A base anchoring structure for a floating navigation wall mooring post

Abstract

The utility model provides a kind of base anchoring structure for floating navigation wall mooring column, including float, and the top edge portion of float deck of float is anchored and installed with mooring column base by multiple anchor bolts, and the top of mooring column base is fixedly installed mooring column, and the mooring column base plate of mooring column base is provided with pedestal, and anchor rod is limit installed on pedestal, and the other end of anchor rod is connected with pin shaft clamping plate hinged after sequentially passing through mooring column base plate, float deck and bottom bracing plate, and pin shaft clamping plate is anchored and set in the top of anchoring block, and anchoring block is anchored and connected with the inner bottom of float. On the basis of not affecting the function and safety of float, by simply transforming float structure, increase mooring column base anchoring structure, realize the purpose of increasing height of floating navigation wall mooring column.

Description

Technical Field

[0001] This utility model belongs to the field of ship lock facility renovation in water transport engineering, specifically a base anchoring structure for a floating navigation wall mooring bollard. Background Technology

[0002] In my country's inland waterways where water levels fluctuate significantly, floating navigation walls are commonly used as hydraulic engineering facilities to guide vessels smoothly into locks. A floating navigation wall consists of multiple pontoon units, supports, guide rails, and connectors, enabling it to automatically rise and fall with changes in water level. See also Figure 1 The existing pontoon structure has fixed bollards installed on top of the pontoon deck. These bollards are generally 30 to 40 centimeters higher than the pontoon deck and are used for temporary mooring of ships at the navigation wall or for waiting to be moored at the lock. With the continuous improvement of domestic waterway conditions and the prosperity and development of the economy and society, there is a clear trend towards larger ships passing through the lock, especially high-freeboard ships. When unloaded, the ship deck is quite high above the water surface. The original design and construction of the bollards are too low, making it inconvenient and time-consuming to moor and unmoor, which to some extent affects the navigation efficiency of the lock. At the same time, mooring and unmooring under such a large elevation difference poses certain safety risks to the crew. Therefore, it is urgent to modify the original bollards, raising and enlarging them to improve the mooring conditions at the navigation wall.

[0003] Because the original design and construction of the pontoon unit was a reinforced concrete hollow box structure, the thickness of the entire pontoon box wall, bulkhead and deck was relatively thin. Only the thickness of the above-water part of the ship's side plate was increased, but the thickness was limited. The increased height and size of the mooring bollard and its base made the pontoon unable to meet the conditions for anchoring the base to the side plate and deck. Utility Model Content

[0004] To address current technical problems, this invention aims to provide a base anchoring structure for the bollard of a floating navigation wall. Without affecting the function and safety of the pontoon, it achieves the goal of increasing the height and size of the bollard by simply modifying the pontoon structure and adding a bollard base anchoring structure. This invention utilizes the force transmission of the anchor rod while fully leveraging the thickness of the pontoon's hull plate to provide a practical bollard base anchoring structure. This solves the problem that the increased size of the bollard and its base after the increase in height and size makes it difficult for the pontoon to anchor the base to the hull plate and deck.

[0005] To achieve the above-mentioned technical features, the purpose of this utility model is as follows: A base anchoring structure for a bollard of a floating navigation wall includes a pontoon. A bollard base is anchored to the top edge of the pontoon deck of the pontoon by multiple anchor bolts. A bollard is fixedly installed on the top of the bollard base. A platform is provided on the bollard base plate of the bollard base. An anchor rod is installed at the upper limit of the platform. The other end of the anchor rod passes through the bollard base plate, the pontoon deck and the bottom support plate in sequence and is hinged to a pin clamping plate. The pin clamping plate is anchored at the top of the anchoring block. The anchoring block is anchored to the inner bottom of the pontoon.

[0006] Preferably, the pontoon includes a pontoon bottom plate and a pontoon deck, with pontoon longitudinal and transverse bulkheads provided between the pontoon bottom plate and the pontoon deck, and pontoon longitudinal ribs provided on the pontoon bottom plate; rubber fenders are fixed on the outer wall of the pontoon and the side wall in contact with the ship, and pontoon side plates are provided on both sides of the pontoon.

