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CN-224213306-U - Carbon dioxide phase change fracturing broken rock step structure

CN224213306UCN 224213306 UCN224213306 UCN 224213306UCN-224213306-U

Abstract

The utility model provides a carbon dioxide phase change fracturing broken rock step structure, which belongs to the field of rock construction and comprises a first fracturing area and a second fracturing area, wherein the first fracturing area and the second fracturing area are oppositely arranged, the first fracturing area comprises a plurality of first fracturing steps which are sequentially connected from bottom to top, the second fracturing area comprises a plurality of second fracturing steps which are sequentially connected from bottom to top, the first fracturing steps and the second fracturing steps are oppositely arranged in a one-to-one correspondence manner, and each first fracturing step and each second fracturing step are provided with a cutting groove. The method aims at solving the problem that the effect of cracking rock by a liquid carbon dioxide cracker in a foundation pit in the prior art is poor. The technical effect that reaches is realized better crushing effect, avoids the condition that the rock fracture crushing effect is relatively poor because the strong rock clamp is used for manufacturing.

Inventors

  • WANG XIAOYAN
  • ZHAO CHENGLONG
  • HU ZONGMING
  • LIU WEIFENG
  • ZOU DEYU
  • ZHAI SHUNPENG
  • XU SHUANGSHUANG

Assignees

  • 中铁十九局集团华东工程有限公司

Dates

Publication Date
20260508
Application Date
20250429

Claims (10)

  1. 1. The utility model provides a broken rock step structure of carbon dioxide phase transition fracturing, its characterized in that includes first unanimous district (1) and second fracturing district (2), first unanimous district (1) with second fracturing district (2) set up relatively, first unanimous district (1) include a plurality of first unanimous steps (15) that connect gradually from supreme down, second fracturing district (2) include a plurality of second steps (25) that fracture from supreme connecting gradually down, a plurality of first unanimous step (15) and a plurality of second step (25) correspond relatively, every first unanimous step (15) and every second fracturing step (25) are gone up and are all offered cutting groove (3).
  2. 2. The carbon dioxide phase transition fracturing crushed rock step structure according to claim 1, wherein the surface of each first fracturing step (15) is provided with a plurality of first fracturing holes (14) at intervals, and the surface of each second fracturing step (25) is provided with a plurality of second fracturing holes (24) at intervals.
  3. 3. The carbon dioxide phase change fracturing crushed rock step structure according to claim 2, wherein a first protective layer (12) is arranged between each first fracturing hole (14) and the continuous wall (8), and a second protective layer (22) is arranged between each second fracturing hole (24) and the continuous wall (8).
  4. 4. The carbon dioxide phase transition fracturing crushed rock step structure according to claim 2, characterized in that the central axes of the plurality of first fracturing apertures (14) of each first fracturing step (15) are coplanar and the central axes of the plurality of second fracturing apertures (24) of each second fracturing step (25) are coplanar.
  5. 5. The carbon dioxide phase transition fracturing crushed rock step structure according to claim 2, characterized in that the diameter of each first fracturing aperture (14) and the diameter of each second fracturing aperture (24) are comprised between 110mm and 130 mm.
  6. 6. The carbon dioxide phase transition fracturing crushed rock step structure according to claim 1, characterized in that the height of each first fracturing step (15) and each second fracturing step (25) is 3 to 6 meters high.
  7. 7. The carbon dioxide phase transition fracturing crushed rock step structure according to claim 1, characterized in that the angle of the step slope (7) of each first fracturing step (15) and the angle of the step slope (7) of each second fracturing step (25) are both between 60 degrees and 90 degrees.
  8. 8. The carbon dioxide phase transition fracturing crushed rock step structure according to claim 1, characterized in that the cross-sectional shape of the cutting groove (3) is trapezoidal.
  9. 9. The carbon dioxide phase transition fracturing crushed rock step structure according to claim 4, characterized in that the distance between two adjacent first fracturing apertures (14) and the distance between two adjacent second fracturing apertures (24) are each between 1.7 meters and 2.0 meters.
  10. 10. A carbon dioxide phase transition fracturing crushed rock step structure according to claim 3, characterised in that the thickness of the first protective layer (12) and the thickness of the second protective layer (22) are both larger than 1.5m.

