Grouting raw material of prefabricated inverted arch, preparation method of grouting raw material, prefabricated inverted arch foundation device and construction method of prefabricated inverted arch foundation device

Abstract

A grouting raw material of a prefabricated inverted arch, a preparation method, a prefabricated inverted arch foundation device and a construction method, the grouting raw material comprises a paving layer (40) arranged on the bottom inner wall of a high-speed tunnel, a prefabricated inverted arch assembly (20) arranged on the paving layer (40), a pipeline group arranged on the prefabricated inverted arch assembly (20), and a grouting layer (70) arranged between the paving layer (40) and the prefabricated inverted arch assembly (20), the prefabricated inverted arch foundation device is assembled through the paving layer (40) and the prefabricated inverted arch assembly (20), mortar condensation body supporting on the prefabricated inverted arch assembly (20) is achieved through the grouting layer (70), pipeline injection of grouting of the prefabricated inverted arch is achieved through the pipeline set, filling supporting through self-flowing thick slurry is achieved, and the prefabricated inverted arch foundation device is assembled through the pipeline set. The technical problem that grouting is conducted after cushion blocks are placed at the lower ends of the prefabricated inverted arch assemblies is solved, and therefore the construction efficiency of the prefabricated inverted arch foundation device is improved.

Description

Technical Field

[0001] The invention relates to a grouting material and a preparation method of a prefabricated invert, a prefabricated invert foundation device and a construction method, in particular to a grouting material and a preparation method of a prefabricated invert suitable for a high-speed tunnel, a prefabricated invert foundation device and a construction method. Background Art

[0002] In order to improve the construction efficiency of high-speed tunnels, in accordance with geological conditions, the high-speed tunnel pavement support body is obtained by assembling the arch support assembly and the prefabricated inverted arch assembly. Therefore, the prefabricated inverted arch foundation device is an important high-speed tunnel component. In existing high-speed tunnels, a pad is first placed at the lower end of the prefabricated inverted arch assembly and then grouting is performed. In order to ensure the flatness of the prefabricated inverted arch assembly, the height of the pad needs to be adjusted, which affects the construction efficiency of the prefabricated inverted arch foundation device. The present invention uses the technical feature of using a self-flowing slurry to fill and support, and effectively explores and studies the technical problem of first placing a pad at the lower end of a prefabricated invert assembly and then grouting. The statements here only provide background technology related to the present invention and do not necessarily constitute prior art. The technical solution of the present invention is made based on the technical briefing document provided by the applicant on April 18, 2024, which solves actual technical problems in the work process, and the existing technical problems, technical features and technical effects in the similar patent literature and background technology obtained through retrieval. Summary of the invention

[0003] The object of the present invention is a grouting material for a prefabricated invert. The object of the present invention is a method for preparing grouting raw materials for a prefabricated invert. The object of the present invention is a prefabricated invert foundation device, The object of the present invention is a construction method of a prefabricated invert foundation device.

[0004] In order to overcome the above technical disadvantages, the purpose of the present invention is to provide a grouting material and a preparation method for a prefabricated inverted arch, a prefabricated inverted arch foundation device and a construction method, thereby improving the construction efficiency of the prefabricated inverted arch foundation device.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a prefabricated invert arch foundation device, comprising a paving layer arranged on the bottom inner wall of the high-speed tunnel, a prefabricated invert arch assembly arranged on the paving layer, a pipeline group arranged on the prefabricated invert arch assembly, and a grouting layer arranged between the paving layer and the prefabricated invert arch assembly.

[0006] Due to the design of the paving layer, prefabricated inverted arch assembly, pipe group and grouting layer, the prefabricated inverted arch foundation device is assembled through the paving layer and the prefabricated inverted arch assembly, the mortar condensate support of the prefabricated inverted arch assembly is achieved through the grouting layer, the grouting of the prefabricated inverted arch is injected through the pipe group, and the filling and support by the self-flowing slurry is achieved, which solves the technical problem of placing a pad at the lower end of the prefabricated inverted arch assembly and then grouting, thereby improving the construction efficiency of the prefabricated inverted arch foundation device.

[0007] The present invention is designed to connect the paving layer, the prefabricated inverted arch assembly, the pipeline group and the grouting layer to each other in a manner of filling and supporting by a self-flowing slurry viscous body.

[0008] The present invention is designed to connect the pipeline group and the grouting layer with the paving layer and the prefabricated inverted arch assembly in a manner of supporting the mortar aggregate.

[0009] The present invention designs that the pipeline group is configured to include a grouting pipe and an exhaust pipe.

[0010] The technical effect of the above technical solution is: realizing the operation of filling the grouting layer between the prefabricated inverted arch assembly and the paving layer, and realizing the horizontal state support of the self-flowing slurry of the prefabricated inverted arch assembly.

[0011] The present invention is designed that a grouting pipe and an exhaust pipe are respectively arranged in the prefabricated inverted arch assembly, and a grouting layer is arranged between the prefabricated inverted arch assembly and the paving layer.

[0012] The technical effect of the above technical solution is that the basic technical solution of the present invention is formed by prefabricated inverted arch components, paving layers, grouting pipes, exhaust pipes and grouting layers, thus solving the technical problems of the present invention.

