Novel double-row steel sheet pile cofferdam structure

Abstract

The utility model discloses a novel double-row steel sheet pile cofferdam structure, which is arranged along the width direction of a river channel and covers between a pair of river embankments, and comprises two rows of Larsen steel sheet pile groups which are arranged at intervals and are arranged in a mirror image manner, I-shaped steel is arranged between the two rows of Larsen steel sheet pile groups, and the two rows of Larsen steel sheet pile groups are connected into a whole by the I-shaped steel. The two ends of the I-shaped steel are fixed in a pair of river levees correspondingly, the Larsen steel sheet pile set close to water flow is an inner Larsen steel sheet pile set, the Larsen steel sheet pile set away from the water flow is an outer Larsen steel sheet pile set, and a plurality of second pile sets are arranged in an inner cavity of the Larsen steel sheet pile set between the inner Larsen steel sheet pile set and the I-shaped steel at intervals. A plurality of first pile sets are arranged in an inner cavity of the side, away from the I-shaped steel, of the outer Larsen steel sheet pile set at intervals, the first pile sets and the second pile sets are arranged in a staggered mode, and the bottom ends of the first pile sets and the bottom ends of the second pile sets are inserted into the foundation and used for supporting the Larsen steel sheet pile sets. The anti-water-flow-impact anti-seepage supporting structure has good water-flow-impact-resistant capacity, anti-seepage performance and supporting stability.

Description

TECHNICAL FIELD

[0001] The utility model relates to double row steel sheet pile cofferdam construction technical field, more specifically, the utility model relates to a novel double row steel sheet pile cofferdam structure. BACKGROUND

[0002] The structure type of cofferdam construction generally has two categories of earth and rock cofferdam and sheet pile cofferdam. The earth and rock cofferdam with huge volume is not ideal in stability, foundation bearing capacity and seepage prevention and water stop, and the construction period is very long. The steel sheet pile cofferdam has small volume and small influence range, can adopt double row sheet pile structure or lattice sheet pile structure, and has the advantages of strong stability, good water stop, convenient recycling and the like compared with the lattice steel sheet pile. Using the double row steel sheet pile cofferdam as the structure type of cofferdam construction, the cofferdam structure formed by splicing part of the Larsen steel sheet pile is arranged in the river channel and is used for blocking the river water to form a closed space. At this time, the cofferdam structure at the upstream position is subjected to the impact of the river water for a long time, which leads to the deformation and damage of the splicing position of the Larsen steel sheet pile due to the impact force of the river water. In severe cases, the cofferdam structure may leak, which seriously affects the construction progress. The deformation of the steel sheet pile is mainly caused by the insufficient support point and the long-time scouring of the river water. Therefore, how to set the connecting structure between the double row steel sheet pile cofferdams and enhance the stability of the steel sheet pile cofferdam structure has very important significance. SUMMARY

[0003] An object of the utility model is to provide a novel double row steel sheet pile cofferdam structure which has good water flow impact resistance, seepage resistance and support stability.

[0004] In order to solve the above technical problems, the utility model provides a novel double row steel sheet pile cofferdam structure, the cofferdam structure is arranged between a pair of river embankments along the width direction of the river channel and covers the two river embankments, and comprises two rows of Larsen steel sheet pile groups which are arranged at intervals and are mirror images of each other. An I-shaped steel is arranged between the two rows of Larsen steel sheet pile groups and connects the two rows of Larsen steel sheet pile groups to form a whole. The two ends of the I-shaped steel are fixed to the two river embankments respectively. The Larsen steel sheet pile group close to the water flow is an inner Larsen steel sheet pile group, and the Larsen steel sheet pile group far from the water flow is an outer Larsen steel sheet pile group. A plurality of pile groups two are arranged at intervals in the inner cavity of the inner Larsen steel sheet pile group between the inner Larsen steel sheet pile group and the I-shaped steel. A plurality of pile groups one are arranged at intervals in the inner cavity of the outer Larsen steel sheet pile group away from the I-shaped steel. The pile groups one and the pile groups two are arranged alternately and the bottom ends of the pile groups one and the pile groups two are inserted into the foundation for supporting the Larsen steel sheet pile groups.

[0005] Preferably, a plurality of vertical through openings are arranged at intervals along the width direction of the river channel at the top of the I-shaped steel, and a plurality of support piles are inserted into the openings one by one in a corresponding manner. The bottom ends of the support piles are inserted into the foundation, and the support piles all vertically pass through the center of the I-shaped steel.

