Spiral positioning support system for supporting sleeve in pipe jacking construction

Abstract

The spiral positioning support system comprises an outer jacking pipe, a spiral lantern ring is arranged in the outer jacking pipe, a lower supporting leg arranged at the bottom of the outer jacking pipe in a supported mode is arranged on the lower portion of the spiral lantern ring, an upper sliding groove is formed in the inner wall of the outer jacking pipe, and an upper hanging bracket clamped in the upper sliding groove in a sliding mode is arranged on the upper portion of the spiral lantern ring. The device has the beneficial effects that a traditional concrete cushion layer is replaced with the spiral lantern ring, a good guiding and positioning effect on the inner sleeve can be guaranteed through a channel formed by the spiral lantern ring, the spiral lantern ring is machined and manufactured in advance, directly welded and lengthened on site and then jacked into the outer jacking pipe, installation and operation are convenient and fast, and the operation progress is greatly accelerated; left-right symmetrical supporting legs are arranged on the lower portion of the spiral lantern ring, meanwhile, a support used for lifting is connected over the supporting legs, a lower-supporting and upper-pulling action structure is formed for the spiral lantern ring, good stability and coaxiality of the spiral lantern ring can be guaranteed, and the situation that the spiral lantern ring is bent to affect operation quality is avoided.

Description

Technical Field

[0001] This application belongs to the field of underground pipe jacking construction technology, specifically relating to a spiral positioning support system for casing support in pipe jacking construction, used to achieve coaxial positioning and stable support of the pipe jacking and the casing. Background Technology

[0002] With the rapid development of urban infrastructure construction, pipe jacking technology has been widely used in pipeline laying projects for water supply, drainage, gas, and communications. Pipe jacking has advantages such as not disrupting surface traffic, low noise, and short construction period, and has become the mainstream technology for trenchless construction of underground pipelines.

[0003] In traditional pipe jacking construction, the positioning between the inner casing and the reinforced concrete outer jacking pipe is mostly achieved by using a cast-in-place concrete pad. This process has problems such as low positioning accuracy, long construction time, and unsafe manual pipe entry operations, which can easily lead to steel pipe displacement or uneven concrete pouring. Utility Model Content

[0004] The purpose of this application is to provide a spiral positioning support system for casing support in pipe jacking construction. Through the synergistic effect of spiral steel rings, lower positioning steel legs and T-shaped suspending supports, the inner casing and outer jacking pipe are ensured to be coaxial, while reducing jacking friction resistance and improving construction efficiency and structural stability.

[0005] The objective of this application is achieved through the following technical solution:

[0006] A spiral positioning support system for casing support in pipe jacking construction includes an outer jacking pipe, a spiral collar inside the outer jacking pipe, a lower support leg at the bottom of the spiral collar, an upper sliding groove on the inner wall of the outer jacking pipe, and an upper hanger at the top of the spiral collar that is slidably engaged in the upper sliding groove.

[0007] Furthermore, the outer jacking pipe is a JCCP pipe, and the spiral collar is a spiral-shaped steel bar.

[0008] Furthermore, the outer jacking pipe and the spiral collar are arranged concentrically.

[0009] Furthermore, the spiral collar comprises several sections, with adjacent spiral collar sections welded together.

[0010] Furthermore, the lower support legs include a left lower support leg and a right lower support leg, which are arranged symmetrically from left to right.

[0011] Furthermore, the lower support leg includes a first support leg and a second support leg, with the first support leg and the second support leg connected to form an X-shaped structure.

[0012] Furthermore, both the first leg and the second leg are inverted trapezoidal structures.

[0013] Furthermore, the upper sliding groove has a T-shaped structure.

[0014] Furthermore, the upper hanger is arranged along the symmetrical direction of the outer jacking pipe.

