A recyclable back wall for pipe jacking construction and a construction method

Abstract

The present invention provides a recyclable back wall for pipe jacking construction and a construction method, comprising: a first box body, a first cavity is arranged inside the first box body, and a first feeding hole is opened at the upper end of the first box body; a second box body, a second cavity is arranged inside the second box body, a jacking hole matching the first box body is opened on the side surface of the second box body, and a second feeding hole is opened at the upper end of the second box body; a tension rod, the tension rod penetrates through the first box body and the second box body. The beneficial effects of the present invention are as follows: compared with the traditional concrete back wall, the combination of the first box body and the second box body is used for pipe jacking construction operations with different diameters. When in use, fine sand is filled in the first box body and the second box body, reducing the weight of the back wall and accelerating the progress of pipe jacking construction. After the construction is completed, it needs to be demolished and reused, reducing the construction cost.

Description

Technical Field

[0001] The invention belongs to the technical field of pipe jacking construction, and in particular relates to a recyclable back wall for pipe jacking construction and a construction method. Background Art

[0002] Pipe jacking construction technology is one of the non-excavation construction methods for underground pipelines. It does not require excavation of the surface layer and can cross roads, railways, rivers, ground buildings, underground structures and various underground pipelines. It can save a lot of investment, time and land. Since the 21st century, pipe jacking construction has been increasingly used in my country's urban underground projects, and the development of my country's pipe jacking construction technology has become more and more mature.

[0003] The back wall is a structure that provides reaction force for the jack when jacking the pipe. It provides recoil force when the jacking pipe moves forward during the jacking process. The back wall is required to have sufficient strength and rigidity.

[0004] At present, the back wall of the jacking pipe is generally made of cast-in-place reinforced concrete, which takes a long time to cast and maintain, is not conducive to speeding up the construction progress, and needs to be demolished after the construction is completed, which also wastes resources. Summary of the invention

[0005] The invention belongs to the technical field of pipe jacking construction, and in particular relates to a recyclable back wall for pipe jacking construction and a construction method.

[0006] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0007] In one aspect, the present invention provides a recyclable back wall for pipe jacking construction, comprising:

[0008] A first box body, wherein a first cavity is provided in the first box body, and a first feeding hole is opened at the upper end of the first box body;

[0009] A second box body, wherein a second cavity is provided in the second box body, a plug hole matching the first box body is provided on the side of the second box body, and a second feeding hole is provided on the upper end of the second box body;

[0010] A tension rod is provided, wherein the tension rod passes through the first box body and the second box body.

[0011] Furthermore, the first box body is provided with a first tightening hole, the second box body is provided with a second tightening hole, and the tightening tube passes through the first tightening hole and the second tightening hole in sequence;

[0012] The two ends of the tension rod are provided with external threads, and nuts are correspondingly arranged at the two ends of the tension rod. The nuts are threadedly connected to the tension rod, and the two nuts respectively press against the outer side walls of the first box body and the second box body.

[0013] Further, a first discharge hole is formed at the lower end of the first box body. A base is correspondingly provided for the first box body. A placement groove corresponding to the first box body is formed on the base. The depth of the placement groove is greater than the distance from the first discharge port to the lower end face of the first box body.

[0014] A first plug plate is correspondingly provided for the first feeding hole. The first plug plate is detachably connected to the first box body through bolts. There are various models of the first plug plate, and the lengths of the first plug plates of different models are different.

[0015] The first plug plate is used to close the first feeding hole.

[0016] Further, a second discharge hole is formed on the end face of the lower end of the second box body away from the jack. Installation plates II are correspondingly provided at both ends of the second discharge hole. Slots are formed on the end faces of the installation plates II adjacent to the second discharge hole. A second plug plate is arranged in the second slot. The second plug plate is detachably connected to the installation plate II. The second plug plate is used to close the second discharge hole.

[0017] Hand holes are formed at both ends of the second plug plate.

[0018] A cover plate is correspondingly provided for the second feeding hole of the second box body. The cover plate is used to close the second feeding hole. The cover plate is detachably connected to the second box body through bolts.

[0019] Further, lifting rings are provided at the upper ends of both the first box body and the second box body.

[0020] Further, a vertical plate is fixedly arranged in the second box body. The width of the vertical plate matches the thickness of the second cavity. A support plate is arranged on the vertical plate. The width of the support plate matches the thickness of the second cavity.

[0021] The support plate is hinged to the vertical plate.

