Pipe joint retaining structure for pipe jacking method construction

Abstract

A pipe joint retaining structure for pipe jacking method construction comprises a steel sleeve, a retaining support, a retaining bolt and a pipe joint, the steel sleeve is arranged at a pipe jacking starting hole, the retaining support is arranged on the steel sleeve, a retaining hole is formed in the position, corresponding to the retaining support, of the pipe joint, and the retaining bolt is detachably and sequentially inserted into the retaining support and the retaining hole. According to the utility model, the retaining bolt is inserted into the retaining support and the retaining hole, so that the pipe piece is prevented from being jacked back to the starting section by water and soil pressure, the operation is simple and convenient, and the retaining construction efficiency of the pipe jacking section can be greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a pipe jacking construction technical field especially relates to a pipe jacking construction pipe joint retreat structure. BACKGROUND

[0002] With the development of city, city land resource is more and less, and city construction is more and more dependent on the development of underground space. Subway liaison passage is a transverse passage arranged between two subway tunnels, mainly adopts mechanical pipe jacking construction, and mainly plays the role of safe evacuation of passengers, tunnel drainage, fire prevention, ventilation and the like.

[0003] In the process of increasing pipe joint, after the retraction of the jack for applying jacking force, the rear end of the assembled pipe joint has no jacking force, and the self weight of the pipe joint cannot overcome the water and soil pressure of the excavation face, so that the assembled pipe joint is retracted to the direction of the starting working well under the action of water and soil pressure. The existing pipe jacking retreat technology needs to set pre-buried steel plates on the well wall of the pipe jacking machine starting working well and the pipe joint, and when the pipe jacking pipe joint is excavated and the jack needs to be retracted, the steel plates on the well wall of the working well and the pre-buried steel plates on the pipe joint are connected into a whole by flange or welding. This retreat method needs to connect or weld the steel plates, which is complex and time-consuming. UTILITY MODEL CONTENT

[0004] The utility model discloses a pipe jacking construction pipe joint retreat structure, which can simplify the retreat operation mode and greatly improve the pipe jacking pipe joint retreat construction efficiency.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the technical scheme of a pipe jacking construction pipe joint retreat structure, which comprises a steel sleeve, a retreat support, a retreat bolt and a pipe joint.

[0006] As a further improvement of the utility model, the retreat support comprises a connecting seat and a plug-in sleeve, the connecting seat is fixed on the steel sleeve, the plug-in sleeve is fixed on the connecting seat, and the retreat bolt is detachably plugged into the plug-in sleeve.

[0007] As a further improvement of the utility model, the fixing parts between the connecting seat and the steel sleeve and between the plug-in sleeve and the connecting seat are respectively provided with stiffening rib plates.

[0008] As a further improvement of the utility model, the retreat support is arranged on the outer side wall of the end of the steel sleeve.

[0009] As a further improvement of the utility model, the anti-falling chain is connected between the retreat preventing bolt and the retreat preventing support.

[0010] As a further improvement of the utility model, the steel sleeve is filled with thick mud slurry.

[0011] As a further improvement of the utility model, the steel sleeve box is further included, the steel sleeve box covers the retreat preventing hole, a connecting steel plate is arranged on the steel sleeve box, and the connecting steel plate is fixed on the outer wall of the pipe joint through the peg.

[0012] As a further improvement of the utility model, the rear sealing steel plate is welded on the steel sleeve box and flush with the outer wall of the pipe joint, and the rear sealing steel plate is filled with mortar between the steel sleeve box.

[0013] As a further improvement of the utility model, at least one hoop is arranged around the retreat preventing hole in the pipe joint.

[0014] The utility model discloses the beneficial effects that in the utility model, the retreat preventing bolt is inserted on the retreat preventing support and the retreat preventing hole, so that the pipe piece is prevented from being pushed back to the original section by water and soil pressure, simple and convenient operation can greatly improve the pipe jacking pipe joint retreat construction efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is whole structure schematic diagram of the utility model;

[0016] Figure 2 It is retreat preventing hole plugging schematic diagram of the utility model;

[0017] Mark explanation: steel sleeve 1, retreat preventing support 2, connecting seat 21, insertion sleeve 22, stiffened rib plate 23, retreat preventing bolt 3, anti-falling chain 31, pipe joint 4, retreat preventing hole 41, hoop 42, steel sleeve box 5, connecting steel plate 51, peg 52, rear sealing steel plate 6, mortar 7. DETAILED DESCRIPTION

[0018] The utility model will be further described in connection with specific embodiment and drawing.

[0019] As Figure 1 Shown, a kind of pipe jacking construction pipe joint retreat structure, including steel sleeve 1, retreat preventing support 2 and retreat preventing bolt 3 and pipe joint 4.

[0020] Steel sleeve 1 is arranged on the position of pipe jacking original hole, and thick mud slurry is filled in steel sleeve 1. Pipe jacking machine starts and passes through steel sleeve 1, and by filling thick mud slurry, it can guarantee internal and external water and soil pressure balance when pipe jacking machine starts, to guarantee that sand gushing phenomenon does not appear on working face.