[0006] Preferably, the pile group one and the pile group two are structurally identical and each include a pile base and a pair of steel piles in the pile base, the rear side of the pile base is attached to the Larsen steel sheet pile, and a pair of arc-shaped grooves are formed in the front side of the pile base, a pair of steel columns are clamped in the pair of arc-shaped grooves, and the bottom end of the pair of steel columns is inserted into the foundation to fix the entire pile group one or the pile group two.

[0007] Preferably, the flange plate of the I-beam is in contact with the inwardly recessed part of the side of the I-beam facing the Larsen steel sheet pile group, and a plurality of support assemblies are further arranged on the web of the I-beam and in contact with a corresponding one of the plurality of pile groups two.

[0008] Preferably, the support assembly includes a T-shaped sliding seat, a clamping seat, and a driving mechanism arranged in the clamping seat, the sliding seat is slidingly connected to the clamping seat, the driving mechanism includes a rotating rod, a worm connected to the rotating rod, a worm gear meshing with the worm, and a threaded rod connected to the center of the worm gear, the rotating rod is driven to rotate, one end of the threaded rod is fixedly connected to the center of the worm gear, and the other end is threadedly connected to the center of the sliding seat, a threaded channel is arranged in the center of the sliding seat, the sliding seat is in contact with the pile group two, and the clamping seat is connected to the I-beam.

[0009] Preferably, the clamping seat is fixedly connected to a connecting seat on the other side of the connecting sliding seat, sliding blocks are arranged on the upper and lower surfaces of the connecting seat, and a pair of sliding grooves are oppositely arranged on a pair of flange plates of the I-beam.

[0010] Preferably, each row of Larsen steel sheet pile groups is formed by splicing a plurality of Larsen steel sheet piles, adjacent Larsen steel sheet piles are clamped and connected as a whole through the bending portions on the two sides, the bending portions on the two sides of the Larsen steel sheet pile are provided with sealing strips, and the sealing strips at the positions of the bending portions are in interference abutment after clamping.

[0011] The utility model at least includes following beneficial effect:

[0012] 1、 the utility model discloses a pile group, I-beam and support assembly are set up, and the support of auxiliary steel sheet pile is convenient, the support performance of Larsen steel sheet pile is improved, and then the performance of Larsen steel sheet pile's water flow impact resistance and the stability of steel sheet pile are improved, the splicing position of Larsen steel sheet pile is deformed and damaged easily due to the impact of river water, and the serious situation that the cofferdam structure leaks water is avoided as far as possible.

[0013] 2、 the utility model discloses that the bending portion of Larsen steel sheet pile two sides is provided with sealing strip, and the Larsen steel sheet pile between adjacent is clamped through bending portion, and the sealing strip between the position of bending portion is in interference abutment after clamping, and the clearance between adjacent Larsen steel sheet pile is sealed, realizes waterproof tightness.

[0014] Other advantages, objects and features of the present application will be apparent from the following detailed description of the application, taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a schematic diagram of the overall structure of the present application;

[0016] Figure 2 is a schematic diagram of the structure of the present application H-shaped steel, support assembly and pile group two cooperation;

[0017] Figure 3 is a schematic diagram of the support assembly of the present application;

[0018] Figure 4 is a schematic diagram of the structure of the present application pile group one and pile group two;

[0019] Figure 5 is a schematic diagram of the structure of the present application Larsen steel sheet pile group.

[0020] BRIEF DESCRIPTION OF DRAWINGS

[0021] 1, the embankment, 2, Larsen steel sheet pile, 3, H-shaped steel, 4, support pile, 5, pile group one, 6, pile group two, 7, support assembly, 71, sliding seat, 72, threaded rod, 73, clamping seat, 74, worm, 75, worm, 76, rotating rod, 77, connecting seat, 78, sliding block, 8, pile, 9, steel pile. DETAILED DESCRIPTION

[0022] In order to better understand the purpose, structure and function of the present application, the present application will be further described in detail below in conjunction with the drawings, so that those skilled in the art can implement it according to the description.

[0023] It should be noted that in the description of the present application, the terms "transverse", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation of the present application.

