Construction method for closed receiving and disassembled hoisting of large-section rectangular pipe

Abstract

The application provides a construction method for closed receiving and disassembled hoisting of a large-section rectangular pipe, and relates to the technical field of underground passage construction. The construction method is characterized in that a sinking receiving well is arranged on the floor of a closed receiving station to ensure smooth entry of the pipe, then the front shell and the rear shell of the pipe are received and disassembled in batches, and finally the disassembled shells are transported to the working well one by one and hoisted out. The application is suitable for the case that the receiving end of the pipe construction does not have direct hoisting conditions, or the receiving position is a closed narrow space without a reserved hoisting hole. Through the construction method, the floor sinking design solves the technical problem of the difficulty of the large-section pipe entering the closed station, and the batch receiving and disassembly of the front shell and the rear shell of the pipe machine solves the technical problem that the length space in the station cannot meet the integral receiving. The up-down disassembly of the front shell and the rear shell and the transportation and hoisting out one by one solve the safety problem of the transportation and hoisting out in the narrow space of the station.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of underground passage construction, in particular to a construction method for closed receiving and disassembly hoisting of large-section rectangular pipe jacking. BACKGROUND

[0002] In a traffic complex and congested traffic system, some non-planar traffic network channels are penetrated, mainly referring to underground pedestrian walkways. Pedestrians can pass through in large quantities, quickly and safely, solving the problems of pedestrian traffic congestion and safety in large cities, and beautifying the city landscape.

[0003] When the underground passage is connected with the double-layer underground closed station, the following problems mainly exist in the process of pipe jacking construction in the underground passage:

[0004] 1. The pipe jacking receiving well is arranged in the main structure of the closed station, the middle plate of the closed station structure is flush with the bottom of the passage, and it is difficult for the pipe jacking to enter the station.

[0005] 2. Due to the need of opening the station road, the station roof has been closed, and after the pipe jacking machine is topped to the receiving well, it cannot be directly lifted out.

[0006] In view of the above problems, the present application provides a construction method for closed receiving and disassembly hoisting of large-section rectangular pipe jacking. SUMMARY

[0007] The present application aims to provide a construction method for closed receiving and disassembly hoisting of large-section rectangular pipe jacking, which not only solves the problem of difficulty in entering the station, but also solves the problem of the pipe jacking machine being unable to be lifted out.

[0008] The embodiment of the present application is implemented as follows:

[0009] The present application provides a construction method for closed receiving and disassembly hoisting of large-section rectangular pipe jacking, comprising the following steps:

[0010] Station receiving position positioning: determining the pipe jacking receiving part of the closed station, sinking the structure floor slab of the receiving part to reserve the receiving well, and installing the receiving base;

[0011] Pipe jacking machine receiving: when the pipe jacking machine head cutter tip is topped to the outside of the retaining wall, the M pipe joints at the rear of the shield tail are connected as a whole, and the front shell of the pipe jacking machine head at the hole door is waterproofed;

[0012] Hole door removal and cleaning: the main reinforcement on the soil side is reserved, and the protective layer, main reinforcement and retaining wall concrete inside the hole door retaining wall are sequentially broken, so that when the pipe jacking machine is topped to the main reinforcement on the soil side and appears to be stressed, the screw machine is started to excavate;

[0013] The front shield body of the pipe jacking machine is received: the height of the receiving base is adjusted to meet the entry of the front shield of the pipe jacking machine, the pipe jacking machine is advanced to the receiving end steel ring surface at the connection between the front and rear shields, the screw machine, the motor and the electric box are sequentially removed from the inside of the pipe jacking machine, the gear oil is sucked out through the oil suction pump, the front shell body is pushed forward to be separated from the rear shell body by using the articulated oil cylinder and the small jacking iron;

[0014] The front shield body of the pipe jacking machine is hoisted: a support platform is built above the front shield shell, the front shield shell is lifted up by using the oil cylinder, and the lower pit is filled flat, the filling surface is placed on the roller shaft, the front shield body falls on the roller shaft, the connection structure of the front upper shell body and the front lower shell body is disassembled, the front upper shell body is lifted up by using the oil cylinder and is fixed on the support platform, the front lower shell body is moved to the right by using the roller shaft and the winch, and after the support platform is disassembled, the front upper shell body falls on the roller shaft and is moved to the right by using the winch.

