CN112524338A - Pipe jacking construction system for bidirectional jacking and construction process thereof - Google Patents
Pipe jacking construction system for bidirectional jacking and construction process thereof Download PDFInfo
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- CN112524338A CN112524338A CN202011484360.5A CN202011484360A CN112524338A CN 112524338 A CN112524338 A CN 112524338A CN 202011484360 A CN202011484360 A CN 202011484360A CN 112524338 A CN112524338 A CN 112524338A
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- jacking
- pipe
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
- F16L1/024—Laying or reclaiming pipes on land, e.g. above the ground
- F16L1/028—Laying or reclaiming pipes on land, e.g. above the ground in the ground
- F16L1/036—Laying or reclaiming pipes on land, e.g. above the ground in the ground the pipes being composed of sections of short length
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
- F16L1/024—Laying or reclaiming pipes on land, e.g. above the ground
- F16L1/06—Accessories therefor, e.g. anchors
Abstract
The invention aims to provide a pipe jacking construction system for bidirectional jacking and a construction process thereof, wherein two sides of a pipe jacking starting well can be excavated and jacked by only one set of combined jack jacking system, so that the space and construction time required by jacking pipe jacking are reduced, the support reaction force during jacking of a pipe jacking pipeline at one end can be provided by the side resistance, the head-on resistance and the jacks of the working well and the pipe jacking at the other end, and a relay room can be arranged according to different conditions. The two-way jacking of the jacking pipes can ensure that when equipment in one working area fails, the jacking pipes in the other working area can still be constructed. The method has high efficiency and can solve the problem that the existing pipe jacking construction process can only carry out one-way jacking.
Description
Technical Field
The invention relates to the technical field of municipal construction, in particular to a pipe jacking construction system for bidirectional jacking and a construction process thereof.
Background
The pipe-jacking construction is a non-excavation construction method, is a pipeline burying construction technology without excavation or with few excavations, and is mainly applied to municipal works in the present stage, the pipe-jacking construction is that a jacking force generated by jacking equipment is used in a working pit to overcome the friction force between a pipeline and surrounding soil, the pipeline is jacked into the soil according to a designed route and the earth is transported away, after one section of the pipeline is jacked into the soil layer, the next second section of the pipeline is jacked continuously, and the principle is that a tool pipe or a heading machine is pushed into a receiving pit from the working pit through the soil layer and lifted by means of thrusts such as a main jacking oil cylinder, a pipeline room, a relay room and the like. The pipeline is buried between the two pits after following the tool pipe or the development machine, the difficult problems of damage to urban buildings and blockage of road traffic in the pipeline burying construction are solved by the pipe-jacking construction, and the advantages of the pipeline are highlighted in the aspects of soil layer stabilization and environmental protection; this is very important for cities with heavy traffic, dense population, numerous ground buildings and complex underground pipelines, which will create a clean, comfortable and beautiful environment for the cities.
The jacking pipe is the most commonly used tool in the jacking pipe construction, but the jacking pipes in the prior art are all one-way jacking pipes, namely only one set of jacking equipment is arranged in one jacking pipe well, and only one-way jacking pipe construction can be carried out. If the bidirectional jacking pipe jacking is carried out, a plurality of jacking facilities are needed, the construction mode has the advantages of lower working efficiency, long construction period and large occupied area, and meanwhile, the construction cost is increased.
Disclosure of Invention
The invention aims to provide a pipe jacking construction system for bidirectional jacking and a construction process thereof, wherein two sides of a pipe jacking starting well can be excavated and jacked by only one set of jack, so that the space required by jacking of the pipe jacking and the pipe jacking construction time are reduced, the support reaction force during jacking of a pipe jacking pipeline at one end can be provided by the side resistance and the head-on resistance of the working well and the pipe jacking at the other end and the jack, and meanwhile, the relay of the pipe jacking at the two ends can provide power for jacking of the pipe jacking in the working area and also provide support reaction force for jacking of the pipe jacking in the other working area. The two-way jacking of the jacking pipes can ensure that when equipment in one working area fails, the jacking pipes in the other working area can still be constructed. The method has high efficiency and can solve the problem that the existing pipe jacking construction process can only carry out one-way jacking.
