Pipe-jacking pipe joint mid-partition wall with grouting holes and construction method of pipe-jacking pipe joint mid-partition wall

Abstract

The invention provides a pipe-jacking pipe joint mid-partition wall with grouting holes and a construction method thereof. The pipe-jacking pipe joint mid-partition wall comprises a pipe joint body and a mid-partition wall guide wall. The pipe joint body is defined by a top plate, side walls on the two sides and a bottom plate. The middle partition wall guiding wall is located on the top plate, a plurality of grouting holes are formed in the side face of the middle partition wall guiding wall in the jacking direction of the jacking pipe, a plurality of grout outlet holes are correspondingly formed in the bottom face of the middle partition wall guiding wall, a grouting pipe is communicated between each grouting hole and the corresponding grout outlet hole, and each grouting pipe is used for grouting a wall body pouring area below the middle partition wall guiding wall. The upper part of the wall body pouring area is filled and compacted; and a reinforcing mesh is arranged between the mid-partition wall guide wall and the bottom plate. The grouting pipe is arranged between the side face and the bottom face of the mid-partition guide wall, grouting is conducted from the upper portion to the wall body pouring area below the mid-partition guide wall, the upper portion of the wall body pouring area is filled and compacted, and therefore the sealing performance of the mid-partition branch bin can be effectively guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of jacking pipe construction, in particular to a jacking pipe section intermediate partition wall with grouting holes and a construction method thereof. Background Art

[0002] At present, pipe jacking, as a trenchless construction technology, is gradually being used more and more in urban construction because it is not affected by ground traffic conditions and shallow buried pipelines. Due to the different use requirements of various professions and relevant specifications, different pipelines in the pipe gallery after the completion of pipe jacking construction are usually set up in separate compartments. In order to facilitate the arrangement of mechanical pipelines and the transportation of unearthed during the pipe jacking process, the middle partition wall is often reserved during the production of the pipe segment. After the jacking is completed, the middle partition wall is constructed by the post-pouring method to separate the compartments of the pipe gallery. However, due to the limitation of the top plate of the pipe segment, the top concrete pouring of the middle partition wall constructed by the post-pouring method is usually difficult to be dense, forming a honeycomb surface, which affects the appearance quality of the middle partition wall and the sealing effect of the compartments. Summary of the invention

[0003] In view of this, the present invention proposes a pipe jacking section middle partition wall with grouting holes and a construction method, aiming to solve the problem that the top concrete pouring of the middle partition wall in the existing pipe jacking compartment construction is difficult to be dense, thus affecting the sealing of the compartment.

[0004] In one aspect, the present invention provides a pipe jacking segment intermediate partition wall with grouting holes, comprising: a pipe segment body and an intermediate partition wall guide wall; wherein, The pipe segment body is surrounded by a top plate, side walls on both sides and a bottom plate; a steel mesh is arranged between the middle partition wall and the bottom plate; The middle partition wall lead wall is located on the top plate, and a plurality of grouting holes are arranged on the side of the middle partition wall lead wall along the jacking direction of the jacking pipe, and a plurality of grouting holes are arranged correspondingly on the bottom surface of the middle partition wall lead wall. A grouting pipe is connected between each of the grouting holes and the grouting holes, and each of the grouting pipes is used to grout into the wall casting area below the middle partition wall lead wall to fill the upper part of the dense wall casting area.

[0005] Furthermore, in the above-mentioned intermediate partition wall of the jacking pipe section with grouting holes, the grouting holes and the slurry outlet holes in the intermediate partition wall are evenly arranged along the jacking direction of the jacking pipe.

[0006] Furthermore, in the above-mentioned partition wall of the top pipe section with grouting holes, the steel mesh comprises: a plurality of vertically arranged longitudinal steel bars and transverse steel bars; wherein, Tension bars are also arranged between the longitudinal steel bars and the transverse steel bars.

[0007] Furthermore, in the above-mentioned intermediate partition wall of the jacking pipe section with grouting holes, a plurality of first steel bar connectors are evenly arranged on the lower surface of the intermediate partition wall guide wall along the jacking direction of the jacking pipe.

