CN210118135U - Back grouting device suitable for tunnel prefabricated lining segment structure by excavator method - Google Patents
Back grouting device suitable for tunnel prefabricated lining segment structure by excavator method Download PDFInfo
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- CN210118135U CN210118135U CN201920029709.2U CN201920029709U CN210118135U CN 210118135 U CN210118135 U CN 210118135U CN 201920029709 U CN201920029709 U CN 201920029709U CN 210118135 U CN210118135 U CN 210118135U
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Abstract
The back grouting device is suitable for a tunnel prefabricated lining segment structure by a tunneling machine method, the structure of the grouting device is optimized, the installation and use convenience of the grouting device is effectively improved, and the timeliness and reliability of back backfill grouting of segments and the tunnel segment assembling quality are ensured. Connectors are fixedly arranged on two sides of the outer wall of the extension section of the hoisting hole embedded part, and filter holes which penetrate through the outer wall of the extension section and are communicated with the inner cavity of the extension section are arranged in the connectors at intervals. The annular grouting pipe comprises L-shaped two-way pipes positioned at two ends of the annular direction and arc-shaped grouting pipe sections positioned between the hoisting hole embedded part and the L-shaped two-way pipes, one end of each arc-shaped grouting pipe section at two sides of the hoisting hole embedded part is inserted into the connector, and two adjacent arc-shaped grouting pipe sections, the L-shaped two-way pipes and the adjacent arc-shaped grouting pipe sections are connected in an inserted manner through annular ports of the three-way connectors; the slurry outlet pipe is inserted and installed on each arc-shaped grouting pipe section and the radial port of the L-shaped two-way pipe.
Description
Technical Field
The patent of the utility model relates to a tunnel engineering, in particular to slip casting device behind one's back suitable for tunnel prefabrication lining cutting section of jurisdiction structure of machine-entering method.
Background
The tunneler method includes a TBM suitable for rock formations and a shield (shield) suitable for soft soils. The rock Tunnel Boring Machine (TBM) is widely applied to hydraulic engineering and railway tunnels in the early stage, and along with the vigorous development of urban rail transit engineering, the TBM construction method is increasingly used in tunnels in urban rail transit sections in rocky regions; the construction method is generally applied to shield type TBM construction under the special surrounding environment and complex geological conditions of urban rail transit, for example, a single shield type TBM is applied to a Chongqing subway, a Qingdao subway and a Shenzhen subway are applied to a double shield type TBM. The shield (shield) is widely used in urban rail transit, road traffic and railway tunnel engineering, and the proportion of the shield in the rail transit tunnel engineering combined with soft soil stratum and soil rock is more than 90%. For a tunnel adopting a TBM method, a single-layer lining structure, a lower inverted arch prefabricated block, an upper molded lining structure, a segment lining structure and the like can be selected; the segment lining structure is generally preferred because of the advantages of strong geological adaptability, high safety, quick construction and the like. For shield tunnels, segment lining structures are generally adopted.
In the construction process of the tunnel boring machine, the prefabricated segment lining ring structure needs to be assembled in the shield tail and then pushed out of the shield tail, so that the excavation diameter of the tunnel boring machine is slightly larger than the outer diameter of the prefabricated segment lining ring structure. In order to prevent the construction of the development machine from causing great influence on the surrounding environment and ensure the tunnel forming quality, the gap between the segment lining ring and the stratum needs to be tightly filled as soon as possible.
The current method for the shield tunnel is that firstly, a synchronous grouting measure is adopted, namely, when the splicing of the prefabricated segment lining ring structure is completed and the shield tail is pushed out, inert grout is filled into the gap through a shield tail grouting port arranged on a shield machine; secondly, a secondary grouting measure is adopted, namely after the assembly of the lining ring structure of the shield tunnel is completed for a period of time, secondary grouting is carried out through hoisting and grouting holes which are pre-buried on the prefabricated segment structure when segment lining blocks are generated for prefabrication.
