Pipe jacking receiving well structure

Abstract

The utility model relates to a pipe jacking receiving well structure which comprises a receiving well body, an inverted-L-shaped well ring is arranged at the top of the receiving well body, a vertical well wall composed of a plurality of sections of right-angle inverted trapezoidal structures is connected to the lower portion of the inverted-L-shaped well ring, and the bottom of the receiving well body is sealed through plain concrete. The vertical well wall surrounds the outer side of the plain concrete sealing bottom, a single-layer jet grouting pile is arranged on the periphery of the vertical well wall, the top of the single-layer jet grouting pile is connected with the inverted-L-shaped well ring, and the bottom of the single-layer jet grouting pile is lower than the bottom of the plain concrete sealing bottom and the bottom of the vertical well wall. A built-in well is arranged in the receiving well body, the bottom of the built-in well abuts against the plain concrete sealing bottom, the outer side wall of the built-in well abuts against the vertical well wall, a concrete flow groove is formed in the built-in well, and the concrete flow groove is formed in the bottom of the built-in well and used for being sequentially connected with pipe jacking pipelines on the two sides of the built-in well. A water stop belt is arranged at the end, connected with the concrete flow groove, of the pipe jacking pipeline.

Description

Technical Field

[0001] The utility model belongs to the technical field of building construction, in particular to a jacking pipe receiving well structure. Background Art

[0002] Pipe jacking technology is a non-excavation, advance-type pipe laying construction technology used in municipal engineering. It starts with the pipe jacking working pit. A main jacking jack system is installed in the working pit to provide horizontal thrust, which is guided by the machine head. The reinforced concrete pipe is then pushed forward section by section following the machine head until the machine head enters the receiving pit and is recovered to complete the laying of the pipe. The pipe jacking working pit and receiving pit are important components of pipe jacking technology, and their construction process directly affects the progress and cost of the entire project. However, during the construction and renovation process in urban areas, the construction of the pipe jacking receiving pit is cumbersome due to the complex distribution of various municipal pipelines around the excavation pit. In addition, due to the influence of hydrogeology, the receiving pit has the risk of structural instability and leakage. Utility Model Content

[0003] The utility model aims to provide a pipe jacking receiving well structure with strong anti-seepage ability, small disturbance and safe and reliable structure.

[0004] The technical solution of the present utility model is a jacking pipe receiving well structure, comprising a receiving well main body, the top of the receiving well main body is provided with an inverted L-shaped well ring, the bottom of the inverted L-shaped well ring is connected to a vertical well wall composed of multiple right-angled inverted trapezoidal structures, the bottom of the receiving well main body is sealed with plain concrete, the vertical well wall surrounds the outside of the plain concrete bottom seal, a single-layer rotary jet pile is provided on the periphery of the vertical well wall, the top of the single-layer rotary jet pile is connected to the inverted L-shaped well ring, the bottom of the single-layer rotary jet pile is lower than the plain concrete bottom seal and the bottom of the vertical well wall; a built-in well is provided inside the receiving well main body, the bottom of the built-in well abuts the plain concrete bottom seal, the outer wall of the built-in well abuts the vertical well wall, a concrete flow trough is provided in the built-in well, the concrete flow trough is arranged at the bottom of the built-in well, for connecting the jacking pipes on both sides of the built-in well, and a water stop is provided at the end where the jacking pipe is connected to the concrete flow trough.

[0005] Preferably, the upper part of the concrete flow trough is provided with a U-shaped groove and the bottom is sealed with plain concrete; according to the relative positions of the top pipes on both sides along the horizontal direction of the receiving well body, the concrete flow trough is constructed as a straight structure or an arc structure; according to the relative positions of the top pipes on both sides along the vertical direction of the receiving well body, the bottom surface of the U-shaped groove is constructed as a horizontal surface or an inclined surface.

[0006] Preferably, the vertical shaft wall is provided with a reserved pipe hole, the inner diameter of the reserved pipe hole is about 150 mm larger than the outer diameter of the top pipe, so that a gap is formed between the reserved pipe hole and the top pipe.

[0007] Preferably, the gap is filled with dry concrete to form a concrete filling layer; both ends of the concrete filling layer are sealed with cement mortar mixed with construction glue.