[0008] Furthermore, in the above-mentioned top pipe segment partition wall with grouting holes, a plurality of second steel bar connectors are pre-embedded on the bottom plate at positions corresponding to the first steel bar connectors, and the second steel bar connectors cooperate with the first steel bar connectors to install the longitudinal steel bars in the steel mesh in the partition wall.

[0009] Furthermore, in the partition wall of the jacking pipe section with grouting holes, the arrangement interval of each grouting pipe along the jacking direction of the jacking pipe is 0.5m-1m.

[0010] The top pipe section middle partition wall with grouting holes in the present invention is configured with a grouting pipe between the side and bottom surfaces of the middle partition wall lead wall to inject grout from the top to the wall casting area below the middle partition wall lead wall to fill the upper part of the dense wall casting area. This can effectively avoid the problem of honeycombed surface formation on the top of the middle partition wall due to pores generated during casting, thereby effectively ensuring the sealing of the middle partition wall compartments.

[0011] On the other hand, the present invention also proposes a construction method for a jacking pipe segment intermediate partition wall with grouting holes, comprising: step 1, laying a steel mesh between the intermediate partition wall lead wall and the bottom plate; Step 2, install the middle partition wall formwork on both sides of the laid steel mesh; Step 3, pouring concrete into the template through the concrete pouring hole reserved at the top of the middle partition wall template until the concrete in the middle partition wall template is densely filled; Step 4, close the concrete pouring hole, wait for the concrete strength to reach the demolding strength, and use the interval grouting method to inject grout from the grouting pipe in the middle partition wall into the middle partition wall until the slurry strength reaches the preset requirement; Step 5: Remove the concrete formwork, clean the remaining slurry at the grouting holes, and complete the construction of the partition wall in the pipe section.

[0012] Furthermore, in the above-mentioned construction method of the partition wall in the top pipe section with grouting holes, before the step 1, it also includes: Install the first steel bar connector and the second steel bar connector on the lower surface of the middle partition wall lead wall and the bottom plate surface. After the jacking pipe is completed, clean the debris in the pipe body, clean the lower surface of the middle partition wall lead wall and the bottom plate surface, and expose the first steel bar connector and the second steel bar connector at the connecting part.

[0013] Furthermore, in the above-mentioned construction method of the partition wall in the top pipe section with grouting holes, in the step 2, tension screws are inserted between the concrete formworks on both sides, and the main ribs of the formwork are installed on the outer side of the concrete formworks, and the secondary ribs of the formwork are installed on the tension screws, so that the main ribs of the formworks and the secondary ribs of the formworks are vertically arranged.

[0014] Furthermore, in the above-mentioned construction method of the partition wall in the top pipe section with grouting holes, in the step 4, grouting is performed once for at least one grouting hole, and after the slurry strength of the first grouting reaches a preset strength, secondary grouting is started for the remaining grouting holes until the grouting of all the grouting holes is completed.

[0015] The present invention can effectively improve the steel bar construction quality of the middle partition wall of the top pipe section and ensure the concrete thickness and appearance quality by pouring concrete between the formworks on both sides of the middle partition wall and then injecting grouting from the top to the wall casting area below the middle partition wall lead wall to fill the upper space of the dense wall casting area. The post-grouting can effectively fill the gap between the post-cast concrete and the middle partition wall lead wall to ensure the sealing effect of the pipe gallery compartment, thereby improving the safety of operation and maintenance of each compartment pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings: Figure 1 A schematic structural diagram of a partition wall in a jacking pipe section with grouting holes provided in an embodiment of the present invention; Figure 2 A schematic diagram of the construction structure of a partition wall in a jacking pipe section with grouting holes provided in an embodiment of the present invention; Figure 3 for Figure 2 AA section view in. DETAILED DESCRIPTION

