CN115110973A - Connecting channel pipe jacking construction backrest system and using method thereof - Google Patents
Connecting channel pipe jacking construction backrest system and using method thereof Download PDFInfo
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- CN115110973A CN115110973A CN202210881180.3A CN202210881180A CN115110973A CN 115110973 A CN115110973 A CN 115110973A CN 202210881180 A CN202210881180 A CN 202210881180A CN 115110973 A CN115110973 A CN 115110973A
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- oil cylinder
- traction
- cylinder
- backrest
- propulsion
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/40—Devices or apparatus specially adapted for handling or placing units of linings or supporting units for tunnels or galleries
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/08—Lining with building materials with preformed concrete slabs
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/0607—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield being provided with devices for lining the tunnel, e.g. shuttering
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Abstract
The invention discloses a connecting channel pipe-jacking construction backrest system and a using method thereof, wherein the backrest system comprises a reinforcing mechanism, a traction oil cylinder, a backrest mechanism and a pressure control table, the reinforcing mechanism is correspondingly arranged on the soil-back side of a shield segment on the periphery of an initial opening, and a plurality of shield segments on the periphery of the initial opening are connected into a whole, the traction oil cylinder is horizontally arranged between the reinforcing mechanism and the backrest mechanism, the backrest mechanism is correspondingly arranged on one side of a shield tunnel far away from the initial opening, the wall surface of one side of the backrest mechanism close to the initial opening is used as a back-supporting surface of a propulsion oil cylinder to be connected with the fixed end of the propulsion oil cylinder in an abutting mode, and the pressure control table is connected with the traction oil cylinder and the propulsion oil cylinder through connecting pipelines and used for balancing the pressure of the traction oil cylinder and the propulsion oil cylinder. The invention realizes the dispersed stress of the tunnel segment by the backrest system mainly based on traction, solves the problems of stress, deformation and overlarge segment joint dislocation of the shield tunnel structure, and effectively ensures the safety and waterproofness of the shield tunnel structure.
Description
Technical Field
The invention relates to the technical field of interconnection channel pipe-jacking construction, in particular to an interconnection channel pipe-jacking construction backrest system and a using method thereof.
Background
Through development and utilization of urban underground spaces for many years, available resources of shallow underground spaces are less and less, particularly in urban central areas, the underground tunnel burial depth reaches 30 meters, and the trend that the underground tunnel buries deeper and deeper is obvious. The deep burying means that the construction is more difficult by the conventional mining method and more mechanized construction tunnels represented by the shield method are more and more faced with larger underground water pressure and more updated and more complicated geological conditions. In the existing GB50157-2013 subway design Specification, a connection channel is required to be arranged between two single-line interval tunnels in urban rail transit construction when the coherent length of the tunnels is more than 600m for fire evacuation. At present, branch tunnels such as communication channels and the like are excavated by a mining method generally, particularly in a soft soil stratum, a certain range of the periphery of the excavation needs to be reinforced by grouting or freezing and other methods, the conventional freezing method has the problems of long construction period, high risk, high construction cost and the like, all the construction parties basically maintain the attitude of not selecting the used amount, and the development of mechanical construction equipment and a mechanical construction method are always continuous pursuits of underground engineering workers, and the mechanical construction is also a necessary way for improving the labor intensity of the construction workers and promoting the society to carry out.
When the contact channel is constructed by a mechanical method, a mechanical pipe jacking method is mostly adopted, the pipe jacking construction is necessary to exist in a rear backrest system, and the existing rear backrest system mostly adopts a pushing mode to act the thrust to the rear of the backrest. However, by adopting the method in the tunnel, the stress and deformation of the shield tunnel structure and the excessive dislocation of the segment joints are easily caused, the safety of the shield tunnel structure is damaged, and the waterproof effect of the shield tunnel is reduced.
