Construction assembly and construction method for laying steel pipe in shield tunnel in penetrating mode

Abstract

The invention provides a construction assembly and a construction method for laying a steel pipe in a shield tunnel in a penetrating mode. The construction assembly comprises a steel pipe supporting bracket, a lightering vehicle, a temporary supporting assembly, a bracket supporting rod assembly and a filling bubble concrete annular formwork. According to the construction method for penetrating and paving the steel pipe in the shield tunnel, operation procedures needed by carrying, jacking and consolidation of each steel pipe section in the construction method for penetrating and paving the steel pipe in the shield tunnel are studied, and an operation machine tool (namely a construction assembly) constructed in a gap space between the tunnel and the steel pipe is designed in a targeted mode. Each part can be conveniently carried and operated by manpower in the gap space between the tunnel and the steel pipe, operation is easy, safety and reliability are achieved, and the construction requirement for penetrating and laying the steel pipe in the shield tunnel is effectively met.

Description

Technical Field

[0001] The present invention relates to the technical field of urban integrated pipe gallery, and in particular to a construction component and 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. However, the working surface in the shield tunnel is limited, and some even have to operate in the gap space between the tunnel and the steel pipe. The working surface is even narrower, making it difficult for general conventional hoisting and lifting equipment to play a role.

[0003] Therefore, how to carry out the construction of laying steel pipes through shield tunnels with relatively small investment, simple operation, safety and reliability under specific spatial environment and construction technology 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 component and a construction method for laying steel pipes through a shield tunnel. The various parts of the construction component are safe and reliable as well as compact and light. Each part can be conveniently carried and operated by manpower in the gap space between the tunnel and the steel pipe. The operation is simple, safe and reliable, and the construction needs of laying steel pipes through a shield tunnel are effectively met.

[0005] In order to solve the above technical problems, the present invention provides a construction assembly, which includes:

[0006] 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;

[0007] The barge truck uses the I-beam shoulder beam to support the steel pipe support bracket to barge the steel pipe section to the designated construction area;

[0008] 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;

[0009] 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;

[0010] The foamed concrete ring formwork is filled to close the annular gap between the steel pipe section with coinciding axes and the shield tunnel.

[0011] Optionally, in the construction assembly, the steel pipe support corbel includes a first body, the first end of the first body is an arc surface that matches 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.

[0012] Optionally, in the construction assembly, the jack base includes: 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 curvature of the shield tunnel segment, and the connecting component is fixed in the longitudinal hand hole of the shield tunnel segment with bolts. When the bottom of the second body is fitted to the shield tunnel segment, the opening direction of the mounting groove is vertically upward, so that the top rod of the cylinder jack installed in the mounting groove is perpendicular to the axis of the shield tunnel.

[0013] Optionally, in the construction assembly, the corbel support rod assembly includes: a sliding shoe, a sliding rod placed in the sliding shoe and able to slide relative to the sliding shoe, a wedge that can penetrate 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 shelf platform arranged on one side of the base; wherein, the bottom of the base is an arc surface that adapts to the curvature of the shield tunnel segment, the connecting component is fixed in the longitudinal hand hole of the shield tunnel segment by 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.

[0014] Optionally, in the construction assembly, the foam concrete filled annular formwork includes: 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.

[0015] Optionally, in the construction assembly, the annular body includes a plurality of sub-bodies, which are spliced ​​into an annular body in pairs by bolts; wherein the outer circumference of each sub-body is provided with a notch and an end face pressure plate for fitting a circular hollow sealing rubber strip.

[0016] Optionally, the construction assembly further includes: a short pipe support beam for temporarily supporting one end of a steel pipe section of a steel pipe support corbel that is not welded and fixed.

[0017] Optionally, the construction assembly also includes: a slide rail, which is used to temporarily set up in the predetermined construction area of ​​the secondary steel pipe section other than the first steel pipe section, between the placing platform of the corbel support rod assembly and the jack base; the secondary steel pipe section is pushed along the slide rail to the outer projection surface of the steel pipe supporting corbel at the rear end of the previous steel pipe section that has been laid in place, so as to dock with the port at the rear end of the steel pipe section that has been laid in place, and share the same steel pipe supporting corbel.

