CN112944038A - Pipe jacking prefabricated part and manufacturing method - Google Patents

Abstract

The application relates to a pipe jacking prefabricated part and a manufacturing method thereof, the pipe jacking prefabricated part comprises a pipe body, one end of the pipe body is provided with a mounting groove along the circumferential direction of the pipe body, the other end of the pipe body is provided with a mounting table, a positioning groove is arranged on the bottom wall of the mounting groove, a flow guide groove is arranged on the bottom wall of the mounting groove along the circumferential direction of the pipe body, a packaging bag is arranged in the positioning groove, the bottom of the positioning groove is provided with a bag breaking part, a guide column with the size consistent with that of the positioning groove is fixedly connected to the mounting table along. In the push pipe work progress, during two pipeline body coupling, guide post on each pipeline body inserts earlier on the pipeline body that has installed, and guide post propelling movement wrapping bag is punctured in the broken bag portion department in the constant head tank, makes the wet mixture waterproof mortar who spills over impress in the guiding gutter, encircles pipeline body a week, and it is inseparable to fill the gap between two adjacent pipeline bodies, and this application has the effect that improves the gap leakproofness between the pipeline body.

Description

Pipe jacking prefabricated part and manufacturing method

Technical Field

The application relates to the field of pipe jacking manufacturing technology, in particular to a pipe jacking prefabricated part and a manufacturing method.

Background

With the rapid development of social economy, urban underground pipeline engineering and the like are gradually increased, and through the development of many years, the construction method is developed from original excavation construction to less excavation or no excavation. The pipe jacking construction is a construction method with few excavation or no excavation, and provides huge convenient conditions for the traffic of urban road.

In the pipe jacking construction process, generally, workers are required to enter the pipe jacking after butt joint installation, and joint positions between the pipe jacking are treated by adopting materials such as mortar and asphalt so as to complete waterproof treatment of the joint positions between the pipe jacking.

With respect to the related art among the above, the inventors consider that the following drawbacks exist: in the using process of the jacking pipes, the waterproof treatment between the jacking pipes is easy to age and fall off, so that the waterproof effect between the jacking pipes is poor.

Disclosure of Invention

In order to improve the waterproof effect between the jacking pipes, the application provides a jacking pipe prefabricated part and a manufacturing method.

In a first aspect, the present application provides a pipe jacking prefabricated member, which adopts the following technical scheme:

the utility model provides a push pipe prefab, includes the pipeline body, the mounting groove has been seted up along self circumference to the one end of pipeline body, the other end of pipeline body is provided with the mount table with the mounting groove adaptation along self circumference, be provided with the constant head tank along pipeline body axial on the diapire of mounting groove, the constant head tank is provided with a plurality ofly along the even interval of pipeline body circumference, be provided with the guiding gutter of the adjacent constant head tank of intercommunication along pipeline body circumference on the diapire of mounting groove, be provided with the wrapping bag that is used for splendid attire wet-mixed waterproof mortar in the constant head tank, the bottom of constant head tank is provided with the broken bag portion that is used for puncturing the wrapping bag, there is the guide post unanimous with the constant head tank size along pipeline body axial.

Through adopting above-mentioned technical scheme, in the push pipe work progress, the pipeline body end to end connection of each tube coupling, and make the one end that the pipeline body has the mount table towards push pipe advancing direction, when two pipeline body coupling, the guide post on each pipeline body inserts earlier on the pipeline body that has installed, propelling movement pipeline body again, make the broken bag portion of guide post propelling movement wrapping bag in the constant head tank puncture, the wet mixture waterproof mortar who spills over from the wrapping bag overflows in the guiding gutter, and in pipeline body propelling movement in-process, extrude the wet mixture waterproof mortar, encircle pipeline body a week, surplus air escapes from the gap between the pipeline body contact surface, the wet mixture waterproof mortar is inseparable with the gap between two adjacent pipeline bodies, and with two pipeline body coupling as an organic whole, effectively improve the gap leakproofness between the pipeline body.

Optionally, the bag breaking portion includes a sharp knife, and the sharp knife is vertically and fixedly connected to the bottom wall of the positioning groove.