[0017] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to be able to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features described in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0018] Device Example: See also Figure 1-Figure 3The intermediate partition wall of the jacking pipe segment with grouting holes in the embodiment of the present invention comprises: a pipe segment body 1 and an intermediate partition wall lead wall 2; wherein the pipe segment body 1 is surrounded by a top plate 11, side walls 12 on both sides and a bottom plate 13; the intermediate partition wall lead wall 2 is located on the top plate 11, and a plurality of grouting holes 21 are arranged on the side of the intermediate partition wall lead wall 2 along the jacking direction of the jacking pipe, and a plurality of grouting holes 23 are arranged correspondingly on the bottom surface of the intermediate partition wall lead wall 2, and a grouting pipe 22 is connected between each of the grouting holes 21 and the grouting holes 23, and each of the grouting pipes 22 is used for grouting into the wall casting area below the intermediate partition wall lead wall 2 to fill the upper part of the dense wall casting area; a steel mesh 3 is arranged between the intermediate partition wall lead wall 2 and the bottom plate 13.

[0019] Specifically, the pipe segment body 1 may be a rectangular concrete structure formed by a top plate 11 , side walls 12 on both sides, and a bottom plate 13 .

[0020] The middle partition wall lead wall 2 and the pipe segment body 1 are prefabricated together, and a grouting pipe 22 is connected between each grouting hole 21 and the corresponding grouting hole 23 in the middle partition wall lead wall 2. In other words, a plurality of grouting pipes 22 are evenly arranged on the side of the middle partition wall lead wall 2 along the jacking direction of the jacking pipe. The grouting pipe 22 can be a right-angle bent pipe, and its inlet end is connected to the grouting hole 21 at the top of the side of the middle partition wall lead wall 2, and the outlet end is connected to the grouting hole 23 at the bottom of the side of the middle partition wall lead wall 2.

[0021] Preferably, in this embodiment, the grouting pipes 22 are arranged at intervals of 0.5m-1m along the jacking direction of the jacking pipe to ensure the compactness of the grouting.

[0022] Preferably, the grouting holes 21 and the grouting holes 23 in the middle partition wall guide wall 2 are evenly arranged along the jacking direction of the jacking pipe.

[0023] See also Figure 2 , the steel mesh 3 includes: a plurality of vertically arranged longitudinal steel bars 31 and transverse steel bars 32; wherein, a tension bar is further arranged between the longitudinal steel bars 31 and the transverse steel bars 32. In order to arrange the steel mesh 3 between the middle partition wall lead wall 2 and the bottom plate 13, a plurality of first steel bar connectors 33 are evenly arranged on the lower surface of the middle partition wall lead wall 2 along the jacking direction of the jacking pipe. A plurality of second steel bar connectors 34 are pre-embedded at positions corresponding to the first steel bar connectors 33 on the bottom plate 13, and the second steel bar connectors 34 cooperate with the first steel bar connectors 33 to install the longitudinal steel bars 31 of the steel mesh 3 in the middle partition wall. wherein, the spacing between the first steel bar connectors 33 and the second steel bar connectors 34 along the jacking direction of the jacking pipe is determined according to the spacing between the longitudinal steel bars 31 of the middle partition wall in the design drawings. The first steel bar connectors 33 and the second steel bar connectors 34 can both be steel bar threaded sleeves.

[0024] It can be obviously concluded from the above that the top pipe section middle partition wall with grouting holes provided in this embodiment, by arranging a grouting pipe between the side and bottom of the middle partition wall lead wall, so as to inject grout from the top to the wall casting area below the middle partition wall lead wall to fill the upper part of the dense wall casting area, can effectively avoid the problem of honeycombed surface formation on the top of the middle partition wall due to pores generated during casting, thereby effectively ensuring the sealing of the middle partition wall compartments.

[0025] Method Example: See also Figure 2 The present invention also provides a construction method for a partition wall in a jacking pipe section with a grouting hole, which is characterized by comprising the following steps: Step 1: Arrange the steel mesh 3 between the middle partition wall 2 and the bottom plate 13.

