A temporary water-stopping method for initial construction of bite-jointed pipe jacking

Abstract

The present invention provides a temporary water-stopping method for the construction of an interlocking jacking pipe, including temporary water-stopping for the start of a pilot pipe, temporary water-stopping for the start of a combined pipe body, temporary water-stopping for the start of a subsequent combined pipe body, and a construction emergency water-stopping method. When the pilot pipe is started, the curtain rubber plate is lifted up as the jacking pipe is advanced, and the curtain rubber plate is bent in the direction of advancement of the jacking pipe. Under the action of mud and water pressure in the excavation gap, the overlapped part of the curtain rubber plate and the jacking pipe structure is pressed tightly against the jacking pipe structure, thereby playing a water-stopping role. Before the combined pipe body is started, a part of the cylindrical starting ring frame of the pilot pipe and a part of the curtain rubber plate are removed, so that the remaining cylindrical starting ring frame and the starting ring frame of the corresponding interlocking jacking pipe box body are combined to form a starting ring frame of the combined pipe body, and the curtain rubber plate of the combined pipe body is installed for temporary water-stopping when the combined pipe body is started.

Description

Technical Field

[0001] The invention belongs to the field of tunnel engineering, can be applied to the initial construction of bite-jointed jacking pipes, and particularly relates to a temporary water-stopping method for the initial construction of bite-jointed jacking pipes. Background Art

[0002] With the continuous advancement of urbanization in my country, the number of large-span, shallow-buried tunnels is increasing. These tunnels, increasingly underpassing railways, roads, subway stations, and other structures, place increasing demands on settlement control during tunnel construction. Therefore, a dark-bored tunnel construction method with a circular pre-excavation and advanced support cycle has been proposed. This method utilizes multiple pipe jacking machines arranged along the tunnel's circumference to create a pre-support structure for the tunnel's excavation strokes. The cutterheads of adjacent pipe jacking machines overlap and interlock their excavation profiles.

[0003] During the initial construction of a pipe jacking or shield machine, water and mud inrush are significant construction risks, and measures should be taken to mitigate these risks before the project begins. In situations where external water pressure is high, temporary waterstops made of rubber cord are used during the initial construction phase.

[0004] The interlocking pipe jacking system is a newly proposed construction device widely used in tunnel construction using the build-before-cut method. Based on the requirements for interlocking pipe jacking construction orientation and the connection of adjacent interlocking pipes, a first pilot pipe 1-1 and a second pilot pipe 1-2 are installed at each end of the interlocking pipe jacking system. Then, a combined pipe body 2 is advanced. The first and second guide pipes 2-1 and 2-2 at each end of the combined pipe body are longitudinally connected to the already constructed pilot pipe. As the combined pipe body advances, the first and second pilot pipes 1-1 and 1-2 are pushed out and replaced by the first and second guide pipes 2-1 and 2-2 connected to the combined pipe body.

[0005] According to the construction process characteristics of the bite pipe jacking, the starting sequence of the bite pipe jacking is that the pilot pipes on both sides start first, and then the combined pipe body starts. Therefore, the starting water-stop requirements of the bite pipe jacking are:

[0006] 1. The first pilot pipe 1-1 and the second pilot pipe 1-2 enter through the tunnel door and continue until the pilot pipe is fully constructed. Generally, the pilot pipe is a circular pipe, so the existing technology of flap curtain rubber sheet and other methods can be used to temporarily stop the water;

[0007] 2. When the combined pipe body is pushed forward, the temporary water-stop devices 1-3 of the first pilot pipe and the temporary water-stop devices 1-4 of the second pilot pipe on the side close to the combined pipe body need to be removed, and the water-stop devices that completely cover the pipe body need to be installed;

[0008] 3. If Figure 1If the combined pipe body continues to be extended, the next section of the combined pipe body 3 will be pushed forward. The second guide pipe 2-2 of the previously constructed combined pipe body 2 must be pushed out and replaced with the third guide pipe 3-1 of the later constructed combined pipe body. At this time, the waterproofing device of the second guide pipe part needs to be removed, and the temporary waterproofing of the previously constructed combined pipe body must be extended to the subsequent combined pipe body. The third guide pipe 3-1 and the fourth guide pipe 3-2 are located at both ends of the later constructed combined pipe body.

[0009] 4. The initial construction of a slit pipe jacking differs from the initial construction requirements of existing shield tunneling technologies. During the slit pipe jacking process, slurry is continuously maintained outside the pipe to reduce friction. The initial waterstop for the combined pipe jacking should remain effective until the combined pipe jacking is completed. To reduce construction risks, it is necessary to design a temporary waterstop method suitable for the initial construction of a slit pipe jacking. Summary of the Invention

[0010] The purpose of the present invention is to overcome the defects of the existing technology and provide a temporary water-stopping method for the initial construction of bite-jacking pipes, which can better solve the problem of temporary water-stopping in bite-jacking pipe construction and effectively reduce construction risks. The present invention at least solves some of the problems in the existing technology.

