Temporary mid-partition and temporary cofferdam combined structure of river bottom communication project and construction method of temporary mid-partition and temporary cofferdam combined structure

Abstract

The invention discloses a river bottom communication project temporary middle partition wall and temporary cofferdam combined structure and a construction method thereof.The combined structure comprises a soil bag cofferdam built and stacked between a top plate and a temporary middle partition wall and a settlement deformation waterproof structure arranged at the corner of the top plate and the temporary middle partition wall and shielded by the soil bag cofferdam; the settlement deformation waterproof structure comprises a deformation groove, an inner waterproof coiled material, a settlement angle plate, an expansion bolt, a base plate and an outer waterproof coiled material, wherein the inner waterproof coiled material is laid at the deformation groove or at least on the bottom surface of the deformation groove in a non-adhesive manner; a vertical plate of the settlement angle plate is provided with strip-shaped holes or waist-shaped holes which are vertically distributed; the outer waterproof coiled material is provided with a non-adhesive laid folded edge at a gap between the lower surface of the settlement angle plate and the leveling layer, and a rubber water stop rod filled in the folded edge between the transverse plate of the settlement angle plate and the leveling layer. The waterproof paint has the advantages of environmental protection, low cost and good waterproof effect.

Description

Technical Field

[0001] The invention relates to the field of riverbed connection engineering, and in particular to a combined structure of a temporary intermediate partition wall and a temporary cofferdam for a riverbed connection engineering and a construction method thereof. Background Art

[0002] When a large building complex crosses a river, the plots on both sides are connected by passing under the riverbed to achieve overall connectivity of the underground passage. Riverbed construction projects are usually constructed in the manner of "half-width construction, half-width water flow, phased diversion, and non-flood season interruption". Figure 1 This is a schematic diagram of the elevation structure of the temporary middle partition wall and temporary cofferdam of the riverbed connection project in the prior art, which are independently set apart from each other. Please refer to Figure 1 In order to meet the purpose of half-width water-passing construction, the river channel engineering designer installed reinforced concrete walls 2 and reinforced concrete buttresses 3 as temporary cofferdams in the middle of the river channel; in order to meet the purpose of half-width construction of the underground passage of the riverbed engineering, the construction engineering designer installed a temporary middle partition wall 1 in the middle of the river channel. The temporary cofferdam and the temporary middle partition wall 1 are independent of each other and have a spacing distance. The disadvantage is that the construction and demolition of the temporary cofferdam wall is a key route project for the riverbed underground passage project, which directly affects the construction progress, not only the construction cost is high, but also causes serious waste of materials; the spacing distance left between the temporary cofferdam and the temporary middle partition wall 1 affects the width of the water area in the half-width water-passing river channel. Figure 2 This is a schematic diagram of the elevation structure of the existing technology of the temporary cofferdam being removed and the plain concrete ridge being sealed; please refer to Figure 2 After the temporary cofferdam is dismantled, it is necessary to construct a plain concrete ridge to seal the dismantling node, and the waterproof effect at the dismantling node is difficult to guarantee. Summary of the invention

[0003] The purpose of the present invention is to provide a combined structure of a temporary middle partition wall and a temporary cofferdam for a riverbed connection project and a construction method thereof, so as to solve the problems of construction progress of a temporary cofferdam wall construction and demolition construction of a riverbed underground passage, high construction cost, serious material waste, the spacing distance between the temporary cofferdam and the temporary middle partition wall affecting the width of the water area in the half-width river channel, and poor waterproofing effect of the nodes after the temporary cofferdam wall is demolished.

[0004] In order to solve the above technical problems, the technical solution provided by the present invention is: a combined structure of a temporary middle partition wall and a temporary cofferdam for a riverbed connection project, comprising an earth bag cofferdam stacked between the top plate of the underground structure in the advance area and the temporary middle partition wall, and a settlement deformation waterproof structure provided at the corner of the top plate and the temporary middle partition wall and shielded by the earth bag cofferdam;

[0005] The settlement deformation waterproof structure includes a deformation groove left between the slope layer and the leveling layer sequentially constructed on the top plate of the underground structure in the advance area and the temporary middle partition wall, and the inner waterproof membrane continuously laid on the leveling layer and the temporary middle partition wall through the deformation groove, wherein the inner waterproof membrane located at the deformation groove is not laid with adhesive or the inner waterproof membrane at least on the bottom surface of the deformation groove is not laid with adhesive; a settlement angle plate on the temporary middle partition wall above the deformation groove is provided by expansion bolts, and the settlement angle plate connected to the expansion bolts is The vertical plate is provided with vertically distributed strip holes or waist-shaped holes; a pad is provided on the head of the expansion bolt covering the vertical plate exposed from the settlement angle plate, and an outer waterproof membrane is laid on the outer surface of the settlement angle plate and the pad and extends to the inner waterproof membrane of the temporary middle partition wall and the inner waterproof membrane of the leveling layer. The outer waterproof membrane is reserved with a non-adhesive folded edge in the gap between the lower surface of the settlement angle plate and the leveling layer, and a rubber water stop rod is filled in the folded edge between the horizontal plate of the settlement angle plate and the leveling layer.

