CN219450747U - Transitional retaining wall of cofferdam supporting system for constructing underwater passage - Google Patents
Transitional retaining wall of cofferdam supporting system for constructing underwater passage Download PDFInfo
- Publication number
- CN219450747U CN219450747U CN202320492294.9U CN202320492294U CN219450747U CN 219450747 U CN219450747 U CN 219450747U CN 202320492294 U CN202320492294 U CN 202320492294U CN 219450747 U CN219450747 U CN 219450747U
- Authority
- CN
- China
- Prior art keywords
- steel sheet
- steel
- retaining wall
- sheet pile
- underwater
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The utility model discloses a transition retaining wall of a cofferdam supporting system for constructing an underwater passage; the concrete pile comprises a main wall body positioned on a top plate of a left half-width underwater channel, wherein two concrete raised strips extending along the length direction of a river channel are arranged on the top plate of the left half-width underwater channel, the two concrete raised strips and the top plate jointly form a mounting groove, and fly ash clay mortar is filled in the mounting groove; the main wall body comprises a row of continuous locking Larson steel sheet piles which are inserted in the mounting groove and are embedded with the fly ash clay mortar; the upper part of the Larson steel sheet pile is fixed with a first steel enclosing purlin parallel to the mounting groove. The retaining wall can enhance the water stopping effect, and is simple and convenient to assemble and disassemble.
Description
Technical Field
The utility model relates to the technical field of river cofferdam type foundation pit supporting construction in civil engineering, in particular to a transition retaining wall of a cofferdam type underwater foundation pit supporting system for constructing an underwater passage.
Background
The PC construction method pile is a mature prior art, and the PC steel pipe piles and the Lasen steel sheet pile piles which are alternately distributed are connected by utilizing the tongue-and-groove to form a continuous combined steel wall body. The application relates to an engineering for building a concrete underwater channel in a river channel, which can be used for communicating underground spaces at two sides of the river channel into a whole, is convenient to use, does not block water flow, keeps the river channel smooth, has small influence on environment, accords with the environment-friendly concept, and is increasingly wide in popularization and application.
In the prior art, a concrete underwater channel is constructed by adopting a half-width mode, and the construction sequence of first left half-width mode and then right half-width mode is taken as an example, and the construction process is as follows. Firstly, constructing a left front retaining wall, an interface retaining wall and a left rear retaining wall of the PC construction method pile, wherein the three PC construction method pile retaining walls are connected end to form a left half cofferdam and underwater foundation pit supporting system of the river course, and meanwhile, the right half running water of the river course is kept smooth; pumping water in the left half cofferdam, digging soil, constructing a left half concrete underwater channel, and building a temporary brick wall at the right end joint of the left half channel; then, constructing a transition retaining wall at the left side of the left half-width channel interface, wherein the purpose is to enable two sides of the transition retaining wall to respectively abut against the left front retaining wall and the left rear retaining wall to stop water; then removing the left side of the transition retaining wall, and continuing to remove the interface retaining wall, so that the left half of the river channel recovers water flow, and the left side of the transition retaining wall is reserved; constructing a right front retaining wall and a right rear retaining wall of the PC construction method pile, and connecting the right front retaining wall, the left front retaining wall retaining part, the transitional retaining wall, the left rear retaining wall retaining part and the right rear retaining wall end to form a continuous water-stopping right half-width cofferdam and underwater foundation pit supporting system; finally, pumping water and excavating the right half cofferdam, constructing a right half concrete underwater channel, enabling the right half concrete underwater channel to be in butt joint communication with the left half underwater channel, and removing the temporary brick wall at the joint; and removing the right half cofferdam structure.
The main body of the application is the transition retaining wall structure of the cofferdam type underwater foundation pit supporting system for constructing the underwater passage. The transition retaining wall in the prior art comprises a main wall body positioned on a top plate of a left half concrete underwater channel, wherein the main wall body comprises a triangular steel truss which is placed on the top plate and a massive sand bag which is stacked in the triangular steel truss, and the triangular steel truss is used for restraining the sand bag for a framework to form an integral water stopping structure so as to resist the lateral pressure of left water; and a clay mortar layer is backfilled in the gap between the side of the main wall body and the left front retaining wall or the left rear retaining wall.