For the shield type TBM, due to the fact that a shield tail sealing device is not arranged, backfill grouting cannot be carried out in time after tunnel segments are separated from a shield tail and gravel is blown and filled; at present, the conventional method is to apply cement-water glass grout stopping rings through segment grouting holes at a certain distance (usually 10-15 rings of segments) from a shield tail, and then backfill and grout the back of the segment between the two grout stopping rings.
Because of the limitation of objective conditions such as the number and arrangement of grouting openings at the tail of the shield machine, synchronous grouting materials can only fill the gap between the segment lining ring and the stratum as much as possible, and a 'grouting cavity' and a 'block grouting area' inevitably appear behind the segment lining ring, so that secondary grouting becomes necessary for filling the 'grouting cavity' and improving the 'block grouting area'; for a TBM tunnel, segment dislocation, exceeding of tunnel ellipticity and serious tunnel segment water leakage are easily caused by segment not yet grouted under the influence of external load. The number of the grouting holes of the prefabricated pipe piece is limited (generally, one grouting hole is arranged on each prefabricated pipe piece, and the number of the grouting holes is not more than three under special conditions), and the grouting holes are distributed in a dotted manner, so that the problems of 'grouting holes' and 'blocky grouting areas' behind the lining ring of the pipe piece of the shield tunnel are difficult to fundamentally solved, the ring forming quality of the grout stopping ring of the TBM tunnel is difficult to ensure, and the timeliness and the reliability of the back-filling grouting of the pipe piece cannot be ensured.
The method has two ideas for solving the technical problems, one is to improve the shield machine, increase the number of shield tail grouting ports as much as possible, optimize the arrangement of the shield tail grouting ports and add a shield tail sealing device to a TBM; and secondly, improving a grouting device for the stratum behind the prefabricated segment lining. The former is closely related to mechanical equipment and construction method, and has wide application range and great improvement difficulty. Therefore, the improvement of the grouting device for the stratum behind the prefabricated segment lining is a feasible technical measure.
In order to solve the technical problem, the applicant discloses a back grouting device suitable for a shield type TBM tunnel prefabricated segment lining structure in a utility model patent specification with a patent number of ZL 201721706496.X, and the device comprises a hoisting hole embedded part and a slurry outlet pipe. The hoisting hole embedded part is provided with an internal thread section and an extension section, the internal thread section is communicated with the inner edge of the prefabricated pipe piece, the extension section is connected with the annular grouting pipe, and a filter screen is arranged at the joint. The slurry outlet pipes are arranged at intervals along the extension direction of the annular grouting pipe, the inner ends of the slurry outlet pipes are connected with the annular grouting pipe, and the outer ends of the slurry outlet pipes are positioned on the outer edge of the prefabricated pipe piece. The device can guarantee that shield formula TBM section of jurisdiction lining cutting ends thick liquid ring formation quality and the section of jurisdiction backfill slip casting's promptness behind one's back under the prerequisite that does not influence section of jurisdiction structural performance, ensures tunnel segment shaping quality. In order to better meet the requirements of production of prefabricated pipe pieces and assembly and fixation of the grouting device, further intensive research on the back grouting device is needed, so that the back grouting device is more optimized in both aspects of structure and operation convenience.
Disclosure of utility model patent
The utility model aims to solve the technical problem that a grouting device behind one's back suitable for dig into quick-witted method tunnel prefabrication lining cutting section of jurisdiction structure is provided to optimize grouting device's structure, effectively improve grouting device's installation and convenience of use, ensure section of jurisdiction back of the body back and backfill slip casting timeliness, reliability and tunnel section of jurisdiction and assemble the quality.