In order to achieve the above object, in one aspect, the present invention provides a pipe jacking construction system for bidirectional jacking, comprising a pipe jacking starting well, a combined jack jacking system, a guide rail, and a jacking iron; the pipe jacking originating well is of a concrete structure and/or a steel structure and comprises a side wall and a bottom plate; the pipe-jacking starting well is positioned in the middle of the proposed tunnel, the proposed tunnel penetrates through the starting well, two wall-penetrating holes are formed in two side walls of the opposite sides of the starting well respectively, the two side walls of the starting well are orthogonal to the axis of the proposed tunnel, and the two wall-penetrating holes are matched with the section of the proposed tunnel; the combined jack jacking system is placed on the guide rail, the two ends of the combined jack jacking system are provided with combined steel structure end plates, the middle part of the combined jack jacking system is provided with a group of jacks, the bottom part of the combined jack jacking system is provided with a limiting device, and the combined steel structure end plates at the two ends are alternately used as a fixed end and a jacking end when a jacking pipe is jacked; the combined jack jacking system can move along the guide rail, and the axis of the jack is parallel to the axis of the proposed tunnel; the guide rail is positioned on a bottom plate of the push pipe starting well and fixedly connected with the bottom plate, so that the axis of the guide rail is parallel to the axis of the proposed tunnel; the jacking iron is placed on the guide rail and used as a force transmission mechanism for jacking the jacking pipe, so that the axis of the jacking iron and the axis of the jacking pipe are parallel to the axis of the proposed tunnel; the pipe jacking construction system can carry out bidirectional pipe jacking construction.
Furthermore, the pipe jacking starting well needs to meet the requirements of installing a pipe jacking machine head, a combined jack jacking system, a relay room, a guide rail, a jacking iron, a pipe jacking, a matching system, wall penetrating water stopping at two ends and operating space; the depth of the pipe jacking starting well is the sum of the pipe bottom burial depth, the height of the guide rail and the thickness of the guide rail foundation; the bottom plate of the pipe-jacking originating well is of a reinforced concrete structure, the thickness of the bottom plate is determined according to the strength and deformation requirements, the side wall of the pipe-jacking originating well is of a reinforced concrete structure and/or a steel structure, the thickness and the height of the side wall of the pipe-jacking originating well are determined according to the strength and deformation requirements, and the bottom plate and the side wall of the pipe-jacking originating well are rigidly connected into a whole.
Furthermore, two ends of the combined jack jacking system are provided with combined steel structure end plates, the middle part is provided with a group of jacks, and the bottom part is provided with a limiting device; the combined jack jacking system is positioned on the guide rail and can move along the guide rail; two ends of the jack are connected with combined steel structure end plates, one combined steel structure end plate is fixed with the side wall of the pipe jacking starting well through bolts in the jacking process, and the other combined steel structure end plate is in contact with jacking iron and used for jacking the pipe jacking; the combined steel structure jacking system comprises a combined steel structure end plate, a bottom plate and two side limiting devices, wherein the two side limiting devices are L-shaped structures and fixed on the bottom plate and used for limiting displacement deviation generated in the jacking process of a jacking system of the combined jack.
Further, the tonnage value of the jack is selected according to the pipe diameter and length of the jacking pipe, the pipe diameter and length of the jacking iron and geological conditions; the area of the combined steel structure end plate is determined according to the maximum jacking force required by jacking pipes, and the thickness and the model of the combined steel structure end plate are determined according to design requirements; when the tonnage value or the counter force of the jack does not meet the requirement of integral jacking of the jacking pipe, a relay room needs to be added among the jacking pipe segments; the selection of the relay is determined according to the tonnage value of the jack, the pipe diameter and the length of the jacking pipe, the pipe diameter and the length of the jacking iron and geological conditions.
Furthermore, when the jacking pipe is jacked into one through-wall hole, the combined steel structure end plate in contact with the end jacking iron is used as a jacking end at the moment, and the combined steel structure end plate at the other end is fixedly connected to the side wall where the other through-wall hole is located through bolts and used as a fixed end when the jacking pipe is jacked; and screw holes are reserved in the corresponding positions of the side walls and the combined steel structure end plates where the bolts are reserved in advance and are used for bolt connection.
Further, the guide rail is in a form of directly laying steel rails on a reinforced concrete foundation or a steel rail laying form on a steel platform foundation, and the rigidity and the strength of the guide rail foundation need to meet construction requirements; the horizontal position and the elevation of the guide rail are determined according to the buried depth of the jacking pipe; the guide rail is fixed on the guide rail foundation, and displacement deviation in the construction process is limited.
On the other hand, aiming at the pipe jacking construction system for bidirectional jacking, the invention provides a construction process for bidirectional jacking, which comprises the following steps:
s1: surveying and setting out, namely confirming the excavation line of the position of the pipe-jacking starting well of the pipeline according to the central point of the designed pipeline, surveying whether the pipeline has construction conditions on site, and marking the excavation line of the pipe-jacking starting well after on-site investigation and confirmation of reaching the construction conditions;
s2: excavating construction, namely excavating a pipe jacking starting well according to the marked excavation line, supporting a formwork of the pipe jacking starting well after excavating to a specified elevation, and pouring concrete after the formwork is installed;
s3: installing equipment, namely placing required pipe-jacking construction equipment into the pipe-jacking starting well after the pipe-jacking starting well meets the strength standard, and sequentially installing the required pipe-jacking construction equipment; when the jacking system of the combined jack is installed, two combined steel structure end plates are respectively fixed at two ends of the jack by bolts;
s4: jacking a jacking pipe, wherein a combined jack jacking system arranged in the jacking pipe starting well starts to work;
s41: when one end of a jacking pipe is jacked into the through-wall hole, the combined steel structure end plate at the jacking end, the jack and the jacking iron act together to jack the jacking pipe into the through-wall hole, the other end of the jack and the combined steel structure end plate are fixed on the side wall of the other end of the jacking pipe originating well, and the combined steel structure end plate serves as a fixed end for jacking the jacking pipe;
s42: after all pipe joints of one end of the jacking pipe are jacked into the through-wall hole, the jack is retracted to the initial state, at the moment, the jack is moved to the through-wall hole position where jacking construction of the jacking pipe is completed along the guide rail, the combined steel structure end plate is fixed on the side wall of the jacking pipe originating well at the jacking end of the jacking pipe and used as a fixed end when jacking pipes in the other direction, and the other end of the combined steel structure end plate is used as a jacking end when jacking pipes are jacked in; until all pipe joints of the jacking pipe in the other direction are jacked;
alternatively, the first and second electrodes may be,
s41': when a jacking pipe is jacked into a wall penetrating hole on one side, a combined steel structure end plate at the jacking end, a jack and a jacking iron act together to jack the jacking pipe into the wall penetrating hole on one side, the other end of the jack and the combined steel structure end plate are required to be fixed on the side wall of the other end of a starting well of the jacking pipe, and the combined steel structure end plate serves as a fixed end for jacking of the jacking pipe;
s42': after one section of jacking pipe finishes jacking into the wall penetrating hole on one side, the jack is retracted to the initial state, at the moment, the jack is moved to the wall penetrating hole position where jacking construction of the jacking pipe is finished along the guide rail, and the combined steel structure end plate is fixed on the side wall of the jacking pipe originating well at the jacking end of the jacking pipe and is used as a fixed end when the jacking pipe is jacked in the other direction;
s43': and repeating and alternately performing the steps S41 '-S42' until the construction of all pipe joints of the jacking pipe is completed.
Preferably, the axis of the proposed tunnel, the axis of the jacking system of the combined jack, the axis of the guide rail, the axis of the jacking iron and the axis of the jacking pipe are kept unchanged according to design requirements in the whole bidirectional jacking pipe construction process.
Preferably, in the two-way jacking construction process of the jacking pipe, the thixotropic slurry injection and jacking pipe jacking are ensured to be synchronously carried out; in the two-way jacking construction process of the jacking pipe, inert gas can be injected at high pressure at the periphery of the slurry, so that the side resistance in the jacking process of the jacking pipe is reduced to a greater extent.
Preferably, the method is characterized in that in the two-way jacking construction process of the jacking pipe, jacking of the jacking pipe and deslagging in the pipeline are simultaneously carried out; and waterproofing, monitoring, deviation rectifying, lighting and ventilating are required in the jacking process.
Compared with the prior art, the two-way jacking pipe jacking construction system and the construction process have the following advantages:
the two sides of the push pipe starting well can be excavated and jacked only by one set of jack, the space required for jacking the push pipes and the push pipe construction time are reduced, supporting reaction force during jacking of the push pipe pipeline at one end is provided by lateral resistance and head-on resistance of the working well and the push pipe at the other end, and meanwhile, power can be provided for jacking of the push pipes in the working area between relays of the push pipes at the two ends, and supporting reaction force can also be provided for jacking of the push pipes in another working area. The two-way jacking of the jacking pipes can ensure that when equipment in one working area fails, the jacking pipes in the other working area can still be constructed. The method has high efficiency and can solve the problem that the existing pipe jacking construction process can only carry out one-way jacking.
The jacking device can ensure that in the two-way jacking process of the jacking pipe, if equipment in the jacking process of one direction fails, the jacking of the jacking pipe in the other direction can be normally carried out, the construction efficiency is ensured, and the space of a working well is reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain, without limitation, the principles of the invention and to enable a person skilled in the art to make and use the invention as provided in the appended claims. In the drawings:
FIG. 1 is a sectional view of a combined jack jacking system, which is a pipe jacking construction system for bidirectional jacking and a construction process thereof;
FIG. 2 is a cross-sectional view of "a pipe jacking construction system for bidirectional jacking and construction process thereof" in FIG. 2;
FIG. 3 is a schematic top view of a working well, namely a pipe jacking construction system for bidirectional jacking and a construction process thereof;
FIGS. 4 to 5 are schematic sectional views of "a pipe jacking construction system for bidirectional jacking and a construction process thereof" during pipe jacking;
FIGS. 6 to 7 are a pipe-jacking construction flow chart of a pipe-jacking construction system for bidirectional jacking and a construction process thereof.
Description of reference numerals:
1. a pipe jacking starting well; 11. a side wall; 12. a base plate; 13. penetrating a wall hole; 2. a combined jack jacking system; 21. a jack; 22. combining steel structure end plates; 23. a limiting device; 3. a guide rail; 31. a guide rail foundation; 4. carrying out iron jacking; 5. jacking pipes; 6. a relay room; 71. a bolt; 72. and a screw hole.
Detailed Description
As shown in figures 1-4, the invention provides a pipe jacking construction system for bidirectional jacking, which is characterized by comprising a pipe jacking starting well (1), a combined jack jacking system (2), a guide rail (3) and a jacking iron (4); the pipe jacking originating well (1) is of a concrete structure and/or a steel structure and comprises a side wall (11) and a bottom plate (12); the pipe-jacking starting well (1) is positioned in the middle of the proposed tunnel, the proposed tunnel penetrates through the starting well, two wall-penetrating holes (13) are formed in two side walls (11) on the opposite sides of the starting well respectively, the two side walls (11) of the starting well are orthogonal to the axis of the proposed tunnel, and the two wall-penetrating holes (13) are matched with the section of the proposed tunnel; the combined jack jacking system (2) is placed on the guide rail (3), the two ends of the combined jack jacking system are provided with combined steel structure end plates (22), the middle part of the combined jack jacking system is provided with a group of jacks (21), the bottom part of the combined jack jacking system is provided with a limiting device (23), and the combined steel structure end plates (22) at the two ends are alternately used as a fixed end and a jacking end when the jacking pipe (5) is jacked in; the combined jack jacking system (2) can move along the guide rail (3), and the axis of the jack (21) is parallel to the axis of the proposed tunnel; the guide rail (3) is positioned on a bottom plate (12) of the push pipe originating well (1) and fixedly connected with the bottom plate (12) to ensure that the axis of the guide rail (3) is parallel to the axis of the proposed tunnel; the jacking iron (4) is placed on the guide rail (3) and used as a force transmission mechanism for jacking the jacking pipe (5), so that the axis of the jacking iron (4) and the axis of the jacking pipe (5) are ensured to be parallel to the axis of the proposed tunnel; the pipe jacking construction system can carry out bidirectional pipe jacking (5) construction.
Furthermore, the pipe jacking starting well (1) needs to meet the requirements of installing a pipe jacking machine head, a combined jack jacking system (2), a relay chamber (6), a guide rail (3), a jacking iron (4), a pipe jacking (5), a matching system, wall penetrating water stopping at two ends and operating space; the depth of the pipe jacking initial well (1) is the sum of the pipe bottom burial depth, the height of the guide rail (3) and the thickness of the guide rail foundation (31); the bottom plate (12) of the pipe-jacking originating well (1) is of a reinforced concrete structure, the thickness of the bottom plate is determined according to the strength and deformation requirements, the side wall (11) of the pipe-jacking originating well (1) is of a reinforced concrete structure and/or a steel structure, the thickness and the height of the side wall are determined according to the strength and deformation requirements, and the bottom plate (12) and the side wall (11) of the pipe-jacking originating well (1) are rigidly connected into a whole.
