Multiple waterproof structure for secondary lining deformation joint of dismantled variable cross-section tunnel and construction method

Abstract

The invention relates to the technical field of civil engineering, in particular to a multiple waterproof structure for a secondary lining deformation joint of a dismantled variable cross-section tunnel and a construction method.The multiple waterproof structure comprises a water swelling strip, a back pasting water stop belt, a stainless steel plate drainage groove, a polyethylene plastic foam plate, a cement nail and a sealing rubber pipe; comprising the steps of arranging a deformation joint, using a water-swelling water stop strip, a back-attached water stop belt, a stainless steel plate drainage groove, a polyethylene plastic foam plate and the like, the waterproof performance of the construction joint is remarkably improved, and the problems that a single waterproof measure is adopted in a traditional method, the waterproof effect is limited, the requirements for engineering safety and durability are difficult to meet, and the construction cost is low are effectively solved. Particularly, the waterproof difficulty is higher at the position where the thickness of the concrete changes.

Description

Technical Field

[0001] The invention relates to the technical field of civil engineering, and in particular to a multiple waterproof structure and a construction method for a secondary lining deformation joint of a variable-section tunnel after demolition. Background Art

[0002] Underground engineering is an important branch of civil engineering, which specifically involves various types of construction activities carried out below the surface. Underground engineering usually refers to construction activities carried out below the ground, such as subways, tunnels and basements. Tunnel engineering is a form of underground engineering that focuses on building passages in mountains or underwater. In tunnel and underground engineering, waterproofing of secondary lining concrete construction joints is crucial.

[0003] However, traditional methods mostly use a single waterproofing measure, and its waterproofing effect is limited, which makes it difficult to meet the requirements of engineering safety and durability, especially where the concrete thickness changes, making waterproofing more difficult. Summary of the invention

[0004] The purpose of the present invention is to provide a multiple waterproof structure and construction method for the deformation joint of the secondary lining of a variable-section tunnel after demolition, so as to solve the problem that the traditional methods in the prior art mostly adopt a single waterproof measure, and its waterproof effect is limited, and it is difficult to meet the requirements of engineering safety and durability, especially at the place where the concrete thickness changes, the waterproofing is more difficult.

[0005] To achieve the above-mentioned purpose, the present invention provides a multiple waterproof structure for the deformation joint of the secondary lining of a variable-section tunnel after demolition, including a water-swelling waterstop strip, a back-stick waterstop, a stainless steel plate drainage trough, a polyethylene foam board, cement nails and a sealing rubber tube. The back-stick waterstop strip is located at the joint of the new and old concrete, and the joint is set as a deformation joint. The water-swelling waterstop strip is located at the deformation joint of the newly poured concrete, the stainless steel plate drainage trough is located at the reserved groove section during the construction of the deformation joint, and the polyethylene foam board is located in the deformation joint.

[0006] The present invention also provides a multiple waterproof construction method for the deformation joint of the secondary lining of a variable cross-section tunnel after removal, and the multiple waterproof construction method for the deformation joint of the secondary lining of a variable cross-section tunnel after removal comprises the following steps:

[0007] Step S1: Set the joint between the new and old concrete as a deformation joint, and use professional equipment to accurately cut the joint opening to ensure that the joint opening size is accurate and the joint opening is neat;

[0008] Step S2: installing the water-swelling waterstop strip at the newly cast concrete deformation joint by pre-embedding, taking positioning and stabilizing measures to ensure that the water-swelling waterstop strip is firmly and centrally installed;

[0009] Step S3: Use a special adhesive material to firmly embed the back-sticking water stop into the deformation joint, fix it with the cement nails and angle steel, and then use a flexible waterproof coating to paint the gap of the bonding part;

[0010] Step S4: After the installation of the back-sticked water stop is completed, the polyethylene foam board is installed and fixed in the deformation joint, and the polyethylene foam board has an arc portion 5 to 8 cm away from the concrete surface, and the arc portion of the polyethylene foam board is used to reserve an arc groove with a length of 1 cm on each side. After the new concrete is poured and the mold is removed, the joint is cleaned to the reserved groove position, and then the sealing rubber tube is installed to the groove position, and then filled with external polysulfide sealing paste;

[0011] Step S5: cutting out the groove section during the deformation joint construction, and when it is impossible to reserve at the junction of the new and old parts, artificial grooving is adopted to ensure that the groove planes at both ends are level and without misalignment, and the concrete surface in the groove section is smooth;

[0012] Step S6: fix the stainless steel plate drainage trough at the reserved trough section with post-installed chemical anchor bolts, and apply flexible waterproof material on its surface and gaps to seal it.

[0013] Wherein, in step S3, the special adhesive material is one or more combinations of special adhesive glue or glass glue.

[0014] Wherein, in step S3, half the width of the back-adhered waterstop is adhered to the old concrete, and the cement nails are arranged at a distance of every 50 cm, and the angle steels are arranged at a distance of every 100 cm.

[0015] Wherein, in step S5, the depth of the groove section is 3 cm and the width is 30 cm.

