Construction method for short-distance pipe jacking pedestrian passage without need for reinforcement of entrance and exit holes

Abstract

The present invention discloses a construction method for a short-distance pipe-jacking pedestrian passage that does not require in-and-out hole reinforcement; 1. Water-stop rubber is arranged around each opening; 2. A side wall support device is built on the part of each side wall located within the opening range; 3. Each side wall support device is connected to a corresponding reaction force device and supports the corresponding side wall; 4. The side wall of any existing underground space to be opened with an opening is selected as the steel pipe jacking side, and a hole groove of the corresponding opening is opened on the steel pipe jacking side by using a temporary steel pipe section; 5. The temporary steel pipe section is pressed in and received in another existing underground space; 6. A pipe jacking machine is installed, the side wall support device on the steel pipe jacking side is removed, and a permanent pipe section structure is jacked into the temporary steel pipe section by using a pipe jacking machine; 7. After the jacking of the permanent pipe section structure is completed, the temporary steel pipe section is pulled out on the steel pipe jacking side. The application of the present invention makes it unnecessary to reinforce the soil during the construction of the pedestrian passage, and completely eliminates the adverse effects caused by the reinforcement of the soil.

Description

Technical Field

[0001] The present invention relates to the technical field of pedestrian passage construction, and particularly to a construction method for a short-distance pipe-jacking pedestrian passage without reinforcement for entering and exiting the tunnel. Background Art

[0002] With the development of the economy, there are more and more urban underground space constructions, and the interaction of people is also becoming more and more frequent.

[0003] In the early stage, the underground spaces of many urban plots were independent. The underground spaces between plots or even between buildings were not connected and could only be connected on the ground. This not only seriously affected the ground traffic, but also increased the walking path of people and the outdoor exposure time (affected by the weather), reducing the experience.

[0004] Therefore, under the current background of "carbon peak and carbon neutrality", connecting existing underground spaces is one of the ways to promote urban renewal and improve the quality of people's lives, and the demand is large.

[0005] In the prior art, especially in soft soil areas, pipe-jacking method is mainly used to construct an underground pedestrian passage between two existing underground spaces.

[0006] At the same time, due to the soft soil in soft soil areas, it is necessary to reinforce the soil at the tunnel entrance and exit during pipe-jacking. Generally, methods such as mixing piles and jet grouting piles are used for reinforcement.

[0007] However, the above reinforcement methods are all constructed on the ground, so there are the following deficiencies:

[0008] 1) It occupies the ground space and damages the existing ground environment;

[0009] 2) It is easy for mud to flow out during construction and pollute the environment;

[0010] 3) The distance between two buildings is relatively narrow and the construction site is limited;

[0011] 4) There cannot be underground pipelines in the mixing pile reinforcement area. The jet grouting pile needs to pass through the area with dense shallow surface pipelines, which will affect the pipelines and may require pipeline relocation.

[0012] Therefore, how to eliminate the adverse effects caused by soil reinforcement during the construction of pedestrian passages has become an urgent technical problem for those skilled in the art. Summary of the Invention

[0013] In view of the above-mentioned defects of the prior art, the present invention provides a construction method for a short-distance pipe-jacking pedestrian passage without reinforcement for entering and exiting the tunnel, and the achieved purpose is to eliminate the need for soil reinforcement during the construction of pedestrian passages and completely eliminate the adverse effects caused by soil reinforcement during the construction of pedestrian passages.

[0014] To achieve the above object, the present invention discloses a construction method for a short-distance pipe jacking pedestrian passage without the need for in-and-out hole reinforcement; the pedestrian passage is arranged between two existing underground spaces; on each of the two side walls of each of the existing underground spaces connected to the pedestrian passage, there are openings matching the corresponding ends of the pedestrian passage, and the method includes the following steps:

[0015] Step 1, a ring of water-stop rubber is arranged around the periphery of each of the openings;

[0016] Step 2, multiple groups of steel bars are implanted in the part of each side wall within the range of the opening, and at one end of each group of steel bars located within the corresponding existing underground space, a sub-support frame is arranged through an anchor plate, and then multiple sub-support frames within each existing underground space are connected to the main support frame to form a side wall support device;

