Concrete intermediate jacking station filling layer structure suitable for pipe jacking

Abstract

The utility model relates to a concrete intermediate jacking station filling layer structure suitable for pipe jacking. The concrete intermediate jacking station filling layer structure comprises a front sleeve body, a rear shell, flexible plastic, a movable hoop and a spring. The utility model has the beneficial effects that the sealing performance of the filling layer of the intermediate jacking station is obviously improved through the filling layer made of flexible plastics and the connection of the filling layer and the hydraulic channel. In this way, external soil is effectively prevented from invading the filling layer in the construction process, and therefore the continuity and stability of pipe jacking construction are guaranteed. Meanwhile, the stability of the whole structure is further enhanced through the stable supporting structure of the fixing rings and the fixing pieces, it is guaranteed that the side, making contact with the soil body, of the filling layer is flat, and it is avoided that external soil body is embedded into the seam to affect resetting of the jack.

Description

Technical Field

[0001] The utility model relates to the field of pipe jacking construction, and more specifically, to a concrete intermediate filling layer structure suitable for pipe jacking. Background Art

[0002] In pipe jacking construction, as the jacking distance increases, factors such as soil friction and the weight of the pipe cause the thrust required to increase significantly. The thrust provided by the main jacking cylinder gradually becomes insufficient to meet the requirements of long or ultra-long jacking distances. Therefore, relay chambers must be placed at appropriate locations in the tunnel to divide the long or ultra-long distances into several shorter sections for jacking. Steel relay chambers are primarily used in concrete pipe jacking construction. Under normal circumstances, relay chambers are not required for pipe jacking projects, and their utilization rate is extremely low. This results in a disproportionate high cost and actual utilization, resulting in a certain amount of resource waste. This is why concrete relay chambers came into being.

[0003] Patent CN 109595392 A proposes an F-type reinforced concrete relay jacking pipe, which is equipped with a retractable and oil-filled filling layer to prevent external soil or moisture from being embedded between the front sleeve and the rear insert. The filling layer is made of flexible and foldable material, and external soil is easily embedded in the folding seam, affecting the resetting of the jack. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a concrete intermediate filling layer structure suitable for jacking pipes. The technical solution is as follows: a front sleeve, a rear shell, a flexible plastic, a movable hoop and a spring;

[0005] In which, the interior of the front sleeve is provided with a ring hoop moving groove, and the movable ring hoop is provided in the ring hoop moving groove; the rear shell part is inserted into the front sleeve; the flexible plastic cloth is arranged between the opposite end faces of the front sleeve and the rear shell to form a filling layer; one end of the spring is fixed on the movable ring hoop, and the other end is fixed on the front sleeve, and is used to push the movable ring hoop away when the front sleeve and the rear shell approach each other to realize the contraction of the filling layer.

[0006] Preferably, it further comprises a fixing ring; the fixing ring is located in the cavity formed by the flexible plastic and is fixed to the top of the flexible plastic close to the end face of the front sleeve body.

[0007] Preferably, it further comprises: a fixing member; one end of the fixing member is connected to the fixing ring, and the fixing member and the rear shell form a triangle to fix the fixing ring.

[0008] Preferably, a hydraulic channel is provided inside the rear shell for injecting hydraulic oil into the filling layer.

[0009] Preferably, the front casing is a steel casing; and the rear casing is a reinforced concrete structure.

[0010] The beneficial effects of the utility model are:

[0011] 1. This utility model significantly improves the sealing performance of the intermediate filling layer through the flexible plastic filling layer and its connection to the hydraulic channel. This effectively prevents external soil from intruding into the filling layer during construction, thereby ensuring the continuity and stability of the pipe jacking construction. Furthermore, the stable support structure of the retaining ring and fixings further enhances the stability of the overall structure and ensures that the side of the filling layer in contact with the soil is flat, preventing external soil from embedding in the gap and affecting the reset of the jack.

[0012] 2. By providing a movable hoop and spring, this utility model provides excellent adaptability and adjustability to the filling layer. During the jacking process, the movable hoop can adjust its position according to the relative movement between the front and rear shells, achieving expansion or contraction of the filling layer. This design not only adapts to complex working conditions during construction, but also ensures that the filling layer maintains a good seal.

[0013] 3. The filling layer provided by the present invention has good sealing and stability, which reduces construction interruption and repair work caused by soil intrusion, thereby improving construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 Schematic diagram of a concrete intermediate filling layer structure suitable for pipe jacking;

[0015] Description of reference numerals: front casing 1 , rear casing 2 , flexible plastic 3 , fixing ring 4 , fixing member 5 , movable hoop 6 , spring 7 . DETAILED DESCRIPTION

[0016] The present invention will be further described below with reference to the following embodiments. The following embodiments are provided solely to facilitate understanding of the present invention. It should be noted that, within the scope of the present invention, modifications may be made by a person skilled in the art without departing from the principles of the present invention. Such improvements and modifications are also within the scope of the claims of the present invention.

[0017] As an embodiment, the present application provides a concrete intermediate filling layer structure suitable for jacking pipes. The technical solution is as follows, including: a front sleeve 1, a rear shell 2, a flexible plastic 3, a fixing ring 4, a fixing part 5, a movable hoop 6 and a spring 7.

[0018] The front casing 1 is a steel casing, which is welded and fixed to the steel cage inside the pipe segment. A hoop moving groove is provided inside the front casing 1, and the movable hoop 6 is provided in the hoop moving groove.

[0019] The rear housing 2 is a reinforced concrete structure, partially inserted into the front housing 1. The flexible plastic 3 is arranged between the opposing end surfaces of the front housing 1 and the rear housing 2, and partially within the hoop's movable groove, forming a filling layer. A hydraulic channel is provided within the rear housing 2 for injecting hydraulic oil into the filling layer to prevent soil from entering.

[0020] The retaining ring 4 is located within the cavity formed by the flexible plastic 3 and is fixed to the top of the flexible plastic 3 near the end face of the front casing 1. This design enhances the stability of the top of the filling layer, preventing deformation or displacement under high pressure. It also ensures that the side of the filling layer in contact with the soil is flat, preventing external soil from embedding in the gap and affecting the jack's reset. One end of the fixing member 5 is connected to the retaining ring 4. The fixing member 5 forms a triangle with the rear casing 2 to secure the retaining ring 4. The triangular fixing structure ensures that the retaining ring 4 is more securely fixed, maintaining its stability even under extreme working conditions.

[0021] The flexible plastic 3 bypasses the movable hoop 6, and the movement of the movable hoop 6 can achieve the stretching of the filling layer, thereby preventing external soil from entering the gap and affecting the resetting of the jack when the front casing 1 and the rear casing 2 move away from each other.

[0022] One end of the spring 7 is fixed on the movable hoop 6, and the other end is fixed on the front housing 1, and is used to push the movable hoop 6 away to achieve filling layer contraction when the front housing 1 and the rear housing 2 approach each other.

Claims

1. A concrete intermediate filling layer structure suitable for pipe jacking, characterized in that: include: A front casing (1), a rear casing (2), a flexible plastic (3), a movable hoop (6) and a spring (7); The front sleeve (1) is provided with a ring hoop movable groove inside, and the movable ring hoop (6) is provided in the ring hoop movable groove; the rear shell (2) is partially inserted into the front sleeve (1); the flexible plastic (3) is arranged between the opposite end faces of the front sleeve (1) and the rear shell (2) to form a filling layer; one end of the spring (7) is fixed on the movable ring hoop (6), and the other end is fixed on the front sleeve (1), and is used to push the movable ring hoop (6) away when the front sleeve (1) and the rear shell (2) are close to each other to achieve the contraction of the filling layer.

2. The concrete intermediate filling layer structure suitable for pipe jacking according to claim 1, characterized in that: It also includes a fixing ring (4); the fixing ring (4) is located in the cavity formed by the flexible plastic (3) and is fixed on the top of the flexible plastic (3) close to the end surface of the front sleeve body (1).

3. The concrete intermediate filling layer structure suitable for pipe jacking according to claim 2, characterized in that: Also includes: A fixing member (5); one end of the fixing member (5) is connected to the fixing ring (4), and the fixing member (5) and the rear housing (2) form a triangle to fix the fixing ring (4).

4. The concrete intermediate filling layer structure suitable for pipe jacking according to claim 3, characterized in that: A hydraulic channel is provided inside the rear housing (2) for injecting hydraulic oil into the filling layer.

5. The concrete intermediate filling layer structure suitable for pipe jacking according to claim 4, characterized in that: The front casing (1) is a steel casing; the rear casing (2) is a reinforced concrete structure.

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