[0013] The present invention designs that the paving layer is arranged as a C-shaped concrete mortar layer, the outer side surface of the paving layer is arranged to be connected to the grouting layer, and the inner side surface of the paving layer is arranged to be connected to the bottom inner wall of the high-speed tunnel.

[0014] The present invention is designed that step surface bodies are arranged on the left and right end surface parts of the inverted arch part of the prefabricated inverted arch assembly and a reserved hole body is arranged in the inverted arch part, a receiving groove body is arranged on the inner side surface part of the inverted arch part and the inner side surface part of the inverted arch part is arranged to be connected with the grouting layer, the inverted arch part is arranged to be respectively connected with the grouting pipe and the exhaust pipe in a receiving manner and the step surface body is arranged to be connected with the upper end part of the grouting pipe, the end head of the receiving groove body is arranged to be connected with the lower end part of the grouting pipe and the middle part of the receiving groove body is arranged to be connected with the lower end part of the exhaust pipe, the inner wall of the reserved hole body is arranged to be connected with the upper end part of the exhaust pipe and the inverted arch part is arranged as a block body with an arc surface on the lower end face, the step surface body is arranged as an L-shaped end head body and the reserved hole body is arranged as a circular hole, the receiving groove body is arranged as a U-shaped groove body and the reserved hole bodies are arranged to be arranged and distributed along the horizontal center line and the vertical center line of the inverted arch part, and the receiving groove body is arranged to be arranged and distributed along the longitudinal center line and the vertical center line of the inverted arch part.

[0015] The technical effects of the above two technical solutions are: realizing a prefabricated invert foundation device composed of a double-layer body, and realizing grouting and diversion release of the prefabricated invert by the containing trough body.

[0016] The present invention is designed that the grouting layer is arranged as the grouting solidification layer body of the prefabricated inverted arch and the grouting layers are arranged to be distributed corresponding to the grouting pipe and the exhaust pipe respectively, one of the side portions of the grouting layer is arranged to be connected to the prefabricated inverted arch assembly and another side portion of the grouting layer is arranged to be connected to the paving layer.

[0017] The technical effect of the above technical solution is: it realizes the conversion from grouting of the prefabricated invert to self-flowing slurry support.

[0018] The present invention is designed that the grouting pipe and the exhaust pipe are respectively arranged as cylindrical bodies and the grouting pipe and the exhaust pipe are respectively arranged to be embeddedly connected with the prefabricated inverted arch assembly, the upper port portion of the grouting pipe is arranged on the upper end surface portion of the prefabricated inverted arch assembly and the upper port portion of the exhaust pipe is arranged in the prefabricated inverted arch assembly, the lower port portion of the grouting pipe and the lower port portion of the exhaust pipe are respectively arranged on the lower end surface portion of the prefabricated inverted arch assembly and the lower port portion of the grouting pipe and the lower port portion of the exhaust pipe are respectively arranged to be distributed corresponding to the grouting layer.

[0019] The present invention designs that the grouting pipe is arranged to include a pipe part I and a pipe part II, wherein the pipe part I is arranged on the left end face portion of the prefabricated inverted arch assembly, and the pipe part II is arranged on the right end face portion of the prefabricated inverted arch assembly.

[0020] The technical effects of the above two technical solutions are: realizing the double-channel material injection at the edge and the intermediate exhaust setting, and accelerating the grouting speed of the prefabricated invert.

[0021] The present invention designs that the prefabricated inverted arch assembly and the paving layer are arranged to be distributed in a manner of supporting by fluid condensation as well as the grouting pipe, the exhaust pipe and the grouting layer.

[0022] The present invention is designed such that the center line of the prefabricated inverted arch assembly, the center line of the paving layer and the center line of the grouting layer are arranged on the same straight line, the pipe part I is arranged between the step surface body located at the left end face and the left end head of the containing trough body, and the pipe part II is arranged between the step surface body located at the right end face and the right end head of the containing trough body.

[0023] The present invention designs a construction method for a prefabricated inverted arch foundation device, and the steps are: assembling the prefabricated inverted arch foundation device by a paving layer and a prefabricated inverted arch component, supporting the prefabricated inverted arch component with a mortar condensate by a grouting layer, injecting grouting into the prefabricated inverted arch by a pipeline group, and filling and supporting by a self-flowing slurry viscosity.

[0024] The technical effect of the above technical solution is: highlighting the technical feature of filling and supporting by self-flowing slurry, and introducing the application in the technical field of construction method of prefabricated invert foundation device.