[0022] A hinge block is fixedly arranged on the vertical plate. A hinge hole is formed in the hinge block. A hinge shaft matching the hinge hole is fixedly arranged on the support plate. The hinge shaft is located inside the hinge hole.

[0023] A through hole matching the tension rod is formed in the hinge plate. The tension rod is located inside the barrel hole.

[0024] On the other hand, the present invention provides a construction method for a back wall for pipe jacking construction that can be recycled and uses the one described in the above-mentioned one aspect, including the following steps:

[0025] S1. Select a corresponding assembly method according to the size of the foundation pit and the diameter of the pipe jacking. Assemble the first box body and the second box body into a back wall.

[0026] S2. Place the assembled back wall at the designated position in the foundation pit. The rear side wall of the back wall is closely attached to the inner wall of the foundation pit or the support structure.

[0027] S3. Rotate the support plate to make the position of the support plate correspond to the position of the jack for pipe jacking construction;

[0028] S4. Fill the first box body and the second box body with fine sand;

[0029] S5. After use, hoist the back wall from the foundation pit to the designated position, open the second plug plate to release the fine sand in the second box body, disassemble the back wall to release the fine sand in the first box body;

[0030] S6. Transfer the first box body and the second box body to the storage position.

[0031] Further, the assembly method includes:

[0032] Assemble using only the first box body. The lower end of the first box body is installed in the placement groove, and there is a gap between the outer side wall of the first box body and the inner side wall of the placement groove;

[0033] Assemble one first box body and one second box body. One end of the first box body is installed inside the jacking hole of the second box body;

[0034] Assemble one first box body and two second box bodies. Both ends of the first box body are respectively installed inside the jacking holes of the two second box bodies;

[0035] The corresponding relationship between the pipe jacking diameter and the assembly method is as follows:

[0036] When the pipe jacking diameter is not greater than 80 cm, select the assembly method of using only the first box body;

[0037] When the pipe jacking diameter is greater than 80 cm and less than 200 cm, select the assembly method of using two second box bodies (1);

[0038] When the pipe jacking diameter is not less than 200 cm or the jacking distance exceeds the threshold value, select the assembly method of using one first box body and two second box bodies.

[0039] Further, the step S4 includes the following steps:

[0040] S401. Alternately fill the first box body and the second box body with fine sand, and the height difference of the fine sand in the first box body and the second box body does not exceed 30 cm;

[0041] S402. After filling the fine sand, use a heavy object to knock on the back wall or an inserted vibrator to vibrate the fine sand to make the fine sand in the first box body and the second box body dense.

[0042] Further, in the step S5, after use, hoist the back wall from the foundation pit above the hopper of the transport vehicle, open the second plug plate to release the fine sand in the second box body, disassemble the back wall to release the fine sand in the first box body, and the fine sand flows into the hopper of the transport vehicle.

[0043] Compared with the prior art, the reusable back wall for pipe jacking construction and the construction method thereof according to the present invention have the following beneficial effects:

[0044] (1) The reusable back wall for pipe jacking construction according to the present invention, compared with the traditional concrete back wall, uses a combination of a first box body and a second box body for pipe jacking construction operations with different diameters. When in use, fine sand is filled in the first box body and the second box body, reducing the weight of the back wall, accelerating the progress of pipe jacking construction, and after the construction is completed, it needs to be demolished and reused, reducing the construction cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0046] Figure 1 is a schematic three-dimensional structure diagram of the assembly method of a first box body and two second box bodies according to an embodiment of the present invention;

[0047] Figure 2 is according to an embodiment of the present invention Figure 1 schematic diagram of the structure at A in;

[0048] Figure 3 is a schematic cross-sectional structure diagram of the assembly method of a first box body and two second box bodies according to an embodiment of the present invention;

[0049] Figure 4 is a schematic three-dimensional structure diagram of the first box body according to an embodiment of the present invention;

[0050] Figure 5 is a schematic three-dimensional structure diagram of the second box body according to an embodiment of the present invention;

[0051] Figure 6 is a schematic three-dimensional structure diagram of the vertical plate according to an embodiment of the present invention;

[0052] Figure 7 is a schematic three-dimensional structure diagram of the support plate according to an embodiment of the present invention.

[0053] Description of the reference numerals:

[0054] 1. Second box body; 2. First box body; 3. Suspension ring; 4. Cover plate; 5. Second insertion plate; 6. Tension rod; 7. Nut; 8. Vertical plate; 9. Support plate; 10. First insertion plate; 501. Hand hole; 101. Second feeding hole; 102. Second tension hole; 103. Second discharge hole; 104. Second mounting plate; 201. First feeding hole; 202. First tension hole; 203. First discharge hole; 801. Through hole; 802. Hinge block; 901. Hinge shaft. Detailed implementation manners

[0055] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments may be combined with each other.

