Construction method for laying steel pipes in shield tunnel in penetrating mode

Abstract

The invention provides a construction method for laying a steel pipe in a shield tunnel in a penetrating mode. The construction method comprises the steps that the penetrating steel pipe is divided into a plurality of steel pipe sections according to a preset principle; the well positions at the two ends arranged in the shield tunnel interval tunneling process are alternately used as steel pipe penetrating laying construction wells, and the steel pipe sections are subjected to filling consolidation construction while being laid from the middle of the tunnel to the well positions at the two ends till all the steel pipe sections penetrate through the whole shield tunnel as required to be completely laid in place. The tunnel hole constructed based on the construction method is coaxial with the steel pipe, gaps with large filling flow state solidified soil volume are reserved around the tunnel hole, it is not needed that a permanent pipe bracket or a supporting rail needs to be arranged at the bottom in advance like the construction of laying the whole steel pipe in a penetrating mode, and in order to guarantee the filling quality of the flow state solidified soil, the inner wall of the steel pipe needs to be filled with the flow state solidified soil at intervals. And a plurality of joint valves filled with the flow-state solidified soil are arranged on the periphery, construction is convenient, and the filling and solidifying effect of the steel pipe can be better guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of urban integrated pipe corridors, and in particular to a construction method for laying steel pipes through a shield tunnel. Background Art

[0002] Urban integrated pipe gallery is a construction method widely used in China in recent years to optimize the layout of urban municipal pipelines. In order to meet the development needs of the city, ensure and improve the safety of raw water, and optimize the water supply system in the central urban area, the layout of urban integrated pipe gallery is adopted. The shield tunnel is arranged concentrically with the steel pipe, and the gap in the middle is filled with fluidized solidified soil with required indicators such as strength, performance, and physical parameters. After the entire steel pipe is pushed through, the gap filling construction method between the pipes is carried out. The pre-installed permanent pipe support or support rail is carried out in the tunnel. During filling, people are inside the steel pipe, and there is a large operating space; the jacking and pushing pipe is mainly operated in a wide working well.

[0003] Therefore, how to carry out the construction of laying steel pipes through shield tunnels in a simple, safe and reliable manner is a technical problem that technical personnel in this field urgently need to solve. Summary of the invention

[0004] The purpose of the present invention is to provide a construction method for laying steel pipes through a shield tunnel, which can be easily operated, safely and reliably carried out in a specific space environment.

[0005] In order to solve the above technical problems, the present invention provides a construction method for laying steel pipes through a shield tunnel, and the construction method for laying steel pipes through a shield tunnel comprises the following steps:

[0006] S100, dividing the through-through steel pipe into a plurality of steel pipe sections according to preset principles; wherein the preset principles include: the strength of the steel pipe section, the operation cost, and the range of the longitudinal hand holes of the shield segment that can be covered by the steel pipe section;

[0007] S200. Alternately use the two end wells arranged during the shield tunnel section excavation process as steel pipe crossing and laying construction wells, and lay and fill the steel pipe sections from the middle of the tunnel to the two end wells while consolidating them, until all steel pipe sections are laid in place throughout the entire shield tunnel as required; the laying and filling consolidation construction of each steel pipe section includes: sequentially pushing and transporting in the shield tunnel, positioning at designated positions, welding inside the pipe, and filling and consolidating with fluidized solidified soil.

[0008] Optionally, in the construction method for laying steel pipes through a shield tunnel, step S200 includes the following steps:

[0009] The first section of steel pipe is put into the shield tunnel from the first end well, and the filling and consolidation construction is carried out at the predetermined position in the middle of the tunnel;

[0010] With the consolidated first section of steel pipe as the center, the first well and the second well arranged at both ends of the shield tunnel section are alternately used as the construction wells for the second section of steel pipe to pass through and lay, and the second section of steel pipe is laid and filled and consolidated at the same time.

[0011] Optionally, in the construction method for laying steel pipes through a shield tunnel, when laying the first section of the steel pipe through, the following steps are included:

[0012] S11. Two pairs of steel pipe supporting brackets are welded and fixed to the front end and rear end bottom of the first steel pipe section respectively. Two barge trucks support the front end and rear end of the first steel pipe section based on an I-beam shoulder beam respectively, and barge the first steel pipe section to the predetermined position in the middle of the tunnel;

[0013] S12. On both sides of each barge, a temporary support assembly and a corbel support rod assembly are fixed respectively by using the longitudinal hand holes of the shield tunnel segments;

[0014] S13, using the cylinder jacks in the two temporary support assemblies to respectively lift the I-beam shoulder beams supporting the front and rear ends of the first steel pipe section, so that the first steel pipe section can be separated from the two lightering vehicles;

[0015] S14. Adjust the lifting height of the oil cylinder jack so that the first section of the steel pipe is lowered to the crossing consolidation design elevation;

[0016] S15, replace the steel pipe support bracket that supports the first steel pipe section that has been lowered to the consolidation design elevation based on the bracket support rod assembly;

[0017] S16. Install a foam concrete annular formwork between the outer wall of the front and rear ends of the first steel pipe section and the annular gap between the shield tunnel, and fill the space enclosed by the two foam concrete annular formworks with fluidized solidified soil to consolidate the first steel pipe section.

[0018] Optionally, in the construction method for laying a steel pipe through a shield tunnel, when laying a secondary steel pipe section through, the secondary steel pipe section is not the first steel pipe section, and the following steps are included:

[0019] S21. Only one pair of steel pipe supporting brackets is welded and fixed to the bottom of the rear end of the secondary steel pipe section. Two transfer vehicles support the front and rear ends of the secondary steel pipe section based on a pipe supporting short beam and an I-beam shoulder beam respectively, and transfer the secondary steel pipe section to the construction area of ​​the secondary steel pipe section adjacent to the consolidated steel pipe section;

[0020] S22. On both sides of each barge, a temporary support assembly is fixed by using the longitudinal hand hole of the shield tunnel segment; on both sides of the predetermined position in front of the barge at the rear end of the secondary steel pipe section, a bracket support rod assembly is fixed by using the longitudinal hand hole of the shield tunnel segment;

