Temporary partition wall and temporary cofferdam combined structure of river bottom communication project and construction method thereof

Abstract

The application discloses a kind of river bottom communication engineering temporary partition wall and temporary cofferdam joint structure and its construction method, the joint structure includes the earth bag cofferdam of pile stacking between top plate and temporary partition wall, and the settlement deformation waterproof structure of being blocked by the earth bag cofferdam at the corner of top plate and temporary partition wall, the settlement deformation waterproof structure includes deformation groove, inner waterproof roll, settlement angle plate, expansion bolt, backing plate, outer waterproof roll, wherein inner waterproof roll is not bonded at the deformation groove or at least at the deformation groove bottom surface laying;Vertical plate of the settlement angle plate is provided with vertically distributed strip hole or waist hole;The outer waterproof roll is reserved with not bonded folding edge at the gap between the lower surface of settlement angle plate and screed, and rubber waterstop rod filled in the folding edge between the horizontal plate of settlement angle plate and screed.The application has the advantages of green environmental protection, low cost, good waterproof effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of river bottom connection engineering, in particular to a temporary partition wall and temporary cofferdam combined structure of river bottom connection engineering and a construction method thereof. BACKGROUND

[0002] When a large building group crosses a river, the river bottom is connected to the two sides of the land to realize the overall connection of the underground passage. The river bottom engineering is usually constructed in the mode of "half-passage construction, half-passage water, staged diversion, and non-flood season flow interruption". Figure 1 is a vertical structure diagram of the prior art in which the temporary partition wall and the temporary cofferdam of the river bottom connection engineering are independently and separately arranged, please refer to Figure 1 To meet the purpose of half-passage water construction, a reinforced concrete wall 2 and a reinforced concrete buttress 3 are arranged in the middle of the river as a temporary cofferdam by the river engineering design party. To meet the purpose of half-passage construction of the underground passage of the river bottom engineering, a temporary partition wall 1 is arranged in the middle of the river by the building engineering construction design party. The temporary cofferdam and the temporary partition wall 1 are independent of each other and have a certain interval. The disadvantage is that the construction and removal of the temporary cofferdam wall is a key route engineering of the river bottom underground passage project, directly affecting the construction progress, not only the construction cost is high, but also the material is seriously wasted. The interval between the temporary cofferdam and the temporary partition wall 1 affects the width of the water area in the river for half-passage water. Figure 2 is a vertical structure diagram of the construction of the plain concrete grid dike sealing and pressing after the removal of the temporary cofferdam of the prior art; please refer to Figure 2 After the removal of the temporary cofferdam, the plain concrete grid dike sealing and pressing needs to be constructed at the removal node position, and the waterproof effect at the removal node position is difficult to guarantee. SUMMARY

[0003] The purpose of the present application is to provide a temporary partition wall and temporary cofferdam combined structure of river bottom connection engineering and a construction method thereof, so as to solve the problems of the construction progress of the construction and removal of the temporary cofferdam wall for the river bottom underground passage, high construction cost, serious material waste, the interval between the temporary cofferdam and the temporary partition wall affecting the width of the water area in the river for half-passage water, and poor waterproof effect at the node after the removal of the temporary cofferdam wall.

[0004] In order to solve the above technical problems, the technical scheme provided by the present application is: a temporary partition wall and temporary cofferdam combined structure of river bottom connection engineering, comprising a soil bag cofferdam stacked between a top plate of a prior area underground structure and a temporary partition wall, and a settlement deformation waterproof structure arranged at a corner of the top plate and the temporary partition wall and blocked by the soil bag cofferdam.