[0015] The rear shield body of the pipe jacking machine is received: the pipe jacking machine is pushed forward to the receiving end, the N pipe joints at the starting end are connected into one, the shield tail and the pipe joint are separated, the shield tail is completely pushed out of the hole, and the water stopping process is applied around the first ring and the last ring pipe joint.

[0016] The rear shield body of the pipe jacking machine is hoisted: a support platform is built above the rear shield shell, the rear shield shell is lifted up by using the oil cylinder, and the lower pit is filled flat, the filling surface is placed on the roller shaft, the rear shield body falls on the roller shaft, the connection structure of the rear upper shell body and the rear lower shell body is disassembled, the rear upper shell body is lifted up by using the oil cylinder and is fixed on the support platform, the rear lower shell body is moved to the right by using the roller shaft and the winch, and after the support platform is disassembled, the rear upper shell body falls on the roller shaft and is moved to the right by using the winch.

[0017] The pipe shell is transported and hoisted out: the rear lower shell body, the rear upper shell body, the front lower shell body and the front upper shell body are translated and turned to the pipe channel opening, and are transferred from the hole to the starting well opening and hoisted out vertically.

[0018] Compared with the prior art, the embodiments of the present application have at least the following advantages or beneficial effects:

[0019] (1) The first aspect of the pipe receiving well is arranged in the main structure of the station, the middle plate of the station structure is flush with the top of the channel, so that the pipe is difficult to enter the station, by the construction method, the middle plate at the pipe receiving position of the closed station is sunk and modified, so that the horizontal height of the middle plate is lower than the pipe, so that the pipe can enter the station, and the problem of difficulty of large-section pipe entering the narrow station is solved.

[0020] (2) The second aspect, since the receiving well is arranged in a narrow station, since the caliber of the pipe jacking machine and the caliber of the large-section pipe jacking are basically consistent, it is difficult to enter the station, and the pipe jacking machine after construction cannot be lifted out of the receiving well. Through the construction method, the pipe jacking machine is disassembled in batches and lifted out of the starting well through the tunnel, solving the problem that the pipe jacking machine cannot be lifted in the narrow station.

[0021] (3) Through the pulling mode of the roller shaft and the winch, the front upper shell, the front lower shell, the rear upper shell and the rear lower shell are moved in the tunnel to the starting well and lifted out, the disassembly and transportation process is simpler and more practical. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0023] Figure 1 Construction schematic diagram for receiving the pipe jacking machine of the embodiment of the present application;

[0024] Figure 2 Construction plan view for receiving the front shield shell of the pipe jacking machine of the embodiment of the present application;

[0025] Figure 3 Construction side view for receiving the front shield shell of the pipe jacking machine of the embodiment of the present application;

[0026] Figure 4 Construction side view for disassembling the front shield shell of the pipe jacking machine of the embodiment of the present application; Figure 1 ;

[0027] Figure 5 Construction side view for disassembling the front shield shell of the pipe jacking machine of the embodiment of the present application; Figure 2 ;

[0028] Figure 6 Construction side view for disassembling the upper and lower shells of the pipe jacking machine of the embodiment of the present application;

[0029] Figure 7 Construction plan view for disassembling the front shield shell of the pipe jacking machine of the embodiment of the present application.

[0030] Legend: 1 - cutter head, 2 - front shell, 3 - rear shell, 4 - steel plate, 5 - jack, 6 - roller shaft, 7 - pipe joint. DETAILED DESCRIPTION

[0031] In the description of the embodiments of the present application, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating the orientation or positional relationship are the orientation or positional relationship of the product of the present application when it is usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0032] In addition, if the terms "horizontal", "vertical", "overhanging" and the like appear, they do not mean that the component must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0033] In the description of the embodiments of the present application, "a plurality of" represents at least 2.

[0034] In the description of the embodiments of the present application, it should be noted that unless otherwise explicitly specified and limited, if the terms "arrangement", "installation", "connection", "connection" appear, they should be understood in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between the two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0035] Embodiment

[0036] Please refer to Figures 1-7 The embodiment provides a construction method for closed receiving and disassembled hoisting of a large-section rectangular pipe, comprising the following steps:

[0037] Positioning of station receiving position: determining the pipe receiving part of the closed station, sinking design is performed on the structure floor of the receiving part. In actual construction, the sinking height of the structure floor is generally 950mm, which can satisfy the smooth entry of the pipe into the station, and can also be beneficial to the lifting of the height space. The receiving base is installed in the sinking reserved receiving well, so that the height after the sinking of the structure floor is lower than the lower side of the pipe machine, so that the pipe machine can enter the upper side of the structure floor.

