Supporting structure method based on pipe roofing

Abstract

The invention relates to the technical field of pipe roofing supporting, in particular to a supporting structure method based on a pipe roofing. Comprising the following steps: pre-reinforcing a tunnel bottom plate; a test tube is prepared in advance for water stopping and deviation data collection; slurry balance pipe jacking; the muddy water is conveyed to a front excavation face of the pipe jacking machine head and is prevented from permeating into the excavation face; pre-stress tensioning is conducted; a hole is transversely punched in the pipe body, a prestressed corrugated pipe is installed in the hole, prestressed steel strand pulling is conducted, and concrete is poured into the pipe joints in the pulling area and between the pipe joints; tensioning and anchoring are conducted, specifically, the prestressed steel strands are tensioned, and prestressed steel strand anchoring parts are installed to fix the prestressed steel strands; grouting and anchor sealing are conducted, specifically, cement paste is injected, and anchor sealing treatment is conducted; the pipe is filled with concrete; the automatic tensioning device has the beneficial effects that the problems that continuous reciprocating automatic detection tensioning cannot be conducted on the steel strand in prestress construction, the detection effect is limited, and meanwhile potential safety hazards are likely to be caused are solved.

Description

Technical Field

[0001] The invention relates to the technical field of pipe-roof support technology, and more particularly to a support structure method based on pipe-roof. Background Art

[0002] Shallow soft soil mining method with small clearance tunnels places extremely high demands on the advance support method, especially in maintaining the stability of shallow cover and soft strata, controlling stratum deformation, and preventing collapse and roof fall accidents, which are directly related to the safety and economic benefits of the tunnel.

[0003] Commonly used methods for tunnel advance support include plug-in method, small grouting pipe 103 advance grouting method, shallow surface anchor grouting reinforcement method, horizontal rotary spraying or mixing method, freezing method, pipe shed method, pipe curtain method, etc.

[0004] Vertical jet grouting piles or steel pipe piles are often used at the tunnel base to further improve the soil's self-stability and overall bearing capacity. Vertical jet grouting piles or steel pipe piles need to be inserted during the tunnel excavation process, which prolongs the duration of tunnel excavation. There are also many interspersed working surfaces in the tunnel, which increases the construction risk.

[0005] At the same time, the current method of withdrawing tool anchors in prestressed construction is to apply grease on the surface of the anchor hole, wrap the surface of the clip with plastic film or grease, and after the jack is withdrawn, the construction workers will use methods such as hammering the tool anchor and shaking the steel strand to withdraw the anchor, but these methods still have a high probability of failing to withdraw the anchor;

[0006] Similar to the patent number CN202310124356.5, a pipe curtain support combined with horizontal rotary jet pile closed ring advanced support method is to carry out horizontal rotary jet grouting on the outside of the pipe curtain, arch foot and tunnel base before tunnel excavation after the completion of the pipe curtain construction; the pipe curtain is completed one by one by the "steel pipe hydraulic jacking, spiral excavation inside the pipe" jacking construction method; grouting small pipe, in order to reduce the stratum disturbance and settlement caused by the pipe curtain method construction, the outer wall of the pipe curtain is welded with a full-length Φ42×3.25mm grouting pipe. Grouting can be tracked during the pipe curtain construction process, and supplemented according to the monitoring situation; horizontal rotary jet is to use a horizontal directional drilling rig to drill horizontal holes, carry out horizontal rotary jet grouting construction, and form a closed horizontal rotary jet curtain body on the outside of the pipe curtain and the bottom of the tunnel in the form of concentric circles, which has a beam effect and soil improvement and strengthening effect, and the pipe curtain support combined with horizontal rotary jet pile closed ring.

[0007] However, the device is unable to perform continuous reciprocating automatic detection of the tensioning of steel strands during prestressed construction, and the detection effect is limited and it is easy to cause safety hazards. Summary of the invention

[0008] Therefore, the technical problem to be solved by the present invention is to overcome the problem in the prior art that it is impossible to perform continuous reciprocating automatic detection of the tensioning of steel strands during prestressed construction, the detection effect is limited and it is easy to cause safety hazards.

