CN111254807A - Transfer bridge for transferring earthwork of deep and large foundation pit and earthwork excavating and transporting method - Google Patents
Transfer bridge for transferring earthwork of deep and large foundation pit and earthwork excavating and transporting method Download PDFInfo
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- CN111254807A CN111254807A CN202010219484.4A CN202010219484A CN111254807A CN 111254807 A CN111254807 A CN 111254807A CN 202010219484 A CN202010219484 A CN 202010219484A CN 111254807 A CN111254807 A CN 111254807A
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- door frame
- trestle
- earth
- foundation pit
- earthwork
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D15/00—Movable or portable bridges; Floating bridges
- E01D15/06—Bascule bridges; Roller bascule bridges, e.g. of Scherzer type
- E01D15/08—Drawbridges
Abstract
The invention discloses a transfer bridge for transporting earthwork of a deep and large foundation pit and an earthwork excavating and transporting method, wherein the transfer bridge is arranged on the earthwork outside the foundation pit and comprises a door frame, a ground beam, a suspension trestle and a trestle hoisting mechanism, the door frame is vertically arranged, the ground beam and the suspension trestle are respectively arranged at the front side and the rear side of the door frame, and the trestle hoisting mechanism comprises at least one steel cable fixedly connected with the suspension trestle; the grade beam is fixed at the door frame lower extreme, is the level setting, suspend in midair the landing stage and rotationally install on the door frame, through transferring the steel cable rope, can form earth and rockfill transfer passage after suspending in midair the landing stage and transferring, through the pull-up steel cable rope, can be with suspending in midair the whole rising of one end that landing stage and steel cable rope are connected. The transfer bridge for transferring the earthwork of the deep and large foundation pit and the earthwork excavation and transportation method can be used for transferring the earthwork of the deep and large foundation pit for multiple times, facilitate transportation of the earthwork and can improve the excavation progress of the earthwork.
Description
Technical Field
The invention relates to a foundation pit excavation process, in particular to a transfer bridge for transferring earth and stone squares of a deep and large foundation pit and an earth and stone square excavation and transportation method.
Background
The existing deep and large foundation pit construction is that the excavation is carried out in layers from the foundation pit top, the protection is carried out while the excavation is carried out, and the excavation first-stage protection is formed into the first stage. In construction, in order to transport earthwork conveniently, a slope is required to be placed on one side of a foundation pit as a channel for transporting an earthwork truck when a first-stage foundation pit is excavated, and the deeper the foundation pit is, the longer the slope is, and the foundation pit construction working surface is occupied; in addition, the earth and stone on the slope is removed and transported out of the foundation pit at last, and then the foundation pit can be used as a building enclosure, so that the construction progress can be influenced.
In order to solve the problem, the intellectual property office of China discloses a container type earthwork excavating and transporting method for a deep foundation pit. This purlin of earthwork excavation fortune mode adoption hangs handling soil box, though can effectively promote efficiency, the purlin hangs the cost height, and the installation is also comparatively troublesome and time-consuming, is not suitable for promoting on a large scale.
Disclosure of Invention
Aiming at the defects of the prior art, the technical problems to be solved by the invention are as follows: how to provide a can have enough to meet need many times, make things convenient for the transportation of earth and stone side, and can promote the transport bridge and the earth and stone side excavation method that are used for dark big foundation ditch earth and stone side transportation of excavation progress.
In order to solve the technical problems, the invention adopts the following technical scheme:
a transfer bridge for transferring earthwork of a deep and large foundation pit is arranged on the earthwork outside the foundation pit and is characterized by comprising a door frame, a floor beam, a suspension trestle and a trestle lifting mechanism, wherein the door frame is vertically arranged, the floor beam and the suspension trestle are respectively arranged on the front side and the rear side of the door frame, and the trestle lifting mechanism comprises at least one steel cable fixedly connected with the suspension trestle; the grade beam is fixed at the door frame lower extreme, is the level setting, suspend in midair the landing stage and rotationally install on the door frame, transfer the wire rope through landing stage hoist mechanism's power device, can form earth and rockfill transfer passage after suspending in midair the landing stage and transferring, through the steel rope that draws upward, can be with suspending in midair the whole rising of one end that landing stage and wire rope are connected. Like this, the suspension trestle of transfer bridge can be used as current slope, for haulage vehicle provides the transport corridor, folds up the back suspension bridge and also can not influence remaining earthwork excavation. The transfer bridge can be repeatedly used for many times, and has a simple structure and can be repeatedly used for many times. The ground beam that sets up can be fixed with the earth outside the excavation region to come the transfer or the pull-up of control suspension trestle through the steel cable, control the mode comparatively simple.
