CN115749867B - A temporary water-stopping method for bite-jacking construction - Google Patents
A temporary water-stopping method for bite-jacking constructionInfo
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- CN115749867B CN115749867B CN202211435796.4A CN202211435796A CN115749867B CN 115749867 B CN115749867 B CN 115749867B CN 202211435796 A CN202211435796 A CN 202211435796A CN 115749867 B CN115749867 B CN 115749867B
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Abstract
The invention provides a temporary water stopping method for a meshed pipe jacking arrival construction, which comprises the steps of receiving water stopping by a pilot pipe, receiving water stopping by a combined pipe, continuously receiving water stopping by the combined pipe, and constructing an emergency water stopping method, wherein a first steel sleeve is arranged on a ring frame of an end wall of a working well, after the pilot pipe jacking machine is jacked into the first steel sleeve, pressurizing and filling a first rubber bag buried in the end wall of the working well, then dismantling the first steel sleeve and the pilot pipe jacking machine, when the combined pipe is pushed, continuously ejecting a guide pipe from a receiving end until the combined pipe reaches the receiving end, installing a third rubber bag wrapping the combined pipe before the combined pipe reaches the receiving end, fixing the third rubber bag in the end wall of the working well, installing a second steel sleeve for receiving the combined pipe jacking machine on the end wall of the working well, opening for jacking a guide pipe of the combined pipe is formed in one end, and then dismantling the second steel sleeve and the combined pipe jacking machine.
Description
Technical Field
The invention belongs to the field of tunnel engineering, and relates to a temporary water stopping method for occlusion pipe-jacking arrival construction, which can be applied to occlusion pipe-jacking arrival construction.
Background
With the continuous promotion of urban construction in China, large-span shallow-buried tunnels are increasingly increased, wherein more and more cases of building structures such as railways, roads, subway stations and the like are penetrated downwards, and the requirements on tunnel construction settlement control are higher and higher. Therefore, the underground excavation tunnel construction method adopting the annular pre-excavation advanced support circulation is provided, a plurality of push bench excavation travel tunnel pre-support structures which are arranged along the tunnel annular direction are adopted, and the excavation outlines of the adjacent push bench cutterheads are overlapped and meshed.
In the receiving construction of a pipe jacking or shield tunneling machine, water and mud gushing during receiving are important risk events of construction, and measures are taken to reduce the risk of construction before engineering is implemented. In the case of a relatively large external water pressure, temporary water stop is performed by using a curtain rubber and a clamp plate for receiving construction, and in recent years, there is a case of receiving water stop by using a collapsible and inflatable airbag.
The occlusion jacking pipe is a recently newly proposed construction device and can be widely applied to the construction of a tunnel by a first construction and then excavation method. As shown in figure 1, according to the requirements of construction orientation of the occlusion jacking pipe, connection of adjacent occlusion jacking pipes and the like, a first guide pipe 1-1 and a second guide pipe 1-2 are arranged at two ends of the occlusion jacking pipe, then a combined pipe body 2 is tunneled, wherein the first guide pipe 2-1 and the second guide pipe 2-2 at two ends of the combined pipe body are respectively connected with the constructed first guide pipe 1-1 and the constructed second guide pipe 1-2, the first guide pipe 1-1 and the constructed second guide pipe 1-2 are pushed out along with the tunnelling of the combined pipe body 2, and the first guide pipe 1-1 and the second guide pipe 1-2 are replaced by the first guide pipe 2-1 and the second guide pipe 2-2 connected with the combined pipe body. According to the construction process characteristics of the occlusion jacking pipe, the receiving time sequence of the occlusion jacking pipe is to firstly receive the pilot pipes on two sides, the pilot pipes are continuously received in the jacking process of the combined pipe body, then the combined pipe bodies are received together, and when the combined pipe body of the next cycle is jacked, the guide pipe with the movable joint of the previous cycle is continuously received.