[0007] Preferably, the bollard base includes a bollard base plate, a box-shaped upright plate is fixed to the top of the bollard base plate, a box-shaped inner plate is fixed between the box-shaped upright plates, a top plate is fixed to the top of the box-shaped upright plates and the box-shaped inner plate, the bollard is fixed to the top of the top plate by bolts, a reinforcing plate is provided between the box-shaped upright plates and the bollard base plate, a first waist-shaped hole for the anchor rod to pass through is machined on the bollard base plate, and a limiting plate for limiting the platform is fixed on the bollard base plate.

[0008] Preferably, the anchoring bolts are anchoring chemical bolts, and there are 7 anchoring bolts arranged in 4 rows parallel to the water flow direction. The first row has 3 bolts, the second row has 2 bolts, the third row has 1 bolt, and the fourth row has 1 bolt. The anchoring bolts in the first and second rows are fixed to the pontoon hull plate, and the bolts in the third and fourth rows are fixed to the pontoon diaphragm.

[0009] Preferably, the bottom support plate includes a diagonal support plate, and diagonal support fixing plates are fixed at both ends of the diagonal support plate. The diagonal support fixing plates are fixedly connected to the inner sidewalls of the pontoon hull plate and the pontoon deck by connecting bolts.

[0010] Preferably, the inclined brace fixing plate that mates with the pontoon deck is machined with a second oblong hole for passing through the anchor bolt.

[0011] Preferably, the top end of the anchor rod is fixed to the base bearing plate of the pedestal by multiple fastening nuts, the base bearing plate adopts a sloping structure, and the bottom end of the anchor rod is hinged to the pin clamping plate by a pin.

[0012] The pin-shaped base plate has a welded hook that connects to the internal steel reinforcement of the anchor block.

[0013] Preferably, a counterweight block is provided on the bottom plate of the pontoon and on the side of the anchor block;

[0014] The anchor blocks and counterweights are cast-in-place reinforced concrete structures. They are connected to the pontoon's longitudinal diaphragms, transverse diaphragms, and longitudinal ribs by adding reinforcing bars. The added reinforcing bars are also connected and tied to the reinforcing bars in the pontoon's longitudinal diaphragms, transverse diaphragms, and longitudinal ribs. After casting, the anchor blocks and counterweights form an integral whole with the pontoon's concrete structure, so that the whole structure shares the load.

[0015] Preferably, the connecting bolts are chemical bolts and are implanted into the pontoon sideplate and pontoon deck to fix the diagonal brace fixing plate.

[0016] The present invention has the following beneficial effects:

[0017] 1. This utility model makes full use of the force transmission of the anchor bolt, solves the problem that the thickness of the pontoon deck is insufficient and the bollard base cannot be anchored, and provides a simple and feasible anchoring structure for the bollard base after being heightened and enlarged.

[0018] 2. This utility model utilizes the method of pre-tensioning the anchor bolt by tightening the nut, so that the anchor bolt is pre-stressed. When the mooring bollard is subjected to the tension of the ship, it can transfer the tension to the anchor block in a timely and effective manner, thereby transferring it to the entire pontoon structure, effectively protecting the relatively thin pontoon deck from tensile damage.

[0019] 3. This utility model utilizes a bottom support plate installed below the part of the pontoon deck that is subjected to greater stress, which effectively transmits the pressure from the prestressed anchor bolts to the pontoon deck. The pressure is then transferred through the bottom support plate to the thicker side plate, effectively protecting the pontoon deck from pressure damage. Through the combined action of the anchor bolts and the bottom support plate, the load on the pontoon deck is reduced, thus avoiding deck damage.

[0020] 4. This utility model utilizes reinforcing bars to connect the anchor blocks and balancing blocks with the longitudinal and transverse partitions of the pontoon to form a whole, and arranges them symmetrically so that the pontoon shares the force and keeps the original center of gravity of the pontoon basically unchanged. This greatly reduces the volume of the anchor blocks and balancing blocks, reduces the impact of the significant increase in weight caused by adding anchor blocks and balancing blocks, and limits the increase in weight to a certain range without affecting the overall function and structural safety of the pontoon. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Figure 1 This is a schematic diagram of the original design for the floating box structure.

[0023] Figure 2 This is a schematic diagram of the pontoon structure after the addition of mooring bollards and anchoring structures.

[0024] Figure 3 for Figure 2Enlarged view of a portion of the image.

[0025] Figure 4 This is a front view of the pontoon after the bollard has been heightened and enlarged.

[0026] Figure 5 This is a schematic diagram showing the connection positions of the seven bolts on the bollard base to the buoy box.

[0027] Figure 6 for Figure 5 AA view.

[0028] Figure 7 for Figure 5 BB view.

[0029] Figure 8 This is a partial structural diagram of the mooring bollard base connection area after removing the pedestal and deck.

[0030] In the diagram: 1. Float box; 2. Mooring bollard; 3. Mooring bollard base; 4. Anchor bolt; 5. Platform; 6. Anchor rod; 7. Bottom support plate; 8. Pin clamp plate; 9. Anchor block; 10. Counterweight block.

[0031] 101 Rubber fender, 102 Original mooring bollard, 103 Float box hull plate, 104 Float box deck, 105 Float box longitudinal bulkhead, 106 Float box transverse bulkhead, 107 Float box longitudinal rib, 108 Float box bottom plate.

[0032] Mooring bollard base plate 301, first oblong hole 302, limiting plate 303, box-shaped inner plate 305, reinforcing plate 306, top plate 307;

[0033] 501 bearing plate for pedestal;

[0034] Fastening nut 601, pin 602;

[0035] Connecting bolt 701, diagonal brace fixing plate 702, diagonal brace plate 703. Detailed Implementation

[0036] The embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0037] Example 1:

[0038] See Figure 1-8An anchoring structure for the base of a bollard for a floating navigation wall includes a pontoon 1. A bollard base 3 is anchored to the top edge of the pontoon deck 104 of the pontoon 1 by multiple anchor bolts 4. A bollard 2 is fixedly installed on the top of the bollard base 3. A platform 5 is provided on the bollard base plate 301 of the bollard base 3. An anchor rod 6 is installed at the upper limit of the platform 5. The other end of the anchor rod 6 is hinged to a pin plate 8 after passing through the bollard base plate 301, the pontoon deck 104 and the bottom support plate 7 in sequence. The pin plate 8 is anchored at the top of an anchor block 9. The anchor block 9 is anchored to the inner bottom of the pontoon 1. By using the aforementioned base anchoring structure without affecting the function and safety of the pontoon, and through simple modifications to the pontoon structure, a bollard base anchoring structure is added, achieving the goal of increasing the height and size of the bollard for the floating navigation wall. This utility model utilizes the force transmission of the anchor rod while making full use of the relatively thick pontoon hull plate, providing a practical bollard base anchoring structure. It solves the problem that the increased height and size of the bollard and its base make it too large, and the pontoon cannot meet the requirement of anchoring the base to the hull plate and deck.

[0039] Through the above structure, on the one hand, the bollard base 3 is connected to the anchor block 9 via an anchor bolt. By pre-tensioning the anchor bolt, the anchor bolt is pre-stressed, ensuring that the ship's tension on the bollard is transferred to the anchor block in a timely and effective manner. On the other hand, the base is fixed to the pontoon's hull plate and transverse bulkhead via vertically inserted long screws, transferring part of the load to the entire pontoon structure through the pontoon's hull plate and transverse bulkhead.

[0040] Each mooring bollard base corresponds to two anchor blocks and two balancing blocks. The anchor blocks and balancing blocks are symmetrical about the longitudinal bulkhead of the pontoon, and the anchor blocks and balancing blocks are symmetrical about the transverse bulkhead of the pontoon, thus ensuring that the weight distribution of the pontoon is uniform and that it remains balanced.

[0041] Further, the pontoon 1 includes a pontoon bottom plate 108 and a pontoon deck 104, with a pontoon longitudinal bulkhead 105 and a pontoon transverse bulkhead 106 disposed between the pontoon bottom plate 108 and the pontoon deck 104. Pontoon longitudinal ribs 107 are provided on the pontoon bottom plate 108. Rubber fenders 101 are fixed to the outer wall of the pontoon 1 and the side wall in contact with the ship. Pontoon hull plates 103 are provided on both sides of the pontoon 1. Through the above-described pontoon 1...