Description

Carbon dioxide phase change fracturing broken rock step structure Technical Field The utility model relates to the technical field of rock construction, in particular to a carbon dioxide phase-change fracturing broken rock step structure. Background The phase change fracturing rock stratum of liquid carbon dioxide in the foundation pit is a high-efficiency rock stratum crushing technology, and the characteristic that the liquid carbon dioxide is gasified and expanded rapidly after being heated is utilized to generate huge pressure to crack the rock stratum. In the process of excavation of foundation pits, liquid carbon dioxide phase transition fracturing technology has been widely used in a variety of fields. For example, in subway foundation pit excavation, the technology can realize stepped fracturing excavation, and construction efficiency and quality are improved. However, the foundation pit has the characteristics of only one free surface, no free surface exists around, and the rock clamping effect is strong, so that the effect of cracking the rock by using the liquid carbon dioxide cracking device is poor, and the cracking and breaking of the rock are unfavorable. Disclosure of utility model The utility model provides a carbon dioxide phase-change fracturing rock step structure, which is used for solving the defect of poor effect of fracturing rock by a liquid carbon dioxide fracturing device in a foundation pit in the prior art, realizing good fracturing effect and avoiding the occurrence of the condition of poor fracturing and fracturing effect of the rock due to strong manufacturing use of a rock clamp. The utility model provides a carbon dioxide phase change fracturing rock step structure which comprises a first fracturing area and a second fracturing area, wherein the first fracturing area and the second fracturing area are oppositely arranged, the first fracturing area comprises a plurality of first fracturing steps which are sequentially connected from bottom to top, the second fracturing area comprises a plurality of second fracturing steps which are sequentially connected from bottom to top, the first fracturing steps and the second fracturing steps are oppositely arranged in a one-to-one correspondence manner, and each first fracturing step and each second fracturing step are provided with a cutting groove. According to the carbon oxide phase change fracturing and rock breaking step structure, the lateral free surface of the first free surface or the second free surface is created for the carbon dioxide fracturing rock by the arrangement of the cutting groove, so that a good breaking effect is achieved, and the condition that the rock fracturing and breaking effect is poor due to the fact that the rock clamp is strong in manufacturing is avoided. In addition, the carbon dioxide phase-change fracturing broken rock step structure can also have the following additional technical characteristics: in some embodiments of the present utility model, the surface of each first fracturing stage is provided with a plurality of first fracturing holes at intervals, and the surface of each second fracturing stage is provided with a plurality of second fracturing holes at intervals. Through adopting above-mentioned embodiment, all offer a plurality of first unanimous crack holes on every first step that splits and all offer a plurality of second crack hole that splits on every second step that splits, realize every first unanimous crack step or every second crack step and carry out the rock breakage and split when breaking and split, can use simultaneously a plurality of pipe that splits to lead to the fact and break and lead to the fact, increase the speed that the rock breakage led to the split. In some embodiments of the present utility model, a first protective layer is disposed between each first fracturing aperture and the continuous wall, and a second protective layer is disposed between each second fracturing aperture and the continuous wall. Through adopting above-mentioned embodiment, the setting of first protective layer and second protective layer can reduce the influence of phase transition fracturing rock to the diaphragm wall, avoids appearing the diaphragm wall condition of collapsing when the phase transition fracturing. In some embodiments of the utility model, the central axes of the plurality of first fracturing apertures of each first fracturing step are coplanar and the central axes of the plurality of second fracturing apertures of each second fracturing step are coplanar. By adopting the embodiment, the first uniform cracking holes on each first uniform cracking step and the second cracking holes on each second uniform cracking step are arranged in a row, so that the construction safety is ensured. In some embodiments of the utility model, the diameter of each first fracturing aperture and the diameter of each second fracturing aperture are between 110mm and 130 mm. In some embodimen