Through adopting above-mentioned technical scheme, with sharp sword fixed mounting in the bottom of constant head tank, can make the wrapping bag after being pierced by the sharp sword, begin to flow to the guiding gutter outside the constant head tank from the bottom of constant head tank, make wet-mixed waterproof mortar slowly be full of the guiding gutter, prevent effectively that wet-mixed waterproof mortar from spilling from the pipeline body, improve wet-mixed waterproof mortar's utilization ratio.

Optionally, the section of the sharp knife is cross-shaped, a flow groove is formed in the bottom wall of the positioning groove along the circumferential direction of the sharp knife, and the flow groove is communicated with the diversion groove.

By adopting the technical scheme and the cross sharp knife, the opening of the packaging bag can be increased, the mobility of the wet-mixed waterproof mortar in the positioning groove is improved, the wet-mixed waterproof mortar flows into the flow groove at the bottom of the flow guide groove after being extruded from the packaging bag and flows into the flow guide groove outside the positioning groove from the flow groove, the mobility of the wet-mixed waterproof mortar between the flow guide groove and the positioning groove is ensured, and the filling efficiency of gaps between pipeline bodies is improved.

Optionally, the diapire of guiding gutter sets up along the circumference slope of pipeline body, guiding gutter open-ended one end is kept away from to the diapire of guiding gutter flushes with the diapire of constant head tank, there is the polylith guide plate along the circumference rigid coupling of pipeline body on the mount table, the face that the mount table was kept away from to the guide plate is parallel with the diapire of guiding gutter, the edge that the mount table was kept away from to the guide plate flushes with the terminal surface that the mount table was kept away from to the guide post.

Through adopting above-mentioned technical scheme, establish the diapire of guiding gutter into the tilt state to make the guide post and constant head tank cooperation peg graft the back, at the wet-mixed waterproof mortar through in the guide plate extrusion guiding gutter, finally make and form the slot between the guiding gutter diapire on two pipeline bodies and the guide plate, effectively reduce the wet-mixed waterproof mortar that the gap needs to be used between the filling pipeline body, improve the utilization ratio of wet-mixed waterproof mortar.

Optionally, a pressure relief groove is formed in the mounting table in the axial direction of the pipeline body, a movable block used for sealing the pressure relief groove is arranged in the pressure relief groove in a sliding mode along the depth direction of the pressure relief groove, and an elastic piece used for driving the movable block to move and sealing an opening of the pressure relief groove is arranged in the pressure relief groove.

By adopting the technical scheme, after the wet-mixed waterproof mortar is filled in the gap between the pipeline bodies, the redundant waterproof mortar extrudes the movable block from the pressure relief groove, so that the movable block overcomes the elasticity of the elastic piece and moves towards the pressure relief groove, the redundant mortar is stored by utilizing the pressure relief groove, the wet-mixed waterproof mortar is effectively prevented from overflowing from the seam between the pipeline bodies, and the contact tightness between the pipeline bodies is improved.

Optionally, a connecting ring is fixedly connected to one end, close to the mounting groove, of the outer wall of the pipeline body, a sealing groove is formed in one end, close to the mounting table, of the outer wall of the pipeline body along the circumferential direction of the pipeline body, an overflow groove communicated with the sealing groove is formed in the mounting table, and an air vent communicated with the pressure relief groove is formed in the bottom wall of the sealing groove.

Through adopting above-mentioned technical scheme, after two pipeline body coupling, this external go-between of pipeline cup joints on the outer wall of another pipeline body to gap between two pipeline bodies is filled up fully, and wet mix waterproof mortar flows into the seal groove on the pipeline body outer wall from the overflow launder on the mount table, makes wet mix waterproof mortar use go-between and seal groove as the template, further strengthens the waterproof compactness between two pipeline bodies as an organic whole with go-between and another pipeline body coupling.

Optionally, a pressure relief hole communicated with the inside of the pipeline body is formed in the pressure relief groove, and the pressure relief hole is located on one side, close to the bottom wall of the pressure relief groove, of the vent hole.

Through adopting above-mentioned technical scheme, the gap between the pipeline body is filled up by wet-mixed waterproof mortar to the back is filled up to the pressure release inslot, wet-mixed waterproof mortar promotes the movable block of pressure release inslot to the bottom of pressure release groove, and will expose the pressure release hole from the lateral wall of pressure release groove, and unnecessary wet-mixed waterproof mortar can spill over from the pressure release hole, effectively prevents that wet-mixed waterproof mortar from spilling over from the seam crossing between the pipeline body, further improves the contact compactness between the pipeline body.