[0042] Furthermore, the bollard base 3 includes a bollard base plate 301, a box-shaped vertical plate 304 fixed to the top of the bollard base plate 301, a box-shaped inner plate 305 fixed between the box-shaped vertical plates 304, a top plate 307 fixed to the top of the box-shaped vertical plates 304 and the box-shaped inner plate 305, a bollard 2 fixed to the top of the top plate 307 by bolts, a reinforcing plate 306 provided between the box-shaped vertical plates 304 and the bollard base plate 301, a first oblong hole 302 for passing through the anchor rod 6 machined on the bollard base plate 301, and a limiting plate 303 for limiting the platform 5 fixed on the bollard base plate 301. The bollard base 3 is positioned near the intersection of the pontoon hull plate and the transverse bulkhead. The base is fixed to the pontoon concrete structure by two force-transmitting components: on the one hand, the base is fixed to the pontoon hull plate and transverse bulkhead by a long screw inserted vertically downwards; on the other hand, the base is connected to the anchor block by an anchor rod.

[0043] Furthermore, the anchor bolts 4 are anchoring chemical bolts, and there are 7 anchor bolts in total, arranged in 4 rows parallel to the water flow direction. The first row has 3 bolts, the second row has 2 bolts, the third row has 1 bolt, and the fourth row has 1 bolt. The anchor bolts in the first and second rows are fixed to the pontoon side plate 103, and the bolts in the third and fourth rows are fixed to the pontoon transverse bulkhead 106. The above-mentioned arrangement of chemical bolts ensures the strength and stability of the fixed installation.

[0044] Furthermore, the bottom support plate 7 includes a diagonal support plate 703, with diagonal support fixing plates 702 fixed at both ends of the diagonal support plate 703. The diagonal support fixing plates 702 are fixedly connected to the inner sidewalls of the pontoon hull plate 103 and the pontoon deck 104 via connecting bolts 701. The bottom support plate 7 is located at the angle between the pontoon hull plate 103 and the pontoon deck 104, and below the mooring bollard base 3. It is fixed to the concrete structure of the pontoon hull plate 103 and the deck 104 by implanting chemical bolts. The main problem it solves is that after the anchor bolts are tensioned, the load is transferred to the pontoon deck, which is under pressure. By setting the bottom support plate, the pressure load on the pontoon deck can be transferred to the thicker pontoon hull plate, thereby protecting the pontoon deck from pressure damage.

[0045] Furthermore, the inclined brace fixing plate 702 that mates with the pontoon deck 104 is machined with a second oblong hole 704, which is used to pass through the anchor bolt 6. The second oblong hole 704 facilitates fine-tuning of the position of the anchor bolt 6 during subsequent tensioning.

[0046] Furthermore, the top end of the anchor bolt 6 is fixed to the base bearing plate 501 of the base 5 by multiple fastening nuts 601. The base bearing plate 501 adopts a sloping structure. The bottom end of the anchor bolt 6 is hinged to the pin clamping plate 8 by a pin 602. The upper end of the anchor bolt 6 is threaded. During installation, multiple fastening nuts 601 are tightened to pre-tension the anchor bolt, so that the anchor bolt is subjected to tension in advance. This allows the ship's tension on the mooring bollard to be transferred to the anchor block in a timely and effective manner, preventing the concrete of the pontoon deck from cracking under the action of ship tension. Each mooring bollard base is equipped with two diagonal anchor bolts, which are symmetrically arranged about the transverse bulkhead.

[0047] Furthermore, the base of the pin clamping plate 8 is welded with hooks that connect to the internal reinforcing bars of the anchor block 9. This ensures the fixed installation strength and stability of the pin clamping plate 8.

[0048] Furthermore, a counterweight block 10 is provided on the bottom plate 108 of the pontoon and on the side of the anchor block 9; the anchor block 9 and the counterweight block 10 are cast-in-place reinforced concrete structures, which are connected to the pontoon longitudinal diaphragm 105, pontoon transverse diaphragm 106 and pontoon longitudinal rib 107 of the pontoon 1 by adding reinforcing bars, and the added reinforcing bars are connected and tied to the reinforcing bars in the pontoon longitudinal diaphragm 105, pontoon transverse diaphragm 106 and pontoon longitudinal rib 107. After casting, the anchor block 9 and the counterweight block 10 form an integral whole with the concrete structure of the pontoon 1, so that the whole is subjected to the same force.

[0049] The anchoring blocks and balancing blocks are reinforced concrete structures. During construction, holes are first drilled in parts of the longitudinal and transverse diaphragms and longitudinal beams of the pontoon. The anchoring blocks and balancing blocks are connected to the longitudinal and transverse diaphragms and longitudinal beams of the pontoon by reinforcing bars passing through the holes. Additional reinforcing bars are connected and tied to the reinforcing bars in the longitudinal and transverse diaphragms and longitudinal ribs. After pouring, the anchoring blocks, balancing blocks, and pontoon concrete structure form a whole, allowing the whole to share the load. Each mooring bollard base corresponds to two anchoring blocks and two balancing blocks. The anchoring blocks and balancing blocks are symmetrical about the longitudinal diaphragms of the pontoon, and the anchoring blocks and balancing blocks are symmetrical about the transverse diaphragms of the pontoon, thus ensuring uniform weight distribution and balance of the pontoon.

[0050] Furthermore, the connecting bolts 701 are chemical bolts and are implanted into the pontoon side plate 103 and the pontoon deck 104 to fix the diagonal brace fixing plate 702.

[0051] Example 2:

[0052] Another aspect of this utility model provides a construction method for the base anchoring structure of a floating navigation wall bollard, comprising the following steps:

[0053] S1: Positioning and opening:

[0054] Accurately locate the parts that need to be drilled, and then drill holes in the pontoon deck 104, pontoon longitudinal bulkhead 105, pontoon transverse bulkhead 106, pontoon longitudinal rib 107, bottom support plate 7, platform 5, and bollard base 3.

[0055] S2: Implantation of chemical anchor bolts:

[0056] Clean and dry some of the holes on the pontoon side plate 103, pontoon transverse bulkhead 106, and pontoon deck 104, inject chemical anchoring adhesive, and implant anchor bolts 4.

[0057] S3: Binding of reinforcing mesh and connection of reinforcing bars:

[0058] Reinforcing bars are tied and dowel bars are installed on anchor blocks 9 and leveling blocks 10. The dowel bars pass through the pontoon longitudinal diaphragm 105 and pontoon transverse diaphragm 106, and are inserted into the pontoon longitudinal rib 107. The concrete at the junction of the pontoon longitudinal diaphragm 105, pontoon transverse diaphragm 106 and pontoon longitudinal rib 107 with the dowel bars is appropriately removed. The dowel bars are then tied firmly to the reinforcing bars in the original structure. At the same time, the pin clamp plate 8 is pre-embedded in the reinforcing mesh, and the hook of the pin clamp plate 8 is tied firmly to the reinforcing mesh.

[0059] S4: Concrete pouring using vertical formwork:

[0060] After the steel mesh is tied, formwork is erected around anchor block 9 and leveling block 10, concrete is poured and cured.

[0061] S5: Installation of bollard base 3 and bollard 2:

[0062] Install the assembled bollard base 3 and bollard 2 in the predetermined position. Use anchor bolts 4 to fix the base to the pontoon side plate 103, pontoon transverse bulkhead 106 and pontoon deck 104. Tighten the connecting bolts between bollard 2 and bollard base 3. Fill the bollard 2 slot with concrete.

[0063] S6: Installation of base support plate 7:

[0064] The bottom support plate 7 is connected and fixed to the pontoon side plate 103 and the pontoon deck 104 using chemical bolts;

[0065] S7: Installation of anchor bolt 6 and base 5:

[0066] The platform 5 is installed on the bollard base 3. The lower end of the anchor rod 6 is connected and fixed to the pin plate 8, and the upper end passes through the bottom support plate 7, the pontoon deck 104, the bollard base 3, the platform 5, and the platform bearing plate 501 on the surface of the platform in sequence.

[0067] S8: Tensioning of anchor bolt 6:

[0068] Multiple fastening nuts 601 are used to tighten the anchor rod 6, so that the anchor rod 6 is pre-stressed.

Claims

1. A base anchoring structure for a floating navigation wall mooring post, characterized by, The pontoon (1) is anchored to the top edge of the pontoon deck (104) of the pontoon (1) by multiple anchor bolts (4). A bollard (2) is fixedly installed on the top of the bollard base (3). A platform (5) is provided on the bollard base plate (301) of the bollard base (3). An anchor rod (6) is installed at the upper limit of the platform (5). The other end of the anchor rod (6) is hinged to the pin plate (8) after passing through the bollard base plate (301), the pontoon deck (104) and the bottom support plate (7) in sequence. The pin plate (8) is anchored at the top of the anchor block (9). The anchor block (9) is anchored to the inner bottom of the pontoon (1).

