An assembled deformation joint waterproof structure and construction method for an open-cut tunnel

Abstract

The present invention relates to an assembled deformation joint waterproof structure for an open-cut tunnel and a construction method; the structure comprises a first concrete structure and a second concrete structure, the end of the first concrete structure is provided with a first end panel, the end of the second concrete structure is provided with a second end panel, the second end panel and the first end panel are matched with mortise and tenon joints to form a deformation joint between the two, and a sealing member is extruded and filled in the deformation joint. The present invention can change the direction of the deformation joint to form a labyrinth waterproof structure by matching the first end panel and the second end panel with mortise and tenon joints to form a deformation joint between the two, and a sealing member is arranged in the deformation joint, which can effectively improve the sealing and waterproofing effect of the deformation joint.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel deformation joints, and in particular to an assembled deformation joint waterproof structure for an open-cut tunnel and a construction method thereof. Background Art

[0002] Tunnels are long and narrow structures. Due to changes in geology and foundation properties, even under the same structure and cover soil, the deformation of the tunnel structure foundation will be different. When there are drastic changes in geology or sudden changes in the structure shape, the uneven settlement of the foundation will be more obvious, and the damage to the structure will be greater. In order to adapt to the structural deformation, a deformation joint needs to be set at a certain distance.

[0003] At present, the commonly used facilities for waterproofing the deformation joints of open-cut tunnels include waterstops and expansion rubber strips. The placement of waterstops is generally divided into two types: embedded type and external type. Figure 1 As shown, the existing open-cut tunnel expansion joint waterproof structure is equipped with an embedded waterstop 01, but the expansion joint waterstop is difficult to accurately locate and effectively protect, which leads to problems such as displacement, distortion, curling, and damage during concrete pouring, and the concrete near the waterstop is difficult to effectively vibrate, resulting in poor water-stopping effect and serious leakage. The expansion joint waterproofing problem has always been a technical problem in the industry. Therefore, an open-cut tunnel assembled expansion joint waterproofing structure and construction method are urgently needed to solve the above problems, achieve fast and high-quality construction, and reduce the risk of water leakage. Summary of the invention

[0004] In order to solve the above problems, on the one hand, the present invention provides an open-cut tunnel prefabricated deformation joint waterproof structure, including a first concrete structure and a second concrete structure, the end of the first concrete structure is provided with a first end panel, the end of the second concrete structure is provided with a second end panel, the second end panel and the first end panel are matched with mortise and tenon joints to form a deformation joint therebetween, and a sealing member is extruded and filled in the deformation joint.

[0005] Furthermore, the first end panel includes a first upper structure, a first middle structure and a first lower structure which are arranged in sequence from top to bottom, and the second end panel includes a second upper structure, a second middle structure and a second lower structure which are arranged in sequence from top to bottom; the second upper structure is arranged corresponding to the first upper structure, the second lower structure is arranged corresponding to the first lower structure, and the first middle structure and the second middle structure are matched with mortise and tenon joints to form a U-shaped groove.

[0006] Furthermore, the U-shaped slot includes a first slot segment, a second slot segment and a third slot segment which are connected in sequence, and the sealing member is arranged in the first slot segment and the third slot segment.

[0007] Furthermore, the first middle layer structure and the second middle layer structure are I-beam components, and the length direction of the I-beam components is parallel to the transverse direction of the tunnel; the notch of one of the I-beam components facing the deformation joint forms a mortise and tenon, and the side of the other I-beam component facing the deformation joint is inserted into the mortise and tenon to form a tenon.

[0008] Furthermore, a gap filler is filled between the second upper structure and the first upper structure, and a gap filler is filled between the second lower structure and the first lower structure.

[0009] Furthermore, limit stop strips are arranged on both sides of the sealing member.

[0010] Furthermore, the sealing member adopts a wedge-shaped rubber pad, and the installation direction of the wedge-shaped head of the sealing member is opposite to the water-facing side of the deformation joint.