[0038] The pipe jacking machine receives: when the pipe jacking machine head tip reaches the outside of the diaphragm wall, the last M pipe sections are connected into one, in actual construction, the pipe jacking machine head tip reaches the position about 20 cm outside of the diaphragm wall, and stops, after stopping, the last 5 pipe sections are welded with steel bars, the front shell of the pipe jacking machine head at the hole portal is injected with yellow mud, and a 3 cubic meter water stop hoop is constructed, the hole portal is reinforced, and emergency materials and equipment are prepared; and the front shell of the pipe jacking machine head at the hole portal is constructed to stop water.

[0039] The hole portal is chiseled and cleaned: the main reinforcement on the soil side is reserved, and the protective layer, main reinforcement and diaphragm wall concrete inside the diaphragm wall at the hole portal are sequentially broken, so that when the pipe jacking machine is pushed forward to the main reinforcement on the soil side and force appears, the screw machine is started to excavate soil;

[0040] In the above embodiment, the protective layer inside the diaphragm wall at the hole portal is first broken by a manual hand-held air pick, the inside main reinforcement is cut by gas cutting, the diaphragm wall concrete is then broken from top to bottom by the air pick assisted PC120 gun machine, the main reinforcement on the soil side is reserved, after the diaphragm wall concrete is completely broken, the concrete in the receiving pit is excavated, then the pipe jacking machine is started to rotate the cutter head, the outer diaphragm wall reinforcement is cut when the pipe jacking machine is pushed forward to the main reinforcement on the soil side and force appears, the diaphragm wall broken section is leveled, and the screw machine is started to excavate soil.

[0041] The front shield body of the pipe jacking machine is received: the pipe jacking machine continues to push forward, and after the front shield body enters the diaphragm wall, the pushing forward is temporarily stopped, the receiving base height is adjusted according to the pipe jacking into the station elevation to satisfy the front shield entering the receiving well base, after the base height adjustment is completed, the pipe jacking machine continues to push forward to the front and rear shield connection to reach the receiving end steel ring surface, the screw machine, motor and electric box are sequentially removed from the inside of the pipe jacking machine, the gear oil is pumped out using an oil suction pump, the front shell body is pushed forward 70 cm and separated from the rear shell body using a hinged oil cylinder and a small jacking iron.

[0042] The front shield body of the pipe jacking machine is hoisted: a support platform is built above the front shield body, the front shield body is lifted using an oil cylinder, and the lower pit is filled to be flat, a roller is placed on the flat surface, the front shield body falls onto the roller, the connection structure of the front upper shell body and the front lower shell body is disassembled, the front upper shell body is lifted using an oil cylinder and fixed on the support platform, the front lower shell body is moved to the right using a roller and a winch, after the support platform is removed, the front upper shell body falls onto the roller, and the front upper shell body is moved to the right through the winch;

[0043] In the above embodiment, four 200t oil cylinders are placed at the left front, left rear, right front and right rear of the front shield shell respectively, and the four 200t oil cylinders are used for multi-direction jacking, which is more stable. The bottom steel plate of the oil cylinder is supported on the receiving pit bottom, the cylinder body is connected and fixed with the middle plate by using section steel and expansion bolts, four 200T jacks are used to jack up the front shell body by 1m, the lower pit is leveled with the surrounding middle plate surface by using I-shaped steel and steel plate, and the front shell body is placed on the Ф50 roller shaft, the front upper shell body is jacked up by 0.6m and then temporarily lifted by using the steel support platform, the front lower shell body is moved to the right by using the lower steel plate, roller shaft and winch, the front upper shell body is jacked up, and after the steel support is removed, the front upper shell body is moved to the right.

