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

Abstract

The present invention provides a temporary water-stopping method for construction of interlocking pipe jacking, comprising a pilot pipe receiving water-stopping method, a combined pipe body receiving water-stopping method, a continuous combined pipe body receiving water-stopping method, and a construction emergency water-stopping method. A first steel sleeve is installed on a ring frame of a working well end wall. After a pilot pipe jacking machine pushes the first steel sleeve into the first steel sleeve, a first rubber bag buried in the working well end wall is pressurized and filled, and then the first steel sleeve and the pilot pipe jacking machine are removed. When the combined pipe body is pushed forward, the pilot pipe is continuously pushed out from a receiving end until the combined pipe body reaches the receiving end. Before the combined pipe body reaches the receiving end, a third rubber bag wrapping the combined pipe body is installed, and the third rubber bag is fixed in the working well end wall. A second steel sleeve for receiving the combined pipe body jacking machine is installed on the working well end wall, and an opening for pushing out a guide pipe of the combined pipe body is opened at one end of the second steel sleeve away from the working well end wall. The third rubber bag is filled and expanded, and then the second steel sleeve and the combined pipe body jacking machine are removed.

Description

Technical Field

[0001] The invention belongs to the field of tunnel engineering and can be applied to bite pipe jacking construction, in particular to a temporary water stopping method for bite pipe jacking construction. 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 pipe jacking or shield machine handling, water and mud inrush are significant risks, and measures should be taken to mitigate these risks before the project begins. In situations where external water pressure is high, temporary waterstopping measures are often employed using a combination of rubber cord and pallets. In recent years, there have also been cases of employing retractable and inflatable airbags for waterstopping.

[0004] The bite pipe jacking is a new construction equipment proposed recently, which can be widely used in the construction of tunnels with the build-before-cut method. Figure 1 As shown, according to the requirements of the construction orientation of the interlocking jacking pipe and the connection of adjacent interlocking jacking pipes, a first pilot pipe 1-1 and a second pilot pipe 1-2 are set at both ends of the interlocking jacking pipe, and then the combined pipe body 2 is excavated. The first guide pipe 2-1 and the second guide pipe 2-2 at both ends of the combined pipe body are respectively connected to the first pilot pipe 1-1 and the second pilot pipe 1-2 that have been constructed. As the combined pipe body 2 is excavated, the first pilot pipe 1-1 and the second pilot pipe 1-2 are pushed out and replaced by the first guide pipe 2-1 and the second guide pipe 2-2 connected to the combined pipe body. According to the construction process characteristics of the interlocking jacking pipe, the interlocking jacking pipe receives the pilot pipes on both sides first. During the process of the combined pipe body being jacked, the pilot pipes are continuously received, and then the combined pipe body is received together. When the combined pipe body of the next cycle is jacked, the guide pipes with movable joints of the previous cycle are continuously received.

[0005] Therefore, compared with the existing ordinary jacking or shield construction, ordinary jacking or shield receiving only once, and the main receiving body is the jacking machine or shield machine, while the bite jacking pipe needs to be received multiple times and continuously, especially at the pilot pipe position, not only to receive the jacking machine, but also to receive the subsequent steel pipes, and the receiving state must be maintained until the last pipe section of the pipe position is pushed into place. Therefore, the receiving and water-stopping requirements of the bite jacking pipe are as follows:

[0006] 1. The arrival of the pilot pipe is different from the arrival of existing jacking pipes and shield tunnels. In existing jacking pipe or shield tunneling technologies, after the jacking machine or shield machine reaches the receiving well, the pipe body will remain at the opening. The gap between the pipe body and the excavation contour can then be sealed by grouting. After the arrival and reinforcement, the path for groundwater inflow can be blocked. However, after the pilot pipe arrives, it needs to be continuously pushed out from the receiving end during the construction of the combined pipe body.