[0021] The retreat-preventing support 2 is fixed on the outer wall of the end of the steel sleeve 1 to provide the reaction force for preventing the pipe segment from retreating. The retreat-preventing support 2 comprises a connecting seat 21 and a plug-in sleeve 22, the connecting seat 21 is fixed on the steel sleeve 1, and the plug-in sleeve 22 is fixed on the connecting seat 21. The fixing positions between the connecting seat 21 and the steel sleeve 1 and between the plug-in sleeve 22 and the connecting seat 21 are respectively provided with stiffening rib plates 23 to enhance the structural strength of the retreat-preventing support 2.

[0022] The pipe segment 4 is provided with a retreat-preventing hole 41 at the position corresponding to the retreat-preventing support 2, and the retreat-preventing pin 3 is detachably plugged into the plug-in sleeve 22 of the retreat-preventing support 2 and the retreat-preventing hole 41 in sequence. Through the cooperation of the retreat-preventing hole 41, the retreat-preventing pin 3 and the retreat-preventing support 2, the pipe segment 4 can be effectively prevented from retreating. In addition, since the retreat-preventing pin 3 can be detached from the retreat-preventing support 2 and the retreat-preventing hole 41, in order to prevent the retreat-preventing pin 3 from being lost or falling off, the anti-falling chain 31 is connected between the retreat-preventing pin 3 and the retreat-preventing support 2.

[0023] In order to enhance the structural strength of the retreat-preventing hole 41, a steel sleeve box 5 is further provided, which covers the retreat-preventing hole 41, and the steel sleeve box 5 is provided with a connecting steel plate 51, which is fixed on the outer wall of the pipe segment 4 by means of a bolt 52. In addition, at least one ring of stirrups 42 is further provided around the retreat-preventing hole in the pipe segment to enhance the structural strength of the pipe segment at the position of the retreat-preventing hole.

[0024] The use process of the above structure is as follows: during pipe jacking construction, the jacking jack applies jacking force to the pipe segment 4 through the reaction device and its own elongation. When the excavation reaches the length of a pipe segment 4, the pin is inserted into the retreat-preventing hole 41 of the retreat-preventing support 2 and the pipe segment 4 to prevent the pipe segment 4 from retreating, thereby achieving the purpose of retreat prevention. At this time, the jacking jack is retracted and the main machine related pipeline is disconnected, and then the new pipe segment 4 is assembled. After the new pipe segment 4 is assembled, the jacking jack is re-jacked to the newly assembled pipe segment 4, the pipeline is reconnected, and the jacking force is provided by the jacking jack to balance the water and soil pressure of the excavation face. At this time, the retreat-preventing pin 3 can be removed, and then the retreat-preventing hole 41 is plugged. After the retreat-preventing hole 41 is plugged, the pipe jacking can be resumed.

[0025] As shown in Figure 2 The retreat-preventing hole 41 is plugged by means of a back sealing steel plate 6 and mortar 7, the back sealing steel plate 6 is welded on the steel sleeve box 5 and flush with the outer wall of the pipe segment 4, and the mortar 7 is filled between the back sealing steel plate 6 and the steel sleeve box 5. The retreat-preventing hole 41 is plugged to ensure the structural strength and service life of the formed pipe segment 4.

[0026] The above examples are only used to facilitate the illustration of the present application, and any person skilled in the art can make equivalent examples by making partial changes or modifications within the scope of the technical features disclosed in the present application without departing from the technical features of the present application, and the equivalent examples still belong to the scope of the technical features of the present application.

Claims

1. A pipe joint retreat-preventing structure for pipe jacking construction, characterized in that: The utility model relates to a steel sleeve, a retreat stop support and a retreat stop bolt and a pipe joint, the steel sleeve is arranged at the position of the pipe starting hole, the retreat stop support is arranged on the steel sleeve, the pipe joint is provided with a retreat stop hole at the position corresponding to the retreat stop support, and the retreat stop bolt is detachably inserted into the retreat stop support and the retreat stop hole in sequence. The utility model further comprises a steel sleeve box, the steel sleeve box covers the retreat stop hole, the steel sleeve box is provided with a connecting steel plate, the connecting steel plate is fixed on the outer wall of the pipe joint through a bolt. The pipe joint is provided with at least one hoop around the retreat stop hole.

2. The pipe jacking construction pipe joint retreat prevention structure according to claim 1, characterized in that: The retreat stop support comprises a connecting seat and an insertion sleeve, the connecting seat is fixed on the steel sleeve, the insertion sleeve is fixed on the connecting seat, and the retreat stop bolt is detachably inserted into the insertion sleeve.

3. The pipe jacking construction pipe joint retreat prevention structure according to claim 2, characterized in that: The fixed positions between the connecting seat and the steel sleeve and between the insertion sleeve and the connecting seat are respectively provided with stiffening rib plates.

4. The pipe jacking construction pipe joint retreat prevention structure according to claim 1, characterized in that: The retreat stop support is arranged on the outer side wall of the end of the steel sleeve.

5. The pipe jacking construction pipe joint retreat prevention structure according to claim 1, characterized in that: A drop-preventing chain is connected between the retreat stop bolt and the retreat stop support.

6. The pipe jacking construction pipe joint retreat prevention structure according to claim 1, characterized in that: The steel sleeve is filled with thick mud slurry.

7. The pipe jacking construction pipe joint retreat prevention structure according to claim 1, characterized in that: The utility model further comprises a rear sealing steel plate, the rear sealing steel plate is welded on the steel sleeve box and flush with the outer wall of the pipe joint, and the rear sealing steel plate and the steel sleeve box are filled with mortar.

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