[0008] Preferably, a reinforced concrete well ring is provided in the receiving well body, the bottom of the reinforced concrete well ring is connected to the top of the built-in well, and steps are provided along the vertical direction of the receiving well body, and the steps extend from the top of the reinforced concrete well ring to the bottom of the built-in well.

[0009] Preferably, a backfill structure is formed between the built-in well, the reinforced concrete well ring and the receiving well body; the top of the receiving well is paved with an asphalt pavement, and the pavement is located on the upper layer of the backfill structure; a manhole cover is provided on the top of the reinforced concrete well ring, and the manhole cover is flush with the pavement.

[0010] Preferably, a fence is provided on the top of the receiving well body, and the fence is composed of steel bar cross bars, steel bar vertical bars and a nylon net attached to the railings connected to the steel bar cross bars and steel bar vertical bars.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] (1) By adopting a built-in well and a concrete flow channel structure that are compatible with the underground pipeline in the main body of the receiving well, the top pipe receiving well structure can be applied to the construction in complex areas of underground pipelines with little construction disturbance.

[0013] (2) The anti-seepage performance of the jacking pipe receiving well structure is improved by setting a single layer of high-pressure rotary jet piles on the periphery of the receiving well body and using dry concrete filling and cement mortar mixed with construction glue to seal between the pre-buried pipe and the jacking pipe.

[0014] ⑶ By setting reinforced concrete well rings and steps in the main body of the receiving well, the construction convenience and efficiency can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a top view of the first embodiment of the jacking pipe receiving well structure of the utility model;

[0016] Figure 2 yes Figure 1 Schematic diagram of the cross section of AA;

[0017] Figure 3 yes Figure 1 Schematic diagram of the structure between the middle jacking pipe and the reserved pipe hole;

[0018] Figure 4 yes Figure 1 Schematic diagram of the structure of the concrete flow channel;

[0019] Figure 5This is a top view of a second embodiment of the jacking pipe receiving well structure of the utility model;

[0020] Figure 6 yes Figure 5 Schematic diagram of the cross section of AA;

[0021] Figure 7 This is a top view of the third embodiment of the jacking pipe receiving well structure of the utility model;

[0022] Figure 8 yes Figure 7 Schematic diagram of the cross section of AA;

[0023] Figure 9 yes Figure 7 Schematic cross-section of the middle BB;

[0024] Figure 10 This is a top view of a fourth embodiment of the jacking pipe receiving well structure of the utility model;

[0025] Figure 11 yes Figure 10 Schematic diagram of the cross section of AA.

[0026] Description of main component symbols:

[0027] Receiving well body 1; inverted L-shaped well ring 11; vertical well wall 12; plain concrete bottom seal 13; concrete filling layer 14; cement mortar 141; single-layer jet grouting pile 2; built-in well 3; concrete flow channel 31; U-shaped groove 311; jacking pipe 4; reinforced concrete well ring 5; step 51; well cover 52; backfill structure 6; road surface 7; enclosure 8; steel bar horizontal bar 81; steel bar vertical bar 82; railing external nylon mesh 83. DETAILED DESCRIPTION

[0028] The present invention will be further described below with reference to the accompanying drawings:

[0029] See also Figures 1 to 11 As shown, the utility model provides a top pipe receiving well structure, including a receiving well body 1, an inverted L-shaped well ring 11 is provided on the top of the receiving well body 1, and a vertical well wall 12 composed of multiple sections of right-angled inverted trapezoidal structures is connected below the inverted L-shaped well ring 11. The bottom of the receiving well body 1 adopts a plain concrete bottom seal 13, and the vertical well wall 12 surrounds the outside of the plain concrete bottom seal 13.

[0030] like Figures 1 to 2As shown, a single layer of jet grouting piles 2 is arranged around the periphery of the vertical shaft wall 12, with adjacent high-pressure jet grouting piles interlocking by a quarter. The tops of the single-layer jet grouting piles 2 are connected to the inverted L-shaped shaft ring 11, and the bottoms of the single-layer jet grouting piles 2 are lower than the plain concrete bottom seal 13 and the bottom of the vertical shaft wall 12. By evenly arranging the single layer of high-pressure jet grouting piles 2 around the circumference of the receiving shaft body 1, water is prevented, ensuring the anti-seepage performance of the receiving shaft body 1. The high-pressure jet grouting piles also serve as reinforcement, ensuring construction safety.