[0024] As Figures 1 to 5As shown in the utility model provides a novel double row steel sheet pile cofferdam structure, cofferdam structure sets up in along river width direction and covers between a pair of river embankment 1, including two rows of Larsen steel sheet pile 2 group that interval arrangement, it is mirror image setting, two rows of Larsen steel sheet pile 2 group between the setting has I-steel 3, it will two rows of Larsen steel sheet pile 2 group connection form whole, the both ends of I-steel 3 are fixed in a pair of river embankment 1 respectively, the Larsen steel sheet pile 2 group close to water flow is inner Larsen steel sheet pile 2 group, and the Larsen steel sheet pile 2 group far from water flow is outer Larsen steel sheet pile 2 group, and the inner cavity of Larsen steel sheet pile 2 group between inner Larsen steel sheet pile 2 group and I-steel 3 is interval arranged with multiple pile groups two 6, and the inner cavity of Larsen steel sheet pile 2 group far from I-steel 3 of outer Larsen steel sheet pile 2 group side is interval arranged with multiple pile groups one 5, the pile group one 5 and pile group two 6 are mutually staggered and set up and all insert into the ground for supporting Larsen steel sheet pile 2 group with bottom end.

[0025] Double-layer cofferdam structure is connected by two rows of Larsen steel sheet pile 2 group along river width direction setting, and each row of Larsen steel sheet pile 2 group is formed by splicing multiple Larsen steel sheet piles 2, and two rows of Larsen steel sheet pile 2 group are mirror image setting, and I-steel 3 is arranged between two rows of Larsen steel sheet pile 2 group, and two rows of Larsen steel sheet pile 2 group are connected to form a whole by I-steel 3, so that two rows of Larsen steel sheet pile 2 group can support each other, which greatly improves the impact resistance of the double-layer cofferdam structure composed of Larsen steel sheet pile 2 group and increases the stability of the cofferdam structure.

[0026] Each Larsen steel sheet pile 2 inner cavity is provided with a pipe pile, and the pipe pile is divided into pile groups two 6 between two rows of Larsen steel sheet pile 2 group and pile groups one 5 on the side far from two rows of Larsen steel sheet pile 2 group. The Larsen steel sheet pile 2 group close to water flow is inner Larsen steel sheet pile 2 group, and the Larsen steel sheet pile 2 group far from water flow is outer Larsen steel sheet pile 2 group, and the inner cavity between inner Larsen steel sheet pile 2 group and I-steel 3 is interval arranged with multiple pile groups two 6, and the inner cavity of Larsen steel sheet pile 2 group far from I-steel 3 of outer Larsen steel sheet pile 2 group side is interval arranged with multiple pile groups one 5, the pile group one 5 and pile group two 6 are mutually staggered and set up, and each Larsen steel sheet pile 2 is provided with pile group one 5 or pile group two 6, and pile group two 6 and pile group one 5 are closely combined with the corresponding Larsen steel sheet pile 2, for supporting Larsen steel sheet pile 2, improving the performance of Larsen steel sheet pile 2 against water flow impact, and supporting the connection of Larsen steel sheet pile 2 by pile group two 6 and pile group one 5, to avoid the deformation of Larsen steel sheet pile 2 at the water-impingement position due to impact when river water impacts.

[0027] In another technical solution, as shown in the utility model, Figure 2 The top of I-steel 3 is interval arranged with multiple vertical through openings along river width direction, and multiple support piles 4 are inserted into the openings one by one, the bottom end of the support pile 4 is inserted into the foundation, and the support pile 4 vertically passes through the center of I-steel 3.

[0028] The I-shaped steel 3 is provided with a plurality of rectangular openings arranged at equal intervals on the outer wall of the top thereof, and a support pile 4 is inserted into each of the rectangular openings. The I-shaped steel 3 is fixed in the river embankment 1, and the bottom end of the support pile 4 is inserted into the ground to improve the stability of the I-shaped steel 3.

[0029] In another technical solution, as shown in Figure 4 the pile group one 5 and the pile group two 6 are structurally identical and each include a pile base 8 and a pair of steel piles 9 arranged in the pile base 8. The rear side of the pile base 8 is attached to the Larsen steel sheet pile 2, and a pair of arc-shaped grooves are arranged on the front side of the pile base 8. A pair of steel columns are clamped in the pair of arc-shaped grooves, and the bottom end of the pair of steel columns is inserted into the ground to fix the entire pile group one 5 or the pile group two 6.