[0021] S23, using the cylinder jacks in the two temporary support assemblies to respectively lift the pipe support short beam at the front end and the I-beam shoulder beam at the rear end of the secondary steel pipe section, so that the secondary steel pipe section can be separated from the two lighters, and the front end of the secondary steel pipe section is placed on the steel pipe support bracket extending outward from the rear end of the adjacent consolidated steel pipe section, and the rear end of the secondary steel pipe section and the I-beam shoulder beam thereunder are placed on the slide rail on the jack base at the bottom of the rear end of the secondary steel pipe section, one end of the slide rail is placed on the jack base at the bottom of the rear end of the secondary steel pipe section, and the other end is placed on the placement platform of the bracket support rod assembly at the bottom of the secondary steel pipe section;

[0022] S24, remove the pipe support short beam and temporary support assembly located at the front end bottom of the second steel pipe section;

[0023] S25, push the tail end of the secondary steel pipe section horizontally, and push the secondary steel pipe section along the slide rail to the extended projection surface of the steel pipe support bracket at the bottom of the rear end of the consolidated steel pipe section, so that the front end port of the secondary steel pipe section is docked with the rear end port of the consolidated steel pipe section, and the steel pipe support bracket at the bottom of the rear end of the secondary steel pipe section is supported and docked with the bracket support rod assembly at the bottom of the secondary steel pipe section;

[0024] S26, welding the end faces of the secondary steel pipe section and the consolidated steel pipe section;

[0025] S27. A foam concrete annular template is installed between the outer wall of the rear end of the secondary steel pipe section and the annular gap between the shield tunnel, and the closed space formed by the solidified foam concrete filling end face of the previously positioned and consolidated steel pipe section is filled with fluidized solidified soil to consolidate the secondary steel pipe section.

[0026] Optionally, in the construction method for laying steel pipes through a shield tunnel, in S16 and S27, the process of installing a foam concrete annular formwork filled between the outer wall of the first steel pipe section and the second steel pipe section and the annular gap between the shield tunnel includes:

[0027] First, a ring body filled with foam concrete ring template is manufactured according to the size of the ring gap, and a hollow sealing rubber strip is assembled on the outer circumference of the ring body; wherein the inner diameter of the ring body is greater than or equal to the outer diameter of the steel pipe, and its outer diameter is smaller than the inner diameter of the shield tunnel;

[0028] Installing a foam concrete-filled annular formwork in the annular gap;

[0029] The cavity of the hollow sealing rubber strip filled with the foam concrete annular formwork is inflated with air or grease to expand the hollow sealing rubber strip, so that the annular body is fitted and sealed with the inner wall of the shield tunnel segment.

[0030] Optionally, in the construction method for laying steel pipes through a shield tunnel, in S200, during the construction of laying and filling each steel pipe section for consolidation:

[0031] The steel pipe sections are pushed to their respective construction areas in sequence using barges and jacks.

[0032] Optionally, in the construction method for laying steel pipes through a shield tunnel, in S200, during the construction of laying and filling each steel pipe section for consolidation:

[0033] Based on the pipe support short beam, I-beam shoulder beam, steel pipe support bracket, temporary support assembly, bracket support rod assembly and slide rail, the steel pipe section is pushed to the designated position for positioning;

[0034] The short pipe support beam is used to temporarily support one end of the steel pipe section that is not welded to the steel pipe support bracket;

[0035] The steel pipe supporting bracket is symmetrically welded to the bottom of at least one end of a steel pipe section to support the steel pipe section;

[0036] The temporary support assembly includes: a jack base and a cylinder jack detachably arranged on the jack base; the jack base is detachably installed in the longitudinal hand hole of the shield tunnel segment at the corresponding position during the laying process of each steel pipe section, so that the top rod of the cylinder jack is perpendicular to the axis of the shield tunnel; the I-beam shoulder beam at the bottom of the steel pipe section transported by the lighter is temporarily supported by the cylinder jack, so that the steel pipe section is separated from the lighter;

[0037] The bracket support rod assembly is butt-jointed with the steel pipe support bracket at the bottom of the steel pipe section, and is used to replace the steel pipe section that is lowered to the consolidation design elevation by the cylinder jack;

[0038] The slide rail is used to be temporarily set up in the predetermined construction area of ​​the secondary steel pipe section except the first steel pipe section, between the placing platform of the corbel support rod assembly and the jack base.

[0039] Optionally, in the construction method for laying steel pipes through a shield tunnel, the steel pipe support bracket includes a first body, a first end of the first body is an arc surface adapted to the curvature of the outer wall of the steel pipe, and a second end opposite to the first end is a plane, so that the steel pipe section can be stably placed under the support of the two steel pipe support brackets;

[0040] The jack base comprises: a second body, a mounting groove opened at the top of the second body, and a connecting component arranged at the bottom of the second body; the bottom of the second body is an arc surface adapted to the arc of the shield tunnel segment, and the connecting component is fixed in the longitudinal hand hole of the shield tunnel segment with bolts, and when the bottom of the second body is fitted with the shield tunnel segment, the opening direction of the mounting groove is vertically upward, so that the top rod of the oil cylinder jack installed in the mounting groove is perpendicular to the axis of the shield tunnel;

[0041] The corbel support rod assembly includes: a sliding shoe, a sliding rod which is placed in the sliding shoe and can slide relative to the sliding shoe, a wedge which can pass through the overlapping window of the sliding shoe and the sliding rod, a base arranged at the bottom of the sliding shoe, a connecting component arranged at the bottom of the base, and a placing platform arranged on one side of the base; wherein, the bottom of the base is an arc surface adapted to the curvature of the shield tunnel segment, the connecting component is fixed in the longitudinal hand hole of the shield tunnel segment with bolts, and the bottom of the base is fitted with the shield tunnel segment while the opening direction of the sliding shoe is vertically upward, so that the sliding rod placed in the sliding shoe is perpendicular to the axis of the shield tunnel.

[0042] Optionally, in the construction method for laying steel pipes through a shield tunnel, in S200, during the construction of laying and filling each steel pipe section for consolidation:

[0043] Based on installing a filled foam concrete annular formwork respectively between the outer wall of the front end and the rear end of the steel pipe section and the annular gap between the shield tunnel, the fluidized solidified soil is filled in the space enclosed by the two filled foam concrete annular formworks to consolidate the steel pipe section; wherein the filled foam concrete annular formwork comprises: an annular body and a hollow sealing rubber strip assembled on the outer circumference of the annular body; wherein the inner diameter of the annular body is greater than or equal to the outer diameter of the steel pipe, and its outer diameter is smaller than the inner diameter of the shield tunnel; wherein the annular body comprises several sub-bodies, and the sub-bodies are spliced ​​into an annular body in pairs based on bolts; wherein the outer circumference of each sub-body is formed with a notch and an end face pressure plate for fitting the circular hollow sealing rubber strip.