Disclosure of Invention
The invention aims to provide a connecting channel pipe jacking construction backrest system and a using method thereof, so as to solve the technical problems in the background technology.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
the utility model provides a linkage passageway push pipe construction back system, includes reinforcement mechanism, tractive hydro-cylinder, back mechanism and pressure control platform, reinforcement mechanism corresponds and sets up in the soil-backed side of originating entrance to a cave week side shield section of jurisdiction, and reinforcement mechanism will originate a plurality of shield sections of entrance to a cave week side and link into a whole, the tractive hydro-cylinder is provided with a plurality of roots, and a plurality of tractive hydro-cylinders use the central axis of originating entrance to a cave to lay on the reinforcement mechanism of originating entrance to a cave week side as the center equidistant, and the tractive hydro-cylinder level sets up, and its both ends are respectively through tractive support fixed mounting on reinforcement mechanism and back mechanism, back mechanism corresponds and sets up in one side that the originating entrance to a cave was kept away from to the shield tunnel, and its one side wall that is close to originating entrance to a cave links to as the back-supporting surface that impels the hydro-cylinder and the stiff end butt of propulsion cylinder, pressure control platform passes through the connecting line and links to each other with tractive hydro-cylinder and propulsion cylinder, the device is used for balancing the pressure of the traction oil cylinder and the pressure of the propulsion oil cylinder.
Preferably, the backrest mechanism comprises a steel backrest, a pushing oil cylinder and a supporting shoe, one side of the steel backrest is connected with the pulling oil cylinder through a pulling support fixed by welding, the other side of the steel backrest is connected with the supporting shoe through a plurality of pushing oil cylinders, one side of the supporting shoe, which is far away from the pushing oil cylinder, is set to be an arc surface matched with a shield segment at a corresponding position, and the pushing oil cylinder is connected with the pressure control console through a connecting pipeline for compensating a pressure difference value between the pulling oil cylinder and the pushing oil cylinder.
Preferably, the reinforcing mechanism comprises a reinforcing steel plate buried at the back soil side of the shield segment, a plurality of anchoring steel bars are welded at equal intervals at one side of the reinforcing steel plate buried in the shield segment concrete, the anchoring steel bars are poured in the concrete of the shield segment, the part of the shield segment in the range of the starting tunnel portal is not provided with a reinforcing steel plate, the reinforcing steel plates of a plurality of shield segments outside the starting tunnel portal are spliced by a through seam, and a plurality of longitudinal connecting rods and radial connecting rods which are fixed by welding form a whole, the longitudinal connecting rods are arranged in parallel to the central axis direction of the shield tunnel, the rod body is attached to the reinforced steel plate and traverses all vertical abutted seams of the reinforced steel plate, the radial connecting rod is arranged perpendicular to the direction of the central axis of the shield tunnel, the rod body is arc-shaped and is attached to the reinforced steel plate, and the rod body transversely penetrates all horizontal abutted seams of the reinforced steel plate.
Preferably, the drawing oil cylinder is a double-head hydraulic oil cylinder and comprises a cylinder body in the middle and piston rods at two ends.
Preferably, the traction support includes drawknot sleeve, traction rod and drawknot support, drawknot sleeve opening one end is fixed to be set up on strengthening mechanism or back mechanism, and equidistant being fixed with a plurality of drawknot floor between its barrel week side and strengthening mechanism or back mechanism, and the through-hole has been seted up at its bobbin base middle part, and wears to be equipped with the traction rod in the through-hole, the one end welded fastening that the traction rod extends to the drawknot sleeve inboard has the drawrod head of pie, and the size of drawrod head is greater than the size of drawknot sleeve bobbin base through-hole, and the one end welded fastening that the drawrod kept away from the drawknot sleeve has the drawknot support, the drawknot support is the U type, and its U type inslot interpolation is equipped with the piston rod head of traction cylinder, and its U type groove wall is located the top bottom both ends of piston rod head, and its U type groove wall is connected with the piston rod head through the round pin axle.
Preferably, four drawing oil cylinders are arranged, four drawing supports corresponding to one ends of the four drawing oil cylinders close to the starting hole are respectively arranged on four corner points of a rectangle on the outer side of the starting hole, and the center point of the rectangle is located on the central axis of the starting hole.
Preferably, four traction supports close to one side of the starting hole are vertically arranged into a group, a support upright post is erected between each group of traction supports, the support upright posts are vertically arranged, and the end parts of rod bodies of the support upright posts are connected with a connecting seat welded and fixed on the drawknot sleeve through pin shafts.