[0007] 2. When the combined pipe body is advanced, the temporary water-stop device of the pilot pipe on the side of the combined pipe body needs to be removed, and a water-stop device that completely covers the pipe body needs to be installed;

[0008] 3. If the combined pipe body continues to extend, the next section of the combined pipe body 3 is pushed forward, and the guide pipe on one side of the previously constructed combined pipe body needs to be continuously pushed out. At this time, the pushed-out guide pipe has a C-shaped opening structure. Before the combined pipe body is pushed out, the temporary water stop of the C-shaped opening needs to be transformed into a water stop device that covers the entire combined pipe body. The two ends of the next section of the combined pipe body 3 are the third guide pipe 3-1 and the fourth guide pipe 3-2.

[0009] 4. The requirements for interlocking pipe jacking differ from existing shield tunneling technologies. During the jacking process, interlocking pipe jacking maintains slurry on the outside of the pipe to reduce friction. The waterstop for combined pipe jacking should remain effective until the combined pipe jacking is complete. To reduce construction risks, it is necessary to design a temporary waterstop method suitable for interlocking pipe jacking during arrival. 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 bite-jacking construction, which can better solve the problem of temporary water-stopping in bite-jacking 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 construction of bite-jack pipe, comprising a pilot pipe receiving water-stopping method and a combined pipe body receiving water-stopping method.

[0013] Pilot pipe receiving water stop:

[0014] S1. The pilot pipe passes through the end wall of the working well and enters the working well. The ring frame of the end wall of the working well is equipped with a first steel sleeve for receiving the pilot pipe jacking machine. The first steel sleeve is located in the working well.

[0015] After the pilot pipe jacking machine pushes the first steel sleeve into place, the first rubber bag buried in the end wall of the working well is pressurized and filled, so that the first rubber bag is pressed tightly on the pilot pipe behind the jacking machine, thereby cutting off the water from the formation;

[0016] S2. Then remove the first steel sleeve and the pilot pipe jacking machine, and install the first rubber sheet surrounding the pilot pipe in the hole of the working well end wall;

[0017] S3. When the combined tube body is pushed forward, the pilot tube is continuously pushed out from the receiving end until the combined tube body reaches the receiving end;

[0018] Combined pipe body receiving water stop:

[0019] S4. Before the combined pipe body reaches the receiving end, a third rubber bag is installed to wrap the combined pipe body. The third rubber bag is fixed in the end wall of the working well;

[0020] S5. A second steel sleeve for receiving the combined pipe jacking machine is installed on the side wall of the working pit end wall close to the working pit, and an opening for the guide pipe of the combined pipe body to be pushed out is opened at the end of the second steel sleeve away from the working pit end wall;

[0021] S6. The third rubber bag is filled and expanded to compress the combined pipe body and cut off the water from the formation. Then the second steel sleeve and the combined pipe body jacking machine are removed, and the third cord rubber plate surrounding the combined pipe body is installed at the hole in the end wall of the working well.

[0022] Furthermore, a rubber bag is provided on the pipe body in the direction of the water coming from the formation, and the rubber bag is pressurized and filled when the sleeve is removed, the cord rubber plate is installed, or when other needs arise, to block the water coming from the formation.

[0023] 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.

[0024] Furthermore, a longitudinal partition is set at the overlapping position of the open wavy rubber bag and the constructed rubber bag. The longitudinal partition is a rubber bag set within a certain range along the longitudinal direction of the top pipe, and together with the curtain rubber, the water-stop ring frame, etc., prevents groundwater from flowing.

[0025] 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.

[0026] 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.

[0027] Furthermore, in order to cope with emergencies, a reserved freezing pipeline is set on the end wall of the working well to freeze the outer circle stratum when the rubber bag and the curtain rubber plate fail to waterproof at the same time.

[0028] The present invention has the following beneficial effects:

[0029] 1. The present invention proposes a temporary water-stopping method for bite-jacking pipe receiving construction, which includes four parts: a pilot pipe receiving water-stopping method, a combined pipe body receiving water-stopping method, a combined pipe body receiving water-stopping method when the pipe bodies are continuously combined, 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.

[0030] 2. The temporary water-stopping method for receiving 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 water-stopping structure when receiving, thereby ensuring the water-stopping effect.

[0031] 3. The temporary water-stopping method for interlocking jacking pipe receiving construction proposed in the present invention can form a relatively sealed space for the jacking pipe, meeting the anti-seepage requirements of groundwater and muddy water jacking pipe construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] 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.