[0011] Further, a first rib connected to concrete is disposed on a side of the first end panel facing the first concrete structure, and a second rib connected to concrete is disposed on a side of the second end panel facing the second concrete structure.

[0012] Furthermore, the second ribs at the upper and lower ends of the second end panel are wedge-shaped.

[0013] On the other hand, the present invention provides a construction method of an open-cut tunnel assembled deformation joint waterproof structure, comprising the following steps:

[0014] Step S1: assembling the first end panel and the second end panel, and installing a sealing member on the first end panel and / or the second end panel;

[0015] Step S2: Assembling the first end panel and the second end panel to form a deformation joint between the two, and fixing them by bolts to form a deformation joint waterproof structure body, and the squeezed sealing member fills the deformation joint between the first end panel and the second end panel;

[0016] Step S3: hoisting the assembled deformation joint waterproof structure body to the foundation pit for installation, and pouring concrete on both sides of the deformation joint waterproof structure body.

[0017] Due to the adoption of the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0018] 1) The open-cut tunnel assembled expansion joint waterproof structure and construction method provided by the present invention can change the direction of the expansion joint to form a labyrinth waterproof structure by using the mortise and tenon joints of the first end panel and the second end panel to form an expansion joint between the two. A sealing member is arranged in the expansion joint to effectively improve the sealing and waterproof effect of the expansion joint.

[0019] 2) The present invention provides an assembled expansion joint waterproof structure and construction method for an open-cut tunnel. The first end panel and the second end panel can be assembled using prefabricated components, which have a good match with the tunnel cross-section structure, can be assembled quickly, and the construction speed is improved. The construction work surface is small, and high-quality and efficient construction is ensured;

[0020] 3) The present invention provides an assembled expansion joint waterproof structure and construction method for an open-cut tunnel. The seal, the first end panel and the second end panel can be assembled with prefabricated components, which is convenient for adjusting the structure and size, and has a good waterproof effect. The seal is constrained from deformation and displacement by setting a limit stop bar, and the positioning is accurate, which will not affect the pouring of tunnel structure concrete, and avoids waterproof failure caused by vibration during construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a deformation joint waterproof structure in the prior art;

[0022] Figure 2 A schematic diagram of the structure of the assembled deformation joint waterproof structure for an open-cut tunnel provided by the present invention;

[0023] Figure 3 A schematic diagram of the structure of a U-shaped slot in an open-cut tunnel prefabricated deformation joint waterproof structure provided by the present invention;

[0024] Figure 4 A schematic diagram of a first end panel and a second end panel of an open-cut tunnel assembled deformation joint waterproof structure provided by the present invention;

[0025] Figure 5 A schematic diagram of the assembly of a first end panel and a second end panel of an open-cut tunnel assembled deformation joint waterproof structure provided by the present invention;

[0026] Figure 6 A schematic diagram of completely or partially removing nuts before pouring the second concrete structure of the open-cut tunnel assembled deformation joint waterproof structure provided by the present invention;

[0027] Figure 7 A schematic diagram of the full-ring assembly of the prefabricated deformation joint waterproof structure for an open-cut tunnel provided by the present invention.

[0028] 01-waterstop; 10-first end panel; 11-first upper structure; 12-first middle structure; 13-first lower structure; 14-first rib; 15-water receiving box; 20-second end panel; 21-second upper structure; 22-second middle structure; 23-second lower structure; 24-second rib; 30-deformation joint; 31-U-shaped slot; 311-first slot section; 312-second slot section; 313-third slot section; 40-seal; 41-limiting strip; 50-mortise and tenon assembly; 51-mortise; 52-tenon; 60-bolt; 61-bolt hole; 62-stiffening strip; 63-waterstop component; 70-caulking material; 80-first concrete structure; 90-second concrete structure. 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 in 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. In the drawings, the size and relative size of some parts may be enlarged for clarity.

[0030] In the description of the present invention, unless otherwise clearly stipulated and limited, the terms "connection" and "connected" should be interpreted 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In the description of the present invention, terms such as "up", "down", "left", "right", "front", "back", etc., and the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0032] In addition, in the description of the present invention, the terms "first" and "second" are only used to distinguish in the description.