Therefore, compared with the existing common pipe jacking or shield engineering construction, the common pipe jacking or shield receiving is only received once, the main body of the receiving is a pipe jacking machine or a shield machine, the occluded pipe jacking is required to be received continuously for a plurality of times, particularly, the pipe position of the previous conduit is required to be received, the pipe jacking machine is required to be received, the subsequent steel pipes are required to be received, and the receiving state is required to be kept until the pipe section of the last cycle of the pipe position is jacked in place. Therefore, the water stop receiving requirements of the occlusion jacking pipe are as follows:
1. the arrival of the pilot pipe is different from the arrival of the existing pipe jacking and shield. After the pipe jacking machine or the shield tunneling machine of the prior art reaches a receiving well, a pipe body can be left at a hole, then a gap between the pipe body and an excavation outline can be closed through grouting, and a path in which groundwater is poured can be plugged after the pipe body and the excavation outline are matched to be reinforced;
2. the combined pipe body is pushed, the temporary water stopping device of the pilot pipe at the front stage is required to be removed by leaning against the side of the combined pipe body, and the water stopping device which completely covers the pipe body is installed;
3. If the combined pipe body continues to extend subsequently, the combined pipe body 3 of the next section is pushed forward, one side guide pipe of the combined pipe body of the previous construction needs to be continuously pushed out, and the pushed out guide pipe is of a C-shaped opening structure;
4. The occlusion jacking pipe reaches the shield receiving requirement different from the prior art, and the slurry outside the pipe body is continuously kept by the occlusion jacking pipe in the jacking process so as to reduce the jacking friction force. The combined jacking pipe reaching water stop should remain effective until the combined jacking pipe is completed. In order to reduce the risk in construction, it is necessary to design a temporary water stopping method suitable for the construction of the occluded jacking pipe.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a temporary water stopping method for the construction of the occluded jacking pipe, can better solve the problem of temporary water stopping for the construction of the occluded jacking pipe, and effectively reduces the construction risk.
The invention is realized in the following way:
the invention provides a temporary water stopping method for a meshed jacking pipe arrival construction, which comprises a pilot pipe receiving water stopping and a combined pipe body receiving water stopping,
The pilot pipe receives water:
s1, leading pipes penetrate through the end wall of the working well to enter the working well, a first steel sleeve for receiving the leading pipe push bench is arranged on a ring frame of the end wall of the working well, the first steel sleeve is positioned in the working well,
After the first steel sleeve is jacked into the pipe jacking machine, pressurizing and filling a first rubber bag buried in the end wall of the working well, so that the first rubber bag is tightly pressed on the first pipe behind the pipe jacking machine, and stratum water is cut off;
s2, removing the first steel sleeve and the pilot pipe jacking machine, and installing a first curtain cloth rubber plate surrounding the pilot pipe at the opening of the end wall of the working well;
S3, when the combined pipe body is pushed in, the guide pipe is continuously ejected from the receiving end until the combined pipe body reaches the receiving end;
The combined pipe body receives water stop:
S4, 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 end wall of the working well;
S5, a second steel sleeve for receiving the combined pipe jacking machine is arranged on the side wall, close to the inside of the working well, of the working well end wall, and an opening for ejection of a guide pipe of the combined pipe body is formed in one end, far away from the working well end wall, of the second steel sleeve;
s6, filling and expanding the third rubber bag, compressing the combined pipe body, cutting off stratum water, removing the second steel sleeve and the combined pipe body push bench, and installing a third curtain cloth rubber plate surrounding the combined pipe body at the hole opening of the end wall of the working well.
Further, rubber bags are arranged in the direction of the pipe body, which is close to the stratum water, and the rubber bags are pressurized and filled to seal the stratum water when the sleeve is removed, the curtain cloth rubber plate is installed and other requirements are met.
Further, the rubber capsule of the first conduit is a circular ring wound around the steel pipe of the first conduit, the rubber capsule of the combined conduit is in a closed wave shape, the rubber capsule of the post-construction conduit in the continuously combined conduit is in an open wave-shaped rubber capsule and is in lap joint with the cord fabric rubber plate or the constructed rubber capsule.
Further, a longitudinal partition is arranged at the overlapping position of the wavy rubber bag and the constructed rubber bag, the longitudinal partition is the rubber bag which is arranged in a certain range along the longitudinal direction of the jacking pipe, and the rubber bag, the curtain cloth rubber, the water stop ring frame and the like are used for preventing underground water from flowing.
Further, the rubber bag is arranged in a mode that the rubber bag of the later construction pipe body is arranged on the inner side of the rubber bag of the earlier construction pipe body.