Furthermore, two ends of the combined jack jacking system (2) are provided with combined steel structure end plates (22), the middle part is provided with a group of jacks (21), and the bottom part is provided with a limiting device (23); the combined jack jacking system (2) is positioned on the guide rail (3) and can move along the guide rail (3); two ends of the jack (21) are connected with combined steel structure end plates (22), one side of each combined steel structure end plate (22) is fixed with the side wall (11) of the pipe jacking initial well (1) through bolts (71) in the jacking process, and the other side of each combined steel structure end plate (22) is in contact with the jacking iron (4) and is used for jacking a pipe jacking (5); and the bottom and two sides of the combined steel structure end plate (22) are provided with limiting devices (23), the limiting devices (23) on the two sides are of L-shaped structures and are fixed on the bottom plate for limiting displacement deviation generated in the jacking process of the jacking system (2) of the combined jack in the jacking pipe (5).
Furthermore, the tonnage value of the jack (21) is selected according to the pipe diameter and the length of the jacking pipe (5), the pipe diameter and the length of the jacking iron (4) and geological conditions; the area of the combined steel structure end plate (22) is determined according to the maximum jacking force required when the jacking pipe (5) is jacked in, and the thickness and the type of the combined steel structure end plate (22) are determined according to design requirements; when the tonnage value or the counter force of the jack (21) does not meet the requirement of jacking the whole jacking pipe (5), a relay chamber (6) needs to be added between the pipe pieces of the jacking pipe (5); the selection of the relay room (6) is determined according to the tonnage value of the jack (21), the pipe diameter size and length of the jacking pipe (5), the pipe diameter size and length of the jacking iron (4) and geological conditions.
Furthermore, when the jacking pipe (5) is jacked into one through-wall hole (13), the combined steel structure end plate (22) contacted with the end jacking iron (4) is used as a jacking end at the moment, and the combined steel structure end plate (22) at the other end is fixedly connected to the side wall (11) where the other through-wall hole (13) is located through a bolt (71) and is used as a fixed end when the jacking pipe (5) is jacked; and screw holes (72) are reserved in the corresponding positions of the side wall (11) and the combined steel structure end plate (22) where the bolts (71) are reserved and are used for connecting the bolts (71).
Further, the guide rail (3) is in a form of directly laying steel rails by using a reinforced concrete foundation or a form of laying steel rails by using a steel platform foundation, and the rigidity and the strength of the guide rail foundation (31) need to meet construction requirements; the horizontal position and the elevation of the guide rail (3) are determined according to the buried depth of the top pipe (5); the guide rail (3) is fixed on a guide rail foundation (31) to limit displacement deviation in the construction process.
On the other hand, aiming at the pipe jacking construction system for bidirectional jacking, the invention provides a construction process for bidirectional jacking, which comprises the following steps:
s1: surveying and setting out, namely confirming the excavation line at the position of the pipe jacking starting well (1) of the pipeline according to the central point of the designed pipeline, surveying whether the pipeline has construction conditions on site, and marking the excavation line of the pipe jacking starting well (1) after the pipeline is checked and confirmed on site to reach the construction conditions;
s2: excavating construction, namely excavating the jacking pipe starting well (1) according to the marked excavation line, supporting a formwork on the jacking pipe starting well (1) after excavating to a specified elevation, and pouring concrete after the formwork is installed;
s3: installing equipment, namely after the pipe-jacking starting well (1) reaches the strength standard, putting required pipe-jacking (5) construction equipment into the pipe-jacking starting well (1) and sequentially installing the required pipe-jacking construction equipment; when the combined jack jacking system (2) is installed, two combined steel structure end plates (22) are respectively fixed at two ends of a jack (21) by bolts (71);
s4: jacking a jacking pipe (5), and starting working of a combined jack jacking system (2) arranged in the jacking pipe originating well (1);
s41: when the jacking pipe (5) at one end is jacked into the through-wall hole (13), the combined steel structure end plate (22) at the jacking end, the jack (21) and the jacking iron (4) act together to jack the jacking pipe (5) into the through-wall hole (13), the other end of the jack (21) and the combined steel structure end plate (22) are required to be fixed on the side wall (11) at the other end of the jacking pipe starting well (1), and the combined steel structure end plate (22) serves as a fixed end for jacking the jacking pipe (5);
s42: after all pipe joints of the one-end jacking pipe (5) are jacked into the through-wall hole (13), the jack (21) retracts to an initial state, at the moment, the jack (21) is moved to the position of the through-wall hole (13) where jacking construction of the jacking pipe (5) is completed along the guide rail (3), the combined steel structure end plate (22) is fixed on the side wall (11) of the jacking pipe starting well (1) at the jacking end of the jacking pipe (5) and used as a fixed end when the jacking pipe (5) is jacked in the other direction, and the other end of the combined steel structure end plate (22) is used as a jacking end when the jacking pipe (5) is jacked in; until all pipe joints of the jacking pipe (5) in the other direction are jacked;
alternatively, the first and second electrodes may be,
s41': when the jacking pipe (5) is jacked into the wall penetrating hole (13) on one side, a combined steel structure end plate (22) at the jacking end, a jack (21) and a jacking iron (4) act together to jack the jacking pipe (5) into the wall penetrating hole (13) on one side, the other end of the jack (21) and the combined steel structure end plate (22) are required to be fixed on the side wall (11) at the other end of the jacking pipe starting well (1), and the combined steel structure end plate (22) serves as a fixed end for jacking the jacking pipe (5);
s42': after one section of jacking pipe (5) finishes jacking into a wall penetrating hole (13) on one side, the jack (21) retracts to an initial state, at the moment, the jack (21) is moved to the position of the wall penetrating hole (13) which finishes jacking construction of the jacking pipe (5) along the guide rail (3), and the combined steel structure end plate (22) is fixed on the side wall (11) of the jacking pipe originating well (1) at the jacking end of the jacking pipe (5) and is used as a fixed end when the jacking pipe (5) in the other direction jacks;
s43': and repeating and alternately performing the steps S41 '-S42' until the construction of all pipe joints of the jacking pipe (5) is completed.
Preferably, the axis of the proposed tunnel, the axis of the combined jack jacking system (2), the axis of the guide rail (3), the axis of the jacking iron (4) and the axis of the jacking pipe (5) are kept unchanged according to design requirements in the whole construction process of the bidirectional jacking pipe (5).
Preferably, in the two-way jacking construction process of the jacking pipe, the thixotropic slurry injection and jacking of the jacking pipe (5) are ensured to be synchronously carried out; in the two-way jacking construction process of the jacking pipe (5), inert gas can be injected at the periphery of the slurry under high pressure, so that the side resistance of the jacking pipe (5) in the jacking process can be reduced to a greater extent.
Preferably, the method is characterized in that in the two-way jacking construction process of the jacking pipe, jacking of the jacking pipe (5) and deslagging in the pipeline are simultaneously carried out; and waterproofing, monitoring, deviation rectifying, lighting and ventilating are required in the jacking process.
Claims (10)
1. A pipe jacking construction system for bidirectional jacking is characterized by comprising a pipe jacking starting well, a combined jack jacking system, a guide rail and jacking irons; the pipe jacking originating well is of a concrete structure and/or a steel structure and comprises a side wall and a bottom plate; the pipe-jacking starting well is positioned in the middle of the proposed tunnel, the proposed tunnel penetrates through the starting well, two wall-penetrating holes are formed in two side walls of the opposite sides of the pipe-jacking starting well respectively, the two side walls of the pipe-jacking starting well are orthogonal to the axis of the proposed tunnel, and the two wall-penetrating holes are matched with the section of the proposed tunnel; the combined jack jacking system is placed on the guide rail, the two ends of the combined jack jacking system are provided with combined steel structure end plates, the middle part of the combined jack jacking system is provided with a group of jacks, the bottom part of the combined jack jacking system is provided with a limiting device, and the combined steel structure end plates at the two ends are alternately used as a fixed end and a jacking end when a jacking pipe is jacked; the combined jack jacking system can move along the guide rail, and the axis of the jack is parallel to the axis of the proposed tunnel; the guide rail is positioned on a bottom plate of the push pipe starting well and fixedly connected with the bottom plate, so that the axis of the guide rail is parallel to the axis of the proposed tunnel; the jacking iron is placed on the guide rail and used as a force transmission mechanism for jacking the jacking pipe, so that the axis of the jacking iron and the axis of the jacking pipe are parallel to the axis of the proposed tunnel; the pipe jacking construction system can carry out bidirectional pipe jacking construction.