[0030] The pile group one 5 and the pile group two 6 are structurally identical and mainly include two steel piles 9 and a pile base 8. One side of the pile base 8 is attached to the Larsen steel sheet pile 2, and two arc-shaped grooves are arranged on the other side of the pile base 8. The two steel piles 9 are clamped in the arc-shaped grooves to facilitate the fixation of the pile base 8 on the steel piles 9. The pile group two 6 and the pile group one 5 are inserted into the ground to protect the connection of the Larsen steel sheet pile 2. Meanwhile, the plurality of pile group one 5 and the pile group two 6 cooperate with the I-shaped steel 3 and the support assembly 7 to effectively support the Larsen steel sheet pile 2, thereby greatly improving the impact resistance of the splicing position of the Larsen steel sheet pile 2.

[0031] In another technical solution, as shown in Figure 2 the flange plate of the I-shaped steel 3 is in contact with the inwardly recessed portion of the inner Larsen steel sheet pile 2 group facing the I-shaped steel 3. A plurality of support assemblies 7 are arranged on the web of the I-shaped steel 3 and are in one-to-one contact with the plurality of pile group two 6.

[0032] The I-shaped steel 3 is provided with a plurality of support assemblies 7, which can assist the inner Larsen steel sheet pile 2 group in supporting. The I-shaped steel 3 directly contacts the recessed portion of the inner Larsen steel sheet pile 2, and the support assembly 7 mainly contacts the protruding portion of the inner Larsen steel sheet pile 2, thereby effectively supporting the Larsen steel sheet pile 2 group. The cooperation between the I-shaped steel 3, the support assembly 7, the pile group one 5, and the pile group two 6 improves the integrity of the two Larsen steel sheet pile 2 groups, effectively supports the Larsen steel sheet pile 2, and thus effectively avoids the problem of local deformation of the Larsen steel sheet pile 2.

[0033] In another technical solution, as shown in Figure 3As shown, the support assembly 7 includes a sliding seat 71 with a T-shaped cross section, a clamping seat 73, and a driving mechanism arranged in the clamping seat. The sliding seat is slidingly connected to the clamping seat. The driving mechanism includes a rotating rod 76, a worm 75 connected to the rotating rod, a worm gear 74 engaged with the worm, and a threaded rod 72 connected to the center of the worm gear. The rotating rod is driven to rotate. One end of the threaded rod is fixedly connected to the center of the worm gear, and the other end is threadedly connected to the center of the sliding seat. A threaded channel is arranged in the center of the sliding seat. The sliding seat is in close contact with the pile group two 6. The clamping seat is connected to the I-beam 3. The other side of the clamping seat connected to the sliding seat is fixedly connected with a connecting seat 77. The upper and lower surfaces of the connecting seat 77 are provided with sliding blocks 78. A pair of flange plates of the I-beam 3 are provided with a pair of sliding grooves in opposition. The upper and lower sliding blocks are slidingly connected to the pair of sliding grooves.

[0034] The support assembly 7 mainly includes a clamping seat and a sliding seat. The sliding seat has a T-shaped cross section. One end of the sliding seat is in contact with the pile seat 8. A driving mechanism is arranged in the clamping seat. The driving mechanism can directly adjust the position of the sliding seat, thereby facilitating effective support of the Larsen steel sheet pile 2. The driving mechanism includes a threaded rod rotatingly installed in the clamping seat. The sliding seat is screwed on the outer wall of the threaded rod. One end of the threaded rod is fixedly connected with a worm gear. The inner wall of the clamping seat is rotatingly connected with a worm. The worm is engaged with the worm gear. The inner wall of the clamping seat is rotatingly installed with a rotating rod penetrating through the clamping seat. One end of the rotating rod is connected with the worm. Meanwhile, the support assembly 7 is relatively independent and can adjust the position of the sliding seat according to actual conditions. A clamping mechanism is arranged on the clamping seat. The arrangement of the clamping mechanism facilitates clamping of the support assembly 7 in the groove of the I-beam 3, thereby facilitating disassembly of the support assembly 7. The clamping mechanism includes a connecting seat. Sliding blocks are installed on the outer walls of the two sides of the connecting seat. The inner walls of the two sides of the I-beam 3 are provided with sliding grooves matched with the sliding blocks. During installation, the support assembly 7 is slid from the end of the sliding groove to between the I-beams 3. During disassembly, the support assembly 7 is slid from between the I-beams 3 to the end of the sliding groove. The rotation of the rotating rod can be driven by a micro motor or other feasible driving mechanisms.