Further, landing stage hoist mechanism still includes the hoist engine, the one end of steel cable rope is fixed and twines on the reel of hoist engine, and the other end is walked around door frame top after-fixing in the front end that suspends the landing stage in midair, installs at the door frame top and supplies the gliding gyro wheel of steel cable rope. Like this, through the receive and release of hoist control steel cable rope, control mode is comparatively accurate, and the gyro wheel that sets up at the door frame top, reducible steel cable rope is receiving and releasing the friction of in-process and door frame.
Furthermore, the door frame is square, including being the stand that sets up about, is fixed with a portal frame roof beam and door grade beam between the coexistence post, portal frame roof beam and door grade beam are setting from top to bottom. Like this, the door frame structure is firm, and the grade beam can also pass through the fastener with ground and fix.
Furthermore, the upper ends of the two vertical columns extend out of the door frame beam, and the number of the rollers, the winch and the steel cable is two; the two winches are fixed on the left side and the right side of the ground beam, and the two rollers are respectively installed on the extending ends of the two vertical columns. Therefore, the steel cable and the winch are arranged on the two sides to control the suspension trestle, and the suspension trestle is more stable when being pulled upwards.
Further, the winch is an electric winch. Therefore, the electric control is more accurate, and the personnel cost is reduced.
Furthermore, the ground beam is frame-shaped and is fixed on the ground through a screw or a balancing weight. Like this, adopt the fix with screw ground roof beam, it is fixed firm, and adopt the balancing weight to fix, can not cause destruction to ground, and thicker to the soil layer, the condition of the fix with screw of not being convenient for is more suitable for.
Furthermore, one side of the door frame close to the ground beam is provided with two reinforcing inclined struts, and two ends of each reinforcing inclined strut are respectively fixedly connected with the door frame and the ground beam. Like this, fixed through the bracing between ground beam and the door frame, whole support body is the triangle body, and is very firm.
Furthermore, hang in midair the landing stage and include underframe and upper support plate, be equipped with two collars that are used for fixed steel cable rope in the front end of upper support plate. Like this, the backup pad can provide the holding surface for the transport vechicle, and the collar that sets up is convenient for steel cable rope's fixed.
A method for digging and transporting earth and stone in a deep and large foundation pit is characterized by comprising the following steps: s1, constructing the embedded piles at the periphery of the foundation pit according to design requirements, and marking an earth and rocky excavation area in the construction area; s2, assembling a transfer bridge on a platform outside the earth and rocky excavation area, wherein the transfer bridge comprises a door frame, a floor beam, a suspension trestle and a trestle lifting mechanism, the door frame is vertically arranged, the floor beam and the suspension trestle are respectively arranged on the front side and the rear side of the door frame, and the trestle lifting mechanism comprises at least one steel cable fixedly connected with the suspension trestle; the ground beam is fixed at the lower end of the door frame and is horizontally arranged, and the suspension trestle is rotatably arranged on the door frame; s3, fixing the ground beam of the assembled transfer bridge on a platform outside the earth and rocky excavation area, and enabling the suspension trestle connecting end of the transfer bridge to be completely positioned in the earth and rocky excavation area after being laid flat; s4, excavating earth and stone in an earth and stone excavation area, wherein during excavation, firstly excavating the part close to a transfer bridge, excavating the earth and stone at the position to the first-stage excavation depth of the foundation pit, then lowering the steel cable, and stopping lowering the steel cable until the front end of the suspension trestle contacts the earth and stone at the bottom, and at the moment, the suspension trestle forms a channel for transporting the earth and stone; s5, continuing to excavate the remaining earthwork, transporting the earthwork while excavating until reaching the first-stage excavation depth of the foundation pit, pulling up the steel cable, rotating the front end of the suspension trestle to the upper side, and fixing the steel cable; and S6, repeating S4-S5 until the earth and stone excavation is finished. Like this, when the earthwork excavation, need not set up the slope, once only excavate the earthwork, can effectively promote the efficiency of construction, simultaneously, the transportation bridge simple structure that adopts, simple to operate, the cost is low, and can reuse many times.
Drawings
FIG. 1 is a schematic view of the state of the transfer bridge during operation in the example.
In the figure: foundation pit 1, door frame 2, stand 21, portal roof beam 22, door grade beam 23, gyro wheel 24, reinforcement bracing 25, grade beam 3, suspend trestle 4, collar 41, steel cable 5, hoist engine 6, balancing weight 7.
Detailed Description
The invention is further illustrated with reference to the following figures and examples.
