CN117189131A - Construction method of shield receiving reinforcement structure - Google Patents
Construction method of shield receiving reinforcement structure Download PDFInfo
- Publication number
- CN117189131A CN117189131A CN202311192716.1A CN202311192716A CN117189131A CN 117189131 A CN117189131 A CN 117189131A CN 202311192716 A CN202311192716 A CN 202311192716A CN 117189131 A CN117189131 A CN 117189131A
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- Prior art keywords
- ring
- liquid supply
- shield
- liquid
- supply ring
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Links
- 238000010276 construction Methods 0.000 title claims abstract description 21
- 230000002787 reinforcement Effects 0.000 title claims description 17
- 239000007788 liquid Substances 0.000 claims abstract description 92
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000002689 soil Substances 0.000 claims abstract description 27
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 17
- 238000001802 infusion Methods 0.000 claims abstract description 9
- 230000005641 tunneling Effects 0.000 claims abstract description 9
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 26
- 239000010959 steel Substances 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 10
- 238000003466 welding Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000009412 basement excavation Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
Landscapes
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention relates to a construction method of a shield receiving reinforcing structure, which is arranged in a receiving well, wherein the receiving well corresponds to a chiseling position of a shield machine to form a tunnel portal area, and the construction method comprises the following steps: arranging a portal ring along the edge of the portal area in the receiving well; a liquid supply ring is fixed outside the cavity door ring, the liquid supply ring is attached to the outer wall of the cavity door ring, and an infusion port is arranged at the top of the liquid supply ring; liquid nitrogen is conveyed into the liquid supply ring through the liquid conveying opening, and the liquid nitrogen fills the liquid supply ring and freezes soil around the tunnel portal ring; and starting the shield tunneling machine to break soil between the shield tunneling machine and the tunnel portal area, and driving the shield tunneling machine into the receiving well.
Description
Technical Field
The invention relates to the technical field of portal reinforcement, in particular to a construction method of a shield receiving reinforcement structure.
Background
In order to meet the increasing demands of urban underground space development, shield tunnel engineering construction is developing towards the directions of ultra-large diameter, ultra-long distance and ultra-deep earth, and ultra-large diameter shields under the conditions of large burial depth and high water pressure have high receiving risk and large difficulty, and once tunnel portal water leakage occurs in the receiving process, economic and social losses which are difficult to compensate are generated.
In the prior art, soil around the portal ring is grouted to prevent the collapse of the soil, but the grouted soil is slowly solidified, the time required for reinforcement is long, a great amount of time can be wasted during construction, and the grouting construction method has severe requirements on the soil in the construction section, such as in a weak water-rich bottom layer, and cannot achieve a good reinforcement effect through the grouting process.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a construction method of a shield receiving reinforcement structure, which is characterized in that surrounding soil is frozen through a liquid supply ring, so that the effect of quickly reinforcing the surrounding soil is achieved, the time is saved, and the reinforcement effect of howl is achieved for soft soil.
The technical scheme for achieving the purpose is that the construction method of the shield receiving reinforcement structure is arranged in a receiving well, the receiving well corresponds to a chiseling position of a shield machine to form a tunnel portal area, and the construction method comprises the following steps:
arranging a portal ring along the edge of the portal area in the receiving well;
a liquid supply ring is fixed outside the cavity door ring, the liquid supply ring is attached to the outer wall of the cavity door ring, and an infusion port is arranged at the top of the liquid supply ring;
liquid nitrogen is conveyed into the liquid supply ring through the liquid conveying opening, and the liquid nitrogen fills the liquid supply ring and freezes soil around the tunnel portal ring;
starting the shield machine to break soil between the shield machine and the tunnel portal area, driving the shield machine into the receiving well, attaching the liquid supply ring to the outer wall of the tunnel portal ring when the liquid supply ring is arranged, providing a plurality of angle steels, respectively positioning two end parts of the angle steels on two sides of a pipe body of the liquid supply ring,
and fixedly connecting the end part of the angle steel with the outer wall of the hole door ring.
Further, the angle steel is fixed to the hole door ring through welding.
Further, a plurality of angle steel is arranged at intervals along the outer wall of the hole door ring.
Further, after the liquid supply ring is arranged, a baffle is arranged on the outer wall of the hole door ring and close to the liquid supply ring, and the baffle blocks an external soil body to press the liquid supply ring.