[0005] The settlement deformation waterproof structure comprises a deformation groove left between a slope-finding layer and a leveling layer successively constructed on a top plate of an underground structure of a preceding area and a temporary partition wall, an inner waterproof coiled material continuously laid on the leveling layer and the temporary partition wall through the deformation groove, wherein the inner waterproof coiled material at the deformation groove is not adhesively laid or the inner waterproof coiled material of at least a bottom surface of the deformation groove is not adhesively laid; a settlement angle plate arranged on the temporary partition wall above the deformation groove through an expansion bolt, a vertically distributed strip hole or a waist-shaped hole arranged on a vertical plate of the settlement angle plate connected with the expansion bolt; a head of the expansion bolt exposed to the vertical plate of the settlement angle plate is provided with a backing plate, an inner waterproof coiled material of the temporary partition wall and the leveling layer constructed on an outer surface of the settlement angle plate and extending to the temporary partition wall is provided with an outer waterproof coiled material, a folding edge not adhesively laid is reserved at a gap between a lower surface of the settlement angle plate and the leveling layer, and a rubber waterstop rod filled in the folding edge between the horizontal plate of the settlement angle plate and the leveling layer.

[0006] Further, the application provides a temporary partition wall and temporary cofferdam combined structure of river bottom communication engineering, and the deformation groove is U-shaped.

[0007] Further, the application provides a temporary partition wall and temporary cofferdam combined structure of river bottom communication engineering, and the backing plate is a wood board.

[0008] Further, the application provides a temporary partition wall and temporary cofferdam combined structure of river bottom communication engineering, and the backing plate is an extruded board.

[0009] Further, the application provides a temporary partition wall and temporary cofferdam combined structure of river bottom communication engineering, and an isolation layer is constructed on the outer waterproof coiled material.

[0010] Further, the application provides a temporary partition wall and temporary cofferdam combined structure of river bottom communication engineering, and a reinforcing angle plate is arranged at a corner of the leveling layer, the slope-finding layer and the deformation groove of the top plate, a horizontal edge of the reinforcing angle plate is arranged on the leveling layer, and a vertical edge of the reinforcing angle plate is arranged on an end surface of the leveling layer, the slope-finding layer at an end where the deformation groove is located.

[0011] Further, the application provides a temporary partition wall and temporary cofferdam combined structure of river bottom communication engineering, and a cement mortar leveling layer is constructed on the temporary partition wall before the inner waterproof coiled material is laid on the temporary partition wall.

[0012] Further, the application provides a temporary partition wall and temporary cofferdam combined structure of river bottom communication engineering, and the inner waterproof coiled material is two layers.

[0013] Further, the application provides a temporary partition wall and temporary cofferdam combined structure of river bottom communication engineering, and a water-approaching surface of the earth bag cofferdam has a flow guide slope surface.

[0014] To solve the above technical problems, the application provides another technical scheme, which is a construction method of a temporary partition wall and a temporary cofferdam combined structure of a river bottom communication project, comprising:

[0015] A sloping layer and a leveling layer are constructed on the top plate of the prior area underground structure, and a deformation groove is left at a predetermined distance of the sloping layer and the leveling layer from the temporary partition wall;

[0016] The continuous inner waterproof roll is constructed on the leveling layer of the top plate, the deformation groove and the temporary partition wall, wherein the inner waterproof roll is adhesively laid on the leveling layer of the top plate and the temporary partition wall, and the inner waterproof roll is not adhesively laid at the deformation groove or at least on the bottom surface of the deformation groove;

[0017] The settlement angle plate is provided on the temporary partition wall above the deformation groove through the expansion bolt, wherein the vertical plate of the settlement angle plate is attached to the inner waterproof roll of the temporary partition wall, the horizontal plate of the settlement angle plate is parallel to and suspended above the leveling layer of the top plate, and the vertical distribution strip-shaped hole or waist-shaped hole connected with the expansion bolt is arranged on the vertical plate of the settlement angle plate;

[0018] The gasket is arranged on the exposed head of the expansion bolt on the vertical plate of the settlement angle plate;

[0019] The outer waterproof roll is adhesively laid on the outer surface of the inner waterproof roll of the temporary partition wall, the settlement angle plate and the gasket thereon, and the inner waterproof roll on the leveling layer of the top plate, wherein the outer waterproof roll is provided with a non-adhesively laid folded edge between the lower surface of the settlement angle plate and the leveling layer, and the folded edge is projected to the deformation groove;

[0020] The rubber waterstop rod is filled in the folded edge between the horizontal plate of the settlement angle plate and the leveling layer of the top plate;

[0021] The soil bag filled with non-water permeable soil is stacked between the temporary partition wall and the leveling layer of the top plate and covers the outer waterproof roll of the settlement angle plate and the gasket to form a soil bag cofferdam as a half-width water passage.