[0006] Furthermore, the temporary intermediate partition wall and temporary cofferdam of the riverbed connection project provided by the present invention are jointly constructed, and the deformation groove is U-shaped.

[0007] Furthermore, the temporary intermediate partition wall and temporary cofferdam of the riverbed connection project provided by the present invention are combined into a structure, wherein the pad is a wooden board.

[0008] Furthermore, the temporary intermediate partition wall and temporary cofferdam of the riverbed connection project provided by the present invention are jointly constructed, and the base plate is an extruded plate.

[0009] Furthermore, the temporary middle partition wall and temporary cofferdam of the riverbed connection project provided by the present invention are jointly constructed, and an isolation layer is constructed on the external waterproof membrane.

[0010] Furthermore, the temporary middle partition wall and temporary cofferdam combined structure of the riverbed connection project provided by the present invention is provided with reinforcing angle plates on the corners of the leveling layer, slope layer and deformation groove of the top plate, the transverse edges of the reinforcing angle plates are arranged on the leveling layer, and the vertical edges of the reinforcing angle plates are arranged on the end faces of the leveling layer and slope layer at the ends where the deformation groove is located.

[0011] Furthermore, the temporary middle partition wall and temporary cofferdam of the riverbed connection project provided by the present invention are jointly constructed, and before the internal waterproof membrane is laid on the temporary middle partition wall, a cement mortar leveling layer is constructed on the temporary middle partition wall.

[0012] Furthermore, the temporary middle partition wall and temporary cofferdam of the riverbed connection project provided by the present invention are jointly constructed, and the inner waterproof membrane is two-layered.

[0013] Furthermore, the temporary middle partition wall and temporary cofferdam of the riverbed connection project provided by the present invention are jointly constructed, and the water-facing surface of the earthbag cofferdam has a diversion slope.

[0014] In order to solve the above technical problems, another technical solution provided by the present invention is: a construction method for the combined structure of a temporary intermediate partition wall and a temporary cofferdam in a riverbed connection project, comprising:

[0015] A slope layer and a leveling layer are constructed on the top plate of the underground structure in the advance area, and deformation grooves are left at a predetermined distance between the slope layer and the leveling layer and the temporary middle partition wall;

[0016] The internal waterproofing membrane is continuously laid on the leveling layer of the top plate, the deformation groove and the temporary middle partition wall, wherein the internal waterproofing membrane on the leveling layer of the top plate and the temporary middle partition wall is laid by bonding, and the internal waterproofing membrane is not laid by bonding at the deformation groove or at least on the bottom surface of the deformation groove;

[0017] A settlement angle plate is arranged on the temporary middle partition wall above the deformation groove by means of expansion bolts, wherein the vertical plate of the settlement angle plate is attached to the inner waterproofing membrane of the temporary middle partition wall, the horizontal plate of the settlement angle plate is parallel and suspended above the leveling layer of the top plate, and the vertical plate of the settlement angle plate is provided with strip holes or waist-shaped holes distributed vertically and connected with the expansion bolts;

[0018] A pad is provided on the vertical plate of the settlement angle plate to cover the exposed head of the expansion bolt;

[0019] An outer waterproofing membrane is bonded and laid along the inner waterproofing membrane of the temporary middle partition wall, the outer surface of the settlement angle plate and the pad thereon, and the inner waterproofing membrane on the leveling layer on the top plate, wherein the outer waterproofing membrane is provided with a folding edge which is not bonded and laid between the lower surface of the settlement angle plate and the leveling layer, and the folding edge is reserved on the projection of the deformation groove;

[0020] A rubber water stop rod is filled in the folded edge between the transverse plate of the settlement angle plate and the leveling layer on the top plate;