In a second aspect, the present application provides a method for manufacturing a push pipe preform, which adopts the following technical scheme:

a manufacturing method of a push pipe prefabricated member comprises the following steps:

s1, preparing concrete, sequentially adding sand, cement, stones, admixture, water and additive, and stirring the concrete uniformly;

s2, building a pipe jacking template, pouring concrete, pouring in layers during pouring, and vibrating and compacting each layer of concrete after single-layer pouring;

and S3, maintaining the jacking pipe, collecting water and plastering the upper end of the jacking pipe before final setting of concrete, covering the jacking pipe with a steam curing cover after water collection, and maintaining and forming the jacking pipe.

Through adopting above-mentioned technical scheme, when batching to the concrete, adopt the kind and the ratio of different admixtures, admixture according to the push pipe construction requirement, suitably promote and change the multiple concrete performance of push pipe pipeline body, with the push pipe again in pouring the in-process, in time vibrate the concrete layering watering and layering, can improve the closely knit degree of concrete, improve the push pipe quality.

Optionally, the pipe jacking maintenance comprises the following steps:

s1, standing for more than or equal to 2 hours at normal temperature after water is collected at the upper end of the top pipe;

s2, after standing, heating the surrounding environment of the top pipe at a heating rate of less than or equal to 20 ℃/h for 2-3.5 h;

s3, after the temperature rise is finished, maintaining the mixture for more than or equal to 3 hours at constant temperature in an environment with the temperature less than or equal to 85 ℃;

and S4, after the constant-temperature maintenance is finished, cooling the surrounding environment of the top pipe, wherein the cooling rate is less than or equal to 25 ℃/h, and the cooling time is more than or equal to 1.5 h.

By adopting the technical scheme, after the jacking pipe is kept still at normal temperature, the concrete has certain strength, and during maintenance of the jacking pipe, the temperature change rate and the temperature are strictly controlled, so that the phenomena of cracks and the like on the surface of the pipeline body of the jacking pipe are effectively prevented, and the quality of the jacking pipe is improved.

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

1. in the pipe-jacking construction process, when two pipeline bodies are connected, the guide columns on the pipeline bodies are firstly inserted into the installed pipeline bodies, the guide columns push the packaging bags to be punctured at the bag-breaking parts in the positioning grooves, so that overflowing wet-mixed waterproof mortar is squeezed into the guide grooves and surrounds the pipeline bodies for a circle, the gap between the two adjacent pipeline bodies is tightly filled, and the gap sealing property between the pipeline bodies is effectively improved;

2. the bottom walls of the diversion trenches are set to be in an inclined state, and after the guide columns are matched and spliced with the positioning grooves, wet-mixed waterproof mortar in the diversion trenches is extruded through the diversion plates, and finally narrow gaps are formed between the diversion trench bottom walls on the two pipeline bodies and the diversion plates, so that the wet-mixed waterproof mortar needed for filling the gaps between the pipeline bodies is effectively reduced, and the utilization rate of the wet-mixed waterproof mortar is improved;

3. after the two pipeline bodies are connected, the connecting ring outside the pipeline bodies is sleeved on the outer wall of the other pipeline body, and the wet-mixed waterproof mortar flows into the sealing groove on the outer wall of the pipeline body from the overflow groove on the mounting table, so that the wet-mixed waterproof mortar takes the connecting ring and the sealing groove as templates, and the connecting ring and the other pipeline body are connected into a whole to further enhance the waterproof tightness between the two pipeline bodies.

Drawings

FIG. 1 is a schematic view of the overall structure of one end of an installation platform of a pipe-jacking prefabricated member according to an embodiment of the present application.

FIG. 2 is a schematic view of a partial cross-sectional structure of one end of a mounting groove of a pipe-jacking preform according to an embodiment of the present application.

Fig. 3 is a partially enlarged schematic view of a portion a in fig. 2.

FIG. 4 is a schematic view of a partial cross-sectional structure of one end of an installation platform of a pipe-jacking preform according to an embodiment of the present application.