[0033] Figure 1 A schematic diagram of the interlocking jacking pipe provided in an embodiment of the present invention (the later-constructed jacking pipe is interlocked and overlapped with the earlier-constructed jacking pipe);

[0034] Figure 2 A schematic diagram of a pilot tube receiving device according to an embodiment of the present invention;

[0035] Figure 3 A schematic diagram of receiving a combined pipe body provided in an embodiment of the present invention;

[0036] Figure 4 A schematic diagram of receiving a combined pipe body during construction of a continuous combined pipe body according to an embodiment of the present invention;

[0037] Figure 5 The embodiment of the present invention provides Figure 4 A partial enlarged view of the .

[0038] Figure 6 A schematic diagram of the cross-sectional arrangement of a single pilot conduit provided in an embodiment of the present invention;

[0039] Figure 7 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);

[0040] Figure 8A plan view of a single-pipeline receiving and jacking process according to an embodiment of the present invention (arrows represent the direction of jacking);

[0041] Figure 9 A plan view of the grouped interlocking jacking pipe receiving and jacking process provided in an embodiment of the present invention (the arrow represents the jacking pipe advancement direction).

[0042] In the figure: first pilot tube 1-1, second pilot tube 1-2, first pilot tube water-stop device 1-3, first rubber sheet 1-3-1, first rubber bladder 1-3-2, second pilot tube water-stop device 1-4, second rubber sheet 1-4-1, second rubber bladder 1-4-2, first steel sleeve 1-5, combined tube body 2, first guide tube 2-1, second guide tube 2-2, combined tube body water-stop device 2-3, third rubber sheet 2-3-1, third rubber Bag 2-3-2, fourth rubber bag 2-3-3, second steel sleeve 2-4, 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, jacking machine cutter head 7-1, rubber bag 8 of bite pipe group, fourth cord rubber plate 5-3-1, fifth rubber bag 5-3-2, cylindrical receiving ring frame 5-3-3, fifth cord rubber plate 7-3-1. DETAILED DESCRIPTION

[0043] 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.

[0044] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0045] The terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the quantity of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features.

[0046] like Figure 1-Figure 5The embodiment of the present invention provides a temporary water-stopping method for construction of a bite-jack pipe, including a pilot pipe receiving water-stopping method and a combined pipe body receiving water-stopping method.

[0047] Pilot pipe receiving water-stopping: S1. The pilot pipe passes through the end wall of the working well and enters the working well. A first steel sleeve for receiving the pilot pipe jacking machine is installed on the steel ring frame of the end wall of the working well. The end of the first steel sleeve away from the end wall of the working well is a closed structure. The first steel sleeve is located in the working well. After the pilot pipe jacking machine is pushed into the first steel sleeve, the first rubber bag buried in the end wall of the working well is pressurized and filled, so that the first rubber bag is pressed tightly on the pilot pipe behind the jacking machine, thereby cutting off the formation water; S2. Then remove the first steel sleeve and the pilot pipe jacking machine, and the working well is completed. A first rubber sheet surrounding the pilot pipe is installed at the opening in the well end wall. The first rubber sheet is located on the sidewall of the working well end wall facing inward. S3: As the combined pipe body is advanced, the pilot pipe is continuously pushed out from the receiving end until the combined pipe body reaches the receiving end. This process utilizes only the first rubber sheet for water stopping, or utilizes a combination of the first rubber sheet and the first rubber bladder for dual water stopping. In this embodiment, the pilot pipe includes a first pilot pipe 1-1 and a second pilot pipe 1-2, and the first and second pilot pipes 1-1 and 1-2 have the same water stopping measures at the receiving end. The first pilot pipe 1-1 corresponds to a first pilot pipe water stopping device 1-3, which includes a first rubber sheet 1-3-1 and a first rubber bladder 1-3-2.

[0048] The second pilot pipe 1-2 corresponds to the second pilot pipe water-stopping device 1-4, and the second pilot pipe water-stopping device 1-4 includes a second cord rubber plate 1-4-1 and a second rubber bag 1-4-2.