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

[0023] The application provides a temporary cofferdam and temporary middle partition wall joint structure of river bottom communication engineering and a construction method thereof, cancels the temporary cofferdam of the temporary middle partition wall existing interval distance from the reinforced concrete structure of the river channel engineering design party and the construction party of the building engineering, adopts the earth bag cofferdam to stack on the temporary middle partition wall to form the joint structure of the two walls of the temporary middle partition wall and the temporary cofferdam, wherein the earth bag cofferdam can be recycled, has the advantages of green environmental protection and low cost, thereby avoiding the problems of high construction cost and serious material waste caused by the new construction and demolition construction of the reinforced concrete structure of the temporary cofferdam; in addition, the earth bag cofferdam is attached to the temporary middle partition wall without leaving an interval, thereby not affecting the width of the water area in the river channel of half-width water passing.

[0024] The application provides a temporary cofferdam and temporary middle partition wall joint structure of river bottom communication engineering and a construction method thereof, two waterproof coiled materials are formed by laying the inner waterproof coiled material on the leveling layer of the top plate of the underground structure of the preceding area and the temporary middle partition wall and laying the outer waterproof coiled material on the outer surface of the settlement angle plate and the cushion plate and extending to the inner waterproof coiled material of the leveling layer, so that the water in the river channel is prevented from penetrating to the other side of the temporary middle partition wall through the earth bag cofferdam, and the water retaining effect of the earth bag cofferdam is improved through the inner and outer waterproof coiled materials. The cushion plate arranged on the head of the expansion bolt exposed to the vertical plate of the settlement angle plate prevents the outer waterproof coiled material from being pierced by the expansion bolt head exposed to the surface of the settlement angle plate when the outer waterproof coiled material is laid on the settlement angle plate, so that the waterproof effect at the settlement angle plate is ensured.

[0025] The application provides a temporary cofferdam and temporary middle partition wall joint structure of river bottom communication engineering and a construction method thereof, in the settlement deformation waterproof structure, the settlement angle plate arranged on the temporary middle partition wall above the deformation groove is provided with the expansion bolt, when the foundation pit settlement occurs during the construction process of the underground passage engineering, the temporary middle partition wall synchronously descends, and the expansion bolt slides downward relative to the strip-shaped hole or the waist-shaped hole of the settlement angle plate, so that the settlement distance of the settlement angle plate is kept or reduced, the vertical displacement amount of the temporary middle partition wall is provided through the settlement angle plate when the foundation pit settlement occurs, and the requirement of the foundation pit settlement is met.

[0026] The application provides a temporary cofferdam and temporary middle partition wall joint structure of river bottom communication engineering and a construction method thereof, in the settlement deformation waterproof structure, the deformation groove is designed, and the inner waterproof coiled material is not adhesively laid on at least the bottom surface of the deformation groove, so that the inner waterproof coiled material not adhesively laid in the deformation groove can stretch and contract when the temporary middle partition wall horizontally deforms during the settlement process or is subjected to the water pressure on the side of the earth bag cofferdam, so that the waterproof effect is kept through the stretching and contraction amount of the inner waterproof coiled material at the node of the deformation groove when the horizontal deformation occurs.