Fig. 5 is a partially enlarged schematic view of a portion B in fig. 4.

Description of reference numerals: 1. a pipe body; 2. mounting grooves; 21. positioning a groove; 22. a diversion trench; 3. an installation table; 31. a guide post; 32. a baffle; 4. packaging bags; 5. a bag breaking part; 51. a sharp knife; 52. a flow channel; 6. a movable block; 61. a pressure relief groove; 62. an elastic member; 63. a pressure relief vent; 7. a connecting ring; 71. a sealing groove; 72. an overflow trough; 73. and (4) a vent hole.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses a jacking pipe prefabricated part. Referring to fig. 1 and 2, the pipe jacking prefabricated part comprises a pipe body 1, a circle of mounting groove 2 is inwards recessed along the circumferential direction of the pipe body 1 on one end face of the pipe body 1, and a circle of mounting table 3 matched with the mounting groove 2 in size and depth is protruded from the other end of the pipe body 1. Mounting groove 2 is close to the 1 outside of pipeline body and is close to 1 inboard of pipeline body and all has the side, and perpendicular integrated into one piece has guide post 31 on the mesa that pipeline body 1 was kept away from to mount table 3, has seted up constant head tank 21 along the axis direction of pipeline body 1 on the interior diapire of mounting groove 2, and the size of constant head tank 21 is unanimous with the size of guiding gutter 22, and the degree of depth of constant head tank 21 should be greater than the length of guide post 31. The constant head tank 21 is equipped with a plurality ofly along the even interval of the circumference of pipeline body 1, and in this embodiment, constant head tank 21 is three.

Referring to fig. 2 and 3, a diversion trench 22 is further formed in the mounting groove 2 between two adjacent positioning grooves 21, the diversion trench 22 is annularly formed along the circumferential direction of the pipeline body 1, and the two adjacent positioning grooves 21 are connected together. The packing bag 4 is movably placed in the positioning groove 21, the packing bag 4 can contain fluid adhesives such as wet-mixed waterproof mortar or concrete adhesives, and in the embodiment, the wet-mixed waterproof mortar is filled in the packing bag 4, and the wet-mixed waterproof mortar is prepared and packed on site. The bag breaking part 5 is arranged in the positioning groove 21 to break the packaging bag 4 and discharge the wet-mixed waterproof mortar in the bag.

In this embodiment, the bag breaking portion 5 adopts the sharp knife 51, the cross section of the sharp knife 51 is cross, the sharp knife 51 is made of iron sheet, the sharp knife 51 is pre-embedded and fixed at the central position of the bottom wall of the positioning groove 21, and the tip of the sharp knife 51 faces the opening of the positioning groove 21. The bottom wall of the positioning slot 21 is provided with a circle of flow grooves 52 on the outer side of the sharp knife 51 along the circumferential direction of the positioning slot 21. The bottom wall of the diversion trench 22 is inclined along the length direction of the diversion trench 22, and the end of the bottom wall of the diversion trench 22 far away from the opening of the diversion trench 22 is flush with the bottom wall of one adjacent positioning slot 21 and is communicated with the flow groove 52 on the bottom wall of the positioning slot 21. The one end that the diapire of guiding gutter 22 is nearer apart from guiding gutter 22 opening communicates with another adjacent constant head tank 21 inner wall, and a plurality of guiding gutters 22 on the pipeline body 1 all are along the circumference interval circumference array of pipeline body 1.

Referring to fig. 2 and 4, in order to improve the utilization rate of the wet-mixed waterproof mortar, a guide plate 32 is further integrally formed between every two guide columns 31 on the installation platform 3, one surface of the guide plate 32, which is far away from the installation platform 3, is an inclined surface, and is parallel to the bottom wall of the guide groove 22 corresponding to the other end of the pipeline body 1. The edge of the guide plate 32 far from the mounting table 3 should not be higher than the end face of the guide column 31 far from the mounting table 3, and in this embodiment, the edge of the guide plate 32 far from the mounting table 3 is flush with the end face of the guide column 31 far from the mounting table 3. The edge of the deflector 32 close to the mounting plate 3 is spaced from the nearest guide post 31.