Further, the rubber bag is positioned in a range where the jacking pipe can be cut, and is cut by the cutter head during the construction of the jacking pipe.
Further, in order to cope with emergency, a reserved freezing pipeline is arranged on the end wall of the working well and used for freezing the outer ring stratum when the rubber bag and the curtain cloth rubber plate are simultaneously waterproof and invalid.
The invention has the following beneficial effects:
1. the temporary water stopping method for the occlusion jacking pipe receiving construction comprises four parts, namely a pilot pipe water stopping method, a combined pipe water stopping method during continuous combined pipe body, and an emergency water stopping method for construction, wherein water stopping is mainly carried out by means of rubber capsules and curtain cloth rubber plates, and freezing pipelines are pre-buried for emergency water stopping.
2. According to the temporary water stopping method for the receiving construction of the meshed jacking pipe, the structural characteristics and the construction sequence of the combined meshed jacking pipe are combined, and the water stopping structures of a plurality of combinations staggered front and back are arranged, so that all parts of the combined meshed jacking pipe are provided with the closed ring-shaped arrival water stopping structure when being received, and the water stopping effect is ensured.
3. The temporary water stopping method for the occlusion pipe-jacking receiving construction can form a relatively sealed space of the pipe-jacking, and meets the seepage-proofing requirements of slurry of underground water and muddy water pipe-jacking in pipe-jacking construction.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of an engaging pipe jacking (engaging and overlapping a post-construction pipe jacking with a pre-construction pipe jacking) according to an embodiment of the present invention;
FIG. 2 is a schematic illustration of a pilot pipe receiver according to an embodiment of the present invention;
FIG. 3 is a schematic view of a receiving unit of a combined pipe according to an embodiment of the present invention;
FIG. 4 is a schematic view of receiving a combined pipe body during construction of a continuous combined pipe body according to an embodiment of the present invention;
fig. 5 is an enlarged view of a portion of fig. 4 provided in an embodiment of the present invention.
FIG. 6 is a schematic diagram of a cross-sectional layout of a single pilot tube according to an embodiment of the present invention;
fig. 7 is a schematic diagram of a cross-sectional arrangement of a grouped snap-in jacking pipe (taking three steel pipes as an example) according to an embodiment of the present invention;
FIG. 8 is a top plan view of a single-pilot pipe receiver (arrows represent push pipe advancing directions) according to an embodiment of the present invention;
fig. 9 is a plan view of a group engaging push pipe receiving jack provided by an embodiment of the present invention (arrows represent push pipe advancing directions).
In the figure, a first pilot pipe 1-1, a second pilot pipe 1-2, a first pilot pipe water stop device 1-3, a first curtain rubber plate 1-3-1, a first rubber capsule 1-3-2, a second pilot pipe water stop device 1-4, a second curtain rubber plate 1-4-1, a second rubber capsule 1-4-2, a first steel sleeve 1-5, a combined pipe body 2, a first guide pipe 2-1, a second guide pipe 2-2, a combined pipe body water stop device 2-3, a third curtain rubber plate 2-3-1, a third rubber capsule 2-3-2, a fourth rubber capsule 2-3-3, a second steel sleeve 2-4, a combined pipe body 3 of the next section, a third guide pipe 3-1, a fourth guide pipe 3-2, a reserved freezing pipeline 4, a single pilot pipe 5, a single guide pipe 6, a combined pipe body 7 connected with the single guide pipe, a pipe cutter disc 7-1 of a pipe pusher, a meshed pipe set 8, a fourth rubber plate 5-3-1, a fifth rubber capsule 2-3-3, a fifth rubber capsule 5-3-3, and a fifth rubber capsule 7-3-3.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature.
