CN113464722A

CN113464722A - Concrete encapsulation method for large-diameter pipeline

Info

Publication number: CN113464722A
Application number: CN202110707938.7A
Authority: CN
Inventors: 冯海荣; 史立威; 张明; 张冬升
Original assignee: Beijing Bixin Water Co ltd
Current assignee: Beijing Bixin Water Co ltd
Priority date: 2021-06-24
Filing date: 2021-06-24
Publication date: 2021-10-01

Abstract

The application relates to the technical field of pipeline concrete encapsulation, in particular to a large-caliber pipeline concrete encapsulation method, which comprises the following steps of paving a plain concrete layer at the bottom of a groove, and leveling the upper surface of the plain concrete layer; lay a plurality of prefabricated bases along the length direction interval that needs laid the pipeline on plain concrete layer, an organic whole is provided with the arc seat on the prefabricated base, the one side of arc seat prefabricated base dorsad still includes installation reinforcing bar subassembly and hoist and mount pipeline to and steel reinforcement cage in the outside setting of pipeline, the pipeline is placed on the arc seat, then the template is set up to the both sides of pipeline, template and prefabricated base fixed connection connect be used for forming a plurality of subassemblies that compress tightly of the decurrent symmetrical effort of slope to pipeline upper portion both sides in the template concrete pouring forms the encapsulated layer between template and the pipeline. The method has the effect of reducing the movement of the pipeline in the packaging process.

Description

Concrete encapsulation method for large-diameter pipeline

Technical Field

The application relates to the technical field of pipeline concrete encapsulation, in particular to a large-caliber pipeline concrete encapsulation method.

Background

Pipeline concrete is sealed and is protected laying the pipeline in the underground, and the material of pipeline uses plastics, rubber, PVC or steel earlier, and the pipeline is inside for the air to the holistic density of pipeline is less, especially the diameter is greater than the heavy-calibre pipeline of two meters, when carrying out the concrete to the pipeline and seal, makes the pipeline take place the displacement more easily, consequently need fix a position the pipeline, and the restriction pipeline takes place to remove when carrying out the concrete and seal.

Application publication No. CN102776950A discloses a construction method that concrete encapsulates light pipeline, including pouring the concrete layer in the bottom of pipeline, and pre-buried two rows of L type reinforcing bars in the concrete layer, after concrete layer reached the required hardness of design, place the pipeline between two rows of L type reinforcing bars, then set up the package strip of paper used for sealing on the pipeline, the both ends of package strip of paper used for sealing are connected respectively on the L type reinforcing bar of pipeline both sides, it is on light pipeline's surface to encapsulate the strip, then pour concrete to the left and right two sides and the top surface of pipeline again, thereby can reduce upwards floating of pipeline through the package strip of paper used for sealing.

However, the inventor of the above structure considers that the pipe is easy to move laterally during the concrete encapsulation process.

Disclosure of Invention

In order to reduce the movement of the pipeline in the encapsulating process, the application provides a concrete encapsulating method for a large-caliber pipeline.

The application provides a large-diameter pipeline concrete encapsulation method, which adopts the following technical scheme:

a large-diameter pipeline concrete encapsulation method comprises the following steps of paving a plain concrete layer at the bottom of a groove, and leveling the upper surface of the plain concrete layer; lay a plurality of prefabricated bases along the length direction interval that needs laid the pipeline on plain concrete layer, an organic whole is provided with the arc seat on the prefabricated base, the one side of arc seat prefabricated base dorsad still includes installation reinforcing bar subassembly and hoist and mount pipeline to and steel reinforcement cage in the outside setting of pipeline, the pipeline is placed on the arc seat, then the template is set up to the both sides of pipeline, template and prefabricated base fixed connection connect be used for forming a plurality of subassemblies that compress tightly of the decurrent symmetrical effort of slope to pipeline upper portion both sides in the template concrete pouring forms the encapsulated layer between template and the pipeline.