[0044] In the construction method for laying steel pipes through a shield tunnel provided by the present invention, the construction method divides the steel pipes that are passed through into several steel pipe sections according to preset principles; wherein the preset principles include: the strength of the steel pipe section body, the operating cost, and the range of the longitudinal hand holes of the shield segments that can be covered by the steel pipe sections; the two end wells arranged during the shield tunnel section excavation process are alternately used as steel pipe crossing laying construction wells, and the steel pipe sections are laid and filled and consolidated from the middle of the tunnel to the two end wells until all the steel pipe sections are laid in place through the entire shield tunnel as required; wherein the laying and filling and consolidation construction of each steel pipe section includes: pushing and transporting in the shield tunnel, positioning at a designated position, welding inside the pipe, and filling and consolidating with fluidized solidified soil in sequence. Based on dividing a whole steel pipe into several sections, the two end wells arranged during the shield tunnel section excavation process are used alternately as steel pipe crossing and laying construction wells, and each section of the steel pipe is laid and filled and consolidated. Compared with directly laying a whole steel pipe through and through, the construction of steel pipe sections one by one has a larger construction space, is convenient for construction, and can better ensure the filling and consolidation effect of the steel pipe. The entire construction process is simple to operate, and the construction of laying steel pipes through the shield tunnel is carried out safely and reliably.

[0045] On the other hand, based on the construction components designed and constructed specifically for the working space in the shield tunnel, each component in the construction component (temporary support component, corbel support rod component, jack base, and foam concrete-filled ring formwork) is safe, reliable, compact and light. Each part can be easily carried and operated by manpower in the gap space between the tunnel and the steel pipe. The operation is simple, safe and reliable, and it effectively meets the construction needs of laying steel pipes through the shield tunnel.

[0046] Among them, the temporary lifting structure is designed according to local conditions. Through the design of the jack base structure, the jack base can be detached and installed in the longitudinal hand hole of the shield tunnel segment at the corresponding position, so as to achieve stable fixation of the jack base and ensure that the top rod of the cylinder jack assembled on it is perpendicular to the axis of the shield tunnel (pushing direction). The temporary support assembly is used to lift the steel pipe section, which is simple to operate and compact in structure, making it convenient for workers to carry and move positions.

[0047] Among them, a stable support structure is designed according to local conditions. Through the structural design of the corbel support rod assembly, it has the function of fine-tuning the height. At the same time, the base can be detachably installed in the longitudinal hand hole of the shield tunnel segment at the corresponding position, so as to achieve stable fixation of the base and ensure that the corbel support rod assembly is vertical to the axis of the shield tunnel for fine-tuning and support. The corbel support rod assembly can stably replace the steel pipe section that is lowered to the consolidation design elevation by the cylinder jack. It has a compact structure and can be assembled on site. It is easy to operate and convenient for workers to carry and move.

[0048] Among them, in order to solve the problem of closing the annular gap between the steel pipe section and the shield tunnel due to the need to fill fluidized solidified soil, a modularly assembled foamed concrete annular formwork was customized to adapt to the size of the annular gap while ensuring its sealing effect and the consolidation effect of the filled fluidized solidified soil. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] The above and other objects, features and advantages of the present disclosure will become more apparent through a more detailed description of exemplary embodiments of the present disclosure in conjunction with the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present disclosure.

[0050] Figure 1 It is an elevation view of the process of laying pipe sections in a shield tunnel and extending them in a well in one embodiment of the present invention;

[0051] Figure 2 It is an elevation view of the transportation of steel pipe sections in a shield tunnel according to one embodiment of the present invention;

[0052] Figure 3 It is a schematic diagram after executing S13 in the construction method for laying steel pipes through a shield tunnel of the present invention;

[0053] Figure 4 It is a schematic diagram after executing S16 in the construction method for laying steel pipes through a shield tunnel of the present invention;

[0054] Figure 5 It is a schematic diagram of the second section of steel pipe being transported into place in the construction method for laying steel pipes through a shield tunnel of the present invention;

[0055] Figure 6 It is a schematic diagram of the construction method for laying steel pipes through a shield tunnel of the present invention, when the second section of the steel pipe is located on a steel pipe supporting bracket extending outward from the rear end of the adjacent first section of the steel pipe that has been consolidated;

[0056] Figure 7 It is a schematic diagram of the construction method of laying steel pipes through a shield tunnel of the present invention, when the ends of the first steel pipe section and the second steel pipe section are closed and connected;

[0057] Figure 8 It is a schematic diagram of the construction of each steel pipe section after the second steel pipe section in the construction method of laying steel pipes through a shield tunnel of the present invention;

[0058] Fig. 9 It is a structural schematic diagram of the use of a corbel support rod assembly and a steel pipe support corbel at the bottom of a steel pipe section when they are butted together for support in a construction method for laying steel pipes through a shield tunnel;

[0059] Fig.10 yes Fig. 9 Schematic diagram of the structure along the A direction;

[0060] Fig.11 This is a schematic diagram of the flattening of the foamed concrete-filled annular formwork used in the construction method of laying steel pipes through a shield tunnel;

[0061] Fig.12 It is a schematic diagram of the temporary support assembly and the bracket support rod assembly used in the construction method of laying steel pipes through the shield tunnel when lifting, placing and fixing the steel pipe section;

[0062] Fig.13 It is a flow chart of a construction method for laying steel pipes through a shield tunnel in one embodiment of the present invention;

[0063] Fig.14 It is a flow chart of laying the first section of steel pipe in a construction method for laying steel pipe in a shield tunnel in one embodiment of the present invention;

[0064] Fig.15 It is a flow chart of laying a secondary steel pipe section in a construction method for laying a steel pipe in a shield tunnel in one embodiment of the present invention.