Referring to fig. 4 and 5, in order to further improve the sealing connection effect of the pipeline body 1 at the connection position, a connection ring 7 is coaxially and annularly arranged on the outer wall of the end of the pipeline body 1 with the installation groove 2, and the connection ring 7 is made of steel. The outer wall of the other end of the pipeline body 1 is annularly provided with a circle of sealing groove 71, and after the two pipeline bodies 1 are butted end to end, the connecting ring 7 is sleeved on the outer wall of the other pipeline body 1 and shields the sealing groove 71. An overflow groove 72 communicated into the sealing groove 71 is formed along the outer wall of the pipeline body 1 at one end of the pipeline body 1 with the mounting table 3 and at a position between one end of the guide plate close to the mounting table 3 and the nearest guide column 31. After the diversion trench 22 is filled with the wet-mixed waterproof mortar, the diversion trench 22 enters the sealing trench 71 from the overflow trench 72, and the connection ring 7 and the other pipeline body 1 are sealed and filled.

After the sealing groove 71 is filled, in order to continue to perform a pressure reduction effect on the extruded wet-mixed waterproof mortar, a pressure relief groove 61 is further vertically formed in the mounting table 3 between the guide plate and the guide column 31, and a movable block 6 for opening and closing an opening of the pressure relief groove 61 is connected in the pressure relief groove 61 in a sliding manner in the depth direction of the pressure relief groove 61. The pressure relief groove 61 is provided with an elastic member 62 for pushing the movable block 6 to move toward the opening of the pressure relief groove 61, in this embodiment, the elastic member 62 is a spring, one end of the spring abuts against the bottom wall of the pressure relief groove 61, and the other end abuts against the movable block 6. A vent hole 73 communicating with the pressure relief groove 61 is formed in the seal groove 71, and when the movable block 6 closes the pressure relief groove 61, the side wall of the movable block 6 closes the opening of the vent hole 73 in the pressure relief groove 61.

In order to further provide an overflow pressure relief outlet for the wet-mixed waterproof mortar between the pipeline bodies 1, the side wall of the pressure relief groove 61 is further provided with a pressure relief hole 63 communicated with the inside of the pipeline body 1, and the pressure relief hole 63 is positioned on one side of the vent hole 73 close to the bottom wall of the pressure relief groove 61. After the staff observes that two adjacent pipeline bodies 1 are in stable butt joint, the pressure release hole 63 can be plugged by using the plug, and the wet-mixed waterproof mortar between the pipeline bodies 1 is waited for to be naturally solidified.

The implementation principle of the push pipe prefabricated part in the embodiment of the application is as follows: in the pipe jacking construction process, the pipeline bodies 1 of all pipe joints are connected end to end, and one end of each pipeline body 1 with the installation platform 3 faces the advancing direction of the pipe jacking. When two pipeline bodies 1 are connected, the guide post 31 on each pipeline body 1 is inserted into the installed pipeline body 1 first, and then the pipeline body 1 is pushed, so that the guide post 31 pushes the packaging bag 4 to be punctured at the sharp knife 51 on the bottom wall of the positioning groove 21. The wet-mixed waterproof mortar overflowing from the packaging bag 4 overflows into the diversion trench 22, and in the pushing process of the pipeline body 1, the wet-mixed waterproof mortar is extruded to surround the pipeline body 1 for a circle, redundant air escapes from a gap between contact surfaces of the pipeline body 1, the gap between two adjacent pipeline bodies 1 is tightly filled by the wet-mixed waterproof mortar, and the two pipeline bodies 1 are connected into a whole. Effectively improve the gap leakproofness between the pipeline body 1.

The embodiment of the application also discloses a manufacturing method of the push pipe prefabricated part. The method comprises the following steps:

s1, preparing concrete, and feeding sand, cement, stones, admixture, water and admixture in sequence. The components of each part of the pipe jacking pipe are as follows:

water: 40-50 parts;

cement: 50-60 parts;

sand: 20-30 parts of a solvent;

stone: 10-20 parts;

blending materials: 50-60 parts;

additive: 25-35 parts.

In this embodiment, fly ash is used as the admixture, and a water reducing agent is used as the additive. After the admixture is added, dry mixing is carried out, and then water and the admixture are added for clean mixing.