The prior art transitional retaining wall described above has the following drawbacks. Firstly, each sand bag stacked with each other of a main wall body of a retaining wall cannot realize complete water stop, and the clay mortar water stop effect in the gap between the main wall body and a left front retaining wall or a left rear retaining wall is also common, so that water is often leaked and fed into a right half cofferdam in actual construction, thereby causing inconvenient construction and potential safety hazard; the number of sand bags in the main wall body is large, and the dead weight is large, so that the process of stacking or moving away massive sand bags is time-consuming and labor-consuming when the main wall body is built or disassembled, the labor cost is increased, and the construction period is shortened; moreover, as the main wall body of the stacked massive sand bags is heavy in weight, the burden of the underwater channel structure at the lower part of the transition retaining wall is increased, all vertical and longitudinal support steel pipes of the top plate bottom formwork still need to be reserved after the concrete of the left half channel top plate is poured for supporting, the turnover can not be removed, and even more and denser vertical support steel pipe frames need to be equipped, so that the turnover utilization rate of the support steel pipe frames is reduced, and the construction cost is increased.
Disclosure of Invention
The utility model aims to solve the technical problem of providing the transition retaining wall of the cofferdam type underwater foundation pit supporting system for constructing the underwater passage, which has the advantages of good water stopping effect, simplicity and convenience in assembly and disassembly, light dead weight and small load of the underwater passage structure at the lower part of the transition retaining wall.
The technical scheme of the utility model is that a transition retaining wall of a cofferdam type underwater foundation pit supporting system for constructing an underwater passage is provided; the concrete pile comprises a main wall body positioned on a top plate of a left half-width underwater channel, wherein two concrete raised strips extending along the length direction of a river channel are arranged on the top plate of the left half-width underwater channel, the two concrete raised strips and the top plate jointly form a mounting groove, and fly ash clay mortar is filled in the mounting groove; the main wall body comprises a row of continuous locking Larson steel sheet piles which are inserted in the mounting groove and are embedded with the fly ash clay mortar; the upper part of the Larson steel sheet pile is fixed with a first steel enclosing purlin parallel to the mounting groove.
Compared with the prior art, the transition retaining wall of the cofferdam type underwater foundation pit supporting system for constructing the underwater passage has the following advantages.
Firstly, the main wall body of the transition retaining wall, namely each Larson steel sheet pile of the Larson steel sheet pile wall, is tightly meshed through the tongue-and-groove lock catches to form a continuous steel water stopping structure, so that compared with a stacked sand bag, the water stopping effect of the transition retaining wall is obviously improved, the water leakage and inflow probability of a right half cofferdam in actual construction is greatly reduced, the construction process is convenient, and the potential safety hazard is reduced; the Larson steel sheet piles are inserted in the mounting groove and filled with the fly ash clay mortar, so that the bottom embedding effect is firm, and the upper parts of the Larson steel sheet piles are connected into an integral structure by the first section steel purlin to jointly resist the lateral pressure of a water body, so that the Larson steel sheet piles are higher in rigidity and better in supporting and water stopping effects; the process of assembling the main wall body adopts the vibrating hammer to insert and fix each Larson steel sheet pile into the fly ash mortar, and the process of removing the main wall body adopts the vibrating hammer to extract each Larson steel sheet pile from the fly ash mortar, so that the mechanical insertion process is obviously more convenient and more rapid to operate and labor-saving compared with the process of carrying sand bags in large quantities, thereby reducing the labor cost and accelerating the construction period; furthermore, compared with a sand bag, the Lasen steel sheet pile of the main wall body has lighter dead weight and small load on the underwater channel structure at the lower part of the transition retaining wall, so that after concrete is poured and hardened at the top of the underwater channel, all the vertical supporting steel pipe frames of the top plate and bottom templates can be removed, thus the material consumption is reduced, the turnover utilization rate of supporting steel pipes is accelerated, and the construction cost is further reduced.