Further, the height of the baffle is greater than the diameter of the liquid supply ring.
Furthermore, the liquid supply rings are multiple, and the cavity door ring is provided with multiple liquid supply rings at intervals.
Further, two liquid nitrogen is respectively poured into the two liquid delivery ports, so that the liquid delivery ring is fully filled.
Compared with the prior art, the invention has the following beneficial effects:
the surrounding soil body is frozen through the liquid supply ring, so that the effect of quickly reinforcing the surrounding soil body is achieved, the time is saved, and the soil body has good reinforcing effect when being used for a plurality of soft soil layers rich in water.
Drawings
FIG. 1 is an overall block diagram of a construction method of a shield receiving reinforcement structure according to the present invention.
Fig. 2 is a side view of a construction method of a shield receiving reinforcement structure according to the present invention.
Legend description: 1. a tunnel portal ring; 2. a liquid supply ring; 21. angle steel; 22. a baffle; 3. a receiving well.
Detailed Description
The invention will be further described with reference to the drawings and the specific examples.
Referring to fig. 1 and 2, a construction method of a shield receiving reinforcement structure is provided in a receiving well 3, wherein the receiving well 3 forms a portal area corresponding to a chiseling position of a shield machine, and the construction method comprises the following steps: arranging a portal ring 1 along the edge of the portal area in the receiving well 3; a liquid supply ring 2 is fixed outside the cavity door ring 1, the liquid supply ring 2 is attached to the outer wall of the cavity door ring 1, and an infusion port is arranged at the top of the liquid supply ring 2; liquid nitrogen is conveyed into the liquid supply ring 2 through the liquid conveying opening, and the liquid nitrogen fills the liquid supply ring 2 and freezes soil around the tunnel portal ring 1; and starting the shield tunneling machine to break soil between the shield tunneling machine and the tunnel portal area, and driving the shield tunneling machine into the receiving well 3.
In the present invention, a preferred embodiment is: when the liquid nitrogen is filled into the liquid feeding ring 2 through the liquid feeding port, the surrounding soil body is frozen by cold air carried by the liquid nitrogen, so that the surrounding soil body is reinforced, and preferably, the liquid feeding ring 2 is a stainless steel corrugated pipe.
Further, when the liquid supply ring 2 is arranged, the liquid supply ring 2 is attached to the outer wall of the hole door ring 1, a plurality of angle steels 21 are provided, two end parts of the angle steels 21 are respectively located at two sides of the pipe body of the liquid supply ring 2, and the end parts of the angle steels 21 are fixedly connected with the outer wall of the hole door ring 1.
In the present invention, a preferred embodiment is: the liquid supply ring 2 is fixed on the outer side of the cavity door ring 1 by using the angle steel 21, so that the liquid supply ring 2 is fixed outside the cavity door ring 1 without damage.
Further, the angle steel 21 is fixed to the tunnel portal ring 1 by welding.
Further, a plurality of angle steel 21 are arranged at intervals along the outer wall of the portal ring 1. Preferably, the angle steel 21 is an equilateral angle steel 21, 75mm is adopted every 300mm distance in the single liquid supply ring 2, the angle steel 21 with the thickness of 5mm is welded and fixed on the portal ring 1, the angle steel 21 needs to be uniformly arranged, if the sagging of the liquid supply ring 2 at the top is serious, the number of the angle steel 21 should be properly increased, and the interval between two adjacent angle steel 21 is reduced.
Further, after the setting of the liquid feeding ring 2 is completed, a baffle 22 is disposed on the outer wall of the hole door ring 1 and close to the liquid feeding ring 2, and the baffle 22 blocks the soil body outside from pressing the liquid feeding ring 2. Preferably, the baffle 22 is disposed on a side of the liquid supply ring 2 near the ground wall, so as to prevent the liquid supply ring 2 from being damaged due to the pressure of the liquid supply ring 2 caused by the soil body outside the frozen area scattering during the subsequent excavation process.
Further, the height of the baffle 22 is greater than the diameter of the liquid feeding ring 2.
Furthermore, the number of liquid feeding rings 2 is plural, and the plurality of liquid feeding rings 2 are arranged at intervals on the cavity door ring 1.