When a double horizontal shaft forced mixer is adopted, firstly drying the plate for no less than 10 seconds, then adding a mixed solution of water and an additive, and then performing clean mixing for no less than 30 seconds; when a vertical shaft forced mixer is adopted, the plate is dried for no less than 30 seconds, then the mixed liquid of water and the additive is added, and then the mixture is subjected to net mixing for no less than 150 seconds. The net mixing time means that all materials are calculated to start discharging when all materials are put into the stirrer.

The staff judges the final mixture is stirred evenly and the dry humidity degree through visual inspection, manual stirring and other modes, and the mixture is discharged after the mixture is stirred evenly and the dry humidity reaches the standard. The time for placing the mixture should be no more than 30 minutes

S2, building a pipe jacking template, and pouring concrete into the template. During pouring, the feeding cone is inserted into the template, and the outlet of the hopper for sending concrete out of the mixer is moved to the center of the upper opening of the feeding cone, so that the periphery of the inner lower opening of the feeding cone is uniformly fed.

When concrete is poured into the formwork, materials are added in layers, the thickness of each layer of material is controlled to be 250-500 mm, and the thickness of the last layer of material on the upper end face is not less than 250 mm. After the single-layer feeding is finished, the concrete is vibrated and compacted in a layering manner in time.

In the embodiment, an insertion vibrator vertical vibrating forming process is adopted, specifically, a high-frequency insertion vibrating rod can be adopted, the vibration frequency is more than or equal to 12000 times/minute, and the diameter of the vibrating rod is phi 70 mm. Each vibrating rod should be renewed after vibrating 300m3 concrete. In the process of vibrating, the vibration is simultaneously carried out by multiple points, in the embodiment, the vibrating rods are arranged around the pipe die, and the number of the vibrating rods is not less than 4. During vibration, the vibrating rod adopts a fast-inserting slow-lifting mode, the inserting depth is controlled to be 50-100 mm when entering the lower layer, and the distance between inserting points is smaller than the effective acting radius of the vibrator. The insertion point should move in a certain direction to improve the vibrating effect. And vibrating until the surface of the concrete is liquefied and no air bubbles escape, and slowly pulling out the vibrating rod to enable the vibrating hole to heal in time, namely completing the vibrating operation.

The single-layer concrete should be vibrated for less than or equal to 30 minutes, and the collision with the mould and various embedded parts of the pipeline body 1 should be avoided in the vibrating process. After the vibrating operation is finished, the upper end face of the pipeline body 1 is subjected to primary rough surface finishing, so that the end face of the pipeline body 1 is flat. According to the actual situation, the upper end face can be subjected to one-time repeated vibration or tamping and flattening, and then rough surface finishing is performed again.

And S3, maintaining the jacking pipe, collecting water and plastering the upper end of the jacking pipe at least twice before final setting of concrete, and covering a plastic film on the upper end surface of the pipeline body 1 in time after each plastering.

And (5) after the water is collected, covering the top pipe with a steam curing cover, and curing and molding the top pipe. The maintenance work is as follows:

1) standing the upper end of the jacking pipe at normal temperature for more than or equal to 2 hours after water is collected;

2) after standing is finished, heating the surrounding environment of the top pipe at a heating rate of less than or equal to 20 ℃/h for 2-3.5 h;

3) after the temperature rise is finished, maintaining the mixture for more than or equal to 3 hours at constant temperature in an environment with the temperature of less than or equal to 85 ℃;

4) and after the constant-temperature maintenance is finished, cooling the surrounding environment of the top pipe at a cooling rate of less than or equal to 25 ℃/h and for a cooling time of more than or equal to 1.5.

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 (9)

1. A push pipe prefabricated member is characterized in that: comprises a pipeline body (1), wherein a mounting groove (2) is formed in one end of the pipeline body (1) along the circumferential direction, a mounting table (3) matched with the mounting groove (2) is arranged at the other end of the pipeline body (1) along the circumferential direction, positioning grooves (21) are axially arranged on the bottom wall of the mounting groove (2) along the pipeline body (1), a plurality of positioning grooves (21) are uniformly arranged at intervals along the circumferential direction of the pipeline body (1), guide grooves (22) communicated with adjacent positioning grooves (21) are formed in the bottom wall of the mounting groove (2) along the circumferential direction of the pipeline body (1), packaging bags (4) used for containing wet-mixed waterproof mortar are arranged in the positioning grooves (21), bag breaking portions (5) used for breaking the packaging bags (4) are arranged at the bottoms of the positioning grooves (21), and guide columns (31) with the sizes consistent with the positioning grooves (21) are fixedly connected to the mounting table (3) along the axial direction of, the length of the guide column (31) is smaller than the depth of the positioning groove (21).