[0009] To this end, the technical solution adopted is a pipe-roof-based supporting structure method of the present invention, comprising the following steps:

[0010] S1: Pre-reinforcement of the tunnel floor; preparation of test pipes for water stopping and deflection data collection;

[0011] S2: Mud and water balance pipe jacking: send mud and water to the excavation surface in front of the pipe jacking machine head to prevent mud and water from penetrating into the excavation surface;

[0012] S3: Prestressing: drilling holes transversely in the pipe body, installing prestressed corrugated pipes in the holes, threading the prestressed steel strands, and pouring concrete in and between the pipe sections in the threading area;

[0013] S4: tensioning and anchoring: tensioning the prestressed steel strands, installing the prestressed steel strand anchoring components to fix the prestressed steel strands;

[0014] S5: Grouting and anchor sealing: inject cement slurry and perform anchor sealing treatment;

[0015] S6: Fill the pipe with concrete, excavate the channel and install the steel lining;

[0016] S7: Excavation and road paving in the channel.

[0017] Preferably, the S1 comprises:

[0018] S11: Destroy the surrounding soil by adding a pipe body for high-pressure jet cutting;

[0019] S12: pressurizing and conveying the hardened material slurry, spraying, cutting the formation, mixing, draining mud, and concentrating the mud;

[0020] S13: Through slurry preparation, slurry spraying, and subsequent slurry discharge and mud water treatment, an engineering construction chain is formed;

[0021] S14: The construction process can be monitored by monitoring the auxiliary flow and pressure data.

[0022] Preferably, the S2 comprises:

[0023] S21: Mix the mud and water to a set concentration and specific gravity;

[0024] S22: The mud water is delivered to the excavation surface in front of the pipe jacking machine head through the mud water delivery system, and the mud water forms an impermeable mud film on the excavation surface;

[0025] S23: By preventing mud and water from penetrating into the excavation surface, the mud and water pressure is adjusted to balance the groundwater pressure and soil pressure;

[0026] S24: As the pipe jacking machine head moves forward, the cutter disc cuts the soil. The cut residual soil is fully mixed with mud and water, and then transported by the mud discharge system to the ground mud and water separation equipment for treatment. The separated residual soil is transported away, and the mud and water are sent to the water supply system for recycling.

[0027] Preferably, the S3 comprises:

[0028] S31: Use a laser cutting machine to make horizontal holes in the tube body;

[0029] S32: installing a prestressed corrugated pipe in the through hole of the prestressed steel strand, and then threading the prestressed steel strand;

[0030] S33: After the prestressed steel strands are bundled, pour concrete in and between the pipe sections in the bundle-threading area.

[0031] Preferably, the S4 comprises:

[0032] S41: After the concrete strength reaches the required level, prestressed steel strands are tensioned;

[0033] S42: After the tensioning is stable, install the prestressed steel strand anchoring components to fix the prestressed steel strands so that they do not retract after the tensioning equipment is withdrawn.

[0034] Preferably, the S5 comprises:

[0035] S51: inject cement slurry into the gap between the prestressed steel strand and the prestressed corrugated pipe;

[0036] S52: After the strength of the injected cement slurry reaches the requirement, concrete is poured into the corner pipe section to wrap the prestressed steel strand anchoring components for anchor sealing.

[0037] Preferably, the S6 comprises:

[0038] S61: C40 slightly expanded fine stone concrete is used for grouting inside the pipe. Grouting is carried out from one end, and the grout outlet is located at the top of the steel pipe at the other end;

[0039] S62: When the slurry flows out of the slurry outlet, close the valve and pressurize to 0.8MPa; when the slurry is initially set and no longer flows, close the curtain pipe outlet and perform secondary grouting, and use plain cement slurry for grouting;

[0040] S63: Channel excavation adopts full-section excavation, the initial lining adopts 56A, and a steel lining is set every 3 meters.

[0041] Preferably, the S7 comprises:

[0042] S71: After the tunnel structure strength reaches the required level, the soil in the tunnel is excavated directly by an excavator or by adding water and pumping out the sludge;

[0043] S72: After the excavation of the channel is completed, the exposed surface will be decorated and renovated, and the road surface can be paved at the same time.

[0044] Preferably, the tensioning equipment comprises a base, a coarse adjustment sliding base is arranged on the base through threaded matching adjustment, a fine adjustment sliding base is arranged on the coarse adjustment sliding base through threaded matching adjustment, a movable roller rotating seat is fixed on the fine adjustment sliding base, and a stretching grinding movable roller is rotatably arranged on the movable roller rotating seat;

[0045] A fixed roller frame is fixed on the base, a stretching and grinding fixed roller is rotatably arranged in the fixed roller frame, and the stretching and grinding fixed roller and the stretching and grinding movable roller are symmetrically arranged;

[0046] A steel strand adder is provided at the side end of the base, and the steel strand adder adds steel strands into the stretching and grinding fixed roller and the stretching and grinding movable roller. A plurality of steel strand brakes are fixed on the stretching and grinding fixed roller and the stretching and grinding movable roller for clamping the added steel strands; the steel strands are tensioned by driving the stretching and grinding fixed roller and the stretching and grinding movable roller to rotate.