[0011] The present invention is achieved in that:

[0012] The present invention provides a temporary water stopping method for the initial construction of a bite pipe jacking, including temporary water stopping by a pilot pipe and temporary water stopping by a combined pipe body.

[0013] The temporary water stop for the pilot pipe launch is made of a rubber sheet. A cylindrical launch ring frame is provided on the side wall of the launch working pit. The rubber sheet is fixed on the cylindrical launch ring frame. When the pilot pipe is launched, the rubber sheet is lifted up as the jacking pipe advances. The rubber sheet is bent in the direction of the jacking pipe. Under the action of the muddy water pressure in the excavation gap, the overlapped part of the rubber sheet and the jacking pipe structure is pressed tightly against the jacking pipe structure, thereby playing a water-stopping role.

[0014] After the pilot pipe is pushed in, the combined pipe body is constructed. The combined pipe body includes a guide pipe and a bite-type jacking box. The guide pipe is connected to the pilot pipe one by one.

[0015] Before the combined pipe body is launched, part of the cylindrical launching ring frame and part of the cord rubber sheet are removed, so that the remaining cylindrical launching ring frame and the corresponding launching ring frame of the bite top pipe box body form a combined pipe body launching ring frame, and the cord rubber sheet of the combined pipe body is installed for temporary water stopping at the launch of the combined pipe body.

[0016] Furthermore, before the subsequent construction of the combined pipe body, it is necessary to remove the ring frame of the constructed pipe body under water-free conditions, install the subsequent combined pipe body curtain rubber plate, and use the rubber bag installed around the constructed pipe body to increase pressure and temporarily block the external water.

[0017] Furthermore, the rubber bag is arranged in such a manner that the rubber bag of the later constructed pipe body is installed on the inner side of the rubber bag of the earlier constructed pipe body.

[0018] Furthermore, the shape of the rubber bag: the rubber bag of the pilot pipe is a circular ring wrapped around the pilot pipe steel pipe, the rubber bag of the combined pipe body alone is a closed wavy shape, and the rubber bag of the subsequent construction pipe body in the continuous combined pipe body is an open wavy rubber bag, and should overlap with the cord rubber sheet or the constructed rubber bag.

[0019] Furthermore, the rubber bag is located within the cuttable range of the jacking pipe and is cut by the cutter head during the jacking pipe construction.

[0020] Furthermore, when the combined pipe body continues to extend in the circumferential direction, when the subsequent combined pipe body starts, the guide pipe on one side thereof needs to be advanced along the trajectory of a previously constructed guide pipe. The temporary water-stopping method for the subsequent combined pipe body is the same as that for the previous combined pipe body, using a cord rubber plate and a rubber bag for water-stopping. Before the subsequent combined pipe body starts, a part of the starting ring frame of the previous combined pipe body and a part of the cord rubber plate of the previous combined pipe body are removed, and the remaining part of the starting ring frame of the previous combined pipe body is connected to the starting ring frame of the subsequent combined pipe body. The cord rubber plate corresponding to the subsequent combined pipe body is connected to the cord rubber plate remaining after removal for temporary water-stopping of the subsequent combined pipe body. During this construction, since the circumferential integrity of the starting water-stopping device of the previous combined pipe body is destroyed, the rubber bag of the previous combined pipe body needs to be pressurized and the rubber bag is used for temporary water-stopping.

[0021] Furthermore, in the previous combined pipe body, a rubber bag extending along the longitudinal direction of the ejecting pipe is pre-buried at the overlapping position of the guide pipe to be ejected and the engaging ejecting pipe box.

[0022] Furthermore, in the face of an emergency water-stopping situation, a reserved freezing pipeline is set on the side wall of the starting working well to freeze the outer circle stratum when the rubber bag and the curtain rubber plate fail to waterproof at the same time.

[0023] The present invention has the following beneficial effects:

[0024] 1. The present invention proposes a temporary water-stopping method for the initial construction of a bite-type jacking pipe, which includes four parts: a temporary water-stopping method for the initial construction of a pilot pipe, a temporary water-stopping method for the initial construction of a combined pipe body, a subsequent temporary water-stopping method for the initial construction of a combined pipe body, and a construction emergency water-stopping method. It mainly relies on rubber bags and curtain rubber plates for water-stopping, and pre-buries frozen pipes for emergency water-stopping.

[0025] 2. The temporary water-stopping method for the initial construction of the interlocking jacking pipe proposed in the present invention combines the structural characteristics and construction sequence of the combined interlocking jacking pipe, and sets a multi-channel combined water-stopping structure staggered front and back, so that each part of the combined interlocking jacking pipe has a closed ring-shaped initial water-stopping structure when it is initially constructed, thereby ensuring the water-stopping effect.