[0049] Combined pipe body receiving water stop: S4. Before the combined pipe body reaches the receiving end, remove part of the steel ring frame at the overlap position of the corresponding guide pipe and the occlusal jacking pipe body, install the third rubber bag 2-3-2 that wraps the combined pipe body, and fix the third rubber bag 2-3-2 in the groove reserved in the end wall of the working pit. The third rubber bag 2-3-2 is located at the end of the working pit wall away from the working pit; the combined pipe body includes the guide pipes at both ends and the occlusal jacking pipe body between the two guide pipes;

[0050] S5. A second steel sleeve for receiving the combined pipe jacking machine is installed on the side wall of the working pit end wall near the working pit. An opening for the guide pipe of the combined pipe body to be pushed out is formed on the end of the second steel sleeve away from the working pit end wall. The opening for the guide pipe to be extended from the second steel sleeve is sealed with the outer wall of the guide pipe.

[0051] S6. The third rubber bag 2-3-2 is filled and expanded to compress the combined pipe body and cut off the water from the formation. Then the second steel sleeve and the combined pipe body jacking machine are removed. The third rubber sheet 2-3-1 surrounding the combined pipe body is installed in the hole of the end wall of the working well. The third rubber sheet is set on the side wall of the end wall of the working well facing the well.

[0052] The combined pipe body extends circumferentially to form a continuous combined pipe body. The continuous combined pipe body's receiving watertightness measures are the same as those of the combined pipe body, using rubber bladders and a rubber cord sheet. However, a fourth rubber bladder 2-3-3 extending longitudinally is installed at the disconnection point of the third rubber bladder 2-3-2 in the previous combined pipe body to prevent water seepage at the disconnection point. The rubber bladders of adjacent combined pipe bodies are staggered front and back in the receiving direction.

[0053] Construction emergency water-stopping method: In order to deal with emergencies, a reserved freezing pipe 4 is set on the end wall of the working well to freeze the outer circle stratum when the rubber bag and the curtain rubber plate fail to waterproof at the same time.

[0054] A rubber bladder is installed near the pipe body, in the direction of the groundwater inflow. The bladder is pressurized and filled when the sleeve is removed, the rubber sheet is installed, or when necessary to block the groundwater inflow. The rubber bladder shape: The rubber bladder of the pilot pipe is a circular ring surrounding the pilot pipe steel tube. The individually enclosed rubber bladder of the combined pipe body is a closed wavy shape. The rubber bladder of the subsequent pipe body in the continuous combined pipe body is an open wavy rubber bladder, which should overlap with the rubber sheet or the existing rubber bladder. A longitudinal partition is installed where the open wavy rubber bladder overlaps with the existing rubber bladder. This longitudinal partition is a rubber bladder (the fourth rubber bladder 2-3-3) installed within a certain range along the longitudinal direction of the jacking pipe. Together with the rubber bladder and the waterstop ring frame, it prevents groundwater from flowing through. Rubber bladder arrangement: The rubber bladder of the subsequent pipe body is installed inside the rubber bladder of the previous pipe body (inside and outside are distinguished by the orientation relative to the working shaft: the inner side is closer to the open surface of the working shaft, and the outer side is closer to the soil outside the working shaft).

[0055] Figure 6-Figure 9 As another embodiment, Figure 6 This is a schematic diagram of the cross-section layout of a single pilot tube. Figure 7 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 8 This is a plan view of a single pilot pipe receiving jacking, and the pilot pipe waterproofing measures are the same as those in the previous embodiment. Figure 8 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 cylindrical receiving ring frame 5-3-3.

[0056] like Figure 8-Figure 9When receiving the single pilot pipe 5, the fourth rubber sheet 5-3-1 is used to stop water. Before installing the combined pipe body ring frame and receiving steel sleeve, the fifth rubber bladder 5-3-2 is pressurized and inflated to seal off the stratum water. The combined pipe body ring frame, receiving sleeve, and other devices are then installed. When the pipe jacking machine cutterhead 7-1 reaches the position of the fifth rubber bladder 5-3-2, the rubber bladder is broken. The combined pipe body pipe jacking machine is then received. Before the pipe jacking machine is completely pushed out of the receiving well and removed along with the subsequent steel pipes, the rubber bladder 8 of the interlocking pipe group is pressurized to seal off the stratum water. The combined pipe jacking machine and receiving steel sleeve are then removed, and the tunnel entrance is sealed. The fifth rubber sheet 7-3-1 surrounding the interlocking pipe group is installed at the opening of the working well end wall. The fifth rubber sheet is located on the side wall of the working well end wall facing the well.

[0057] The present invention is suitable for interlocking pipe jacking. It proposes a temporary water-stopping method for interlocking pipe jacking construction, 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.

[0058] The present invention proposes a temporary water-stopping method for bite-jacking pipe receiving construction. The specific technical scheme is divided into the following: receiving water-stopping of the pilot pipe, receiving water-stopping of the combined pipe body, and receiving water-stopping during continuous construction of the combined pipe body.

[0059] (1) Pilot pipe receiving water stop

[0060] 1. The first pilot pipe 1-1 passes through the end wall (side wall of the working pit) and enters the working pit. Considering the gap between the excavation contour of the jacking pipe and the pipe body, the first steel sleeve 1-5 corresponding to the length of the pilot pipe jacking machine and the excavation diameter is installed on the steel ring frame of the working pit end wall. The front end of the first steel sleeve 1-5 is closed to form a closed space from the excavation surface of the end wall to the sleeve;

[0061] 2. The pilot pipe jacking machine pushes the first steel sleeve 1-5, and then pressurizes and fills the first rubber bag 1-3-2 buried in the end wall, so that the first rubber bag 1-3-1 is pressed tightly on the pilot pipe behind the jacking machine, thereby cutting off the stratum water;

[0062] 3. Then remove the first steel sleeve 1-5 and the pipe jacking machine, and install the first rubber sheet 1-3-2 surrounding the pilot pipe and the clamping plate to prevent the rubber sheet from turning out at the hole;

[0063] 4. When the combined pipe body is pushed forward, the first pilot pipe 1-1 and the second pilot pipe 1-2 are continuously pushed out from the receiving end. During the process, only the first rubber sheet 1-3-2 can be used for water stopping, or both the first rubber sheet 1-3-2 and the first rubber bag 1-3-1 can be used for water stopping;

[0064] 5. The pilot tube is continuously pushed out until the combined tube body reaches the receiving end.

[0065] (2) Combined pipe body receiving water stop

[0066] 1. Before the combined pipe body reaches the receiving end, remove the ring frame at the intersection of the guide pipe and install the third rubber bag 2-3-2 that wraps the combined pipe body; the combined pipe body water stop device 2-3 includes the third cord rubber plate 2-3-1 and the third rubber bag 2-3-2;

[0067] 2. Install the second steel sleeve 2-4 for receiving the combined pipe body in the end wall. The second steel sleeve 2-4 should envelop the entire range of the combined pipe body 2, wherein the first guide tube 2-1 and the second guide tube 2-2 corresponding to the combined pipe body 2 should be normally ejected. A seal is set at the front end of the second steel sleeve 2-4 between the steel sleeve and the first guide tube 2-1 and the second guide tube 2-2, ultimately forming a completely enclosed cylinder space.

[0068] 3. Fill the third rubber bag 2-3-2, cut off the ground water, then remove the second steel sleeve 2-4 and the pipe jacking machine, install the third rubber sheet 2-3-1 and the clamping plate for limiting the third rubber sheet;

[0069] (3) Combined pipe body receiving water stop when continuously combining pipe bodies

[0070] The receiving of the combined tube bodies when the tube bodies are continuously combined is the same as the steps of combining the tube bodies in the above (II), the difference lies in the setting range of the third rubber bag 2-3-2 and the receiving of the guide tube 2-1.

[0071] 1. Because one end of the continuous combined pipe body is connected to another combined pipe body, the third rubber bag 2-3-2 cannot be closed and needs to be disconnected at the pipe body. However, a closed waterproof partition needs to be set, and a longitudinal partition is set at the connection of the combined pipe body (the fourth rubber bag 2-3-3 is set in the longitudinal direction, and the longitudinal direction is the receiving direction).