Example (b):
as shown in fig. 1, the transfer bridge for transporting the earthwork of the deep and large foundation pit is installed on the earthwork outside the foundation pit 1, and includes a door frame 2, a floor beam 3, a suspension trestle 4 and a trestle hoisting mechanism, the door frame 2 is vertically disposed, the floor beam 3 and the suspension trestle 4 are respectively disposed on the front side and the rear side of the door frame 2, the trestle hoisting mechanism includes two winches 6 and two steel cables 5, one end of each steel cable 5 is fixed and wound on a winding drum of the winch 6, and the other end of each steel cable 5 is fixed at the front end of the suspension trestle 4 after bypassing the top of the door frame 2; the utility model discloses a landing beam 3, including landing beam 4, landing beam 2, hoist engine 6, other power device, and the landing beam 3 is fixed at 2 lower extremes of door frame, is the level setting, suspend in midair landing stage 4 and rotationally install on door frame 2, transfer cable 5 through hoist engine 6 (when specifically implementing, can adopt other power device), can form earth and stone side transfer passage after suspending landing stage 4 and transferring in midair, through pull-up cable 5, can be with suspending in midair landing stage 4 and the whole back that risees of one end that steel cable 5 is connected, select to transfer landing stage 4 and rotate and be the form of.
In order to increase the strength of the transfer bridge, the door frame 2 and the ground beam 3 in the embodiment are assembled by adopting I-shaped steel. The length of the suspension trestle 4 in the embodiment is determined by the depth of a designed foundation pit and the climbing gradient of a vehicle for transporting earthwork. In specific implementation, the suspension trestle 4 may be of a telescopic structure. The weight of the trestle can be calculated according to the length of the suspended trestle and the material forming the suspended trestle, and therefore, in order to ensure the safety of the suspended trestle during construction, a counterweight can be added at the tail part of the ground beam close to the lifting mechanism.
As shown in the figure, the door frame 2 is square, including being the stand 21 that sets up about, two stands 21 upper ends all stretch out outside the door frame roof beam 22, are fixed with a door frame roof beam 22 and door grade beam 23 between two stands 21, door frame roof beam 22 is arranged in door grade beam 23 top. In addition, in order to reduce the abrasion of the steel cable 5, a groove is arranged at the top end of each upright post 21, and a roller 24 for the steel cable 5 to slide is arranged in each groove.
The hoist 6 in this embodiment is an electric hoist, and is fixed to the left and right sides of the floor beam 3. The ground beam 3 is frame-shaped, and the ground beam 3 is fixed on the ground through a screw or a balancing weight 7.
Two reinforcing inclined struts 25 are arranged on one side, close to the ground beam 3, of the door frame 2, and two ends of each reinforcing inclined strut 25 are fixedly connected with the door frame and the ground beam 3 respectively.
The suspension trestle 4 comprises a lower frame and an upper support plate, and two mounting rings 41 for fixing steel cables are arranged at the front end of the upper support plate.
A method for digging and transporting earth and stone squares of a deep and large foundation pit comprises the following steps: s1, constructing the embedded piles at the periphery of the foundation pit according to design requirements, and marking an earth and rocky excavation area in the construction area; s2, assembling a transfer bridge on the platform outside the earth and rocky excavation area, wherein the transfer bridge is as described above; s3, fixing the ground beam 3 of the assembled transfer bridge on a platform outside the earth and rocky excavation area, and enabling the connection end of the suspension trestle 4 of the transfer bridge to be completely positioned in the earth and rocky excavation area after being laid flat; s4, excavating earth and stone in an earth and stone excavation area, wherein during excavation, firstly excavating the part close to the transfer bridge, excavating the earth and stone at the position to the first-stage excavation depth of the foundation pit, then lowering the steel cable 5 until the front end of the suspension trestle 4 contacts the earth and stone at the bottom, and stopping lowering the steel cable 5, and at the moment, the suspension trestle 4 forms a channel for transporting the earth and stone; s5, continuing to excavate the remaining earthwork, transporting the earthwork while excavating until reaching the first-stage excavation depth of the foundation pit, pulling up the steel cable 5 to lift the front end of the suspension trestle 4, rotating the rear end of the suspension trestle 4 simultaneously, and fixing the steel cable 5 after the front end of the suspension trestle 4 is lifted to a position above the foundation pit; and S6, repeating S4-S5 until the earth and stone excavation is finished.
In the embodiment, the suspension trestle is formed by taking a 15MM thick steel plate as a trestle plate, welding a # -shaped I-shaped steel rib at the lower part of the suspension trestle, and welding a mounting ring at a position 200MM above the trestle plate surface on one end of the contact surface of the suspension trestle and the bottom of the foundation pit.