[0016] Wherein, in step S6, the thickness of the stainless steel plate drainage groove is 2 mm.

[0017] Wherein, the post-placed chemical anchor bolts are arranged at intervals of 80-120 cm, and a water receiving trough is provided in the middle of the stainless steel plate drainage trough.

[0018] The present invention discloses a multiple waterproof structure and construction method for a deformation joint of a secondary lining of a variable-section tunnel after demolition, comprising a water-swelling waterstop strip, a back-sticked waterstop strip, a stainless steel plate drainage trough, a polyethylene foam board, cement nails and a sealing rubber tube. The multiple waterproof measures, including setting the deformation joint, using the water-swelling waterstop strip and the back-sticked waterstop strip, the stainless steel plate drainage trough, the polyethylene foam board, etc., significantly improve the waterproof performance of the construction joint, thereby effectively solving the problem that the traditional method mostly adopts a single waterproof measure, and its waterproof effect is limited, and it is difficult to meet the requirements of engineering safety and durability, especially at the place where the concrete thickness changes, the waterproofing is more difficult. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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.

[0020] Figure 1 It is a flow chart of the steps of the multiple waterproof construction method of the deformation joint of the secondary lining of a variable-section tunnel after demolition provided by the present invention.

[0021] Figure 2 It is a structural schematic diagram of the multiple waterproof structure of the secondary lining deformation joint of the variable-section tunnel after demolition provided by the present invention.

[0022] Figure 3 The present invention Figure 2 A partial enlarged view of point A in the middle.

[0023] 1-water-swelling waterstop, 2-back-sticked waterstop, 3-polysulfide sealing paste, 4-post-chemical anchor, 5-stainless steel plate drainage trough, 6-cement nails, 7-post-concrete, 8-water receiving trough, 9-primary lining shotcrete, 10-waterproof membrane, 11-angle steel, 12-secondary lining to be constructed, 13-polyethylene plastic foam board, 14-sealing rubber tube, 15-original secondary lining. DETAILED DESCRIPTION

[0024] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0025] See also Figure 1 to Figure 3The present invention provides a multiple waterproof structure for the deformation joint of the secondary lining of a variable-section tunnel after demolition, including a water-swelling waterstop strip 1, a back-sticked waterstop strip 2, a stainless steel plate drainage groove 5, a polyethylene foam board 13, a cement nail 6 and a sealing rubber tube 14. The back-sticked waterstop strip 2 is located at the joint of the new and old concrete, and the joint is set as a deformation joint. The water-swelling waterstop strip 1 is located at the deformation joint of the newly poured concrete, the stainless steel plate drainage groove 5 is located at the reserved groove section during the construction of the deformation joint, and the polyethylene foam board 13 is located in the deformation joint.

[0026] The present invention also provides a multiple waterproof construction method for the deformation joint of the secondary lining of a variable cross-section tunnel after removal, and the multiple waterproof construction method for the deformation joint of the secondary lining of a variable cross-section tunnel after removal comprises the following steps:

[0027] Step S1: Set the joint between the new and old concrete as a deformation joint, and use professional equipment to accurately cut the joint opening to ensure that the joint opening size is accurate and the joint opening is neat;

[0028] Step S2: installing the water-swellable waterstop strip 1 at the newly cast concrete deformation joint by pre-embedding, taking positioning and stabilizing measures to ensure that the water-swellable waterstop strip 1 is firmly and centrally installed;

[0029] Step S3: Use a special adhesive material to firmly embed the back-sticking water stop strip 2 into the deformation joint, and fix it with the cement nails 6 and the angle steel 11, and then use a flexible waterproof coating to paint the gap of the bonding part;

[0030] Step S4: After the installation of the back-sticked water stop 2 is completed, the polyethylene foam board 13 is installed and fixed in the deformation joint, and the polyethylene foam board 13 has an arc portion 5 to 8 cm away from the concrete surface, and the arc portion of the polyethylene foam board 13 is used to reserve an arc groove with a length of 1 cm on each side. After the new concrete is poured and the mold is removed, the seam is cleaned to the reserved groove position, and then the sealing rubber tube 14 is installed to the groove position, and finally the external polysulfide sealing paste 3 is filled;

[0031] Step S5: cutting out the groove section during the deformation joint construction, and when it is impossible to reserve at the junction of the new and old parts, artificial grooving is adopted to ensure that the groove planes at both ends are level and without misalignment, and the concrete surface in the groove section is smooth;

[0032] Step S6: fix the stainless steel plate drainage groove 5 at the reserved groove section with the post-installed chemical anchor bolts 4, and apply flexible waterproof material on its surface and gaps to seal it.

[0033] In this embodiment, multiple waterproofing measures are taken, including setting the deformation joint, using the water-swellable waterstop strip 1 and the back-sticked waterstop strip 2, the stainless steel plate drainage trough 5, the polyethylene foam board 13, etc., to significantly improve the waterproof performance of the construction joint, thereby effectively solving the problem that the traditional method mostly adopts a single waterproofing measure, and its waterproofing effect is limited and it is difficult to meet the requirements of engineering safety and durability, especially where the concrete thickness changes, and the waterproofing is more difficult.