The utility model provides a technical scheme that its technical problem adopted as follows:
the utility model discloses a slip casting device behind one's back suitable for dig into prefabricated lining cutting section of jurisdiction structure in quick-witted tunnel, including pre-buried hole for hoist built-in fitting in the lining cutting section of jurisdiction, hoop slip casting pipe and grout outlet pipe, the hole for hoist built-in fitting has interior screw thread section and extension section, the outer port of interior screw thread section extends to the inner edge of lining cutting section of jurisdiction, the extension section links to each other with hoop slip casting pipe, grout outlet pipe lays along hoop slip casting pipe extending direction interval, its inner forms with hoop slip casting pipe to be connected, the outer port extends to the outer fringe of lining cutting section of jurisdiction, characterized by: connectors are fixedly arranged on two sides of the outer wall of the extension section of the hoisting hole embedded part, and filter holes which penetrate through the outer wall of the extension section and are communicated with the inner cavity of the extension section are arranged in the connectors at intervals; the annular grouting pipe comprises L-shaped two-way pipes positioned at two ends of the annular direction and arc-shaped grouting pipe sections positioned between the hoisting hole embedded part and the L-shaped two-way pipes, one end of each arc-shaped grouting pipe section at two sides of the hoisting hole embedded part is inserted into the connector, and two adjacent arc-shaped grouting pipe sections, the L-shaped two-way pipes and the adjacent arc-shaped grouting pipe sections are connected in an inserted manner through annular ports of the three-way connectors; the slurry outlet pipe is inserted and installed on each arc-shaped grouting pipe section and the radial port of the L-shaped two-way pipe.
The top of the inner cavity of the pulp outlet pipe is of a conical wall structure, and a cross-shaped pulp outlet is formed in the central part of the conical wall structure.
The pipe wall at the top of the slurry outlet pipe protrudes upwards to form an annular flash, and the annular flash extends upwards to form the outer edge of the lining pipe piece.
The utility model has the advantages that the hoisting hole embedded part and the circumferential grouting pipe are optimized to realize modularization and standardized production, the hoisting hole embedded part, the L-shaped two-way pipe, the arc grouting pipe segment and the grout outlet pipe can be quickly assembled to form a back grouting device through the splicing connection, and are embedded in the prefabricated lining pipe piece, so that the production efficiency of the prefabricated lining pipe piece is effectively improved; the two ends of the annular grouting pipe are L-shaped two-way pipes, so that concrete grout is effectively prevented from flowing into the annular grouting pipe during pouring of the prefabricated lining segment; the grout outlet pipe structure is optimized, and the grout inflow of concrete grout during the pouring of the prefabricated lining segment and the backflow of grout during grouting are effectively prevented by arranging the cross-shaped seam grout outlet and the annular flash; through simplifying grouting device structure behind one's back and grouting operation process behind one's back, guarantee that the section of jurisdiction backfills slip casting behind one's back timeliness, reliability and tunnel segment assemble the quality.
Drawings
The specification includes the following five figures:
FIG. 1 is a schematic plan view of a back grouting device for a tunnel prefabricated lining segment structure of a tunneling machine according to the present invention;
FIG. 2 is a schematic view of the installation of the section of a back grouting device suitable for a tunnel prefabricated lining segment structure by a tunneling method of the utility model;
FIG. 3 is a front view of a lifting hole embedded part in a back grouting device of a tunnel prefabricated lining segment structure by a tunneling machine method;
FIG. 4 is a side view of a hoisting hole embedded part in a back grouting device of a tunnel prefabricated lining segment structure by a tunneling machine method;
FIG. 5 is a schematic view of a three-way joint in a back grouting device for a tunnel prefabricated lining segment structure by a tunneling method;
figure 6 is the utility model is a big appearance drawing of play thick liquid pipe in the slip casting device behind one's back of tunneling machine method tunnel prefabrication lining cutting section of jurisdiction structure.
The component names and corresponding labels are shown in the figure: lifting hole embedded parts 11, internal thread sections 11a, extension sections 11b, lining pipe pieces 20, outer edges 20a, inner edges 20b, arc-shaped grouting pipe sections 31, three-way joints 32, L-shaped two-way pipes 33, connectors 34, filtering holes 35, slurry outlet pipes 40, annular flashes 40a and cross seam slurry outlets 40 b.
Detailed Description
The following detailed description of the present invention will be made with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 and 2, the utility model discloses a slip casting device behind one's back suitable for prefabricated lining cutting section of jurisdiction structure of machine-driven tunnel, including pre-buried hoist hole built-in fitting 11 in lining cutting section of jurisdiction 20, hoop slip casting pipe and play thick liquid pipe 40, hoist hole built-in fitting 11 has internal thread section 11a and extension segment 11b, internal thread section 11a outer port extends to inner edge 20b of lining cutting section of jurisdiction 20, extension segment 11b links to each other with hoop slip casting pipe, play thick liquid pipe 40 is laid along hoop slip casting pipe extending direction interval, its inner forms with hoop slip casting pipe to be connected, the outer port extends to outer fringe 20a of lining cutting 20. Referring to fig. 3 and 4, the lifting hole embedded part 11 has the functions of a lifting hole and a grouting hole, connectors 34 are fixedly arranged on two sides of the outer wall of the extension section 11b, and filtering holes 35 penetrating through the outer wall of the extension section 11b and communicated with the inner cavity of the extension section are arranged in the connectors 34 at intervals. Referring to fig. 2, the circumferential grouting pipe comprises an L-shaped two-way pipe 33 located at two ends of the circumferential direction and arc-shaped grouting pipe segments 31 located between the hoisting hole embedded part 11 and the L-shaped two-way pipe 33, one end of each arc-shaped grouting pipe segment 31 on two sides of the hoisting hole embedded part 11 is connected with a connector 34 in an inserting mode, and the two adjacent arc-shaped grouting pipe segments 31, the L-shaped two-way pipe 33 and the adjacent arc-shaped grouting pipe segments 31 form inserting connection through circumferential ports of three-way connectors 32. The grout outlet pipe 40 is inserted and installed on the radial ports of each arc-shaped grouting pipe segment 31 and the L-shaped two-way pipe 33.
Referring to fig. 2, this practicality is through optimizing the structure of hole for hoist built-in fitting 11 and hoop slip casting pipe, makes it realize modularization, standardized production, and hole for hoist built-in fitting 11, L shape two-way pipe 33, arc slip casting pipe segment 31 and play thick liquid pipe 40 can assemble fast through the plug-in connection and form slip casting device behind one's back to pre-buried in the prefabricated lining cutting pipe piece, effectively improve the production efficiency of prefabricated lining cutting section of jurisdiction. The hoop both ends of hoop slip casting pipe are L shape two-way pipe 33, effectively avoid precast lining segment 20 concrete thick liquid to flow in the hoop slip casting intraductal during pouring.
Referring to fig. 2 and 6, in order to prevent the backflow of the grout during the concrete grout inflow and grouting during the segment casting, the structure of the grout outlet pipe 40 is optimized, that is, the top of the inner cavity of the grout outlet pipe 40 is a conical wall structure, and a cross-shaped grout outlet 40b is formed in the central part of the conical wall structure. The top pipe wall of the slurry outlet pipe 40 protrudes upwards to form an annular flash 40a, and the annular flash 40a extends upwards to form a conical wall structure and an outer edge 20a of the lining segment 20.
The above is only illustrated the utility model is suitable for a basic principle of the slip casting device behind one's back of the prefabricated lining cutting section of jurisdiction structure of tunnel of digging machine method, not will the utility model discloses the limitation show with concrete structure and application scope in show, all corresponding revisions and equivalents that probably are utilized of event all belong to the utility model discloses the patent range who applies for.
