CN112096414A - Lining segment for shield receiving engineering horizontal micro-freezing stratum and construction method thereof - Google Patents
Lining segment for shield receiving engineering horizontal micro-freezing stratum and construction method thereof Download PDFInfo
- Publication number
- CN112096414A CN112096414A CN202011118359.0A CN202011118359A CN112096414A CN 112096414 A CN112096414 A CN 112096414A CN 202011118359 A CN202011118359 A CN 202011118359A CN 112096414 A CN112096414 A CN 112096414A
- Authority
- CN
- China
- Prior art keywords
- freezing
- segment
- lining
- micro
- shield
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000007710 freezing Methods 0.000 title claims abstract description 119
- 238000010276 construction Methods 0.000 title claims abstract description 20
- 230000008014 freezing Effects 0.000 claims abstract description 104
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000002689 soil Substances 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 16
- 239000010959 steel Substances 0.000 claims description 16
- 239000007788 liquid Substances 0.000 claims description 7
- 230000003014 reinforcing effect Effects 0.000 claims description 7
- 230000005641 tunneling Effects 0.000 claims description 6
- 239000012267 brine Substances 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 4
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims description 4
- 239000003673 groundwater Substances 0.000 claims description 3
- 230000002787 reinforcement Effects 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims 2
- 230000000694 effects Effects 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 7
- 239000011241 protective layer Substances 0.000 description 3
- 239000011435 rock Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/08—Lining with building materials with preformed concrete slabs
- E21D11/083—Methods or devices for joining adjacent concrete segments
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
- E21D11/385—Sealing means positioned between adjacent lining members
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/001—Improving soil or rock, e.g. by freezing; Injections
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/0607—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield being provided with devices for lining the tunnel, e.g. shuttering
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention discloses a lining segment for a shield receiving engineering horizontal micro-freezing stratum, which comprises a plurality of arc-shaped segment bodies, wherein a plurality of splicing screw holes are formed in the radial section of each segment body, a plurality of annular hand holes are formed in the inner ring surface of each segment body, and the annular hand holes and the splicing screw holes are in one-to-one correspondence and are communicated with each other; a plurality of segment bodies are sequentially spliced to form an annular lining segment, freezing pipelines are embedded into the outer annular surface of each segment body, and the freezing pipelines between adjacent segment bodies are connected in series. After the lining segment is installed, the freezing equipment is positioned in the segment and forms a freezing system with the freezing circulation loop, shield construction is not influenced, and an in-tunnel freezing method for freezing the stratum around the tunnel from the interior of the tunnel is realized. The micro-freezing construction method freezes the gap between the outer wall of the lining segment and the soil layer to form the water stop hoop, and the water stop effect is good.
Description
The technical field is as follows:
the invention relates to a lining segment for a shield receiving engineering horizontal micro-freezing stratum and a construction method thereof.
Background art:
in the shield receiving engineering, when an underground tunnel is constructed by a manual freezing stratum method, on one hand, in the process that the shield is pushed to excavate after a freezing pipe is pulled out, a frozen soil curtain is disturbed to yield, and possibly cracks or even loosens and collapses, so that the seepage-proofing and reinforcing effects are influenced; on the other hand, when the underground water condition of the crossing section is complex and the hydraulic condition is different, the shield propulsion machine is communicated with the stratum with different longitudinal hydraulic conditions, the underground water is longitudinally moved through the gap between the segment lining and the rock-soil wall, and the underground water can possibly flow into the end well from the rear rock-soil body when the shield is received, so that serious engineering accidents such as seepage damage are caused.