[0056] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0057] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

[0058] The present invention will be described in detail below with reference to the drawings and in combination with embodiments.

[0059] As Figures 1 to 7 shown, a reusable back wall for pipe jacking construction includes:

[0060] A first box body 2, a first cavity is provided inside the first box body 2, and a first feeding hole 201 is opened at the upper end of the first box body 2;

[0061] A second box body 1, a second cavity is provided inside the second box body 1, an insertion hole matching the first box body 2 is opened on the side of the second box body 1, and a second feeding hole 101 is opened at the upper end of the second box body 1;

[0062] The tension rod 6 passes through the first box body 2 and the second box body 1. The tension rod 6 is arranged along the length direction of the first box body 2 and the second box body 1. The size of the first box body 2 is 2m×1m×4m (length×width×height), and the size of the first box body 2 is 2m×0.95m×3.95m (length×width×height). The size of the jack is matched with the size of the first box body 2.

[0063] A first tension hole 202 is opened on the first box body 2, and a second tension hole 102 is opened on the second box body 1. The tension pipe sequentially passes through the first tension hole 202 and the second tension hole 102;

[0064] External threads are opened at both ends of the tension rod 6, and nuts 7 are correspondingly arranged at both ends of the tension rod 6. The nuts 7 are threadedly connected to the tension rod 6, and the two nuts 7 respectively abut against the outer side walls of the first box body 2 and the second box body 1.

[0065] A first discharge hole 203 is opened at the lower end of the first box body 2. A base is correspondingly arranged for the first box body 2. A placement groove corresponding to the first box body 2 is opened on the base, and the depth of the placement groove is greater than the distance from the first discharge port to the lower end surface of the first box body 2;

[0066] A first plug board 10 is correspondingly arranged for the first feeding hole 201. The first plug board 10 is detachably connected to the first box body 2 through bolts. There are various models of the first plug board 10, and the lengths of different models of the first plug board 10 are different;

[0067] The first plug board 10 is used to close the first feeding hole 201.

[0068] A second discharge hole 103 is opened on the end surface of the lower end of the second box body 1 away from the jack. Mounting plates 104 are correspondingly arranged at both ends of the second discharge hole 103. A slot is opened on the end surface of the mounting plate 104 close to the second discharge hole 103. A second plug board 5 is arranged in the slot two. The second plug board 5 is detachably connected to the mounting plate 104. The second plug board 5 is used to close the second discharge hole 103;

[0069] Holes for hand-picking 501 are opened at both ends of the second plug board 5;

[0070] A cover plate 4 is correspondingly arranged for the second feeding hole 101 of the second box body 1. The cover plate 4 is used to close the second feeding hole 101. The cover plate 4 is detachably connected to the second box body 1 through bolts.

[0071] Lifting rings 3 are arranged at the upper ends of both the first box body 2 and the second box body 1. The lifting rings 3 are detachably connected to the first box body 2 and the second box body 1.

[0072] Inside the second box body 1, a vertical plate 8 is fixedly installed. The width of the vertical plate 8 matches the thickness of the second cavity. A support plate 9 is provided on the vertical plate 8, and the width of the support plate 9 matches the thickness of the second cavity. The front end of the vertical plate 8 is fixedly connected to the front end plate of the second box body 1, and the rear end of the vertical plate 8 is fixedly connected to the rear end plate of the second box body 1. The support plate 9 is located between the front end plate and the rear end plate of the second box body 1. The vertical plate 8 and the support plate 9 strengthen the structural strength of the second box body 1, and the position of the rotating support plate 9 corresponds to that of the jack, which can prevent the second box body 1 from deforming during the jacking process.

[0073] The support plate 9 is hinged to the vertical plate 8;

[0074] On the vertical plate 8, a hinge block 802 is fixedly installed. An articulation hole is opened on the hinge block 802. On the support plate 9, a hinge shaft 901 matching the articulation hole is fixedly installed, and the hinge shaft 901 is located inside the articulation hole;

[0075] A through hole 801 matching the tension rod 6 is opened on the hinge plate, and the tension rod 6 is located inside the barrel hole. A construction method of a back wall for pipe jacking construction that can be recycled includes the following steps:

[0076] S1. Select the corresponding assembly method according to the foundation pit size and the pipe jacking diameter, and assemble the first box body 2 and the second box body 1 into a back wall;

[0077] S2. Place the assembled back wall at the designated position in the foundation pit, and the rear side wall (i.e., the rear end plate) of the back wall is closely attached to the inner wall of the foundation pit or the supporting structure;

[0078] S3. Rotate the support plate 9 so that the position of the support plate 9 corresponds to the position of the jack for pipe jacking construction;

[0079] S4. Fill the first box body 2 and the second box body 1 with fine sand;

[0080] S5. After use, hoist the back wall from the foundation pit to the designated position, open the second plug plate 5, release the fine sand in the second box body 1, and disassemble the back wall to release the fine sand in the first box body 2;

[0081] S6. Transfer the first box body 2 and the second box body 1 to the storage position.

