CN214363559U

CN214363559U - Double-wall steel-sheathed box cofferdam device

Info

Publication number: CN214363559U
Application number: CN202120208415.3U
Authority: CN
Inventors: 李博; 刘峰峰; 聂宁; 孙志武; 张富杰; 李志强; 王鹏; 田世林; 伏佳欣
Original assignee: CCCC SHB Fifth Engineering Co Ltd
Current assignee: CCCC SHB Fifth Engineering Co Ltd
Priority date: 2021-01-25
Filing date: 2021-01-25
Publication date: 2021-10-08
Anticipated expiration: 2031-01-25

Abstract

The application relates to the technical field of overwater steel cofferdam construction, in particular to a double-wall steel boxed cofferdam device, which comprises a steel boxed cofferdam and a sand discharge mechanism, wherein the steel boxed cofferdam comprises an inner panel and an outer panel, the inner panel and the outer panel are both arranged in an annular shape, the inner panel is sleeved in the outer panel, a gap is reserved between the inner panel and the outer panel, and the lower end of the inner panel is fixedly connected with the lower end of the outer panel; the sand discharge mechanism is arranged between the inner panel and the outer panel and is communicated with the outside for discharging sand below. This application has the effect of the defect of sinking the difficulty when improving steel bushing box construction.

Description

Double-wall steel-sheathed box cofferdam device

Technical Field

The application relates to the technical field of construction of overwater steel cofferdams, in particular to a double-wall steel boxed cofferdam device.

Background

In the construction of bridges and hydraulic engineering, when the construction position is underwater, cofferdam construction needs to be carried out firstly. The steel pouring jacket cofferdam has the advantages of simple structure, convenience in installation and the like, so that the steel pouring jacket cofferdam is widely applied in recent years.

During construction, pile foundation construction is firstly carried out, the steel sleeve box cofferdam is sleeved at the periphery of the pile foundation and sinks into sandy soil after the pile foundation construction is completed, so that a closed working space is formed, concrete is poured in the steel sleeve box cofferdam for bottom sealing, water in a steel sleeve box is discharged, the upper surface of bottom sealing concrete is basically flush with the upper end of the pile foundation, and then a bearing platform is constructed on the bottom sealing concrete and the pile foundation.

However, in the process of placing the steel box cofferdam, the bottom of the steel box cofferdam is closed, so that the resistance is large in the sinking process, and the sinking construction is difficult.

In view of the above-described related art, the inventors have considered that there is a drawback that sinking is difficult due to large sinking resistance.

SUMMERY OF THE UTILITY MODEL

In order to improve the defect that sinks the difficulty when steel boxed construction, this application provides a double-walled steel boxed cofferdam device.

The application provides a double-walled steel casing box cofferdam device adopts following technical scheme:

a double-wall steel sleeve box cofferdam device comprises a steel sleeve box and a sand discharge mechanism, wherein the steel sleeve box comprises an inner panel and an outer panel, the inner panel and the outer panel are both arranged in a ring shape, the inner panel is sleeved in the outer panel, a gap is reserved between the inner panel and the outer panel, and the lower end of the inner panel is fixedly connected with the lower end of the outer panel; the sand discharge mechanism is arranged between the inner panel and the outer panel and is communicated with the outside for discharging sand below.

Through adopting above-mentioned technical scheme, when carrying out steel casing box cofferdam construction, subside the steel casing box vertically downwards, when too big unable sinking of resistance, the sand discharge mechanism starts and arranges away the sand below the steel casing box to make the steel casing box can continue to sink to preset position under the action of gravity, thereby improve the defect of steel casing box construction sinking difficulty to a certain extent.

Optionally, the sand discharge mechanism comprises a plurality of sand pumps and sand pumping pipes, the sand pumps are arranged between the inner panel and the outer panel in a circumferential array mode, sand inlets of the sand pumps are communicated with the outside, and the sand pumping pipes are fixedly connected with sand outlets of the sand pumps.

Through adopting above-mentioned technical scheme, when steel bushing box resistance of sinking is great, take out the sand pipe and take out the sand below the steel bushing box and discharge by taking out the sand pipe for steel bushing box below is unsettled, can continue to sink under the action of gravity afterwards, improves the defect that the steel bushing box sinks the difficulty.

Optionally, the upper end of the sand pumping pipe is higher than the upper end of the steel sleeve box, and the upper end of the sand pumping pipe is inclined downwards towards the direction far away from the axis of the inner panel.