Referring to fig. 1, in the subway construction, after the construction of a station main body structure 1 is finished, a shield machine is put down to open the stratums of two adjacent stations to form a subway tunnel, if the underground water exists in the stratums, when the envelope structure 2 is opened, the water can gush into the vehicle station main body to cause piping accidents, therefore, a freezing pipe needs to be driven into the soil layer to form the freezing envelope 3 on the peripheral soil layer of the tunnel, however, if a stratum with pressure water exists underground, the problem still cannot be solved, referring to fig. 2, during the tunneling process of a shield machine 4, a lining segment 5 is installed behind the shield machine to form a formed subway tunnel, but because the outer diameter of the lining segment is slightly smaller than the aperture of the shield tunneling machine, a gap 7 exists between the outer side of the lining segment and the stratum, grouting is needed to be carried out in the gap 7, and a grouting protective layer 6 is finally formed, but the seepage can be caused by the weak water stopping capability of the cementing body and the pipe piece wall and the uneven grouting effect. Under the condition that pressure water exists underground, the pressure water can be poured into a vehicle station main body through a gap 7 to cause engineering accidents when the shield machine opens the enclosure structure 2, the prior method is that, a steel tank 8 is placed in a station main body, the end part of the steel tank is welded with an embedded steel ring 9 on an enclosure structure 2, a shield machine 4 enters the closed steel tank 8 after the enclosure structure 2 is opened, and the steel tank is used for recovering the shield machine 4 and the inflowing underground pressure water, then the water in the tank body is pumped, and after the construction of the grouting protective layer is finished and the set strength is reached, the method is really effective in dismantling the steel tank, but the construction cost is high, because the shield machine is large in size, the longitudinal space in the station main body is limited, the steel tank can only be put down in sections and then spliced and welded into a whole section by section, the whole steel tank is high in construction cost, and labor and time are consumed in installation and dismantling.
The invention content is as follows:
in order to overcome the defects of the prior art, the invention aims to provide a lining segment for a horizontal micro-frozen stratum of a shield receiving project and a construction method thereof.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a lining segment for a shield receiving project horizontal micro-freezing stratum comprises a plurality of arc-shaped segment bodies, wherein a plurality of splicing screw holes are formed in the radial section of each segment body, a plurality of annular hand holes are formed in the inner ring surface of each segment body, and the annular hand holes and the splicing screw holes are in one-to-one correspondence and are communicated with each other; the axial section of each segment body is provided with a plurality of connecting screw holes, the inner annular surface of each segment body is provided with a plurality of axial hand holes, the axial hand holes and the connecting screw holes are in one-to-one correspondence and are communicated with each other, the segment bodies are sequentially spliced to form an annular lining segment, freezing pipelines are embedded in the outer annular surface of each segment body, and the freezing pipelines between adjacent segment bodies are connected in series.
Preferably, a groove is prefabricated on the outer annular surface of each segment body, and the freezing pipeline is formed by embedding a square steel pipe into the groove.
Preferably, the square steel pipe is bent back and forth to form a freezing pipeline which is in a U-shaped structure connected with each other in series, and the shape structure of the groove is matched with that of the freezing pipeline.
Preferably, the freezing pipe has a surface flush with or protruding from the surface of the segment body.
Preferably, the series of freezing lines has a main inlet and a main outlet, the main inlet and the main outlet are communicated with a freezing device, and the freezing device comprises a brine tank, a freezing unit and a cooling tower.
The construction method for the tunnel by using the lining segment comprises the following steps:
step (1): freezing and reinforcing the enclosure structure of the receiving end by using a horizontal freezing method, freezing and reinforcing a soil layer outside the enclosure structure in a cup shape, wherein the bottom of a cup of the cup is a full freezing area and is three meters long, and the annular area of the wall of the cup is a micro freezing area and is twelve meters long;
step (2): before the shield tunneling machine is propelled to a micro-freezing area, pulling out a horizontal freezing pipe, pre-installing lining segments according to a tunnel row ring, and simultaneously checking the installation positions of the lining segments to ensure that the axial width of the segments in the whole ring is within the range of a freezing reinforcement body;
and (3): assembling lining segments, wherein two circumferentially adjacent segment bodies are in bolt circumferential connection through a splicing screw hole, and two axially adjacent segment bodies are in bolt axial connection through a connecting screw hole, so that the segment bodies are assembled into a rigid tube ring lining; a water-stopping rubber strip is arranged at the circumferential connecting joint to prevent the groundwater leakage at the splicing joint after the pipe piece is supported;
and (4): after the lining segment is installed, freezing liquid provided by freezing equipment enters a freezing pipeline from a main inlet, and after circulation for one circle, the freezing liquid flows back to the freezing equipment from a main outlet, so that the freezing loop is constructed;
and (5): the lining segment freezes the soil layer, a water stop hoop is formed in a gap between the outer wall of the lining segment and the inner wall of the micro freezing area, and the shield machine continues to drive.
Compared with the prior art, the invention has the beneficial effects that:
after the lining segment is installed, the freezing equipment is positioned in the segment and forms a freezing system with the freezing circulation loop, shield construction is not influenced, and an in-tunnel freezing method for freezing the stratum around the tunnel from the interior of the tunnel is realized. The micro-freezing construction method freezes the gap between the outer wall of the lining segment and the soil layer to form the water stop hoop, and the water stop effect is good.