[0025] The present invention is designed, and its steps are: spreading the raw materials of the paving layer on the bottom inner wall of the high-speed tunnel, waiting for the raw materials of the paving layer to solidify, obtaining the paving layer on the bottom inner wall of the high-speed tunnel, marking the installation position of the prefabricated inverted arch assembly on the paving layer, placing the prefabricated inverted arch assembly on the installation position of the prefabricated inverted arch assembly by a hoisting machine, when the height of the prefabricated inverted arch assembly is greater than a predetermined height, performing a weighting treatment on the inverted arch part so that the height of the prefabricated inverted arch assembly is equal to the predetermined height, and when the height of the prefabricated inverted arch assembly is less than the predetermined height, placing the prefabricated inverted arch assembly on the installation position of the prefabricated inverted arch assembly. The grouting of the prefabricated invert is injected through pipe part I and pipe part II, and the grouting of the prefabricated invert is released between the invert part and the paving layer through pipe part I, pipe part II and the containing trough. When the height of the prefabricated invert assembly is equal to the predetermined height, the grouting of the prefabricated invert is stopped, and the invert part is connected with the bolts embedded in the high-speed tunnel through nuts. The grouting of the prefabricated invert is injected through pipe part I and pipe part II under the pressurized state, and the invert part is reinforced and connected again. After the grouting of the prefabricated invert is solidified, a grouting layer is obtained between the invert part and the paving layer.

[0026] The technical effect of the above technical solution is that: the support and leveling operation of the prefabricated inverted arch assembly is realized under the support state of the grouting of the prefabricated inverted arch.

[0027] The invention designs a grouting raw material for a prefabricated invert, which comprises redispersible latex powder, desulfurized gypsum, cement and steel slag powder.

[0028] The invention is designed to contain, according to weight proportion: 10-15 parts of redispersible latex powder, 15-19 parts of desulfurized gypsum, 20-22 parts of cement and 30-35 parts of steel slag powder.

[0029] The present invention is designed that the redispersible latex powder is set as fine particles obtained by spray drying a polymer emulsion of vinyl acetate and acrylic acid, the desulfurized gypsum is set as desulfurized gypsum powder, the cement is set as 425 silicate cement, and the steel slag powder is set as 120-180 mesh steel slag powder.

[0030] The technical effects of the above three technical solutions are: realizing the setting of self-flowing filling material under high-strength support state.

[0031] The invention discloses a method for preparing grouting raw materials for a prefabricated inverted arch. The method comprises the following steps: heating 30-35 parts of steel slag powder to 600-650°C in a heating axe, sprinkling 15-19 parts of desulfurized gypsum into the heating axe, mixing 30-35 parts of steel slag powder and 15-19 parts of desulfurized gypsum, taking out the mixture of 30-35 parts of steel slag powder and 15-19 parts of desulfurized gypsum from the heating axe, and obtaining a grouting raw material medium after cooling to room temperature; when the grouting raw materials for the prefabricated inverted arch need to be prepared, putting 20-22 parts of cement and 10-15 parts of redispersible latex powder into a mixer, stirring and mixing for 10-30 minutes, adding a proper amount of water, stirring and mixing to obtain a grouting raw material medium liquid, putting the grouting raw material medium into the grouting raw material medium liquid, stirring and mixing for 5-8 minutes, and obtaining grouting of the prefabricated inverted arch.

[0032] The technical effect of the above technical solution is: realizing the grouting of the prefabricated invert by wrapping the steel slag powder with desulfurized gypsum and mixing the cement and redispersible latex powder.

[0033] In the present technical solution, the prefabricated inverted arch assembly, paving layer and grouting layer are basic components and are also the necessary technical features of the present invention. The grouting pipe and exhaust pipe are functional components and are the features for realizing other technical effects of the present invention. The design of the inverted arch part, step surface body, reserved hole body, receiving trough body, pipe part I and pipe part II are technical features that comply with the Patent Law and its implementing rules.

[0034] In the technical solution, the self-flowing slurry viscous body for filling and supporting is realized by a grouting layer, and the grouting of the prefabricated invert refers to the raw material of the grouting layer.

[0035] In the present technical scheme, the paving layer, prefabricated invert assembly, pipeline group and grouting layer filled and supported by self-flowing slurry are important technical features. In the technical field of grouting raw materials and preparation methods of prefabricated invert, prefabricated invert foundation device and construction method of prefabricated invert, it has novelty, creativity and practicality. The terms in the present technical scheme can be explained and understood using patent documents in this technical field. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 is a schematic diagram of a prefabricated invert foundation device according to the present invention, Figure 2 Schematic diagram of the distribution relationship between the grouting pipe 50 and the exhaust pipe 60. Prefabricated inverted arch assembly-20, paving layer-40, grouting pipe-50, exhaust pipe-60, grouting layer-70, inverted arch part-201, step surface body-202, reserved hole body-203, containing trough body-204, pipe part I-501, pipe part II-502. DETAILED DESCRIPTION

[0038] According to the Examination Guidelines, terms such as “having”, “including” and “comprising” used in the present invention should be understood as not dispensing with the existence or addition of one or more other elements or their combinations.

[0039] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention 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 limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0040] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other. In addition, unless otherwise specified, the equipment and materials used in the following examples are commercially available. If the processing conditions are not clearly stated, please refer to the purchased product manual or proceed according to conventional methods in the art.

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] A grouting material for a prefabricated invert. Figure 1 This is the first embodiment of the present invention, which is specifically described in conjunction with the accompanying drawings. According to the weight ratio, it contains 10-15 parts of redispersible latex powder, 15-19 parts of desulfurized gypsum, 20-22 parts of cement and 30-35 parts of steel slag powder.