[0033] Example 1

[0034] As the instruction manual Figure 2As shown, the present invention provides an open-cut tunnel assembled deformation joint waterproof structure, including a first concrete structure 80 and a second concrete structure 90, wherein a first end panel 10 is provided at the end of the first concrete structure 80, and a second end panel 20 is provided at the end of the second concrete structure 90, the second end panel 10 and the first end panel 20 are matched with mortise and tenon joints to form a deformation joint 30 therebetween, and a sealing member 40 is extruded and filled in the deformation joint 30.

[0035] Preferably, at least one mortise and tenon assembly 50 is provided at the longitudinal connection between the first end panel 10 and the second end panel 20. The first end panel 10 and the second end panel 20 are matched by the mortise and tenon assembly 50. On the one hand, it is convenient for the two end molds to be quickly aligned and positioned for assembly. On the other hand, the direction of the deformation joint 30 can be changed to form a labyrinth waterproof structure. By setting the sealing member 40, the waterproof effect can be effectively improved. The number of the mortise and tenon assembly 50 can be set according to actual conditions. In this embodiment, one mortise and tenon assembly 50 is set between the first end panel 10 and the second end panel 20 for mortise and tenon matching.

[0036] Preferably, the first end panel 10 and the second end panel 20 assembled into the deformation joint waterproof structure are prefabricated parts, which can be prefabricated in a factory and can be arranged according to the tunnel section form and construction requirements; the first concrete structure 80 and the second concrete structure 90 are respectively arranged on both sides of the deformation joint waterproof structure, and the concrete structure is a prefabricated concrete structure or a cast-in-place concrete structure, preferably a cast-in-place concrete structure, and the concrete structure on the connection side of the first end panel 10 is a precast tunnel structure, and the concrete structure on the connection side of the second end panel 20 is a post-cast tunnel structure; specifically, in actual use, the first end panel 10 and the second end panel 20 also serve as temporary end templates.

[0037] The longitudinal expansion and contraction deformation of the expansion joint waterproof structure is △D:

[0038] △D=△LFormula (1)

[0039] △L=α c ·△T·L formula (2)

[0040] In formula (2), △L is the change in size of the tunnel structure due to thermal expansion and contraction; α c is the linear expansion coefficient of concrete (1×10 -5 / ℃); △T is the temperature difference; L is the segment length of the tunnel structure (i.e. the clear distance between two adjacent deformation joints).

[0041] Preferably, the uneven settlement difference ΔH of the first-cast section tunnel structure 80 and the post-cast section tunnel structure 90 on both sides of the deformation joint, and the allowable value of the differential settlement ΔH on both sides of the deformation joint of the tunnel structure is generally 5 to 10 mm.

[0042] According to an optimized implementation scheme, the first end panel 10 includes a first upper structure 11, a first middle structure 12 and a first lower structure 13 which are arranged in sequence from top to bottom, and the second end panel 20 includes a second upper structure 21, a second middle structure 22 and a second lower structure 23 which are arranged in sequence from top to bottom; the second upper structure 21 is arranged corresponding to the first upper structure 11, the second lower structure 23 is arranged corresponding to the first lower structure 13, and the first middle structure 12 and the second middle structure 22 are matched with mortise and tenon joints to form a U-shaped groove 31.

[0043] Optimize the implementation method, as shown in the attached manual Figure 3 As shown, the U-shaped slot 31 includes a first slot segment 311, a second slot segment 312 and a third slot segment 313 which are connected in sequence, and a seal 40 is respectively provided in the first slot segment 311 and the third slot segment 313; of course, a seal 40 can also be provided in the deformation joint 30 between the second upper structure 21 and the first upper structure 11, and / or a seal 40 can be provided in the deformation joint 30 between the second lower structure 23 and the first lower structure 13; so as to improve the sealing and waterproof effect.