The freezing pipe is a zigzag loop freezing pipe embedded in the outer ring surface of the concrete pipe piece, the freezing pipe is arranged on the whole outer ring surface, the freezing pipe is parallel to the outer ring surface, the outer ring surface of the micro-freezing pipe piece is flat, the micro-freezing pipe piece can be tightly attached to a surrounding rock body, the heat transfer area is large, the pipe-soil contact area ratio reaches 20%, and effective heat transfer between the freezing pipe and a rock-soil body can be realized.
The freezing hose is sequentially connected with the annular pipe pieces to connect all the pipe pieces into the freezing circulation loop, and the freezing liquid can uniformly freeze the whole round underground rock-soil body when the pipe pieces circulate in the freezing circulation loop to construct a uniform low-temperature field. The annular freezing water-stop hoop formed by the low-temperature field can effectively prevent the underground water from longitudinally moving along the gap between the pipe piece and the surrounding rock.
Description of the drawings:
fig. 1 is a schematic view of a construction method in the prior art, fig. 2 is an enlarged view of a portion a of fig. 1, fig. 3 is a schematic view of a structure of a lining segment of the present invention, fig. 4 is a schematic view of construction using the lining segment of the present invention, and fig. 5 is an enlarged view of a portion B of fig. 4.
Reference numbers in the figures: the structure comprises a station main structure, a building enclosure structure 2, a freezing enclosure 3, a shield machine 4, a lining segment 5, a grouting protective layer 6, a gap 7, a steel tank 8, a pre-embedded steel ring 9, a segment body 10, a splicing screw hole 11, a ring hand hole 12, a connecting screw hole 13, an axial hand hole 14, a freezing pipeline 15, a main inlet 16, a main outlet 17, a brine tank 18, a freezing unit 19, a cooling tower 20 and a water stop hoop 21.
The present invention will be further described with reference to the following detailed description and accompanying drawings.
The specific implementation mode is as follows:
in order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the embodiment, referring to fig. 3-5, the lining segment of the embodiment includes a plurality of arc-shaped segment bodies 10, a plurality of splicing screw holes 11 are formed in a radial section of each segment body 10, a plurality of circumferential hand holes 12 are formed in an inner annular surface of each segment body, and the circumferential hand holes 12 and the splicing screw holes 11 are in one-to-one correspondence and are communicated with each other; during the concatenation, connect through bolt and nut in two concatenation screw holes 11 that correspond, can connect into a confined annular lining section of jurisdiction 5 with a plurality of curved section of jurisdiction bodies 10.
Be equipped with a plurality of connection screw holes 13 at the axial section of each section of jurisdiction body, and be equipped with a plurality of axial hand holes 14 at the interior anchor ring of section of jurisdiction body, axial hand hole 14 communicates with connection screw hole 13 one-to-one each other, and when two adjacent lining segments 5 splices, connects through bolt and nut in two connection screw holes 13 that correspond, can splice two adjacent lining segments along tunnel length direction.
As shown in fig. 3, freezing pipes 15 are embedded in the outer circumferential surface of each segment body 10, and the freezing pipes between adjacent segment bodies can be connected in series by a hose. Specifically, a groove is prefabricated on the outer annular surface of each segment body 10, and the freezing pipeline is a square steel pipe embedded in the groove. Furthermore, the square steel pipe is bent back and forth to form a freezing pipeline 15 which is in a U-shaped structure connected with each other in series, or the freezing pipeline is called as a freezing pipeline bent back and forth to form a zigzag shape, and the shape and the structure of the groove are matched with those of the freezing pipeline 15. Wherein the surface of the freezing pipeline 15 is flush with the surface of the segment body 10 or slightly protrudes from the surface of the segment body 10.
The freezing pipeline 15 connected in series in turn has a main inlet 16 and a main outlet 17, the main inlet and the main outlet are communicated with a freezing device, the freezing device comprises a brine tank 18, a freezing unit 19 and a cooling tower 20, and the freezing principle of the freezing device is the prior art and is not described in detail.