[0044] The rear shield shell of the pipe jacking machine is received: the pipe jacking machine is jacked forward to the receiving end, N pipe joints at the starting end are connected as a whole, and in actual construction, N can be 5, so that the receiving end shield tail and the pipe joint are separated, the shield tail is completely pushed out of the hole, and the water stopping process is applied around the first ring and the last ring pipe joint;

[0045] In the above embodiment, the extension jacking iron is enabled to restore the pipe jacking, and after the shield tail enters the receiving end side wall by 200mm, the pipe joint is jacked to the designed position, the jacking is stopped, and the continuous 5 pipe joints at the starting end are welded with steel bars; the receiving end cuts the connecting steel bars between the shield tail and the pipe joint, starts the pipe separation oil cylinder and the pad iron, separates the shield tail from the pipe joint, and completely pushes the shield tail out of the hole by about 10cm, and the reserved grouting holes around the first ring and the last ring pipe joint are used to pressurize polyurethane to block the gap between the pipe joint and the side wall embedded steel ring, so that there is no obvious water leakage at the hole.

[0046] Hoisting of the rear shield shell of the pipe jacking machine: a support platform is built above the rear shield shell, the rear shield shell is jacked up by using the oil cylinder, the lower pit is filled flat, the filled surface is placed on the roller shaft, the rear shield shell is placed on the roller shaft, the connection structure of the rear upper shell body and the rear lower shell body is removed, the rear upper shell body is jacked up and fixed on the support platform by using the oil cylinder, the rear lower shell body is moved to the right by using the roller shaft and winch, and after the support platform is removed, the rear upper shell body is placed on the roller shaft, and the rear upper shell body is moved to the right by using the winch;

[0047] In the above embodiment, four 200t oil cylinders are placed at the left front, left rear, right front and right rear of the rear shield shell respectively, the bottom steel plate of the oil cylinder is supported on the receiving pit bottom, the cylinder body is connected and fixed with the middle plate by using section steel and expansion bolts, four 200T jacks are used to lift the rear shell body upward by 1m, the lower pit is padded flat with I-shaped steel and steel plate to be flush with the surrounding middle plate surface, the steel plate surface is placed with a Ф50 roller, the rear shell body is placed on the roller, four 200T jacks are used to lift the rear upper shell body upward by 0.6m, and a temporary overhead type steel support platform is erected to temporarily support it, the rear lower shell body is moved to the right by using the lower steel plate, roller and winch, the rear upper shell body is lifted upward by using the jack, the type steel support is removed and then the rear upper shell body is lowered and moved to the right.

[0048] The rear lower shell body, the rear upper shell body, the front lower shell body and the front upper shell body are translated and turned to the top pipe passage opening, and are transferred from the hole to the starting well opening and hoisted vertically out.

[0049] In the above embodiment, the rear lower shell body, the rear upper shell body, the front lower shell body and the front upper shell body are translated and turned to the top pipe passage opening by using steel plate, roller, jack, winch and forklift in turn.

[0050] Through the construction method, the first aspect is that the top pipe receiving well is arranged in the main structure of the station, the middle plate of the station structure is flush with the top of the passage, so that it is difficult for the top pipe to enter the station, through the construction method, the middle plate at the top pipe receiving position of the closed station is sunk and modified, so that the horizontal height of the middle plate is lower than the top pipe, so that the top pipe can enter the station, and the problem that the large-section top pipe cannot enter the narrow station is solved. The second aspect is that since the receiving well is arranged in the narrow station, it is difficult for the caliber of the top pipe machine and the caliber of the large-section top pipe to enter the station, and the top pipe machine after construction cannot be hoisted out of the receiving well, through the construction method, the top pipe machine is disassembled in batches and hoisted out of the starting well through the tunnel, so that the problem that the narrow station cannot hoist the top pipe machine is solved.

[0051] The pit under the front shell body 2 or the rear shell body 3 is padded flat by the I-shaped steel and the steel plate 4, so that the rolling surface of the roller 6 is a plane, facilitating the movement of the front upper shell body, the front lower shell body, the rear upper shell body or the rear lower shell body; and the construction method of padding and flattening the pit by the I-shaped steel and the steel plate 4 has the advantages of simple construction method and low cost.

[0052] The jack 5 is a hydraulic jack 5, which is a jack 5 using a plunger or a hydraulic cylinder as a rigid lifting piece. It has the advantages of simple structure, light weight, easy to carry and convenient to move.

[0053] The number of the rollers 6 is multiple, which are sequentially laid along the moving direction of the front and rear housings 3, so as to ensure that the front and rear housings 3 can slide on the rollers 6 by the winch to the starting well and finally be hoisted out of the starting well. The construction mode of the front and rear housings 3 by the winch and the rollers 6 has the advantages of simplicity and practicability.

[0054] In some embodiments of the present application, during the hole portal drilling and cleaning process, when the screw machine is started to excavate, the seepage and mud leakage of the receiving well portal of the screw machine are observed. If seepage occurs, the polyurethane sealing head and the gap between the reinforcement interval are injected and extruded.

[0055] In some embodiments of the present application, during the receiving process of the front shield housing of the pipe jacking machine, after the front shield housing of the pipe jacking machine enters the diaphragm wall, the seepage and mud leakage of the portal are checked. If seepage occurs, the polyurethane is injected to seal the gap between the front shield and the diaphragm wall.

[0056] The above is only the preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A construction method for closed receiving and disassembled hoisting of a large-section rectangular pipe, characterized in that, The method comprises the following steps: Receiving position positioning of the station: determining a receiving position of the pipe jacking in the closed station, reserving a receiving well in the structure floor sinking reconstruction of the receiving position, and installing a receiving base; Pipe jacking machine receiving: when the pipe jacking machine head is jacked to the outside of the diaphragm wall, M pipe joints behind the tail shield are connected into one, and water stopping construction is performed on the front shell of the pipe jacking machine head at the hole portal; Hole portal removal and cleaning: the main reinforcement on the soil-facing side is reserved, and the soil-facing side protection layer, main reinforcement and diaphragm wall concrete are sequentially removed, so that the pipe jacking machine is jacked forward to the main reinforcement on the soil-facing side, and the screw machine is started to excavate soil when the main reinforcement is under stress; Pipe jacking machine front shield body receiving: the height of the receiving base is adjusted to meet the entry of the pipe jacking machine front shield, the pipe jacking machine is advanced to the receiving end steel ring surface at the connection position of the front shield and the rear shield, the screw machine, motor and electric box are sequentially removed from the inside of the pipe jacking machine, the gear oil is sucked out through the oil suction pump, the front shell body is jacked forward to be separated from the rear shell body by using the articulated oil cylinder and the small jacking iron; Pipe jacking machine front shield body hoisting: a support platform is built above the front shield shell, the front shield shell is jacked up by using the oil cylinder, the lower pit is filled flat, the front shield shell is placed on the roller shaft after the flat surface is filled, the connection structure of the front upper shell body and the front lower shell body is removed, the front upper shell body is jacked up by using the oil cylinder and is fixed on the support platform, the front lower shell body is moved to the right by using the roller shaft and the winch, and the front upper shell body is moved to the right by using the winch after the support platform is removed; Pipe jacking machine rear shield body receiving: the pipe jacking machine is jacked forward to the receiving end, N pipe joints at the starting end are connected into one, the receiving end tail shield and the pipe joints are separated, the tail shield is separated from the pipe joints and is completely pushed out of the hole portal, and the water stopping process is applied around the first ring and the last ring pipe joints; Pipe jacking machine rear shield body hoisting: a support platform is built above the rear shield shell, the rear shield shell is jacked up by using the oil cylinder, the lower pit is filled flat, the rear shield shell is placed on the roller shaft after the flat surface is filled, the connection structure of the rear upper shell body and the rear lower shell body is removed, the rear upper shell body is jacked up by using the oil cylinder and is fixed on the support platform, the rear lower shell body is moved to the right by using the roller shaft and the winch, and the rear upper shell body is moved to the right by using the winch after the support platform is removed; Pipe jacking shell body transportation and hoisting: the rear lower shell body, the rear upper shell body, the front lower shell body and the front upper shell body are translated and turned to the pipe jacking passage portal, and are transferred from the hole to the starting well portal and are vertically hoisted out.

2. The construction method of claim 1, wherein, During the hole portal removal and cleaning process, when the screw machine is started to excavate soil, the seepage and mud leakage of the screw machine and the receiving well hole portal are observed, the polyurethane is injected to block the gap between the front shield and the diaphragm wall ring if seepage occurs, and the compacted reinforcement is injected.

3. The construction method of claim 1, wherein, During the pipe jacking machine front shield body receiving process, after the front shield body of the pipe jacking machine enters the diaphragm wall, the seepage and mud leakage of the hole portal are checked, the polyurethane is injected to block the gap between the front shield and the diaphragm wall ring if seepage occurs.

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