[0044] Optimize the implementation method, as shown in the attached manual Figure 4-6 As shown, the mortise and tenon assembly 50 includes a mortise groove 51 and a tenon 52 that are mortised to each other. The tenon 52 can be inserted into the mortise groove 51 to achieve mortise. One of the first end panel 10 and the second end panel 20 is provided with a mortise groove 51, and the other is provided with a tenon 52 that matches the mortise groove 51. In this embodiment, the first middle layer structure 12 is provided with a mortise groove 51 on one side facing the deformation joint 30, and the second middle layer structure 22 is provided with a tenon 52 on one side facing the deformation joint 30. The seal 40 is provided between the tenon 52 and the mortise groove 51, and is used to seal the deformation joint 30 between the first end panel 10 and the second end panel 20. Preferably, in order to improve the sealing effect, the number of the seal 40 is at least one. In this embodiment, two seals 40 are provided, and the seals 40 are sequentially provided between the tenon 52 and the mortise groove 51. When the first end panel 10 and the second end panel 20 are assembled, the seal 40 can be squeezed, and the seal 40 fills the gap between the two end molds to achieve a waterproof effect.

[0045] Specifically, the first end panel 10 includes a first upper structure 11, a first middle structure 12 and a first lower structure 13, which are arranged in sequence from top to bottom, and the second end panel 20 includes a second upper structure 21, a second middle structure 22 and a second lower structure 23, which are arranged in sequence from top to bottom. Preferably, the first end panel 10 is an integral structure or a split structure, and the second end panel 20 is an integral structure or a split structure, which can be arranged according to actual needs. In this embodiment, the first end panel 10 and the second end panel 20 are split structures, and the first upper structure 11, the first middle structure 12, the first lower structure 13, the second upper structure 21, the second middle structure 22 and the second lower structure 23 are preferably steel plates or steel components, and the component materials can be steel or other new materials with similar properties. The mortise and tenon 51 is a groove formed on the side of the first middle layer structure 12 facing the second middle layer structure 22, and the tenon 52 is a protrusion formed on the side of the second middle layer structure 22 facing the first middle layer structure 21, and the protrusion can be adaptively inserted into the groove to form a mortise and tenon fit. The first upper structure 11 and the second upper structure 21 are correspondingly arranged and connected by bolts 60 (the bolts can be fully or partially removed), and the first lower structure 13 and the second lower structure 23 are correspondingly arranged and connected by bolts 60, so that the first end panel 10 and the second end panel 20 can be quickly assembled; during the assembly process of the first end panel 10 and the second end panel 20, after positioning the two, the tenon 52 is inserted into the mortise and tenon 51, and the two end molds are fixed by bolts 60 to realize the assembly of the main body of the waterproof structure.

[0046] Specifically, the first middle layer structure 12 and the second middle layer structure 22 include at least one groove facing the deformation joint 30 for forming a mortise and tenon 51, and the mortise and tenon cooperate to form a U-shaped groove 31. The groove can be set on the first middle layer structure 12, or on the second middle layer structure 22, or both the first middle layer structure 12 and the second middle layer structure 22 are provided with grooves, and the structure of the tenon can be set according to actual needs.

[0047] As one of the implementation modes, the first middle layer structure 12 adopts a C-shaped steel member, and the second middle layer structure 22 adopts a C-shaped steel member. The notch of the first middle layer structure 12 is arranged toward the deformation joint 30 to form a mortise 51, and the notch of the second middle layer structure 22 can be arranged toward the deformation joint 30 or away from the deformation joint to form a tenon 52. The tenon 52 cooperates with the tenon 51 to form a U-shaped groove 31, which can realize the rapid positioning and assembly of the first end panel 10 and the second end panel 20; of course, the notch of the second middle layer structure 12 can also be arranged toward the deformation joint 30 to form the mortise 51, and the notch of the first middle layer structure 12 can be arranged toward or away from the deformation joint 30 to form the tenon 52; the notch is arranged away from the deformation joint 30, so that when pouring concrete, the concrete can fill the notch to enhance the connection reliability between the end panel and the concrete.

[0048] As one of the embodiments, the first middle layer structure 12 and the second middle layer structure 22 are respectively a first I-beam member and a second I-beam member, and the length direction of the first I-beam member and the second I-beam member is parallel to the transverse direction of the tunnel; the notch of the first I-beam member facing the deformation joint 30 forms a mortise 51, and the side of the second I-beam member facing the deformation joint 30 is inserted into the mortise 51 to form a tenon 52. Specifically, the notch of the first I-beam member away from the deformation joint is filled with concrete to improve the connection reliability of the first end panel 10 and the first concrete structure 80, and at the same time, the notch of the second I-beam member away from the deformation joint is filled with concrete to improve the connection reliability of the second end panel 20 and the second concrete structure 90. Specifically, when the first end panel 10 and the second end panel 20 are assembled, the second I-beam member is pushed into the first I-beam member along the center line of the joint until the straight seam spacing between the first end panel 10 and the second end panel 20 is equal to the designed deformation joint width of the tunnel structure.

[0049] As one of the implementation modes, one of the first middle layer structure 12 and the second middle layer structure 22 can use an I-beam member as the tenon or mortise, and the other can use a C-shaped steel member as the mortise and tenon matching structure. The setting form is the same as above, so it will not be repeated here.

[0050] Of course, the first middle layer structure and the second middle layer structure may also be formed of other steel sections or steel plates that can form a U-shaped groove.

[0051] In an optimized implementation mode, the first upper structure 11, the second upper structure 21, the first lower structure 13 and the second lower structure 23 are L-shaped steel members, the length direction of the L-shaped steel member is parallel to the transverse direction of the tunnel, the first upper structure 11 and the first lower structure 13 are welded to the upper and lower ends of the first middle structure 12, respectively, and the first upper structure 11 and the first lower structure 13 are installed at the end of the first middle structure 12 facing the second end panel 20, and the second upper structure 21 and the second lower structure 23 are welded to the upper and lower ends of the second middle structure 22, respectively. Preferably, the L-shaped steel member includes a first panel and a second panel, the first panels of the first upper structure 11 and the second upper structure 21 are arranged opposite to each other, and the second panels of the first upper structure 11 and the second upper structure 21 are arranged at an end away from the mortise and tenon assembly 50; the first panels of the first lower structure 13 and the second lower structure 23 are arranged opposite to each other, and the second panels of the first lower structure 13 and the second lower structure 23 are arranged at an end away from the mortise and tenon assembly.

[0052] Preferably, during the installation of the deformation joint waterproof structure and the tunnel structure, the first end panel 10 and the second end panel 20 have sizes matching the first-casting tunnel structure and the last-casting tunnel structure, respectively.

[0053] In an optimized implementation manner, a sealant 70 is filled between the second upper structure 21 and the first upper structure 11, and a sealant 70 is filled between the second lower structure 23 and the first lower structure 13; the sealant is preferably a viscous waterproof sealant, and the viscous waterproof sealant is arranged along the through seam between the first end panel 10 and the second end panel 20 of the deformation joint structure.

[0054] In an optimized implementation manner, limit strips 41 are provided on both sides of the seal 40. Specifically, the limit strips 41 and the seal 40 can be bonded to the first intermediate structure 12 or the second intermediate structure 22 by an adhesive; when the second end panel 20 is pushed into the first end panel 10 or the first-cast section tunnel structure and the later-cast section tunnel structure undergo longitudinal and lateral differential deformation or relative displacement within an allowable range during the construction period and the operation period, the limit strips 41 have the function of limiting the longitudinal deformation or displacement of the seal 40, and prevent it from being pulled off or squeezed out, thereby ensuring the effectiveness of the seal 40 during its service life.

[0055] When the first end panel 10 and the second end panel 20 are assembled, the gap S between the first intermediate structure 12 and the second intermediate structure 22 d >△D.

[0056] In an optimized implementation mode, the seal 40 adopts a wedge-shaped rubber pad, and the installation direction of the wedge-shaped head of the seal 40 is opposite to the water-facing side of the deformation joint; the seal 40 can be made of rubber materials such as EPDM or other materials with high-quality elasticity, heat resistance, oxidation resistance, ozone resistance and corrosion resistance; the size and performance of the seal 40 can meet the waterproof requirements of the deformation joint 30 after the allowable opening and misalignment deformation occurs.

[0057] In this embodiment, the sealing member 40 is preferably a wedge-shaped porous EPDM rubber pad, and its waterproof capability should be sufficient to resist water pressure after reaching the maximum allowable shear deformation and the maximum tensile deformation.

[0058] Specifically, the longitudinal tensile deformation value S that the seal 40 needs to adapt to is L :

[0059] S L =△D formula (3)

[0060] The shear displacement deformation value S that the deformation joint 30 needs to adapt to Q :

[0061] S Q =△H formula (4)

[0062] The minimum compression dimension S of the seal 40 is allowed y :

[0063] S y =h f -S Q Formula (5)

[0064] In formula (5), h f It is the distance between the end surface of the second intermediate structure on which the seal is installed and the corresponding first intermediate structure (or the distance between the end surface of the first intermediate structure on which the seal is installed and the corresponding second intermediate structure).

[0065] The maximum opening dimension S of the seal 40 is Z :

[0066] S z =h f +S Q Formula (6)

[0067] The sealing member 40 has a waterproof capability W of:

[0068] W ≥ K·F 水 Formula (7)

[0069] In formula (7), K is the safety factor and aging factor, which can be taken as 2.0; F 水 To prevent water pressure.

[0070] In an optimized implementation mode, a first rib 14 is provided on the side of the first upper structure 11, the first I-beam member and the first lower structure 13 facing the first concrete structure 80, a second rib 24 is provided on the side of the second upper structure 21, the second I-beam member and the second lower structure 23 facing the second concrete structure 90, and at the same time, a second rib 24 is also provided in the notch of the second I-beam member facing the deformation joint 30, and the function of the ribs is to make the shape of the first end panel 10 and the second end panel 20 stable and not deformed during the whole construction process; the first end panel 10 and the second end panel 20 are respectively reliably connected to the end steel bars of the adjacent first concrete structure 80 and the second concrete structure 90, and then the first concrete structure 80 and the second concrete structure 90 are cast in sequence, and the first rib 14 and the second rib 24 are respectively cast in the first concrete structure 80 and the second concrete structure 90, which can improve the connection reliability between the first end panel 10 and the first concrete structure 80 and the connection reliability between the second end panel 20 and the second concrete structure 90. The deformation joint waterproof structure, the first concrete structure 80 and the second concrete structure 90 together form a deformation joint water-stopping system.

[0071] In order to improve the connection reliability between the end panel and the concrete structure, preferably, anchor steel bars are further provided between the first end panel 10 and the first concrete structure 80 , and anchor steel bars are further provided between the second end panel 20 and the second concrete structure 90 .

[0072] In an optimized implementation manner, the first rib 14 is square, the second rib 24 at the notch connection of the second I-beam member is square, and the second rib 24 at the connection with the second upper structure 21 has a decreasing distance from the end away from the second upper structure 21 from the top to the bottom; the second rib 24 at the connection with the second lower structure 23 has an increasing distance from the end away from the second lower structure 23 from the top to the bottom, which can improve the strength of the second end panel 20.

[0073] The first ribs 14 and the second ribs 24 are preferably steel plates or steel components, and the component materials may be steel or other new materials with similar properties.

[0074] In an optimized implementation manner, stiffening strips 62 are provided on both sides of the bolt holes 61 for setting the bolts 60 of the first end panel 10 and the second end panel 20. The function of the stiffening strips 62 is to enhance the deformation resistance of the structure near the bolt holes 61 of the first end panel 10 and the second end panel 20.