The construction method for the shield tunnel by adopting the lining segment comprises the following steps:
step 1: freezing and reinforcing the position of the envelope structure 2 of the receiving end by using a horizontal freezing method, freezing and reinforcing a soil layer outside the envelope structure 2 in a cup shape, wherein the bottom of a cup of the cup is a full freezing area and is three meters long, and an annular area of the wall of the cup is a micro freezing area and is 12 meters long;
step 2: before the shield tunneling machine is propelled to a micro-freezing area, pulling out a horizontal freezing pipe, pre-installing lining segments according to a tunnel row ring, and simultaneously checking the installation positions of the lining segments to ensure that the axial width of the segments in the whole ring is within the range of a freezing reinforcement body;
and step 3: assembling lining segments, wherein two circumferentially adjacent segment bodies 10 are in bolt circumferential connection through a splicing screw hole 11, and two axially adjacent segment bodies are in bolt axial connection through a connecting screw hole 13, so that the segment bodies are assembled into a rigid tube ring lining; a water-stopping rubber strip is arranged at the circumferential connecting joint to prevent the groundwater leakage at the splicing joint after the pipe piece is supported;
and 4, step 4: after the lining segment is installed, freezing liquid provided by freezing equipment enters a freezing pipeline 15 from a main inlet 16, and after circulation for one circle, the freezing liquid flows back to the freezing equipment from a main outlet 17, so that the freezing loop is constructed;
and 5: the lining segment freezes the soil layer, a water stop hoop 21 is formed in a gap between the outer wall of the lining segment and the inner wall of the micro freezing area, and the shield tunneling machine continues to tunnel.
In concrete construction, the outer diameter of the splicing-molded lining segment 5 is 6.2m, the thickness is 0.35m, a water stop rubber strip is arranged between two circumferentially adjacent segment bodies 10, the leakage of underground water at a splicing seam after the segment is supported can be prevented, wherein a circular grouting hole is arranged in the center of the radial inner annular surface of the segment body 10, the grouting holes can be used for synchronous grouting, the existing mature technology is adopted, other construction is the same as the prior art, and the repeated description is omitted.
It should be noted that the detailed description of the invention is not included in the prior art, or can be directly obtained from the market, and the detailed connection mode can be widely applied in the field or daily life without creative efforts, and the detailed description is not repeated here.
Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (6)
1. A lining segment for a shield receiving project horizontal micro-freezing stratum comprises a plurality of arc-shaped segment bodies (10), wherein a plurality of splicing screw holes (11) are formed in the radial section of each segment body (10), a plurality of annular hand holes (12) are formed in the inner ring surface of each segment body, and the annular hand holes (12) are in one-to-one correspondence with the splicing screw holes (11) and are communicated with each other; the axial cross section of each segment body is provided with a plurality of connecting screw holes (13), the inner annular surface of each segment body is provided with a plurality of axial hand holes (14), the axial hand holes (14) are in one-to-one correspondence with the connecting screw holes (13) and are communicated with each other, the segment bodies (10) are sequentially spliced to form an annular lining segment (5), the axial duct type heat exchanger is characterized in that freezing pipelines (15) are embedded into the outer annular surface of each segment body (10), and the freezing pipelines between the adjacent segment bodies are connected in series.
2. The lining segment for shield receiving engineering horizontal micro-freezing stratum according to claim 1, characterized in that the outer ring surface of each segment body (10) is prefabricated with a groove, and the freezing pipeline is a square steel pipe embedded in the groove.
3. The lining segment for the shield receiving engineering horizontal micro-freezing stratum as claimed in claim 2, wherein the square steel pipe is bent back and forth to form a freezing pipeline (15) in a U-shaped structure connected with each other in series, and the shape structure of the groove is matched with that of the freezing pipeline (15).
4. A lining segment for shield-receiving engineering horizontal micro-frozen ground formation according to claim 3, characterized in that the surface of the freezing pipe (15) is flush with the surface of the segment body (10) or protrudes from the surface of the segment body (10).
5. A lining segment for shield-receiving engineered level micro-frozen ground formation according to claim 1, characterized in that the freezing conduits (15) in series have a main inlet (16) and a main outlet (17), the main inlet and the main outlet communicating with freezing equipment comprising brine tanks (18), freezing battery banks (19) and cooling towers (20).