[0018] The present invention also 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:

[0019] When laying the first steel pipe section through, the following steps are included:

[0020] 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;

[0021] 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;

[0022] 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;

[0023] 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;

[0024] 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;

[0025] S16, installing a foam concrete annular formwork between the outer wall of the front end and the rear end of the first steel pipe section and the annular gap between the shield tunnel, and filling the space enclosed by the two foam concrete annular formworks with fluidized solidified soil to consolidate the first steel pipe section;

[0026] 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:

[0027] 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;

[0028] 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;

[0029] 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;

[0030] S24, remove the pipe support short beam and temporary support assembly located at the front end bottom of the second steel pipe section;

[0031] 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;

[0032] S26, welding the end faces of the secondary steel pipe section and the consolidated steel pipe section;

[0033] 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.

[0034] 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:

[0035] 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;

[0036] Installing a foam concrete-filled annular formwork in the annular gap;

[0037] 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.

[0038] The beneficial effects of the construction assembly and the construction method for laying steel pipes through a shield tunnel provided by the present invention are as follows:

[0039] 1) Design a temporary lifting structure according to local conditions. Through the design of the jack base structure, the jack 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 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, and convenient for workers to carry and move.

[0040] 2) Design a stable support structure 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 perpendicular 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 staff to carry and move.

[0041] 3) In view of the need to fill the fluidized solidified soil between the steel pipe section and the shield tunnel, which involves the problem of closing the annular gap between the steel pipe section and the shield tunnel, a modularly assembled foamed concrete annular formwork is 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.

[0042] 4) The steel pipe sections are transported in the shield tunnel by using a transport vehicle, which saves manpower and material resources and improves construction efficiency.

[0043] 5) Each part of the construction assembly designed by the present invention 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 effectively meets the construction requirements of laying steel pipes through shield tunnels. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] 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.

[0045] Figure 1 Schematic diagram of a ring-shaped template filled with foam concrete when flattened in one embodiment of the present invention;

[0046] Figure 2a yes Figure 1 Schematic diagram of the structure along direction B;

[0047] Figure 2b yes Figure 1 Schematic diagram of the structure along AA direction;

[0048] Figure 3 It is a schematic diagram of the gap filling and template sealing between the shield tunnel and the steel pipe cross section in one embodiment of the present invention;

[0049] Figure 4 It is a structural schematic diagram 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 accordance with an embodiment of the present invention;

[0050] Figure 5 yes Figure 4 Schematic diagram of the structure along the A direction;

[0051] Figure 6 It is a schematic diagram of a temporary support assembly and a corbel support rod assembly combined to lift, place, and fix a steel pipe section in one embodiment of the present invention;

[0052] Figure 7 Schematic diagram of a steel pipe support bracket fixedly welded to the bottom of a steel pipe section in one embodiment of the present invention;

[0053] Figure 8 yes Figure 7 Structural schematic diagram of the middle steel tube supporting bracket along direction A;

[0054] Fig. 9 is a cross-sectional view of a slide bar, a slide shoe, and a wedge iron after being assembled in one embodiment of the present invention;

[0055] Fig.10 A front view of a slide bar in one embodiment of the present invention;

[0056] Fig.11 yes Fig.10 A cross-sectional view of

[0057] Fig.12 A schematic diagram of the structure of a wedge iron in one embodiment of the present invention;

[0058] Fig.13 is a front view of a corbel support rod assembly in one embodiment of the present invention;

[0059] Fig.14a yes Fig.13 Side view of

[0060] Fig.14b yes Fig.13 A top view of

[0061] Fig.15 is a schematic diagram of a base of a corbel support rod assembly in one embodiment of the present invention;

[0062] Fig.16 is a schematic diagram of an embodiment of the present invention after S13 is executed when the first steel pipe section is laid through;

[0063] Fig.17 is a schematic diagram of an embodiment of the present invention after S23 is executed when laying a second steel pipe section through;

[0064] Fig.18 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;

[0065] Fig.19 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.

[0066] In the figure:

[0067] 1-steel pipe supporting bracket; 11-first body;

[0068] 2-Lighter;

[0069] 3-temporary support assembly; 31-jack base; 311-second body; 312-connecting component; 32-cylinder jack;

[0070] 4-corbel support rod assembly; 41-slide shoe; 42-slide rod; 43-window; 44-wedge iron; 45-base; 46-shelf platform; 47-connecting component;

[0071] 5-filled foam concrete annular formwork; 51-annular body; 52-hollow sealing rubber strip;

[0072] 6- Slide rail;

[0073] 7-Steel pipe section;

[0074] 8- shield tunnel segments;

[0075] 9- pipe support short beam;

[0076] 10-I-beam shoulder pole beam. DETAILED DESCRIPTION

[0077] The following is a further detailed description of the construction assembly and 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 all 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.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] 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.

[0082] Please refer to Fig.16 and Fig.17The construction assembly provided by the present invention is suitable for the construction of laying steel pipes through shield tunnels, and is specifically used in a construction method in which a steel pipe is divided into several steel pipe sections 7 for laying through the shield tunnel. The construction assembly includes: a steel pipe supporting bracket 1, a transfer vehicle 2, a temporary support assembly 3, a bracket support rod assembly 4, and a foam concrete filled annular formwork 5, wherein the steel pipe supporting 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 transfer vehicle 2 supports the steel pipe supporting bracket 1 based on an I-beam shoulder beam 10 to transfer the steel pipe section 7 to a predetermined construction area; the temporary support assembly 3 includes: a jack base 31 and a detachable jack base 32. The cylinder jack 32 on 31; the jack base 31 can be detachably installed in the longitudinal hand hole of the shield tunnel segment 8 at the corresponding position during the laying process of each steel pipe section, so that the top rod of the cylinder jack 32 is perpendicular to the axis of the shield tunnel; based on the cylinder jack 32, the I-beam shoulder beam 10 at the bottom of the steel pipe section 7 transported by the barge 2 is temporarily supported, so that the steel pipe section 7 is separated from the barge 2; the bracket support rod assembly 4 is docked with the steel pipe support bracket 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 filling foam concrete annular formwork 5 is used to close the annular gap between the steel pipe section 7 and the shield tunnel whose axes coincide.

[0083] The various parts of the construction components designed in the present invention are safe, reliable, small 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 effectively meets the construction requirements of laying steel pipes through shield tunnels.

[0084] For further information, please refer to Figure 7 and Figure 8 The steel pipe support corbel 1 includes a first body 11, the first end of the first body 11 is an arc surface that matches 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.

[0085] Please refer to Fig.16In this embodiment, 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 temporary jacking structure 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, and the jack base 31 is stably fixed, while ensuring that the top rod of the oil cylinder jack 32 assembled thereon is 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.

[0086] Please refer to Figures 4 to 6 , Figures 9 to 15 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. A stable support structure is designed according to local conditions. Through the structural design of the corbel support rod assembly 4, it has the function of fine-tuning the height up and down. The base 45 can be detachably installed in the longitudinal hand hole of the shield tunnel segment 8 at the corresponding position, so that the base 45 can be stably fixed while ensuring that the corbel support rod assembly 4 is fine-tuned and supported perpendicular to the axis of the shield tunnel. The corbel support rod assembly 4 can stably replace 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, can be assembled on site, is easy to operate, and is convenient for staff to carry and move.

[0087] 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.

[0088] Please refer to Figure 1 , Figure 2a , Figure 2b and Figure 3 The ring template 5 filled with foam concrete includes: a ring body 51 and a hollow sealing rubber strip 52 assembled on the outer circumference of the ring body 51; wherein, the inner diameter of the ring 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. Specifically, the ring body 51 includes several sub-bodies, and the sub-bodies are spliced ​​into the ring body 51 by bolts; wherein, the outer circumference of each sub-body is formed with a notch and an end face pressure plate for fitting the hollow ring sealing rubber strip 52. In view of the need to fill the fluidized solidified soil between the steel pipe section 7 and the shield tunnel, and the problem of closing the annular gap between the steel pipe section 7 and the shield tunnel, a ring template 5 filled with foam concrete that can be assembled in modular form is customized. The sub-bodies that can be assembled into the template are convenient for transportation and splicing in a small space. The spliced ​​template adapts to the size of the annular gap while ensuring its sealing effect and the consolidation effect of the filled fluidized solidified soil.

[0089] like Figure 1 As shown, the annular body 51 of the present invention is formed by splicing 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 butted together 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.

[0090] Furthermore, the construction components of the present invention also include: a pipe support short beam 9 and a slide rail 6. 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 to the steel pipe support corbel 1, which specifically corresponds to the end (front end) of the subsequent secondary steel pipe section 7 close to the consolidated steel pipe section. 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 placement platform 46 of the corbel support rod assembly 4 and the jack base 31; the secondary steel pipe section is pushed along the slide rail 6 to the outer projection surface of the steel pipe support corbel 1 at the rear end of the previous steel pipe section 7 that has been laid in place, so as to dock with the port at the rear end of the steel pipe section 7 that has been laid in place, and share the same steel pipe support corbel 1. In other words, the slide rail 6 serves as a guide to move the secondary steel pipe section toward the side of the steel pipe section 7 that has been laid in place, so that the front end of the secondary steel pipe section falls within the protruding projection surface of the steel pipe supporting corbel 1 at the rear end of the steel pipe section 7 that has been laid in place, and the port at the front end of the secondary steel pipe section (referred to as: front port) is closed and docked with the port at the rear end of the steel pipe section 7 that has been laid in place (referred to as: rear port), and at the same time, the steel pipe supporting corbel 1 at the bottom of the rear end of the secondary steel pipe section moves to the top of the corbel support rod assembly 4 and docks with the slide rod 42 of the corbel support rod assembly 4, so that the corbel support rod assembly 4 provides support for the bottom of the rear end of the secondary steel pipe section.

[0091] In order to better understand how the construction assembly of the present invention is constructed and applied in the actual construction process, the following will be combined with Figures 1 to 19 , a construction method for laying steel pipes through a shield tunnel using the construction assembly of the present invention is described in detail, which specifically includes the following steps:

[0092] In order to expand the construction space, the construction method of laying steel pipes through shield tunnels of the present invention divides the steel pipes into several steel pipe sections 7 for section-by-section laying. Which components are used in the construction assembly during the construction process depends on whether the construction object is the first steel pipe section or the second steel pipe section. The details are as follows:

[0093] Please refer to Figures 1 to 16 , Fig.18 When laying the first section of steel pipe through the pipeline, the following steps are included:

[0094] S11, two pairs of steel pipe supporting brackets 1 are welded and fixed to the front end and rear end bottom of the first steel pipe section, two barges 2 are respectively supported by an I-beam shoulder beam 10 on the front end and rear end of the first steel pipe section, and the first steel pipe section is barged to the predetermined position in the middle of the tunnel. The predetermined position in the middle of the tunnel here can be in the predetermined construction area of ​​the first steel pipe section.

[0095] 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.

[0096] S13, based on the cylinder jacks 32 in the two temporary support assemblies 3, the I-beam shoulder beams 10 supporting the front and rear ends of the first steel pipe section are lifted respectively, so that the first steel pipe section is separated from the two lighter vehicles 2 (such as Fig.16 shown).

[0097] 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.

[0098] S15, the steel pipe support corbel 1 supporting the first steel pipe section that has been lowered to the consolidation design elevation is replaced by the corbel support rod assembly 4. Specifically, the corbel support rod assembly 4 in S15 replaces the temporary support of the cylinder jack 32 in S14, and the first steel pipe section located at the consolidation design elevation is supported and fixed by 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 the temporary support of other subsequent steel pipe sections 7, saving construction costs.

[0099] 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.

[0100] Please refer to Figures 1 to 15 , Fig.17 as well as Fig.19 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:

[0101] 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.

[0102] 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.

[0103] 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 transfer is stopped. At this time, at the front end of the secondary steel pipe section (i.e., the steel pipe section 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.

[0104] S23, 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 Fig.17 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.

[0105] S24, remove the pipe support short beam 9 and the temporary support assembly 3 located at the bottom of the front end of the secondary steel pipe section, leaving the corbel brace assembly located at the bottom of the secondary steel pipe section and the temporary support assembly 3 placed at the bottom of the rear end; preferably, the barge 2 is detached using a battery vehicle, which is convenient and quick.

[0106] 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; the position of the bracket support rod assembly 4 at the bottom of the secondary steel pipe section is estimated in advance based on the position of the steel pipe support bracket 1 at the bottom of the secondary steel pipe section and the position of the front port of the secondary steel pipe section when simulating the docking with the rear port of the consolidated steel pipe section. Preferably, the rear end of the secondary steel pipe section is pushed horizontally by another jack to give the secondary steel pipe section a horizontal push force, 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 sections are closely aligned, and the horizontal push is stopped.

[0107] S26, welding construction is performed on the end surface where the second steel pipe section is butted against the consolidated steel pipe section, so as to complete the butting and closing of the two steel pipe sections 7.

[0108] S27. A foam concrete annular template 5 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.

[0109] Specifically, the process of installing a foam concrete-filled annular formwork 5 between the outer wall of the front end and the rear end of the secondary steel pipe section and the annular gap between the shield tunnel comprises:

[0110] 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.

[0111] 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.

[0112] 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.

[0113] 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 assembly, suitable for the construction of laying steel pipes through shield tunnels, wherein the steel pipes are divided into a plurality of steel pipe sections, characterized in that: include: 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 barge truck uses the I-beam shoulder beam to support the steel pipe support bracket to barge the steel pipe section to the designated construction area; 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 foamed concrete ring formwork is filled to close the annular gap between the steel pipe section with coinciding axes and the shield tunnel.

2. The construction assembly according to claim 1, characterized in that: The steel pipe supporting 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 placed stably under the support of the two steel pipe supporting brackets.

3. The construction assembly according to claim 1, characterized in that: The jack base includes: 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 curvature of the shield tunnel segment, and the connecting component is fixed in the longitudinal hand hole of the shield tunnel segment with bolts. 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 cylinder jack installed in the mounting groove is perpendicular to the axis of the shield tunnel.

4. The construction assembly according to claim 1, characterized in that: 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.

5. The construction assembly according to claim 1, characterized in that: The foam concrete filled 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.

6. The construction assembly according to claim 5, characterized in that: The annular body comprises several sub-bodies, which are spliced ​​into an annular body in pairs by bolts; wherein, the outer circumference of each sub-body is provided with a notch and an end face pressure plate for fitting an annular hollow sealing rubber strip.

7. The construction assembly according to claim 1, characterized in that: Also includes: The pipe support short beam is used to temporarily support one end of the steel pipe section that is not welded to the fixed steel pipe support corbel.

8. The construction assembly according to claim 1, characterized in that: Also includes: 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; the secondary steel pipe section is pushed along the slide rail to the extended projection surface of the steel pipe supporting corbel at the rear end of the previous steel pipe section that has been laid in place, so as to dock with the port at the rear end of the steel pipe section that has been laid in place, and share the same steel pipe supporting corbel.

9. A construction method for laying steel pipes through a shield tunnel, wherein the steel pipes are divided into a plurality of steel pipe sections, characterized in that: The construction is carried out using the construction assembly as described in any one of claims 1 to 8, comprising the following steps: 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, installing a foam concrete annular formwork between the outer wall of the front end and the rear end of the first steel pipe section and the annular gap between the shield tunnel, and filling the space enclosed by the two foam concrete annular formworks with fluidized solidified soil to consolidate the first steel pipe section; 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.

10. The construction method for laying steel pipes through a shield tunnel as claimed in claim 9, 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.

Images