in stratum excavation |
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