[0027] The present invention provides a combined structure and construction method for a temporary central partition wall and a temporary cofferdam in a riverbed connection project. In the settlement deformation waterproofing structure, a non-adhesive folded edge is reserved at the gap between the lower surface of the settlement corner plate and the leveling layer of the outer waterproof membrane. When settlement occurs and the distance between the settlement corner plate and the leveling layer changes slightly, the outer waterproof membrane can expand and contract at the folded edge. Thus, the waterproofing effect is ensured by the outer waterproof membrane with the folded edge when settlement or vertical deformation occurs. In addition, when horizontal deformation occurs, the filled rubber waterstop can move within the folded edge between the horizontal plate of the settlement corner plate and the leveling layer without damaging the outer waterproof membrane. Thus, the waterproofing effect is ensured by the rubber waterstop when horizontal changes occur. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the elevation structure of a temporary central partition wall and a temporary cofferdam that are independently and alternately set up in a riverbed connection project in the existing technology.

[0029] Figure 2 This is a schematic diagram of the elevation structure of a plain concrete grid embankment to be constructed after the temporary cofferdam is removed using existing technology.

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

[0031] Figure 4 This is a node diagram showing the construction of a settlement and deformation waterproofing structure at the corner of the top slab and the temporary partition wall;

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

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

[0034] Illustrations of this invention:

[0035] 110. Temporary partition wall;

[0036] 120. Earthbag cofferdam;

[0037] 130. Settlement deformation waterproof structure; 131. Deformation groove; 132. Inner waterproof membrane; 133. Expansion bolt; 134. Settlement corner plate; 1341. Waist-shaped hole; 135. Pad plate; 136. Outer waterproof membrane; 137. Rubber waterstop rod; 138. Isolation layer; 139. Reinforcing corner plate.

[0038] 141. Top slab, 142. Slope-finding layer, 143. Leveling layer. Detailed Implementation

[0039] The present application will be described in detail below with reference to the drawings. The advantages and features of the present application will be more apparent from the following description. It should be noted that the drawings are very simplified and are not drawn to scale, and are only used to facilitate, clarify and assist in the description of the embodiments of the present application.

[0040] Referring to Figures 3 to 4 The present application provides a temporary partition wall and temporary cofferdam combined structure for river bottom connection engineering, which comprises a soil bag cofferdam 120 stacked between the top plate 141 of the preceding area underground structure and the temporary partition wall 110, and a settlement deformation waterproof structure 130 arranged at the corner of the top plate 141 and the temporary partition wall 110 and blocked by the soil bag cofferdam 120.

[0041] Referring to Figures 4 to 5 The settlement deformation waterproof structure 130 comprises a deformation groove 131 arranged between the slope layer 142 and the leveling layer 143 of the preceding area underground structure and the temporary partition wall 110, an inner waterproof roll 132 continuously laid on the leveling layer 143 and the temporary partition wall 110 through the deformation groove 131, wherein the inner waterproof roll 132 is not bonded at the deformation groove 131 or at least the bottom surface of the deformation groove 131; a settlement angle plate 134 arranged on the temporary partition wall 110 above the deformation groove 131 through expansion bolts 133, a vertical plate of the settlement angle plate 134 connected with the expansion bolts 133 is provided with vertically distributed strip holes or waist-shaped holes 1341; a head of the expansion bolt 133 exposed on the vertical plate of the settlement angle plate 134 is provided with a pad 135, an inner waterproof roll 132 of the leveling layer 143 and the inner waterproof roll 132 of the temporary partition wall 110 are laid with an outer waterproof roll 136 on the outer surface of the settlement angle plate 134 and the pad 135 and extended to the temporary partition wall 110, the outer waterproof roll 136 is provided with a non-bonded folding edge at the gap between the lower surface of the settlement angle plate 134 and the leveling layer 143, and a rubber waterstop 137 filled in the folding edge between the horizontal plate of the settlement angle plate 134 and the leveling layer 143.

[0042] Referring to Figures 3 to 5 The present application also provides a construction method of a temporary partition wall 110 and temporary cofferdam combined structure for river bottom connection engineering, which comprises:

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

[0044] Step 202, construction of continuous laying of inner waterproofing material 132 on the leveling layer 143 of the roof 141, the deformation groove 131 and the temporary partition wall 110, wherein the inner waterproofing material 132 on the leveling layer 143 of the roof 141 and the temporary partition wall 110 is adhesively laid, and the inner waterproofing material 132 is not adhesively laid at the deformation groove 131 or at least on the bottom surface of the deformation groove 131. That is, the inner waterproofing material 132 is not adhesively laid at the deformation groove 131. The purpose of not adhesively laying the inner waterproofing material 132 at the deformation groove 131 or at least on the bottom surface of the deformation groove 131 is to reserve a stretch amount for the inner waterproofing material 132 at the deformation groove 131, so that when the temporary partition wall 110 is horizontally deformed, the waterproofing material 132 in the deformation groove 131 stretches with the change of the horizontal deformation amount to meet the deformation requirement of the waterproofing material of the temporary partition wall 110 in the horizontal displacement, and ensure the waterproofing effect when the horizontal deformation occurs. In order to improve the waterproofing effect of the inner waterproofing material 132 and the strength of the stretch change of the waterproofing material at the deformation groove 131, the inner waterproofing material 132 can be two layers, or one layer of waterproofing coating and one layer of waterproofing material.

[0045] Step 203, setting a settlement angle plate 134 on the temporary partition wall 110 above the deformation groove 131 by expansion bolts 133, wherein the vertical plate of the settlement angle plate 134 is attached to the inner waterproofing material 132 of the temporary partition wall 110, the horizontal plate of the settlement angle plate 134 is parallel and suspended above the leveling layer 143 of the roof 141, and the vertical plate of the settlement angle plate 134 is provided with vertically distributed strip-shaped holes or waist-shaped holes 1341 connected with the expansion bolts 133. In order to improve the connection strength, the settlement angle plate 131 can be an angle iron of L100x10. The length of the horizontal plate of the settlement angle plate 134 is greater than the width of the deformation groove 131, so as to protect the inner waterproofing material 132 at the deformation groove 131 by the settlement angle plate 134, and avoid the intrusion of garbage and the like into the deformation groove 131 during construction, which causes damage to the inner waterproofing material 132 after the garbage is filled.

[0046] Step 204, covering the gasket 135 set on the head of the exposed expansion bolt 133 on the vertical plate of the settlement angle plate 134. The gasket 135 can be a wooden board or an extruded board.

[0047] Step 205, the outer waterproofing membrane 136 is adhered and laid on the outer surface of the inner waterproofing membrane 132 of the temporary partition wall 110, the settlement angle plate 134 and the cushion plate 135 thereon, and the inner waterproofing membrane 132 on the leveling layer 143 on the top plate 141, wherein the outer waterproofing membrane 136 is reserved with a non-adhered and laid folding edge between the lower surface of the settlement angle plate 134 and the leveling layer 143, and the folding edge is reserved to the projection of the deformation groove 131. The folding edge of the outer waterproofing membrane 136 can extend into 2 / 3 of the length of the transverse plate of the settlement angle plate 134.

[0048] Step 206, the rubber waterstop 137 is filled in the folding edge between the transverse plate of the settlement angle plate 134 and the leveling layer 143 on the top plate 141. The rubber waterstop 137 is in flexible contact with the outer waterproofing membrane 136, which can ensure that the outer waterproofing membrane 136 is not damaged.

[0049] Step 207, the earth bag cofferdam 120 as a half-width water passing structure is formed by stacking the earth bags filled with non-water permeable soil between the temporary partition wall 110 and the leveling layer 143 on the top plate 141 and covering the outer waterproofing membrane 136 of the settlement angle plate 134 and the cushion plate 135. The non-water permeable soil can be clay.

[0050] Please refer to Figures 3 to 3 The river bottom communication engineering temporary partition wall and the temporary cofferdam combined structure and the construction method thereof provided by the embodiment of the present application cancel the temporary cofferdam with a spacing distance from the temporary partition wall 110 of the river engineering design party and the reinforced concrete structure of the building engineering construction party, and the earth bag cofferdam 120 is stacked on the temporary partition wall 110 to form a combined structure of the temporary 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 construction of the reinforced concrete structure of the temporary cofferdam. In addition, the earth bag cofferdam 120 is attached to the temporary partition wall 110 without spacing, thereby not affecting the width of the water area in the half-width water passing river. In addition, the earth bag can be recycled and reused, which is green and environmentally friendly and avoids material waste.

[0051] Please refer to Figure 4The river bottom connecting engineering temporary partition wall and temporary cofferdam combined structure and the construction method thereof provided by the embodiment of the present application can prevent water in the river channel from penetrating to the other side of the temporary partition wall 110 through the earth bag cofferdam 120, thereby improving the water retaining effect of the earth bag cofferdam 120 through the inner and outer waterproof rolls 136.

[0052] Please refer to Figure 4 The river bottom connecting engineering temporary partition wall and temporary cofferdam combined structure and the construction method thereof provided by the embodiment of the present application can prevent water in the river channel from penetrating to the other side of the temporary partition wall 110 through the earth bag cofferdam 120, thereby improving the water retaining effect of the earth bag cofferdam 120 through the inner and outer waterproof rolls 136.

[0053] Please refer to Figure 4 The river bottom connecting engineering temporary partition wall and temporary cofferdam combined structure and the construction method thereof provided by the embodiment of the present application can prevent water in the river channel from penetrating to the other side of the temporary partition wall 110 through the earth bag cofferdam 120, thereby improving the water retaining effect of the earth bag cofferdam 120 through the inner and outer waterproof rolls 136.

[0054] Please refer to Figure 4The temporary middle partition wall and temporary cofferdam combined structure and construction method of river bottom communication engineering provided by the embodiment of the present application, in the settlement deformation waterproof structure 130, the outer waterproof coiled material 136 is reserved with a non-adhesive laid turn-up edge at the gap between the lower surface of the settlement angle plate 134 and the leveling layer 143, so that when the settlement occurs and the distance between the settlement angle plate 134 and the leveling layer 143 changes slightly, the outer waterproof coiled material 136 can stretch and contract at the turn-up edge, thereby ensuring the waterproof effect when the settlement or vertical deformation occurs. In addition, when the horizontal deformation occurs, the filled rubber water stop rod 137 can translate in the turn-up edge between the transverse plate of the settlement angle plate 134 and the leveling layer 143 without damaging the outer waterproof coiled material 136, thereby ensuring the waterproof effect when the horizontal deformation occurs.

[0055] Please refer to Figure 4 In order to avoid the inner waterproof coiled material 132 in the deformation groove 131 being easily broken when stretched and contracted repeatedly, the temporary middle partition wall and temporary cofferdam combined structure and construction method of river bottom communication engineering provided by the embodiment of the present application, the deformation groove 131 is U-shaped. At this time, the bottom of the deformation groove 131 is an arc surface, and the inner waterproof coiled material 132 is bent along the arc surface of the deformation groove 131, thereby avoiding the problem that the right-angle bending is easy to be broken.

[0056] Please refer to Figure 4 In order to further improve the waterproof effect and protect the outer waterproof coiled material 136, the temporary middle partition wall and temporary cofferdam combined structure and construction method of river bottom communication engineering provided by the embodiment of the present application, a separation layer 138 is constructed on the outer waterproof coiled material 136. The separation layer 138 can be a polyethylene film.

[0057] Please refer to Figure 4 In order to improve the stability of the deformation groove 131 at the end far away from the temporary middle partition wall 110, the temporary middle partition wall and temporary cofferdam combined structure and construction method of river bottom communication engineering provided by the embodiment of the present application, a reinforcing angle plate 139 is arranged at the corner of the leveling layer 143, the sloping layer 142 of the top plate 141 and the deformation groove 131. The transverse 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 sloping layer 142 at the end where the deformation groove 131 is located. The reinforcing angle plate 139 can avoid the risk of collapse at the deformation groove 131. In addition, the reinforcing angle plate 139 and the settlement angle plate 134 jointly act to prevent the deformation groove 131 from being blocked when the deformation groove 131 is deformed and settled without sufficient rigidity between the two. The reinforcing angle plate 139 can be an L50*5 angle iron, and the width of the deformation groove 131 is 50mm at this time.

[0058] In order to improve the waterproof effect of laying inner and outer waterproof coiled material on the temporary partition wall, the temporary partition wall and temporary cofferdam combined structure and construction method of river bottom communication engineering provided by the embodiment of the application lays cement mortar leveling layer on the temporary partition wall 110 before laying the inner waterproof coiled material 132 on the temporary partition wall 110. After leveling the temporary partition wall 110 through the cement mortar leveling layer, the gap of laying the inner and outer waterproof coiled material can be reduced, and the waterproof effect can be improved.

[0059] Please refer to Figure 3 The water-facing surface of the earth bag cofferdam 120 has a flow guide slope surface. The slope ratio of the earth bag cofferdam 120 can be 1:0.2-1:0.5, so as to reduce the lateral pressure of the temporary partition wall 110 caused by the flow guiding river, and simultaneously play a role in protecting the waterproof coiled material.

[0060] Please refer to Figure 3 The temporary partition wall 110 and the earth bag cofferdam 120 are combined to form a flow guiding cofferdam for the river bottom communication engineering. Considering the deformation inevitably generated in the construction process of the foundation pit support structure, the inner waterproof coiled material 132 is reserved with a stretching displacement amount in the deformation groove 131 at the interface node between the underground structure top plate 141 and the temporary partition wall 110, so as to effectively digest the deformation generated by the foundation pit support structure. Meanwhile, the construction settlement deformation waterproof structure at the node is considered as a protective measure due to the long construction period, so as to effectively overcome the influence of deformation on the waterproof of the flow guiding cofferdam. At the same time, the original design of the temporary reinforced concrete cofferdam is cancelled, which has a significant effect on the construction progress and cost saving. The flow guiding cofferdam can shorten the period and greatly reduce the cost of construction and removal of the concrete wall and the steel reinforced concrete buttress. After the combined structure is removed, the post-pouring band working condition can be used for later waterproof construction, which has the advantages of convenient construction and better waterproof effect compared with the plain concrete grid sealing pressure mode.

[0061] Please refer to Figure 3 In order to improve the reliable connection of the inner and outer waterproof coiled material, the temporary partition wall and temporary cofferdam combined structure and construction method of river bottom communication engineering provided by the embodiment of the application is fixed by using -20x2 steel plate pressing (cement nails or shot nails @500) at the junction of the top of the temporary partition wall 110 and the pressing top beam, and is sealed and closed by using sealing paste.

[0062] The present application is not limited to the above-described specific embodiments, and it is obvious that the above-described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application. Those of ordinary skill in the art can make other levels of modifications and changes to the present application. Thus, if these modifications and changes of the present application belong to the scope of the claims of the present application, the present application also intends to include these modifications and changes.

Claims

1. A riverbed communication work temporary partition wall and temporary cofferdam combined structure characterized by, The soil bag cofferdam is stacked between the top plate of the preceding area underground structure and the temporary partition wall, and the settlement deformation waterproof structure is arranged at the corner of the top plate and the temporary partition wall and is shielded by the soil bag cofferdam. The settlement deformation waterproof structure comprises a deformation groove left between a sloping layer and a leveling layer successively constructed on the top plate of the preceding area underground structure and the temporary partition wall, and an inner waterproof roll continuously laid on the leveling layer and the temporary partition wall through the deformation groove, wherein the inner waterproof roll is not adhesively laid at the bottom surface of the deformation groove or at least at the bottom surface of the deformation groove. A settlement angle plate is arranged on the temporary partition wall above the deformation groove through expansion bolts, strip-shaped holes or waist-shaped holes vertically distributed on the vertical plate of the settlement angle plate are connected with the expansion bolts, a pad covering the head of the exposed expansion bolt is arranged on the settlement angle plate, an outer waterproof roll is adhesively laid along the outer surface of the inner waterproof roll of the temporary partition wall, the settlement angle plate and the pad, the inner waterproof roll of the leveling layer on the top plate, and a folding edge not adhesively laid is reserved at the gap between the lower surface of the settlement angle plate and the leveling layer, and a rubber waterstop rod is filled in the folding edge between the horizontal plate of the settlement angle plate and the leveling layer.

2. The temporary bulkhead and cofferdam combination of the riverbed communication project according to claim 1, wherein, The deformation groove is U-shaped.

3. The temporary bulkhead and cofferdam combination of claim 1, wherein: The pad is a wood board.

4. The temporary bulkhead and cofferdam combination of claim 1, wherein, The pad is an extruded board.

5. The temporary bulkhead and cofferdam combination of claim 1, wherein, An isolation layer is constructed on the outer waterproof roll.

6. The temporary bulkhead and cofferdam combination of the riverbed communication project according to claim 1, wherein, A reinforcing angle plate is arranged at the corner of the leveling layer, the sloping layer and the deformation groove of the top plate, the horizontal edge of the reinforcing angle plate is arranged on the leveling layer, and the vertical edge of the reinforcing angle plate is arranged on the end surface of the leveling layer and the sloping layer at the end where the deformation groove is located.

7. The temporary bulkhead and cofferdam combination of the riverbed communication project according to claim 1, wherein, A cement mortar leveling layer is constructed on the temporary partition wall before the inner waterproof roll is laid on the temporary partition wall.

8. The temporary bulkhead and cofferdam combination of the riverbed communication project according to claim 1, wherein, The inner waterproof roll is two layers.

9. The temporary bulkhead and cofferdam combination of the riverbed communication project according to claim 1, wherein, The water-facing surface of the soil bag cofferdam has a flow guide slope surface.

10. A construction method of a temporary bulkhead and a temporary cofferdam combined structure of the riverbed communication work according to any one of claims 1 to 9, characterized by, The method comprises the following steps: A sloping layer and a leveling layer are constructed on the top plate of the preceding area underground structure, and a deformation groove is left at a predetermined distance of the temporary partition wall; An inner waterproof roll is continuously laid on the leveling layer of the top plate and the temporary partition wall, wherein the inner waterproof roll is adhesively laid on the leveling layer of the top plate and the temporary partition wall, and the inner waterproof roll is not adhesively laid at the bottom surface of the deformation groove or at least at the bottom surface of the deformation groove; A settlement angle plate is arranged on the temporary partition wall above the deformation groove through expansion bolts, wherein the vertical plate of the settlement angle plate is attached to the inner waterproof roll of the temporary partition wall, the horizontal plate of the settlement angle plate is parallel to and suspended above the leveling layer of the top plate, and strip-shaped holes or waist-shaped holes vertically distributed on the vertical plate of the settlement angle plate are connected with the expansion bolts; A pad covering the head of the exposed expansion bolt is arranged on the vertical plate of the settlement angle plate; An outer waterproof roll is adhesively laid along the outer surface of the inner waterproof roll of the temporary partition wall, the settlement angle plate and the pad thereon, the inner waterproof roll of the leveling layer on the top plate, and a folding edge not adhesively laid is reserved between the lower surface of the settlement angle plate and the leveling layer, and the folding edge is projected to the deformation groove; Rubber waterstop is filled in the folded edge between the transverse plate of the settlement angle plate and the leveling layer on the top plate; The soil bag cofferdam for half span water is formed by stacking the soil bags filled with non-water permeable soil between the temporary partition wall and the leveling layer of the top plate and covering the outer waterproofing membrane of the settlement angle plate and the cushion plate.

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