Preferably, two traction oil cylinders arranged above are provided with supporting inclined rods, one ends of the supporting inclined rods are connected with the hinged seats on the cylinder body through pin shafts, and the other ends of the supporting inclined rods are connected with the hinged seats on the supporting upright posts or the backrest mechanism through pin shafts.
Preferably, nine jacking oil cylinders are arranged on the steel backrest in a rectangular array, and the central axis of the jacking oil cylinder positioned in the center of the rectangular array is superposed with the central axis of the starting hole.
In addition, the invention also provides a using method of the connecting channel pipe-jacking construction backrest system, which comprises the following steps:
firstly, paving a track in a shield tunnel, installing a pipe jacking machine in place through a trolley, reinforcing shield segments on the periphery of a starting tunnel opening into a whole through a reinforcing mechanism, and installing a traction oil cylinder, a backrest mechanism, an oil cylinder bracket and a propulsion oil cylinder;
step two, placing a first pipe joint at the front end of a propulsion oil cylinder in a contraction state, starting a traction oil cylinder while starting the propulsion oil cylinder to jack the pipe joint, adjusting the pressure of the traction oil cylinder through a pressure control console to keep the pressure balance of the traction oil cylinder and the propulsion oil cylinder, contracting the propulsion oil cylinder and placing a second pipe joint after the propulsion stroke of the propulsion oil cylinder reaches the length of one pipe joint, jacking the second pipe joint and balancing the pressure of the traction oil cylinder and the propulsion oil cylinder, and repeating the operations of pushing the pipe joint, contracting the propulsion oil cylinder and placing the next pipe joint until the front end of a pipe jacking machine advances to the position of the soil back surface of the shield segment at the starting hole opening;
and step three, cutting the shield segment concrete by the push bench and enabling the shield segment concrete to enter the soil body, continuously and repeatedly pushing the pipe segment, contracting the pushing oil cylinder and placing the next pipe segment, when the pressure of the drawing oil cylinder is not enough to balance the pressure of the pushing oil cylinder, starting the pushing oil cylinder by the pressure control console to push the supporting shoe to the shield segment on one side opposite to the tunneling direction and attaching the supporting shoe to the shield segment, and adjusting the pressure of the pushing oil cylinder to enable the sum of the pressures of the drawing oil cylinder and the pushing oil cylinder to be kept balanced with the pressure of the pushing oil cylinder until the push pipe construction of the communication channel is completed.
Compared with the prior art, the invention has the beneficial effects that: the structure of the invention is novel and reasonable in design, the backrest system mainly based on traction replaces the backrest system which only depends on a pushing mode to apply thrust to the rear part of the backrest in the traditional mode, and a compensation mechanism assisting in pushing is further arranged, so that the organic combination of traction and pushing is realized, the tunnel segments are stressed dispersedly, the problems of stress and deformation of the shield tunnel structure and overlarge segment joint dislocation are solved, and the safety and the waterproofness of the shield tunnel structure are effectively ensured.
Drawings
The above and/or other aspects and advantages of the present invention will become more apparent and more readily appreciated from the detailed description taken in conjunction with the following drawings, which are meant to be illustrative, not limiting of the invention, and in which:
FIG. 1 is a schematic structural view of a connecting channel pipe jacking construction backrest system in a shield tunnel along the cross section of the shield tunnel;
FIG. 2 is a schematic structural diagram of a connecting channel pipe jacking construction backrest system related to the invention;
FIG. 3 is a schematic structural view of a reinforcement mechanism of a connecting channel pipe jacking construction backrest system in a shield tunnel along a longitudinal section of the shield tunnel;
FIG. 4 is a schematic structural view of a reinforcing steel plate and an anchoring steel bar of the connecting channel pipe jacking construction backrest system according to the present invention;
FIG. 5 is a schematic structural diagram of a first step of a usage method of the connecting channel pipe jacking construction backrest system according to the present invention;
FIG. 6 is a structural schematic diagram of a second step of the usage method of the connecting channel pipe jacking construction backrest system related by the invention;
FIG. 7 is a structural schematic diagram of a third step of a using method of the connecting channel pipe jacking construction backrest system related by the invention.
Reference numerals: 1-shield tunnel, 2-shield segment, 3-initial opening, 4-reinforcing mechanism, 401-reinforcing steel plate, 402-anchoring steel bar, 403-longitudinal connecting rod, 404-radial connecting rod, 5-pulling support, 501-pulling sleeve, 502-pulling ribbed plate, 503-pulling rod head, 504-pulling rod, 505-pulling support, 506-connecting seat, 507-supporting upright post, 6-pin shaft, 7-pulling oil cylinder, 701-cylinder body, 702-piston rod, 8-supporting diagonal rod, 9-hinging seat, 10-backrest mechanism, 1001-steel backrest, 1002-pushing oil cylinder, 1003-supporting shoe, 11-oil cylinder support, 12-pushing oil cylinder, 13-connecting pipeline, 14-pressure control console, 15-pipe pushing machine, 16-track, 17-trolley and 18-pipe joint.
Detailed Description
Hereinafter, embodiments of a connecting tunnel pipe jacking construction backrest system and a method of using the same according to the present invention will be described with reference to the accompanying drawings. The examples described herein are specific embodiments of the present invention, are intended to be illustrative and exemplary in nature, and are not to be construed as limiting the scope of the invention. In addition to the embodiments described herein, those skilled in the art will be able to employ other technical solutions which are obvious based on the disclosure of the claims and the specification of the present application, and these technical solutions include technical solutions which make any obvious replacement or modification for the embodiments described herein.
In the description of the present invention, it should be noted that the terms "top", "bottom", "upper", "lower", "inner", "outer", "transverse", "longitudinal", "vertical", "upright", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.
The drawings in the present specification are schematic views to assist in explaining the concept of the present invention, and schematically show the shapes of respective portions and their mutual relationships. It is noted that the drawings are not necessarily to the same scale so as to clearly illustrate the structures of the various elements of the embodiments of the invention. Like reference numerals are used to denote like parts.
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth to illustrate, but are not to be construed to limit the scope of the invention. Preferred embodiments of the present invention are described in further detail below with reference to FIGS. 1-7:
as shown in fig. 1-2, the preferable push pipe construction backrest system for the connecting tunnel of the invention comprises a reinforcing mechanism 4, a pulling oil cylinder 7, a backrest mechanism 10 and a pressure control console 14, as shown in fig. 3-4, the reinforcing mechanism 4 is correspondingly arranged on the back soil side of a shield segment 2 on the peripheral side of a starting tunnel portal 3, the reinforcing mechanism 4 connects a plurality of shield segments 2 on the peripheral side of the starting tunnel portal 3 into a whole, the reinforcing mechanism 4 comprises a reinforcing steel plate 401 with the thickness of 3cm embedded in the back soil side of the shield segment 2, a plurality of anchoring steel bars 402 with the diameter of 22mm are welded on one side of the reinforcing steel plate 401 embedded in the concrete of the shield segment 2 at equal intervals, the anchoring steel bars 402 are poured in the concrete of the shield segment 2 to prevent the reinforcing steel plate 401 from pulling out of the shield segment 2 after being pulled, the reinforcing steel plate 401 is not arranged on the part of the shield segment 2 within the range of the starting tunnel portal 3, reinforcing steel plates 401 of a plurality of shield segments 2 outside an originating opening 3 are assembled by means of through seams and form a whole by means of a plurality of longitudinal connecting rods 403 and radial connecting rods 404 which are fixedly welded, the longitudinal connecting rods 403 are arranged in parallel to the central axis direction of the shield tunnel 1, rod bodies of the longitudinal connecting rods 403 are attached to the reinforcing steel plates 401 and cross all vertical abutted seams of the reinforcing steel plates 401, the radial connecting rods 404 are arranged in a direction perpendicular to the central axis direction of the shield tunnel 1, are arc-shaped and are attached to the reinforcing steel plates 401, and the rod bodies of the radial connecting rods cross all horizontal abutted seams of the reinforcing steel plates 401;