[0026] Specifically, before step 1, the method further includes: The first steel bar connector 33 and the second steel bar connector 34 are installed on the lower surface of the middle partition wall guide wall 2 and the surface of the bottom plate 13. After the jacking pipe is completed, the debris in the pipe segment body 1 is cleaned, the lower surface of the middle partition wall guide wall 2 and the surface of the bottom plate are cleaned, and the first steel bar connector 33 and the second steel bar connector 34 are exposed at the joint.

[0027] During specific implementation, the longitudinal reinforcement 31 of the middle partition wall is installed through the first reinforcement connector 33 and the second reinforcement connector 34, and the transverse reinforcement 32 and the tensioning bars of the middle partition wall are installed by binding according to the design drawings.

[0028] Step 2: Install the middle partition wall formwork on both sides of the laid steel mesh 3.

[0029] In specific implementation, a tension screw 43 is inserted between the concrete templates 4 on both sides, and a template main rib 42 is installed on the outer side of the concrete template 4, and a template secondary rib 44 is installed on the tension screw 43, so that the template main rib 42 and the template secondary rib 44 are vertically arranged. In this embodiment, the height of the template is lower than the grouting pipe 22 in the middle partition wall lead wall 2 to avoid blocking the grouting pipe 22.

[0030] Step 3, pouring concrete into the template through the concrete pouring hole 41 reserved at the top of the middle partition wall template until the middle partition wall template is densely filled with concrete.

[0031] During specific implementation, the concrete pouring equipment can maintain a certain pressure to pour concrete into the formwork until the concrete in the middle partition wall formwork is densely filled.

[0032] Step 4, close the concrete pouring hole 41, wait for the concrete strength to reach the demolding strength, and use the interval grouting method to inject grout from the grouting pipe 22 in the middle partition wall 2 into the middle partition wall until the slurry strength reaches the preset requirement.

[0033] During specific implementation, after the concrete in the partition wall formwork is densely filled, the concrete pouring hole 41 is closed, and the concrete strength is waited to reach the demolding strength, and pressure grouting is performed from the grouting pipe 22 in the middle partition wall 2 into the middle partition wall. The grouting uses cement slurry or a mixed slurry of cement and other materials, and the grouting adopts the interval grouting method.

[0034] The interval grouting method in this embodiment refers to performing grouting once for at least one grouting hole 21, and after the slurry strength of the first grouting reaches a preset strength, secondary grouting is performed on the remaining grouting holes 21 until the grouting of all grouting holes 21 is completed. The preset strength of the grouting liquid can be determined according to actual conditions, for example, it can be 60-80%.

[0035] That is to say, grouting can be performed once at intervals of one grouting hole 21, or once at intervals of multiple grouting holes 21, and then grouting can be performed twice on the remaining grouting holes 21. Interval grouting is used to discharge gas in the grouting liquid and effectively avoid the formation of pores in the middle partition wall.

[0036] The following is a specific example: first grouting the first grouting hole 21, the third grouting hole 21, the fifth grouting hole 21... until the grouting holes 21 adjacent to the grouting hole 21 on both sides of the grouting hole 21 being grouted flow out slurry, and after the slurry strength of the first grouting reaches 70% of the design strength, the second grouting begins, that is, grouting the second grouting hole 21, the fourth grouting hole 21, the sixth grouting hole 21... until the grouting of all the grouting holes 21 is completed. The first, second, third... here refer to the numbers of the grouting holes 21.

[0037] Step 5, remove the concrete formwork 4, clean the residual slurry at the grouting hole 21, and complete the construction of the partition wall in the pipe segment.

[0038] The related parts of the method embodiment and the above-mentioned device embodiment can be referred to each other and will not be described in detail here.

[0039] In summary, the construction method of the middle partition wall of the top pipe section with grouting holes provided by the present invention, after pouring concrete between the formworks on both sides of the middle partition wall, grouting is performed from the top to the wall casting area below the middle partition wall lead wall to fill the upper space of the dense wall casting area. It can effectively improve the steel bar construction quality of the middle partition wall of the top pipe section, ensure the concrete thickness and appearance quality, and effectively fill the gap between the post-cast concrete and the middle partition wall lead wall through post-grouting, thereby ensuring the sealing effect of the pipe gallery compartment, thereby improving the safety of operation and maintenance of each compartment pipeline.

[0040] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A pipe jacking section intermediate partition wall with grouting holes, characterized in that: include: The pipe segment body and the middle partition wall; among them, The pipe segment body is surrounded by a top plate, side walls on both sides and a bottom plate; a steel mesh is arranged between the middle partition wall and the bottom plate; The middle partition wall lead wall is located on the top plate, and a plurality of grouting holes are arranged on the side of the middle partition wall lead wall along the jacking direction of the jacking pipe, and a plurality of grouting holes are arranged correspondingly on the bottom surface of the middle partition wall lead wall. A grouting pipe is connected between each of the grouting holes and the grouting holes, and each of the grouting pipes is used to grout into the wall casting area below the middle partition wall lead wall to fill the upper part of the dense wall casting area.

2. The pipe-top segment intermediate partition wall with grouting holes according to claim 1 is characterized in that: The grouting holes and the grouting outlet holes in the guide wall of the middle partition wall are evenly arranged along the jacking direction of the jacking pipe.

3. The pipe jacking section intermediate partition wall with grouting holes according to claim 1 is characterized in that: The steel mesh comprises: a plurality of vertically arranged longitudinal steel bars and transverse steel bars; wherein, Tension bars are also arranged between the longitudinal steel bars and the transverse steel bars.

4. The pipe jacking section intermediate partition wall with grouting holes according to claim 1 is characterized in that: A plurality of first steel bar connectors are evenly arranged on the lower surface of the intermediate partition wall guide wall along the jacking direction of the jacking pipe.

5. The pipe jacking section intermediate partition wall with grouting holes according to claim 4 is characterized in that: A plurality of second steel bar connectors are pre-buried on the bottom plate at positions corresponding to the first steel bar connectors. The second steel bar connectors cooperate with the first steel bar connectors to install the longitudinal steel bars in the steel mesh in the middle partition wall.

6. The pipe jacking section intermediate partition wall with grouting holes according to claim 1, characterized in that: The grouting pipes are arranged at intervals of 0.5m-1m along the jacking direction of the jacking pipe.

7. A construction method for a partition wall in a jacking pipe section with grouting holes as claimed in any one of claims 1 to 6, characterized in that: The following steps are involved: Step 1, laying a steel mesh between the middle partition wall lead wall and the bottom plate; Step 2, install the middle partition wall formwork on both sides of the laid steel mesh; Step 3, pouring concrete into the template through the concrete pouring hole reserved at the top of the middle partition wall template until the concrete in the middle partition wall template is densely filled; Step 4, closing the concrete pouring hole, waiting for the concrete strength to reach the demolding strength, and using the interval grouting method to inject grout from the grouting pipe in the middle partition wall into the middle partition wall until the slurry strength reaches the preset requirement; Step 5: Remove the concrete formwork, clean the remaining slurry at the grouting holes, and complete the construction of the partition wall in the pipe section.

8. The pipe-jacking segment intermediate partition wall with grouting holes according to claim 7 is characterized in that: Before step 1, the method further includes: Install the first steel bar connector and the second steel bar connector on the lower surface of the middle partition wall lead wall and the bottom plate surface. After the jacking pipe is completed, clean the debris in the pipe body, clean the lower surface of the middle partition wall lead wall and the bottom plate surface, and expose the first steel bar connector and the second steel bar connector at the connecting part.

9. The pipe jacking section intermediate partition wall with grouting holes according to claim 7, characterized in that: In the step 2, tension screws are inserted between the concrete formworks on both sides, and the main ribs of the formwork are installed on the outer side of the concrete formwork, and the secondary ribs of the formwork are installed on the tension screws, so that the main ribs of the formwork and the secondary ribs of the formwork are vertically arranged.

10. The pipe jacking section intermediate partition wall with grouting holes according to claim 7, characterized in that: In step 4, grouting is performed once for at least one grouting hole, and after the slurry strength of the first grouting reaches a preset strength, secondary grouting is performed on the remaining grouting holes until the grouting of all the grouting holes is completed.

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