Claims (3)
1. Back slip casting device suitable for prefabricated lining cutting section of jurisdiction structure in tunneling machine method tunnel, including pre-buried hole for hoist built-in fitting (11) in lining cutting section of jurisdiction (20), hoop slip casting pipe and grout outlet pipe (40), hole for hoist built-in fitting (11) have internal thread section (11a) and extension section (11b), internal thread section (11a) outer port extends to inner edge (20b) of lining cutting section of jurisdiction (20), extension section (11b) link to each other with hoop slip casting pipe, grout outlet pipe (40) are laid along hoop slip casting pipe extending direction interval, its inner forms with hoop slip casting pipe to be connected, outer port extends to outer fringe (20a) of lining cutting section of jurisdiction (20), characterized by: connectors (34) are fixedly arranged on two sides of the outer wall of the extension section (11b) of the hoisting hole embedded part (11), and filter holes (35) which penetrate through the outer wall of the extension section (11b) and are communicated with the inner cavity of the extension section are arranged in the connectors (34) at intervals; the annular grouting pipe comprises L-shaped two-way pipes (33) positioned at two ends of the annular direction and arc-shaped grouting pipe sections (31) positioned between the hoisting hole embedded part (11) and the L-shaped two-way pipes (33), one ends of the arc-shaped grouting pipe sections (31) on two sides of the hoisting hole embedded part (11) are inserted into the connectors (34), and two adjacent arc-shaped grouting pipe sections (31), the L-shaped two-way pipes (33) and the adjacent arc-shaped grouting pipe sections (31) form insertion connection through annular ports of the three-way joints (32); the grout outlet pipe (40) is inserted and installed on the radial ports of each arc-shaped grouting pipe segment (31) and the L-shaped two-way pipe (33).
2. A back grouting device suitable for a prefabricated lining segment structure of a tunnel by a tunneling machine as claimed in claim 1, wherein: the top of the inner cavity of the pulp outlet pipe (40) is of a conical wall structure, and a cross-shaped pulp outlet (40b) is formed in the central part of the conical wall structure.
3. A back grouting device suitable for a prefabricated lining segment structure of a tunnel by a tunneling machine as claimed in claim 2, wherein: the pipe wall at the top of the slurry outlet pipe (40) protrudes upwards to form an annular flash (40a), and the annular flash (40a) extends upwards to form a conical wall structure and an outer edge (20a) of the lining segment (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920029709.2U CN210118135U (en) | 2019-01-08 | 2019-01-08 | Back grouting device suitable for tunnel prefabricated lining segment structure by excavator method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920029709.2U CN210118135U (en) | 2019-01-08 | 2019-01-08 | Back grouting device suitable for tunnel prefabricated lining segment structure by excavator method |
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| CN210118135U true CN210118135U (en) | 2020-02-28 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111706361A (en) * | 2020-06-04 | 2020-09-25 | 中铁大桥勘测设计院集团有限公司 | Steel frame back filling equipment in tunnel and construction method thereof |
| CN113417663A (en) * | 2021-07-16 | 2021-09-21 | 中铁五局集团有限公司 | Grouting construction method for shield tunnel segment |
| CN115387815A (en) * | 2021-05-20 | 2022-11-25 | 中铁二院工程集团有限责任公司 | Synchronous grouting reinforcement device and synchronous grouting method for assembled tunnel structure |
-
2019
- 2019-01-08 CN CN201920029709.2U patent/CN210118135U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111706361A (en) * | 2020-06-04 | 2020-09-25 | 中铁大桥勘测设计院集团有限公司 | Steel frame back filling equipment in tunnel and construction method thereof |
| CN115387815A (en) * | 2021-05-20 | 2022-11-25 | 中铁二院工程集团有限责任公司 | Synchronous grouting reinforcement device and synchronous grouting method for assembled tunnel structure |
| CN113417663A (en) * | 2021-07-16 | 2021-09-21 | 中铁五局集团有限公司 | Grouting construction method for shield tunnel segment |
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