four drawing oil cylinders 7 are arranged, the drawing oil cylinders 7 adopt double-head hydraulic oil cylinders, the four drawing oil cylinders 7 are arranged on the reinforcing mechanism 4 on the peripheral side of the starting opening 3 at equal intervals by taking the central axis of the starting opening 3 as the center, the drawing oil cylinders 7 are horizontally arranged, two ends of the drawing oil cylinders 7 are fixedly arranged on the reinforcing mechanism 4 and the backrest mechanism 10 through drawing supports 5 respectively, the four drawing supports 5 corresponding to one ends of the four drawing oil cylinders 7 close to the starting opening 3 are arranged on four corner points of a rectangle on the outer side of the starting opening 3 respectively, and the central point of the rectangle is positioned on the central axis of the starting opening 3;
the backrest mechanism 10 is correspondingly arranged on one side of the shield tunnel 1 far away from the starting tunnel portal 3, the wall surface of one side of the backrest mechanism, close to the starting tunnel portal 3, is used as a back-support surface of the propulsion oil cylinder 12 and is connected with the fixed end of the propulsion oil cylinder 12 in an abutting mode, the backrest mechanism 10 comprises a steel backrest 1001, a jacking oil cylinder 1002 and a supporting shoe 1003, the steel backrest 1001 is of a box-shaped structure and is made of 3cm steel plates, I-shaped steel with the model number of 250 is placed in the box-shaped structure at equal intervals to serve as reinforcing rib plates, one side of the steel backrest 1001 is connected with the traction oil cylinder 7 through a traction support 5 fixed in a welding mode, the other side of the steel backrest is connected with the supporting shoe 1003 through nine jacking oil cylinders 1002, one side of the supporting shoe, far away from the jacking oil cylinder 1002, is arranged into an arc surface matched with the shield segment 2 at the corresponding position, the nine jacking oil cylinders 1002 are arranged on the steel backrest 1001 according to a rectangular array, and the central axis of the jacking oil cylinder 1002 at the central position of the rectangular array coincides with the central axis of the starting tunnel portal 3, the pushing oil cylinder 1002 is connected with a pressure control platform 14 through a connecting pipeline 13 and is used for compensating a pressure difference value between the pulling oil cylinder 7 and the pushing oil cylinder 12;
the traction support 5 comprises a traction sleeve 501, a traction rod 504, a traction support 505 and a support upright 507, wherein one end of an opening of the traction sleeve 501 is fixedly arranged on a reinforced steel plate 401 or a steel backrest 1001, six traction rib plates 502 are fixed between the circumferential side of a cylinder body and the reinforced steel plate 401 or the steel backrest 1001 at equal intervals, a through hole is formed in the middle of the cylinder bottom, the traction rod 504 penetrates through the through hole, a cake-shaped traction rod head 503 is fixedly welded at one end of the traction rod 504 extending to the inner side of the traction sleeve 501, the size of the traction rod head 503 is larger than that of the through hole at the cylinder bottom of the traction sleeve 501, the traction support 505 is fixedly welded at one end of the traction rod 504 far away from the traction sleeve 501, the traction support 505 is U-shaped, a piston rod head 702 of a traction cylinder 7 is inserted in a U-shaped groove, the walls of the U-shaped groove are positioned at two ends of the top bottom of the piston rod head 702, and the U-shaped groove walls are connected with the piston rod head 702 through a pin 6, four traction supports 5 close to one side of the starting hole 3 are arranged in a group from top to bottom, a support upright 507 is erected between each group of traction supports 5, the support upright 507 is vertically arranged, the end part of a rod body of each support is connected with a connecting seat 506 on the drawknot sleeve 501 through a pin shaft 6, in order to improve the stability of the traction oil cylinders 7, two traction oil cylinders 7 arranged above the support upright 507 are provided with support inclined rods 8, one ends of the support inclined rods 8 are connected with a hinge seat 9 on the cylinder body 701 through pin shafts 6, and the other ends of the support inclined rods 8 are connected with the hinge seats 9 on the support upright 507 or the steel backrest 1001 through pin shafts 6;
the pressure control table 14 is internally provided with a PLC control computer and is provided with a display screen, the PLC control computer is respectively connected with each drawing oil cylinder 7, each pushing oil cylinder 1002 and each pushing oil cylinder 12 through a connecting pipeline 13, the display screen respectively displays the oil pressure, the oil temperature and the pulling force or the pushing force of each oil cylinder, the PLC control computer can balance the pressure of each pushing oil cylinder 12 and the pressure of each drawing oil cylinder 7, and if the pressure of each drawing oil cylinder 7 is not enough to balance the pressure of each pushing oil cylinder 12, the PLC control computer analyzes the pressure and increases the pressure of each pushing oil cylinder 1002 for compensation.
As shown in FIGS. 5-7, the invention also provides a use method of the connecting channel pipe-jacking construction backrest system, which comprises the following steps: firstly, a track 16 is laid in a shield tunnel 1, a pipe jacking machine 15 is installed in place through a trolley 17 (the trolley 17 is provided with a hydraulic system, a muck improvement system, a compressed air system, a transformer, a cooling water system, a hoisting system, a grease injection system, a grouting system, an operation chamber, a bentonite system and a pressure control table 14 required by pipe jacking construction), shield segments 2 on the periphery of a starting tunnel portal 3 are reinforced into a whole through a reinforcing mechanism 4, and a traction oil cylinder 7, a backrest mechanism 10, an oil cylinder support 11 and a propulsion oil cylinder 12 are installed;
step two, placing a first pipe joint 18 at the front end of a propulsion oil cylinder 12 in a contracted state, starting a traction oil cylinder 7 while starting the propulsion oil cylinder 12 to jack the pipe joint 18, adjusting the pressure of the traction oil cylinder 7 through a pressure control table 14 to keep the pressure balance of the traction oil cylinder 7 and the propulsion oil cylinder 12, contracting the propulsion oil cylinder 12 and placing a second pipe joint 18 after the propulsion stroke of the propulsion oil cylinder 12 reaches the length of one pipe joint 18, jacking the second pipe joint 18 and balancing the pressure of the traction oil cylinder 7 and the propulsion oil cylinder 12, and repeating the operations of the propulsion oil cylinder 18, the contraction propulsion oil cylinder 12 and the placement of the next pipe joint 18 until the front end of a pipe jacking machine 15 advances to the position of the soil back surface of a shield segment 2 at the position of a starting tunnel entrance 3;
thirdly, the pipe jacking machine 15 cuts the concrete of the shield segment 2 and enters the soil body (in order to prevent the normal operation of the pipe jacking machine 15 from being influenced by the internal reinforcing bars of the shield segment 2, the reinforcing bars in the shield segment 2 at the starting opening 3 are replaced by glass fiber reinforcing bars), the operations of pushing the pipe joints 18, contracting the pushing oil cylinder 12 and placing the next pipe joint 18 are continuously repeated, when the pressure of the pulling oil cylinder 7 is not enough to balance the pressure of the pushing oil cylinder 12, the pushing oil cylinder 1002 is started through the pressure control console 14 to push the supporting shoe 1003 into the shield segment 2 on one side in the opposite direction of the tunneling direction and be attached to the pipe jacking cylinder 2, and the pressure of the pushing oil cylinder 1002 is adjusted to keep the sum of the pressures of the pulling oil cylinder 7 and the pushing oil cylinder 1002 balanced with the pressure of the pushing oil cylinder 12 until the construction of the communication channel is completed.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The utility model provides a junctional passage push pipe construction back system which characterized in that: including strengthening mechanism (4), tractive hydro-cylinder (7), back mechanism (10) and pressure control platform (14), strengthening mechanism (4) correspond to set up in the soil backing side of originating entrance to a cave (3) week side shield section of jurisdiction (2), and strengthening mechanism (4) will be originated a plurality of shield sections of jurisdiction (2) of entrance to a cave (3) week side and link into a whole, tractive hydro-cylinder (7) are provided with a plurality of roots, and a plurality of tractive hydro-cylinders (7) use the central axis of originating entrance to a cave (3) to lay on the strengthening mechanism (4) of originating entrance to a cave (3) week side as center equidistant, tractive hydro-cylinder (7) level sets up, and its both ends are respectively through tractive support (5) fixed mounting on strengthening mechanism (4) and back mechanism (10), back mechanism (10) correspond to set up in one side of keeping away from originating entrance to shield tunnel (1), and one side wall face and propulsion hydro-cylinder (12) that it is close to originating entrance to a side wall face of entrance to a cave (3) as propulsion hydro-cylinder (12) are advanced with propulsion hydro-cylinder (14) and propulsion hydro-cylinder (10) are advanced (12) The fixed ends of the traction oil cylinder (7) and the propulsion oil cylinder (12) are connected through a connecting pipeline (13) and the pressure control platform (14) is used for balancing the pressure of the traction oil cylinder (7) and the propulsion oil cylinder (12).
2. The interconnected channel pipe jacking construction backrest system of claim 1, wherein: the device is characterized in that the backrest mechanism (10) comprises a steel backrest (1001), a pushing oil cylinder (1002) and a supporting shoe (1003), one side of the steel backrest (1001) is connected with the pulling oil cylinder (7) through a pulling support (5) fixed by welding, the other side of the steel backrest is connected with the supporting shoe (1003) through a plurality of pushing oil cylinders (1002), one side, far away from the pushing oil cylinder (1002), of the supporting shoe (1003) is set to be a shield segment (2) matched arc surface corresponding to the position, and the pushing oil cylinder (1002) is connected with a pressure control console (14) through a connecting pipeline (13) and used for compensating a pressure difference value between the pulling oil cylinder (7) and a propelling oil cylinder (12).
3. The interconnected channel pipe jacking construction backrest system of claim 1, wherein: the reinforcing mechanism (4) comprises a reinforcing steel plate (401) buried at the soil back side of the shield segment (2), a plurality of anchoring steel bars (402) are welded at equal intervals on one side of the reinforcing steel plate (401) buried in concrete of the shield segment (2), the anchoring steel bars (402) are poured in the concrete of the shield segment (2), the reinforcing steel plate (401) is not arranged on the part of the shield segment (2) positioned in the range of the originating portal (3), the reinforcing steel plates (401) of the plurality of shield segments (2) outside the originating portal (3) are assembled by through seams, a plurality of longitudinal connecting rods (403) and radial connecting rods (404) which are fixed by welding form a whole, the longitudinal connecting rods (403) are arranged in parallel to the direction of the central axis of the shield tunnel (1), and the rod bodies are adhered on the reinforcing steel plate (401) and cross all vertical seams of the reinforcing steel plate (401), the radial connecting rods (404) are perpendicular to the direction of the central axis of the shield tunnel (1), the rod bodies are arc-shaped and are attached to the reinforced steel plate (401), and the rod bodies transversely penetrate all horizontal abutted seams of the reinforced steel plate (401).
4. The interconnected channel pipe jacking construction backrest system of claim 1, wherein: the drawing oil cylinder (7) is a double-head hydraulic oil cylinder and comprises a cylinder body (701) in the middle and piston rods (702) at two ends.
5. The interconnected channel pipe jacking construction backrest system of claim 4, wherein: the traction support (5) comprises a traction sleeve (501), a traction rod (504) and a traction support (505), one end of an opening of the traction sleeve (501) is fixedly arranged on the reinforcing mechanism (4) or the backrest mechanism (10), a plurality of traction ribbed plates (502) are fixedly arranged between the circumferential side of a cylinder body and the reinforcing mechanism (4) or the backrest mechanism (10) at equal intervals, a through hole is formed in the middle of the cylinder bottom of the traction sleeve, the traction rod (504) penetrates through the through hole, a cake-shaped traction rod head (503) is fixedly welded at one end, extending to the inner side of the traction sleeve (501), of the traction rod (504), the size of the traction rod head (503) is larger than that of the through hole in the cylinder bottom of the traction sleeve (501), the traction support (505) is fixedly welded at one end, far away from the traction sleeve (501), of the traction support (505) is U-shaped, a piston rod (702) of the traction oil cylinder (7) is inserted in a U-shaped groove, the walls of the U-shaped groove are positioned at the top and bottom ends of the rod head of the piston rod (702), and the walls of the U-shaped groove are connected with the rod head of the piston rod (702) through a pin shaft (6).
6. The interconnected channel pipe jacking construction backrest system of claim 5, wherein: four drawing oil cylinders (7) are arranged, four drawing supports (5) corresponding to one ends of the four drawing oil cylinders (7) close to the starting hole (3) are respectively arranged on four corner points of a rectangle on the outer side of the starting hole (3), and the center point of the rectangle is located on the central axis of the starting hole (3).
7. The interconnected channel pipe jacking construction backrest system of claim 6, wherein: four traction supports (5) close to one side of the starting hole (3) are vertically arranged into a group, a support upright post (507) is erected between each group of traction supports (5), the support upright post (507) is vertically arranged, and the end part of a rod body of the support upright post is connected with a connecting seat (506) on the drawknot sleeve (501) through a pin shaft (6).
8. The interconnected channel pipe jacking construction backrest system of claim 6, wherein: two traction oil cylinders (7) arranged above are provided with supporting inclined rods (8), one ends of the supporting inclined rods (8) are connected with hinged seats (9) on the cylinder body (701) through pin shafts (6), and the other ends of the supporting inclined rods (8) are connected with hinged seats (9) on supporting upright columns (507) or backrest mechanisms (10) through pin shafts (6).
9. The interconnected channel pipe jacking construction backrest system of claim 2, wherein: nine jacking oil cylinders (1002) are arranged, the nine jacking oil cylinders (1002) are arranged on the steel backrest (1001) according to a rectangular array, and the central axis of the jacking oil cylinder (1002) positioned at the central position of the rectangular array is superposed with the central axis of the starting hole (3).
10. A use method of the connecting channel pipe-jacking construction backrest system is used in the construction process of the connecting channel pipe-jacking construction backrest system according to claim 2, and is characterized by comprising the following steps:
firstly, a track (16) is laid in a shield tunnel (1), a pipe jacking machine (15) is installed in place through a trolley (17), shield pipe pieces (2) on the periphery of a starting tunnel opening (3) are reinforced into a whole through a reinforcing mechanism (4), and a traction oil cylinder (7), a backrest mechanism (10), an oil cylinder support (11) and a propulsion oil cylinder (12) are installed;
secondly, placing a first pipe joint (18) at the front end of a propulsion oil cylinder (12) in a contraction state, starting a traction oil cylinder (7) while the propulsion oil cylinder (12) is jacked into the pipe joint (18), adjusting the pressure of the traction oil cylinder (7) through a pressure control console (14) to keep the pressure balance of the traction oil cylinder (7) and the propulsion oil cylinder (12), when the propulsion stroke of the propulsion oil cylinder (12) reaches the length of one pipe joint (18), contracting the propulsion oil cylinder (12) and placing a second pipe joint (18), jacking the second pipe joint (18) and balancing the pressure of the traction oil cylinder (7) and the propulsion oil cylinder (12), and repeating the operations of propelling the pipe joint (18), contracting the propulsion oil cylinder (12) and placing the next pipe joint (18) until the front end of a pipe jacking machine (15) advances to the position of the back soil surface of a shield segment (2) at the starting tunnel portal (3);
and step three, cutting the concrete of the shield segment (2) by the push bench (15) and putting the concrete into the soil body, continuously repeating the operations of pushing the pipe joint (18), retracting the pushing cylinder (12) and placing the next pipe joint (18), when the pressure of the pulling cylinder (7) is not enough to balance the pressure of the pushing cylinder (12), starting the pushing cylinder (1002) through the pressure control console (14) to push the supporting shoe (1003) and attach the supporting shoe to the shield segment (2) on one side in the opposite direction of the tunneling direction, and adjusting the pressure of the pushing cylinder (1002) to keep the sum of the pressures of the pulling cylinder (7) and the pushing cylinder (1002) and the pressure of the pushing cylinder (12) balanced until the push pipe construction of the communication channel is completed.
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| CN115110973B (en) | 2022-12-20 |
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