[0072] 2. The first guide pipe 2-1 has been waterproofed with two layers of rubber bag and rubber curtain sheet during the construction of the previous section of the combined pipe body. The C-shaped pipe is pushed out from the stratum and no additional waterproofing measures are required.

[0073] (4) Construction emergency water stopping method

[0074] The temporary water-stopping method when the bite-jacking pipe reaches the receiving end mainly relies on rubber bags and curtain rubber sheets to stop water. At the same time, in order to cope with emergencies, a reserved freezing pipeline is set on the arrival end wall 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.

[0075] With reference to the accompanying drawings, the present invention is achieved through the following technical means:

[0076] The present invention proposes a temporary water-stopping method for bite-jacking pipe receiving construction, which includes four parts: a pilot pipe receiving water-stopping method, a combined pipe body receiving water-stopping method, a combined pipe body receiving water-stopping method when the pipe bodies are continuously combined, and a construction emergency water-stopping method. It mainly relies on rubber bags and cord rubber plates for water-stopping, and pre-buries frozen pipes for emergency water-stopping.

[0077] When constructing the interlocking jacking pipe receiving working pit, it is necessary to determine the ring frame division, water-stop structure form, number of lines, front and rear position relationship, etc. in advance 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 receiving end wall according to the predetermined position.

[0078] During the interlocking pipe jacking construction, the pilot pipe is jacked in first; the pilot pipe is received by a steel sleeve, and a steel sleeve corresponding to the length of the pilot pipe jacking machine and the excavation diameter is installed on the steel ring frame of the end wall of the working well. The front end of the steel sleeve is closed to form a closed space from the excavation surface of the end wall to the sleeve.

[0079] After the pilot pipe jacking machine pushes the sleeve into the casing, the rubber bag buried in the end wall is pressurized and filled so that the rubber bag is pressed tightly on the pilot pipe behind the jacking machine, thereby cutting off the water from the formation; then the sleeve and the jacking machine are removed, and a rubber curtain sheet surrounding the pilot pipe and a card to prevent the rubber curtain sheet from turning out are installed at the hole.

[0080] Before the combined pipe body reaches the receiving end, the rubber bladder corresponding to the pilot pipe is pressurized and inflated. The receiving ring frame and corresponding water-stopping devices such as the rubber sheet and clamping plate at the overlap of the combined pipe body and the pilot pipe are removed. A sleeve and rubber bladder that can envelop the pilot pipe and combined pipe body are installed. The remaining pilot pipe is received together with the pipe jacking machine of the combined pipe body. The rubber bladder of the combined pipe body is then pressurized to cut off the water supply from the formation. The pipe jacking machine and sleeve are removed, and the rubber sheet surrounding the combined pipe body and the clamping plate to prevent the rubber sheet from falling out are installed to receive the remaining combined pipe body. The receiving process can use only the rubber sheet waterstop, or a dual waterstop of the rubber sheet and rubber bladder can be used.

[0081] After the bite-jointed jacking tube box (bite-jointed jacking tube body) 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 bite-jointed jacking tube box are removed, and the cord rubber plate corresponding to the subsequent bite-jointed jacking tube box is connected, and then the subsequent bite-jointed jacking tube box is pushed in.

[0082] This cycle is repeated until all the interlocking jacking boxes are pushed in.

[0083] 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.

[0084] 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.

[0085] The present invention proposes a temporary water-stopping method for bite-jointed jacking pipe receiving construction, wherein the water-stopping of the bite-jointed jacking pipe comprises temporary water-stopping of a pilot pipe receiving construction, temporary water-stopping of a combined pipe body receiving construction, temporary water-stopping of a subsequent combined pipe body receiving construction and emergency water-stopping.