[0082] The assembly methods include:

[0083] Assemble the first box body 2 alone. The lower end of the first box body 2 is installed in the placement groove, and there is a gap between the outer side wall of the first box body 2 and the inner side wall of the placement groove;

[0084] Select the assembly method of using two second box bodies 1. The two second box bodies 1 are connected by a tension rod 6;

[0085] A first box body 2 and two second box bodies 1 are assembled. The two ends of the first box body 2 are respectively installed inside the jacks of the two second box bodies 1.

[0086] The corresponding relationship between the pipe jacking diameter and the assembly method is as follows:

[0087] When the pipe jacking diameter is not greater than 80 cm, the assembly method of using the first box body 2 alone is selected.

[0088] When the pipe jacking diameter is greater than 80 cm and less than 200 cm, the assembly method of using two second box bodies 1 is selected; the jacks of the two second box bodies 1 are arranged correspondingly, and the two second box bodies 1 are connected by a tension rod 6, which broadens the applicable range of the back wall.

[0089] When the pipe jacking diameter is not less than 200 cm or the jacking distance exceeds the threshold value (the threshold value is 100 m), the assembly method of using one first box body 2 and two second box bodies 1 is selected. The insertion depth of the first box body 2 into the second box body 1 is adjusted according to the actual working conditions, which broadens the applicable range of the back wall.

[0090] Step S4 includes the following steps:

[0091] S401. Fine sand is alternately filled in the first box body 2 and the second box body 1, and the height difference of the fine sand in the first box body 2 and the second box body 1 does not exceed 30 cm.

[0092] S402. After the fine sand filling is completed, a heavy object is used to knock on the back wall or an inserted vibrator is used to vibrate the fine sand to make the fine sand in the first box body 2 and the second box body 1 dense.

[0093] In step S5, after use, the back wall is hoisted from the foundation pit above the hopper of the transport vehicle, the second plug 5 is opened, the fine sand in the second box body 1 is released, the back wall is disassembled to release the fine sand in the first box body 2, and the fine sand flows into the hopper of the transport vehicle.

[0094] Compared with the traditional concrete back wall, the combination of the first box body 2 and the second box body 1 is used for pipe jacking construction operations with different diameters. When in use, fine sand is filled in the first box body 2 and the second box body 1, reducing the weight of the back wall, accelerating the progress of pipe jacking construction, and after construction, it needs to be demolished and reused, reducing the construction cost.

[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the present practical embodiments, and they should all be covered within the scope of the claims and the description of the present invention.