[0047] Preferably, two steel strand adders are respectively provided at both ends of the base, and the two steel strand adders add steel strands or pipe fittings through a support bracket, and the support bracket is fixed on the coarse adjustment sliding base, and a semicircular groove is provided on the support bracket for supporting the steel strands or pipe fittings;

[0048] The outer surfaces of the stretching and grinding fixed roller and the stretching and grinding movable roller are both frosted.

[0049] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures specifically pointed out in this application document.

[0050] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0052] Figure 1 It is a schematic flow chart of the pipe-roof-based supporting structure method of the present invention;

[0053] Figure 2 The overall structure of the tensioning device of the present invention is shown in FIG. Figure 1 ;

[0054] Figure 3 The overall structure of the tensioning device of the present invention is shown in FIG. Figure 2 ;

[0055] Figure 4 It is a structural schematic diagram of the rough adjustment of the stretching and grinding moving roller of the present invention;

[0056] Figure 5 It is a schematic structural diagram of the fine adjustment of the stretching and grinding moving roller of the present invention;

[0057] Figure 6 is a schematic structural diagram of a detection sliding frame of the present invention;

[0058] Figure 7 It is a structural schematic diagram of the stretching and grinding moving roller of the present invention;

[0059] Figure 8 It is a structural schematic diagram of the steel strand brake of the present invention;

[0060] Fig. 9 It is a structural schematic diagram of the base of the present invention;

[0061] Fig.10 2. It is a schematic structural diagram of the stretching and grinding fixed roller of the present invention;

[0062] Fig.11 It is a structural schematic diagram of the steel strand adder of the present invention and its adaptation for grinding use.

[0063] In the figure: base 1; coarse adjustment sliding base 2; fine adjustment sliding base 3; movable roller rotating seat 4; detection sliding frame one 5; stretching and grinding movable roller 6; detection sliding frame two 7; stretching and grinding fixed roller 8; coarse adjustment rotating screw shaft 10; fine adjustment rotating screw shaft 11; movable roller driver 12; sliding screw shaft 13; detection and cleaning frame 14; detection and cleaning driver 15; steel strand brake 16; brake clamping seat 17; steel strand adder 18; serrated clamping table 19; fixed roller frame 20; fixed roller driver 21; support bracket 22; side support frame 23; adding driver 24; symmetrical adding roller 25; brake drive motor 26. DETAILED DESCRIPTION

[0064] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0065] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "middle", "top", "bottom", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying 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 present application. The terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0066] In addition, 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 this application can be understood according to specific circumstances.

[0067] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature. Specific implementation method one:

[0069] like Figure 1 — Fig.11 As shown, a pipe-roof-based supporting structure method comprises the following steps:

[0070] S1: Pre-reinforcement of the tunnel floor; preparation of test pipes for water stopping and deflection data collection;

[0071] S2: Mud and water balance pipe jacking: send mud and water to the excavation surface in front of the pipe jacking machine head to prevent mud and water from penetrating into the excavation surface;

[0072] S3: Prestressing: drilling holes transversely in the pipe body, installing prestressed corrugated pipes in the holes, threading the prestressed steel strands, and pouring concrete in and between the pipe sections in the threading area;

[0073] S4: tensioning and anchoring: tensioning the prestressed steel strands, installing the prestressed steel strand anchoring components to fix the prestressed steel strands;

[0074] S5: Grouting and anchor sealing: inject cement slurry and perform anchor sealing treatment;

[0075] S6: Fill the pipe with concrete, excavate the channel and install the steel lining;

[0076] S7: Excavation and road paving in the channel.

[0077] The working principle and beneficial effects of this embodiment are as follows: pre-reinforcement of the tunnel floor; pre-making 4 test pipes to collect water-stopping and offset data; all-round high-pressure rotary jet reinforcement (MJS method piles) can also be used. All-round high-pressure rotary jet technology is a water-stopping reinforcement method that adapts to narrow spaces, large torque, and all-round swing spraying construction; through the equipment's unique porous tubes and front-end slurry suction device, the surrounding soil is cut and destroyed with a high-pressure jet, and the hardened material slurry is pressurized and transported, sprayed, cut into formations, mixed, drained, and concentrated; all completed in a unified manner. From slurry preparation and spraying to subsequent slurry drainage and mud and water treatment, an engineering construction chain is formed. Auxiliary flow and pressure data acquisition modules are used to achieve controllable construction process;