[0065] In the figure:

[0066] 1-Steel pipe support corbel;

[0067] 2-Lighter;

[0068] 3-temporary support assembly; 31-jack base; 311-second body; 312-connecting component; 32-cylinder jack;

[0069] 4-corbel support rod assembly; 41-slide shoe; 42-slide rod; 43-window; 44-wedge iron; 45-base; 46-shelf platform; 47-connecting component;

[0070] 5-filled foam concrete annular formwork; 51-annular body; 52-hollow sealing rubber strip;

[0071] 6- Slide rail;

[0072] 7-Steel pipe section;

[0073] 8- shield tunnel segments;

[0074] 9- pipe support short beam;

[0075] 10-I-beam shoulder pole beam. DETAILED DESCRIPTION

[0076] The following is a further detailed description of the construction method for laying steel pipes through a shield tunnel proposed by the present invention in combination with the accompanying drawings and specific embodiments. The advantages and features of the present invention will become clearer according to the following description and claims. It should be noted that the accompanying drawings are in a very simplified form and are not in precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0077] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0078] In the description of the invention, it is necessary to understand that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the invention.

[0079] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0080] In the invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the invention can be understood according to the specific circumstances.

[0081] Please refer to Figures 1 to 15 The construction method for laying steel pipes through a shield tunnel comprises the following steps:

[0082] First, please refer to Figure 1 and Figure 2 , execute step S100, divide the through-through steel pipe into several steel pipe sections 7 according to preset principles; wherein the preset principles include: the strength of the steel pipe section 7, the operating cost, and the range of the longitudinal hand hole of the shield segment that can be covered by the steel pipe section.

[0083] Next, please refer to Figure 2 and Figure 8 , execute step S200, alternately use the two end wells arranged during the shield tunnel section excavation process as steel pipe crossing and laying construction wells, and lay and fill the steel pipe sections 7 from the middle of the tunnel to the two end wells while performing consolidation construction until all sections of the steel pipe sections 7 are laid in place throughout the entire shield tunnel as required; wherein, the laying and filling consolidation construction of each section of the steel pipe section 7 includes: sequentially pushing and transporting in the shield tunnel, positioning at a designated position, welding in the pipe, and filling and consolidating with fluidized solidified soil.

[0084] Specifically, the construction of each steel pipe section 7 while filling and consolidating includes: sequentially pushing and transporting in the shield tunnel, positioning at the designated position, welding inside the pipe, and filling and consolidating with fluidized solidified soil. The construction tools used in each process are as follows:

[0085] Forecast: Please refer to Figure 1 and Figure 2 Based on the barge 2 and the jack (including the cylinder jack 32 in the temporary support assembly 3 and the cylinder jack 32 vertically arranged on the side walls of the first well and the second well, as Figure 1 and Figure 2 As shown), the steel pipe sections 7 are pushed and transported to their respective construction areas in sequence.

[0086] Specified location positioning: Please refer to Fig. 9 , Fig.10 and Fig.12 , based on the pipe support short beam 9, the I-beam shoulder beam 10, the steel pipe support bracket 1, the temporary support assembly 3, the bracket support rod assembly 4 and the slide rail 6, the steel pipe section 7 is pushed to the designated position for positioning; wherein, the pipe support short beam 9 is used to temporarily support one end of the steel pipe section 7 that is not welded and fixed with the steel pipe support bracket 1; the steel pipe support bracket 1 is symmetrically welded to the bottom of at least one end of a steel pipe section 7 to support the steel pipe section 7; the temporary support assembly 3 includes: a jack base 31 and a cylinder jack 32 detachably arranged on the jack base 31; the jack base 31 is detachably installed on the corresponding position during the laying process of each section of the steel pipe section The longitudinal hand hole of the shield tunnel segment 8 is placed so that the top rod of the cylinder jack 32 is perpendicular to the axis of the shield tunnel; the I-beam shoulder beam 10 at the bottom of the steel pipe section 7 transported by the barge 2 is temporarily supported by the cylinder jack 32, so that the steel pipe section 7 is separated from the barge 2; the corbel support rod assembly 4 is docked with the steel pipe support corbel 1 at the bottom of the steel pipe section 7, and is used to replace the support of the steel pipe section 7 that is lowered to the consolidation design elevation by the cylinder jack 32; the slide rail 6 is used to be temporarily set up in the predetermined construction area of ​​the secondary steel pipe section other than the first steel pipe section, between the shelf platform 46 of the corbel support rod assembly 4 and the jack base 31.

[0087] The specific structures of the steel pipe supporting bracket 1, the jack base 31 and the bracket supporting rod assembly 4 are as follows:

[0088] Wherein, the steel pipe support corbel 1 comprises a first body, the first end of the first body is an arc surface adapted to the curvature of the outer wall of the steel pipe, and the second end opposite to the first end is a plane, so that the steel pipe section can be placed stably under the support of the two steel pipe support corbels 1. The function of the steel pipe support corbel 1 is to provide support and fixation for the current section of the steel pipe section 7, and also to provide support for the seating and positioning of the subsequent section of the steel pipe section 7. Specifically, the steel pipe support corbel 1 is arranged at a position where the angle between the two sides of the bottom of the steel pipe and the steel pipe wall is about 60° (1 / 6 of the arc length of the pipe diameter). The arrangement of the steel pipe support corbel 1 close to the ground not only makes the transportation and installation of the steel pipe section 7 stable, but also its structure is light and simple, which is convenient for lifting, positioning and fixing the steel pipe section 7.

[0089] The jack base 31 includes: a second body 311, a mounting groove opened at the top of the second body 311, and a connecting component 312 arranged at the bottom of the second body 311; the bottom of the second body 311 is an arc surface adapted to the arc of the shield tunnel segment 8, and the connecting component 312 is fixed in the longitudinal hand hole of the shield tunnel segment 8 with bolts, and the bottom of the second body 311 is fitted with the shield tunnel segment 8, and the opening direction of the mounting groove is vertically upward, so that the top rod of the oil cylinder jack 32 installed in the mounting groove is perpendicular to the axis of the shield tunnel. The jack base 31 is designed according to local conditions. Through the design of the structure of the jack base 31, the jack base 31 can be detachably installed in the longitudinal hand hole of the shield tunnel segment 8 at the corresponding position, so that the jack base 31 is stably fixed, and the top rod of the oil cylinder jack 32 assembled thereon is ensured to be perpendicular to the axis of the shield tunnel (pushing direction). The temporary support assembly 3 is used to lift the steel pipe section 7, which is simple to operate and has a compact structure, making it convenient for workers to carry and move the steel pipe section 7.