2. A base anchoring structure for a mooring post of a floating navigation wall according to claim 1, characterized in that: The pontoon (1) includes a pontoon bottom plate (108) and a pontoon deck (104). A pontoon longitudinal bulkhead (105) and a pontoon transverse bulkhead (106) are provided between the pontoon bottom plate (108) and the pontoon deck (104). A pontoon longitudinal rib (107) is provided on the pontoon bottom plate (108). A rubber fender (101) is fixed on the outer wall of the pontoon (1) and on the side wall that is in contact with the ship. Pontoon side plates (103) are provided on both sides of the pontoon (1).

3. A base anchoring structure for a floating navigation wall mooring post according to claim 2, characterized in that: The bollard base (3) includes a bollard base plate (301), a box-shaped upright plate (304) is fixed to the top of the bollard base plate (301), a box-shaped inner plate (305) is fixed between the box-shaped upright plates (304), a top plate (307) is fixed to the top of the box-shaped upright plates (304) and the box-shaped inner plate (305), the bollard (2) is fixed to the top of the top plate (307) by bolts, a reinforcing plate (306) is provided between the box-shaped upright plates (304) and the bollard base plate (301), a first waist-shaped hole (302) for passing through the anchor rod (6) is machined on the bollard base plate (301), and a limiting plate (303) for limiting the platform (5) is fixed on the bollard base plate (301).

4. The base anchoring structure for a floating navigation wall bollard according to claim 3, characterized in that: The anchor bolts (4) are anchoring chemical bolts. There are 7 anchor bolts (4) arranged in 4 rows parallel to the water flow direction. The first row has 3 bolts, the second row has 2 bolts, the third row has 1 bolt, and the fourth row has 1 bolt. The anchor bolts in the first and second rows are fixed on the pontoon side plate (103), and the bolts in the third and fourth rows are fixed on the pontoon side plate (106).

5. A base anchoring structure for a mooring post of a floating navigation wall according to claim 3, characterized in that: The bottom support plate (7) includes a diagonal support plate (703), and diagonal support fixing plates (702) are fixed at both ends of the diagonal support plate (703). The diagonal support fixing plates (702) are fixedly connected to the inner sidewalls of the pontoon side plate (103) and the pontoon deck (104) by connecting bolts (701).

6. A base anchoring structure for a floating navigation wall mooring post according to claim 5, characterized in that: The diagonal bracing plate (702) that cooperates with the pontoon deck (104) has a second waist-shaped hole (704) for passing through the anchor bolt (6).

7. A base anchoring structure for a floating navigation wall mooring post according to claim 5, characterized in that: The top end of the anchor rod (6) is fixed to the platform bearing plate (501) of the platform (5) by multiple fastening nuts (601). The platform bearing plate (501) adopts a sloping structure. The bottom end of the anchor rod (6) is hinged to the pin clamp plate (8) by a pin (602). The base of the pin plate (8) is welded with hooks, which are connected to the internal steel bars of the anchor block (9).

8. A base anchoring structure for a floating navigation wall mooring post according to claim 5, characterized in that: A counterweight (10) is provided on the bottom plate (108) of the pontoon and on the side of the anchor block (9).

9. A base anchoring structure for a floating navigation wall mooring post according to claim 8, characterized in that: The anchor block (9) and counterweight block (10) are cast-in-place reinforced concrete structures. They are connected to the pontoon longitudinal diaphragm (105), pontoon transverse diaphragm (106) and pontoon longitudinal rib (107) of the pontoon (1) by adding reinforcing bars. The added reinforcing bars are connected and tied to the reinforcing bars in the pontoon longitudinal diaphragm (105), pontoon transverse diaphragm (106) and pontoon longitudinal rib (107). After casting, the anchor block (9) and counterweight block (10) and the pontoon (1) concrete structure form a whole, so that the whole structure can share the load.

10. A base anchoring structure for a floating navigation wall mooring post according to claim 5, characterized in that: The connecting bolts (701) are chemical bolts and are implanted into the pontoon side plate (103) and pontoon deck (104) to fix the diagonal brace fixing plate (702).

Images