As shown in fig. 1 to 5, the embodiment of the invention provides a temporary water stopping method for a bite pipe-jacking arrival construction, which comprises a pilot pipe receiving water and a combined pipe body receiving water stopping,
S1, a pilot pipe passes through a working well end wall to enter a working well, a first steel sleeve for receiving a pilot pipe push bench is arranged on a steel ring frame of the working well end wall, one end of the first steel sleeve, which is far away from the working well end wall, is of a closed structure, the first steel sleeve is positioned in the working well, and after the pilot pipe push bench is pushed into the first steel sleeve, a first rubber bag buried in the working well end wall is pressurized and filled, so that the first rubber bag is tightly pressed on a pilot pipe behind the push bench, and stratum water is cut off; S3, continuously ejecting the first guide pipe from the receiving end until the combined pipe reaches the receiving end when the combined pipe is pushed in, and stopping water by only adopting the first guide rubber plate or combining the first guide rubber plate with the first rubber bag or stopping water by adopting a double way, wherein in the embodiment, the guide pipe comprises a first guide pipe 1-1 and a second guide pipe 1-2, and the first guide pipe 1-1 and the second guide pipe 1-2 receive the same water stopping measures. The first pilot pipe 1-1 corresponds to a first pilot pipe water stop device 1-3, and the first pilot pipe water stop device 1-3 comprises a first cord fabric rubber plate 1-3-1 and a first rubber capsule 1-3-2.
The second pilot pipe 1-2 corresponds to the second pilot pipe water stop device 1-4, and the second pilot pipe water stop device 1-4 comprises a second cord fabric rubber plate 1-4-1 and a second rubber capsule 1-4-2.
S4, removing part of the steel ring frame corresponding to the lap joint position of the guide pipe and the occluded jacking pipe body before the combined pipe body reaches the receiving end, and installing a third rubber capsule 2-3-2 for wrapping the combined pipe body, wherein the third rubber capsule 2-3-2 is fixed in a reserved channel of the end wall of the working well, and the third rubber capsule 2-3-2 is arranged at one end of the end wall of the working well far away from the working well;
s5, a second steel sleeve for receiving the combined pipe jacking machine is arranged on the side wall, close to the inside of the working well, of the working well end wall, and an opening for ejecting a guide pipe of the combined pipe body is formed in one end, far away from the working well end wall, of the second steel sleeve;
s6, filling and expanding the third rubber capsule 2-3-2, compacting the combined pipe body, cutting off stratum water, then removing the second steel sleeve and the combined pipe push bench, installing a third curtain cloth rubber plate 2-3-1 surrounding the combined pipe body at the opening of the end wall of the working well, and arranging the third curtain cloth rubber plate on the side wall of the end wall of the working well facing the inside of the well.
The combined pipe body extends along the annular direction to form a continuous combined pipe body, the continuous combined pipe body receives water stop and the combined pipe body receives water stop measures are the same, rubber capsules and curtain cloth rubber plates are adopted, but a breaking position of a third rubber capsule 2-3-2 of the previous combined pipe body is required to be provided with a fourth rubber capsule 2-3-3 extending along the longitudinal direction, so that water seepage at the breaking position is avoided. The rubber bags of the two adjacent combined pipe bodies are staggered in the front-back direction in the receiving direction.
In order to cope with emergency, a reserved freezing pipeline 4 is arranged on the end wall of the working well and used for freezing the stratum of the outer ring when the rubber bag and the curtain cloth rubber plate are simultaneously waterproof and fail.
Rubber bags are arranged in the direction of the pipe body, which is close to the stratum water, and are pressurized and filled when the sleeve is removed, the curtain cloth rubber plate is installed and other requirements are met, so that the stratum water is blocked. The rubber capsule of the first conduit is a circular ring wound around the steel pipe of the first conduit, the rubber capsule of the combined conduit is in a closed wave shape, the rubber capsule of the post-construction conduit in the continuously combined conduit is an open wave-shaped rubber capsule and is in lap joint with the cord fabric rubber plate or the constructed rubber capsule. The overlapping part of the wavy rubber bag with the constructed rubber bag is provided with a longitudinal partition, and the longitudinal partition is a rubber bag (a fourth rubber bag 2-3-3) which is arranged in a certain range along the longitudinal direction of the jacking pipe and prevents the underground water from flowing through together with the curtain cloth rubber, reaching the water stop ring frame and the like. The rubber bag of the later construction pipe body is arranged on the inner side of the rubber bag of the earlier construction pipe body (the inner side and the outer side are distinguished by the positions of the opposite working well, the side closer to the free surface of the working well is the inner side, and the side closer to the soil outside the working well is the outer side).
Fig. 6-9 are schematic diagrams of cross-sectional arrangement of single guide pipes, fig. 6 is a schematic diagram of cross-sectional arrangement of grouped push pipes, the front of a single guide pipe 6 is connected with a single guide pipe 5, the single guide pipe 6 and a combined pipe body 7 connected with the single guide pipe form a push pipe cutter 7-1 together, and the front of the combined pipe body 7 connected with the single guide pipe is provided with a push pipe pusher cutter. Fig. 8 is a top plan view of a single-pilot pipe receiver, which is the same as the pilot pipe waterproofing measure in the previous embodiment, and fig. 8 shows a single-pilot pipe temporary water stop device, which includes a fourth curtain cloth rubber plate 5-3-1, a fifth rubber capsule 5-3-2, and a cylindrical receiving ring frame 5-3-3.
As shown in fig. 8-9, when receiving single first conduit 5, the fourth cord fabric rubber plate 5-3-1 is used for stopping water, the fifth rubber capsule 5-3-2 is pressurized and swelled before the combined pipe body ring frame and the receiving steel sleeve are installed, stratum inflow is closed, then devices such as the combined pipe body ring frame, the receiving sleeve and the like are installed, the rubber capsule is broken when the push bench cutterhead 7-1 is pushed to the position of the fifth rubber capsule 5-3-2, then the combined pipe body push bench is received, the whole push bench is pushed out of the receiving well, the rubber capsule 8 of the occluding pipe set is pressurized before the push bench is dismounted from the subsequent steel pipe, stratum inflow is closed, then the combined push bench and the receiving steel sleeve are dismounted, and the tunnel door is closed. A fifth curtain cloth rubber plate 7-3-1 surrounding the occlusion pipe group is arranged at the opening of the working well end wall, and the fifth curtain cloth rubber plate is arranged on the side wall of the working well end wall facing the inside of the well.
The invention provides a temporary water stopping method for the construction of the occlusion jacking pipe, which is suitable for the occlusion jacking pipe, can better solve the problem of temporary water stopping in the construction of the occlusion jacking pipe, and effectively reduces the construction risk. Along with the popularization and the use of the occlusion jacking pipe, the water stopping method provided by the invention has a wide development prospect.
The invention provides a temporary water stopping method for receiving construction of a meshed jacking pipe, which comprises the following steps of:
First, the pilot pipe receives the water stop
1. The first guide pipe 1-1 passes through an end wall (side wall of a working well) to enter the working well, a first steel sleeve 1-5 corresponding to the length and the excavation diameter of a guide pipe jacking machine is arranged on a steel ring frame of the end wall of the working well in consideration of the penetration of the excavation profile of a jacking pipe and the gap mud between pipe bodies, and the front end of the first steel sleeve 1-5 is sealed to form a sealed space from the excavation surface of the end wall to the sleeve;
2. The pipe-jacking machine is jacked into a first steel sleeve 1-5, and then a first rubber capsule 1-3-2 buried in an end wall is pressurized and filled, so that the first rubber capsule 1-3-1 is tightly pressed on a pipe behind the pipe-jacking machine, and stratum water is cut off;
3. Then the first steel sleeve 1-5 and the push bench are removed, and a first curtain cloth rubber plate 1-3-2 surrounding the pilot pipe and a clamping plate for preventing the curtain cloth rubber plate from turning out are arranged at the opening;
4. When the combined pipe body is pushed in, the first guide pipe 1-1 and the second guide pipe 1-2 are continuously ejected from the receiving end, and in the process, only the first curtain cloth rubber plate 1-3-2 can be used for stopping water, and two water stopping modes of the first curtain cloth rubber plate 1-3-2 and the first rubber capsule 1-3-1 can also be used;
5. the guide tube is continuously ejected until the combined tube body reaches the receiving end.
(II) Combined pipe body receiving water stop
1. Before the combined pipe body reaches the receiving end, removing a ring frame of a crossing area of the guide pipe, and installing a third rubber capsule 2-3-2 wrapping the combined pipe body, wherein the combined pipe body water stop device 2-3 comprises a third curtain cloth rubber plate 2-3-1 and a third rubber capsule 2-3-2;
2. The second steel sleeve 2-4 received by the combined pipe body is arranged in the end wall, the second steel sleeve 2-4 is used for enveloping all the ranges of the combined pipe body 2, wherein the first guide pipe 2-1 and the second guide pipe 2-2 corresponding to the combined pipe body 2 are used for ensuring normal ejection, the front end of the second steel sleeve 2-4 is provided with a seal of the steel sleeve and the first guide pipe 2-1 and the second guide pipe 2-2, and finally a cylinder space for receiving complete sealing is formed;
3. The third rubber capsule 2-3-2 is filled, stratum water is cut off, then the second steel sleeve 2-4 and the pipe jacking machine are removed, and the third curtain cloth rubber plate 2-3-1 and a clamping plate for limiting the third curtain cloth rubber plate are installed;
(III) the combined pipe body receives the water stop when the pipe bodies are continuously combined
The receiving of the combined tube body when the tube bodies are continuously combined is the same as the step of combining the tube bodies in the above-mentioned (two), except for the setting range of the third rubber capsule 2-3-2 and the receiving of the guide tube 2-1.
1. Because one end of the continuous combined pipe body is connected with the other combined pipe body, the third rubber capsule 2-3-2 cannot be closed, and the pipe body part is required to be disconnected, but a closed waterproof partition is required to be arranged, and a longitudinal partition (a fourth rubber capsule 2-3-3 arranged along the longitudinal direction, namely the receiving direction) is arranged at the joint of the combined pipe bodies.
2. The first guide pipe 2-1 forms two waterproof layers of rubber capsules and curtain rubber plates when the previous section of combined pipe body is constructed, and the C-shaped pipe is ejected out of the stratum without additional waterproof measures.
(IV) construction emergency water stopping method
The temporary water stopping method for the occlusion jacking pipe arrival and receiving mainly relies on rubber capsules and curtain cloth rubber plates to stop water, and meanwhile, a reserved freezing pipeline is arranged on an arrival end wall to cope with emergency, and is used for freezing an outer ring stratum when the rubber capsules and the curtain cloth rubber plates are simultaneously waterproof and fail so as to repair waterproof structures such as the rubber capsules and the curtain cloth rubber plates.
The invention is realized by the following technical means with the attached drawings:
The temporary water stopping method for the occlusion jacking pipe receiving construction comprises four parts, namely a pilot pipe water stopping method, a combined pipe water stopping method during continuous combined pipe body, and an emergency water stopping method for construction, wherein water stopping is mainly carried out by means of rubber capsules and curtain cloth rubber plates, and freezing pipelines are pre-buried for emergency water stopping.
When the meshed pipe jacking receiving working well is constructed, the ring frame blocks, the water stopping structure forms, the number of channels, the front-back position relation and the like are determined in advance according to the pipe jacking axis outline, the combination mode, the construction sequence and the like, and the fixed ring frame, the detachable ring frame and the water stopping structures of all channels are pre-buried in the receiving end wall according to preset positions.
When the pipe jacking machine is meshed, the pipe jacking pipe is jacked, the guide pipe is received by adopting a steel sleeve, a steel sleeve corresponding to the length and the excavation diameter of the guide pipe jacking machine is arranged on a steel ring frame of the end wall of the working well, and the front end of the steel sleeve is closed, so that a closed space from the excavation surface of the end wall to the sleeve is formed.
The pipe jacking machine is characterized in that after the pipe jacking machine is jacked into the sleeve, the rubber bag buried in the end wall is pressurized and filled, so that the rubber bag is tightly pressed on the pipe jacking machine, stratum water supply is cut off, then the sleeve and the pipe jacking machine are disassembled, and a curtain cloth rubber plate surrounding the pipe jacking machine and a clamping plate preventing the curtain cloth rubber plate from turning out are arranged at the hole.
Before the combined pipe reaches the receiving end, the rubber bag corresponding to the pilot pipe is pressurized and swelled, a receiving ring frame of the lap joint part of the combined pipe and the pilot pipe, corresponding curtain cloth rubber plates, clamping plates and other water stopping devices are removed, a sleeve and the rubber bag which can envelop the pilot pipe and the combined pipe are arranged, the rest pilot pipe is received together with a pipe jacking machine of the combined pipe, then the rubber bag of the combined pipe is pressurized, stratum inflow water is cut off, the pipe jacking machine and the sleeve are removed, the curtain cloth rubber plates surrounding the combined pipe and the clamping plates preventing the curtain cloth rubber plates from being turned out are arranged, and the rest combined pipe is received. In the receiving process, only the curtain cloth rubber plate is adopted for water stop, and also the curtain cloth rubber plate and the rubber bag are adopted for water stop in a double way.