[0044] In this embodiment, the redispersible latex powder is set to be fine particles obtained by spray drying a polymer emulsion of vinyl acetate and acrylic acid, the desulfurized gypsum is set to be desulfurized gypsum powder, the cement is set to be 425 silicate cement, and the steel slag powder is set to be 120-180 mesh steel slag powder.

[0045] One of the supporting examples of the first embodiment of the present invention comprises, in weight proportion: 10 parts of redispersible latex powder, 15 parts of desulfurized gypsum, 20 parts of cement and 30 parts of steel slag powder.

[0046] In this embodiment, the steel slag powder is set to 120 mesh steel slag powder.

[0047] The second supporting example of the first embodiment of the present invention comprises, by weight, 15 parts of redispersible latex powder, 19 parts of desulfurized gypsum, 22 parts of cement and 35 parts of steel slag powder.

[0048] In this embodiment, the steel slag powder is set to 180 mesh steel slag powder.

[0049] The third supporting example of the first embodiment of the present invention comprises, by weight, 13 parts of redispersible latex powder, 17 parts of desulfurized gypsum, 21 parts of cement and 33 parts of steel slag powder.

[0050] In this embodiment, the steel slag powder is set to 150 mesh steel slag powder.

[0051] The present invention is further described below in conjunction with examples. The following examples are intended to illustrate the present invention rather than to further limit the present invention.

[0052] A method for preparing grouting raw materials for a prefabricated inverted arch, a first embodiment of the present invention, comprising the following steps: heating 30-35 parts of steel slag powder to 600-650°C in a heating axe, sprinkling 15-19 parts of desulfurized gypsum into the heating axe, then mixing 30-35 parts of steel slag powder and 15-19 parts of desulfurized gypsum, taking out the mixture of 30-35 parts of steel slag powder and 15-19 parts of desulfurized gypsum from the heating axe, and obtaining a grouting raw material medium after cooling to room temperature; when it is necessary to prepare the grouting raw materials for the prefabricated inverted arch, putting 20-22 parts of cement and 10-15 parts of redispersible latex powder into a mixer and stirring and mixing for 10-30 minutes, adding an appropriate amount of water and stirring and mixing to obtain a grouting raw material medium liquid, putting the grouting raw material medium into the grouting raw material medium liquid, stirring and mixing for 5-8 minutes, and obtaining grouting for the prefabricated inverted arch.

[0053] One of the supporting examples of the first embodiment of the present invention comprises the following steps: heating 30 parts of steel slag powder to 600°C in a heating axe, sprinkling 15 parts of desulfurized gypsum into the heating axe, and then mixing 30 parts of steel slag powder and 15 parts of desulfurized gypsum, taking out the mixture of 30 parts of steel slag powder and 15 parts of desulfurized gypsum from the heating axe, and obtaining a grouting raw material medium after cooling to room temperature. When it is necessary to prepare the grouting raw material for the prefabricated invert arch, 20 parts of cement and 10 parts of redispersible latex powder are put into a mixer and stirred for 10 minutes, an appropriate amount of water is added and stirred to obtain a grouting raw material medium liquid, and the grouting raw material medium is put into the grouting raw material medium liquid, and stirred for 5 minutes to obtain the grouting of the prefabricated invert arch.

[0054] The second supporting example of the first embodiment of the present invention comprises the following steps: heating 35 parts of steel slag powder to 650°C in a heating axe, sprinkling 19 parts of desulfurized gypsum into the heating axe, and then mixing 35 parts of steel slag powder and 19 parts of desulfurized gypsum, taking out the mixture of 35 parts of steel slag powder and 19 parts of desulfurized gypsum from the heating axe, and obtaining a grouting raw material medium after cooling to room temperature. When the grouting raw material for the prefabricated invert arch needs to be prepared, 22 parts of cement and 15 parts of redispersible latex powder are put into a mixer and stirred for 30 minutes, and an appropriate amount of water is added for stirring and mixing to obtain a grouting raw material medium liquid, and the grouting raw material medium is put into the grouting raw material medium liquid, and stirred and mixed for 8 minutes to obtain the grouting of the prefabricated invert arch.

[0055] The third supporting example of the first embodiment of the present invention comprises the following steps: heating 33 parts of steel slag powder to 630°C in a heating axe, sprinkling 17 parts of desulfurized gypsum into the heating axe, and then mixing 33 parts of steel slag powder and 17 parts of desulfurized gypsum, taking out the mixture of 33 parts of steel slag powder and 17 parts of desulfurized gypsum from the heating axe, and obtaining a grouting raw material medium after cooling to room temperature. When the grouting raw material for the prefabricated invert arch needs to be prepared, 21 parts of cement and 13 parts of redispersible latex powder are put into a mixer and stirred for 20 minutes, an appropriate amount of water is added and stirred to obtain a grouting raw material medium liquid, and the grouting raw material medium is put into the grouting raw material medium liquid, and stirred for 7 minutes to obtain the grouting of the prefabricated invert arch.