[0026] 3. The temporary water-stopping method for initial construction of interlocking pipe jacking proposed in the present invention can form a relatively sealed space for the pipe jacking, meeting the anti-seepage requirements of groundwater and muddy water pipe jacking in pipe jacking construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 A schematic diagram of the interlocking pipe jacking construction process provided by an embodiment of the present invention (interlocking and overlapping of the later-constructed pipe jacking with the earlier-constructed pipe jacking);

[0029] Figure 2 Schematic diagram of the plan layout of the temporary water-stopping device for the pilot pipe launching construction provided by an embodiment of the present invention (the arrow represents the direction of pipe jacking);

[0030] Figure 3 A schematic diagram of the cross-sectional layout of a temporary water-stopping device for initial construction of a combined pipe body provided by an embodiment of the present invention;

[0031] Figure 4 Schematic diagram of the plan layout of the temporary water-stopping device for the initial construction of the combined pipe body provided by an embodiment of the present invention (the arrow represents the direction of pipe jacking);

[0032] Figure 5 A schematic diagram of the cross-sectional arrangement of a temporary water-stopping device for initial construction of a subsequent combined pipe body provided by an embodiment of the present invention;

[0033] Figure 6 A schematic diagram of the planar layout of a temporary water-stopping device for the initial construction of a subsequent combined pipe body provided by an embodiment of the present invention (the arrow represents the direction of pipe jacking);

[0034] Figure 7 A schematic diagram of the cross-sectional arrangement of a single pilot conduit provided in an embodiment of the present invention;

[0035] Figure 8 A schematic diagram of the cross-sectional arrangement of grouped interlocking jacking pipes provided in an embodiment of the present invention (taking three steel pipes as a group as an example);

[0036] Figure 9 A plan view of a single-pipeline jacking process according to an embodiment of the present invention (arrows represent the direction of jacking);

[0037] Figure 10A plan view of the initial jacking of the grouped interlocking jacking pipes provided in an embodiment of the present invention (the arrows represent the direction of jacking pipe advancement).

[0038] In the figure: first pilot tube 1-1, second pilot tube 1-2, first pilot tube temporary water stop device 1-3, first cord rubber plate 1-3-1, first rubber bladder 1-3-2, first cylindrical starting ring frame 1-3-3, second pilot tube temporary water stop device 1-4, second cord rubber plate 1-4-1, second rubber bladder 1-4-2, second cylindrical starting ring frame 1-4-3, combined pipe body 2, first guide tube 2-1, second guide tube 2-2, bite top tube box body 2-3, third cord Fabric rubber sheet 2-3-1, third rubber bladder 2-3-2, combined pipe body starting ring frame 2-3-3, fourth rubber bladder 2-3-4, next section of combined pipe body 3, third guide pipe 3-1, fourth guide pipe 3-2, reserved freezing pipeline 4; single pilot pipe 5, single guide pipe 6, combined pipe body 7 connected to the single guide pipe, pipe jacking machine cutter head 7-1, rubber bladder 8 of the bite pipe group, fourth fabric rubber sheet 5-3-1, fifth rubber bladder 5-3-2, third cylindrical starting ring frame 5-3-3. DETAILED DESCRIPTION

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0040] like Figures 1-6The embodiment of the present invention provides a temporary water-stopping method for the construction of a bite-type jacking pipe, including temporary water-stopping for the pilot pipe and temporary water-stopping for the combined pipe body. The temporary water-stopping for the pilot pipe adopts a curtain rubber plate. A cylindrical starting ring frame is provided on the side wall of the starting working pit. The curtain rubber plate is fixed on the cylindrical starting ring frame. When the pilot pipe is started, the curtain rubber plate is lifted up as the jacking pipe is advanced. The curtain rubber plate is bent in the direction of the jacking pipe advancement. Under the action of the mud and water pressure in the excavation gap, the overlapped part of the curtain rubber plate and the jacking pipe structure is connected to the jacking pipe structure. The structures are compressed tightly to achieve a water-stopping effect. After the pilot pipe is jacked, the combined pipe body is constructed. The combined pipe body includes a guide pipe and an interlocking jacking pipe box 2-3. The guide pipe is connected to the pilot pipe in a one-to-one correspondence. Before the combined pipe body 2 is launched, a portion of the cylindrical launch ring frame and a portion of the rubber sheet are removed from the pilot pipe. The remaining cylindrical launch ring frame is combined with the launch ring frame of the corresponding interlocking jacking pipe box 2-3 to form the combined pipe body launch ring frame 2-3-3. The rubber sheet of the combined pipe body is installed to temporarily stop the water flow during the launch of the combined pipe body. During the removal of the pilot pipe ring frame and the installation of the rubber sheet of the combined pipe, an external rubber bag is used to seal the external groundwater. The type of rubber bag for the external temporary water sealing is determined by the condition of the constructed pipe body.