Through adopting above-mentioned technical scheme, sand pumping pipe upper end exceeds steel bushing case upper end and leans out simultaneously for sand that sand pump took is arranged to steel bushing case periphery through taking out the sand pipe, buries steel bushing case outside grafting department when improving steel bushing case and sink the difficulty defect, promotes grafting stability.

Optionally, the sand discharge mechanism comprises a plurality of high-pressure water spray assemblies, and the high-pressure water spray assemblies are circumferentially arrayed between the inner panel and the outer panel and penetrate through the bottom of the steel jacket box to be communicated with the outside.

By adopting the technical scheme, when the sinking resistance of the steel sleeve box is large, the high-pressure water spraying assembly sprays water to wash away sandy soil below the steel sleeve box, so that the steel sleeve box continues to sink under the action of gravity, and the defect that the steel sleeve box is difficult to sink is overcome.

Optionally, the high-pressure water spray assembly comprises a high-pressure sprayer, a water pump and a water pumping pipe, the high-pressure sprayer is fixedly arranged at the bottom of the steel sleeve box and is communicated with the outside, a water pump water outlet is communicated with the high-pressure sprayer, and the water pumping pipe is fixedly connected with a water pump water inlet.

Through adopting above-mentioned technical scheme, the water pump passes through the drinking-water pipe and gets water and pump sending to high pressure nozzle department from the external world, and the sand and soil of steel bushing box lower part is washed away to the high pressure nozzle water spray to improve the defect that the steel bushing box sinks the difficulty.

Optionally, the drinking-water pipe upper end is higher than steel bushing box upper end, just the drinking-water pipe is kept away from the one end orientation of water pump is kept away from the direction downward sloping setting of interior panel axis.

Through adopting above-mentioned technical scheme, water pump accessible drinking-water pipe draws water from the steel bushing case periphery to can constantly supply water to high pressure nozzle in the work progress, improve the practicality of device.

Optionally, the lower end of the outer panel is arranged in a downward inclination manner, and the inclination direction is directed to the axis of the inner panel from the side far away from the axis of the inner panel.

Through adopting above-mentioned technical scheme, steel bushing box lower part sets up to slope structure to reduce the resistance when the steel bushing box sinks, be convenient for the steel bushing box sink and insert in the sand.

Optionally, a transverse rib and a longitudinal rib are arranged between the inner panel and the outer panel, the transverse rib is fixedly connected with the inner panel and the outer panel respectively, and the longitudinal rib is fixedly connected with the inner panel and the outer panel respectively; the transverse ribs and the longitudinal ribs are perpendicular to each other.

Through adopting above-mentioned technical scheme, be connected and consolidate between interior panel and the outside panel through setting up horizontal rib and vertical rib to keep the steel pouring jacket comparatively light when promoting steel pouring jacket intensity.

In summary, the present application includes at least one of the following beneficial technical effects:

1. when the steel sleeve box is constructed in a sinking way, the sand below the steel sleeve box is continuously discharged through a sand pump or a high-pressure water spraying assembly, so that the lower end of the steel sleeve box is in a suspended state, the steel sleeve box continuously sinks to a preset position under the action of gravity, and the defect that the steel sleeve box is difficult to sink is overcome to a certain extent;

2. the upper end of the sand pumping pipe is higher than the upper end of the steel sleeve box and is obliquely arranged outside, so that sand pumped by the sand pumping pump is discharged to the outer side of the steel sleeve box, and the vertical installation strength of the steel sleeve box is further enhanced;

3. the upper end of the water pumping pipe is inserted into water, so that the water can be continuously pumped from the outer side of the steel jacket box through the water pumping pipe of the high-pressure water spraying assembly, and the practicability of the device is improved.

Drawings

FIG. 1 is a schematic structural diagram of a double-wall steel boxed cofferdam device in embodiment 1 of the application;

FIG. 2 is a perspective sectional view of a double-wall steel boxed cofferdam device in the embodiment 1 of the application;

FIG. 3 is an enlarged schematic view of portion A of FIG. 2;

FIG. 4 is a perspective sectional view of a double-wall steel boxed cofferdam device in the embodiment 2 of the application;

FIG. 5 is an enlarged view of portion B of FIG. 4;

fig. 6 is an enlarged schematic view of part C of fig. 4.

Description of reference numerals: 1. a steel jacket box; 11. an inner panel; 12. an outer panel; 13. a cross rib; 14. longitudinal ribs; 2. a sand discharge mechanism; 21. a sand pump; 22. a sand pumping pipe; 23. a high pressure water spray assembly; 231. a high pressure spray head; 232. a water pump; 233. a water pumping pipe; 3. a pile foundation; 4. a bearing platform; 5. and (5) sealing the bottom concrete.

Detailed Description

The present application is described in further detail below with reference to figures 1-6.

The embodiment of the application discloses double-walled steel boxed cofferdam device.

Example 1

Referring to fig. 1 and 2, the double-wall steel sleeve box cofferdam device comprises a steel sleeve box 1 and a sand discharge mechanism 2, wherein the steel sleeve box 1 comprises an inner panel 11 and an outer panel 12, the inner panel 11 and the outer panel 12 are both annular, the inner panel 11 is coaxially sleeved in the outer panel 12, a gap is reserved between the outer panel 12 and the inner panel 11, and the lower end of the gap is closed. The sand discharge mechanism 2 is fixedly arranged in the steel sleeve box 1 and is used for discharging sand below.

When carrying out cofferdam construction, subside the vertical setting of steel jacket case 1 downwards, when steel jacket case 1 was unable to continue to sink because of the too big resistance, sand discharge mechanism 2 starts to arrange away the sand soil of steel jacket case 1 below to make steel jacket case 1 unsettled, thereby make steel jacket case 1 continue to sink under the action of gravity, circulate this step and sink to preset position to steel jacket case 1, thereby improve the defect that steel jacket case 1 sinks the difficulty to a certain extent.

Specifically, a transverse rib 13 and a longitudinal rib 14 are disposed between the inner panel 11 and the outer panel 12, referring to fig. 2, the transverse rib 13 and the longitudinal rib 14 are disposed between the inner panel 11 and the outer panel 12 in a circumferential array, the transverse rib 13 and the longitudinal rib 14 are respectively fixedly disposed between the inner panel 11 and the outer panel 12 by welding, and the transverse rib 13 and the longitudinal rib 14 are perpendicular to each other. The lower end of the outer panel 12 is obliquely arranged, the oblique direction of the lower end of the outer panel points to the axis of the inner panel 11 from the direction far away from the axis of the inner panel 11, and the lower end of the outer panel 12 is welded and fixed with the inner panel 11.

Furthermore, the sand discharge mechanism 2 comprises a sand pump 21 and a sand pump pipe 22, referring to fig. 2 and 3, the sand pump 21 is welded and fixed on the inner wall of the outer panel 12, a sand inlet of the sand pump 21 penetrates through the lower end of the steel jacket box 1 to be communicated with the outside, and the sand pump pipe 22 is fixedly connected with a sand outlet of the sand pump 21 through threaded connection. The sand pumping pipe 22 is vertically arranged and welded on the inner wall of the outer panel 12, and the upper end of the sand pumping pipe 22 is higher than the upper end of the outer panel 12 and is inclined downwards towards the direction far away from the axis of the inner panel 11.

During construction of the steel pouring jacket 1 cofferdam, after the pile foundation 3 is installed, the steel pouring jacket 1 is sleeved on the periphery of the pile foundation 3 to sink, when the steel pouring jacket 1 is prevented from sinking continuously due to large resistance, the sand pump 21 is started to pump out sand below the steel pouring jacket 1, so that the steel pouring jacket 1 is in a suspended state and sinks under the action of gravity, and the steel pouring jacket 1 sinks to a preset position in a cyclic step. Meanwhile, the sand pumped by the sand pump 21 in the process of sinking the steel pouring jacket 1 is conveyed to the outer side of the steel pouring jacket 1 through the sand pumping pipe 22 and discharged, the discharged sand covers the splicing part at the outer side of the steel pouring jacket 1, the splicing stability is improved, and the defect of difficulty in sinking during the construction of the steel pouring jacket 1 is overcome. After the steel pouring jacket 1 sinks and is constructed, the construction of bottom sealing concrete 5 and the construction of the bearing platform 4 can be carried out in the steel pouring jacket 1.

The implementation principle of the embodiment 1 is as follows: when carrying out 1 cofferdam construction of steel jacket case, at first with 1 vertical hoist and settlement downwards of steel jacket case along the axial, when 1 too big unable continuation of resistance of steel jacket case sinks, sand pump 21 starts and takes out the sand below 1 steel jacket case, thereby make 1 unsettled of steel jacket case, make 1 steel jacket case continue to sink under the action of gravity, the cycle is step to 1 steel jacket case and is sunken predetermined position, thereby improve the defect that 1 steel jacket case sinks the difficulty to a certain extent.

Example 2

Referring to fig. 4 to 6, the present embodiment is different from embodiment 1 in that: arrange sand mechanism 2 in this embodiment and set up to high pressure water spray assembly 23, high pressure water spray assembly 23 includes high pressure nozzle 231, water pump 232 and drinking-water pipe 233, high pressure nozzle 231 welded fastening just communicates with the external world in steel pouring jacket 1 bottom, water pump 232 welded fastening is on outer panel 12 inner wall and the water pump 232 delivery port passes through pipeline and high pressure nozzle 231 intercommunication, drinking-water pipe 233 passes through threaded connection and water pump 232 water inlet intercommunication, the one end that drinking-water pipe 233 kept away from water pump 232 is higher than on outer panel 12 along and towards the direction downward sloping setting of keeping away from outer panel 12 axis.

When the steel pouring jacket 1 sinks with large resistance, the water pump 232 pumps water from the outer side of the steel pouring jacket 1 through the water pumping pipe 233 and sprays out of the high-pressure spray head 231, so that sand below the steel pouring jacket 1 is washed away, the steel pouring jacket 1 is suspended and sinks under the action of gravity, the step is repeated until the steel pouring jacket 1 sinks to a preset position, and the defect that the steel pouring jacket 1 sinks difficultly is overcome to a certain extent.

The implementation principle of the embodiment 2 is as follows: when the steel pouring jacket 1 can not sink continuously due to too large resistance, the sand below the steel pouring jacket 1 is washed away by the high-pressure water spraying assembly 23, so that the steel pouring jacket 1 sinks continuously, and the steps are repeated until the steel pouring jacket 1 sinks to the preset position.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a double-walled steel boxed cofferdam device which characterized in that: the sand discharging device comprises a steel jacket box (1) and a sand discharging mechanism (2), wherein the steel jacket box (1) comprises an inner panel (11) and an outer panel (12), the inner panel (11) and the outer panel (12) are both arranged in an annular shape, the inner panel (11) is sleeved in the outer panel (12), a gap is reserved between the inner panel (11) and the outer panel (12), and the lower end of the inner panel (11) is fixedly connected with the lower end of the outer panel (12); the sand discharge mechanism (2) is arranged between the inner panel (11) and the outer panel (12) and is communicated with the outside for discharging sand below.

2. A double-walled steel boxed cofferdam apparatus according to claim 1, characterized in that: arrange sand mechanism (2) and include a plurality of sand pumps (21) and take out sand pipe (22), sand pump (21) circumference array sets up interior panel (11) with between outer panel (12), sand pump (21) advance sand mouth and external intercommunication, take out sand pipe (22) with sand pump (21) sand outlet fixed connection.

3. A double-walled steel boxed cofferdam apparatus according to claim 2, characterized in that: the upper end of the sand pumping pipe (22) is higher than the upper end of the steel pouring jacket (1), and the upper end of the sand pumping pipe (22) is downwards inclined towards the direction far away from the axis of the inner panel (11).

4. A double-walled steel boxed cofferdam apparatus according to claim 1, characterized in that: arrange sand mechanism (2) and include a plurality of high pressure water spray assembly (23), high pressure water spray assembly (23) circumference array sets up interior panel (11) with between outer panel (12), and pass steel pouring jacket (1) bottom and external intercommunication.

5. A double-walled steel boxed cofferdam apparatus according to claim 4, characterized in that: high pressure water spray subassembly (23) include high pressure nozzle (231), water pump (232) and drinking-water pipe (233), high pressure nozzle (231) are fixed to be set up steel pouring jacket (1) bottom and with external intercommunication, water pump (232) delivery port with high pressure nozzle (231) intercommunication, drinking-water pipe (233) with water pump (232) water inlet fixed connection.

6. A double-walled steel boxed cofferdam apparatus according to claim 5, characterized in that: the upper end of the water pumping pipe (233) is higher than the upper end of the steel pouring jacket (1), and one end of the water pumping pipe (233) far away from the water pump (232) faces towards the direction of keeping away from the axis of the inner panel (11) and is inclined downwards.

7. A double-walled steel boxed cofferdam apparatus according to claim 1, characterized in that: the lower end of the outer panel (12) is arranged in a downward inclined mode, and the inclined direction is towards the axis of the inner panel (11) from the side far away from the axis of the inner panel (11).

8. A double-walled steel boxed cofferdam apparatus according to claim 1, characterized in that: a transverse rib (13) and a longitudinal rib (14) are arranged between the inner panel (11) and the outer panel (12), the transverse rib (13) is fixedly connected with the inner panel (11) and the outer panel (12) respectively, and the longitudinal rib (14) is fixedly connected with the inner panel (11) and the outer panel (12) respectively; the transverse ribs (13) and the longitudinal ribs (14) are perpendicular to each other.