[0021] Earthbags filled with impermeable soil are piled up between the temporary middle partition wall and the leveling layer of the top plate and the external waterproof membrane covering the settlement angle plates and pads to form an earthbag cofferdam as a half-width water-passing cofferdam.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The combined structure of a temporary middle partition wall and a temporary cofferdam for a riverbed connection project provided by the present invention and the construction method thereof eliminate the reinforced concrete structure of the river channel engineering designer and the temporary cofferdam which is spaced apart from the temporary middle partition wall of the construction project constructor, and adopt an earthbag cofferdam to be built and stacked on the temporary middle partition wall to form a combined structure of the temporary middle partition wall and the temporary cofferdam, wherein the earthbag cofferdam can be recycled and reused, has the advantages of being green, environmentally friendly and low in cost, thereby avoiding the problems of high construction cost and serious material waste caused by the new construction and demolition construction of the temporary cofferdam of the reinforced concrete structure; in addition, the earthbag cofferdam is attached to the temporary middle partition wall as a temporary cofferdam without leaving a spacing, thereby not affecting the width of the water area in the half-width river channel through which water passes.

[0024] The combined structure of the temporary middle partition wall and temporary cofferdam of the riverbed connection project provided by the present invention and the construction method thereof, through the two waterproof rolls formed by the inner waterproof roll laid on the leveling layer of the top plate of the underground structure in the advance area and the temporary middle partition wall and the outer waterproof roll constructed on the outer surface of the settlement angle plate and the pad plate and extending to the inner waterproof roll of the temporary middle partition wall and the inner waterproof roll of the leveling layer, to prevent the water in the river channel from penetrating through the earth bag cofferdam to the other side of the temporary middle partition wall, thereby improving the water retaining effect of the earth bag cofferdam through the inner and outer waterproof rolls. By setting a pad on the head of the expansion bolt of the vertical plate exposed on the settlement angle plate, the outer waterproof roll material is prevented from being punctured by the head of the expansion bolt exposed on the surface when laid on the settlement angle plate, thereby ensuring the waterproof effect at the settlement angle plate.

[0025] The present invention provides a combined structure of a temporary middle partition wall and a temporary cofferdam for a riverbed connection project and a construction method thereof. In a settlement deformation waterproof structure, a settlement angle plate is arranged on the temporary middle partition wall above the deformation groove through expansion bolts. When foundation pit settlement occurs during the construction of the underground passage project, the temporary middle partition wall synchronously descends, and the expansion bolts slide downward relative to the strip holes or waist-shaped holes of the settlement angle plate to maintain or reduce the settlement distance of the settlement angle plate, so as to provide a vertical displacement for the temporary middle partition wall when the foundation pit settles through the settlement angle plate, thereby meeting the requirements of foundation pit settlement.

[0026] The combined structure of a temporary middle partition wall and a temporary cofferdam for a riverbed connection project provided by the present invention and the construction method thereof, in a settlement deformation waterproof structure, through the design of a deformation groove and an inner waterproofing membrane that is not bonded to the bottom surface thereof, when the temporary middle partition wall undergoes horizontal deformation during the settlement process or is subjected to the water pressure on the side of the earthbag cofferdam, the inner waterproofing membrane that is not bonded to the deformation groove can expand and contract with the horizontal deformation, so that when horizontal deformation occurs, the waterproofing effect is maintained by the expansion and contraction of the inner waterproofing membrane at the node of the deformation groove.

[0027] The present invention provides a combined structure of a temporary middle partition wall and a temporary cofferdam for a riverbed connection project and a construction method thereof. In a settlement deformation waterproof structure, a non-adhesive folded edge is reserved at the gap between the lower surface of the settlement angle plate and the leveling layer by the external waterproof membrane, so that when settlement occurs and causes a small change in the spacing between the settlement angle plate and the leveling layer, the external waterproof membrane can follow the expansion and contraction at the folded edge, thereby ensuring the waterproof effect through the external waterproof membrane with the folded edge when settlement or vertical deformation occurs. In addition, when horizontal deformation occurs, the filled rubber water stop rod can translate within the folded edge between the transverse plate of the settlement angle plate and the leveling layer without damaging the external waterproof membrane, thereby ensuring the waterproof effect through the rubber water stop rod when horizontal changes occur. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the elevation structure of a temporary middle partition wall and a temporary cofferdam of a riverbed connection project in the prior art that are independently spaced apart from each other;

[0029] Figure 2 It is a schematic diagram of the elevation structure of the prior art in which a plain concrete lattice ridge is constructed and sealed after the temporary cofferdam is removed;

[0030] Figure 3 It is a schematic elevation structure diagram of a combined structure of a temporary intermediate partition wall and a temporary cofferdam for a riverbed connection project of the present invention;

[0031] Figure 4 It is a node diagram of the settlement deformation waterproof structure constructed at the corner of the top plate and the temporary middle partition wall;