Preferably, the right surface of each right convex Lassen steel sheet pile of the main wall body is welded with a steel bracket, the first steel purlin is placed on the steel bracket, and a flange plate of the first steel purlin is fixedly tied with each left convex Lassen steel sheet pile through a pair of tie bolts; therefore, when the first steel purlin is assembled, the first steel purlin is only required to be placed on each steel bracket, and is fast tied and fixed by utilizing each split bolt, so that the workload of on-site welding is obviously reduced on the premise of ensuring the connection firmness, and the split bolt nuts are only required to be unscrewed during the disassembly, so that the disassembly and assembly processes are convenient and quick.
As a further preferred mode, the right front retaining wall of the cofferdam type underwater foundation pit supporting system is provided with a second steel enclosing purlin extending along the width direction of the river channel, the right rear retaining wall of the cofferdam type underwater foundation pit supporting system is also provided with a second steel enclosing purlin, and the front end and the rear end of the first steel enclosing purlin are respectively welded and fixed with the front second steel enclosing purlin and the rear second steel enclosing purlin; therefore, the main wall body can be ensured to stably and reliably transfer the load of the water body to the two sides through the first steel enclosing purlin to be balanced by the front and rear two rows of steel retaining walls, and the integrity and firmness among the retaining walls of the right half cofferdam are enhanced.
As another preferable mode, a special-shaped drawknot steel sheet pile is arranged between the forefront Larson steel sheet pile of the main wall body and the nearest PC steel pipe pile in the left front retaining wall, and a special-shaped drawknot steel sheet pile is also arranged between the rearmost Larson steel sheet pile and the nearest PC steel pipe pile in the left rear retaining wall; each special-shaped drawknot steel sheet pile comprises an outer curled edge for hooking with a rabbet of the PC steel pipe pile and an inner curled edge for hooking with the rabbet of the Lassen steel sheet pile, wherein the outer curled edge extends downwards to the river bottom, the inner curled edge extends downwards to the top plate of the underwater channel, and the lower end of the special-shaped drawknot steel sheet pile also extends downwards to the river bottom; a water facing side of each special-shaped drawknot steel sheet pile is provided with a water facing brick wall, and a clay mortar interlayer is arranged between each special-shaped drawknot steel sheet pile and the water facing brick wall; thus, both sides of the special-shaped drawknot steel sheet pile at the rear side are respectively engaged with the PC steel pipe pile at the outer side and the Larson steel sheet pile lock catch at the inner side through the inner and outer curls, so that a certain water stopping effect and supporting rigidity are preliminarily provided, but because the Larson steel sheet pile at the inner side only extends downwards to the top plate of the underwater channel instead of the river bottom, only the upper part of the inner side of the special-shaped drawknot steel sheet pile is engaged with the Larson steel sheet pile, but the lower part of the inner side of the special-shaped drawknot steel sheet pile is not engaged with the side wall of the underwater channel, and the water pressure at the lower part of the special-shaped drawknot steel sheet pile is larger, so that the water stopping effect of the lower part of the special-shaped drawknot steel sheet pile is imperfect only by one layer of special-shaped drawknot steel sheet pile; therefore, a water facing brick wall is built on the front side of the special-shaped drawknot steel sheet pile, namely the water facing side, and a clay mortar interlayer is backfilled between the water facing brick wall and the special-shaped drawknot steel sheet pile for tamping, so that a front, middle and rear three-layer water stopping structure is formed between the main wall body and the left front retaining wall or the left rear retaining wall, the defect that the water stopping effect of the gap between the two sides of the main wall body and the left front retaining wall or the left rear retaining wall is imperfect is thoroughly solved, and the anti-seepage water stopping performance of the transition retaining wall is further improved on the whole.
As another preferable mode, the two concrete raised strips and the top plate of the left half-width underwater channel are integrally cast; the section of the left concrete raised line is wedge-shaped with lower left and higher right, and the section of the right concrete raised line is wedge-shaped with lower right and higher left; like this, sand grip and the integrative pouring of roof can ensure the connection firmness of concrete sand grip and roof, and combines two sand grip cross-section front-back symmetrical structure can provide stronger support to each Lasen steel sheet pile bottom in the middle to guarantee that whole row Lasen steel sheet pile builds in the firm reliability of effect in the mounting groove joint.