[0090] The corbel support rod assembly 4 comprises: a sliding shoe 41, a sliding rod 42 which is sleeved in the sliding shoe 41 and can slide relative to the sliding shoe 41, a wedge 44 which can pass through the overlapping window 43 of the sliding shoe 41 and the sliding rod 42, a base 45 arranged at the bottom of the sliding shoe 41, a connecting component 47 arranged at the bottom of the base 45, and a placing platform 46 arranged on one side of the base 45; wherein, the wedge 44 limits the height of the final corbel support rod assembly 4 after fine adjustment based on the window 43 which passes through the overlapping window 43 of the sliding shoe 41 and the sliding rod 42; the bottom of the base 45 is an arc surface adapted to the arc of the shield tunnel segment 8, and the connecting component 47 is fixed in the longitudinal hand hole of the shield tunnel segment 8 with bolts, and the bottom of the base 45 is fitted with the shield tunnel segment 8, while the opening direction of the sliding shoe 41 is vertically upward, so that the sliding rod 42 sleeved in the sliding shoe 41 is perpendicular to the axis of the shield tunnel. The corbel support rod assembly 4 can stably replace the support of the steel pipe section 7 that is lowered to the consolidation design elevation by the cylinder jack 32 (at this time, the axis of the steel pipe section 7 coincides with the axis of the tunnel). It has a compact structure and can be assembled on site. It is easy to operate and convenient for staff to carry and move.

[0091] Preferably, the length of the steel pipe section 7 matches the spacing modulus of the longitudinal hand holes of the tunnel shield segment, so that when the steel pipe section 7 is transported to the specified laying position, the projection surface of the steel pipe support corbel 1 welded at the bottom of the steel pipe section 7 just covers the longitudinal hand holes of the shield segment, so that the base 45 of the corbel support rod assembly 4 can be positioned and fixed using the longitudinal hand holes. The original function of the longitudinal hand holes of the tunnel shield segment is to facilitate the repair or replacement of defects, damage or loose installation of the segments during the tunnel construction process of the shield machine; and to perform ventilation and grouting operations after the segments are arranged. The fixed installation of the construction components of the present invention utilizes the longitudinal hand holes on the tunnel segments according to local conditions, supports the positioning and fixation of the construction components (temporary support components 3 and corbel support rod components 4), and ensures construction safety.

[0092] Filling fluidized soil consolidation: please refer to Fig.11 , based on installing a filled foam concrete annular formwork 5 between the outer wall of the front end and the rear end of the steel pipe section 7 and the annular gap between the shield tunnel, the space enclosed by the two filled foam concrete annular formworks 5 is filled with fluidized solidified soil to consolidate the steel pipe section 7; wherein the filled foam concrete annular formwork 5 comprises: an annular body 51 and a hollow sealing rubber strip 52 assembled on the outer circumference of the annular body 51; wherein the inner diameter of the annular body 51 is greater than or equal to the outer diameter of the steel pipe, and its outer diameter is smaller than the inner diameter of the shield tunnel; wherein the annular body 51 comprises several sub-bodies, and the sub-bodies are spliced ​​into the annular body 51 in pairs based on bolts; wherein the outer circumference of each sub-body is formed with a notch and an end face pressure plate for fitting the circular hollow sealing rubber strip 52.

[0093] Preferably, Fig.11 As shown, the annular body 51 in this embodiment is made of eight sub-bodies, the quality of each sub-body is controlled within the range of human movement, and they are spliced ​​into an annular body 51 in pairs by bolts, and finally the end to end are connected to form a ring; when installing, the annular body 51 is first hung on the outside of the port of the steel pipe section 7. Because the inner diameter of the annular body 51 is ≥ the outer diameter of the steel pipe, the bolts are tightened and the annular body 51 clamps the steel pipe. Considering the shield construction, when the segments are assembled, due to the uneven factors of soil ballast and deadweight, the tunnel cross-section is generally elliptical. The outer diameter of the annular body 51 must be smaller to facilitate on-site assembly. The remaining gap between the annular body 51 and the tunnel segments is sealed with a hollow sealing rubber strip 52.

[0094] In summary, the present invention is safe and reliable in each process and is compact and light. Each part can be easily carried and operated by manpower in the gap space between the tunnel and the steel pipe. The operation is simple, safe and reliable, and it effectively meets the construction requirements of laying steel pipes through shield tunnels.

[0095] For further information, please refer to Figures 1 to 3 , step S200 comprises the following steps:

[0096] S201: The first section of steel pipe is introduced into the shield tunnel from the first end well, and the consolidation construction is carried out while filling at the predetermined position in the middle of the tunnel.

[0097] For details, please refer to Figure 3 , Figure 4 as well as Fig.14 When laying the first section of steel pipe through the pipeline, the following steps are included:

[0098] S11. Two pairs of steel pipe supporting brackets 1 are respectively welded and fixed to the front end and rear end bottom of the first steel pipe section. Two transfer vehicles 2 support the front end and rear end of the first steel pipe section based on an I-beam shoulder beam 10, and transfer the first steel pipe section to the predetermined position in the middle of the tunnel; the predetermined position in the middle of the tunnel here can be within the predetermined construction area of ​​the first steel pipe section.

[0099] S12. On both sides of each barge 2, a temporary support assembly 3 and a corbel support rod assembly 4 are respectively fixed using the longitudinal hand holes of the shield tunnel segment 8.

[0100] S13, the cylinder jacks 32 in the two temporary support assemblies 3 respectively lift the I-beam shoulder beams 10 supporting the front and rear ends of the first steel pipe section, so that the first steel pipe section is separated from the two lighter vehicles 2.

[0101] S14, adjusting the lifting height of the cylinder jack 32 so that the first section of the steel pipe is lowered to the crossing consolidation design elevation.

[0102] S15. Replace the steel pipe support corbel 1 supporting the first steel pipe section that has been lowered to the consolidation design elevation with the corbel support rod assembly 4; at this time, the two temporary support assemblies 3 at the bottom of the first steel pipe section can be evacuated and used for temporary support of other subsequent steel pipe sections 7, saving construction costs.