[0035] The adjustable support assembly 7 can adjust the support effect of the support assembly 7 according to actual conditions, effectively avoiding deformation and damage of the splicing position of the Larsen steel sheet pile due to the impact force of river water. In severe cases, it may cause leakage of the cofferdam structure, which seriously affects the construction progress.

[0036] In another technical solution, as shown in Figure 5 Each row of Larsen steel sheet piles 2 is formed by splicing a plurality of Larsen steel sheet piles 2. Adjacent Larsen steel sheet piles 2 are connected as a whole by the clamping connection of the two side bending portions. The two side bending portions of the Larsen steel sheet pile 2 are provided with sealing strips. After clamping, the sealing strips at the positions of the bending portions are in interference abutment.

[0037] The connecting structure is a connecting part for mutual clamping formed by bending two sides of the Larsen steel sheet pile 2, and adjacent Larsen steel sheet piles 2 are clamped with each other through the connecting part, so that the Larsen steel sheet pile 2 is convenient to install and disassemble, the construction efficiency is greatly improved, and the Larsen steel sheet pile 2 is convenient to recycle and reuse, and resources are greatly saved.

[0038] The waterproof structure comprises a sealing strip arranged at the connecting part position of the Larsen steel sheet pile 2, and when the adjacent Larsen steel sheet piles 2 are clamped through the bending part, the sealing strips at the bending part position are in interference abutment, so that the sealing property of the connecting position of the Larsen steel sheet pile 2 is greatly improved, and the river water is prevented from seeping through the small gap at the connecting position of the two adjacent Larsen steel sheets.

[0039] It can be understood that the utility model is described through some embodiments, and the person skilled in the art knows that various changes or equivalent replacements can be made to these features and embodiments without departing from the spirit and scope of the utility model. Although the embodiments of the utility model have been disclosed as above, it is not limited to the application listed in the specification and the embodiments, and it can be fully applied to various fields suitable for the utility model, and another modification can be easily realized by the person skilled in the art, so that the utility model is not limited to specific details and the drawings shown and described without departing from the general concept defined by the claims and equivalent range.

Claims

1. A new double-row steel sheet pile cofferdam structure, characterized in that, The cofferdam structure is arranged along the river width direction and covers between a pair of river embankments, comprising two rows of Larsen steel sheet pile groups arranged at intervals, which are mirror images, a steel I-beam is arranged between the two rows of Larsen steel sheet pile groups, which connects the two rows of Larsen steel sheet pile groups to form a whole, both ends of the steel I-beam are fixed in a pair of river embankments, the Larsen steel sheet pile group close to the water flow is the inner Larsen steel sheet pile group, and the Larsen steel sheet pile group far away from the water flow is the outer Larsen steel sheet pile group, a plurality of pile groups two are arranged at intervals in the inner cavity of the Larsen steel sheet pile group between the inner Larsen steel sheet pile group and the steel I-beam, a plurality of pile groups one are arranged at intervals in the inner cavity of the Larsen steel sheet pile group far away from the steel I-beam of the outer Larsen steel sheet pile group, the pile groups one and the pile groups two are arranged alternately and the bottom ends are inserted into the foundation to support the Larsen steel sheet pile group.

2. The new type double-row steel sheet pile cofferdam structure according to claim 1, characterized in that, A plurality of vertical through openings are arranged at intervals on the top of the steel I-beam along the river width direction, and a plurality of supporting piles are correspondingly inserted into the openings, the bottom ends of the supporting piles are inserted into the foundation, and the supporting piles vertically pass through the center of the steel I-beam.

3. The new type double-row steel sheet pile cofferdam structure according to claim 1, characterized in that, The pile group one and the pile group two are the same structure and each comprise a pile base and a pair of steel piles in the pile base, the rear side of the pile base is attached to the Larsen steel sheet pile, and a pair of arc-shaped grooves are formed in the front side, a pair of steel columns are clamped in the arc-shaped grooves, and the bottom ends of the steel columns are inserted into the foundation to fix the whole pile group one or pile group two.

4. The new type double-row steel sheet pile cofferdam structure according to claim 1, characterized in that, Each row of Larsen steel sheet pile groups is formed by splicing a plurality of Larsen steel sheet piles, adjacent Larsen steel sheet piles are clamped and connected into a whole through the bending parts on both sides, the bending parts on both sides of the Larsen steel sheet pile are provided with sealing strips, and the sealing strips at the position of the bending parts are in interference abutment after clamping.

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