6. A lining segment construction method using any one of claims 1 to 5, characterized by comprising the steps of:
step (1): freezing and reinforcing the position of the enclosure structure (2) of the receiving end by using a horizontal freezing method, freezing and reinforcing a 'cup-shaped' soil layer outside the enclosure structure (2), wherein the bottom of a cup of the cup is a full freezing area and is three meters long, and an annular area of the wall of the cup is a micro freezing area and is twelve meters long;
step (2): before the shield tunneling machine is propelled to a micro-freezing area, pulling out a horizontal freezing pipe, pre-installing lining segments according to a tunnel row ring, and simultaneously checking the installation positions of the lining segments to ensure that the axial width of the segments in the whole ring is within the range of a freezing reinforcement body;
and (3): assembling lining segments, wherein two circumferentially adjacent segment bodies (10) are in bolt circumferential connection through a splicing screw hole (11), and two axially adjacent segment bodies are in bolt axial connection through a connecting screw hole (13), so that the segment bodies are assembled into a rigid tube ring lining; a water-stopping rubber strip is arranged at the circumferential connecting joint to prevent the groundwater leakage at the splicing joint after the pipe piece is supported;
and (4): after the lining segment is installed, freezing liquid provided by freezing equipment enters a freezing pipeline (15) from a main inlet (16), and after circulation for one circle, the freezing liquid flows back to the freezing equipment from a main outlet (17), so that the freezing loop is constructed;
and (5): the lining segment freezes the soil layer, a water stop hoop (21) is formed in a gap between the outer wall of the lining segment and the inner wall of the micro freezing area, and the shield machine continues to drive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011118359.0A CN112096414A (en) | 2020-10-19 | 2020-10-19 | Lining segment for shield receiving engineering horizontal micro-freezing stratum and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011118359.0A CN112096414A (en) | 2020-10-19 | 2020-10-19 | Lining segment for shield receiving engineering horizontal micro-freezing stratum and construction method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112096414A true CN112096414A (en) | 2020-12-18 |
Family
ID=73785696
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011118359.0A Pending CN112096414A (en) | 2020-10-19 | 2020-10-19 | Lining segment for shield receiving engineering horizontal micro-freezing stratum and construction method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112096414A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114109453A (en) * | 2021-11-05 | 2022-03-01 | 重庆交通大学 | Automatic heat preservation control structure of traffic tunnel in frozen soil district in season |
-
2020
- 2020-10-19 CN CN202011118359.0A patent/CN112096414A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114109453A (en) * | 2021-11-05 | 2022-03-01 | 重庆交通大学 | Automatic heat preservation control structure of traffic tunnel in frozen soil district in season |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110645440A (en) | Trenchless repairing device and method for large-diameter concrete drain pipe disjointing | |
| KR100761923B1 (en) | Non-digging Sewerage Mending Apparatus | |
| CN110878697A (en) | Shield underwater receiving method next to urban main road in high-water-rich sandy gravel stratum | |
| CN107672155A (en) | A kind of Pneumatic turnover equipment and renovation technique for pipeline rehabilitation | |
| CN112796763A (en) | Deep underground tunnel ventilation shaft supporting construction | |
| CN112065403A (en) | Steel pipe sheet device for freezing soil around tail of shield tunneling machine and construction method thereof | |
| CN102392653A (en) | Bent pipe one-sided freezing method for shield docking of stratum and freezing pipe driving device | |
| CN112096414A (en) | Lining segment for shield receiving engineering horizontal micro-freezing stratum and construction method thereof | |
| CN216518138U (en) | Vertical drainage system of shaft | |
| CN213331110U (en) | Lining segment for shield receiving engineering horizontal micro-freezing stratum | |
| CN207327592U (en) | A kind of Pneumatic turnover equipment for pipeline rehabilitation | |
| CN111472813A (en) | Super-large-span anchor-shotcrete support rock tunnel water-proof and drainage system and construction method | |
| CN209742908U (en) | Assembled large-section rectangular pipe jacking joint | |
| CN111794776A (en) | Induced joint structure of water delivery tunnel concrete lining | |
| CN213269887U (en) | Steel pipe sheet device for freezing soil around tail of shield tunneling machine | |
| CN115522531A (en) | Freezing system and construction method of elevator shaft or sump based on freezing method | |
| CN116291590A (en) | Active support anti-seepage steel pipe sheet for connecting channel port and construction method | |
| CN212896310U (en) | Anti-leakage pre-embedding device for ultra-deep underground diaphragm wall | |
| CN111396065B (en) | Replacement type grouting forming duct piece plugging method for high-pressure punching | |
| CN110241825B (en) | Backfill grouting construction method and structure for reservoir lining pipeline | |
| CN209780896U (en) | freezing device for tunnel excavation by freezing method | |
| CN112112248A (en) | Method for repairing defect of channel box | |
| CN218116468U (en) | Prevent inflation's slip casting pipeline of solidification | |
| CN220647057U (en) | Steel-concrete composite stainless steel pipe | |
| CN114382157B (en) | Construction method of concrete gas permeable well |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |