Anti-sliding construction method and tool for unbalance loading steel cofferdam

Abstract

The invention relates to the technical field of steel cofferdam construction, in particular to an unbalance loading steel cofferdam anti-sliding construction method and tool. The construction method comprises the following steps: S1, surveying and setting out; s2, a notch is excavated; s3, fixing the steel cofferdam; the steel cofferdam can be effectively prevented from sliding on a riverbed, so that the stability of the whole structure is improved; the tool comprises a tool body, and the tool body comprises a plurality of anchoring piles and a connecting frame. The connecting frame comprises a first mounting rod and a second mounting rod; a connecting assembly is arranged between the first mounting rod and the second mounting rod; and the anti-overturning capacity of the steel cofferdam can be further improved.

Description

Technical Field

[0001] The invention relates to the technical field of steel cofferdam construction, in particular to an anti-slip construction method and tooling for an eccentrically loaded steel cofferdam. Background Art

[0002] With the continuous development of the infrastructure industry and the advancement of construction technology, steel cofferdams have been widely used in various deep foundation pit constructions due to their many advantages, such as high strength, light weight, stable material, reliable quality, good durability, water-stopping, pollution-free use throughout the entire process, convenient construction, and good economic efficiency of reuse. However, due to the different terrains where the cofferdams are located, some cofferdams will be affected by the lateral pressure of the soil and sand bodies, especially during the excavation of the foundation pit. If the surrounding soil or sand bodies are unevenly distributed, it will easily lead to unbalanced forces on both sides of the cofferdam. If this lateral pressure is unevenly distributed, or if the lateral pressure on one side is too large due to terrain reasons, it will cause eccentric loading on the cofferdam, which will have an adverse effect on the stability of the cofferdam and may cause safety accidents such as tilting, sliding, or even collapse of the cofferdam. Summary of the invention

[0003] The invention provides an anti-slip construction method and tooling for an eccentrically loaded steel cofferdam, which can overcome certain or some defects of the prior art.

[0004] According to the present invention, an anti-slip construction method for an eccentrically loaded steel cofferdam comprises the following steps: S1. Measurement and Staking After the site is leveled, the surveyors use the total station and level to measure the position and elevation of each anchor pile on one side of the steel cofferdam, determine the position and depth of the excavation slot, and then determine the working surface of the excavation slot along the white line of the stakeout point; S2. Slot excavation After the working surface is determined, an excavator is used to dig at the working surface to form a notch. After the notch is dug, multiple grooves connecting the notch and the steel cofferdam are dug between the notch and the steel cofferdam. S3, Steel cofferdam fixed After the notch and groove are dug out, the anti-slip tooling of the eccentrically loaded steel cofferdam is installed in the notch and groove, and the steel cofferdam is fixed by the tooling; first, anchor piles are arranged at intervals along the length direction of the notch, holes are drilled in the notch by a vibrating hammer, and the crawler crane places the anchor piles into the holes one by one; then, a first mounting rod is installed on one side of the anchor pile, and the first mounting rod is arranged along the length direction of the notch, and a second mounting rod is installed at the steel cofferdam; the first mounting rod is installed on the side of the anchor pile away from the steel cofferdam, and the second mounting rod is installed on the inner side of the steel cofferdam; then, threaded steel bars passing through the first mounting rod and the second mounting rod are installed in the groove, and finally the threaded steel bars are tensioned by tightening the nuts; after the tensioning of the threaded steel bars is completed, the groove is filled.

[0005] Through the present invention, the fixing effect of the anchor piles can effectively prevent the steel cofferdam from slipping on the riverbed, thereby improving the stability of the overall structure; the threaded steel connection enhances the structural strength of the steel cofferdam, and works together with the anchor piles to further enhance the anti-overturning ability of the steel cofferdam.

[0006] This method can be carried out simultaneously with the cofferdam construction, saving construction time; This method utilizes on-site cofferdam construction machinery and personnel to carry out operations. The construction uses simple machinery and materials, requires fewer construction personnel, and reduces construction costs.

[0007] When drilling with a vibratory hammer, drill for 1 minute until the penetration is less than 2 cm. Drilling for 1 minute and observing the penetration is to ensure that the pile can be accurately driven into the ground as designed. When the penetration is less than 2 cm, it means that the pile has reached the required depth or has encountered a harder soil layer. At this time, drilling should be stopped to avoid excessive drilling that may cause damage to the pile or deviation from the designed position.

[0008] Preferably, a fence is set up around the excavated groove for protection and a warning sign is hung.

[0009] Through the present invention, the fence can effectively isolate the slot area and the surrounding environment, prevent people and vehicles from mistakenly entering the slot, thereby reducing the occurrence of accidents and playing a role in safety protection; the warning signs hung on the fence can remind passers-by and vehicles to pay attention to the slot area, increase people's safety awareness, and further reduce the possibility of accidents.

[0010] Preferably, in step S3, when installing the first mounting rod, a bracket for supporting the first mounting rod is welded on the anchor pile.

[0011] According to the present invention, after the construction workers have fixed the anchor pile, a triangular bracket is welded on the anchor pile to facilitate the installation of the first mounting rod. The first mounting rod is placed on the bracket and supported by the bracket, thereby facilitating the construction workers to install the first mounting rod.

[0012] Preferably, in step S3, after the threaded steel bar is tensioned, concrete is poured on top of the threaded steel bar to cover and protect it.

[0013] Through the present invention, a hydraulic jack is used to tension the prestressed threaded steel bar, and after the tensioning is completed, concrete is poured on the top of the threaded steel bar to cover and protect it, so as to prevent the threaded steel bar from being deformed by stress and affecting its use.

[0014] Preferably, in step S3, a PVC pipe needs to be sleeved on the threaded steel bar before the threaded steel bar is installed in the groove.

[0015] Through the present invention, the PVC pipe has good flexibility and corrosion resistance, and can be sleeved on the threaded steel to effectively prevent the threaded steel from being corroded and damaged by the external environment, thereby extending its service life.

[0016] The present invention provides an anti-slip tooling for an eccentrically loaded steel cofferdam, which is suitable for an anti-slip construction method for an eccentrically loaded steel cofferdam, and comprises a tooling main body, the tooling main body comprising a plurality of anchor piles arranged at intervals along the length direction of a slot, and a connecting frame for connecting the anchor piles and the steel cofferdam; the connecting frame comprises a first mounting rod connected to the anchor piles, and a second mounting rod connected to the steel cofferdam; a plurality of connecting components are arranged between the first mounting rod and the second mounting rod, and the connecting components are used to push the first mounting rod and the second mounting rod to move toward each other.

[0017] With the present invention, construction workers first insert the anchor pile into the groove to fix it, then weld the bracket to the anchor pile, then place the first mounting rod on the bracket, then pass the threaded steel bar through the first mounting rod and the steel cofferdam, so that the threaded steel bar extends into the steel cofferdam, then put the second mounting rod on the end of the threaded steel bar extending into the steel cofferdam, finally put nuts on both ends of the threaded steel bar, squeeze the first mounting rod and the second mounting rod by rotating the nuts, and use a hydraulic jack to tension the prestressed threaded steel bar, so that the threaded steel bar is tightened; the anchor pile, the threaded steel bar and the steel cofferdam are connected into a whole, and the fixing effect of the anchor pile can effectively prevent the steel cofferdam from slipping on the riverbed, thereby improving the stability of the overall structure; the threaded steel connection enhances the structural strength of the steel cofferdam, and works together with the anchor pile to further enhance the anti-overturning ability of the steel cofferdam.

[0018] Preferably, the connecting assembly includes two threaded steel bars passing through the first mounting rod and the second mounting rod; the two threaded steel bars are respectively located on both sides of the anchor pile and clamp the anchor pile; nuts matching the threaded steel bars are provided at both ends of the threaded steel bars passing through the first mounting rod and the second mounting rod; through holes for the threaded steel bars to pass through are provided at the first mounting rod and the second mounting rod.

[0019] Through the present invention, the threaded steel bars are clamped on both sides of the anchor pile, which can effectively enhance the overall resistance of the anchor pile to external forces, improve its stability, and prevent accidents such as displacement, pile collapse, and pile breakage under the action of external forces.

[0020] Preferably, a bracket for supporting the first mounting rod is provided at the side wall of the anchor pile.

[0021] According to the present invention, when installing the first installation rod, the construction workers first weld the bracket to the anchor pile, and then place the first installation rod on the bracket when installing the first installation rod, so as to facilitate the construction workers to pass the threaded steel bar through the first installation rod and install the threaded steel bar.

[0022] Preferably, a PVC pipe is provided on the threaded steel bar.

[0023] Through the present invention, the PVC pipe has good flexibility and corrosion resistance. When it is sleeved on the threaded steel, it can effectively prevent the threaded steel from being corroded and damaged by the external environment, thereby extending its service life; it avoids the threaded steel from being corroded and damaged over a long period of time after being buried in the soil.

[0024] Preferably, the first mounting rod and the second mounting rod are made of channel steel.

[0025] Through the present invention, the channel steel has higher strength and rigidity, can bear a larger load, has good stability, and can improve the overall structural strength of the tooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the tooling body in Example 1.

[0027] Figure 2 Schematic diagram of the bracket in Example 1.

[0028] Figure 3 This is a schematic diagram of the connecting frame in Example 1.

[0029] Figure 4 This is a schematic diagram of the installation position of the tooling body and the steel cofferdam in Example 1. DETAILED DESCRIPTION

[0030] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the embodiments. It should be understood that the embodiments are only for explaining the present invention and are not intended to limit it.

[0031] Example 1 like Figure 1-4 As shown, this embodiment provides an anti-slip construction method for an eccentrically loaded steel cofferdam, and the steps are as follows: S1. Measurement and Staking After the site is leveled, the surveyors use the total station and level to measure the position and elevation of each anchor pile 110 on one side of the steel cofferdam 410, determine the position and depth of the excavation slot, and then determine the working surface of the excavation slot along the white line of the stakeout point; S2. Slot excavation After the working surface is determined, an excavator is used to dig at the working surface to form a notch. After the notch is dug, a plurality of grooves connecting the notch and the steel cofferdam 410 are dug between the notch and the steel cofferdam 410. S3, Steel cofferdam fixed After the notch and the groove are dug out, the anti-slip tooling of the eccentrically loaded steel cofferdam 410 is installed in the notch and the groove, and the steel cofferdam 410 is fixed by the tooling; first, the anchor piles 110 are arranged at intervals along the length direction of the notch, holes are drilled in the notch by a vibrating hammer, and the crawler crane puts the anchor piles 110 into the holes one by one; then, a first mounting rod 120 is installed on one side of the anchor pile 110, and the first mounting rod 120 is arranged along the length direction of the notch, and a second mounting rod 150 is installed at the steel cofferdam 410; the first mounting rod 120 is installed on the side of the anchor pile 110 away from the steel cofferdam 410, and the second mounting rod 150 is installed on the inner side of the steel cofferdam 410; then, the threaded steel 130 passing through the first mounting rod 120 and the second mounting rod 150 is installed in the groove, and finally the threaded steel 130 is tensioned by tightening the nut 160; after the tensioning of the threaded steel 130 is completed, the groove is filled.

[0032] Through this embodiment, the fixing effect of the anchor piles 110 can effectively prevent the steel cofferdam 410 from slipping on the riverbed, thereby improving the stability of the overall structure; the threaded steel bar 130 connection enhances the structural strength of the steel cofferdam 410, and works together with the anchor piles 110 to further enhance the anti-overturning ability of the steel cofferdam 410.

[0033] This method can be carried out simultaneously with the cofferdam construction, saving construction time; This method utilizes on-site cofferdam construction machinery and personnel to carry out operations. The construction uses simple machinery and materials, requires fewer construction personnel, and reduces construction costs.

[0034] When drilling with a vibratory hammer, drill for 1 minute until the penetration is less than 2 cm. Drilling for 1 minute and observing the penetration is to ensure that the pile can be accurately driven into the ground as designed. When the penetration is less than 2 cm, it means that the pile has reached the required depth or has encountered a harder soil layer. At this time, drilling should be stopped to avoid excessive drilling that may cause damage to the pile or deviation from the designed position.

[0035] In this embodiment, a fence is set up around the excavated groove for protection, and a warning sign is hung.

[0036] Through this embodiment, the fence can effectively isolate the slot area and the surrounding environment, prevent people and vehicles from mistakenly entering the slot, thereby reducing the occurrence of accidents and playing a role in safety protection; the warning signs hung on the fence can remind passers-by and vehicles to pay attention to the slot area, increase people's safety awareness, and further reduce the possibility of accidents.

[0037] In this embodiment, in step S3 , when installing the first installation rod 120 , a bracket 220 for supporting the first installation rod 120 is welded on the anchor pile 110 .

[0038] Through this embodiment, after the construction workers have fixed the anchor pile 110, a triangular bracket 220 is welded on the anchor pile 110 to facilitate the installation of the first mounting rod 120. The first mounting rod 120 is placed on the bracket 220 and supported by the bracket 220, thereby facilitating the construction workers to install the first mounting rod 120.

[0039] In this embodiment, in step S3, after the threaded steel bar 130 is tensioned, concrete is poured on top of the threaded steel bar to cover and protect it.

[0040] Through this embodiment, a hydraulic jack is used to tension the prestressed threaded steel bar 130. After the tensioning is completed, concrete is poured on the top of the threaded steel bar 130 to cover and protect it, so as to prevent the threaded steel bar 130 from being deformed by force and affecting its use.

[0041] In this embodiment, in step S3, a PVC pipe needs to be sleeved on the threaded steel bar 130 before the threaded steel bar 130 is installed in the groove.

[0042] Through this embodiment, the PVC pipe has good flexibility and corrosion resistance. When it is sleeved on the threaded steel 130, it can effectively prevent the threaded steel from being corroded and damaged by the external environment, thereby extending its service life.

[0043] The present embodiment provides an anti-slip tooling for an eccentrically loaded steel cofferdam, which is suitable for an anti-slip construction method for an eccentrically loaded steel cofferdam, and includes a tooling main body 100, the tooling main body 100 includes a plurality of anchor piles 110 arranged at intervals along the length direction of the slot, and a connecting frame 170 for connecting the anchor piles 110 and the steel cofferdam 410; the connecting frame 170 includes a first mounting rod 120 connected to the anchor pile 110, and a second mounting rod 150 connected to the steel cofferdam 410; a plurality of connecting components 310 are arranged between the first mounting rod 120 and the second mounting rod 150, and the connecting components 310 are used to push the first mounting rod 120 and the second mounting rod 150 to move toward each other.

[0044] According to the present embodiment, the construction personnel first insert the anchor pile 110 into the notch for fixing, then weld the bracket 220 to the anchor pile 110, then place the first mounting rod 120 on the bracket 220, then pass the threaded steel bar 130 through the first mounting rod 120 and the steel cofferdam 410, so that the threaded steel bar 130 extends into the steel cofferdam 410, then put the second mounting rod 150 on the end of the threaded steel bar 130 extending into the steel cofferdam 410, and finally put nuts 160 on both ends of the threaded steel bar 130, and squeeze the first mounting rod 150 by rotating the nuts 160. The mounting rod 120 and the second mounting rod 150 use a hydraulic jack to tension the prestressed threaded steel bar 130, thereby tightening the threaded steel bar 130; the anchor pile 110, the threaded steel bar 130 and the steel cofferdam 410 are connected into a whole. The fixing effect of the anchor pile 110 can effectively prevent the steel cofferdam 410 from slipping on the riverbed, thereby improving the stability of the overall structure; the threaded steel bar 130 connection enhances the structural strength of the steel cofferdam 410, and works together with the anchor pile 110 to further enhance the anti-overturning ability of the steel cofferdam 410.

[0045] In this embodiment, the connecting assembly 310 includes two threaded steel bars 130 passing through the first mounting rod 120 and the second mounting rod 150; the two threaded steel bars 130 are respectively located on both sides of the anchor pile 110 and clamp the anchor pile 110; the threaded steel bars 130 passing through the first mounting rod 120 and the second mounting rod 150 are provided at both ends with nuts 160 threadably matched with the threaded steel bars 130; the first mounting rod 120 and the second mounting rod 150 are provided with through holes 210 for the threaded steel bars 130 to pass through.

[0046] Through this embodiment, the threaded steel bars 130 are clamped on both sides of the anchor pile 110, which can effectively enhance the overall resistance of the anchor pile 110 to external forces, improve its stability, and prevent accidents such as displacement, pile collapse, and pile breakage under the action of external forces.

[0047] In this embodiment, a bracket 220 for supporting the first mounting rod 120 is provided on the side wall of the anchor pile 110 .

[0048] Through this embodiment, when the construction personnel install the first installation rod 120, the bracket 220 is first welded to the anchor pile 110, and then when the construction personnel install the first installation rod 120, the first installation rod 120 is placed on the bracket 220, so as to facilitate the construction personnel to pass the threaded steel bar 130 through the first installation rod 120 and install the threaded steel bar 130.

[0049] In this embodiment, a PVC tube is sleeved on the threaded steel bar 130 .

[0050] Through this embodiment, the PVC pipe has good flexibility and corrosion resistance. When it is installed on the threaded steel 130, it can effectively prevent the threaded steel from being corroded and damaged by the external environment, thereby extending its service life; it also avoids the threaded steel 130 from being corroded and damaged over a long period of time after being buried in the soil.

[0051] In this embodiment, the first mounting rod 120 and the second mounting rod 150 are made of channel steel.

[0052] Through this embodiment, the channel steel has higher strength and rigidity, can withstand larger loads, has good stability, and can improve the overall structural strength of the tooling.

[0053] It is easy to understand that those skilled in the art can combine, split, reorganize, etc. the embodiments of the present application to obtain other embodiments based on one or several embodiments provided in the present application, and these embodiments do not exceed the protection scope of the present application.

[0054] The present invention and its implementation methods are described schematically above, and the description is not restrictive. The embodiments shown in the embodiments are only part of the implementation methods of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by the embodiments and designs a structure and an implementation method similar to the technical solution without creativity without departing from the purpose of the invention, they should all fall within the protection scope of the present invention.

Claims

1. A construction method for anti-slip of eccentrically loaded steel cofferdam, the steps are as follows: S1. Measurement and Staking After the site is leveled, the surveying personnel use a total station and a level to measure the position and elevation of each anchor pile (110) on one side of the steel cofferdam (410), determine the position and depth of the excavation slot, and then determine the working surface of the excavation slot along the white line of the stakeout point; S2. Slot excavation After the working surface is determined, an excavator is used to dig at the working surface to form a notch. After the notch is dug, a plurality of grooves connecting the notch and the steel cofferdam (410) are dug between the notch and the steel cofferdam (410); S3, Steel cofferdam fixed After the notch and the groove are dug out, an anti-slip tooling of an eccentrically loaded steel cofferdam (410) is installed in the notch and the groove, and the steel cofferdam (410) is fixed by the tooling; firstly, anchor piles (110) are arranged at intervals along the length direction of the notch, holes are punched in the notch by a vibrating hammer, and the crawler crane sequentially places the anchor piles (110) into the holes; then, a first installation rod (120) is installed on one side of the anchor pile (110), and the first installation rod (120) is arranged along the length direction of the notch and installed at the steel cofferdam (410). The second installation rod (150) is installed; the first installation rod (120) is installed on the side of the anchor pile (110) away from the steel cofferdam (410), and the second installation rod (150) is installed on the inner side of the steel cofferdam (410); then, a threaded steel bar (130) passing through the first installation rod (120) and the second installation rod (150) is installed in the groove, and finally, the threaded steel bar (130) is tensioned by tightening the nut (160); after the tensioning of the threaded steel bar (130) is completed, the groove is filled.

2. The anti-slip construction method of an eccentrically loaded steel cofferdam according to claim 1 is characterized by: Fences are set up around the excavated groove for protection, and warning signs are hung.

3. The anti-slip construction method of an eccentrically loaded steel cofferdam according to claim 1 is characterized by: In step S3, when installing the first installation rod (120), a bracket (220) for supporting the first installation rod (120) is welded on the anchor pile (110).

4. The anti-slip construction method of an eccentrically loaded steel cofferdam according to claim 1 is characterized by: In step S3, after the threaded steel bar (130) is tensioned, concrete is poured on top of the threaded steel bar to cover and protect it.

5. The anti-slip construction method of an eccentrically loaded steel cofferdam according to claim 1 is characterized by: In step S3, a PVC pipe needs to be sleeved on the threaded steel bar (130) before the threaded steel bar (130) is installed in the groove.

6. An anti-slip tool for an eccentrically loaded steel cofferdam, suitable for an anti-slip construction method for an eccentrically loaded steel cofferdam, characterized in that: The tooling body (100) comprises a plurality of anchor piles (110) arranged at intervals along the length direction of the slot, and a connecting frame (170) used to connect the anchor piles (110) and the steel cofferdam (410); the connecting frame (170) comprises a first mounting rod (120) connected to the anchor pile (110), and a second mounting rod (150) connected to the steel cofferdam (410); a plurality of connecting assemblies (310) are arranged between the first mounting rod (120) and the second mounting rod (150), and the connecting assemblies (310) are used to push the first mounting rod (120) and the second mounting rod (150) to move towards each other.

7. The anti-slip tooling for eccentrically loaded steel cofferdam according to claim 6, characterized in that: The connection assembly (310) comprises two threaded steel bars (130) passing through a first mounting rod (120) and a second mounting rod (150); the two threaded steel bars (130) are respectively located on both sides of the anchor pile (110) and clamp the anchor pile (110); nuts (160) threadably matched with the threaded steel bars (130) are provided at both ends of the threaded steel bars (130) passing through the first mounting rod (120) and the second mounting rod (150); and through holes (210) for the threaded steel bars (130) to pass through are provided at the first mounting rod (120) and the second mounting rod (150).

8. The anti-slip tooling for eccentrically loaded steel cofferdam according to claim 6, characterized in that: A bracket (220) for supporting the first installation rod (120) is provided on the side wall of the anchor pile (110).

9. The anti-slip tooling for eccentrically loaded steel cofferdam according to claim 7, characterized in that: A PVC pipe is provided on the upper sleeve of the threaded steel (130).

10. The anti-slip tooling for eccentrically loaded steel cofferdam according to claim 6, characterized in that: The first mounting rod (120) and the second mounting rod (150) are made of channel steel.

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