Further, two liquid nitrogen is respectively poured into the two liquid delivery ports to fully fill the liquid supply ring 2. In the present invention, a preferred embodiment is: because the liquid nitrogen has strong volatility, one infusion port can be used for pouring in the pouring process, and the other infusion port is used for discharging the gas volatilized by the liquid nitrogen; and in order to ensure that the freezing effects on the two sides of the portal ring 1 are consistent, two infusion ports are adopted for carrying out an alternate infusion method.
The following describes the use process of a construction method of a shield receiving reinforcement structure.
Before the regional excavation of tunnel portal the outside cover of tunnel portal circle 1 is established two supply liquid ring 2, supply liquid ring 2 to fix through angle steel 21, angle steel 21 with fix through the welding between the tunnel portal circle 1, a plurality of the spaced setting of angle steel 21, in order to guarantee supply liquid ring 2 can laminate in the tunnel portal circle 1, through the infusion mouth is right supply liquid ring 2 to when filling liquid nitrogen, the soil body around is frozen to the air conditioning that liquid nitrogen self had, in order to consolidate the soil body around, preferably, supply liquid ring 2 is stainless steel bellows.
The present invention has been described in detail with reference to the embodiments of the drawings, and those skilled in the art can make various modifications to the invention based on the above description. Accordingly, certain details of the illustrated embodiments are not to be taken as limiting the invention, which is defined by the appended claims.
Claims (8)
1. The construction method of the shield receiving reinforcement structure is arranged in a receiving well, and the receiving well corresponds to a chiseling position of a shield machine to form a tunnel portal area, and is characterized by comprising the following steps:
arranging a portal ring along the edge of the portal area in the receiving well;
a liquid supply ring is fixed outside the cavity door ring, the liquid supply ring is attached to the outer wall of the cavity door ring, and an infusion port is arranged at the top of the liquid supply ring;
liquid nitrogen is conveyed into the liquid supply ring through the liquid conveying opening, and the liquid nitrogen fills the liquid supply ring and freezes soil around the tunnel portal ring;
and starting the shield tunneling machine to break soil between the shield tunneling machine and the tunnel portal area, and driving the shield tunneling machine into the receiving well.
2. The method for constructing a shield receiving reinforcing structure according to claim 1, wherein: when the liquid supply ring is arranged, the liquid supply ring is attached to the outer wall of the hole door ring, a plurality of angle steels are provided, two end parts of the angle steels are respectively positioned at two sides of the pipe body of the liquid supply ring,
and fixedly connecting the end part of the angle steel with the outer wall of the hole door ring.
3. The construction method of the shield receiving reinforcement structure according to claim 2, characterized by comprising the steps of: the angle steel is fixed on the hole door ring through welding.
4. The construction method of the shield receiving reinforcement structure according to claim 2, characterized by comprising the steps of: the angle steel is arranged at intervals along the outer wall of the hole door ring.
5. The method for constructing a shield receiving reinforcing structure according to claim 1, wherein: after the liquid supply ring is arranged, a baffle is arranged on the outer wall of the hole door ring and close to the liquid supply ring, and the baffle blocks an external soil body to press the liquid supply ring.
6. The construction method of the shield receiving reinforcement structure according to claim 5, wherein: the height of the baffle is larger than the diameter of the liquid supply ring.
7. The method for constructing a shield receiving reinforcing structure according to claim 1, wherein: the liquid supply rings are multiple, and the cavity door ring is provided with multiple liquid supply rings at intervals.
8. The method for constructing a shield receiving reinforcing structure according to claim 1, wherein: the two liquid feeding ports are respectively filled with liquid nitrogen so as to fully fill the liquid feeding ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311192716.1A CN117189131A (en) | 2023-09-15 | 2023-09-15 | Construction method of shield receiving reinforcement structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311192716.1A CN117189131A (en) | 2023-09-15 | 2023-09-15 | Construction method of shield receiving reinforcement structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117189131A true CN117189131A (en) | 2023-12-08 |
Family
ID=88988434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311192716.1A Pending CN117189131A (en) | 2023-09-15 | 2023-09-15 | Construction method of shield receiving reinforcement structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117189131A (en) |
-
2023
- 2023-09-15 CN CN202311192716.1A patent/CN117189131A/en active Pending
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