[0078] Mud and water balanced pipe jacking; The basic principle of the mud and water balanced pipe jacking process is to send mud and water adjusted to a certain concentration and specific gravity to the excavation surface in front of the pipe jacking head through the mud and water delivery system. The mud and water form an impermeable mud film on the excavation surface to prevent the mud and water from penetrating into the excavation surface. At the same time, the mud and water pressure is adjusted to balance the groundwater pressure and soil pressure to achieve the purpose of stabilizing the excavation surface. As the pipe jacking head moves forward, the cutterhead cuts the soil. After the cut residual soil is fully mixed with the mud and water, it is transported to the ground mud and water separation equipment for treatment by the mud discharge system. The separated residual soil is transported away, and the mud and water are sent to the water delivery system for recycling.

[0079] Prestressed tensioning; Horizontal drilling: Use a laser cutting machine to drill horizontal holes in the pipeline, install prestressed corrugated pipes in the holes through which the prestressed steel strands are passed, and then the prestressed steel strands are bundled. After the prestressed steel strands are bundled, pour concrete in and between the pipe sections in the bundle-passing area. Tensioning and anchoring: After the concrete strength reaches the specified requirements, tension the prestressed steel strands. After the tensioning is stable, install the prestressed steel strand anchoring components to fix the prestressed steel strands so that they do not shrink after the tensioning equipment is withdrawn. Grouting and anchor sealing: Inject cement slurry into the gap between the prestressed steel strands and the prestressed corrugated pipe. After the strength of the injected cement slurry reaches the specified requirements, pour concrete in the corner pipe section to wrap the prestressed steel strand anchoring components for anchor sealing; Filling the pipe with concrete: The purpose of filling the pipe is: first, to enhance the strength of the pipe curtain; second, to prevent ground subsidence caused by rust on the steel pipe;

[0080] C40 slightly expanded fine stone concrete is used for grouting inside the pipe. Grouting is carried out from one end, and the grout outlet is set at the top of the steel pipe at the other end. When the slurry flows out of the slurry outlet, the valve is closed and the pressure is increased to 0.8MPa. When the slurry is initially set and no longer flows, the curtain pipe outlet is closed for secondary grouting. Plain cement slurry can be used for grouting.

[0081] Channel excavation and installation of steel lining: Channel excavation adopts full-section excavation, and 56A is used for the initial lining;

[0082] I-beam: size is 560×166×12.5, with a steel lining every 3 meters;

[0083] Excavation and pavement laying in the tunnel: After the tunnel structure strength reaches the requirements, the soil in the tunnel can be excavated directly by excavators or by adding water to pump out the sludge;

[0084] The second is the decoration and renovation inside the channel. After the channel is excavated, the exposed surface is decorated and renovated, and the road surface can be paved at the same time. Specific implementation method 2:

[0086] like Figure 1 — Fig.11 As shown, a supporting structure method based on a pipe curtain, said S1 comprises:

[0087] S11: Destroy the surrounding soil by adding a pipe body for high-pressure jet cutting;

[0088] S12: pressurizing and conveying the hardened material slurry, spraying, cutting the formation, mixing, draining mud, and concentrating the mud;

[0089] S13: Through slurry preparation, slurry spraying, and subsequent slurry discharge and mud water treatment, an engineering construction chain is formed;

[0090] S14: The construction process can be monitored by monitoring the auxiliary flow and pressure data.

[0091] The working principle and beneficial effects of this embodiment are as follows: pre-reinforcement of the tunnel floor; pre-making 4 test pipes to collect water-stopping and offset data; all-round high-pressure rotary jet reinforcement (MJS method piles) can also be used. All-round high-pressure rotary jet technology is a water-stopping reinforcement method that adapts to narrow spaces, large torques, and all-round swing spraying construction; through the unique porous pipes and front-end slurry suction devices of the equipment, the surrounding soil is cut and destroyed with high-pressure jets to realize pressurized transportation, injection, cutting of formations, mixing, mud discharge, and concentrated mud of the hardened material slurry; unified completion. From slurry making and grouting to subsequent slurry discharge and mud and water treatment, an engineering construction chain is formed. Auxiliary flow and pressure data collection modules are used to realize controllable construction process. Specific implementation method three:

[0093] like Figure 1 — Fig.11 As shown, a supporting structure method based on a pipe curtain, said S2 comprises:

[0094] S21: Mix the mud and water to a set concentration and specific gravity;

[0095] S22: The mud water is delivered to the excavation surface in front of the pipe jacking machine head through the mud water delivery system, and the mud water forms an impermeable mud film on the excavation surface;

[0096] S23: By preventing mud and water from penetrating into the excavation surface, the mud and water pressure is adjusted to balance the groundwater pressure and soil pressure;

[0097] S24: As the pipe jacking machine head moves forward, the cutter disc cuts the soil. The cut residual soil is fully mixed with mud and water, and then transported by the mud discharge system to the ground mud and water separation equipment for treatment. The separated residual soil is transported away, and the mud and water are sent to the water supply system for recycling.