[0056] A prefabricated invert foundation device, Figure 1 This is the first embodiment of the present invention, which is specifically described in conjunction with the accompanying drawings. It includes a prefabricated inverted arch assembly 20, a paving layer 40, a grouting pipe 50, an exhaust pipe 60 and a grouting layer 70, and the grouting pipe 50 and the exhaust pipe 60 are respectively arranged in the prefabricated inverted arch assembly 20, and the grouting layer 70 is arranged between the prefabricated inverted arch assembly 20 and the paving layer 40.

[0057] In this embodiment, the paving layer 40 is configured as a C-shaped concrete mortar layer and the outer side surface of the paving layer 40 is configured to be connected to the grouting layer 70, and the inner side surface of the paving layer 40 is configured to be connected to the bottom inner wall of the high-speed tunnel.

[0058] A supporting connection point for the grouting layer 70 is formed through the paving layer 40 , and the connection with the grouting layer 70 is achieved through the paving layer 40 . The technical purpose is to serve as a supporting carrier for the grouting layer 70 .

[0059] In this embodiment, stepped bodies 202 are provided on the left and right end faces of the invert portion 201 of the precast invert assembly 20, and a reserved hole body 203 is provided in the invert portion 201. A receiving groove body 204 is provided on the inner face of the invert portion 201, and the inner face of the invert portion 201 is arranged to be connected to the grouting layer 70. The invert portion 201 is respectively arranged to be in a receiving connection with the grouting pipe 50 and the exhaust pipe 60, and the stepped body 202 is arranged to be connected to the upper port portion of the grouting pipe 50. The end of the receiving groove body 204 is arranged to be connected to the lower port portion of the grouting pipe 50, and the middle portion of the receiving groove body 204 is arranged to be connected to the lower port portion of the exhaust pipe 60. The inner wall of the reserved hole body 203 is arranged to be connected to the upper port portion of the exhaust pipe 60, and the invert portion 201 is arranged to be a块状 body with an arc-shaped face at the lower end face. The stepped body 202 is arranged to be an L-shaped end body, and the reserved hole body 203 is arranged to be a circular hole. The receiving groove body 204 is arranged to be a匚-shaped groove body, and the reserved hole body 203 is arranged to be arranged at intervals along the transverse center line and the vertical center line of the invert portion 201. The receiving groove body 204 is arranged to be arranged at intervals along the longitudinal center line and the vertical center line of the invert portion 201.

[0060] Through the precast invert assembly 20, support connection points for the grouting pipe 50, the exhaust pipe 60, and the grouting layer 70 are formed. The connection with the grouting pipe 50 is realized by the invert portion 201, the stepped body 202, and the receiving groove body 204. The connection with the exhaust pipe 60 is realized by the invert portion 201, the reserved hole body 203, and the receiving groove body 204. The connection with the grouting layer 70 is realized by the invert portion 201. Its technical purpose is to be used as a component for supporting the bottom of a high-speed tunnel.

[0061] In this embodiment, the grouting pipe 50 and the exhaust pipe 60 are respectively arranged to be cylindrical bodies, and the grouting pipe 50 and the exhaust pipe 60 are respectively arranged to be in an embedded connection with the precast invert assembly 20. The upper port portion of the grouting pipe 50 is arranged on the upper end face of the precast invert assembly 20, and the upper port portion of the exhaust pipe 60 is arranged in the precast invert assembly 20. The lower port portions of the grouting pipe 50 and the exhaust pipe 60 are respectively arranged on the lower end face of the precast invert assembly 20, and the lower port portions of the grouting pipe 50 and the exhaust pipe 60 are respectively arranged to be distributed corresponding to the grouting layer 70.

[0062] Through the grouting pipe 50 and the exhaust pipe 60, support connection points for the precast invert assembly 20 and the grouting layer 70 are formed. The connection with the precast invert assembly 20 is realized by the grouting pipe 50 and the exhaust pipe 60, and the connection with the grouting layer 70 is realized. Its technical purpose is to be used as a component for making the grouting layer 70 on the inner face of the precast invert assembly 20.

[0063] In this embodiment, the grouting pipe 50 is configured to include a pipe portion I 501 and a pipe portion II 502 , and the pipe portion I 501 is disposed on the left end surface portion of the prefabricated inverted arch assembly 20 , and the pipe portion II 502 is disposed on the right end surface portion of the prefabricated inverted arch assembly 20 .

[0064] The technical purpose of the invention is to be used for double-channel grouting in the prefabricated invert assembly 20 .

[0065] In this embodiment, the grouting layer 70 is set as the grouting solidification layer of the prefabricated inverted arch and the grouting layer 70 is respectively set to be distributed corresponding to the grouting pipe 50 and the exhaust pipe 60, one of the side portions of the grouting layer 70 is set to be connected to the prefabricated inverted arch assembly 20 and another side portion of the grouting layer 70 is set to be connected to the paving layer 40.

[0066] The grouting layer 70 forms supporting connection points for the prefabricated inverted arch assembly 20, the paving layer 40, the grouting pipe 50 and the exhaust pipe 60. The grouting layer 70 realizes connection with the prefabricated inverted arch assembly 20, connection with the paving layer 40, connection with the grouting pipe 50 and connection with the exhaust pipe 60. The technical purpose is to serve as a supporting carrier for the prefabricated inverted arch assembly 20.