[0017] Step 3, each side wall support device is connected to the reaction device within the corresponding existing underground space through the corresponding main support frame, and supports the side wall where the corresponding steel bars are located;

[0018] Step 4, select the side wall of any one of the existing underground spaces where the opening is to be opened as the steel pipe jacking side, and use a temporary steel pipe section to cut out the hole groove of the corresponding opening on the steel pipe jacking side;

[0019] Step 5, press the temporary steel pipe section into the steel pipe jacking side and receive it within the other existing underground space;

[0020] Step 6, install a pipe jacking machine, remove the side wall support device on the steel pipe jacking side, and use the pipe jacking machine to jack a permanent pipe joint structure into the temporary steel pipe section;

[0021] Step 7, after the jacking of the permanent pipe joint structure is completed, pull out the temporary steel pipe section on the steel pipe jacking side.

[0022] Preferably, before the start of construction, dewatering wells are respectively arranged on both sides of the to-be-built pedestrian passage;

[0023] Each dewatering well is used to control the water level at the location of the to-be-built pedestrian passage to a depth more than 1 m below the bottom of the pedestrian passage.

[0024] Preferably, each group of steel bars is fixed to the corresponding anchor plate by welding;

[0025] Between each anchor plate and the corresponding sub-support frame, and between each sub-support frame and the corresponding main support frame, they are connected by bolts.

[0026] Preferably, the width of each water-stop rubber exceeds the width of the hole groove on the outer side of the corresponding opening for arranging the water-stop rubber by more than one time, and the inner diameter is smaller than the opening;

[0027] A circle of water-stop rubber fixing steel bars is implanted in the side wall part of each existing underground space in contact with the corresponding water-stop rubber;

[0028] A steel ring is arranged on one side of each water-stop rubber facing the inner side of the corresponding existing underground space;

[0029] Each steel ring is bolt-connected to the corresponding circle of water-stop rubber fixing steel bars to press and fix the corresponding water-stop rubber on the corresponding side wall.

[0030] More preferably, the inner diameter of each steel ring is larger than the corresponding opening.

[0031] More preferably, the temporary steel pipe section includes a starting section, an intermediate section and an ending section connected in sequence;

[0032] During the process of using the temporary steel pipe section to open the corresponding opening on the steel pipe jacking side, the starting section, the intermediate section and the ending section are connected one by one. That is, after the starting section is pressed in, the starting section is connected to the intermediate section and continues to be pressed in; after the intermediate section is pressed in, the intermediate section is connected to the ending section and continues to be pressed in;

[0033] The starting section, the intermediate section and the ending section all include an outer steel pipe and a middle support rigid frame;

[0034] Each middle support rigid frame is vertically arranged at the center position of the cross-section of the corresponding starting section, the corresponding intermediate section or the corresponding ending section, and the upper and lower ends are movably connected to the inner wall of the outer steel pipe of the corresponding starting section, the corresponding intermediate section or the corresponding ending section through sliding guide rails;

[0035] In step 5, all the middle support rigid frames are pushed out by the permanent pipe section structure jacked in by the pipe jacking machine.

[0036] More preferably, during the process of using the temporary steel pipe section to open the corresponding opening on the steel pipe jacking side, first fix the middle support rigid frame in the starting section, then press the starting section into the opening, and during the pressing process, bring the water-stop rubber arranged on the corresponding side wall into the opening together.

[0037] More preferably, after the starting section penetrates into another existing underground space, the starting section and the ending section are both fixedly connected to the closest steel ring by bolts arranged in a plurality of connection holes of the corresponding outer steel pipe;

[0038] After the jacking of the permanent pipe joint structure is completed, loosen all the bolts between the first section and the last section and the corresponding steel rings.

[0039] More preferably, limit plates are provided on both sides of each sliding guide rail, and limit slots are formed by the corresponding two limit plates to constrain the corresponding middle support rigid frame on the corresponding sliding guide rail.