[0086] Temporary water-stopping method for receiving the pilot pipe: a steel sleeve is set at the opening and a rubber bag is set on the outer side of the end wall; when receiving, the jacking pipe is pushed into the steel sleeve, and then the rubber bag is filled to cut off the groundwater source, and then the steel sleeve is removed and the jacking pipe is disintegrated; a curtain rubber plate and a steel clamping plate are installed at the opening to meet the reception requirements of the subsequent combined pipe body pilot pipe that is continuously pushed out; when the combined pipe body is pushed forward, the temporary water-stopping during the pilot pipe ejection process uses a rubber bag + curtain rubber plate or only a curtain rubber plate; before the combined pipe body is pushed in, the curtain rubber plate at the opening is removed and connected to the curtain rubber plate of the combined pipe body as a whole during the construction process, and the rubber bag is used for temporary water-stopping around the pilot pipe.

[0087] Temporary water-stopping method for combined pipe body: a steel sleeve is installed in the end wall, a rubber bag is installed in the end wall, and a curtain rubber plate and a steel clamping plate are installed after the pipe jacking machine is removed; the pipe jacking machine pushes the rubber bag into the steel casing to fill it and cut off the path for groundwater to flow in; after the pipe jacking machine is removed, a curtain rubber plate + rubber bag or a curtain rubber plate is used for water-stopping; the rubber bag covers the range of the pipe body pushed in one time, and the rubber bag is provided with a longitudinal partition 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 front of the excavation direction, and the rubber bag of the combined pipe body constructed later is arranged at the rear of the excavation direction.

[0088] The temporary water-stopping of the bite-jacking pipe mainly relies on rubber bags and curtain rubber sheets. At the same time, a reserved freezing pipe is set on the end wall to freeze the outer circle stratum when the rubber bag and curtain rubber sheet fail to waterproof at the same time, and repair the rubber bag, curtain rubber sheet and other waterproof structures.

[0089] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0090] 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 bite-jointed pipe jacking construction, characterized by: Including pilot pipe receiving water stop and combined pipe body receiving water stop, Pilot pipe receiving water stop: S1. The pilot pipe passes through the end wall of the working well and enters the working well. The ring frame of the end wall of the working well is equipped with a first steel sleeve for receiving the pilot pipe jacking machine. The first steel sleeve is located in the working well. After the pilot pipe jacking machine pushes the first steel sleeve into place, the first rubber bag buried in the end wall of the working well is pressurized and filled, so that the first rubber bag is pressed tightly on the pilot pipe behind the jacking machine, thereby cutting off the water from the formation; S2. Then remove the first steel sleeve and the pilot pipe jacking machine, and install the first rubber sheet surrounding the pilot pipe in the hole of the working well end wall; S3. When the combined tube body is pushed forward, the pilot tube is continuously pushed out from the receiving end until the combined tube body reaches the receiving end; Combined pipe body receiving water stop: S4. Before the combined pipe body reaches the receiving end, a third rubber bag is installed to wrap the combined pipe body. The third rubber bag is fixed in the end wall of the working well; S5. A second steel sleeve for receiving the combined pipe jacking machine is installed on the side wall of the working pit end wall close to the working pit, and an opening for the guide pipe of the combined pipe body to be pushed out is opened at the end of the second steel sleeve away from the working pit end wall; S6. The third rubber bladder is filled and expanded to compress the combined pipe body, cutting off the stratum water. The second steel sleeve and the combined pipe jacking machine are then removed, and a third rubber sheet surrounding the combined pipe body is installed at the opening of the end wall of the working well. Among them, a rubber bag is set in the direction of the water coming from the formation on the pipe body. When removing the sleeve, installing the rubber sheet or other times when needed, the rubber bag is pressurized and filled to block the water coming from the formation. 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 occlusal pipe jacking construction according to claim 1, characterized in that: A longitudinal partition is set at the overlapping place between the open wavy rubber bag and the constructed rubber bag. The longitudinal partition is a rubber bag set within a certain range along the longitudinal direction of the top pipe, and together with the curtain rubber and the water-stop ring frame, it prevents groundwater from flowing.

3. The temporary water-stopping method for occlusal pipe jacking construction according to 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.

4. The temporary water-stopping method for occlusal pipe jacking construction according to 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.

5. The temporary water-stopping method for bite-jointed pipe jacking construction according to claim 1, characterized in that: In order to cope with emergencies, a reserved freezing pipeline is set on the end wall of the working well to freeze the outer circle of the ground when the rubber bag and the curtain rubber sheet fail to waterproof at the same time.

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