[0041] Before the subsequent construction of the combined pipe body, it is necessary to remove the ring frame of the constructed pipe body under water-free conditions, install the subsequent combined pipe body curtain rubber plate, and use the rubber bag installed around the constructed pipe body to apply pressure to temporarily block the external water. The arrangement of the rubber bag: the rubber bag of the later constructed pipe body is installed on the inner side of the rubber bag of the earlier constructed pipe body (the inside and outside are distinguished by the orientation relative to the working well, the one closer to the free surface of the working well is the inside, and the one closer to the soil outside the working well is the outside). The shape of the rubber bag: the rubber bag of the pilot pipe is a ring around the pilot pipe steel pipe, the rubber bag of the combined pipe body alone is a closed wavy shape, and the rubber bag of the later constructed pipe body in the continuous combined pipe body is an open wavy rubber bag, and should overlap with the curtain rubber plate or the already constructed rubber bag. The rubber bag is located within the range that can be cut by the jacking pipe and is cut by the cutter head during the jacking pipe construction.

[0042] The temporary water-stopping of the pilot tube also uses a rubber bag, which is fixed in the groove reserved in the side wall of the working well. The rubber bag of the pilot tube is set at the end of the side wall of the working well away from the working well. The rubber bag has no contact with the pilot tube when it is not pressurized. When the rubber bag is needed to stop water, the rubber bag is filled with pressurized medium (water or air, etc.) to pressurize the rubber bag until it is pressed tightly against the outer wall of the pilot tube. The water-stopping effect is adjusted by adjusting the pressure in the rubber bag. When dismantling the cylindrical starting ring frame and connecting the curtain rubber plate, since the circumferential integrity of the pilot tube starting water-stop device is destroyed, it is necessary to pressurize the rubber bag at the pilot tube and use the rubber bag for temporary water-stopping.

[0043] like Figure 4The third rubber bladder 2-3-2, used for temporary waterstopping at the start of the combined pipe body, is located between the pilot pipe rubber bladder and the third rubber sheet 2-3-1 of the combined pipe body. The pilot pipe rubber bladders comprise the first rubber bladder 1-3-2 and the second rubber bladder 1-4-2. The rubber bladders used for temporary waterstopping at the start of the combined pipe body are fixed in grooves reserved in the side walls of the working pit.

[0044] When the combined pipe body continues to extend in the circumferential direction, when the subsequent combined pipe body starts, the guide pipe on one side thereof needs to be advanced along the trajectory of a previously constructed guide pipe. The temporary water-stopping method for the subsequent combined pipe body is the same as that for the previous combined pipe body, using cord rubber plates and rubber bags for water-stopping. The rubber bags of the two adjacent combined pipe bodies are staggered front and back in the receiving direction. The cord rubber plates and rubber bags are installed on the starting ring frame of the subsequent combined pipe body. Before the subsequent combined pipe body starts, a part of the starting ring frame 2-3-3 of the previous combined pipe body and a part of the cord rubber plates of the previous combined pipe body are removed. The remaining part of the starting ring frame of the previous combined pipe body is connected to the starting ring frame of the subsequent combined pipe body, and the cord rubber plates corresponding to the subsequent combined pipe body are connected to the cord rubber plates remaining after removal for temporary water-stopping of the subsequent combined pipe body. During this construction, since the circumferential integrity of the starting water-stopping device of the previous combined pipe body is destroyed, the rubber bags of the previous combined pipe body need to be pressurized and the rubber bags are used for temporary water-stopping.

[0045] When the subsequent combined pipe body is pushed forward, the integrity of the rubber bag of the previous combined pipe body in the annular direction will be destroyed, and there is a risk of water stopping. In the previous combined pipe body, Figure 6 A fourth rubber bag 2-3-4 extending longitudinally along the jacking pipe is embedded in the joint between the guide pipe to be ejected (first guide pipe 2-1) and the engaging jacking pipe box 2-3 to prevent water seepage from the joint. The longitudinal direction is the direction in which the jacking pipe is pushed forward.

[0046] Construction emergency water-stopping method: In the face of emergency water-stopping situation, a reserved freezing pipe 4 is set on the side wall of the starting working well to freeze the outer circle stratum when the rubber bag and the curtain rubber plate fail to waterproof at the same time.