[0098] The working principle and beneficial effects of this embodiment are as follows: the basic principle of the mud-water balanced pipe jacking process is to deliver mud-water adjusted to a certain concentration and specific gravity to the excavation surface in front of the pipe jacking head through a mud-water delivery system, and the mud-water forms an impermeable mud film on the excavation surface, which can prevent the mud-water from penetrating into the excavation surface. At the same time, the mud-water pressure is adjusted to balance the groundwater pressure and soil pressure, so as to achieve the purpose of stabilizing the excavation surface; while the pipe jacking head moves forward, the cutter disc cuts the soil, and the cut residual soil is fully mixed with the mud-water, and then transported by the mud discharge system to the ground mud-water separation equipment for treatment, the separated residual soil is transported away, and the mud-water is sent to the water delivery system for recycling. Specific implementation method four:

[0100] like Figure 1 — Fig.11 As shown, a supporting structure method based on a pipe curtain, said S3 comprises:

[0101] S31: Use a laser cutting machine to make horizontal holes in the tube body;

[0102] S32: installing a prestressed corrugated pipe in the through hole of the prestressed steel strand, and then threading the prestressed steel strand;

[0103] S33: After the prestressed steel strands are bundled, pour concrete in and between the pipe sections in the bundle-threading area.

[0104] The working principle and beneficial effects of this embodiment are as follows: a laser cutting machine is used to make holes transversely in the pipeline, a prestressed corrugated pipe is installed in the prestressed steel strand through hole, and then the prestressed steel strand is bundled. After the prestressed steel strand is bundled, concrete is poured in and between the pipe sections in the bundle area. Specific implementation method five:

[0106] like Figure 1 — Fig.11 As shown, a supporting structure method based on a pipe curtain, said S4 comprises:

[0107] S41: After the concrete strength reaches the required level, prestressed steel strands are tensioned;

[0108] S42: After the tensioning is stable, install the prestressed steel strand anchoring components to fix the prestressed steel strands so that they do not retract after the tensioning equipment is withdrawn.

[0109] The working principle and beneficial effects of this embodiment are as follows: tensioning and anchoring: after the concrete strength reaches the specified requirements, the prestressed steel strand is tensioned. After the tensioning is stable, the prestressed steel strand anchoring components are installed to fix the prestressed steel strand so that it does not retract after the tensioning equipment is withdrawn. Specific implementation method six:

[0111] like Figure 1 — Fig.11 As shown, a supporting structure method based on a pipe curtain, said S5 comprises:

[0112] S51: inject cement slurry into the gap between the prestressed steel strand and the prestressed corrugated pipe;

[0113] S52: After the strength of the injected cement slurry reaches the requirement, concrete is poured into the corner pipe section to wrap the prestressed steel strand anchoring components for anchor sealing.

[0114] The working principle and beneficial effects of this embodiment are as follows: Grouting and anchor sealing: Inject cement slurry into the gap between the prestressed steel strand and the prestressed corrugated pipe. After the strength of the injected cement slurry reaches the specified requirements, pour concrete into the corner pipe section to wrap the anchoring components of the prestressed steel strand for anchor sealing; Fill the pipe with concrete: The purpose of filling the pipe is: first, to enhance the strength of the pipe curtain; second, to prevent ground subsidence caused by rust of the steel pipe. Specific implementation method seven:

[0116] like Figure 1 — Fig.11 As shown, a supporting structure method based on a pipe curtain, said S6 comprises:

[0117] S61: C40 slightly expanded fine stone concrete is used for grouting inside the pipe. Grouting is carried out from one end, and the grout outlet is located at the top of the steel pipe at the other end;

[0118] S62: When the slurry flows out of the slurry outlet, close the valve and pressurize to 0.8MPa; when the slurry is initially set and no longer flows, close the curtain pipe outlet and perform secondary grouting, and use plain cement slurry for grouting;

[0119] S63: Channel excavation adopts full-section excavation, the initial lining adopts 56A, and a steel lining is set every 3 meters.

[0120] The working principle and beneficial effects of this embodiment are as follows: Filling the pipe with concrete: The purpose of filling the pipe is: first, to enhance the strength of the pipe curtain; second, to prevent the steel pipe from rusting and causing ground subsidence;

[0121] C40 slightly expanded fine stone concrete is used for grouting inside the pipe. Grouting is carried out from one end, and the grout outlet is set at the top of the steel pipe at the other end. When the slurry flows out of the slurry outlet, the valve is closed and the pressure is increased to 0.8MPa. When the slurry is initially set and no longer flows, the curtain pipe outlet is closed for secondary grouting. Plain cement slurry can be used for grouting.

[0122] Channel excavation and installation of steel lining: Channel excavation adopts full-section excavation, and 56A is used for the initial lining;

[0123] I-beam: The size is 560×166×12.5, and a steel lining is set every 3 meters. Specific implementation eight:

[0125] like Figure 1 — Fig.11 As shown, a supporting structure method based on a pipe curtain, said S7 comprises:

[0126] S71: After the tunnel structure strength reaches the required level, the soil in the tunnel is excavated directly by an excavator or by adding water and pumping out the sludge;

[0127] S72: After the excavation of the channel is completed, the exposed surface will be decorated and renovated, and the road surface can be paved at the same time.

[0128] The working principle and beneficial effects of this embodiment are as follows: earthwork excavation and road paving in the channel; first, after the tunnel structure strength reaches the requirements, the soil in the channel can be excavated directly by an excavator, or by adding water to pump out the sludge;

[0129] The second is the decoration and renovation inside the channel. After the channel is excavated, the exposed surface is decorated and renovated, and the road surface can be paved at the same time. Specific implementation method nine:

[0131] like Figure 1 — Fig.11 As shown, a supporting structure method based on a pipe curtain, the tensioning equipment includes a base 1, a coarse adjustment sliding base 2 is arranged on the base 1 through thread matching adjustment, a fine adjustment sliding base 3 is arranged on the coarse adjustment sliding base 2 through thread matching adjustment, a movable roller rotating seat 4 is fixed on the fine adjustment sliding base 3, and a stretching grinding movable roller 6 is rotatably arranged on the movable roller rotating seat 4;

[0132] A fixed roller frame 20 is fixed on the base 1, and a stretching and grinding fixed roller 8 is rotatably arranged in the fixed roller frame 20, and the stretching and grinding fixed roller 8 and the stretching and grinding movable roller 6 are symmetrically arranged;

[0133] A steel strand adder 18 is provided at the side end of the base 1, and the steel strand adder 18 adds steel strands into the stretching and grinding fixed roller 8 and the stretching and grinding movable roller 6. A plurality of steel strand brakes 16 are fixed on the stretching and grinding fixed roller 8 and the stretching and grinding movable roller 6 for clamping the added steel strands; the steel strands are tensioned by driving the stretching and grinding fixed roller 8 and the stretching and grinding movable roller 6 to rotate.

[0134] The working principle and beneficial effects of this embodiment are as follows: by rotating the coarse adjustment screw shaft 10 on the base 1, the coarse adjustment sliding base 2 is made to slide with the fine adjustment sliding base 3 and the movable roller rotating base 4 through the thread matching and the sliding matching of the sliding rail, so that the stretching grinding movable roller 6 is made to perform coarse adjustment in the transverse direction;

[0135] By rotating the fine adjustment rotating screw shaft 11 on the coarse adjustment sliding base 2, the fine adjustment sliding base 3 drives the movable roller rotating base 4 and the stretching and grinding movable roller 6 to perform fine adjustment in the lateral direction, so as to achieve the adjustment of different positions of the stretching and grinding movable roller 6, thereby facilitating the tensioning of the entire steel strand and adapting to the corresponding surface grinding.

[0136] The detection sliding frame 15 on the movable roller rotating seat 4 is used to conveniently detect or clean the stretching grinding movable roller 6 in combination with different situations. The detection sliding frame 15 includes a sliding screw shaft 13, a detection cleaning frame 14 and a detection cleaning driver 15. The detection cleaning driver 15 is fixed on the movable roller rotating seat 4 to drive the sliding screw shaft 13 to rotate. The sliding screw shaft 13 drives the detection cleaning frame 14 to slide back and forth horizontally on the surface of the stretching grinding movable roller 6 through threaded cooperation. In combination with different usage scenarios, different devices are installed and used on the detection cleaning frame 14, which may include a cleaning device and a limit or frosting detection device for real-time operation and use; the corresponding detection sliding frame 27 is used for the stretching grinding fixed roller 8 in the same way as the detection sliding frame 15;

[0137] The moving roller driver 12 is fixed on the moving roller rotating seat 4 to control and drive the stretching and grinding moving roller 6 to rotate and adjust;