Drawings
Fig. 1 is a schematic structural view of the left half construction of a transitional retaining wall of a cofferdam type underwater foundation pit supporting system for constructing an underwater passage.
Fig. 2 is a schematic diagram of a top view structure of a transition retaining wall of a cofferdam type underwater foundation pit supporting system for constructing an underwater passage in the present utility model during left half construction.
Fig. 3 is an enlarged schematic view of the portion a in fig. 1.
Fig. 4 is an enlarged schematic view of a portion B in fig. 2.
Fig. 5 is a schematic view of the structure of fig. 1, with the left rear wall and the interfacial wall removed, and deflected to an angle.
Fig. 6 is a schematic structural diagram of the transition retaining wall of the cofferdam type underwater foundation pit supporting system for constructing an underwater passage in the right half construction.
Shown in the figure are 1, an underwater channel, 1.1, a top plate, 2, concrete convex strips, 3, a mounting groove, 4, a main wall body, 4.1, a right convex Lassen steel sheet pile, 4.2, a left convex Lassen steel sheet pile, 4.3, a steel bracket, 5, a first steel purlin, 6, a split bolt, 7, a right front retaining wall, 8, a left front retaining wall, 9, a second steel purlin, 10, a right rear retaining wall, 11, a left rear retaining wall, 12, a special-shaped drawknot steel sheet pile, 12.1, an inner curled edge, 12.2, an outer curled edge, 13, a Lassen steel sheet pile rabbet, 14, a PC steel pipe pile rabbet, 15, a water facing brick wall, 16 and a clay mortar sandwich.
Detailed Description
The utility model will be further described with reference to the drawings and the specific examples.
As shown in fig. 1 to 6, the transition retaining wall of the cofferdam type underwater foundation pit supporting system for constructing an underwater passage of the present utility model comprises a main wall body 4 positioned on a top plate 1.1 of a left half reinforced concrete underwater passage 1.
Two concrete raised strips 2 extending along the length direction of the river channel are arranged on the top plate 1.1 of the left half-width underwater channel 1, the two concrete raised strips 2 and the top plate 1.1 together form an installation groove 3, and fly ash clay mortar is filled in the installation groove 3. The two concrete raised strips 2 and the top plate 1.1 of the left half-width underwater channel 1 are integrally cast; the sections of the two concrete raised strips 2 are symmetrical to each other along the central line of the mounting groove 3, namely, the section of the left concrete raised strip 2 is in a wedge shape with low left and high right, and the section of the right concrete raised strip 2 is in a wedge shape with low right and high left.
The main wall 4 comprises a row of continuous locking Larson steel sheet piles, which comprises right convex Larson steel sheet piles 4.1 and left convex Larson steel sheet piles 4.2 which are arranged at intervals, and each Larson steel sheet pile is connected with the adjacent Larson steel sheet pile through a tongue and groove. The bottom ends of the Larson steel sheet piles are inserted into the mounting grooves 3, and the Larson steel sheet piles and the fly ash clay mortar are bonded and embedded.
The upper part of the Larson steel sheet pile is fixed with a first steel purlin 5 parallel to the mounting groove 3. The right surface of each right convex Lassen steel sheet pile 4.1 of the row Lassen steel sheet piles is welded with a steel bracket 4.3, a first steel purlin 5 is placed on the steel bracket 4.3, and a flange plate of the first steel purlin 5 is fixedly tied with each left convex Lassen steel sheet pile 4.2 through a pair of pull bolts 6.
After the left half width is finished, when constructing the right half width cofferdam, the right front retaining wall 7 and the left front retaining wall 8 retaining part of the cofferdam type underwater foundation pit supporting system are jointly provided with a second steel enclosing purlin 9 extending along the width direction of a river channel, the right rear retaining wall 10 and the left rear retaining wall 11 retaining part are also jointly provided with a second steel enclosing purlin 9, and the front end and the rear end of the first steel enclosing purlin 5 are respectively welded and fixed with the front second steel enclosing purlin 9 and the rear second steel enclosing purlin 9.