[0047] Figure 7-10 As another embodiment, Figure 7 This is a schematic diagram of the cross-section layout of a single pilot tube. Figure 8 This is a schematic diagram of the cross-sectional layout of grouped interlocking jacking pipes. The front of the single guide pipe 6 is connected to the single guide pipe 5. The single guide pipe 6 and the combined pipe body 7 connected to the single guide pipe together constitute an interlocking pipe group. There is a jacking machine cutter head 7-1 in front of the combined pipe body 7 connected to the single guide pipe. Figure 9 This is a plan view of the single pilot pipe starting jacking, and the pilot pipe waterproofing measures are the same as those in the previous embodiment. Figure 9 A single pilot tube temporary water-stopping device is shown, which includes a fourth cord rubber plate 5-3-1, a fifth rubber bag 5-3-2, and a third cylindrical starting ring frame 5-3-3.

[0048] like Figure 9-10 When the single pilot pipe 5 is pushed in, the fourth cloth rubber plate 5-3-1 is used to stop water. Before installing the combined pipe body ring frame, the fifth rubber bag 5-3-2 is pressurized and inflated to seal the water from the formation. Then the combined pipe body ring frame is installed. When the jacking machine cutter head 7-1 is pushed in to the position of the fifth rubber bag 5-3-2, the rubber bag is broken. After that, if the combined pipe body needs to be temporarily water-stopped, a corrugated rubber bag (rubber bag 8 of the bite pipe group) is used.

[0049] The present invention is suitable for interlocking pipe jacking. It proposes a temporary water-stopping method for the initial construction of interlocking pipe jacking, which can effectively solve the problem of temporary water-stopping during interlocking pipe jacking construction and effectively reduce construction risks. With the promotion and use of interlocking pipe jacking, the water-stopping method proposed by the present invention has broad development prospects.

[0050] The present invention proposes a temporary water-stopping method for initial construction of bite-type pipe jacking, and the specific technical solution is as follows:

[0051] A temporary water-stopping method for initial construction of bite-jointed pipe jacking consists of four parts: temporary water-stopping of a pilot pipe, temporary water-stopping of a combined pipe body, subsequent temporary water-stopping of the combined pipe body, and emergency water-stopping.

[0052] (1) Temporary water stopping method for pilot pipe construction

[0053] The first pilot pipe 1-1 and the second pilot pipe 1-2 are separate circular pipes that can be temporarily water-stopped using existing technologies such as flaps, rubber sheets, and rubber bags. The initial construction temporary water-stopping device includes a first pilot pipe temporary water-stopping device 1-3 and a second pilot pipe temporary water-stopping device 1-4. The first pilot pipe temporary water-stopping device 1-3 includes a first rubber sheet 1-3-1, a first rubber bag 1-3-2, and a first cylindrical initial ring frame 1-3-3 that secures the first rubber sheet and the first rubber bag. The second pilot pipe temporary water-stopping device 1-4 includes a second rubber sheet 1-4-1, a second rubber bag 1-4-2, and a second cylindrical initial ring frame 1-4-3 that secures the second rubber sheet and the second rubber bag.

[0054] The cylindrical starting ring frame is divided into a fixed part and a detachable part. When the pilot tube starts, the fixed part and the detachable part of the starting ring frame are both installed in place to form a complete circular tube starting ring frame.

[0055] When the pilot pipe is launched, the rubber sheet is lifted as the jacking pipe is advanced. The flap and rubber sheet are bent in the direction of the jacking pipe. Under the combined action of the flap's limiting effect and the muddy water pressure in the excavation gap, the overlapped portion of the rubber sheet and the jacking pipe structure is compressed against the jacking pipe structure, thereby acting as a water stop. The flap and rubber sheet are both fixed to the inner wall of the working pit, with the rubber sheet located between the flap and the inner wall of the working pit. As the jacking pipe is advanced, the flap and rubber sheet are lifted, and the flap and rubber sheet are bent together in the direction of the jacking pipe, overlapping the jacking pipe structure. This is prior art and will not be described in detail here.

[0056] The rubber bladder has no contact with the pilot tube when unpressurized. To stop water flow, the bladder is filled with a pressurized medium such as water or air, causing it to inflate and pressurize against the pilot tube structure. Adjusting the pressure within the bladder adjusts the water-stopping effect. The rubber bladder is secured within a steel trough. When unpressurized, it remains contained within the trough. When pressurized, it expands from the trough and presses against the outer wall of the pilot tube. The trough is secured to the cylindrical starting ring frame. This prior art will not be described further here.

[0057] (2) Temporary water stopping method for initial construction of combined pipe body

[0058] After the first and second pilot pipes 1-1 and 1-2 are pushed in, the combined pipe body 2 (combined interlocking pipe body) is constructed. The combined pipe body 2 includes the first guide pipe 2-1 and the second guide pipe 2-2 at both ends and the interlocking jacking box 2-3 in the middle. The positions of the first and second guide pipes 2-1 and 2-2 correspond to the positions of the first and second pilot pipes 1-1 and 1-2 constructed previously, and are connected to the first and second pilot pipes 1-1 and 1-2 in the longitudinal direction, which is the direction of jacking.