[0015] Furthermore, the upper hanger includes an upper sliding base plate and ribs. The upper sliding base plate slides and is engaged in the upper sliding groove. Several ribs are arranged at intervals on the upper sliding base plate. The upper ends of the ribs extend into the upper sliding groove and are connected to the upper sliding base plate. The lower ends of the ribs are connected to the spiral collar.

[0016] The beneficial effects of this application are:

[0017] (1) By replacing the traditional concrete pad with a spiral collar, the channel formed by the spiral collar itself can ensure a good guiding and positioning effect on the inner sleeve. Furthermore, the spiral collar is pre-processed and manufactured, and can be directly welded and extended on site before being pushed into the outer jacking pipe. The installation and operation are convenient and greatly speed up the work progress.

[0018] (2) The lower part of the spiral collar is equipped with symmetrical support legs, and the upper part is connected to the lifting bracket, which forms a structure of lower support and upper pull for the spiral collar, which can ensure the good stability and coaxiality of the spiral collar itself, and avoid the spiral collar bending itself from affecting the work quality.

[0019] The aforementioned main solution and its various further alternatives can be freely combined to form multiple solutions, all of which are solutions that can be adopted and are claimed in this application; furthermore, the (non-conflicting alternatives) can also be freely combined with each other and with other alternatives. Those skilled in the art, after understanding this solution, will realize from the prior art and common general knowledge that there are many combinations, all of which are technical solutions to be protected in this application, and will not be exhaustively listed here. Attached Figure Description

[0020] Figure 1 This is a three-dimensional view of the structure from the top front of this application (excluding the right side of the outer jacking pipe).

[0021] Figure 2 This is a three-dimensional view of the structure from the right side of this application (with the right side of the outer jacking pipe removed).

[0022] Figure 3 This is a three-dimensional view of the structure from the lower front of this application (excluding the right side of the outer jacking pipe).

[0023] In the diagram: 1-outer jacking pipe, 2-spiral collar, 3-lower support leg, 4-upper sliding groove, 5-upper hanger; 301-lower left support leg, 302-lower right support leg, 303-first support leg, 304-second support leg, 501-upper sliding base plate, 502-rib. Detailed Implementation

[0024] The present application will be further described below with reference to specific embodiments and accompanying drawings.

[0025] Example 1

[0026] refer to Figures 1-3 As shown, a spiral positioning support system for casing support in pipe jacking construction includes an outer jacking pipe 1, a spiral collar 2, a lower support leg 3, an upper sliding groove 4, and an upper hanger 5.

[0027] The outer jacking pipe 1 is the outermost supporting and protective pipe. A spiral collar 2 is installed inside the outer jacking pipe 1, which assists in the jacking operation of the inner sleeve, provides a supporting foundation, and achieves guiding positioning. The spiral collar 2 is formed by a spiral rod, creating a space inside for the inner sleeve to pass through. The diameter of this space is slightly larger than the diameter of the inner sleeve, allowing the inner sleeve to pass through.

[0028] The lower part of the spiral collar 2 is provided with a lower support leg 3 supported at the bottom of the outer jacking pipe 1. The lower support leg 3 is fixed to the lower part of the spiral collar 2 and is placed on the bottom of the inner wall of the outer jacking pipe 1 to provide an upward support force for the spiral collar 2 and ensure that the spiral collar 2 is placed stably.

[0029] The inner wall of the outer jacking pipe 1 is provided with an upper sliding groove 4, and the upper part of the spiral collar 2 is provided with an upper hanger 5 that is slidably locked in the upper sliding groove 4. The upper hanger 5 is fixed to the upper part of the spiral collar 2 and slidably placed in the upper sliding groove 4 to provide an upward pulling force for the spiral collar 2 and ensure that the spiral collar 2 is placed stably.

[0030] The lower support leg 3 and the upper slide groove 4 together provide support for the spiral collar 2, pulling it upward. Before the inner sleeve is pushed in, the spiral collar 2 is pushed into the outer jacking pipe 1 in advance. The lower support leg 3 enters by friction at the bottom of the outer jacking pipe 1, and the upper hanger 5 enters by friction in the upper slide groove 4.