[0103] S16. A foam concrete annular formwork 5 is respectively installed between the annular gap between the outer wall of the front end and the rear end of the first steel pipe section and the shield tunnel, and fluidized solidified soil is filled in the space enclosed by the two foam concrete annular formworks 5 to consolidate the first steel pipe section.

[0104] S202: With the consolidated first section of steel pipe as the center, the first well and the second well arranged at both ends of the shield tunnel section are alternately used as the construction wells for the second section of steel pipe to pass through and lay, and the second section of steel pipe is laid and filled and consolidated at the same time.

[0105] Please refer to Figures 5 to 8 , Fig.15 When laying a secondary steel pipe section through and through, the secondary steel pipe section is a non-first steel pipe section (that is, all steel pipe sections 7 except the first steel pipe section are called secondary steel pipe sections), including the following steps:

[0106] S21, only a pair of steel pipe support brackets 1 are welded and fixed to the bottom of the rear end of the secondary steel pipe section, and two barges 2 support the front and rear ends of the secondary steel pipe section based on a pipe support short beam 9 and an I-beam shoulder beam 10, respectively, and barge the secondary steel pipe section to the construction area of ​​the adjacent secondary steel pipe section where the steel pipe section has been consolidated; in other words, for the remaining steel pipe sections 7 except the first steel pipe section, only a pair of steel pipe support brackets 1 are welded to the bottom of both sides of the rear end of the steel pipe section 7 (the steel pipe support brackets 1 are not welded to the bottom of the front end), and the front end of the steel pipe section 7 shares the extended steel pipe support bracket 1 at the bottom of the rear end of the previous steel pipe section 7 that is connected to it during the through-laying construction process. Reasonable arrangement of the application of construction components allows the construction to proceed in an orderly manner while minimizing the consumption of construction components and reducing construction costs.

[0107] S22. On both sides of each barge 2, a temporary support assembly 3 is fixed respectively by using the longitudinal hand holes of the shield tunnel segment 8; on both sides of the predetermined position in front of the barge 2 at the rear end of the secondary steel pipe section, a corbel support rod assembly 4 is fixed respectively by using the longitudinal hand holes of the shield tunnel segment 8.

[0108] For S21 and S22, the specific situation in this embodiment is as follows: when the distance between the front end of the secondary steel pipe section and the rear end of the adjacent consolidated steel pipe section is about 0.5m, the transportation is stopped. At this time, at the front end of the secondary steel pipe section (i.e., the steel pipe section 7 to be consolidated), the corbel support rod assembly 4 is adjusted and positioned to press against the extended steel pipe support corbel 1 of the consolidated steel pipe section, and a temporary support assembly 3 is placed under the pipe support short beam 9 at the front end of the secondary steel pipe section. A temporary support assembly 3 is also placed under the I-beam shoulder beam 10 at the rear end, and a corbel support rod assembly is placed at a distance of about 0.5m in front of the temporary support assembly 3 placed at the rear end of the secondary steel pipe section.

[0109] S23, please refer to Figures 5 to 8 , Fig.10 Based on the cylinder jacks 32 in the two temporary support assemblies 3, the pipe support short beam 9 at the front end and the I-beam shoulder beam 10 at the rear end of the secondary steel pipe section are lifted respectively to make the secondary steel pipe section separate from the two lighter vehicles 2, and the front end of the secondary steel pipe section is placed on the steel pipe support bracket 1 extending outward from the rear end of the adjacent consolidated steel pipe section, and the rear end of the secondary steel pipe section and the I-beam shoulder beam 10 thereunder are placed on the slide rail 6 on the jack base 31 at the bottom of the rear end of the secondary steel pipe section, one end of the slide rail 6 is set on the jack base 31 at the bottom of the rear end of the secondary steel pipe section, and the other end is set on the shelf platform 46 of the bracket support rod assembly 4 at the bottom of the secondary steel pipe section (such as Figure 5 Specifically, the cylinder jack 32 and the bracket support rod assembly 4 of the two temporary support assemblies 3 mentioned in S23 are both located in the predetermined construction area of ​​the secondary steel pipe section to support the completion of the through-laying construction of the secondary steel pipe section.

[0110] S24, remove the pipe support short beam 9 and the temporary support assembly 3 located at the front end bottom of the secondary steel pipe section.

[0111] S25, push the tail end of the secondary steel pipe section horizontally, and push the secondary steel pipe section along the slide rail 6 to the extended projection surface of the steel pipe support bracket 1 at the bottom of the rear end of the consolidated steel pipe section, so that the front end port of the secondary steel pipe section is docked with the rear end port of the consolidated steel pipe section, and the steel pipe support bracket 1 at the bottom of the rear end of the secondary steel pipe section is supported and docked with the bracket support rod assembly 4 at the bottom of the secondary steel pipe section. Preferably, as Figure 1 and Figure 2 As shown, the tail end of the secondary steel pipe section is pushed horizontally by a cylinder jack 32 vertically mounted on the wall of the working well. In this embodiment, two cylinder jacks 32 arranged parallel to each other are arranged behind the tail end of the secondary steel pipe section, and a horizontal pushing force is applied to the secondary steel pipe section by pushing, so that it slowly approaches the rear port of the consolidated steel pipe section along the slide rail 6 until the ports of the two pipe sections are closely aligned, and the horizontal pushing stops.

[0112] S26. Perform welding construction on the end faces where the secondary steel pipe section is butted against the consolidated steel pipe section.

[0113] S27. A foam concrete annular template is installed between the outer wall of the rear end of the secondary steel pipe section and the annular gap between the shield tunnel (the front end uses the solidified foam concrete of the consolidated steel pipe section as a head), and the closed space formed by the solidified foam concrete filling end face of the previously positioned and consolidated steel pipe section is filled with fluidized solidified soil to consolidate the secondary steel pipe section.

[0114] For details, please refer to Figures 5 to 8 The present invention is described by taking the second steel pipe section 7 as an example. When the second steel pipe section 7 is laid through, the first steel pipe section is the adjacent consolidated steel pipe section. It can be understood that the construction of the third steel pipe section 7 is to enter the shield tunnel from the first well at the left end and to pass through the laying construction, and the construction of the fourth steel pipe section 7 is to enter the shield tunnel from the second well at the right end and to pass through the laying construction (such as Figure 8 As shown in the figure, the first well and the second well arranged at both ends of the shield tunnel section are alternately used as the construction wells for the second steel pipe section to pass through and lay. The two wells are used for alternating construction, and each steel pipe section 7 is filled and consolidated while being laid in each well. Compared with directly laying a whole steel pipe through and laying, the steel pipe section 7 is constructed section by section, which has a larger construction space, is convenient for construction, and can better ensure the filling and consolidation effect of the steel pipe. The entire construction process is simple to operate, and the construction of laying steel pipes through the shield tunnel is carried out safely and reliably.