[0059] Before the combined pipe body 2 is launched, the detachable parts of the first cylindrical launching ring frame 1-3-3 and the second cylindrical launching ring frame 1-4-3 are removed, and the remaining first cylindrical launching ring frame 1-3-3, the second cylindrical launching ring frame 1-4-3 and the corresponding launching ring frame of the engaging top pipe box body 2-3 together form the combined pipe body launching ring frame 2-3-3.

[0060] A third rubber sheet 2-3-1 and a third rubber bladder 2-3-2 are fixed to the combined tube body launch ring frame 2-3-3. The rubber sheet corresponding to the first guide tube 2-1 and the second guide tube 2-2 is the remaining rubber sheet after the detachable portions of the first cylindrical launch ring frame 1-3-3 and the second cylindrical launch ring frame 1-4-3 are removed. The rubber sheet corresponding to the interlocking top tube box 2-3 must be customized in advance based on the structure of the interlocking top tube, such as the sharp angle and sudden changes, and installed before the combined tube body 2 is launched. It is connected to the rubber sheet remaining after the detachable portions of the first cylindrical launch ring frame 1-3-3 and the second cylindrical launch ring frame 1-4-3 are removed. During the removal of the ring frame and the connection of the cord rubber sheet, the circumferential integrity of the pilot tube's initial water-stopping device is compromised, necessitating the pressurization of the first rubber bladder 1-3-2 and the second rubber bladder 1-4-2 of the first pilot tube 1-1 and the second pilot tube 1-2 for temporary water-stopping. The abrupt changes in the snap-fit ​​jacking pipe, such as the location where the snap-fit ​​jacking pipe box 2-3 flexibly connects to one end of the wire conduit, are known in the art and will not be further described. The cord rubber sheet, which overlaps the snap-fit ​​jacking pipe box 2-3, is designed to be shaped like a tail wing that fits snugly around the sharp corners and abrupt changes in the snap-fit ​​jacking pipe box 2-3.

[0061] The third rubber bladder 2-3-2 needs to be customized in advance according to the structure of the occlusal top tube, such as the sharp angle and sudden change. Its position is located outside the third fabric rubber plate 2-3-1 and inside the first rubber bladder 1-3-2 and the second rubber bladder 1-4-2. When not pressurized, it has no contact with the combined tube body 2. When the third rubber bladder 2-3-2 is needed for water stopping, the third rubber bladder 2-3-2 is filled with water or air or other pressurized medium to pressurize the third rubber bladder 2-3-2 until it is pressed tightly against the top tube structure. The water stopping effect is adjusted by adjusting the pressure in the rubber bladder. The bladder wall of the third rubber bladder 2-3-2 corresponding to the structural position of the occlusal top tube, such as the sharp angle and sudden change, is designed to be wing-shaped so as to fit and connect with the sharp angle and sudden change structure of the occlusal top tube. That is, after the third rubber bladder 2-3-2 is expanded, it can completely fit and press against the outer wall of the occlusal top tube, and there will be no gaps at the sharp angle and sudden change structure of the outer wall of the occlusal top tube, thus ensuring a good water stopping effect. The third rubber bag 2-3-2 is fixed in the steel groove and is accommodated in the steel groove when not pressurized. After pressurization, it expands out of the steel groove and presses the outer wall of the combined tube body. The steel groove is fixed on the starting ring frame 2-3-3 of the combined tube body. This is the existing technology and will not be described here.

[0062] (3) Temporary water stopping method for subsequent combined pipe body construction

[0063] When the subsequent combined interlocking jacking pipe body is initially launched, the guide pipe on one side thereof needs to be advanced along the track of a previously constructed guide pipe. Here, the example of advancing the right guide pipe of the subsequent combined interlocking jacking pipe along the previously constructed first guide pipe 2-1 is used for explanation.

[0064] In this embodiment, the subsequent combined tube body refers to the combined tube body extending subsequently to the left side of the combined tube body 2, which is not shown in the figure.

[0065] The combination of the temporary water-stopping device for the subsequent combined pipe body initial construction is the same as the previous jacking pipe, including pre-buried ring frame, curtain rubber plate, airbag, etc.

[0066] Before the subsequent combined pipe body is launched, the pre-embedded ring frame is treated in the same manner as before the previous combined pipe body was launched. The removable ring frame at the overlapped position of the jacking pipe is removed, and the rubber sheeting for the subsequent combined pipe body is connected to the rubber sheeting of the previous jacking pipe remaining after the ring frame is removed. During this construction, since the circumferential integrity of the water-stopping device of the previous jacking pipe is damaged, it is necessary to pressurize the third rubber bladder 2-3-2 of the combined pipe body 2 to provide temporary water-stopping.