[0067] In this embodiment, the prefabricated inverted arch assembly 20 and the paving layer 40 are arranged to be distributed in a manner supported by fluid condensation, and the center line of the prefabricated inverted arch assembly 20, the center line of the paving layer 40 and the center line of the grouting layer 70 are arranged on the same straight line, the pipe portion I 501 is arranged between the step surface body 202 located on the left end face and the left end head of the receiving trough body 204, and the pipe portion II 502 is arranged between the step surface body 202 located on the right end face and the right end head of the receiving trough body 204.

[0068] The present invention is further described below in conjunction with examples. The following examples are intended to illustrate the present invention rather than to further limit the present invention.

[0069] A construction method for a prefabricated inverted arch foundation device, the steps of which are: paving the raw materials of a paving layer 40 on the bottom inner wall of a high-speed tunnel, and obtaining the paving layer 40 on the bottom inner wall of the high-speed tunnel after the raw materials of the paving layer 40 are solidified, marking the installation position of the prefabricated inverted arch assembly 20 on the paving layer 40, placing the prefabricated inverted arch assembly 20 on the installation position of the prefabricated inverted arch assembly 20 by a hoisting machine, and when the height of the prefabricated inverted arch assembly 20 is greater than a predetermined height, performing a weighting treatment on the inverted arch portion 201 to make the height of the prefabricated inverted arch assembly 20 equal to the predetermined height, and when the height of the prefabricated inverted arch assembly 20 is less than the predetermined height, grouting the prefabricated inverted arch through The pipe part I 501 and the pipe part II 502 are filled, and the grouting of the prefabricated invert is released between the invert part 201 and the paving layer 40 through the pipe part I 501, the pipe part II 502 and the containing tank body 204. When the height of the prefabricated invert assembly 20 is equal to the predetermined height, the grouting of the prefabricated invert is stopped, and the invert part 201 is connected with the bolts pre-buried in the high-speed tunnel through nuts. The grouting of the prefabricated invert is then filled through the pipe part I 501 and the pipe part II 502 under the pressurized state, and the invert part 201 is reinforced and connected. After the grouting of the prefabricated invert is solidified, a grouting layer 70 is obtained between the invert part 201 and the paving layer 40.

[0070] When verifying the present invention, the inventors abandoned the prior art feature of first placing a pad at the lower end of the prefabricated inverted arch assembly and then performing grouting, and first proposed a technical feature of filling and supporting with a self-flowing slurry, thereby obtaining a first unexpected technical effect: achieving support by the grouting layer 70 between the paving layer 40 and the prefabricated inverted arch assembly 20, simplifying the installation procedure of the prefabricated inverted arch assembly 20, and obtaining a second unexpected technical effect: optimizing the space setting between the paving layer 40 and the prefabricated inverted arch assembly 20, lowering the installation center of gravity of the prefabricated inverted arch assembly 20, and obtaining a third unexpected technical effect: achieving increased support area for the prefabricated inverted arch assembly 20 by the grouting layer 70, and improving the stability of the prefabricated inverted arch assembly 20, and obtaining a fourth unexpected technical effect: achieving a self-flowing mixture as the raw material of the grouting layer 70, and improving the paving performance of the grouting layer 70, and obtaining a fifth unexpected technical effect: achieving improved support strength of the grouting layer 70 by steel slag powder.

[0071] In the second embodiment of the present invention, the paving layer 40, the prefabricated invert assembly 20, the pipe group and the grouting layer 70 are connected to each other in a manner of being filled and supported by a self-flowing slurry.

[0072] In this embodiment, the pipe group and the grouting layer 70 are connected to the paving layer 40 and the prefabricated invert arch assembly 20 in a manner to support the mortar set body.

[0073] In this embodiment, the pipeline group is configured to include a grouting pipe 50 and an exhaust pipe 60 .

[0074] The second embodiment of the present invention is based on the first embodiment. The second embodiment of the present invention comprises the following steps: assembling the prefabricated inverted arch foundation device by the paving layer 40 and the prefabricated inverted arch assembly 20, supporting the prefabricated inverted arch assembly 20 with mortar solidification body by the grouting layer 70, injecting the grouting of the prefabricated inverted arch by the pipeline group, and filling and supporting by the self-flowing slurry.

[0075] The second embodiment of the present invention is based on the first embodiment.

[0076] The present invention has the following characteristics: 1. Due to the design of the paving layer 40, the prefabricated inverted arch assembly 20, the pipeline group and the grouting layer 70, the prefabricated inverted arch foundation device is assembled through the paving layer 40 and the prefabricated inverted arch assembly 20, the mortar condensate support of the prefabricated inverted arch assembly 20 is achieved through the grouting layer 70, and the grouting of the prefabricated inverted arch is injected through the pipeline group, and the filling and support by the self-flowing slurry is achieved, which solves the technical problem of placing a cushion block at the lower end of the prefabricated inverted arch assembly and then grouting, thereby improving the construction efficiency of the prefabricated inverted arch foundation device.

[0077] 2. Due to the design of the receiving tank 204, the grouting of the prefabricated invert can be accommodated and diverted.

[0078] 3. Due to the design of the grouting pipe 50 and the exhaust pipe 60, the grouting of the prefabricated invert is realized.

[0079] 4. Since the design limits the numerical range of the structural shape, the numerical range is the technical feature in the technical solution of the present invention, rather than a technical feature calculated by a formula or obtained through a limited number of tests. Tests have shown that the technical feature of this numerical range has achieved good technical effects.

[0080] 5. Due to the design of the technical features of the present invention, the effects of the individual and combined technical features have been shown through experiments to have various performance indicators of the present invention that are at least 1.7 times the existing performance indicators, and have been evaluated to have good market value.

[0081] There are other technical features connected with the paving layer 40 filled and supported by the self-flowing slurry, the prefabricated arch assembly 20, the pipeline group and the grouting layer 70, which are all embodiments of the present invention, and the technical features of the above-mentioned embodiments can be combined arbitrarily. In order to meet the requirements of the Patent Law, the Patent Implementing Rules and the Examination Guidelines, all possible combinations of the technical features in the above-mentioned embodiments will no longer be described.

[0082] The above embodiment is only one implementation form of the grouting materials and preparation method of the prefabricated inverted arch, the prefabricated inverted arch foundation device and the construction method provided by the present invention. Other variations of the scheme provided by the present invention, adding or reducing the components or steps therein, or applying the present invention to other technical fields close to the present invention, all fall within the protection scope of the present invention.

Claims

1. A prefabricated invert foundation device, characterized in that: It includes a paving layer (40) provided on the bottom inner wall of a high-speed tunnel, a precast inverted arch assembly (20) provided on the paving layer (40), a pipeline group provided on the precast inverted arch assembly (20), and a grouting layer (70) provided between the paving layer (40) and the precast inverted arch assembly (20).

2. The prefabricated invert foundation device according to claim 1, characterized in that: The paving layer (40), the precast inverted arch assembly (20), the pipeline group and the grouting layer (70) are interconnected in a manner of being filled and supported by a self-flowing slurry paste.

3. The prefabricated invert foundation device according to claim 2, characterized in that: The pipeline group and the grouting layer (70) are connected to the paving layer (40) and the precast inverted arch assembly (20) in a manner of being supported by a mortar solidified body.

4. The prefabricated invert foundation device according to claim 1, characterized in that: The pipeline group is set to include a grouting pipe (50) and an exhaust pipe (60).

5. The prefabricated invert foundation device according to claim 4 is characterized in that: The grouting pipe (50) and the exhaust pipe (60) are respectively provided in the precast inverted arch assembly (20), and the grouting layer (70) is provided between the precast inverted arch assembly (20) and the paving layer (40).

6. The prefabricated invert foundation device according to claim 5, characterized in that: The paving layer (40) is set as a C-shaped concrete mortar layer, and the outer side surface of the paving layer (40) is set to be connected to the grouting layer (70), and the inner side surface of the paving layer (40) is set to be connected to the bottom inner wall of the high-speed tunnel. Or, step-shaped bodies (202) are provided on the left and right end faces of the inverted arch part (201) of the precast inverted arch assembly (20), and reserved hole bodies (203) are provided in the inverted arch part (201). A receiving groove body (204) is provided on the inner side surface of the inverted arch part (201), and the inner side surface of the inverted arch part (201) is set to be connected to the grouting layer (70). The inverted arch part (201) is respectively set to be connected to the grouting pipe (50) and the exhaust pipe (60) in a receiving manner, and the step-shaped body (202) is set to be connected to the upper port part of the grouting pipe (50). The end of the receiving groove body (204) is set to be connected to the lower port part of the grouting pipe (50), and the middle part of the receiving groove body (204) is set to be connected to the lower port part of the exhaust pipe (60). The inner wall of the reserved hole body (203) is set to be connected to the upper port part of the exhaust pipe (60), and the inverted arch part (201) is set to be a block body with an arc-shaped surface at the lower end face. The step-shaped body (202) is set to be an L-shaped end body, and the reserved hole body (203) is set to be a circular hole. The receiving groove body (204) is set to be a U-shaped groove body, and the reserved hole bodies (203) are set to be arranged at intervals along the transverse center line and the vertical center line of the inverted arch part (201). The receiving groove body (204) is set to be arranged at intervals along the longitudinal center line and the vertical center line of the inverted arch part (201). Or, the grouting layer (70) is set as a grouting solidified layer body of a precast inverted arch, and the grouting layer (70) is respectively set to be distributed corresponding to the grouting pipe (50) and the exhaust pipe (60). One side surface of the grouting layer (70) is set to be connected to the precast inverted arch assembly (20), and the other side surface of the grouting layer (70) is set to be connected to the paving layer (40). Or, the grouting pipe (50) and the exhaust pipe (60) are respectively arranged as cylindrical bodies and are respectively arranged to be embedded in the prefabricated inverted arch assembly (20); the upper end portion of the grouting pipe (50) is arranged on the upper end face portion of the prefabricated inverted arch assembly (20) and the upper end portion of the exhaust pipe (60) is arranged in the prefabricated inverted arch assembly (20); the lower end portion of the grouting pipe (50) and the lower end portion of the exhaust pipe (60) are respectively arranged on the lower end face portion of the prefabricated inverted arch assembly (20) and the lower end portion of the grouting pipe (50) and the lower end portion of the exhaust pipe (60) are respectively arranged to be distributed corresponding to the grouting layer (70); Or, the grouting pipe (50) is configured to include a pipe portion I (501) and a pipe portion II (502), wherein the pipe portion I (501) is disposed on the left end surface of the prefabricated inverted arch assembly (20), and the pipe portion II (502) is disposed on the right end surface of the prefabricated inverted arch assembly (20). Alternatively, the prefabricated inverted arch assembly (20) and the paving layer (40) are arranged to be distributed in a manner of supporting by fluid condensation, together with the grouting pipe (50), the exhaust pipe (60) and the grouting layer (70). Alternatively, the center line of the prefabricated inverted arch assembly (20), the center line of the paving layer (40) and the center line of the grouting layer (70) are arranged on the same straight line, the pipe portion I (501) is arranged between the step surface body (202) located at the left end face and the left end of the receiving tank body (204), and the pipe portion II (502) is arranged between the step surface body (202) located at the right end face and the right end of the receiving tank body (204).

7. A construction method for a prefabricated invert foundation device, characterized in that the steps are: The paving layer (40) and the prefabricated inverted arch assembly (20) enable the prefabricated inverted arch foundation device to be assembled, the grouting layer (70) enables the prefabricated inverted arch assembly (20) to be supported by a mortar condensate, and the pipeline group enables the grouting of the prefabricated inverted arch to be injected through a pipeline, thereby achieving filling and support by a self-flowing slurry viscous body.

8. The construction method of the prefabricated invert foundation device according to claim 1 is characterized in that the steps are: The raw materials of the paving layer (40) are spread flat on the bottom inner wall of the high-speed tunnel. After the raw materials of the paving layer (40) are solidified, the paving layer (40) is obtained on the bottom inner wall of the high-speed tunnel. The installation position of the prefabricated inverted arch assembly (20) is marked on the paving layer (40). The prefabricated inverted arch assembly (20) is placed on the installation position of the prefabricated inverted arch assembly (20) by a hoisting machine. When the height of the prefabricated inverted arch assembly (20) is greater than a predetermined height, a weighting treatment is performed on the inverted arch portion (201) to make the height of the prefabricated inverted arch assembly (20) equal to the predetermined height. When the height of the prefabricated inverted arch assembly (20) is less than the predetermined height, the grouting of the prefabricated inverted arch is passed through the pipe portion I (501) and the pipe portion II (502). 02) is injected, and the grouting of the prefabricated inverted arch is released between the inverted arch part (201) and the paving layer (40) through the pipe part I (501), the pipe part II (502) and the containing tank body (204). When the height of the prefabricated inverted arch assembly (20) is equal to the predetermined height, the injection of the grouting of the prefabricated inverted arch is stopped, and the inverted arch part (201) is connected to the bolts pre-buried in the high-speed tunnel through nuts. The grouting of the prefabricated inverted arch is then injected through the pipe part I (501) and the pipe part II (502) under a pressurized state, and the inverted arch part (201) is reinforced and connected. After the grouting of the prefabricated inverted arch solidifies, a grouting layer (70) is obtained between the inverted arch part (201) and the paving layer (40).

9. A grouting material for a prefabricated invert, characterized by: Contains redispersible latex powder, desulfurized gypsum, cement and steel slag powder. Or, according to weight ratio: containing 10-15 parts of redispersible latex powder, 15-19 parts of desulfurized gypsum, 20-22 parts of cement and 30-35 parts of steel slag powder, Alternatively, the redispersible latex powder is set to be fine particles obtained by spray drying a polymer emulsion of vinyl acetate and acrylic acid, the desulfurized gypsum is set to be desulfurized gypsum powder, the cement is set to be 425 silicate cement, and the steel slag powder is set to be 120-180 mesh steel slag powder.

10. A method for preparing grouting raw materials for a prefabricated invert, characterized in that the steps are: 30-35 parts of steel slag powder are heated to 600-650°C in a heating axe, 15-19 parts of desulfurized gypsum are sprinkled into the heating axe, and then 30-35 parts of steel slag powder and 15-19 parts of desulfurized gypsum are mixed, and the mixture of 30-35 parts of steel slag powder and 15-19 parts of desulfurized gypsum is taken out from the heating axe, and the mixture is cooled to room temperature to obtain a grouting raw material medium. When the grouting raw material of the prefabricated invert arch needs to be prepared, 20-22 parts of cement and 10-15 parts of redispersible latex powder are put into a mixer and stirred for 10-30 minutes, and an appropriate amount of water is added for stirring and mixing to obtain a grouting raw material medium liquid, and the grouting raw material medium is put into the grouting raw material medium liquid, and stirred and mixed for 5-8 minutes to obtain the grouting of the prefabricated invert arch.

Images