[0075] When the first end panel 10 and the second end panel 20 are aligned and assembled, the corresponding bolt holes 61 are aligned and fixed by bolts 60 and nuts. Waterstop components 63 are provided at the bolt holes 61 of the first end panel 10 and the second end panel 20, wherein the first end panel 10 is provided with a nut-end bolt hole waterstop steel cap, and the second end panel 20 is provided with a nut-end bolt hole waterstop steel cap or a waterstop steel plate; the waterstop component 63 is preferably a steel component or other new material components with similar properties.

[0076] In an optimized implementation manner, a water receiving box 15 is provided downstream of the deformation joint 30 , and the water receiving box 15 is connected to the first lower structure 13 and the second lower structure 23 .

[0077] Example 2

[0078] On the other hand, the present invention also provides a construction method of an open-cut tunnel assembled deformation joint waterproof structure, comprising the following steps:

[0079] 1) First, according to the cross-sectional type of the tunnel structure at each deformation joint, the components of the first end panel 10 and the second end panel 20 of the deformation joint waterproof structure are classified and prefabricated in blocks; the specific block length is set according to the cross-sectional type and construction requirements.

[0080] Specifically, the factory classifies and blocks the components of the assembled deformation joint structure in a standardized manner. The above components include the first end panel 10, the second end panel 20, the first rib 14, the second rib 24, the stiffening strip 62, the seal 40, the limit stopper 41, the bolt 60, the water stop member 63, etc. First, according to the cross-sectional type of the tunnel structure at the deformation joint, the components are classified, the overall size is determined, and the block size is determined; standardized prefabrication can be performed according to the component classification and the component block size.

[0081] 2) Position and splice the prefabricated component blocks according to the tunnel cross-section pattern at the deformation joint, weld and assemble them into a ring, and complete the assembly of the first end panel 10 and the second end panel 20, as shown in the attached manual. Figure 4 shown.

[0082] 3) Adhere the adhesive sealant to the first end panel 10 or the second end panel 20 , and fix the seal 40 and the limit stop strip 41 at the corresponding positions of the first intermediate structure 12 and the second intermediate structure 22 .

[0083] Specifically, the seal 40 can be prefabricated in a factory. The material, cross-sectional dimensions and shape of the seal 40 are determined through numerical simulation and model testing. The length of the seal 40 is determined according to the cross-sectional dimensions of the tunnel structure at the deformation joint and the positioning of the seal 40 in the assembled deformation joint. The seal 40 is prefabricated in the factory. After prefabrication, it is installed on the first end panel 10 and the second end panel 20 according to the positioning, and the adhesive sealant is pasted on the first end panel 10 and the second end panel 20.

[0084] 4) The first end panel 10 and the second end panel 20 are assembled in an integrated manner, and the second intermediate structure 22 of the second end panel 20 is pushed into the first intermediate structure 12 of the first end panel 10 along the assembly center line until the straight seam spacing between the first end panel 10 and the second end panel 20 is equal to the designed deformation seam width of the tunnel structure.

[0085] 5) Install the bolts 60 and tighten them with the nuts to complete the assembly of the prefabricated deformation joint structure; install the water stop component 63 on the first end panel. Figure 7 shown.

[0086] The above assembly process can be carried out in a factory or on site, which can save construction time on the one hand and reduce construction difficulty on the other hand.

[0087] 6) The assembled deformation joint waterproof structure is hoisted into the foundation pit for installation and fixation, and the first end panel 10 and the second end panel 20 are reliably connected to the steel bars at the ends of the first-cast tunnel structure and the post-cast tunnel structure on both sides.

[0088] 7) Complete the pouring of concrete for the first section of the tunnel structure.

[0089] 8) After the concrete of the first cast-in-place structure reaches the designed strength, the nuts are completely or partially removed according to operational needs, and the corresponding water-stopping components 63 are welded on the second end panel 20 .

[0090] 9) After the pouring of the concrete of the post-cast section tunnel structure is completed, a deformation joint water-stopping system is formed.

[0091] Those skilled in the art will appreciate that the present invention can be implemented in many other specific forms without departing from the spirit and scope of the present invention. Although embodiments of the present invention have been described, it should be understood that the present invention should not be limited to this embodiment, and those skilled in the art can make changes and modifications within the spirit and scope of the present invention as defined by the appended claims.

Claims

1. A construction method for an open-cut tunnel assembled deformation joint waterproof structure, characterized in that: The waterproof structure comprises a first concrete structure and a second concrete structure, the first concrete structure is provided with a first end panel at an end thereof, the second concrete structure is provided with a second end panel at an end thereof, the second end panel and the first end panel are matched with each other by mortise and tenon joints and a deformation joint is formed therebetween, and a sealing member is extruded and filled in the deformation joint; the first end panel comprises a first upper structure, a first middle structure and a first lower structure arranged in sequence from top to bottom, and the second end panel comprises a second upper structure, a second middle structure and a second lower structure arranged in sequence from top to bottom; the second upper structure is arranged correspondingly to the first upper structure, and the second lower structure is arranged correspondingly to the first lower structure, the first middle structure and the second middle structure are matched with each other by mortise and tenon joints to form a U-shaped slot, and the U-shaped slot comprises a first slot segment, a second slot segment and a third slot segment connected in sequence, and the sealing member is arranged in the first slot segment and the third slot segment; The construction method of the waterproof structure comprises the following steps: Step S1: assembling the first end panel and the second end panel, and installing a sealing member on the first end panel and / or the second end panel; Step S2: Assemble the first end panel and the second end panel to form a deformation joint between the two, and fix them by bolts to form a deformation joint waterproof structure body, and the squeezed sealing member is filled in the deformation joint between the first end panel and the second end panel; wherein the middle part of the first end panel and the middle part of the second end panel are matched with mortise and tenon joints to form a U-shaped groove, and the first groove section and the third groove section of the U-shaped groove are filled with the sealing member; Step S3: hoist the assembled deformation joint waterproof structure body to the foundation pit for installation, connect the first end panel and the second end panel to the steel bars at the ends of the first-cast tunnel structure and the later-cast tunnel structure on both sides respectively, complete the pouring of the concrete of the first-cast tunnel structure, and after the poured concrete of the first-cast structure reaches the design strength, remove all or part of the bolts on the deformation joint waterproof structure body, complete the pouring of the concrete of the later-cast tunnel structure, and form a deformation joint water-stopping system.

2. The construction method of the open-cut tunnel assembled deformation joint waterproof structure according to claim 1 is characterized in that: The first middle layer structure and the second middle layer structure are I-beam components, and the length direction of the I-beam components is parallel to the transverse direction of the tunnel; A notch of one of the I-beam components facing the deformation joint forms a mortise groove, and a side of the other I-beam component facing the deformation joint is inserted into the mortise groove to form a tenon.

3. The construction method of the open-cut tunnel assembled deformation joint waterproof structure according to claim 1 is characterized in that: A gap filler is filled between the second upper structure and the first upper structure, and a gap filler is filled between the second lower structure and the first lower structure.

4. The construction method of the open-cut tunnel assembled deformation joint waterproof structure according to claim 1 is characterized in that: Limit stop strips are arranged on both sides of the sealing member.

5. The construction method of the open-cut tunnel assembled deformation joint waterproof structure according to claim 1 is characterized in that: The sealing member adopts a wedge-shaped rubber pad, and the installation direction of the wedge-shaped head of the sealing member is opposite to the water-facing side of the deformation joint.

6. The construction method of the open-cut tunnel assembled deformation joint waterproof structure according to claim 1 is characterized in that: A first rib connected to concrete is disposed on a side of the first end panel facing the first concrete structure, and a second rib connected to concrete is disposed on a side of the second end panel facing the second concrete structure.

7. The construction method of the open-cut tunnel assembled deformation joint waterproof structure according to claim 6 is characterized in that: The second ribs at the upper and lower ends of the second end panel are wedge-shaped.

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