The gap between the front side of the main wall body 4 and the left front retaining wall 8 or the gap between the rear side of the main wall body 4 and the left rear retaining wall 11 is provided with a front layer, a middle layer and a rear layer of water stop structures, specifically speaking, a special-shaped drawknot steel sheet pile 12 is arranged between the forefront side Lasen steel sheet pile of the main wall body 4 and the nearest PC steel pipe pile in the left front retaining wall 8, and a special-shaped drawknot steel sheet pile 12 is also arranged between the forefront side Lasen steel sheet pile of the main wall body 4 and the nearest PC steel pipe pile in the left rear retaining wall 11; each special-shaped drawknot steel sheet pile 12 comprises a vertical inner curled edge 12.1 and an outer curled edge 12.2, the outer curled edge 12.2 extends downwards to the river bottom, the inner curled edge 12.1 extends downwards to the top plate 1.1 of the underwater channel 1, and the lower end of the special-shaped drawknot steel sheet pile 12 also extends downwards to the river bottom; the inner curled edge 12.1 of each special-shaped drawknot steel sheet pile 12 is hooked with the corresponding Larson steel sheet pile rabbet 13, and the outer curled edge 12.2 of each special-shaped drawknot steel sheet pile 12 is hooked with the corresponding PC steel pipe pile rabbet 14; a water facing brick wall 15 is arranged on the water facing masonry of each special-shaped drawknot steel sheet pile 12, and a clay mortar interlayer 16 is backfilled between each special-shaped drawknot steel sheet pile 12 and the water facing brick wall 15.
Of course, the present application will be described by taking the construction sequence of the left half frame and the right half frame as an example, and the above description is merely illustrative, and not restrictive. If the construction sequence is right-first and left-second, the transition retaining wall is inserted into the top plate 1.1 of the right half underwater channel 1, the concrete raised strips 2 are integrally cast on the top plate 1.1 of the right half underwater channel 1, and the second steel purlin 9 is correspondingly fixed on the left half front retaining wall and the left half retaining wall.
Claims (5)
1. The utility model provides a transition barricade of cofferdam support system that construction passageway was used under water, its characterized in that includes the main wall body that is located on the roof of left half width of cloth passageway under water: two concrete raised strips extending along the length direction of the river channel are arranged on the top plate of the left half underwater channel, the two concrete raised strips and the top plate jointly form a mounting groove, and fly ash clay mortar is filled in the mounting groove; the main wall body comprises a row of continuous locking Larson steel sheet piles which are inserted in the mounting groove and are embedded with the fly ash clay mortar; the upper part of the Larson steel sheet pile is fixed with a first steel enclosing purlin parallel to the mounting groove.
2. The transitional retaining wall of a cofferdam support system for constructing an underwater passageway of claim 1, wherein: the right surface of each right convex Lassen steel sheet pile of the main wall body is welded with a steel bracket, the first steel purlin is enclosed on the steel bracket, and a flange plate of the first steel purlin is enclosed and fixed with each left convex Lassen steel sheet pile through a pair of draw bolts.
3. The transition retaining wall of a cofferdam support system for constructing an underwater passageway as claimed in claim 2, wherein: the right front retaining wall of the cofferdam type underwater foundation pit supporting system is provided with a second steel enclosing purlin extending along the width direction of the river channel, the right rear retaining wall of the cofferdam type underwater foundation pit supporting system is also provided with a second steel enclosing purlin, and the front end and the rear end of the first steel enclosing purlin are respectively welded and fixed with the front second steel enclosing purlin and the rear second steel enclosing purlin.