[0031] See also Figures 1 to 11 As shown, a built-in well 3 is provided inside the receiving well body 1, the bottom of the built-in well 3 abuts against the plain concrete bottom seal 13, the outer wall of the built-in well 3 abuts against the vertical well wall 12, and a concrete flow trough 31 is provided in the built-in well 3. The concrete flow trough 31 is arranged at the bottom of the built-in well 3 to connect the jacking pipes 4 on both sides of the built-in well 3, and a water stop is provided at the end where the jacking pipes 4 are connected to the concrete flow trough 31 to avoid the risk of leakage at the connection position.

[0032] See also Figure 4 As shown, the upper part of the concrete flow channel 31 is provided with a U-shaped groove 311 and the bottom is sealed with plain concrete; Figure 1 、 Figure 5 、 Figure 7 、 Figure 10 As shown, according to the relative positions of the jacking pipes 4 on both sides along the horizontal direction of the receiving well body 1, the concrete flow channel 31 is constructed as a straight structure or an arc structure; Figure 2 、 Figure 6 、 Figure 8 、 Figure 11 As shown, the bottom surface of the U-shaped groove 311 is configured as a horizontal surface or an inclined surface, depending on the relative vertical position of the jacking pipes 4 on both sides along the receiving shaft body 1. Adaptive concrete flow channels 31 are provided according to the positions of the jacking pipes 4 on both sides, ensuring a perfect transition when water flows through pipe corners or joints.

[0033] See also Figure 3 As shown, a reserved pipe hole is provided in the vertical shaft wall 12. The reserved pipe hole is approximately 150 mm larger than the outer diameter of the jacking pipe, creating a gap between the reserved pipe hole and the jacking pipe. This gap is filled with dry concrete to form a concrete filling layer 14. The ends of the concrete filling layer 14 are sealed with cement mortar 141 containing construction adhesive. By using dry concrete filling and cement mortar to seal the gap, the gap is effectively sealed, preventing groundwater, mud, and sand from flowing into the receiving shaft through the gap due to poor sealing, thereby affecting construction operations and reducing the risk of construction accidents.

[0034] See also Figure 2 As shown, a reinforced concrete well ring 5 is provided in the receiving well body 1, and the bottom of the reinforced concrete well ring 5 is connected to the top of the built-in well 3; Figure 9As shown, a step 51 is provided along the vertical direction of the receiving well body 1, and the step 51 extends from the top of the reinforced concrete well ring 5 to the bottom of the built-in well 3 to facilitate construction workers to enter the built-in well 3 for construction work.

[0035] See also Figure 2 As shown, a backfill structure 6 is formed between the built-in well 3, the reinforced concrete well ring 5, and the receiving well body 1. Backfill is made of backfill material. An asphalt pavement 7 is laid on top of the receiving well body 1, above the backfill structure 6. The portion of the inverted L-shaped well ring 11 above the asphalt pavement 7 is removed after construction is complete. A manhole cover 52 is installed on top of the reinforced concrete well ring 5, flush with the asphalt pavement 7.

[0036] See also Figure 2 As shown, a fence 8 is provided on the top of the receiving shaft body 1. The fence 8 is composed of a steel bar cross bar 81, a steel bar vertical bar 82 and a railing external nylon net 83 connected to the steel bar cross bar 81 and the steel bar vertical bar 82. The fence 8 is provided to improve the safety of the construction.

[0037] Example 1

[0038] The pipe receiving well structure provided in this embodiment is constructed by reverse construction method. Figures 1 to 2 As shown, the horizontal cross section of the receiving well body 1 is the inner diameter The receiving well body 1 is circular, and an inverted L-shaped well ring 11 is provided on the top; the inverted L-shaped well ring 11 is connected to a vertical well wall 12 composed of multiple right-angled inverted trapezoidal structures below. The vertical well wall 12 is a C35 reinforced concrete well wall. The bottom soil layer of the receiving well body 1 is leveled and compacted, and then a C25 plain concrete bottom seal 13 is poured.

[0039] like Figure 2 As shown, the vertical shaft wall 12 is provided with Single-layer high-pressure rotary jet pile 2, according to the engineering geological conditions of the site, the slurry pressure of the high-pressure rotary jet pile is about 20Mpa, the flow rate is 60-70L / min, the air pressure is 0.7Mpa, the lifting speed is not more than 10cm / min, the rotation speed does not exceed 20 revolutions / minute, and the cement consumption per meter is not less than 400kg; it is worth noting that the on-site trial spraying test is not less than 10 piles, and the above parameters are adjusted according to the test results. Before the rotary jet pile construction, 3 test piles are tested to check whether the parameters can meet the design requirements.

[0040] like Figures 1 to 2 As shown, a C35 reinforced concrete built-in well 3 is provided in the receiving well body 1, and the horizontal cross-section of the built-in well 3 is The outer wall of the built-in well 3 is against the vertical well wall 12; a C25 concrete flow channel 31 is provided in the built-in well 3, such as Figure 1As shown, since the jacking pipes 4 on both sides of the built-in well 3 have an angle along the horizontal direction of the receiving well body 1, the concrete flow channel 31 connecting the jacking pipes 4 on both sides is constructed as an arc structure; Figure 2 As shown, due to the height difference between the top pipes 4 on both sides of the built-in well 3 along the vertical direction of the receiving well body 1, the bottom surface of the U-shaped groove 311 of the concrete flow channel 31 is constructed as follows Figure 2 The inclined surface shown allows for a perfect transition of water as it flows through pipe corners or interfaces.

[0041] like Figure 2 As shown, there is a size of The C35 prefabricated reinforced concrete well ring 5 is connected to the top of the built-in well 3. A step 51 is provided along the vertical direction of the receiving well body 1. The step 51 extends from the top of the reinforced concrete well ring 5 to the bottom of the built-in well 3; a backfill structure 6 is formed between the built-in well 3, the reinforced concrete well ring 5 and the receiving well body 1. The backfill is made of stone powder slag. The relative density of the stone powder slag backfill is 0.65 and the compaction degree is not less than 0.94 to ensure the quality and stability of the backfill structure 6; after the backfill is completed, the asphalt pavement 7 is repaired on the upper layer of the backfill structure 6, and the part of the inverted L-shaped well ring 11 located above the asphalt pavement 7 is broken after the construction is completed; the top of the reinforced concrete well ring 5 is provided with a size of The heavy ductile iron manhole cover 52 is flush with the asphalt road surface. The top of the receiving well body 1 is also provided with a fence 8, which is made of Steel bar 81, The railing is composed of a steel bar vertical rod 82 and a nylon net 83 connected to the steel bar horizontal rod 81 and the steel bar vertical rod 82. The fence 8 is set to improve the safety of the construction.

[0042] Example 2

[0043] See also Figures 5 and 6 As shown, the difference between this embodiment and the first embodiment is that the structure of the concrete flow channel 31 located at the bottom of the built-in well 3 is changed in this embodiment.

[0044] In this embodiment, if Figure 5 As shown, according to the horizontal position of the jacking pipes 4 on both sides of the built-in well 3 along the receiving well body 1, the concrete flow channel 31 is a linear structure and is horizontally connected between the jacking pipes 4 on both sides; Figure 6 As shown, due to the height difference between the top pipes 4 on both sides of the built-in well 3 along the vertical direction of the receiving well body 1, the bottom surface of the U-shaped groove 311 of the concrete flow channel 31 is constructed as follows Figure 6 The inclined surface shown.

[0045] Example 3

[0046] See also Figures 7 to 9As shown, the difference between this embodiment and the first embodiment is that the structure of the concrete flow channel 31 located at the bottom of the built-in well 3 is changed in this embodiment.

[0047] like Figure 7 As shown, according to the relative positions of the top pipes 4 on both sides of the built-in well 3 along the horizontal direction of the receiving well body 1, the concrete flow channel 31 is constructed as a straight structure and is horizontally connected between the top pipes 4 on both sides; since there is no height difference between the top pipes 4 on both sides of the built-in well 3 along the vertical direction of the receiving well body 1, the bottom surface of the U-shaped groove 311 of the concrete flow channel 31 is constructed as follows Figure 8 The horizontal plane shown.

[0048] Example 4

[0049] See also Figures 10 and 11 As shown, the difference between this embodiment and the first embodiment is that the embodiment changes the structure of the concrete flow channel 31 located at the bottom of the built-in well 3.

[0050] like Figure 10 As shown, since the top pipes 4 on both sides of the built-in well 3 have an angle along the horizontal direction of the receiving well body 1, the concrete flow channel 31 connecting the top pipes 4 on both sides is constructed as an arc structure; since there is no height difference between the top pipes 4 on both sides of the built-in well 3 along the vertical direction of the receiving well body 1, the bottom surface of the U-shaped groove 311 of the concrete flow channel 31 is constructed as follows Figure 11 The horizontal plane shown.

[0051] The above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention should fall within the scope of the claims of the present invention.

Claims

1. A jacking pipe receiving well structure, comprising a receiving well body, wherein the top of the receiving well body is provided with an inverted L-shaped well ring, and a vertical well wall composed of multiple right-angled inverted trapezoidal structures is connected below the inverted L-shaped well ring. The bottom of the receiving well body is sealed with plain concrete, and the vertical well wall surrounds the outside of the plain concrete bottom seal. A built-in well is provided inside the receiving well body, and the bottom of the built-in well abuts the plain concrete bottom seal, and the outer wall of the built-in well abuts the vertical well wall. The structure is characterized in that: The outer periphery of the vertical well wall is provided with a single layer of jet grouting piles, which are single layer high pressure jet grouting piles of φ600mm@400mm, and adjacent high pressure jet grouting piles are bitten by a quarter; the top of the single layer of jet grouting pile is connected to the inverted L-shaped well ring, and the bottom of the single layer of jet grouting pile is lower than the plain concrete bottom seal and the bottom of the vertical well wall; a concrete flow trough is provided in the built-in well, and the concrete flow trough is arranged at the bottom of the built-in well to connect the jacking pipes on both sides of the built-in well, and the upper part of the concrete flow trough is provided with a U-shaped groove and the bottom seal is made of plain concrete; according to the relative position of the jacking pipes on both sides along the horizontal direction of the receiving well body, the concrete flow trough is provided with a U-shaped groove and the bottom seal is made of plain concrete. The concrete flow trough is constructed as a straight structure or an arc structure; according to the relative positions of the jacking pipes on both sides along the vertical direction of the receiving well body, the bottom surface of the U-shaped groove is constructed as a horizontal surface or an inclined surface, and the end where the jacking pipe is connected to the concrete flow trough is provided with a water stop; the vertical well wall is provided with a reserved pipe hole, the inner diameter of the reserved pipe hole is larger than the outer diameter of the jacking pipe by 150mm, so that a gap is formed between the reserved pipe hole and the jacking pipe, and the gap is filled with dry concrete to form a concrete filling layer; both ends of the concrete filling layer are sealed with cement mortar mixed with construction glue.

2. The pipe jacking receiving well structure according to claim 1, characterized in that: A reinforced concrete well ring is provided in the receiving well body, the bottom of the reinforced concrete well ring is connected to the top of the built-in well, and steps are provided along the vertical direction of the receiving well body, extending from the top of the reinforced concrete well ring to the bottom of the built-in well.

3. The pipe jacking receiving well structure according to claim 2, characterized in that: A backfill structure is formed between the built-in well, the reinforced concrete well ring and the receiving well body; the top of the receiving well is paved with an asphalt pavement, and the pavement is located on the upper layer of the backfill structure; a manhole cover is provided on the top of the reinforced concrete well ring, and the manhole cover is flush with the pavement.

4. The pipe jacking receiving well structure according to claim 1, characterized in that: A fence is provided on the top of the receiving well body, and the fence is composed of steel bar horizontal bars, steel bar vertical bars and a nylon net attached to the railings connected to the steel bar horizontal bars and the steel bar vertical bars.

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