2. The pipe jacking construction system for the bidirectional jacking according to claim 1, wherein the pipe jacking starting well needs to meet the requirements of installing a pipe jacking machine head, a combined jack jacking system, a relay room, a guide rail, a jacking iron, a pipe jacking, a matching system, wall penetrating water stopping at two ends and an operation space; the depth of the pipe jacking starting well is the sum of the pipe bottom burial depth, the height of the guide rail and the thickness of the guide rail foundation; the bottom plate of the pipe-jacking originating well is of a reinforced concrete structure, the thickness of the bottom plate is determined according to the strength and deformation requirements, the side wall of the pipe-jacking originating well is of a reinforced concrete structure and/or a steel structure, the thickness and the height of the side wall of the pipe-jacking originating well are determined according to the strength and deformation requirements, and the bottom plate and the side wall of the pipe-jacking originating well are rigidly connected into a whole.
3. A pipe jacking construction system for two-way jacking according to claim 1 wherein said combination jack jacking system is located on a guide rail, movable along the guide rail; two ends of the jack are connected with combined steel structure end plates, one combined steel structure end plate is fixed with the side wall of the pipe jacking starting well through bolts in the jacking process, and the other combined steel structure end plate is in contact with jacking iron and used for jacking the pipe jacking; the combined steel structure jacking system comprises a combined steel structure end plate, a bottom plate and two side limiting devices, wherein the two side limiting devices are L-shaped structures and fixed on the bottom plate and used for limiting displacement deviation generated in the jacking process of a jacking system of the combined jack.
4. The pipe jacking construction system for bidirectional jacking according to claim 1, wherein the tonnage value of the jack is selected according to the pipe diameter and length of the pipe jacking and geological conditions; the area of the combined steel structure end plate is determined according to the maximum jacking force required by jacking pipes, and the thickness and the model of the combined steel structure end plate are determined according to the requirements of strength and rigidity; when the tonnage value or the counter force of the jack does not meet the requirement of integral jacking of the jacking pipe, a relay room needs to be added among the jacking pipe segments; the selection of the relay is determined according to the tonnage value of the jack, the pipe diameter and the length of the jacking pipe and geological conditions.
5. The pipe jacking construction system for the bidirectional jacking according to claim 1, wherein when the pipe jacking is jacked into a through-wall hole, the combined steel structure end plate in contact with the end jacking iron is used as a jacking end at this time, and the combined steel structure end plate at the other end is fixedly connected to the side wall of the other through-wall hole through bolts to be used as a fixed end when the pipe jacking is jacked; and screw holes are reserved in the corresponding positions of the side walls and the combined steel structure end plates where the bolts are reserved in advance and are used for bolt connection.
6. The pipe jacking construction system for the bidirectional jacking according to claim 1, wherein the guide rail is in a form of directly laying steel rails on a reinforced concrete foundation or laying steel rails on a steel platform foundation, and the rigidity and strength of the guide rail foundation are required to meet construction requirements; the horizontal position and the elevation of the guide rail are determined according to the buried depth of the jacking pipe; the guide rail is fixed on the guide rail foundation, and displacement deviation in the construction process is limited.
7. A pipe jacking construction process for bidirectional jacking is characterized by comprising the following specific using method steps:
s1: surveying and setting out, namely confirming the excavation line of the position of the pipe-jacking starting well of the pipeline according to the central point of the designed pipeline, surveying whether the pipeline has construction conditions on site, and marking the excavation line of the pipe-jacking starting well after on-site investigation and confirmation of reaching the construction conditions;
s2: excavating construction, namely excavating a pipe jacking starting well according to the marked excavation line, supporting a formwork of the pipe jacking starting well after excavating to a specified elevation, and pouring concrete after the formwork is installed;
s3: installing equipment, namely placing required pipe-jacking construction equipment into the pipe-jacking starting well after the pipe-jacking starting well meets the strength standard, and sequentially installing the required pipe-jacking construction equipment; when the jack-in system of the combined jack is installed, two combined steel structure end plates are respectively fixed at two ends of the jack by bolts;
s4: jacking a jacking pipe, wherein a combined jack jacking system arranged in the jacking pipe starting well starts to work;
s41: when one end of a jacking pipe is jacked into the through-wall hole, the combined steel structure end plate at the jacking end, the jack and the jacking iron act together to jack the jacking pipe into the through-wall hole, the other end of the jack and the combined steel structure end plate are fixed on the side wall of the other end of the jacking pipe originating well, and the combined steel structure end plate serves as a fixed end for jacking the jacking pipe;
s42: after all pipe joints of one end of the jacking pipe are jacked into the through-wall hole, the jack is retracted to the initial state, at the moment, the jack is moved to the through-wall hole position where jacking construction of the jacking pipe is completed along the guide rail, the combined steel structure end plate is fixed on the side wall of the jacking pipe originating well at the jacking end of the jacking pipe and used as a fixed end when jacking pipes in the other direction, and the other end of the combined steel structure end plate is used as a jacking end when jacking pipes are jacked in; until all pipe joints of the jacking pipe in the other direction are jacked;
alternatively, the first and second electrodes may be,
s41': when the jacking pipe is jacked into the wall penetrating hole at one side, the combined steel structure end plate at the jacking end, the jack and the jacking iron act together to jack the jacking pipe into the wall penetrating hole, the other end of the jack and the combined steel structure end plate are fixed on the side wall of the other end of the jacking pipe originating well, and the combined steel structure end plate serves as a fixed end for jacking the jacking pipe;
s42': after one section of jacking pipe finishes jacking into the wall penetrating hole on one side, the jack is retracted to the initial state, at the moment, the jack is moved to the wall penetrating hole position where jacking construction of the jacking pipe is finished along the guide rail, and the combined steel structure end plate is fixed on the side wall of the jacking pipe originating well at the jacking end of the jacking pipe and is used as a fixed end when the jacking pipe is jacked in the other direction;
s43': and repeating and alternately performing the steps S41 '-S42' until the construction of all pipe joints of the jacking pipe is completed.
8. The pipe jacking construction process for the bidirectional jacking according to claim 7, wherein the axis of the proposed tunnel, the jacking system of the combined jack, the axis of the guide rail, the axis of the jacking iron and the axis of the jacking pipe are kept unchanged according to design requirements in the whole bidirectional pipe jacking construction process.
9. The pipe jacking construction process of claim 7, wherein during the pipe jacking construction process, the thixotropic slurry injection and the pipe jacking are ensured to be carried out synchronously; and in the two-way jacking construction process of the jacking pipe, high-pressure injection of inert gas is performed on the periphery of the slurry, so that the side resistance in the jacking process of the jacking pipe is reduced to a greater extent.
10. The pipe jacking construction process of any one of claims 7 to 9, wherein in the pipe jacking two-way jacking construction process, the pipe jacking and the deslagging in the pipeline are ensured to be carried out simultaneously; the jacking process needs waterproof, monitoring, deviation rectifying, lighting and ventilating.
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| CN113309141A (en) * | 2021-05-14 | 2021-08-27 | 陕西华山路桥集团有限公司 | Pipeline open-cut jacking construction method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113309141A (en) * | 2021-05-14 | 2021-08-27 | 陕西华山路桥集团有限公司 | Pipeline open-cut jacking construction method |
| CN114017061A (en) * | 2021-10-21 | 2022-02-08 | 广东省基础工程集团有限公司 | Relay room device capable of bidirectionally mounting duct pieces in pipeline and construction method |
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| CN114215964A (en) * | 2021-12-27 | 2022-03-22 | 中建协和建设有限公司 | Large-curvature corner-adjustable compensation hinge construction method for large-diameter municipal engineering jacking pipe |
| CN114215964B (en) * | 2021-12-27 | 2023-08-04 | 中建协和建设有限公司 | Large-curvature corner adjustable compensation hinge construction method for large-diameter municipal engineering jacking pipe |
| CN114754194A (en) * | 2022-03-26 | 2022-07-15 | 北京金河水务建设集团有限公司 | Storage tank top pipe installation device and construction method thereof |
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| CN117307816B (en) * | 2023-11-28 | 2024-04-09 | 中国建筑第六工程局有限公司 | Construction method for long-distance side-penetrating old drainage concrete pipeline of jacking pipe |
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