4. The transitional retaining wall of a cofferdam support system for constructing an underwater passageway of claim 1, wherein: a special-shaped drawknot steel sheet pile is arranged between the forefront Larson steel sheet pile of the main wall body and the nearest PC steel pipe pile in the left front retaining wall, and a special-shaped drawknot steel sheet pile is also arranged between the rearmost Larson steel sheet pile and the nearest PC steel pipe pile in the left rear retaining wall; each special-shaped drawknot steel sheet pile comprises an outer curled edge for hooking with a rabbet of the PC steel pipe pile and an inner curled edge for hooking with the rabbet of the Lassen steel sheet pile, wherein the outer curled edge extends downwards to the river bottom, the inner curled edge extends downwards to the top plate of the underwater channel, and the lower end of the special-shaped drawknot steel sheet pile also extends downwards to the river bottom; the water facing side of each special-shaped drawknot steel sheet pile is provided with a water facing brick wall, and a clay mortar interlayer is arranged between each special-shaped drawknot steel sheet pile and the water facing brick wall.
5. The transitional retaining wall of a cofferdam support system for constructing an underwater passageway of claim 1, wherein: the two concrete raised strips and the top plate of the left half underwater channel are integrally cast; the section of the left concrete raised line is wedge-shaped with the left lower side and the right higher side, and the section of the right concrete raised line is wedge-shaped with the right lower side and the left higher side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320492294.9U CN219450747U (en) | 2023-03-09 | 2023-03-09 | Transitional retaining wall of cofferdam supporting system for constructing underwater passage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320492294.9U CN219450747U (en) | 2023-03-09 | 2023-03-09 | Transitional retaining wall of cofferdam supporting system for constructing underwater passage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219450747U true CN219450747U (en) | 2023-08-01 |
Family
ID=87412573
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320492294.9U Active CN219450747U (en) | 2023-03-09 | 2023-03-09 | Transitional retaining wall of cofferdam supporting system for constructing underwater passage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219450747U (en) |
-
2023
- 2023-03-09 CN CN202320492294.9U patent/CN219450747U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN212404825U (en) | Prefabricated plate joint structure with bottom die | |
| WO2023024348A1 (en) | Recyclable prestressed support system and construction method | |
| CN111691574B (en) | Prefabricated assembly type shear wall vertical joint connecting structure and construction method thereof | |
| CN108239984B (en) | Trapezoidal wave shaped steel plate and steel truss combined assembled type enclosure structure and construction method thereof | |
| CN212506415U (en) | Subway station faces combination open cut forever and is in same direction as building structure | |
| CN213296031U (en) | Novel assembled concrete gallery road structure on water | |
| CN101666085B (en) | Prefabricated part composite cement soil wall and construction method thereof | |
| CN219450747U (en) | Transitional retaining wall of cofferdam supporting system for constructing underwater passage | |
| CN211312570U (en) | Can have enough to meet need formula steel open caisson supporting device | |
| CN110130934B (en) | Construction method of urban tunnel branch junction with box-type top plate structure | |
| CN217758841U (en) | Layered sectional type upright self-stabilizing enclosure structure | |
| CN110607800A (en) | Turnover type steel open caisson supporting device and construction method thereof | |
| CN210002441U (en) | Box-type top plate structure for large-span urban tunnel | |
| CN210315651U (en) | Upward inclined concrete wall formwork supporting and reinforcing structure | |
| CN210857267U (en) | Pile sheet type retaining wall integral casting template structure | |
| CN116289985A (en) | Transitional retaining wall of cofferdam supporting system for constructing underwater passage | |
| CN210766887U (en) | Face combination underground groove type structure forever | |
| CN217206469U (en) | Large-section rectangular pipe jacking block pipe joint | |
| CN219731793U (en) | I-steel clamping groove type precast concrete guardrail structure | |
| CN219992481U (en) | Assembled supporting system suitable for open cut subway station | |
| CN214993530U (en) | A seepage prevention structure for river course ecological remediation | |
| CN216615864U (en) | Underground foundation pit supporting structure based on existing building | |
| CN210163934U (en) | Cast-in-place pile formwork system | |
| CN217000063U (en) | Modular drainage inspection shaft | |
| CN216640596U (en) | Assembled combination concrete porous sheet pile supports reinforced structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |