Prefabricating and assembling construction method for tunnel buried section construction

Abstract

The invention relates to a prefabrication and assembly construction method for tunnel hidden section construction, after construction is completed based on an enclosure structure and inner side earth excavation is completed, a prefabrication side wall, a prefabrication middle partition wall and a prefabrication vault are provided and used for rapid construction of a tunnel hidden section on the inner side of the enclosure structure, and the construction method comprises the following steps: S1, pouring of a concrete bottom plate; s2, the prefabricated side walls and the prefabricated middle partition wall are hoisted and installed; s3, hoisting and mounting the prefabricated vault; s4, soil covering and backfilling are carried out, and construction is completed; the prefabricated side walls, the prefabricated middle partition wall and the prefabricated vault are provided and connected into a whole on the concrete bottom plate in a prefabricated splicing mode after the concrete bottom plate is constructed, the mode of complete cast-in-place is replaced for construction of the tunnel hidden section, the problems that complete cast-in-place construction is tedious and low in efficiency are solved, and the construction progress of the tunnel hidden section is greatly accelerated.

Description

Technical Field

[0001] The invention relates to the technical field of engineering construction, in particular to a prefabricated assembly construction method for a buried tunnel section. Background Art

[0002] The commonly used construction method for the buried section of the tunnel is the cast-in-place construction method of formwork support concrete. This method has problems such as long construction period, large number of manpower required for setting up and dismantling the support, and high safety risks. In addition, the concrete takes a long time to set up, and the construction quality is difficult to guarantee. Summary of the Invention

[0003] The purpose of the present invention is to overcome the defects of the prior art and provide a prefabricated assembly construction method for the construction of a buried tunnel section, so as to solve the problems of complicated and low efficiency in the construction of the buried tunnel section in the prior art.

[0004] To achieve the above-mentioned object, the present invention provides a method for prefabricating and assembling a buried tunnel section. After the enclosure structure is completed and the inner earthwork excavation is completed, prefabricated side walls, prefabricated middle partition walls, and prefabricated vaults are provided and used to rapidly construct the buried tunnel section inside the enclosure structure. The method comprises the following steps:

[0005] S1. Pouring of concrete base plate;

[0006] S2. Hanging and installation of prefabricated side walls and prefabricated middle partition walls;

[0007] S3. Hoisting and installation of prefabricated vaults;

[0008] S4. Backfill with soil to complete the construction.

[0009] By adopting this technical solution, prefabricated side walls, prefabricated middle partition walls and prefabricated vaults are provided, and after the construction of the concrete base plate, they are connected as a whole in the form of prefabricated assembly on the concrete base plate, replacing the completely cast-in-place form for the construction of the buried section of the tunnel. This solves the problem of the cumbersome and inefficient completely cast-in-place construction and greatly speeds up the construction progress of the buried section of the tunnel.

[0010] Furthermore, step S1 includes removing the inner supports within the set construction range inside the enclosure structure, and then laying steel bars and pouring concrete, which is formed into a concrete base plate after solidification.

[0011] By adopting this technical solution, the internal supports of the constructed retaining structure within the construction scope can be prevented from affecting the construction of the buried section of the tunnel.

[0012] Furthermore, step S2 includes using a lifting device to lift the prefabricated side walls and the prefabricated middle partition wall into the enclosure structure, and installing the bottom ends of the prefabricated side walls and the prefabricated middle partition wall to the top side and middle positions of the concrete base plate, respectively.

[0013] By adopting this technical solution, the rapid forming of the wall part of the buried section of the tunnel can be achieved by hanging and placing the prefabricated side walls and prefabricated middle partition walls and connecting them to the concrete bottom plate respectively.

[0014] Furthermore, step S3 includes using a lifting device to lift the prefabricated vault into the enclosure structure, erecting it to the common top of the prefabricated side walls and the prefabricated middle partition wall, and connecting it to the top of the prefabricated side walls and the prefabricated middle partition wall respectively through a third connecting piece.

[0015] By adopting this technical solution, the buried section of the tunnel was quickly completed by hanging the prefabricated vault and connecting it with the prefabricated side walls and prefabricated middle partition walls respectively.

[0016] Furthermore, the prefabricated vault in step S3 includes a first vault plate, a second vault plate and a third vault plate. During construction, the first vault plate and the second vault plate are first hoisted to the top of the prefabricated side wall and the prefabricated middle partition wall respectively, and are connected to each other through a third connecting piece. Then, the third vault plate is hoisted and erected between the tops of the first vault plate and the second vault plate, and then the third vault plate is connected to the first vault plate and the second vault plate respectively.

[0017] By adopting this technical solution, the prefabricated vault is divided into three parts: the first vault plate, the second vault plate and the third vault plate, which solves the problem of difficulty in hoisting the prefabricated vault as a whole. At the same time, a certain degree of assembly error can be allowed, avoiding the problem that the prefabricated vault cannot be connected with the prefabricated side walls and the prefabricated middle partition wall at the same time.

[0018] Furthermore, step S4 includes backfilling the top of the prefabricated vault with soil and completing the construction after compaction.

[0019] By adopting this technical solution, the top soil is restored by backfilling, and the constructed tunnel section is buried.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] Prefabricated side walls, prefabricated middle partition walls and prefabricated vaults are provided. After the concrete base plate is constructed, they are prefabricated and assembled together on the concrete base plate to replace the completely cast-in-place method for the construction of the buried tunnel section. This solves the problem of cumbersome and inefficient cast-in-place construction and significantly speeds up the construction progress of the buried tunnel section. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the main cross-section of a tunnel buried section constructed using the prefabricated assembly construction method for the tunnel buried section of the present invention;

[0023] Figure 2It is a schematic diagram of the lateral structure of the prefabricated side wall in the prefabricated assembly construction method for the buried tunnel section of the present invention.

[0024] Explanation of the accompanying reference numerals: 1. Concrete base plate; 2. First connecting member; 3. Second connecting member; 4. Prefabricated side wall; 5. Prefabricated middle partition wall; 6. Third connecting member; 7. Prefabricated vault; 71. First vault plate; 72. Second vault plate; 73. Third vault plate; 8. First reserved bolt hole; 9. Second reserved bolt hole; 10. Shear pin reserved hole; 11. Fan embedded part; 12. Rubber strip; 20. Enclosure structure. DETAILED DESCRIPTION

[0025] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0026] Please see the attached Figure 1 The present invention provides a prefabricated assembly construction method for a buried tunnel section. After the enclosure structure 20 is completed, the earthwork inside the enclosure structure is excavated to set the bottom elevation of the concrete bottom plate 1. Prefabricated side walls 4, prefabricated middle partition walls 5, and prefabricated vaults 7 are provided and used to quickly construct the buried tunnel section inside the enclosure structure. The construction method includes the following steps: S1, pouring the concrete bottom plate 1; S2, hanging and installing the prefabricated side walls 4 and the prefabricated middle partition walls 5; S3, hanging and installing the prefabricated vaults 7; S4, backfilling the soil to complete the construction.

[0027] Prefabricated side walls 4, prefabricated middle partition walls 5 and prefabricated vaults 7 are provided. After the construction of the concrete base plate 1, they are connected as a whole on the concrete base plate 1 in the form of prefabricated assembly, so as to replace the completely cast-in-place form for the construction of the buried tunnel section, solve the problem of the cumbersome and low efficiency of the completely cast-in-place construction, and greatly speed up the construction progress of the buried tunnel section.

[0028] Step S1 includes removing the internal supports within the construction range set inside the enclosure structure 20 to prevent the internal supports of the enclosure structure 20 constructed within the construction range from affecting the construction of the buried tunnel section; then laying steel bars and pouring concrete, and the concrete is formed into a concrete base plate 1 after solidification;

[0029] Furthermore, before the concrete solidifies, armpit corner formwork is set at the top side and middle positions of the concrete base plate 1, and the first connecting member 2 and the second connecting member 3 are pre-embedded respectively. After the concrete solidifies, the armpit corner with the first connecting member 2 pre-embedded at the top side and the armpit corner with the second connecting member 3 pre-embedded at the middle of the top surface are formed;

[0030] Furthermore, the first connector 2 and the second connector 3 are both waterproof connectors, which can prevent water seepage between components subsequently connected by the first connector 2 and the second connector 3 .

[0031] Step S2 includes using a hoisting device to hoist the prefabricated side walls 4 and the prefabricated middle partition wall 5 into the enclosure structure 20, and installing the bottom ends of the prefabricated side walls 4 and the prefabricated middle partition wall 5 to the top side and middle positions of the concrete base plate 1, respectively. By hoisting the prefabricated side walls 4 and the prefabricated middle partition wall 5 and connecting them to the concrete base plate 1, the rapid prototyping of the wall portion of the buried tunnel section is achieved.

[0032] Furthermore, after the prefabricated side wall 4 is hoisted into place, its bottom end is fixed and waterproofed to the concrete bottom plate 1 through the first connecting piece 2; after the prefabricated middle partition wall 5 is hoisted into place, its bottom end is fixed and waterproofed to the concrete bottom plate 1 through the second connecting piece 3;

[0033] Further, with reference to the attached Figure 2 , further comprising the respective connections of adjacent prefabricated side walls 4 and adjacent prefabricated middle partition walls 5. Specifically, adjacent prefabricated side walls 4 and adjacent prefabricated middle partition walls 5 are each provided with mutually connected first reserved bolt holes 8, and rubber strips 12 are sandwiched between adjacent prefabricated side walls 4 and adjacent prefabricated middle partition walls 5. After the vertically sandwiched rubber strips 12 of adjacent prefabricated side walls 4 or adjacent prefabricated middle partition walls 5 are placed in place, bolts are passed through the interconnected first reserved bolt holes 8 to perform the fixed and waterproof connection of the adjacent prefabricated side walls 4 or adjacent prefabricated middle partition walls 5;

[0034] Furthermore, the rubber strips 12, 2 and 3 are all waterproof.

[0035] Furthermore, the method further includes connecting third connecting members 6 to the top of the prefabricated side wall 4 and the prefabricated middle partition wall 5, respectively, to provide a prerequisite for the installation of the prefabricated vault 7 on the common top of the two.

[0036] Furthermore, the third connecting member 6 is a waterproof connecting member, and the third connecting member 6 and the rubber strip 12 cooperate with each other in a waterproof manner.

[0037] Step S3 includes using a lifting device to lift the prefabricated vault 7 into the enclosure structure 20, erecting it to the top of the prefabricated side walls 4 and the prefabricated middle partition wall 5, and connecting it to the top of the prefabricated side walls 4 and the prefabricated middle partition wall 5 respectively through the third connecting member 6;

[0038] Furthermore, the prefabricated vault 7 in step S3 includes a first vault plate 71, a second vault plate 72 and a third vault plate 73. During construction, the first vault plate 71 and the second vault plate 72 are first hoisted to the top of the prefabricated side wall 4 and the prefabricated middle partition wall 5, respectively, and are connected to each other through the third connecting member 6. Subsequently, the third vault plate 73 is hoisted and supported between the tops of the first vault plate 71 and the second vault plate 72, and then the third vault plate 73 is connected to the first vault plate 71 and the second vault plate 72, respectively. This solves the problem of the difficulty in hoisting the prefabricated vault 7 as a whole, and at the same time allows a certain degree of assembly error, avoiding the problem that the prefabricated vault 7 cannot be docked with the prefabricated side wall 4 and the prefabricated middle partition wall 5 at the same time.

[0039] Furthermore, the third arch plate 73 is connected to the first arch plate 71 and the third arch plate 73 is connected to the second arch plate 72. Specifically, the third arch plate 73 is respectively connected to the first arch plate 71 and the second arch plate 72 to form a second reserved bolt hole 9; when the third arch plate 73 is connected to the first arch plate 71, the bolts are passed through the second reserved bolt holes 9 connected to the first arch plate 71 and tightened to complete the fixed connection; when the third arch plate 73 is connected to the second arch plate 72, the bolts are passed through the second reserved bolt holes 9 connected to the second arch plate 72 and tightened to complete the fixed connection;

[0040] Furthermore, in order to improve the waterproof performance between the arched plates, rubber strips 12 are sandwiched between the third arched plate 73 and the first arched plate 71 , and between the third arched plate 73 and the second arched plate 72 .

[0041] Furthermore, step S4 includes backfilling the top of the prefabricated vault 7 with soil, and completing the construction after compaction, thereby achieving concealed burial of the constructed tunnel section.

[0042] The present invention has been described in detail above with reference to the embodiments of the accompanying drawings. A person skilled in the art can make various modifications to the present invention based on the above description. Therefore, certain details in the embodiments should not be construed as limiting the present invention. The scope of protection of the present invention shall be determined by the scope defined in the appended claims.

Claims

1. A method for prefabricated assembly of a tunnel buried section, which is based on the completion of the enclosure structure and the excavation of the inner earthwork, and uses prefabricated side walls, prefabricated middle partition walls and prefabricated vaults to quickly construct the tunnel buried section inside the enclosure structure, characterized in that: The construction method comprises the following steps: S1. Pouring of concrete base plate; S2. Hanging and installation of prefabricated side walls and prefabricated middle partition walls; S3. Hoisting and installation of prefabricated vaults; S4. Backfill with soil to complete the construction.

2. The method for prefabricating and assembling a buried tunnel section according to claim 1 is characterized in that: Step S1 includes removing the internal supports within the set construction range inside the enclosure structure, then laying steel bars and pouring concrete, and forming the concrete base plate after solidification.

3. The method for prefabricating and assembling a buried tunnel section according to claim 2 is characterized in that: Step S2 includes using a lifting device to lift the prefabricated side walls and the prefabricated middle partition wall into the enclosure structure, and installing the bottom ends of the prefabricated side walls and the prefabricated middle partition wall to the top side and middle positions of the concrete base plate, respectively.

4. The method for prefabricating and assembling a buried tunnel section according to claim 3 is characterized in that: Step S3 includes using a lifting device to lift the prefabricated vault into the enclosure structure, erecting it to the common top of the prefabricated side walls and the prefabricated middle partition wall, and connecting it to the top of the prefabricated side walls and the prefabricated middle partition wall respectively through a third connecting piece.

5. The method for prefabricating and assembling a buried tunnel section according to claim 4 is characterized in that: The prefabricated vault in step S3 includes a first vault plate, a second vault plate and a third vault plate. During construction, the first vault plate and the second vault plate are first hoisted to the top of the prefabricated side wall and the prefabricated middle partition wall respectively, and are connected to each other through a third connecting piece. Then, the third vault plate is hoisted and erected between the tops of the first vault plate and the second vault plate, and then the third vault plate is connected to the first vault plate and the second vault plate respectively.

6. The method for prefabricating and assembling a buried tunnel section according to claim 1 is characterized in that: Step S4 includes backfilling the top of the prefabricated vault with soil and completing the construction after compaction.

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