[0115] Among them, please refer to Figure 4 and Fig.11 In S16 and S27, the process of installing the foam concrete annular formwork 5 between the outer wall of the first steel pipe section and the second steel pipe section and the annular gap between the shield tunnel includes:

[0116] First, the annular body 51 of the annular formwork 5 filled with foam concrete is manufactured according to the size of the annular gap, and a hollow sealing rubber strip 52 is assembled on the outer circumference of the annular body 51; wherein, the inner diameter of the annular body 51 is greater than or equal to the outer diameter of the steel pipe, and its outer diameter is smaller than the inner diameter of the shield tunnel; the annular formwork 5 filled with foam concrete is installed in the annular gap; the cavity of the hollow sealing rubber strip 52 of the annular formwork 5 filled with foam concrete is inflated or filled with grease to expand the hollow sealing rubber strip 52, and the annular body 51 is fitted and sealed with the inner wall of the shield tunnel segment 8, thereby ensuring the implementation of the filling and consolidation condition of the space between the tunnel and the steel pipe with foam concrete.

[0117] The construction method based on the present invention makes the tunnel hole coaxial with the steel pipe, and a large gap for filling the fluidized solidified soil will be left around it. There is no need to lay the steel pipe through the entire pipe for construction, and a permanent pipe bracket or rail must be pre-installed at the bottom. In order to ensure the quality of the fluidized solidified soil filling, a number of joint valves for filling the fluidized solidified soil must be arranged around the inner wall of the steel pipe at intervals. The construction is convenient and can better ensure the filling and consolidation effect of the steel pipe.

[0118] It should be noted that, for the aforementioned method embodiments, for the sake of simplicity, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the present application is not limited by the described order of actions, because according to the present application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present application.

[0119] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0120] The above description is only a description of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Any changes or modifications made by a person skilled in the art in the field of the present invention based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. A construction method for laying steel pipes through a shield tunnel, characterized in that: The following steps are involved: S100, dividing the through-through steel pipe into a plurality of steel pipe sections according to preset principles; wherein the preset principles include: the strength of the steel pipe section, the operation cost, and the range of the longitudinal hand holes of the shield segment that can be covered by the steel pipe section; S200. Alternately use the two end wells arranged during the shield tunnel section excavation process as steel pipe crossing and laying construction wells, and lay and fill the steel pipe sections from the middle of the tunnel to the two end wells while consolidating them, until all steel pipe sections are laid in place throughout the entire shield tunnel as required; the laying and filling consolidation construction of each steel pipe section includes: sequentially pushing and transporting in the shield tunnel, positioning at designated positions, welding inside the pipe, and filling and consolidating with fluidized solidified soil.

2. The construction method for laying steel pipes through a shield tunnel as claimed in claim 1, characterized in that: Step S200 includes the following steps: The first section of steel pipe is put into the shield tunnel from the first end well, and the filling and consolidation construction is carried out at the predetermined position in the middle of the tunnel; With the consolidated first section of steel pipe as the center, the first well and the second well arranged at both ends of the shield tunnel section are alternately used as the construction wells for the second section of steel pipe to pass through and lay, and the second section of steel pipe is laid and filled and consolidated at the same time.

3. The construction method for laying steel pipes through a shield tunnel as claimed in claim 2, characterized in that: When laying the first steel pipe section through, the following steps are included: S11. Two pairs of steel pipe supporting brackets are welded and fixed to the front end and rear end bottom of the first steel pipe section respectively. Two barge trucks support the front end and rear end of the first steel pipe section based on an I-beam shoulder beam respectively, and barge the first steel pipe section to the predetermined position in the middle of the tunnel; S12. On both sides of each barge, a temporary support assembly and a corbel support rod assembly are fixed respectively by using the longitudinal hand holes of the shield tunnel segments; S13, using the cylinder jacks in the two temporary support assemblies to respectively lift the I-beam shoulder beams supporting the front and rear ends of the first steel pipe section, so that the first steel pipe section can be separated from the two lightering vehicles; S14. Adjust the lifting height of the oil cylinder jack so that the first section of the steel pipe is lowered to the crossing consolidation design elevation; S15, replace the steel pipe support bracket that supports the first steel pipe section that has been lowered to the consolidation design elevation based on the bracket support rod assembly; S16. Install a foam concrete annular formwork between the outer wall of the front and rear ends of the first steel pipe section and the annular gap between the shield tunnel, and fill the space enclosed by the two foam concrete annular formworks with fluidized solidified soil to consolidate the first steel pipe section.

4. The construction method for laying steel pipes through a shield tunnel as claimed in claim 3, characterized in that: When laying a second steel pipe section through and through, the second steel pipe section is not the first steel pipe section, and the following steps are included: S21. Only one pair of steel pipe supporting brackets is welded and fixed to the bottom of the rear end of the secondary steel pipe section. Two transfer vehicles support the front and rear ends of the secondary steel pipe section based on a pipe supporting short beam and an I-beam shoulder beam respectively, and transfer the secondary steel pipe section to the construction area of ​​the secondary steel pipe section adjacent to the consolidated steel pipe section; S22. On both sides of each barge, a temporary support assembly is fixed by using the longitudinal hand hole of the shield tunnel segment; on both sides of the predetermined position in front of the barge at the rear end of the secondary steel pipe section, a bracket support rod assembly is fixed by using the longitudinal hand hole of the shield tunnel segment; S23, using the cylinder jacks in the two temporary support assemblies to respectively lift the pipe support short beam at the front end and the I-beam shoulder beam at the rear end of the secondary steel pipe section, so that the secondary steel pipe section can be separated from the two lighters, and the front end of the secondary steel pipe section is placed on the steel pipe support bracket extending outward from the rear end of the adjacent consolidated steel pipe section, and the rear end of the secondary steel pipe section and the I-beam shoulder beam thereunder are placed on the slide rail on the jack base at the bottom of the rear end of the secondary steel pipe section, one end of the slide rail is placed on the jack base at the bottom of the rear end of the secondary steel pipe section, and the other end is placed on the placement platform of the bracket support rod assembly at the bottom of the secondary steel pipe section; S24, remove the pipe support short beam and temporary support assembly located at the front end bottom of the second steel pipe section; S25, push the tail end of the secondary steel pipe section horizontally, and push the secondary steel pipe section along the slide rail to the extended projection surface of the steel pipe support bracket at the bottom of the rear end of the consolidated steel pipe section, so that the front end port of the secondary steel pipe section is docked with the rear end port of the consolidated steel pipe section, and the steel pipe support bracket at the bottom of the rear end of the secondary steel pipe section is supported and docked with the bracket support rod assembly at the bottom of the secondary steel pipe section; S26, welding the end faces of the secondary steel pipe section and the consolidated steel pipe section; S27. A foam concrete annular template is installed between the outer wall of the rear end of the secondary steel pipe section and the annular gap between the shield tunnel, and the closed space formed by the solidified foam concrete filling end face of the previously positioned and consolidated steel pipe section is filled with fluidized solidified soil to consolidate the secondary steel pipe section.

