Drainage blind pipe positioning device and construction method

Abstract

The invention discloses a drainage blind pipe positioning device and a construction method, and belongs to the technical field of tunnel drainage, the positioning device comprises a positioning mold and a joint pipe, the positioning mold comprises a barrel-shaped part and an edge part arranged on the barrel-shaped part, the edge part is provided with a bolt hole, the barrel-shaped part is provided with a stretching hole, and the joint pipe is connected with the bolt hole; the connector pipe is located in the barrel body of the barrel-shaped part and connected with the stretching-in hole, and an included angle is formed between the connector pipe and the stretching-in hole. The construction method comprises the following steps: S1, measuring and positioning; s2, the mold is mounted, specifically, a mounting opening and a mounting hole are formed in the side wall formwork, the barrel-shaped part is inserted into the mounting opening, the edge part is in bolted connection with the side wall formwork, and a gap is filled with quick-setting cement; s3, blind pipe installation: arranging a steel bar bracket, installing a drainage blind pipe, and enabling the drainage blind pipe to extend into the joint pipe; s4, concrete is poured; and S5, demolding is conducted, specifically, bolts are disassembled, and the drainage blind pipe positioning device is disassembled. The problem that the drainage blind pipe is prone to damage and deviation is solved, construction of the tunnel drainage blind pipe can be standardized, positioning is accurate, and the blind pipe is prevented from forming a reverse slope.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel drainage, and in particular to a drainage blind pipe positioning device and a construction method. Background Art

[0002] The construction quality of the tunnel drainage system is the key to the construction of the tunnel lining, especially the construction of the drainage blind pipe. In the construction of the drainage hole, if the reserved joint (water diversion pipe section) of the drainage blind pipe behind the secondary lining is not effectively reinforced, it is easy to be impacted during the concrete pouring process, resulting in damage, deformation and displacement, forming reverse slope, blockage and other phenomena. At present, the conventional fixing method is mainly to use rivets with pressure strips or to position the blind pipe on the inverted arch steel bar. Although the displacement of the reserved joint of the drainage blind pipe is avoided to a certain extent, it cannot avoid the damage and deformation of the blind pipe caused by the impact of concrete on the drainage blind pipe, forming the reverse slope problem. Therefore, there is an urgent need for a technology that can play the dual functions of positioning and protecting the drainage blind pipe. Summary of the invention

[0003] The purpose of the present invention is to solve the above technical problems and provide a drainage blind pipe positioning device and a construction method. After the drainage blind pipe positioning device is connected with the side wall formwork bolts, it can play a fixing role to ensure that the drainage blind pipe will not shift, and the disassembly and assembly only requires the operation of the bolts, which is simple and convenient. At the same time, the joint pipe can protect the drainage blind pipe located inside it to avoid deformation, displacement and damage caused by concrete impact. There is a preset angle between the joint pipe and the insertion hole, which can fix the setting direction of the reserved joint to avoid reverse slope and poor drainage. It has the dual functions of positioning and protection.

[0004] To achieve the above-mentioned purpose, the present invention provides the following scheme: The present invention discloses a drainage blind pipe positioning device, comprising a positioning mold and a joint pipe for being sleeved on the drainage blind pipe, the positioning mold comprising a barrel-shaped portion and an edge portion arranged at the barrel mouth of the barrel-shaped portion, the barrel-shaped portion is used to pass through an installation opening pre-opened on a side wall template, the edge portion is provided with a bolt hole for bolt connection with the side wall template, the bottom of the barrel-shaped portion is provided with an insertion hole for the drainage blind pipe to extend into, the joint pipe is located in the barrel body of the barrel-shaped portion, the joint pipe is connected to the insertion hole, and an angle is formed between the axis of the joint pipe and the axis of the insertion hole.

[0005] Preferably, the barrel-shaped portion is a quadrangular pyramid barrel, the barrel mouth of the quadrangular pyramid barrel is located at the large end, the barrel bottom of the quadrangular pyramid barrel is located at the small end, and the edge portion is a rectangular ring.

[0006] Preferably, the barrel-shaped portion and the edge portion are made of steel plates, and the joint pipe is a steel pipe.

[0007] Preferably, the joint pipe and the insertion hole are fixed by welding.

[0008] Preferably, the thickness of the steel plate and the steel pipe is not less than 6 mm.

[0009] A drainage blind pipe construction method is also disclosed, comprising the following steps:

[0010] S1. Measurement and positioning: Draw lines according to the designed elevation, and drill blind pipe positioning holes at horizontal intervals at the drawn lines;

[0011] S2. Installing the mold: opening an installation opening and an installation hole on the side wall template, inserting the barrel-shaped portion of the drainage blind pipe positioning device according to any one of claims 1 to 5 into the installation opening, connecting the bolt hole at the edge of the drainage blind pipe positioning device and the installation hole of the side wall template with bolts, and filling the gap with quick-drying cement;

[0012] S3, installing the blind pipe: setting a bracket positioning hole on the primary support surface, pre-embedding the steel bracket in the bracket positioning hole, installing the drainage blind pipe on the steel bracket, and the reserved joint of the drainage blind pipe passes through the insertion hole on the barrel portion and extends into the joint pipe;

[0013] S4, pouring concrete: pouring concrete in the side wall formwork;

[0014] S5, demoulding: after the concrete is initially set, remove the bolts and then remove the drainage blind pipe positioning device.

[0015] Preferably, before step S1, the method further includes step S0, processing and manufacturing: processing and manufacturing the drainage blind pipe positioning device.

[0016] Preferably, in step S1, when marking, drainage blind pipes are arranged at the bottom recess of the base surface and at places where there are water outlets.

[0017] Preferably, in step S1, the hole spacing of the blind tube positioning holes is 50-100 mm.

[0018] Preferably, in step S3, the drainage blind pipe and the steel bar bracket are fixed by winding with iron wire.

[0019] Compared with the prior art, the present invention has achieved the following technical effects:

[0020] In the present invention, the bolt holes at the edge of the drainage blind pipe positioning device are connected with the side wall formwork bolts to ensure that the positioning mold will not shift during concrete pouring, play a fixing role, and can effectively position the drainage blind pipe. Moreover, installation and removal only require the operation of bolts, which is simple and convenient. At the same time, the reserved joint of the drainage blind pipe extends into the joint pipe, and the joint pipe can protect the drainage blind pipe inside it to avoid deformation, displacement and damage caused by concrete impact. Moreover, there is a preset angle between the joint pipe and the insertion hole, and the setting direction of the reserved joint of the drainage blind pipe can be fixed, which solves the problem that the drainage blind pipe is easy to be damaged and easily displaced, can standardize the construction of tunnel annular blind pipes, accurately position and prevent the blind pipes from forming reverse slopes to cause poor drainage. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 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 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.

[0022] Figure 1 It is a rear perspective structural schematic diagram of the drainage blind pipe positioning device in the embodiment;

[0023] Figure 2 It is a front perspective structural diagram of the drainage blind pipe positioning device in the embodiment;

[0024] Figure 3 It is a dimension diagram of the positioning mold in the drainage blind pipe positioning device in the embodiment;

[0025] Figure 4 It is a front view schematic diagram of the connection relationship between the drainage blind pipe positioning device and the side wall template in the embodiment;

[0026] Figure 5 It is a cross-sectional schematic diagram of the connection relationship between the drainage blind pipe positioning device and the side wall template in the embodiment;

[0027] Figure 6 Schematic diagram of the positional relationship among the drainage blind pipe positioning device, the side wall formwork and the steel bar bracket in the embodiment.

[0028] Explanation of the reference numerals: 1. barrel-shaped portion; 2. edge portion; 3. joint pipe; 4. insertion hole; 5. bolt hole; 6. side wall formwork; 7. steel bar bracket; 8. bolt; 9. drainage blind pipe. DETAILED DESCRIPTION

[0029] 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.

[0030] Example 1

[0031] This embodiment provides a drainage blind pipe positioning device, such as Figures 1 to 6 As shown, it includes a positioning mold and a joint pipe 3. The positioning mold includes a barrel portion 1 and an edge portion 2. The edge portion 2 is arranged at the barrel mouth of the barrel portion 1. The barrel bottom of the barrel portion 1 is provided with an insertion hole 4. The edge portion 2 is provided with a bolt hole 5. The joint pipe 3 is connected to the insertion hole 4, and the axis of the joint pipe 3 and the axis of the insertion hole 4 have an angle.

[0032] Working principle:

[0033] When in use, it is necessary to first open an installation opening and an installation hole on the side wall template 6, and then pass the barrel portion 1 of the drainage blind pipe positioning device through the installation opening, attach the edge portion 2 to the outer surface of the side wall template 6, and make the bolt hole 5 of the edge portion 2 correspond to the installation hole on the side wall template 6, the bolt hole 5 and the installation hole are connected by bolts 8, and the reserved joint of the drainage blind pipe 9 is extended into the joint pipe 3 through the insertion hole 4 to complete the positioning installation. After the subsequent pouring is completed, the bolt 8 is removed, and the drainage blind pipe positioning device can be removed. The bolt hole 5 of the edge portion 2 of the drainage blind pipe positioning device is connected with the side wall template 6 by bolts to ensure that the positioning mold will not shift during concrete pouring, play a fixing role, and can effectively position the drainage blind pipe 9. Moreover, installation and removal only require the operation of bolts, which is simple and convenient. At the same time, the drainage blind pipe 9 extends into the joint pipe 3, and the joint pipe 3 can protect the drainage blind pipe 9 inside it to avoid deformation and displacement caused by concrete impact. There is a preset angle between the joint pipe 3 and the insertion hole 4, which can fix the elbow direction of the drainage blind pipe 9 to avoid reverse slope and poor drainage.

[0034] In one embodiment, if Figures 1 to 6 As shown, the barrel-shaped portion 1 is a quadrangular pyramid barrel, the barrel mouth of the quadrangular pyramid barrel is located at the large end, the barrel bottom of the quadrangular pyramid barrel is located at the small end, and the edge portion 2 is a rectangular ring.

[0035] In one embodiment, if Figures 1 to 6 As shown, the bolt holes 5 are arranged along the circumference of the edge portion 2. For example, four bolt holes 5 are provided, which are respectively provided at the upper left, lower left, upper right and lower right of the rectangular ring of the edge portion 2.

[0036] In one embodiment, if Figures 1 to 6As shown, the barrel portion 1 and the edge portion 2 are made of steel plates, and the joint pipe 3 is a steel pipe.

[0037] In one embodiment, if Figures 1 to 6 As shown, the connecting pipe 3 and the insertion hole 4 are fixed by welding.

[0038] In one embodiment, if Figures 1 to 6 As shown, the thickness of the steel plate and the steel pipe is not less than 6 mm. Preferably, the thickness of the steel plate and the steel pipe is 6 mm. That is, the thickness of the barrel portion 1, the edge portion 2, and the joint pipe 3 are all 6 mm.

[0039] Example 2

[0040] This embodiment provides a drainage blind pipe construction method, such as Figures 1 to 6 As shown, the following steps are included:

[0041] S1. Measurement and positioning: Draw lines according to the designed elevation, and drill blind pipe positioning holes at horizontal intervals at the drawn lines;

[0042] S2, installing the mold: opening an installation opening and an installation hole on the side wall template 6, inserting the barrel portion 1 of the drainage blind pipe positioning device in Example 1 into the installation opening, connecting the bolt hole of the edge portion 2 of the drainage blind pipe positioning device and the installation hole of the side wall template 6 with bolts 9, and filling the gap with quick-drying cement;

[0043] S3, installing the blind pipe: setting a bracket positioning hole on the primary support surface, pre-embedding the steel bracket 7 in the bracket positioning hole, installing the drainage blind pipe 9 on the steel bracket 7, and the reserved joint of the drainage blind pipe 9 passes through the insertion hole on the barrel portion 1 and extends into the joint pipe 3;

[0044] S4, pouring concrete: pouring concrete in the side wall formwork 6;

[0045] S5. Demoulding: After the concrete is initially set, remove the bolt 8 and then remove the drainage blind pipe positioning device.

[0046] This construction method uses a drainage blind pipe positioning device for positioning, which can standardize the construction of annular blind pipes on the low side walls of tunnels, accurately position and protect the reserved joints of drainage blind pipes, and facilitate later construction. During the application process, according to actual needs, the problem of easy damage and displacement of drainage blind pipes on the low side walls of tunnels is solved, and the blind pipes are prevented from forming reverse slopes and causing poor drainage. The drainage blind pipes can be fixed and protected by the drainage blind pipe positioning device, and only need to be installed once. When dismantling, the drainage blind pipe positioning device can be easily removed by unscrewing the bolts. The removal does not damage the drainage blind pipes, and the drainage blind pipes can be reused.

[0047] In one embodiment, if Figures 1 to 6As shown, before step S1, step S0 is also included: processing and manufacturing the drainage blind pipe positioning device. Preferably, the drainage blind pipe positioning device is processed and manufactured using a 6mm steel plate.

[0048] In one embodiment, if Figures 1 to 6 As shown, in step S1, when marking, the drainage blind pipe 9 is set as much as possible at the bottom concave of the base surface and at the place where there is a water outlet, so that the position of the blind pipe is accurate and reasonable.

[0049] In one embodiment, if Figures 1 to 6 As shown, in step S1, the hole spacing of the blind pipe positioning holes is 50 to 100 mm, and fixing points should be appropriately increased in uneven areas.

[0050] In one embodiment, if Figures 1 to 6 As shown, in step S3, the drainage blind pipe 9 and the steel bar bracket 7 are fixed by winding with iron wire.

[0051] In one embodiment, if Figures 1 to 6 As shown, in step S3, a bracket positioning hole is drilled on the primary support surface with an impact drill, and then the steel bracket 7 is pre-embedded in the bracket positioning hole with an anchoring agent.

[0052] In one embodiment, if Figures 1 to 6 As shown, in step S3, a φ16 steel bar bracket 7 is used.

[0053] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A drainage blind pipe positioning device, characterized in that: It comprises a positioning mould and a joint pipe for being sleeved on the drainage blind pipe, the positioning mould comprises a barrel-shaped part and an edge part arranged at the barrel mouth of the barrel-shaped part, the barrel-shaped part is used to pass through the installation opening pre-opened on the side wall template, the edge part is provided with a bolt hole for being bolted to the side wall template, the bottom of the barrel-shaped part is provided with an insertion hole for the drainage blind pipe to be inserted, the joint pipe is located in the barrel body of the barrel-shaped part, the joint pipe is connected to the insertion hole, and an angle is formed between the axis of the joint pipe and the axis of the insertion hole.

2. A drainage blind pipe positioning device according to claim 1, characterized in that: The barrel-shaped portion is a quadrangular pyramid barrel, the barrel mouth of the quadrangular pyramid barrel is located at the large end, the barrel bottom of the quadrangular pyramid barrel is located at the small end, and the edge portion is a rectangular ring.

3. A drainage blind pipe positioning device according to claim 1, characterized in that: The barrel-shaped portion and the edge portion are made of steel plates, and the joint pipe is a steel pipe.

4. A drainage blind pipe positioning device according to claim 3, characterized in that: The joint pipe and the insertion hole are fixed by welding.

5. A drainage blind pipe positioning device according to claim 4, characterized in that: The thickness of the steel plate and the steel pipe is not less than 6 mm.

6. A drainage blind pipe construction method, characterized in that: The following steps are involved: S1. Measurement and positioning: Draw lines according to the designed elevation, and drill blind pipe positioning holes at horizontal intervals at the drawn lines; S2. Installing the mold: opening an installation opening and an installation hole on the side wall template, inserting the barrel-shaped portion of the drainage blind pipe positioning device according to any one of claims 1 to 5 into the installation opening, connecting the bolt hole at the edge of the drainage blind pipe positioning device and the installation hole of the side wall template with bolts, and filling the gap with quick-drying cement; S3, installing the blind pipe: setting a bracket positioning hole on the primary support surface, pre-embedding the steel bracket in the bracket positioning hole, installing the drainage blind pipe on the steel bracket, and the reserved joint of the drainage blind pipe passes through the insertion hole on the barrel portion and extends into the joint pipe; S4, pouring concrete: pouring concrete in the side wall formwork; S5, demoulding: after the concrete is initially set, remove the bolts and then remove the drainage blind pipe positioning device.

7. A drainage blind pipe construction method according to claim 6, characterized in that: Before step S1, the method also includes step S0, processing and manufacturing: processing and manufacturing the drainage blind pipe positioning device.

8. A drainage blind pipe construction method according to claim 6, characterized in that: In step S1, drainage blind pipes are set at the bottom concave part of the base surface and at the place where there is a water outlet when marking.

9. A drainage blind pipe construction method according to claim 6, characterized in that: In step S1, the hole spacing of the blind pipe positioning holes is 50-100 mm.

10. A drainage blind pipe construction method according to claim 6, characterized in that: In step S3, the drainage blind pipe and the steel bar bracket are fixed by winding with iron wire.

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