[0031] To facilitate the jacking of the spiral collar and inner sleeve, lubricant, such as lubricating oil or polymer grease, can be applied to the spiral collar 2, lower support leg 3, upper sliding groove 4, and inner sleeve to reduce friction. Subsequently, the spiral collar 2, lower support leg 3, and upper hanger 5 are all embedded in concrete, which also improves the overall strength of the concrete structure.

[0032] The outer jacking pipe 1 is a JCCP pipe, which is driven into the soil layer on site using jacking equipment. The outer jacking pipe 1 and the spiral collar 2 are arranged concentrically.

[0033] The spiral collar 2 is a spiral steel bar. The steel bar is easy to obtain on site, and the spiral collar does not separate the internal space of the outer jacking pipe 1, ensuring that the subsequent concrete can be poured in one go.

[0034] The spiral collar 2 consists of several sections, with adjacent sections welded together. During the jacking operation, the spiral collar 2 is extended by welding and gradually enters the outer jacking pipe 1. The overlap length of the spiral collar 2 is not less than 10d (the diameter of the reinforcing bar), and the distance between two adjacent points on the same layer height of the spiral collar 2 is 300mm.

[0035] The lower support leg 3 includes a left lower support leg 301 and a right lower support leg 302. The left lower support leg 301 and the right lower support leg 302 are arranged symmetrically on both sides and are directly welded and fixed to the spiral collar 2. The symmetrical arrangement of the lower support legs 3 on both sides provides stable support for both sides of the spiral collar 2. Both the left lower support leg 301 and the right lower support leg 302 are made of steel bars. At regular intervals, two sets of lower positioning steel bars are welded along the pipe direction (axial direction) of the spiral collar 2. The symmetrical arrangement achieves even distribution of force and plays a role in positioning and support, ensuring that the outer jacking pipe 1 and the inner sleeve are coaxial.

[0036] The lower support leg 3 includes a first support leg 303 and a second support leg 304. Specifically, both the left lower support leg 301 and the right lower support leg 302 include a first support leg 303 and a second support leg 304. Both the first support leg 303 and the second support leg 304 are inverted trapezoidal structures. The bottom of the inverted trapezoidal structure contacts the inner wall of the outer jacking pipe 1. In order to match the curvature of the inner wall of the outer jacking pipe 1, the bottom of the inverted trapezoidal structure can also be designed with a corresponding curvature.

[0037] The extended sections on both sides of the upper base of the inverted trapezoidal structure of the first leg 303 and the second leg 304 are directly welded to the spiral collar 2. The first leg 303 and the second leg 304 are welded together to form an X-shaped structure. The first leg 303 and the second leg 304 are cross-connected to form an integral support leg that can provide good load-bearing support.

[0038] The upper chute 4 is a T-shaped structure that runs along the entire length of the outer jacking pipe 1 and is arranged along the symmetrical direction of the outer jacking pipe 1. The upper chute 4 is pre-reserved during the prefabrication of the outer jacking pipe 1 and does not need to be opened on site. During on-site construction, the upper scaffold 5 can be directly slid into place.

[0039] The upper hanger 5 is arranged along the symmetrical line of the outer jacking pipe 1 to ensure that the pulling direction of the upper hanger 5 is in the middle. At the same time, the spiral collar 2 is arranged coaxially, so that the pulling direction of the upper hanger 5 coincides with the gravity of the spiral collar 2, ensuring that the pulling action does not deviate and achieving an effective pulling action.

[0040] The upper bracket 5 is a suspended intermittent T-shaped rib structure, including an upper sliding base plate 501 and ribs 502. The upper sliding base plate 501 of the T-shaped top seat is a continuous long strip thin plate as the supporting base plate. The upper sliding base plate 501 slides and is locked in the upper sliding groove 4.

[0041] A number of ribs 502 are arranged at intervals on the upper sliding base plate 501. A number of upright cuboid ribs are arranged at intervals along the length direction on the surface of the base plate. Each rib 502 intersects the base plate perpendicularly to form a local T-shaped cross section. The upper end of the rib 502 extends into the upper sliding groove 4 and is welded to the upper sliding base plate 501. The lower end of the rib 502 is welded to the spiral collar 2.

[0042] The workflow of this application is as follows: construction preparation, installation of jacking equipment and positioning of the external jacking direction.

[0043] External jacking: Use jacks to push the outer external jacking pipe into the predetermined position.

[0044] Installation support system: The T-shaped tie rod is slid into the outer jacking pipe along the slide groove, and the spiral steel ring and the lower positioning steel are pushed in simultaneously to form an overall support structure.

[0045] Insert the inner sleeve: Push the inner sleeve (steel pipe) into the sleeve along the spiral steel bar ring, and use the X-shaped positioning steel bar to correct the coaxiality.

[0046] Concrete pouring: Concrete is poured between the steel pipe and the casing to form a pipe-in-pipe composite structure.

[0047] The foregoing basic examples and their further alternative examples can be freely combined to form multiple embodiments, all of which are embodiments that can be adopted and claimed in this application. In the scheme of this application, each alternative example can be arbitrarily combined with any other basic example and alternative example.

[0048] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A spiral positioning support system for casing support in pipe jacking construction, comprising an outer jacking pipe (1), characterized in that: The outer jacking pipe (1) is provided with a spiral collar (2), the lower part of the spiral collar (2) is provided with a lower support leg (3) supported at the bottom of the outer jacking pipe (1), the inner wall of the outer jacking pipe (1) is provided with an upper sliding groove (4), and the upper part of the spiral collar (2) is provided with an upper hanger (5) that is slidably locked in the upper sliding groove (4).

2. The spiral positioning support system for casing support in pipe jacking construction according to claim 1, characterized in that: The external jacking pipe (1) is a JCCP pipe, and the spiral collar (2) is a spiral steel bar.

3. The spiral positioning support system for casing support in pipe jacking construction according to claim 1 or 2, characterized in that: The outer jacking pipe (1) and the spiral collar (2) are arranged concentrically.

4. The spiral positioning support system for casing support in pipe jacking construction according to claim 1, characterized in that: The spiral collar (2) comprises several sections, and adjacent spiral collar sections (2) are welded together.

5. The spiral positioning support system for casing support in pipe jacking construction according to claim 1, characterized in that: The lower support leg (3) includes a left lower support leg (301) and a right lower support leg (302), which are arranged symmetrically from left to right.

6. The spiral positioning support system for casing support in pipe jacking construction according to claim 1 or 5, characterized in that: The lower support leg (3) includes a first support leg (303) and a second support leg (304), and the first support leg (303) and the second support leg (304) are connected to form an X-shaped structure.

7. The spiral positioning support system for casing support in pipe jacking construction according to claim 6, characterized in that: The first leg (303) and the second leg (304) are both inverted trapezoidal structures.

8. The spiral positioning support system for casing support in pipe jacking construction according to claim 1, characterized in that: The upper sliding groove (4) is a T-shaped structure.

9. The spiral positioning support system for casing support in pipe jacking construction according to claim 1, characterized in that: The upper hanger (5) is arranged along the symmetrical line of the outer jacking pipe (1).

10. The spiral positioning support system for casing support in pipe jacking construction according to claim 1 or 9, characterized in that: The upper hanger (5) includes an upper sliding base plate (501) and ribs (502). The upper sliding base plate (501) slides and is locked in the upper sliding groove (4). Several ribs (502) are arranged at intervals on the upper sliding base plate (501). The upper end of the rib (502) extends into the upper sliding groove (4) and connects with the upper sliding base plate (501). The lower end of the rib (502) is connected to the spiral collar (2).

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