Reinforcing construction structure for pipe jacking access hole

Abstract

A reinforcing construction structure for a jacking pipe access hole comprises a foundation pit pouring bottom wall, a reinforcing sleeve and a sealing washer, the foundation pit pouring bottom wall is arranged at the jacking pipe access hole in the bottom in a pipeline foundation pit, the inner diameter of the end, close to the hole, of the reinforcing sleeve is increased, and the sealing washer is arranged between the inner side of the end, close to the hole, of the reinforcing sleeve and a jacking pipe. A reinforcing steel sheet ring is arranged on the outer side of the reinforcing sleeve and the sealing washer at the hole, expansion screws are arranged on the reinforcing steel sheet ring by a circle corresponding to the pouring bottom wall of the foundation pit, and grouting pipes are arranged on the inner sides of the expansion screws by a circle corresponding to the pouring bottom wall of the foundation pit on the reinforcing steel sheet ring; a gap between the reinforcing sleeve and the jacking pipe in the hole is primarily sealed through the sealing gasket, one end of the reinforcing sleeve is positioned through the reinforcing steel sheet ring, the other end of the reinforcing sleeve is fixed through the positioning column, the stability of the hole is improved, the grouting pipe is arranged to inject slurry to the surrounding pouring bottom wall, the firmness of surrounding soil is improved, and the construction efficiency is improved. And soil collapse caused by long-time operation is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of pipe jacking tunnel construction, in particular to a pipe jacking tunnel entrance and exit construction structure. Background Art

[0002] As a trenchless tunnel construction method, the main working principle of the pipe jacking method is as follows: first, two foundation pits are dug at a certain distance on the ground, namely the pipe jacking launch pit and the receiving pit; then, in the launch pit, with the help of the jacking force generated by the jacking equipment, the friction between the pipeline and the surrounding soil is overcome, and the pipeline is pushed into the soil according to the designed slope. The soil is then transported away until the tool or tunnel boring machine is pushed into the receiving pit and lifted. At the same time, the pipeline is buried between the two pits. Among them, during pipe jacking construction, it is necessary to set a construction hole at the jacking working surface of the launch pit and the receiving pit. The diameter of the construction hole is slightly larger than the diameter of the pipe jacking. An annular cavity is formed between the construction hole and the pipeline to be buried. By injecting mud into the annular cavity to form a mud sleeve, the friction during the jacking of the buried pipeline can be reduced, making the pipeline jacking smoother. However, the existing construction openings of the launch silo and receiving silo are only reinforced by the reserved concrete curing, and their sealing and firmness are relatively low. They are easily damaged and become ineffective as the jacking construction progresses, which reduces the engineering quality of the jacking construction. In addition, in some geologically soft or sandy strata, soil collapse is prone to occur, and mud flows into the working pit, affecting the progress of the jacking construction. Summary of the Invention

[0003] The utility model aims to solve the deficiencies of the prior art and provides a jacking pipe inlet and outlet hole reinforcement construction structure.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0005] A reinforcement construction structure for a top pipe inlet and outlet hole, comprising a foundation pit casting bottom wall, a reinforcement sleeve, and a sealing gasket. The foundation pit casting bottom wall is arranged at the top pipe inlet and outlet hole at the bottom of the pipeline foundation pit, a reinforcement sleeve is arranged close to the wall at the hole hole, the inner diameter of the reinforcement sleeve at one end close to the hole hole is increased, a sealing gasket is arranged between the inner side of the end close to the hole hole and the top pipe, a reinforcement steel sheet ring is arranged at the hole hole outside the reinforcement sleeve and the sealing gasket, the reinforcement steel sheet ring extends to the foundation pit casting bottom wall, an expansion screw is arranged on the reinforcement steel sheet ring corresponding to the position of the foundation pit casting bottom wall, the reinforcement steel sheet ring is fastened to the foundation pit casting bottom wall by the expansion screw, a grouting pipe is arranged on the reinforcement steel sheet ring corresponding to the position of the foundation pit casting bottom wall inside the expansion screw, and an inner protective ring is arranged on the outer end of the sealing gasket at the inner wall of the reinforcement steel sheet ring.

[0006] The gap between the inner guard ring and the top pipe is provided with expansion rubber.

[0007] A plurality of positioning columns are arranged on the side wall of one end of the reinforcement sleeve away from the hole.

[0008] The inner side of the sealing gasket, which is close to the hole and in contact with the top pipe, is provided with a groove, and the inner protective ring is placed in the groove.

[0009] The beneficial effects of the utility model are as follows: the sealing gasket of the utility model preliminarily seals the gap between the reinforcement sleeve and the top pipe in the hole, the reinforcement steel ring is fixed to the bottom wall of the foundation pit by means of expansion screws, the reinforcement steel ring is at the outer end of the sealing gasket, and an inner protective ring is provided on the inner side of the reinforcement steel ring in the groove of the sealing gasket to protect the sealing gasket while positioning the sealing gasket, and the expansion rubber provided at the same time seals the outer end of the sealing gasket, thereby further improving the sealing performance, one end of the reinforcement sleeve is positioned by the reinforcement steel ring, and a positioning column is provided on the other end for fixing, thereby improving the stability of the hole, and a grouting pipe is provided to inject mud into the surrounding casting bottom wall, thereby improving the firmness of the surrounding soil and avoiding soil collapse during long-term operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural diagram of the utility model;

[0011] Figure 2 This is a schematic diagram of the outer end structure of the hole of the utility model;

[0012] Figure 3 for Figure 1 A partial enlarged schematic diagram of point A in the middle;

[0013] In the figure: 1 - bottom wall of foundation pit; 2 - jacking pipe; 3 - expansion screw; 4 - reinforcement steel ring; 5 - grouting pipe; 6 - reinforcement casing; 7 - inner retaining ring; 8 - expansion rubber; 9 - sealing gasket; 10 - positioning column;

[0014] The following is a detailed description of the embodiments of the present invention with reference to the accompanying drawings. DETAILED DESCRIPTION

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0016] A reinforcement construction structure for a top pipe inlet and outlet hole, comprising a foundation pit casting bottom wall 1, a reinforcement sleeve 6, and a sealing gasket 9. The foundation pit casting bottom wall 1 is arranged at the top pipe inlet and outlet hole at the bottom of the pipeline foundation pit, and a reinforcement sleeve 6 is arranged against the wall at the hole, and the inner diameter of the reinforcement sleeve 6 at one end close to the hole is increased, and a sealing gasket 9 is arranged between the inner side of the end close to the hole and the top pipe 2, and a reinforcement steel sheet ring 4 is arranged at the hole outside the reinforcement sleeve 6 and the sealing gasket 9, and the reinforcement steel sheet ring 4 extends to the foundation pit casting bottom wall 1, and an expansion screw 3 is arranged on the reinforcement steel sheet ring 4 corresponding to the position of the foundation pit casting bottom wall 1, and the reinforcement steel sheet ring 4 is fastened to the foundation pit casting bottom wall 1 by the expansion screw 3, and a grouting pipe 5 is arranged on the reinforcement steel sheet ring 4 corresponding to the position of the foundation pit casting bottom wall 1 and inside the expansion screw 3, and the outer end of the sealing gasket 9 is provided with an inner guard ring 7 at the inner wall of the reinforcement steel sheet ring 4.

[0017] An expansion rubber 8 is set in the gap between the inner retaining ring 7 and the top pipe 2. The expansion rubber 8 squeezes the inner wall side of the inner retaining ring 7, and the inner retaining ring 7 squeezes the inner diameter side of the reinforced steel ring 4. The expansion screw 3 positions the outer diameter side of the reinforced steel ring 4 to ensure that the reinforced steel ring 4 is firmly fixed.

[0018] A plurality of positioning columns 10 are provided on the side wall of the end of the reinforcement sleeve 6 away from the hole. The positioning columns 10 fix the inner end of the reinforcement sleeve 6 away from the hole. The outer end of the reinforcement sleeve 6 is limited by the reinforcement steel ring 4 to increase the stability of the reinforcement sleeve 6.

[0019] The inner side of the sealing gasket 9 near the hole end in contact with the top pipe 2 is provided with a groove, and the inner retaining ring 7 is placed in the groove, so that the inner retaining ring 7, the sealing gasket 9 and the reinforcing steel ring 4 are in a mutually squeezed state, thereby improving the sealing performance.

[0020] During application, a sealing gasket 9 is provided between the top pipe 2 and the reinforcement sleeve 6. The sealing gasket 9 can compensate for the gap between the hole and the top pipe 2, prevent mud from flowing into the working well from here, and achieve water stopping. By providing a reinforcement steel ring 4, the outer ends of the hole of the reinforcement sleeve 6 and the sealing gasket 9 are limited. The reinforcement steel ring 4 is fastened to the bottom wall 1 of the foundation pit by expansion screws, ensuring the stability of the reinforcement steel ring 4. The inner end of the hole of the reinforcement sleeve 6 is fixed by a positioning column 10, so that the stability of the reinforcement sleeve 6 on the inner side of the hole is achieved. At the same time, a grouting pipe 5 is provided on the reinforcement steel ring 4. The grouting pipe 5 injects mud into the soil around the hole, so that the soil around the hole forms a whole, improves the firmness of the soil around the hole, and avoids the collapse of the hole soil during operation.

[0021] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0023] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0024] The above is an exemplary description of the present invention in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the present invention, or they are directly applied to other occasions without improvement, they are all within the scope of protection of the present invention.

Claims

1. A reinforced construction structure for a jacking pipe inlet and outlet, characterized in that: The invention comprises a foundation pit casting bottom wall (1), a reinforcement sleeve (6), and a sealing gasket (9). The foundation pit casting bottom wall (1) is arranged at the top pipe inlet and outlet hole at the bottom of the pipeline foundation pit. A reinforcement sleeve (6) is arranged close to the wall at the hole. The inner diameter of the end of the reinforcement sleeve (6) close to the hole is increased. A sealing gasket (9) is arranged between the inner side of the end of the reinforcement sleeve (6) close to the hole and the top pipe (2). A reinforcement steel sheet ring (4) is arranged outside the reinforcement sleeve (6) and the sealing gasket (9) at the hole. The reinforcement steel sheet The ring (4) extends to the bottom wall (1) of the foundation pit casting. Expansion screws (3) are arranged on the reinforcing steel sheet ring (4) in a circle corresponding to the position of the bottom wall (1) of the foundation pit casting. The reinforcing steel sheet ring (4) is fastened to the bottom wall (1) of the foundation pit casting by the expansion screws (3). Grouting pipes (5) are arranged on the reinforcing steel sheet ring (4) in a circle inside the expansion screws (3) at the position of the bottom wall (1) of the foundation pit casting. The outer end of the sealing gasket (9) is provided with an inner protective ring (7) on the inner wall of the reinforcing steel sheet ring (4).

2. A pipe jacking entrance and exit reinforcement construction structure according to claim 1, characterized in that: An expansion rubber (8) is provided in the gap between the inner retaining ring (7) and the top pipe (2).

3. A pipe jacking entrance and exit hole reinforcement construction structure according to claim 2, characterized in that: A plurality of positioning columns (10) are provided on the side wall of the reinforcement sleeve (6) at one end away from the hole.

4. A pipe jacking entrance and exit hole reinforcement construction structure according to claim 3, characterized in that: The inner side of the sealing gasket (9) which contacts the top pipe (2) at one end close to the hole is provided with a groove, and the inner protective ring (7) is placed in the groove.

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