2. A push bench preform as claimed in claim 1, wherein: the bag breaking part (5) comprises a sharp knife (51), and the sharp knife (51) is vertically and fixedly connected to the bottom wall of the positioning groove (21).

3. A push bench preform as claimed in claim 2, wherein: the cross section of the sharp knife (51) is cross, a flow groove (52) is formed in the bottom wall of the positioning groove (21) along the circumferential direction of the sharp knife (51), and the flow groove (52) is communicated with the diversion groove (22).

4. A push pipe preform according to any of claims 1 to 3, characterized in that: the circumference slope setting of pipeline body (1) is followed to the diapire of guiding gutter (22), the diapire of guiding gutter (22) is kept away from guiding gutter (22) open-ended one end and is flushed with the diapire of constant head tank (21), the circumference rigid coupling along pipeline body (1) on mount table (3) has polylith guide plate (32), the face that mount table (3) were kept away from in guide plate (32) is parallel with the diapire of guiding gutter (22), the edge that mount table (3) were kept away from in guide plate (32) flushes with the terminal surface that mount table (3) were kept away from in guide post (31).

5. A push bench preform as claimed in claim 1, wherein: the pipeline pressure relief device is characterized in that a pressure relief groove (61) is formed in the mounting table (3) in the axial direction of the pipeline body (1), a movable block (6) used for sealing the pressure relief groove (61) is arranged in the pressure relief groove (61) in a sliding mode along the depth direction of the pressure relief groove (61), and an elastic piece (62) used for driving the movable block (6) to move and sealing an opening of the pressure relief groove (61) is arranged in the pressure relief groove (61).

6. A push bench preform as claimed in claim 5, wherein: the coaxial rigid coupling of one end that the outer wall of pipeline body (1) is close to mounting groove (2) has go-between (7), seal groove (71) have been seted up along pipeline body (1) circumference to the one end that the outer wall of pipeline body (1) is close to mount table (3), seted up overflow launder (72) with seal groove (71) intercommunication on mount table (3), offer on the diapire of seal groove (71) air vent (73) with pressure relief groove (61) intercommunication.

7. A push bench preform as claimed in claim 6, wherein: pressure release hole (63) with the inside intercommunication of pipeline body (1) are seted up in pressure release groove (61), pressure release hole (63) are located one side that air vent (73) are close to the diapire of pressure release groove (61).

8. A manufacturing method of a pipe-jacking prefabricated member, comprising the pipe-jacking prefabricated member as claimed in any one of claims 1 to 7, characterized by comprising the following steps:

s1, preparing concrete, sequentially adding sand, cement, stones, admixture, water and additive, and stirring the concrete uniformly;

s2, building a pipe jacking template, pouring concrete, pouring in layers during pouring, and vibrating and compacting each layer of concrete after single-layer pouring;

and S3, maintaining the jacking pipe, collecting water and plastering the upper end of the jacking pipe before final setting of concrete, covering the jacking pipe with a steam curing cover after water collection, and maintaining and forming the jacking pipe.

9. The method for manufacturing a push pipe preform according to claim 8, wherein: the pipe jacking maintenance comprises the following steps:

s1, standing for more than or equal to 2 hours at normal temperature after water is collected at the upper end of the top pipe;

s2, after standing, heating the surrounding environment of the top pipe at a heating rate of less than or equal to 20 ℃/h for 2-3.5 h;

s3, after the temperature rise is finished, maintaining the mixture for more than or equal to 3 hours at constant temperature in an environment with the temperature less than or equal to 85 ℃;

and S4, after the constant-temperature maintenance is finished, cooling the surrounding environment of the top pipe, wherein the cooling rate is less than or equal to 25 ℃/h, and the cooling time is more than or equal to 1.5 h.

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