After the jacking of the meshed pipe jacking box body (meshed pipe jacking pipe body) is completed, the rubber bag of the box body is pressurized, then the detachable ring frame at the position of the subsequent meshed pipe jacking box body, the corresponding turning plate and the corresponding cord fabric rubber plate are removed, the cord fabric rubber plate corresponding to the subsequent meshed pipe jacking box body is connected, and the subsequent meshed pipe jacking box body is jacked.
And the circulation is performed until the jacking of all the meshed jacking pipe boxes is completed.
When the water stopping structure fails, the outer ring stratum can be frozen through the freezing pipeline pre-buried in the end wall, so that the waterproof structures such as rubber capsules, curtain cloth rubber plates and the like can be repaired.
The foregoing is merely illustrative of the principles of the present invention, and not in limitation of the specific shape, size, arrangement, excavation and materials, so that all possible modifications and equivalents may be resorted to, falling within the scope of the invention as defined by the appended claims.
The invention provides a temporary water stopping method for receiving construction of a meshed jacking pipe, the water stop of the meshed jacking pipe consists of a pilot pipe receiving temporary water stop, a combined pipe body receiving temporary water stop and a subsequent combined pipe body receiving temporary water stop and emergency water stop.
A temporary water stopping method for the guide pipe includes such steps as arranging steel sleeve at hole, arranging rubber capsule at the outer side of end wall, pushing the push pipe into steel sleeve, filling rubber capsule, cutting off underground water, detaching the steel sleeve, installing rubber plate and steel clamping plate at hole, installing rubber capsule and rubber plate, and temporarily stopping water.
A temporary water stopping method for the combined pipe body includes arranging a steel sleeve in an end wall, arranging rubber capsules in the end wall, installing a curtain cloth rubber plate and a steel clamping plate after the pipe pushing machine is disassembled, pushing the pipe pushing machine into the steel sleeve to fill the rubber capsules to cut off the underground water flowing-in passage, stopping water by adopting the curtain cloth rubber plate and the rubber capsules or the curtain cloth rubber plate after the pipe pushing machine is disassembled, enabling the rubber capsules to cover the range of the pipe body which is pushed once, arranging longitudinal cuts at the position where the pipe body is connected with a guide pipe, and arranging adjacent combined pipe body rubber capsules in a staggered mode, wherein the combined pipe body rubber capsules which are firstly constructed are arranged in front of the tunneling direction, and the combined pipe body rubber capsules which are later constructed are arranged behind the tunneling direction.
The temporary water stop is received by the meshed jacking pipe, mainly depends on the water stop of the rubber capsule and the curtain cloth rubber plate, and meanwhile, a reserved freezing pipe is arranged on the end wall, so that the stratum of the outer ring is frozen when the rubber capsule and the curtain cloth rubber plate are simultaneously in waterproof failure, and waterproof structures such as the rubber capsule and the curtain cloth rubber plate are restored.
What is not described in detail in this specification is prior art known to those skilled in the art.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (5)
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| CN202211435796.4A CN115749867B (en) | 2022-11-16 | 2022-11-16 | A temporary water-stopping method for bite-jacking construction |
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| CN202211435796.4A CN115749867B (en) | 2022-11-16 | 2022-11-16 | A temporary water-stopping method for bite-jacking construction |
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| CN119878206A (en) * | 2025-02-24 | 2025-04-25 | 中铁第四勘察设计院集团有限公司 | Door ring frame structure for construction of occluded jacking pipe and construction method of occluded jacking pipe |
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| CN114961798B (en) * | 2022-06-01 | 2025-07-04 | 中铁四局集团第一工程有限公司 | A water-stopping device for the opening of a jacking well in caisson construction and a construction method thereof |
| CN114992382B (en) * | 2022-06-01 | 2023-05-16 | 中铁四局集团第一工程有限公司 | Open caisson method construction muddy water balance pipe jacking working well opening construction method |
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