[0067] The subsequent combined pipe body will overlap with the previously constructed combined pipe body at the first guide pipe 2-1. During jacking, part of the original rubber bladder 2-3-2 at the first guide pipe 2-1 will be damaged. At this time, the rubber bladder 2-3-2 cannot be closed into a ring, posing a risk of water blocking. Therefore, a fourth rubber bladder 2-3-4 is pre-embedded along the longitudinal direction of the jacking pipe at the location where the first guide pipe 2-1 and the interlocking jacking pipe box 2-3 overlap, so that the rubber bladders of the combined pipe bodies originating from the front and back overlap. At the same time, the corresponding positions inside the rubber bladder 2-3-2 need to be partitioned and zoned in advance to achieve the effect of sealing the ring upward.

[0068] (4) Construction emergency water stopping method

[0069] The temporary water-stopping method for the initial construction of the bite-jacking pipe mainly relies on rubber bags and curtain rubber sheets for water-stopping. At the same time, in order to cope with emergencies, a reserved freezing pipeline 4 is set on the initial end wall (the end wall is the side wall of the working well) to freeze the outer circle stratum when the rubber bag and curtain rubber sheet fail to waterproof at the same time, so as to repair the waterproof structures such as the rubber bag and curtain rubber sheet.

[0070] With reference to the accompanying drawings, the present invention is achieved through the following technical means:

[0071] The present invention proposes a temporary water-stopping method for the initial construction of a bite-type jacking pipe, which includes four parts: a temporary water-stopping method for the initial construction of a pilot pipe, a temporary water-stopping method for the initial construction of a combined pipe body, a subsequent temporary water-stopping method for the initial construction of a combined pipe body, and a construction emergency water-stopping method. It mainly relies on rubber bags and curtain rubber plates to stop water, and pre-buries frozen pipes for emergency water-stopping.

[0072] When constructing the starting working pit of the interlocking jacking pipe, it is necessary to determine in advance the ring frame division, water-stop structure form, number of lines, front and rear position relationship, etc. according to the jacking pipe axis profile, combination method, construction sequence, etc., and pre-embed the fixed ring frame, detachable ring frame and each water-stop structure in the starting end wall according to the predetermined position.

[0073] During the construction of the interlocking jacking pipe, the pilot pipe is first pushed in; after the construction of the pilot pipe is completed, the rubber bag of the pilot pipe is pressurized, and then the detachable ring frame and the corresponding flap and curtain rubber plate at the position of the interlocking jacking pipe box are removed, and the curtain rubber plate corresponding to the interlocking jacking pipe box is connected, and then the interlocking jacking pipe box is pushed in.

[0074] After the occlusal jacking tube box is pushed in, the rubber bag of the box is pressurized, and then the detachable ring frame and the corresponding flap and cord rubber plate at the position of the subsequent occlusal jacking tube box are removed, and the cord rubber plate corresponding to the subsequent occlusal jacking tube box is connected, and then the subsequent occlusal jacking tube box is pushed in.

[0075] This cycle is repeated until all the interlocking jacking boxes are pushed in.

[0076] When the water-stop structure fails, the outer circle of the ground can be frozen through the freezing pipes pre-buried in the end wall to repair waterproof structures such as rubber bags and curtain rubber sheets.

[0077] The above description is only a description of the basic principles of the present invention, and does not limit the structure of the present invention to any specific shape, size, layout, excavation method, or material. Therefore, all corresponding modifications and equivalents that may be used are within the scope of the patent applied for by the present invention.

[0078] The present invention provides a temporary water-stopping method for initial construction of bite-joint jacking pipes. The water-stopping of the bite-joint jacking pipes consists of temporary water-stopping of a pilot pipe, temporary water-stopping of a combined pipe body and subsequent temporary water-stopping of the combined pipe body.

[0079] Temporary water-stopping method for the pilot pipe: two temporary water-stopping lines are set in the advancing direction, among which a rubber bag is set on the outer side of the end wall for filling water-stopping, and a flap and a curtain rubber plate are set on the inner ring frame of the end wall for water-stopping; during the jacking process of the pilot pipe, the temporary water-stopping adopts rubber bag + curtain rubber plate or only curtain rubber plate; during the construction process of removing the curtain rubber plate of the hole before the jacking of the combined pipe body and connecting it with the curtain rubber plate of the combined pipe body as a whole, rubber bags are used for temporary water-stopping around the pilot pipe.

[0080] Temporary water-stopping method for combined pipe body: Two temporary water-stopping lines are set on the combined pipe body along the excavation direction, among which a rubber bag filling water-stopping line is set in the front of the excavation direction, and a flap and a curtain rubber plate water-stopping line are set behind the excavation direction and on the inner side of the end wall; the rubber bag and the curtain rubber plate can be used at the same time during the excavation period, or only the curtain rubber plate can be used; when the curtain rubber plate at the tunnel entrance is extended, the rubber bag is used to fill the temporary water-stopping line; when the adjacent rubber bags at the connection of the two combined pipe bodies cannot form a loop, the rubber bags are set with longitudinal partitions at the connection guide pipe; the rubber bags of adjacent combined pipe bodies are staggered front and back, among which the rubber bag of the combined pipe body constructed first is arranged in the front of the excavation direction, and the rubber bag of the combined pipe body constructed later is arranged in the rear of the excavation direction.