[0138] The fixed roller frame 20 is fixed on the base 1, and a fixed roller driver 21 is fixed on the fixed roller frame 20 to drive the stretching and grinding fixed roller 8 to rotate, and is used in combination with the symmetrical stretching and grinding movable roller 6;

[0139] The stretching and grinding fixed roller 8 and the stretching and grinding movable roller 6 are both provided with a plurality of sockets for plugging in steel strands. After the prestressed steel strands are installed, they are added to the steel strand adder 18. The adding driver 24 and the gear meshing drive the two symmetrical adding rollers 25 to rotate symmetrically. The steel strands are added to the device through the adding semicircular grooves on the symmetrical adding rollers 25. The steel strands are then inserted into the plurality of sockets on the stretching and grinding fixed roller 8 and the stretching and grinding movable roller 6. The brake drive motor 26 is synchronously controlled by the plurality of steel strand brakes 16 on the stretching and grinding fixed roller 8 and the stretching and grinding movable roller 6. The brake drive motor 26 drives the serrated clamping table 19 to slide in the brake clamping seat 17 through the threaded barrel and the screw thread. The serrated clamping The platform 19 tightens the steel strand in the brake clamping seat 17, and increases the friction force through the multiple serrations on the serrated clamping platform 19 to achieve the fixing effect. By driving the stretching and grinding fixed roller 8 and the stretching and grinding movable roller 6 to rotate, it is convenient to carry out reciprocating tensioning, and it is convenient to combine the tension sensor for real-time detection at the first time to avoid unnecessary safety hazards. The main purpose of strand tensioning is to improve the bearing capacity of the structure and improve the overall performance. By tensioning the steel strand, the stress state of the concrete can be changed, and its force-bearing area can be increased, thereby improving the bearing capacity of the beam. At the same time, the concrete structure in the prestressed state has better seismic resistance and crack resistance, and can better control deformation under the action of external force to ensure the overall stability of the structure. Specific implementation method ten:

[0141] like Figure 1 — Fig.11As shown, a supporting structure method based on a pipe curtain, two steel strand adders 18 are respectively arranged at both ends of the base 1, and the two steel strand adders 18 add steel strands or pipe fittings through a support bracket 22, and the support bracket 22 is fixed on a coarse adjustment sliding base 2, and a semicircular groove is arranged on the support bracket 22 for supporting the steel strands or pipe fittings;

[0142] The outer surfaces of the stretching and grinding fixed roller 8 and the stretching and grinding movable roller 6 are both frosted.

[0143] The working principle and beneficial effects of this embodiment are as follows: the steel strand adder 18 can be a fixed liquid that can be slidably adjusted at both ends of the base 1 through bolts, and can be adaptively used in combination with the usage situation. The support bracket 22 is provided to facilitate the support of the corresponding steel strands or pipes to pass through. Combined with the outer surfaces of the stretching and grinding fixed roller 8 and the stretching and grinding movable roller 6, both are frosted, and can be polished and used at the construction site at the first time, thereby effectively ensuring the smooth surface of the construction steel strands or pipes, thereby reducing unnecessary troubles, and can also be used simultaneously with the specific implementation method nine to achieve the effect of combined use.

[0144] The above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention also fall within the protection scope of the present invention.

Claims

1. A supporting structure method based on a pipe curtain, characterized in that: The following steps are involved: S1: Pre-reinforcement of the tunnel floor; Prepare the test tube in advance for water stop and deflection data collection; S2: Mud and water balance pipe jacking: send mud and water to the excavation surface in front of the pipe jacking machine head to prevent mud and water from penetrating into the excavation surface; S3: Prestressing: drilling holes transversely in the pipe body, installing prestressed corrugated pipes in the holes, threading the prestressed steel strands, and pouring concrete in and between the pipe sections in the threading area; S4: tensioning and anchoring: tensioning the prestressed steel strands, installing the prestressed steel strand anchoring components to fix the prestressed steel strands; S5: Grouting and anchor sealing: inject cement slurry and perform anchor sealing treatment; S6: Fill the pipe with concrete, excavate the channel and install the steel lining; S7: Excavation and road paving in the channel.

2. A pipe-roof-based supporting structure method according to claim 1, characterized in that: The S1 includes: S11: Destroy the surrounding soil by adding a pipe body for high-pressure jet cutting; S12: pressurizing and conveying the hardened material slurry, spraying, cutting the formation, mixing, draining mud, and concentrating the mud; S13: Through slurry preparation, slurry spraying, and subsequent slurry discharge and mud water treatment, an engineering construction chain is formed; S14: The construction process can be monitored by monitoring the auxiliary flow and pressure data.