Taking excavation of a foundation pit with the length of 6 meters as an example, the maximum gradient of the suspended trestle 4 is 30 degrees, so that the minimum length of the ramp is 13.4 meters, and an integer of 14 meters is taken for processing the trestle. Firstly, the suspension trestle 4 is hoisted, the soil body at the lower part of the suspension trestle is excavated to 2 m depth by adopting an excavator, then the suspension trestle is placed, and the vehicle can excavate the position with the depth of 2 m in the range of the large foundation pit in a large area by the suspension trestle. After the large foundation pit is dug to the depth of 2 meters, the suspension trestle is suspended again, the excavator is adopted to dig 2 meters downwards, then the suspension trestle is placed again, and the large foundation pit can be guaranteed to be dug to the depth of 4 meters. After the large foundation pit is excavated to the depth of 4 meters, the trestle is suspended again, the excavator is adopted to descend again, then the suspension bridge is placed again, and the large foundation pit can be excavated to the depth of 6 meters.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the technical solutions, and although the present invention has been described in detail by referring to the preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions to the technical solutions of the present invention can be made without departing from the spirit and scope of the technical solutions, and all the modifications and equivalent substitutions should be covered by the claims of the present invention.
Claims (9)
1. A transfer bridge for transferring earthwork of a deep and large foundation pit is arranged on the earthwork outside a foundation pit (1), and is characterized by comprising a door frame (2), a ground beam (3), a suspension trestle (4) and a trestle lifting mechanism, wherein the door frame (2) is vertically arranged, the ground beam (3) and the suspension trestle (4) are respectively arranged at the front side and the rear side of the door frame (2), and the trestle lifting mechanism comprises at least one steel cable (5) fixedly connected with the suspension trestle (4); the utility model discloses a landing beam, including landing beam (3), landing beam (4), landing beam (5), landing beam (3) are fixed at door frame (2) lower extreme, are the level setting, suspend in midair landing stage (4) and rotationally install on door frame (2), transfer steel cable rope (5) through landing stage hoist mechanism's power device, can form earth and stone side transfer passage after landing stage (4) are transferred in midair, through pull-up steel cable rope (5), can be with suspending in midair the whole rising of one end that landing stage (4) and steel cable rope (5) are connected.
2. The transfer bridge for earthwork transfer of a deep and large foundation pit according to claim 1, wherein the power device of the trestle lifting mechanism is a hoist (6), one end of the steel cable (5) is fixed and wound on a winding drum of the hoist (6), the other end of the steel cable is fixed at the front end of the suspension trestle (4) after bypassing the top of the door frame (2), and a roller (24) for sliding the steel cable (5) is installed at the top of the door frame (2).
3. The transfer bridge for earth and stone square transfer of the deep and large foundation pit according to claim 2, wherein the door frame (2) is in a square shape and comprises upright columns (21) arranged left and right, a door frame beam (22) and a door ground beam (23) are fixed between the two upright columns (21), and the door frame beam (22) and the door ground beam (23) are arranged up and down.
4. The transfer bridge for the earth and stone square transfer of the deep and large foundation pit as claimed in claim 3, wherein the upper ends of the two upright posts (21) extend out of the portal frame beam (22), and the number of the rollers (24), the winch (6) and the steel cable (5) is two; two winches (6) are fixed on the left side and the right side of the ground beam (3), and two rollers (24) are respectively arranged on the extending ends of the two upright posts.
5. The transfer bridge for earthwork transfer of a deep and large foundation pit according to claim 2, wherein the hoist (6) is an electric hoist.
6. The transfer bridge for transporting the earth and stone square of the deep and large foundation pit as claimed in claim 2, wherein the ground beam (3) is frame-shaped, and the ground beam (3) is fixed on the ground through a screw or a counterweight (7).
7. The transfer bridge for the earth and stone square transfer of the deep and large foundation pit is characterized in that two reinforcing inclined struts (25) are arranged on one side, close to the ground beam (3), of the door frame (2), and two ends of each reinforcing inclined strut (25) are fixedly connected with the door frame and the ground beam (3) respectively.
8. The transfer bridge for earth and stone movement of a deep foundation pit according to any one of claims 1-7, wherein the suspension trestle (4) comprises a lower frame and an upper support plate, and two mounting rings (41) for fixing steel cables are arranged at the front end of the upper support plate.
9. A method for digging and transporting earth and stone in a deep and large foundation pit is characterized by comprising the following steps: s1, constructing the embedded piles at the periphery of the foundation pit according to design requirements, and marking an earth and rocky excavation area in the construction area; s2, assembling a transfer bridge on a platform outside an earth and rocky excavation area, wherein the transfer bridge comprises a door frame (2), a ground beam (3), a suspension trestle (4) and a trestle lifting mechanism, the door frame (2) is vertically arranged, the ground beam (3) and the suspension trestle (4) are respectively arranged on the front side and the rear side of the door frame (2), and the trestle lifting mechanism comprises at least one steel cable (5) fixedly connected with the suspension trestle (4); the ground beam (3) is fixed at the lower end of the door frame (2) and is horizontally arranged, and the suspension trestle (4) is rotatably arranged on the door frame (2); s3, fixing the ground beam (3) of the assembled transfer bridge on a platform outside the earth and rocky excavation area, and enabling the connecting end of the suspension trestle (4) of the transfer bridge to be completely positioned in the earth and rocky excavation area after being laid flat; s4, excavating earth and stone in an earth and stone excavation area, wherein during excavation, firstly excavating the part close to the transfer bridge, excavating the earth and stone at the position to the first-stage excavation depth of the foundation pit, then lowering the steel cable (5), and stopping lowering the steel cable (5) until the front end of the suspension trestle (4) contacts the earth and stone at the bottom, and at the moment, the suspension trestle (4) forms a channel for transporting the earth and stone; s5, continuing to excavate the remaining earthwork, transporting the earthwork while excavating until reaching the first-stage excavation depth of the foundation pit, pulling up the steel cable (5), turning the front end of the suspension trestle (4) to the upper side, and fixing the steel cable (5); and S6, repeating S4-S5 until the earth and stone excavation is finished.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010219484.4A CN111254807B (en) | 2020-03-25 | 2020-03-25 | Transfer bridge for transferring earthwork of deep and large foundation pit and earthwork excavating and transporting method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010219484.4A CN111254807B (en) | 2020-03-25 | 2020-03-25 | Transfer bridge for transferring earthwork of deep and large foundation pit and earthwork excavating and transporting method |
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| CN111254807A true CN111254807A (en) | 2020-06-09 |
| CN111254807B CN111254807B (en) | 2021-05-11 |
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| CN202010219484.4A Active CN111254807B (en) | 2020-03-25 | 2020-03-25 | Transfer bridge for transferring earthwork of deep and large foundation pit and earthwork excavating and transporting method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114808660A (en) * | 2022-03-31 | 2022-07-29 | 中国人民解放军92228部队 | Offshore self-propelled quick lap landing trestle device based on dynamic positioning |
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| KR200357935Y1 (en) * | 2004-05-19 | 2004-07-31 | 허양 | Pier |
| CN101294390A (en) * | 2007-04-27 | 2008-10-29 | 上海市第五建筑有限公司 | Support system and construction method for smoothening-digging partial center island foundation pit |
| CN201809719U (en) * | 2010-09-24 | 2011-04-27 | 邱定武 | Dual-use bridge for crossing flood and saving people |
| CN207498808U (en) * | 2017-10-20 | 2018-06-15 | 中国建筑第五工程局有限公司 | A kind of steel suspension bridge for deep-foundation pit engineering earthwork outward transport |
| CN108611961A (en) * | 2018-01-25 | 2018-10-02 | 中铁建设集团有限公司 | It is standardized to have enough to meet the need steel construction driving channel and its construction method |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4133067A (en) * | 1977-12-16 | 1979-01-09 | Bennett Ronald W | Articulating gangway |
| KR200357935Y1 (en) * | 2004-05-19 | 2004-07-31 | 허양 | Pier |
| CN101294390A (en) * | 2007-04-27 | 2008-10-29 | 上海市第五建筑有限公司 | Support system and construction method for smoothening-digging partial center island foundation pit |
| CN201809719U (en) * | 2010-09-24 | 2011-04-27 | 邱定武 | Dual-use bridge for crossing flood and saving people |
| CN207498808U (en) * | 2017-10-20 | 2018-06-15 | 中国建筑第五工程局有限公司 | A kind of steel suspension bridge for deep-foundation pit engineering earthwork outward transport |
| CN108611961A (en) * | 2018-01-25 | 2018-10-02 | 中铁建设集团有限公司 | It is standardized to have enough to meet the need steel construction driving channel and its construction method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114808660A (en) * | 2022-03-31 | 2022-07-29 | 中国人民解放军92228部队 | Offshore self-propelled quick lap landing trestle device based on dynamic positioning |
| CN114808660B (en) * | 2022-03-31 | 2023-10-27 | 中国人民解放军92228部队 | Near-shore self-propelled quick lap-joint trestle device based on dynamic positioning |
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| CN111254807B (en) | 2021-05-11 |
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