[0081] Temporary water stopping of the bite-jacking pipe mainly relies on rubber bags and curtain rubber sheets to stop water. At the same time, a reserved freezing pipeline is set on the end wall to freeze the outer circle stratum when the rubber bags and curtain rubber sheets fail to waterproof at the same time, and repair the rubber bags, curtain rubber sheets and other waterproof structures.

[0082] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0083] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A temporary water-stopping method for initial construction of a bite-type pipe jacking, characterized by: Including temporary water stop from pilot pipe and temporary water stop from combined pipe body, The temporary water stop for the pilot pipe launch is made of a rubber sheet. A cylindrical launch ring frame is provided on the side wall of the launch working pit. The rubber sheet is fixed on the cylindrical launch ring frame. When the pilot pipe is launched, the rubber sheet is lifted up as the jacking pipe advances. The rubber sheet is bent in the direction of the jacking pipe. Under the action of the muddy water pressure in the excavation gap, the overlapped part of the rubber sheet and the jacking pipe structure is pressed tightly against the jacking pipe structure, thereby playing a water-stopping role. After the pilot pipe is pushed in, the combined pipe body is constructed. The combined pipe body includes a guide pipe and a bite-type jacking box. The guide pipe is connected to the pilot pipe one by one. Before the combined pipe body is launched, a part of the cylindrical launching ring frame and a part of the cord rubber sheet are removed, and the remaining cylindrical launching ring frame is combined with the starting ring frame of the corresponding bite top pipe box to form the combined pipe body starting ring frame, and the cord rubber sheet of the combined pipe body is installed to temporarily stop the water when the combined pipe body is launched; Before the subsequent construction of the combined pipe body, it is necessary to remove the ring frame of the constructed pipe body under water-free conditions, install the subsequent combined pipe body curtain rubber plate, and use the rubber bag installed around the constructed pipe body to apply pressure to temporarily block the external water; The shape of the rubber bag: the rubber bag of the pilot pipe is a ring around the pilot pipe steel pipe, the rubber bag of the separately enclosed combined pipe body is a closed wavy shape, and the rubber bag of the subsequent construction pipe body in the continuous combined pipe body is an open wavy rubber bag, and should overlap with the curtain rubber sheet or the constructed rubber bag.

2. The temporary water-stopping method for initial construction of a bite-type pipe jacking as claimed in claim 1, characterized in that: Arrangement of the rubber bag: the rubber bag of the later constructed pipe body is installed on the inner side of the rubber bag of the earlier constructed pipe body.

3. The temporary water-stopping method for initial construction of a bite-type pipe jacking as claimed in claim 1, characterized in that: The rubber bag is located within the cuttable range of the pipe jacking and is cut by the cutter disc during pipe jacking construction.

4. The temporary water-stopping method for initial construction of a bite-type pipe jacking as claimed in claim 1, characterized in that: When the combined pipe body continues to extend in the circumferential direction, when the subsequent combined pipe body starts, the guide pipe on one side thereof needs to be advanced along the trajectory of a previously constructed guide pipe. The temporary water-stopping method for the subsequent combined pipe body is the same as that for the previous combined pipe body, using a cord rubber plate and a rubber bag for water-stopping. Before the subsequent combined pipe body starts, a part of the starting ring frame of the previous combined pipe body and a part of the cord rubber plate of the previous combined pipe body are removed, and the remaining part of the starting ring frame of the previous combined pipe body is connected to the starting ring frame of the subsequent combined pipe body. The cord rubber plate corresponding to the subsequent combined pipe body is connected to the cord rubber plate remaining after removal for temporary water-stopping of the subsequent combined pipe body. During this construction, since the circumferential integrity of the starting water-stopping device of the previous combined pipe body is destroyed, the rubber bag of the previous combined pipe body needs to be pressurized and the rubber bag is used for temporary water-stopping.

5. The temporary water-stopping method for initial construction of a bite-type pipe jacking as claimed in claim 3, characterized in that: In the previous combined pipe body, a rubber bag extending longitudinally along the jacking pipe is pre-buried at the overlapping position of the guide pipe to be ejected and the bite jacking pipe box.

6. The temporary water-stopping method for initial construction of a bite-type pipe jacking as claimed in claim 4, characterized in that: In the face of an emergency water-stopping situation, a reserved freezing pipeline is set on the side wall of the starting working well to freeze the outer circle of the ground when the rubber bag and the curtain rubber plate fail to waterproof at the same time.

Images