3. A pipe-roof-based supporting structure method according to claim 1, characterized in that: The S2 includes: S21: Mix the mud and water to a set concentration and specific gravity; S22: The mud water is delivered to the excavation surface in front of the pipe jacking machine head through the mud water delivery system, and the mud water forms an impermeable mud film on the excavation surface; S23: By preventing mud and water from penetrating into the excavation surface, the mud and water pressure is adjusted to balance the groundwater pressure and soil pressure; S24: As the pipe jacking machine head moves forward, the cutter disc cuts the soil. The cut residual soil is fully mixed with mud and water, and then transported by the mud discharge system to the ground mud and water separation equipment for treatment. The separated residual soil is transported away, and the mud and water are sent to the water supply system for recycling.

4. A pipe-roof-based supporting structure method according to claim 1, characterized in that: The S3 includes: S31: Use a laser cutting machine to make horizontal holes in the tube body; S32: installing a prestressed corrugated pipe in the through hole of the prestressed steel strand, and then threading the prestressed steel strand; S33: After the prestressed steel strands are bundled, pour concrete in and between the pipe sections in the bundle-threading area.

5. A pipe-roof-based supporting structure method according to claim 1, characterized in that: The S4 includes: S41: After the concrete strength reaches the required level, prestressed steel strands are tensioned; S42: After the tensioning is stable, install the prestressed steel strand anchoring components to fix the prestressed steel strands so that they do not retract after the tensioning equipment is withdrawn.

6. A pipe-roof-based supporting structure method according to claim 1, characterized in that: The S5 includes: S51: inject cement slurry into the gap between the prestressed steel strand and the prestressed corrugated pipe; S52: After the strength of the injected cement slurry reaches the requirement, concrete is poured into the corner pipe section to wrap the prestressed steel strand anchoring components for anchor sealing.

7. A pipe-roof-based supporting structure method according to claim 1, characterized in that: The S6 includes: S61: C40 slightly expanded fine stone concrete is used for grouting inside the pipe. Grouting is carried out from one end, and the grout outlet is located at the top of the steel pipe at the other end; S62: When the slurry flows out of the slurry outlet, close the valve and pressurize to 0.8MPa; when the slurry is initially set and no longer flows, close the curtain pipe outlet and perform secondary grouting, and use plain cement slurry for grouting; S63: Channel excavation adopts full-section excavation, the initial lining adopts 56A, and a steel lining is set every 3 meters.

8. The method for supporting a pipe-roof structure according to claim 1, characterized in that: The S7 comprises: S71: After the tunnel structure strength reaches the required level, the soil in the tunnel is excavated directly by an excavator or by adding water and pumping out the sludge; S72: After the excavation of the channel is completed, the exposed surface will be decorated and renovated, and the road surface can be paved at the same time.

9. A pipe-roof-based supporting structure method according to claim 5, characterized in that: The tensioning device comprises a base (1), a coarse adjustment sliding base (2) is arranged on the base (1) through threaded matching adjustment, a fine adjustment sliding base (3) is arranged on the coarse adjustment sliding base (2) through threaded matching adjustment, a movable roller rotating seat (4) is fixed on the fine adjustment sliding base (3), and a stretching grinding movable roller (6) is rotatably arranged on the movable roller rotating seat (4); A fixed roller frame (20) is fixed on the base (1), a stretching and grinding fixed roller (8) is rotatably arranged inside the fixed roller frame (20), and the stretching and grinding fixed roller (8) and the stretching and grinding movable roller (6) are symmetrically arranged; A steel strand adder (18) is provided at the side end of the base (1), and the steel strand adder (18) adds steel strands into the stretching and grinding fixed roller (8) and the stretching and grinding movable roller (6). A plurality of steel strand brakes (16) are fixed on the stretching and grinding fixed roller (8) and the stretching and grinding movable roller (6) for clamping the added steel strands; the steel strands are tensioned by driving the stretching and grinding fixed roller (8) and the stretching and grinding movable roller (6) to rotate.

10. A pipe-roof-based supporting structure method according to claim 9, characterized in that: Two steel strand adders (18) are respectively arranged at both ends of the base (1), and the two steel strand adders (18) add steel strands or pipe fittings through a support bracket (22). The support bracket (22) is fixed on the coarse adjustment sliding base (2), and a semicircular groove is arranged on the support bracket (22) for supporting the steel strands or pipe fittings; The outer surfaces of the stretching and grinding fixed roller (8) and the stretching and grinding movable roller (6) are both frosted.

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