Through adopting the above-mentioned technical scheme, during the use, plain concrete's upper surface levels and can provides more solid bottom surface, reduce the translation that the uneven process of pouring slot bottom caused, make things convenient for subsequent installation simultaneously, the prefabricated base is placed plain concrete's upper surface and with the template mounting, it is more convenient to make prefabricated base's batch production, will compress tightly the subassembly simultaneously, the template, prefabricated base and pipeline carry out fixed connection, the condition that the pipeline takes place the come-up has been reduced, further cooperate the support of arc seat to the pipeline, compress tightly the effort that the subassembly produced the upper portion both sides production symmetry at the pipeline, make the pipeline be located the arc seat, and then pipeline lateral shifting has been reduced.

Preferably, the compressing assembly comprises a tie bar, one end of the tie bar is fixed to the upper portion of the formwork on one side of the pipeline, the other end of the tie bar is fixed to the middle portion of the formwork on the other side of the pipeline, and the middle portion of the tie bar abuts against the position on one side of the upper portion of the pipeline.

Through adopting above-mentioned technical scheme, lacing wire one end is fixed on the template upper portion of one side, and the other end is fixed in the template middle part of opposite side, makes the middle part butt of lacing wire on the pipeline, and then can draw the lacing wire on the pipeline, produces the decurrent effort of slope to the pipeline, compresses tightly the subassembly and installs on the template, can make the more even and quantity that compresses tightly the subassembly setting also more, improves the packing force to the pipeline.

Preferably, both ends of the tie bar are provided with a tensioning piece, the tensioning piece comprises a screw rod, the screw rod is fixedly connected with the end part of the tie bar, and the screw rod penetrates through the template and is in threaded connection with the nut.

Through adopting above-mentioned technical scheme, the one end and the lacing wire fixed connection of screw rod, threaded connection nut on the screw rod move the screw rod to the direction of taut lacing wire through the nut, and then can make things convenient for the tensioning of lacing wire.

Preferably, a plurality of U-shaped grooves with upward openings are formed in the arc-shaped seat, when the pipeline is hoisted, the inner reinforcement cage is manufactured firstly, then the pipeline is inserted into the inner reinforcement cage, the pipeline and the inner reinforcement cage are hoisted simultaneously, the inner reinforcement cage comprises inner longitudinal ribs, and the inner longitudinal ribs are correspondingly placed in the U-shaped grooves.

Through adopting above-mentioned technical scheme, interior steel reinforcement cage adopts the mode that cup joints with the pipeline to interior steel reinforcement cage can be through the mode of making earlier, and the preparation efficiency and the preparation convenience of steel reinforcement cage in improving make, make interior steel reinforcement cage place the U-shaped inslot from the opening part in U-shaped groove.

Preferably, the depths of the U-shaped grooves are equal, and the inner reinforcement cage is supported at the bottom of the U-shaped groove and is concentrically arranged with the pipeline.

Through adopting above-mentioned technical scheme, the degree of depth in U-shaped groove equals, and when the U-shaped inslot was placed to interior steel reinforcement cage, interior steel reinforcement cage received the support of U-shaped groove bottom, makes interior steel reinforcement cage concentric with the pipeline, and then makes the position ratio of interior steel reinforcement cage more accurate, and the installation of steel reinforcement cage in the convenience improves the efficiency of construction.

Preferably, the pre-buried rag bolt in inside of prefabricated base, rag bolt are located the both sides of pipeline, be provided with package rib on the pipeline, package rib passes inner reinforcement cage parcel on the upper portion of pipeline to the both ends of package rib with respectively with the rag bolt fixed connection of pipeline both sides.

Through adopting above-mentioned technical scheme, rag bolt and package muscle strip fixed connection, package muscle strip parcel is on the upper portion of pipeline, and further to pipeline and prefabricated base fixed connection, further improves the fastness that pipeline and prefabricated base are connected through package muscle strip.

Preferably, the fixed L shaped plate that is provided with in tip of package muscle strip, L shaped plate and package muscle strip welded fastening, the pot head of L shaped plate is on rag bolt to the threaded connection has the nut that is used for compressing tightly the L shaped plate on the rag bolt.

Through adopting above-mentioned technical scheme, the L shaped plate is fixed to the tip of package muscle strip, and the nut is pressed on the L shaped plate, can make package muscle strip tensioning through screwing up the nut, further improves the fixed fastness of package muscle strip to the pipeline.

Preferably, the muscle is indulged to reinforcing bar subassembly includes that the bottom indulges muscle, U-shaped muscle and lateral part, the lower surface reservation of prefabricated base has a plurality of notches, a plurality of bottoms of laying earlier on plain concrete layer are indulged the muscle, then indulge the muscle with notch and bottom and correspond when placing prefabricated base again, the middle part level and the bottom of U-shaped muscle are indulged the muscle and are passed through the iron wire ligature and fix, the lateral part is indulged the muscle and is connected the vertical position in both ends of U-shaped muscle.

Through adopting above-mentioned technical scheme, the bottom is indulged the muscle and is placed the upper surface on plain concrete layer earlier, then will prefabricate the base and indulge the muscle with the notch corresponding to the bottom when placing plain concrete layer on, makes things convenient for the bottom to indulge the installation of muscle, and the U-shaped muscle also can make things convenient for the installation of reinforcing bar subassembly simultaneously to improve reinforcing bar subassembly's enhancement efficiency.

Preferably, a trolley is arranged in the pipeline, a heavy object is arranged in the trolley, and the trolley in the pipeline with the pouring completion of the encapsulating layer is pulled into the pipeline with the pouring completion of the encapsulating layer before the pipeline needs to be poured with the encapsulating layer.

Through adopting above-mentioned technical scheme, the inside dolly that sets up of pipeline can improve decurrent pressure to the pipeline when pouring the envelope, further reduces the come-up of pipeline, and the dolly makes things convenient for the removal of dolly in removing the pipeline that need pour the envelope from pouring the pipeline that finishes the envelope to the envelope.

Preferably, connecting holes are reserved at two ends of the prefabricated base, expansion bolts penetrate through the template and are inserted into the connecting holes, and the template is fixed on the prefabricated base through the expansion bolts.

Through adopting above-mentioned technical scheme, leave the connecting hole on the prefabricated base, run through expansion bolts on the template, make expansion bolts insert in the connecting hole, and then template and prefabricated base fixed connection make things convenient for the installation of template.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the prefabricated base is placed on the upper surface of plain concrete and is installed with the template, the compaction assembly, the template, the prefabricated base and the pipeline are fixedly connected, the situation that the pipeline floats upwards is reduced, the pipeline is further supported by the arc-shaped seat, the pipeline is located in the arc-shaped seat, and the lateral movement of the pipeline is further reduced;

2. the inner reinforcement cage is sleeved with the pipeline, so that the manufacturing efficiency and the manufacturing convenience of the inner reinforcement cage can be improved through a mode of manufacturing the inner reinforcement cage in advance, and the inner reinforcement cage is placed into the U-shaped groove from the opening of the U-shaped groove;

3. through rag bolt and package muscle strip fixed connection, package muscle strip parcel is on the upper portion of pipeline, and package muscle strip is further to pipeline and prefabricated base fixed connection, improves the fastness that pipeline and prefabricated base are connected.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present application;

FIG. 2 is an enlarged partial schematic view of portion A of FIG. 1;

FIG. 3 is a schematic illustration of the position of the inner reinforcement cage in an embodiment of the present application;

FIG. 4 is a schematic diagram illustrating the position structure of a prefabricated base in the embodiment of the present application;

FIG. 5 is an enlarged partial schematic view of portion B of FIG. 3;

fig. 6 is a schematic view of the installation structure of the pressing assembly in the embodiment of the present application.

Description of reference numerals: 1. a plain concrete layer; 2. prefabricating a base; 21. connecting holes; 22. a notch; 3. an arc-shaped seat; 31. an arc-shaped surface; 32. a U-shaped groove; 4. a pipeline; 41. anchor bolts; 42. wrapping ribs; 43. an L-shaped plate; 5. a reinforcement assembly; 51. bottom longitudinal ribs; 52. a U-shaped rib; 53. lateral longitudinal ribs; 6. a template; 61. an expansion bolt; 62. a support bar; 7. a compression assembly; 71. stretching a rib; 72. a tension member; 721. a screw; 8. an inner reinforcement cage; 81. inner longitudinal ribs; 82. looping ribs; 9. a trolley; 91. a box body; 92. a wheel; 93. a flexible shaft.

Detailed Description

The present application is described in further detail below with reference to figures 1-6.

The embodiment of the application discloses a concrete encapsulation method for a large-diameter pipeline. Referring to fig. 1, the method comprises the steps of firstly paving a plain concrete layer 1 at the bottom of a paving groove, wherein the plain concrete layer 1 is 2-3cm, carrying out leveling treatment on the upper surface of the plain concrete layer 1, after the plain concrete layer 1 reaches the designed hardness, a prefabricated base 2 is arranged on the upper surface of the plain concrete layer 1, an arc-shaped seat 3 is integrally formed at the middle position of the upper surface of the prefabricated base 2 and the prefabricated base 2, a pipeline 4 is placed on the arc-shaped seat 3, a plurality of prefabricated seats 2 are uniformly laid in the length direction of the pipeline 4, the prefabricated seats 2 are arranged at intervals, reinforcing steel bar components 5 are installed, and two sides of the pipeline 4 are provided with templates 6, the templates 6 are connected on the prefabricated base 2, the templates 6 are connected with a pressing component 7 for pressing the pipeline 4, the pipeline 4 is pressed on the arc-shaped seat 3 through the pressing component 7, and the lateral movement of the pipeline 4 can be reduced by matching the arc-shaped seat 3.

Referring to fig. 2 and 3, the prefabricated base 2 is a long cuboid, connecting holes 21 are formed in two ends of the prefabricated base 2, when the formwork 6 is installed, one surface of the formwork 6 facing the pipeline 4 abuts against the end of the prefabricated base 2, expansion bolts 61 are arranged on the formwork 6 in a penetrating mode, one ends of the expansion bolts 61 penetrate through the formwork 6 and then are inserted into the connecting holes 21, then the expansion bolts 61 are screwed, the formwork 6 is fixedly connected with the prefabricated base 2, the formworks 6 on two sides of the pipeline 4 are installed at two ends of the prefabricated base 2 respectively, and the length direction of the prefabricated base 2 is perpendicular to the length direction of the pipeline 4. A plurality of notches 22 are formed in the lower surface of the prefabricated base 2, and the notches 22 are arranged downwards. The arc seat 3 is located the upper surface of prefabricated base 2 to the one side that the arc seat 3 is back to prefabricated base 2 is arcwall face 31, and the radius that arcwall face 31 is the arc equals the radius of pipeline 4. A plurality of U-shaped grooves 32 are formed in the arc-shaped surface 31, the openings of the U-shaped grooves 32 are vertically upward, the U-shaped grooves 32 are uniformly distributed along the arc line of the arc-shaped surface 31, and the depths of the U-shaped grooves 32 are equal.

Referring to fig. 4, the reinforcement assembly 5 includes a bottom longitudinal rib 51, a U-shaped rib 52 and a side longitudinal rib 53, the bottom longitudinal rib 51 and the side longitudinal rib 53 are parallel to the length direction of the pipeline 4, the bottom longitudinal rib 51 is installed inside the notch 22 before the prefabricated base 2 is installed or after the prefabricated base 2 is installed, before the prefabricated base 2 is installed, the bottom longitudinal ribs 51 may be placed on the plain concrete layer 1 at intervals, and then the notches 22 on the prefabricated base 2 correspond to one bottom longitudinal rib 51, respectively, so that the prefabricated base 2 is placed on the plain concrete; when the bottom longitudinal rib 51 is installed after the prefabricated base 2 is installed, the bottom longitudinal rib 51 may be inserted into the notch 22. The whole bending type U-shaped rib 52 of U-shaped rib 52 forms the U-shape to the middle part level of U-shaped rib 52 sets up, and the vertical setting in both ends of U-shaped rib 52, the position at U-shaped rib 52 middle part is kept flat to a plurality of bottoms and is indulged on muscle 51, and indulges muscle 51 with the bottom and can the iron wire ligature, and U-shaped rib 52 indulges the length direction parallel arrangement of muscle 51 along the bottom. The plurality of lateral longitudinal ribs 53 are arranged in the vertical direction, and the lateral longitudinal ribs 53 and the vertical portions at the two ends of the U-shaped rib 52 are bound and fixed by iron wires.

Referring to fig. 2 and 3, the pipeline 4 is hoisted to the arc-shaped seat 3, the inner reinforcement cage 8 is sleeved on the outer side of the pipeline 4, the inner reinforcement cage 8 comprises a plurality of inner longitudinal ribs 81 and ring ribs 82, and the inner reinforcement cage 8 is manufactured by a reinforcement cage seam welder to weld and fix the ring ribs 82 and the inner longitudinal ribs 81. Interior steel reinforcement cage 8 keeps flat subaerially, then pipeline 4 inserts interior steel reinforcement cage 8 from the one end of interior steel reinforcement cage 8, then hoist interior steel reinforcement cage 8 and pipeline 4 simultaneously, interior steel reinforcement cage 8 and pipeline 4 are put to arc seat 3 simultaneously slowly, and when interior steel reinforcement cage 8 contacts arc seat 3, with interior longitudinal reinforcement 81 corresponding to the U-shaped inslot 32 of upwards opening, then continue to whereabouts pipeline 4 again, when pipeline 4 falls on arc seat 3, interior steel reinforcement cage 8 supports the bottom at U-shaped groove 32, and be in concentric state between interior steel reinforcement cage 8 and the pipeline 4, thereby make things convenient for interior steel reinforcement cage 8 and pipeline 4's location, guarantee the clearance between interior steel reinforcement cage 8 and the pipeline 4 simultaneously.

Referring to fig. 5, an anchor bolt 41 is arranged inside the prefabricated base 2, and the anchor bolt 41 is arranged in the prefabricated base 2 in an embedded manner. Rag bolt 41's one end is stretched out from prefabricated base 2's upper surface, it is provided with package muscle strip 42 to be located pipeline 4, package muscle strip 42 adopts the diameter to be 5 mm's reinforcing bar preparation, package muscle strip 42 passes and wraps the upper portion at pipeline 4 from interior reinforcing bar cage 8, the both ends of package muscle strip 42 extend to rag bolt 41's position, all weld a L shaped plate 43 at two tip of package muscle strip 42, one side cover of L shaped plate 43 is on rag bolt 41, threaded connection nut on rag bolt 41, extrude L shaped plate 43 to prefabricated base 2's direction through the nut, and then can make the firm fastening of package muscle strip 42 on pipeline 4.

Referring to fig. 6, a support bar 62 is provided at the upper end of the formworks 6, the support bar 62 is provided perpendicular to the formworks 6, and both ends of the support bar 62 are fixedly connected to the two formworks 6 by means of screw nuts. The pressing assembly 7 comprises a tie bar 71 and two tension pieces 72 arranged at two ends of the tie bar 71, the tie bar 71 is made of steel bars with the diameter of 5mm, one tension piece 72 is positioned at the upper part of one template 6, and the other tension piece 72 is positioned at the middle part of the other template 6. The tension member 72 is attached to the formwork 6 and the tie bars 71 pass through the inner reinforcement cage 8 to tie to the upper side of the duct 4. The pressing assemblies 7 are multiple, the pressing assemblies 7 are arranged along the length direction of the pipeline 4, and the lacing bars 71 connected with two adjacent pressing assemblies 7 are symmetrically arranged on two sides of the pipeline 4, so that pressing force generated by the pressing assemblies 7 on the pipeline 4 is distributed on two sides of the upper part of the pipeline 4, and the installation firmness of the pipeline 4 is further improved. The tension member 72 includes a screw 721 and a nut, one end of the screw 721 may be welded to the end of the tie bar 71, or the end of the tie bar 71 may be bent to be hooked to the end of the screw 721, and the screw 721 penetrates the mold plate 6 and is threadedly coupled to the nut, so that the tie bar 71 is tightened on the pipe 4 when the nuts at both ends of the tie bar 71 are tightened.

Referring to fig. 6, a trolley 9 is arranged inside the pipeline 4, the trolley 9 comprises a box body 91 and wheels 92, the wheels 92 are distributed at the bottom and two sides of the rib body, the box body 91 is used for loading heavy objects, the trolleys 9 are arranged in a plurality along the length direction of the pipeline 4, the adjacent trolleys 9 are connected through flexible shafts 93, and after the pipeline 4 is laid and before an encapsulating layer located on the outer side of the pipeline 4 is poured, the trolleys 9 are moved into the pipeline 4 to be poured. During the use, a plurality of trolleys 9 are stored in the poured pipeline 4 temporarily, then the trolleys 9 are pulled along the length direction of the pipeline 4, the trolleys 9 move into the pipeline 4 needing to be poured and wrapped with a layer, the weight is added to the interior of the pipeline 4 through the trolleys 9, the pipeline 4 is further pressed on the arc-shaped seat 3, the movement of the pipeline 4 is reduced, then concrete is poured between the outer side of the pipeline 4 and the template 6 to form a wrapped layer, the poured wrapped layer concrete is located between the templates 6 due to the relatively fixed connection of the pipeline 4, the template 6 and the prefabricated base 2, therefore, the whole formed by the pipeline 4, the template 6 and the prefabricated base 2 cannot move, meanwhile, the pipeline 4 is under the action of the pressing assembly 7, the arc-shaped seat 3 and the wrapping rib strips 42, and the connection of the pipeline 4 relative to the prefabricated base 2 is firmer.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A large-diameter pipeline concrete encapsulation method is characterized in that: the method comprises the following steps of paving a plain concrete layer (1) at the bottom of a groove, and flattening the upper surface of the plain concrete layer (1); a plurality of prefabricated bases (2) are paved on the plain concrete layer (1) at intervals along the length direction of the pipeline (4) to be paved, the prefabricated base (2) is integrally provided with an arc-shaped seat (3), one surface of the arc-shaped seat (3) back to the prefabricated base (2) is arc-shaped, the prefabricated base further comprises an installation steel bar component (5) and a hoisting pipeline (4), and an inner reinforcement cage (8) is arranged on the outer side of the pipeline (4), the pipeline (4) is placed on the arc-shaped seat (3), then, erecting templates (6) on two sides of the pipeline (4), fixedly connecting the templates (6) with the prefabricated base (2), a plurality of pressing components (7) which are used for forming symmetrical acting force inclining downwards on two sides of the upper part of the pipeline (4) are connected on the template (6), and pouring concrete between the template (6) and the pipeline (4) to form an encapsulating layer.

2. The concrete encapsulating method for the large-caliber pipeline as claimed in claim 1, wherein: the pressing assembly (7) comprises a tie bar (71), one end of the tie bar (71) is fixed to the upper portion of the formwork (6) on one side of the pipeline (4), the other end of the tie bar (71) is fixed to the middle portion of the formwork (6) on the other side of the pipeline (4), and the middle portion of the tie bar (71) abuts against the position on one side of the upper portion of the pipeline (4).