[0032] Figure 5 It is the front view of the settlement angle plate;

[0033] Existing technology diagram: 1. Temporary middle partition wall, 2. Reinforced concrete wall, 3. Reinforced concrete buttress, 4. Plain concrete ridge;

[0034] The present invention illustrates: 100, a combined structure of a temporary intermediate partition wall and a temporary cofferdam for a riverbed connection project;

[0035] 110. Temporary partition wall;

[0036] 120. Earthbag cofferdam;

[0037] 130. Subsidence deformation waterproof structure, 131. Deformation groove, 132. Internal waterproofing membrane, 133. Expansion bolt, 134. Subsidence angle plate, 1341. Waist-shaped hole, 135. Pad, 136. External waterproofing membrane, 137. Rubber water stop rod, 138. Isolation layer, 139. Reinforcement angle plate;

[0038] 141. Top plate, 142. Slope layer, 143. Leveling layer. DETAILED DESCRIPTION

[0039] The present invention is described in detail below in conjunction with the accompanying drawings: The advantages and features of the present invention will become more apparent from the following description. It should be noted that the accompanying drawings are in very simplified form and in non-precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0040] Please refer to Figure 3 to Figure 4 The embodiment of the present invention provides a combined structure 100 of a temporary middle partition wall and a temporary cofferdam for a riverbed connection project, including an earthbag cofferdam 120 stacked between a top plate 141 of an underground structure in a leading area and a temporary middle partition wall 110, and a settlement deformation waterproof structure 130 provided at a corner of the top plate 141 and the temporary middle partition wall 110 and shielded by the earthbag cofferdam 120.

[0041] Please refer to Figures 4 to 5 The settlement deformation waterproof structure 130 includes a slope layer 142 and a leveling layer 143 sequentially constructed on the top plate 141 of the underground structure in the advance area, a deformation groove 131 left between the temporary middle partition wall 110, and an inner waterproofing membrane 132 continuously laid on the leveling layer 143 and the temporary middle partition wall 110 through the deformation groove 131, wherein the inner waterproofing membrane 132 is laid at the deformation groove 131 or at least on the bottom surface of the deformation groove 131 without bonding; a settlement angle plate 134 is set on the temporary middle partition wall 110 above the deformation groove 131 through an expansion bolt 133, and a vertical plate of the settlement angle plate 134 connected to the expansion bolt 133 Vertically distributed strip holes or waist-shaped holes 1341 are provided; a pad 135 is provided on the head of the expansion bolt 133 covering the vertical plate exposed from the settlement angle plate 134; an outer waterproof membrane 136 is laid on the inner waterproof membrane 132 and the leveling layer 143 of the temporary middle partition wall 110 constructed on the outer surface of the settlement angle plate 134 and the pad 135; the outer waterproof membrane 136 is reserved with a non-adhesive folded edge in the gap between the lower surface of the settlement angle plate 134 and the leveling layer 143, and a rubber water stop rod 137 is filled in the folded edge between the horizontal plate of the settlement angle plate 134 and the leveling layer 143.

[0042] Please refer to Figures 3 to 5 The embodiment of the present invention also provides a construction method of a temporary intermediate partition wall 110 and a temporary cofferdam combined structure 100 for a riverbed connection project, comprising:

[0043] Step 201, constructing a slope layer 142 and a leveling layer 143 on the top plate 141 of the underground structure in the advance area, and leaving a deformation groove 131 at a predetermined distance between the slope layer 142 and the leveling layer 143 and the temporary middle partition wall 110. The slope layer 142 is a concrete layer, and its slope includes but is not limited to 1%.

[0044] Step 202, the continuously laid inner waterproofing membrane 132 is constructed on the leveling layer 143 of the top plate 141, the deformation groove 131 and the temporary middle partition wall 110, wherein the inner waterproofing membrane 132 on the leveling layer 143 of the top plate 141 and the temporary middle partition wall 110 is laid by bonding, wherein the inner waterproofing membrane 132 is not laid by bonding at the deformation groove 131 or at least at the bottom surface of the deformation groove 131. That is, the inner waterproofing membrane 132 is laid in a virtual manner at the deformation groove 131. The purpose of laying the inner waterproofing coiled material 132 at the deformation groove 131 or at least at the bottom surface of the deformation groove 131 without bonding is to reserve a stretching amount for the inner waterproofing coiled material 132 at the deformation groove 132, so that when the temporary middle partition wall 110 undergoes horizontal deformation, the waterproofing coiled material 132 in the deformation groove 131 will stretch and shrink as the horizontal deformation amount changes, so as to meet the requirements of the temporary middle partition wall 110 for the deformation of the waterproof material in horizontal displacement, and ensure the waterproofing effect here when horizontal deformation occurs. In order to improve the waterproofing effect of the inner waterproofing coiled material 132 and improve the strength of the expansion and contraction change of the waterproofing coiled material at the deformation groove 131, the inner waterproofing coiled material 132 can be two layers, or it can be laid in a way of one layer of waterproof coating and one layer of waterproofing coiled material.

[0045] Step 203, a settlement angle plate 134 is provided on the temporary middle partition wall 110 above the deformation groove 131 through expansion bolts 133, wherein the vertical plate of the settlement angle plate 134 is attached to the inner waterproofing membrane 132 of the temporary middle partition wall 110, and the transverse plate of the settlement angle plate 134 is parallel and suspended above the leveling layer 143 of the top plate 141, and the vertical plate of the settlement angle plate 134 is provided with strip holes or waist holes 1341 distributed vertically and connected to the expansion bolts 133. In order to improve the connection strength, the settlement angle plate 131 can be an angle iron of L100×10. The length of the transverse plate of the settlement angle plate 134 is greater than the width of the deformation groove 131, so as to protect the inner waterproofing membrane 132 at the deformation groove 131 through the settlement analysis 134, and prevent garbage and the like from invading the deformation groove 131 during the construction process, resulting in damage to the inner waterproofing membrane 132 after the garbage is filled.

[0046] Step 204: a pad 135 is provided on the vertical plate of the sinking angle plate 134 to cover the exposed head of the expansion bolt 133. The pad 135 may be a wooden board or an extruded board.

[0047] Step 205, an outer waterproofing membrane 136 is bonded and laid along the inner waterproofing membrane 132 of the temporary middle partition wall 110, the outer surface of the sinking angle plate 134 and the pad 135 thereon, and the inner waterproofing membrane 132 on the leveling layer 143 on the top plate 141, wherein the outer waterproofing membrane 136 has a folded edge that is not bonded and laid between the lower surface of the sinking angle plate 134 and the leveling layer 143, and the folded edge is reserved to the projection of the deformation groove 131. The folded edge of the outer waterproofing membrane 136 can extend to 2 / 3 of the length of the transverse plate of the sinking angle plate 134.

[0048] Step 206, a rubber water stop rod 137 is filled in the folded edge between the transverse plate of the sinking angle plate 134 and the leveling layer 143 on the top plate 141. The rubber water stop rod 137 is a flexible material and is in flexible contact with the outer waterproofing coiled material 136, which can ensure that the outer waterproofing coiled material 136 is not damaged.

[0049] Step 207, earthbags filled with impermeable soil are used to build an outer waterproofing membrane 136 stacked between the temporary middle partition wall 110 and the leveling layer 143 of the top plate 141 and to cover the settlement angle plate 134 and the pad 135 to form an earthbag cofferdam 120 as a half-width water-passing. The impermeable soil can be clay soil.

[0050] Please refer to Figure 3 to Figure 3 The combined structure 100 of the temporary middle partition wall and temporary cofferdam for riverbed connection engineering provided by the embodiment of the present invention and the construction method thereof eliminate the temporary cofferdam with reinforced concrete structure of the river engineering designer and the temporary middle partition wall 110 of the construction engineering constructor, and use earthbag cofferdam 120 to build and stack on the temporary middle partition wall 110 to form a combined structure of the temporary middle partition wall 110 and the temporary cofferdam, thereby avoiding the problems of high construction cost and serious material waste caused by the new construction and demolition of the temporary cofferdam of reinforced concrete structure; in addition, the earthbag cofferdam 120 is attached to the temporary middle partition wall 110 as a temporary cofferdam without leaving a spacing, so as not to affect the width of the water area in the half-width river channel. In addition, the earthbag can be recycled and reused, which is green and environmentally friendly and avoids the problem of material waste.

[0051] Please refer to Figure 4The combined structure 100 of a temporary middle partition wall and a temporary cofferdam for a riverbed connection project provided by an embodiment of the present invention and a construction method thereof, comprises two layers of waterproof membranes formed by an inner waterproof membrane 132 laid on the leveling layer 143 of the top plate 141 of the underground structure in the advance area and the temporary middle partition wall 110, and an outer waterproof membrane 136 constructed on the outer surface of the settlement angle plate 134 and the pad 135 and extending to the inner waterproof membrane 132 of the temporary middle partition wall 110 and the inner waterproof membrane 132 of the leveling layer 143, so as to prevent water in the river channel from penetrating through the earthbag cofferdam 120 to the other side of the temporary middle partition wall 110, thereby improving the water retaining effect of the earthbag cofferdam 120 through the inner and outer waterproof membranes 136. By providing a pad 135 on the head of the expansion bolt 133 of the vertical plate covering the exposure of the sinking angle plate 134, the external waterproof membrane 136 is prevented from being punctured by the head of the expansion bolt 133 exposed on the surface when it is laid on the sinking angle plate 134, thereby ensuring the waterproof effect at the sinking angle plate 134.

[0052] Please refer to Figure 4 The embodiment of the present invention provides a combined structure 100 of a temporary middle partition wall and a temporary cofferdam for a riverbed connection project and a construction method thereof. In a settlement deformation waterproof structure 130, a settlement angle plate 134 is arranged on the temporary middle partition wall 110 above the deformation groove 131 through expansion bolts 133. When foundation pit settlement occurs during the construction of the underground passage project, the temporary middle partition wall 110 synchronously descends, and the expansion bolts 133 slide downward relative to the strip holes or waist holes 1341 of the settlement angle plate 134 to maintain or reduce the settlement distance of the settlement angle plate 134, so as to provide a vertical displacement for the temporary middle partition wall 110 when the foundation pit settles through the settlement angle plate 134, thereby meeting the requirements of foundation pit settlement.

[0053] Please refer to Figure 4 In the combined structure 100 of a temporary middle partition wall and a temporary cofferdam for a riverbed connection project and a construction method thereof provided by an embodiment of the present invention, in a settlement deformation waterproof structure 130, through the design of a deformation groove 131 and an inner waterproofing membrane 132 which is not bonded to the bottom surface thereof, when the temporary middle partition wall 110 is horizontally deformed during the settlement process or due to the water pressure on the side of the earthbag cofferdam 120, the inner waterproofing membrane 132 which is not bonded to the deformation groove 131 can expand and contract from the horizontal deformation, so that when horizontal deformation occurs, the waterproofing effect is maintained by the expansion and contraction of the inner waterproofing membrane 132 at the node of the deformation groove 131.

[0054] Please refer to Figure 4In the combined structure 100 of a temporary middle partition wall and a temporary cofferdam for a riverbed connection project provided by an embodiment of the present invention and a construction method thereof, in a settlement deformation waterproof structure 130, a non-adhesive paved folding edge is reserved at the gap between the lower surface of the settlement angle plate 134 and the leveling layer 143 by an external waterproof membrane 136, so that when settlement occurs and the spacing between the settlement angle plate 134 and the leveling layer 143 changes slightly, the external waterproof membrane 136 can follow the expansion and contraction at the folding edge, thereby ensuring the waterproof effect through the external waterproof membrane 136 with the folding edge when settlement or vertical deformation occurs, and in addition, when horizontal deformation occurs, the filled rubber water stop rod 137 can translate within the folding edge between the transverse plate of the settlement angle plate 134 and the leveling layer 143 without damaging the external waterproof membrane 136, thereby ensuring the waterproof effect through the rubber water stop rod 137 when horizontal changes occur.

[0055] Please refer to Figure 4 In order to prevent the inner waterproofing coiled material 132 in the deformation groove 131 from being easily broken during multiple expansion and contraction changes, the combined structure 100 of the temporary intermediate partition wall and temporary cofferdam of the riverbed connection project and the construction method thereof provided by the embodiment of the present invention has a U-shaped deformation groove 131. At this time, the bottom of the deformation groove 131 is an arc surface, and the inner waterproofing coiled material 132 is bent along the arc surface of the deformation groove 131, avoiding the problem of being easily broken due to right-angle bending.

[0056] Please refer to Figure 4 In order to further improve the waterproof effect and protect the outer waterproofing membrane 136, the temporary intermediate partition wall and temporary cofferdam combined structure 100 and the construction method thereof provided in the embodiment of the present invention construct an isolation layer 138 on the outer waterproofing membrane 136. The isolation layer 138 may be a polyethylene film.

[0057] Please refer to Figure 4 In order to improve the stability of the deformation groove 131 at the end away from the temporary middle partition wall 110, the combined structure 100 of the temporary middle partition wall and temporary cofferdam of the river bottom connection project and the construction method thereof provided by the embodiment of the present invention is provided with a reinforcing angle plate 139 on the corners of the leveling layer 143, the slope layer 142 of the top plate 141 and the deformation groove 131, and the horizontal edge of the reinforcing angle plate 139 is arranged on the leveling layer 143, and the vertical edge of the reinforcing angle plate 139 is arranged on the end surface of the leveling layer 143 and the slope layer 142 at the end where the deformation groove 131 is located. The risk of collapse at the deformation groove 131 can be avoided by the reinforcing angle plate 139. In addition, the combined action of the reinforcing angle plate 139 and the settlement angle plate 134 can prevent the deformation groove 131 from being blocked when there is insufficient rigidity between the two when deformation and settlement occur. The reinforcing angle plate 139 can be an angle iron of L50×5, and the width of the deformation groove 131 is 50mm.

[0058] In order to improve the waterproof effect formed by laying the internal and external waterproofing membranes on the temporary middle partition wall, the combined structure 100 of the temporary middle partition wall and the temporary cofferdam of the riverbed connection project and the construction method thereof provided by the embodiment of the present invention, before laying the internal waterproofing membrane 132 on the temporary middle partition wall 110, a cement mortar leveling layer is constructed on the temporary middle partition wall 110. After the temporary middle partition wall 110 is leveled by the cement mortar leveling layer, the gap between the internal and external waterproofing membranes can be reduced, thereby improving the waterproof effect.

[0059] Please refer to Figure 3 In the combined structure 100 of a temporary intermediate partition wall and a temporary cofferdam for a riverbed connection project provided by an embodiment of the present invention and a construction method thereof, the water-facing surface of the earthbag cofferdam 120 has a diversion slope. The slope ratio of the earthbag cofferdam 120 can be 1:0.2 to 1:0.5 to reduce the lateral pressure of the diversion river on the temporary intermediate partition wall 110, and at the same time can protect the waterproof membrane.

[0060] Please refer to Figure 3 The embodiment of the present invention provides a combined structure 100 of a temporary middle partition wall and a temporary cofferdam for a riverbed connection project and a construction method thereof. A temporary middle partition wall 110 and an earthbag cofferdam 120 are combined to form a diversion cofferdam for a riverbed connection project. Considering that a certain amount of deformation is inevitable during the construction of the foundation pit retaining structure, the deformation of the foundation pit retaining structure can be effectively absorbed by reserving a telescopic displacement for the internal waterproofing membrane 132 in the deformation groove 131 at the interface node between the underground structure top plate 141 of the pilot area and the temporary middle partition wall 110. At the same time, in this node, considering the long construction period, the settlement deformation waterproof structure of the interface construction is used as a protective measure, which can effectively overcome the influence of deformation on the waterproofing of the current cofferdam. At the same time, the cancellation of the temporary reinforced concrete cofferdam in the original design has a significant effect on the construction progress and cost savings. The diversion cofferdam can shorten the cycle and greatly reduce the cost of construction and demolition of concrete walls and reinforced concrete buttresses. At the same time, after the joint structure 100 is dismantled, the post-casting strip working condition can be used for later waterproofing construction, which has the advantages of convenient construction and better waterproofing effect compared with the plain concrete grid sealing method.

[0061] Please refer to Figure 3 In order to improve the reliability of the connection between the inner and outer waterproof membranes, the embodiment of the present invention provides a combined structure 100 of a temporary middle partition wall and a temporary cofferdam for a riverbed connection project and a construction method thereof. The inner and outer waterproof membranes are both turned up to the junction between the top of the temporary middle partition wall 110 and the top beam, and fixed with a -20×2 steel plate strip (cement nails or nails @500), and the ends are sealed with a sealant.

[0062] The present invention is not limited to the above-mentioned specific implementation modes. Obviously, the above-mentioned embodiments are only some embodiments of the embodiments of the present invention, but not all embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention. Those skilled in the art can make other levels of modifications and changes to the present invention. In this way, if these modifications and changes of the present invention fall within the scope of the claims of the present invention, the present invention is also intended to include these changes and changes.