[0096] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A recyclable back wall for pipe jacking construction, characterized in that, Comprising: A first box body (2), a first cavity is provided inside the first box body (2), and a first feeding hole (201) is opened at the upper end of the first box body (2); A second box body (1), a second cavity is provided inside the second box body (1), a jack matching the first box body (2) is opened on the side surface of the second box body (1), and a second feeding hole (101) is opened at the upper end of the second box body (1); A tension rod (6), the tension rod (6) penetrates through the first box body (2) and the second box body (1); A first tension hole (202) is opened on the first box body (2), a second tension hole (102) is opened on the second box body (1), and the tension rod (6) sequentially penetrates through the first tension hole (202) and the second tension hole (102); External threads are opened at both ends of the tension rod (6), nuts (7) are correspondingly provided at both ends of the tension rod (6), the nuts (7) are threadedly connected to the tension rod (6), and the two nuts (7) respectively press against the outer side walls of the first box body (2) and the second box body (1); A second discharge hole (103) is opened on the end surface of the second box body (1) far away from the jack, mounting plates two (104) are correspondingly provided at both ends of the second discharge hole (103), a slot is opened on the end surface of the mounting plate two (104) close to the second discharge hole (103), a second plug board (5) is provided inside the slot two, and the second plug board (5) is detachably connected to the mounting plate two (104), and the second plug board (5) is used to close the second discharge hole (103); Hand holes (501) are opened at both ends of the second plug board (5); A cover plate (4) is correspondingly provided for the second feeding hole (101) of the second box body (1), the cover plate (4) is used to close the second feeding hole (101), and the cover plate (4) is detachably connected to the second box body (1) through bolts; A vertical plate (8) is fixedly provided inside the second box body (1), the width of the vertical plate (8) matches the thickness of the second cavity, a support plate (9) is provided on the vertical plate (8), and the width of the support plate (9) matches the thickness of the second cavity; The support plate (9) is hinged to the vertical plate (8); A hinge block (802) is fixedly provided on the vertical plate (8), a hinge hole is opened on the hinge block (802), a hinge shaft (901) matching the hinge hole is fixedly provided on the support plate (9), and the hinge shaft (901) is located inside the hinge hole; A through hole (801) matching the tension rod (6) is opened on the vertical plate (8), and the tension rod (6) is located inside the barrel hole; 2. The reusable back wall for pipe jacking construction according to claim 1, characterized in that: A first discharge hole (203) is opened at the lower end of the first box body (2), a base is correspondingly provided for the first box body (2), a placement groove corresponding to the first box body (2) is opened on the base, and the depth of the placement groove is greater than the distance from the first discharge port to the lower end surface of the first box body (2); A first plug board (10) is correspondingly provided for the first feeding hole (201), the first plug board (10) is detachably connected to the first box body (2) through bolts, and there are multiple types of the first plug board (10), and the lengths of different types of the first plug board (10) are different; The first plug board (10) is used to close the first feeding hole (201).

3. The reusable back wall for pipe jacking construction according to claim 1, characterized in that: The upper ends of the first box body (2) and the second box body (1) are both provided with lifting rings (3).

4. A construction method for a recyclable back wall for pipe jacking construction according to any one of the above claims 1-3, characterized in that, It includes the following steps: S1. Select the corresponding assembly method according to the foundation pit size and the pipe jacking diameter, and assemble the first box body (2) and the second box body (1) into a back wall; S2. Place the assembled back wall at the designated position in the foundation pit, and the rear side wall of the back wall is closely attached to the inner wall of the foundation pit or the support structure; S3. Rotate the support plate (9) so that the support plate (9) corresponds to the position of the jack for pipe jacking construction; S4. Fill the first box body (2) and the second box body (1) with fine sand; S5. After use, hoist the back wall from the foundation pit to the designated position, open the second plug plate (5) to discharge the fine sand in the second box body (1), disassemble the back wall to discharge the fine sand in the first box body (2); S6. Transfer the first box body (2) and the second box body (1) to the storage position.

5. A construction method of a back wall for pipe jacking construction that can be recycled according to claim 4, characterized in that: The assembly methods include: Assemble using the first box body (2) alone. The lower end of the first box body (2) is installed in the placement groove, and there is a gap between the outer side wall of the first box body (2) and the inner side wall of the placement groove; The assembly method of two second box bodies (1). The jacking holes of the two second box bodies (1) are correspondingly arranged, and the two second box bodies (1) are connected by a tension rod (6); Assemble one first box body (2) and two second box bodies (1). The two ends of the first box body (2) are respectively installed inside the jacking holes of the two second box bodies (1); The corresponding relationship between the pipe jacking diameter and the assembly method is as follows: When the pipe jacking diameter is not greater than 80 cm, select the assembly method of using the first box body (2) alone; When the pipe jacking diameter is greater than 80 cm and less than 200 cm, select the assembly method of two second box bodies (1); When the pipe jacking diameter is not less than 200 cm or the jacking distance exceeds the threshold value, select the assembly method of one first box body (2) and two second box bodies (1).

6. A construction method of a recyclable back wall for pipe jacking construction according to claim 4, characterized in that: Step S4 includes the following steps: S401. Alternately fill the first box body (2) and the second box body (1) with fine sand, and the height difference of the fine sand in the first box body (2) and the second box body (1) does not exceed 30 cm; S402. After filling the fine sand, use a heavy object to knock on the back wall or an inserted vibrator to vibrate the fine sand to make the fine sand in the first box body (2) and the second box body (1) dense.

7. A construction method of a recyclable back wall for pipe jacking construction according to claim 4, characterized in that: In step S5, after use, hoist the back wall from the foundation pit above the hopper of the transport vehicle, open the second plug plate (5) to discharge the fine sand in the second box body (1), disassemble the back wall to discharge the fine sand in the first box body (2), and the fine sand flows into the hopper of the transport vehicle.

Images