3. The concrete encapsulating method for the large-caliber pipeline as claimed in claim 2, wherein: the two ends of the tie bar (71) are respectively provided with a tensioning piece (72), each tensioning piece (72) comprises a screw (721), the screws (721) are fixedly connected with the ends of the tie bar (71), and the screws (721) penetrate through the template (6) and are in threaded connection with nuts.

4. The concrete encapsulating method for the large-caliber pipeline as claimed in claim 1, wherein: seted up a plurality of ascending U-shaped grooves of opening (32) on arc seat (3), during hoist and mount pipeline (4), steel reinforcement cage (8) in the preparation earlier, then insert the inside of interior steel reinforcement cage (8) with pipeline (4), pipeline (4) and interior steel reinforcement cage (8) hoist and mount simultaneously, interior steel reinforcement cage (8) are including interior muscle (81) of indulging, interior muscle (81) of indulging correspond and place in U-shaped groove (32).

5. The concrete encapsulating method for the large-caliber pipeline as claimed in claim 4, wherein the concrete encapsulating method comprises the following steps: the depths of the U-shaped grooves (32) are equal, and the inner reinforcement cage (8) is supported at the bottom of the U-shaped grooves (32) and is arranged concentrically with the pipeline (4).

6. The concrete encapsulating method for the large-caliber pipeline as claimed in claim 1, wherein: the embedded anchor bolt (41) of inside of prefabricated base (2), anchor bolt (41) are located the both sides of pipeline (4), be provided with package rib (42) on pipeline (4), package rib (42) pass inner reinforcement cage (8) parcel on the upper portion of pipeline (4) to the both ends of package rib (42) with respectively with anchor bolt (41) fixed connection of pipeline (4) both sides.

7. The concrete encapsulating method for the large-caliber pipeline as claimed in claim 6, wherein the concrete encapsulating method comprises the following steps: the end part of each wrapping rib (42) is fixedly provided with an L-shaped plate (43), the L-shaped plates (43) are welded and fixed with the wrapping ribs (42), one end of each L-shaped plate (43) is sleeved on each foundation bolt (41), and each foundation bolt (41) is connected with a nut used for pressing the L-shaped plate (43) in a threaded mode.

8. The concrete encapsulating method for the large-caliber pipeline as claimed in claim 7, wherein: muscle (53) are indulged including bottom longitudinal bar (51), U-shaped muscle (52) and lateral part to reinforcing bar subassembly (5), the lower surface reservation of prefabricated base (2) has a plurality of notches (22), muscle (51) are indulged to a plurality of bottoms of laying earlier on plain concrete layer (1), then correspond notch (22) and bottom longitudinal bar (51) when placing prefabricated base (2) again, muscle (51) are indulged with the bottom to the middle part level of U-shaped muscle (52) and bottom longitudinal bar (51) are fixed through the iron wire ligature, the lateral part is indulged muscle (53) and is connected at the vertical position in both ends of U-shaped muscle (52).

9. The concrete encapsulating method for the large-caliber pipeline as claimed in claim 1, wherein: the pipeline sealing device is characterized in that a trolley (9) is arranged in the pipeline (4), a heavy object is arranged in the trolley (9), and the trolley (9) in the pipeline (4) with the sealing layer poured is pulled into the pipeline (4) with the sealing layer poured before the sealing layer is required to be poured in the pipeline (4).

10. The concrete encapsulating method for the large-caliber pipeline as claimed in claim 1, wherein: connecting holes (21) are reserved at two ends of the prefabricated base (2), expansion bolts (61) penetrate through the template (6), the expansion bolts (61) are inserted into the connecting holes (21), and the template (6) is fixed on the prefabricated base (2) through the expansion bolts (61).