Claims

1. A combined structure of a temporary intermediate partition wall and a temporary cofferdam for a riverbed connection project, characterized in that: It includes an earth bag cofferdam stacked between the top plate and the temporary middle partition wall of the underground structure in the advance area, and a settlement deformation waterproof structure provided at the corner of the top plate and the temporary middle partition wall and shielded by the earth bag cofferdam; The settlement deformation waterproof structure includes a deformation groove left between the slope layer and the leveling layer sequentially constructed on the top plate of the underground structure in the advance area and the temporary middle partition wall, and an inner waterproofing membrane continuously laid on the leveling layer and the temporary middle partition wall through the deformation groove, wherein the inner waterproofing membrane is laid without bonding at the deformation groove or at least at the bottom surface of the deformation groove; A settlement angle plate is arranged on the temporary middle partition wall above the deformation groove by means of expansion bolts, and vertically distributed strip holes or waist-shaped holes are arranged on the vertical plate of the settlement angle plate connected to the expansion bolts; a pad is arranged on the head of the expansion bolt covering the vertical plate exposed from the settlement angle plate, and an outer waterproof membrane is laid on the outer surface of the settlement angle plate and the pad and extending to the inner waterproof membrane of the temporary middle partition wall and the inner waterproof membrane of the leveling layer; the outer waterproof membrane is reserved with a non-adhesive folded edge in the gap between the lower surface of the settlement angle plate and the leveling layer, and a rubber water stop rod is filled in the folded edge between the transverse plate of the settlement angle plate and the leveling layer.

2. The combined structure of temporary intermediate partition wall and temporary cofferdam for riverbed connection engineering according to claim 1 is characterized in that: The deformation groove is U-shaped.

3. The combined structure of temporary intermediate partition wall and temporary cofferdam for riverbed connection engineering according to claim 1 is characterized in that: The backing plate is a wooden board.

4. The combined structure of temporary intermediate partition wall and temporary cofferdam for riverbed connection engineering according to claim 1 is characterized in that: The backing plate is an extruded plate.

5. The combined structure of temporary intermediate partition wall and temporary cofferdam for riverbed connection engineering according to claim 1 is characterized in that: Construct an isolation layer on the external waterproof membrane.

6. The combined structure of temporary intermediate partition wall and temporary cofferdam for riverbed connection engineering according to claim 1 is characterized in that: Reinforced angle plates are arranged on the corners of the leveling layer, slope layer and deformation groove of the top plate, the transverse edges of the reinforced angle plates are arranged on the leveling layer, and the vertical edges of the reinforced angle plates are arranged on the end faces of the leveling layer and slope layer at the ends where the deformation groove is located.

7. The combined structure of temporary intermediate partition wall and temporary cofferdam for riverbed connection engineering according to claim 1 is characterized in that: Before laying the internal waterproof membrane on the temporary middle partition wall, a cement mortar leveling layer is constructed on the temporary middle partition wall.

8. The combined structure of temporary intermediate partition wall and temporary cofferdam for riverbed connection engineering according to claim 1 is characterized in that: The inner waterproof coiled material has two layers.

9. The combined structure of temporary intermediate partition wall and temporary cofferdam for riverbed connection engineering according to claim 1, characterized in that: The water-facing surface of the earthbag cofferdam is provided with a diversion slope.

10. A construction method for a combined structure of a temporary intermediate partition wall and a temporary cofferdam for a riverbed connection project according to any one of claims 1 to 9, characterized in that: include: A slope layer and a leveling layer are constructed on the top plate of the underground structure in the advance area, and deformation grooves are left at a predetermined distance between the slope layer and the leveling layer and the temporary middle partition wall; The internal waterproofing membrane is continuously laid on the leveling layer of the top plate, the deformation groove and the temporary middle partition wall, wherein the internal waterproofing membrane on the leveling layer of the top plate and the temporary middle partition wall is laid by bonding, and the internal waterproofing membrane is not laid by bonding at the deformation groove or at least on the bottom surface of the deformation groove; A settlement angle plate is arranged on the temporary middle partition wall above the deformation groove by means of expansion bolts, wherein the vertical plate of the settlement angle plate is attached to the inner waterproofing membrane of the temporary middle partition wall, the horizontal plate of the settlement angle plate is parallel and suspended above the leveling layer of the top plate, and the vertical plate of the settlement angle plate is provided with strip holes or waist-shaped holes distributed vertically and connected with the expansion bolts; A pad is provided on the vertical plate of the settlement angle plate to cover the exposed head of the expansion bolt; An outer waterproofing membrane is bonded and laid along the inner waterproofing membrane of the temporary middle partition wall, the outer surface of the settlement angle plate and the pad thereon, and the inner waterproofing membrane on the leveling layer on the top plate, wherein the outer waterproofing membrane is provided with a folding edge which is not bonded and laid between the lower surface of the settlement angle plate and the leveling layer, and the folding edge is reserved on the projection of the deformation groove; A rubber water stop rod is filled in the folded edge between the transverse plate of the settlement angle plate and the leveling layer on the top plate; Earthbags filled with impermeable soil are piled up between the temporary middle partition wall and the leveling layer of the top plate and the external waterproof membrane covering the settlement angle plates and pads to form an earthbag cofferdam as a half-width water-passing cofferdam.

Images