[0034] Among them, in step S3, the special adhesive material is one or more combinations of special adhesive glue or glass glue. The use of the special adhesive glue can provide strong bonding force to ensure the sealing and durability of the joint. The glass glue is used to seal the inner cavity at the joint of the deformed part to prevent it from becoming a weak link for water leakage.

[0035] Wherein, in step S3, half the width of the back-adhered waterstop strip 2 is adhered to the old concrete, and the cement nails 6 are arranged at a distance of every 50 cm, and the angle steels 11 are arranged at a distance of every 100 cm.

[0036] Wherein, in step S5, the depth of the groove section is 3 cm and the width is 30 cm.

[0037] Wherein, in step S6, the thickness of the stainless steel plate drainage groove 5 is 2 mm.

[0038] Wherein, in step S6, the post-placed chemical anchor bolts 4 are arranged at intervals of 80-120 cm, and a water receiving groove 8 is provided in the middle of the stainless steel plate drainage groove 5, through which part of the water flow can be conveniently received.

[0039] Through the above-mentioned construction method, the present invention realizes the effective application of multiple waterproofing measures in the secondary lining concrete, significantly improves the waterproofing performance of the construction joint, prolongs the service life of the project, and also meets the project's requirements for durability and safety.

[0040] What is disclosed above is only a preferred embodiment of the present invention, and it certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope of the invention.

Claims

1. A multi-layer waterproof structure for the deformation joint of the secondary lining of a variable-section tunnel after removal, characterized in that: It includes a water-swelling waterstop strip, a back-stick waterstop, a stainless steel plate drainage trough, a polyethylene foam board, cement nails and a sealing rubber tube. The back-stick waterstop strip is located at the joint of new and old concrete, and the joint is set as a deformation joint. The water-swelling waterstop strip is located at the deformation joint of the newly poured concrete, the stainless steel plate drainage trough is located at the reserved groove section during the construction of the deformation joint, and the polyethylene foam board is located in the deformation joint.

2. A method for multiple waterproofing construction of secondary lining deformation joints of variable cross-section tunnels after demolition, applied to the multiple waterproofing structure of secondary lining deformation joints of variable cross-section tunnels after demolition as claimed in claim 1, characterized in that: The steps include: Step S1: Set the joint between the new and old concrete as a deformation joint, and use professional equipment to accurately cut the joint opening to ensure that the joint opening size is accurate and the joint opening is neat; Step S2: installing the water-swelling waterstop strip at the newly cast concrete deformation joint by pre-embedding, taking positioning and stabilizing measures to ensure that the water-swelling waterstop strip is firmly and centrally installed; Step S3: Use a special adhesive material to firmly embed the back-sticking water stop into the deformation joint, fix it with the cement nails and angle steel, and then use a flexible waterproof coating to paint the gap of the bonding part; Step S4: After the installation of the back-sticked water stop is completed, the polyethylene foam board is installed and fixed in the deformation joint, and the polyethylene foam board has an arc portion 5 to 8 cm away from the concrete surface, and the arc portion of the polyethylene foam board is used to reserve an arc groove with a length of 1 cm on each side. After the new concrete is poured and the mold is removed, the joint is cleaned to the reserved groove position, and then the sealing rubber tube is installed to the groove position, and then filled with external polysulfide sealing paste; Step S5: cutting out the groove section during the deformation joint construction, and when it is impossible to reserve at the junction of the new and old parts, artificial grooving is adopted to ensure that the groove planes at both ends are level and without misalignment, and the concrete surface in the groove section is smooth; Step S6: fix the stainless steel plate drainage trough at the reserved trough section with post-installed chemical anchor bolts, and apply flexible waterproof material on the surface and gaps to seal them.

3. The multiple waterproof construction method for the deformation joint of the secondary lining of a variable cross-section tunnel after removal as claimed in claim 2, characterized in that: In step S3, the special adhesive material is one or more combinations of special adhesive glue or glass glue.

4. The multiple waterproof construction method for the deformation joint of the secondary lining of a variable cross-section tunnel after demolition as claimed in claim 3 is characterized in that: In step S3, half the width of the back-adhered waterstop is adhered to the old concrete, and the cement nails are arranged at a distance of 50 cm, and the angle steels are arranged at a distance of 100 cm.

5. The multiple waterproof construction method for the deformation joint of the secondary lining of a variable cross-section tunnel after demolition as claimed in claim 4 is characterized in that: In step S5, the depth of the groove section is 3 cm and the width is 30 cm.

6. The multiple waterproof construction method for the deformation joint of the secondary lining of a variable cross-section tunnel after removal as claimed in claim 5, characterized in that: In step S6, the thickness of the stainless steel plate drain groove is 2 mm.

7. The multiple waterproof construction method for the deformation joint of the secondary lining of a variable cross-section tunnel after demolition as claimed in claim 6, characterized in that: The post-placed chemical anchor bolts are arranged at intervals of 80-120 cm, and a water receiving trough is provided in the middle of the stainless steel plate drainage trough.

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