[0040] More preferably, one end of the first section is connected to the corresponding middle section, and limit bolts are provided between every two of the limit plates at the other end;

[0041] During the process of using the temporary steel pipe section to open the corresponding opening on the steel pipe jacking side, the first section fixes the corresponding middle support rigid frame through the corresponding limit bolts;

[0042] After the first section penetrates into another existing underground space, loosen the limit bolts;

[0043] One end of the last section is connected to the corresponding middle section, and a ring flange structure that turns outwards is provided at the other end.

[0044] Advantages of the present invention:

[0045] The application of the present invention enables the construction of a pedestrian passage without soil reinforcement, completely eliminating the adverse effects generated during soil reinforcement in the construction of a pedestrian passage.

[0046] The following will further illustrate the concept, specific structure and technical effects of the present invention with reference to the drawings, so as to fully understand the purpose, features and effects of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 A schematic top view structure diagram showing an embodiment of the present invention.

[0048] Figure 2 A schematic longitudinal sectional structure diagram showing an embodiment of the present invention.

[0049] Figure 3 A schematic structure diagram of a side wall with an opening in an existing underground space in an embodiment of the present invention.

[0050] Figure 4 A schematic cross-sectional structure diagram of a temporary steel pipe section in an embodiment of the present invention.

[0051] Figure 5 Showing the present invention Figure 4 A partial enlarged structure diagram at A in

[0052] Figure 6 Show the present invention Figure 4 The partial enlarged structure schematic diagram at position B in the present invention

[0053] Figure 7 The structure schematic diagram of the side wall support device in an embodiment of the present invention

[0054] Figure 8 The longitudinal sectional structure schematic diagram of the first section in an embodiment of the present invention

[0055] Figure 9 The longitudinal sectional structure schematic diagram of the middle section in an embodiment of the present invention

[0056] Figure 10 The longitudinal sectional structure schematic diagram of the end section in an embodiment of the present invention Detailed implementation manners Embodiment

[0057] As Figures 1 to 7 shown, a construction method for a short-distance pipe jacking pedestrian passage without need for reinforcement of the entrance and exit of the tunnel; the pedestrian passage is arranged between two existing underground spaces 9; openings 7 matching the corresponding ends of the pedestrian passage are provided on the two side walls 10 of each existing underground space 9 connected to the pedestrian passage, and the method includes the following steps:

[0058] Step 1, a ring of water-stop rubber 5 is arranged around each opening 7;

[0059] Step 2, multiple groups of steel bars 32 are implanted in the part of each side wall 10 within the range of the opening 7, and a sub-support frame 34 is arranged at one end of each group of steel bars 32 located in the corresponding existing underground space 9 through an anchor plate 33, and then the multiple sub-support frames 34 in each existing underground space 9 are connected to the main support frame 31 to form a side wall support device 3;

[0060] Step 3, each side wall support device 3 is connected to the reaction device 2 in the corresponding existing underground space 9 through the corresponding main support frame 31, and the side wall 10 where the corresponding steel bars 32 are located is supported;

[0061] Step 4, select the side wall 10 of any existing underground space 9 where the opening 7 is to be opened as the steel pipe jacking side, use a temporary steel pipe section 1 to cut out the hole groove of the corresponding opening 7 on the steel pipe jacking side, and then cut out the hole groove of the opening 7;

[0062] Step 5, press the temporary steel pipe section 1 on the steel pipe jacking side and receive it in the other existing underground space 9;

[0063] Step 6, install a pipe jacking machine, remove the side wall support device 3 on the steel pipe jacking side, and use the pipe jacking machine to jack in a permanent pipe joint structure in the temporary steel pipe section 1;

[0064] Step 7: After the permanent pipe joint structure is jacked in place, pull out the temporary steel pipe joint 1 on the side where the steel pipe is jacked in.

[0065] In the present invention, a water stop rubber 5 is pre-buried around the opening 7 in the side wall 10 of the existing underground space 9, and the side wall 10 on the side where the steel pipe is jacked in is fixed by the side wall support device 3.

[0066] First, cut out a hole groove within the range where the opening 7 is to be opened, and then press in the prefabricated temporary steel pipe joint 1.

[0067] After the jacking of the temporary steel pipe joint 1 is completed, use the temporary steel pipe joint 1 as a support, and then use a pipe jacking machine to jack in the permanent pipe joint structure within the temporary steel pipe joint 1.

[0068] Finally, pull out the temporary steel pipe joint 1 from the side where the steel pipe is jacked in.

[0069] The present invention can achieve jacking pipe construction without the need to reinforce the in-and-out hole parts. The temporary steel pipe joint 1 can play a role in temporarily supporting the soil layer, reducing the impact on the surrounding environment during the jacking of the permanent pipe joint structure, and can also be pulled out for repeated use.

[0070] In practical applications, grouting ducts can be provided on both sides of the side wall of the temporary steel pipe joint 1. During the pressing-in and pulling-out processes, lubricating materials can be injected to reduce the frictional resistance, facilitate the pressing-in and pulling-out, and when the pipe jacking machine is jacking in, injecting lubricating materials can facilitate the jacking in of the permanent pipe joint structure.

[0071] Before the permanent pipe joint structure is jacked in, the soil within the temporary steel pipe joint 1 at the starting end can be solidified to prevent local collapse of the soil within the temporary steel pipe joint 1 after the side wall support device 3 is removed.

[0072] In some embodiments, before starting the construction, precipitation wells 8 are respectively arranged on both sides of the to-be-built pedestrian passage.

[0073] Each precipitation well 8 is used to control the water level at the location of the to-be-built pedestrian passage to a depth more than 1 m below the bottom of the pedestrian passage.

[0074] In some embodiments, each group of steel bars 32 and the corresponding anchor plate 33 are fixed by welding.

[0075] Between each anchor plate 33 and the corresponding sub-support frame 34, and between each sub-support frame 34 and the corresponding main support frame 31, they are connected by bolts.

[0076] In some embodiments, the width of each water stop rubber 5 exceeds the width of the hole groove on the outside of the corresponding opening 7 for arranging the water stop rubber 5 by more than one time, and the inner diameter is smaller than the opening 7.

[0077] For each part of the side wall 10 of each existing underground space 9 that contacts the corresponding waterstop rubber 5, a circle of waterstop rubber fixing steel bars 4 is implanted.

[0078] On one side of each waterstop rubber 5 facing the inside of the corresponding existing underground space 9, a steel ring 6 is provided.

[0079] Each steel ring 6 is bolted to the corresponding circle of waterstop rubber fixing steel bars 4 to press and fix the corresponding waterstop rubber 5 on the corresponding side wall 10.

[0080] In some embodiments, the inner diameter of each steel ring 6 is larger than the corresponding opening 7.

[0081] Such as Figures 8 to 10 As shown, in some embodiments, the temporary steel pipe section 1 includes a starting section, an intermediate section, and an ending section connected in sequence.

[0082] During the process of using the temporary steel pipe section 1 to open the corresponding opening 7 on the side of the steel pipe jacking, the starting section, the intermediate section, and the ending section are connected one by one. That is, after the starting section is pressed in, the starting section is connected to the intermediate section and continues to be pressed in; after the intermediate section is pressed in, the intermediate section is connected to the ending section and continues to be pressed in.

[0083] The starting section, the intermediate section, and the ending section all include an outer steel pipe 11 and a middle support rigid frame 12.

[0084] Each middle support rigid frame 12 is vertically arranged at the cross-sectional center position of the corresponding starting section, the corresponding intermediate section, or the corresponding ending section, and both the upper and lower ends are movably connected to the inner wall of the outer steel pipe 11 of the corresponding starting section, the corresponding intermediate section, or the corresponding ending section through sliding guide rails 13.

[0085] In step 5, all the middle support rigid frames 12 are pushed out by the permanent pipe section structure jacked in by the pipe jacking machine.

[0086] In some embodiments, during the process of using the temporary steel pipe section 1 to open the corresponding opening 7 on the side of the steel pipe jacking, first fix the middle support rigid frame 12 in the starting section, then press the starting section into the opening 7, and during the pressing process, the waterstop rubber 5 provided on the corresponding side wall 10 is also brought into the opening 7.

[0087] In some embodiments, after the starting section penetrates into another existing underground space 9, both the starting section and the ending section are fixedly connected to the closest steel ring 6 by bolts provided in a plurality of connection holes 16 on the corresponding outer steel pipe 11.

[0088] After the permanent pipe section structure completes the jacking, all the bolts between the starting section and the ending section and the corresponding steel ring 6 are loosened.

[0089] In some embodiments, limiting plates 14 are provided on both sides of each sliding guide rail 13, and limiting grooves are formed by the corresponding two limiting plates 14 to constrain the corresponding middle support rigid frame 12 on the corresponding sliding guide rail 13.

[0090] In some embodiments, one end of the first section is connected to the corresponding middle section, and limiting bolts 15 are provided between every two limiting plates 14 at the other end;

[0091] During the process of using the temporary steel pipe section 1 to open the corresponding opening 7 on the steel pipe jacking side, the first section fixes the corresponding middle support rigid frame 12 through the corresponding limiting bolts 15;

[0092] After the first section penetrates into another existing underground space 9, the limiting bolts 15 are loosened;

[0093] One end of the end section is connected to the corresponding middle section, and the other end is provided with an outwardly folded annular flange structure.

[0094] The preferred specific embodiments of the present invention have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations based on the concept of the present invention without creative work. Therefore, all technical solutions that can be obtained by those skilled in the art in the technical field of the present invention based on the concept of the present invention through logical analysis, reasoning, or limited experiments on the basis of the prior art should be within the protection scope determined by the claims.

Claims

1. Construction method for short-distance pipe jacking pedestrian passage without need for reinforcement of entrance and exit holes; the pedestrian passage is arranged between two existing underground spaces (9); openings (7) matching the corresponding ends of the pedestrian passage are provided on the two side walls (10) of each of the existing underground spaces (9) connected to the pedestrian passage; It is characterized in that, it includes the following steps: Step 1, a ring of water stop rubber (5) is arranged around each of the openings (7); Step 2, multiple groups of steel bars (32) are implanted in the part of each side wall (10) within the range of the opening (7), and at one end of each group of steel bars (32) located within the corresponding existing underground space (9), a sub-support frame (34) is arranged through an anchor plate (33), and then multiple sub-support frames (34) within each existing underground space (9) are connected to the main support frame (31) to form a side wall support device (3); Step 3, each side wall support device (3) is connected to the reaction device (2) within the corresponding existing underground space (9) through the corresponding main support frame (31), and the side wall (10) where the corresponding steel bars (32) are located is supported; Step 4, select the side wall (10) of any one of the existing underground spaces (9) where the opening (7) is to be opened as the steel pipe jacking side, and use a temporary steel pipe section (1) to cut out the hole groove of the corresponding opening (7) on the steel pipe jacking side; Step 5, press the temporary steel pipe section (1) on the steel pipe jacking side and receive it within the other existing underground space (9); Step 6, install a pipe jacking machine, remove the side wall support device (3) on the steel pipe jacking side, and use the pipe jacking machine to jack a permanent pipe joint structure into the temporary steel pipe section (1); Step 7, after the jacking of the permanent pipe joint structure is completed, pull out the temporary steel pipe section (1) on the steel pipe jacking side.

2. The construction method for short-distance pipe jacking pedestrian passage without need for reinforcement of entrance and exit holes according to claim 1, it is characterized in that, before the start of construction, precipitation wells (8) are respectively arranged on both sides of the to-be-built pedestrian passage; each precipitation well (8) is used to control the water level at the location of the to-be-built pedestrian passage to a depth more than 1 m below the bottom of the pedestrian passage.

3. The construction method for short-distance pipe jacking pedestrian passage without need for reinforcement of entrance and exit holes according to claim 1, it is characterized in that, each group of steel bars (32) is fixed to the corresponding anchor plate (33) by welding; between each anchor plate (33) and the corresponding sub-support frame (34), and between each sub-support frame (34) and the corresponding main support frame (31), they are connected by bolts.

4. The construction method for short-distance pipe jacking pedestrian passage without need for reinforcement of entrance and exit holes according to claim 1, it is characterized in that, the width of each water stop rubber (5) exceeds the width of the hole groove for setting the water stop rubber (5) outside the corresponding opening (7) by more than one time, and the inner diameter is smaller than the opening (7); A ring of waterstop rubber fixing steel bars (4) is implanted in each side wall (10) part of each existing underground space (9) that contacts the corresponding waterstop rubber (5); On one side of each waterstop rubber (5) facing the inner side of the corresponding existing underground space (9), a steel ring (6) is provided; Each steel ring (6) is bolted to the corresponding ring of waterstop rubber fixing steel bars (4) to press and fix the corresponding waterstop rubber (5) on the corresponding side wall (10).

5. The construction method of a short-distance pipe jacking pedestrian passage without out-of-hole reinforcement according to claim 4, characterized in that, The inner diameter of each steel ring (6) is larger than the corresponding opening (7).

6. The construction method of a short-distance pipe jacking pedestrian passage without out-of-hole reinforcement according to claim 4, characterized in that, The temporary steel pipe section (1) includes a starting section, an intermediate section and an ending section connected in sequence; During the process of using the temporary steel pipe section (1) to open the corresponding opening (7) on the steel pipe jacking side, the starting section, the intermediate section and the ending section are connected one by one. That is, after the starting section is pressed in, the starting section is connected to the intermediate section and continues to be pressed in; after the intermediate section is pressed in, the intermediate section is connected to the ending section and continues to be pressed in; The starting section, the intermediate section and the ending section all include an outer steel pipe (11) and a middle support rigid frame (12); Each middle support rigid frame (12) is vertically arranged at the cross-section center position of the corresponding starting section, the corresponding intermediate section or the corresponding ending section, and the upper and lower ends are movably connected to the inner wall of the corresponding outer steel pipe (11) of the corresponding starting section, the corresponding intermediate section or the corresponding ending section through sliding guide rails (13); In step 5, all the middle support rigid frames (12) are pushed out by the permanent pipe section structure jacked in by the pipe jacking machine.

7. The construction method of a short-distance pipe jacking pedestrian passage without out-of-hole reinforcement according to claim 6, characterized in that, During the process of using the temporary steel pipe section (1) to open the corresponding opening (7) on the steel pipe jacking side, first fix the middle support rigid frame (12) in the starting section, then press the starting section into the opening (7), and during the pressing process, bring the waterstop rubber (5) arranged on the corresponding side wall (10) into the opening (7) together.

8. The construction method of a short-distance pipe jacking pedestrian passage without out-of-hole reinforcement according to claim 6, characterized in that, After the starting section penetrates into another existing underground space (9), both the starting section and the ending section are fixedly connected to the closest steel ring (6) by bolts arranged in a plurality of connection holes (16) of the corresponding outer steel pipe (11); After the permanent pipe section structure completes the jacking, loosen all the bolts between the starting section and the ending section and the corresponding steel ring (6).

9. The construction method of a short-distance pipe jacking pedestrian passage without out-of-hole reinforcement according to claim 6, characterized in that, On both sides of each of the sliding guide rails (13), there are limit plates (14), and limit grooves are formed by the corresponding two limit plates (14), and the corresponding middle support rigid frame (12) is constrained on the corresponding sliding guide rail (13).

10. The construction method of a short-distance pipe jacking pedestrian passage without in-and-out hole reinforcement according to claim 9, characterized in that one end of each of the first sections is connected to the corresponding middle section, and limit bolts (15) are provided between every two of the limit plates (14) at the other end; during the process of using the temporary steel pipe section (1) to open the corresponding opening (7) on the steel pipe jacking side, each of the first sections fixes the corresponding middle support rigid frame (12) through the corresponding limit bolt (15); after the first section penetrates into another existing underground space (9), the limit bolt (15) is loosened; one end of each of the end sections is connected to the corresponding middle section, and a ring flange structure that turns outwards is provided at the other end.

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