5. The construction method for laying steel pipes through a shield tunnel as claimed in claim 4, characterized in that: In S16 and S27, the process of installing the foam concrete ring formwork filled between the outer wall of the first steel pipe section and the second steel pipe section and the ring gap between the shield tunnel includes: First, a ring body filled with foam concrete ring template is manufactured according to the size of the ring gap, and a hollow sealing rubber strip is assembled on the outer circumference of the ring body; wherein the inner diameter of the ring body is greater than or equal to the outer diameter of the steel pipe, and its outer diameter is smaller than the inner diameter of the shield tunnel; Installing a foam concrete-filled annular formwork in the annular gap; The cavity of the hollow sealing rubber strip filled with the foam concrete annular formwork is inflated with air or grease to expand the hollow sealing rubber strip, so that the annular body is fitted and sealed with the inner wall of the shield tunnel segment.

6. The construction method for laying steel pipes through a shield tunnel as claimed in claim 1, characterized in that: In S200, each section of the steel pipe is being filled and consolidated while being laid: The steel pipe sections are pushed to their respective construction areas in sequence using barges and jacks.

7. The construction method for laying steel pipes through a shield tunnel as claimed in claim 1, characterized in that: In S200, each section of the steel pipe is being filled and consolidated while being laid: Based on the pipe support short beam, I-beam shoulder beam, steel pipe support bracket, temporary support assembly, bracket support rod assembly and slide rail, the steel pipe section is pushed to the designated position for positioning; The pipe support short beam is used to temporarily support one end of the steel pipe section that is not welded to the steel pipe support bracket; The steel pipe supporting bracket is symmetrically welded to the bottom of at least one end of a steel pipe section to support the steel pipe section; The temporary support assembly includes: a jack base and a cylinder jack detachably arranged on the jack base; the jack base is detachably installed in the longitudinal hand hole of the shield tunnel segment at the corresponding position during the laying process of each steel pipe section, so that the top rod of the cylinder jack is perpendicular to the axis of the shield tunnel; the I-beam shoulder beam at the bottom of the steel pipe section transported by the lighter is temporarily supported by the cylinder jack, so that the steel pipe section is separated from the lighter; The bracket support rod assembly is butt-jointed with the steel pipe support bracket at the bottom of the steel pipe section, and is used to replace the steel pipe section that is lowered to the consolidation design elevation by the cylinder jack; The slide rail is used to be temporarily set up in the predetermined construction area of ​​the secondary steel pipe section except the first steel pipe section, between the placing platform of the corbel support rod assembly and the jack base.

8. The construction method for laying steel pipes through a shield tunnel as claimed in claim 7, characterized in that: The steel pipe support bracket includes a first body, a first end of the first body is an arc surface adapted to the curvature of the outer wall of the steel pipe, and a second end opposite to the first end is a plane, so that the steel pipe section can be stably placed under the support of the two steel pipe support brackets; The jack base comprises: a second body, a mounting groove opened at the top of the second body, and a connecting component arranged at the bottom of the second body; the bottom of the second body is an arc surface adapted to the arc of the shield tunnel segment, and the connecting component is fixed in the longitudinal hand hole of the shield tunnel segment with bolts, and when the bottom of the second body is fitted with the shield tunnel segment, the opening direction of the mounting groove is vertically upward, so that the top rod of the oil cylinder jack installed in the mounting groove is perpendicular to the axis of the shield tunnel; The corbel support rod assembly includes: a sliding shoe, a sliding rod which is placed in the sliding shoe and can slide relative to the sliding shoe, a wedge which can pass through the overlapping window of the sliding shoe and the sliding rod, a base arranged at the bottom of the sliding shoe, a connecting component arranged at the bottom of the base, and a placing platform arranged on one side of the base; wherein, the bottom of the base is an arc surface adapted to the curvature of the shield tunnel segment, the connecting component is fixed in the longitudinal hand hole of the shield tunnel segment with bolts, and the bottom of the base is fitted with the shield tunnel segment while the opening direction of the sliding shoe is vertically upward, so that the sliding rod placed in the sliding shoe is perpendicular to the axis of the shield tunnel.

9. The construction method for laying steel pipes through a shield tunnel as claimed in claim 1, characterized in that: In S200, each section of the steel pipe is being filled and consolidated while being laid: Based on installing a filled foam concrete annular formwork respectively between the outer wall of the front end and the rear end of the steel pipe section and the annular gap between the shield tunnel, the fluidized solidified soil is filled in the space enclosed by the two filled foam concrete annular formworks to consolidate the steel pipe section; wherein the filled foam concrete annular formwork comprises: an annular body and a hollow sealing rubber strip assembled on the outer circumference of the annular body; wherein the inner diameter of the annular body is greater than or equal to the outer diameter of the steel pipe, and its outer diameter is smaller than the inner diameter of the shield tunnel; wherein the annular body comprises several sub-bodies, and the sub-bodies are spliced ​​into an annular body in pairs based on bolts; wherein the outer circumference of each sub-body is formed with a notch and an end face pressure plate for fitting the circular hollow sealing rubber strip.

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