CN210887256U - Straight combined sheet pile-ground wall-connecting type frame of water retaining cofferdam - Google Patents
Straight combined sheet pile-ground wall-connecting type frame of water retaining cofferdam Download PDFInfo
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- CN210887256U CN210887256U CN201921597213.1U CN201921597213U CN210887256U CN 210887256 U CN210887256 U CN 210887256U CN 201921597213 U CN201921597213 U CN 201921597213U CN 210887256 U CN210887256 U CN 210887256U
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Abstract
The water retaining cofferdam straight combined sheet pile ground connecting wall type frame comprises a straight plastic steel combined sheet pile (2) and a steel reinforcement cage (3); the water facing side of the outer vertical surface of the steel reinforcement cage (3) is tightly attached and vertically provided with straight plastic steel composite sheet piles (2), and at least two adjacent straight plastic steel composite sheet piles (2) are spliced in a cutting way. The straight composite sheet pile and ground connecting wall type frame of the water retaining cofferdam combines the construction of the straight plastic steel composite sheet pile and the ground connecting wall, has high impermeability, strong stability and convenient construction, does not need to take reinforcement measures such as high-pressure rotary jet grouting piles and the like in the later period, saves the construction time and cost, is particularly suitable for water retaining cofferdam engineering with high impermeability requirement, and has wide application prospect.
Description
Technical Field
The utility model relates to a hydraulic engineering manger plate cofferdam structure, especially a straight composite sheet pile ground of manger plate cofferdam is wall formula frame even.
Background
The steel sheet pile cofferdam is the most common one. The steel sheet pile is a section steel with locking notch, and its section has straight plate shape, groove shape and Z shape, and has various sizes and interlocking forms. The common forms include Larson type, Lakevanna type, etc. Its advantage does: the strength is high, and the soil can be easily driven into a hard soil layer; the coating can be constructed in deep water and has good waterproof performance; the cofferdams with various shapes can be formed according to the needs, and can be repeatedly used, so that the application is wide. The method is commonly used for cofferdams of sinking well tops, cofferdams of pipe column foundations, pile foundations, open cut foundations and the like in bridge construction. The cofferdams are mainly formed by adopting single-wall closed cofferdams, and longitudinal and transverse supports are arranged in the single-wall closed cofferdams, and inclined supports are added to form a surrounding cage if necessary. In hydraulic construction, the construction area is large, and the construction body cofferdam is usually made of a plurality of interconnected monomers, each monomer is composed of a plurality of steel sheet piles, and the middle of the monomer is filled with soil. The cofferdam has a large range of enclosure, and cannot support the dam wall by using a support, so that each single body can independently resist overturning and sliding and prevent tension cracks at the interlocking part, and the common forms comprise a round shape, a partition wall shape and the like.
In a building foundation pit, a soil and water retaining structure directly bears the action of horizontal load, and common structural forms comprise a high-pressure jet grouting pile, a steel plate pile, a high-strength plastic-steel combined plate pile, a cast-in-place underground continuous wall, a cast-in-place cast-in-situ bored pile, a reinforced concrete gravity retaining wall, a prestressed U-shaped concrete plate pile and the like. The high-strength plastic-steel composite sheet pile has wide application, and can be used for wharfs, retaining walls, flood banks and the like in the aspect of permanent buildings; in the aspect of temporary buildings, the method can be used for building cofferdams, foundation pit enclosures and the like. As one type of the supporting and retaining structure, the high-strength plastic steel composite sheet pile has the advantages of high strength, light weight and the like.
The prior high-strength plastic steel combined plate pile cofferdam which is disclosed still has the defects in the aspects of overall stability and construction convenience:
1) although the high-strength plastic steel composite sheet pile has good impermeability, when the high-strength plastic steel composite sheet pile is used for a retaining structure, the water pressure at the rear side of the pile is difficult to reduce, and the whole manufacturing cost of the retaining structure is high due to the fact that the pile body needs to bear large horizontal force.
2) Under the working condition that the foundation is harder, the piling construction is difficult to be smoothly implemented.
At present, as an improved technology, the construction process of the steel sheet pile cofferdam diaphragm wall is mature day by day, the rigidity of the wall body is high, and the groove is filled with slurry before concrete is poured, so that the difficulty of inserting the high-strength plastic steel composite sheet pile is greatly reduced. However, after the diaphragm wall concrete reaches a certain strength, in order to prevent quality problems such as water leakage at the joint due to incomplete construction at the joint of the diaphragm wall, reinforcement treatment has to be performed at the joint of the diaphragm wall, which significantly increases the construction time and cost.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a straight combination sheet pile ground is wall formula manger plate cofferdam even, remedies above not enough, solves prior art problem.
In order to realize the technical purpose, the utility model adopts the following technical proposal: comprises a straight plastic steel combined sheet pile and a reinforcement cage; and the water facing side of the outer vertical surface of the steel reinforcement cage is tightly adhered and vertically provided with straight plastic steel composite sheet piles, and at least two adjacent straight plastic steel composite sheet piles are spliced in a cutting way.
Particularly, adjacent straight plastic steel composite sheet piles are connected with T-shaped connectors in a cutting mode through grooves, and sealing connection of joint positions is guaranteed.
Particularly, the vertical guide frame is arranged along the outer side of the reinforcement cage.
Particularly, the steel reinforcement cage and the straight plastic steel composite sheet pile are fixedly connected through an anchor rod; wherein, the stock is I shape steel bar structure.
Particularly, vertical inserting guide pipes are vertically distributed in the steel reinforcement cage and outside the water facing side of the straight plastic steel composite sheet pile.
The utility model discloses an advantage and effect: the construction is convenient, the stability is strong, the anti-seepage performance is high, reinforcement measures such as high-pressure jet grouting piles are not needed in the later period, the construction time and the cost are saved, the method is particularly suitable for water retaining cofferdam engineering with high anti-seepage performance requirements, and the application prospect is wide.
Drawings
Fig. 1 is a top view of the embodiment of the present invention, which is a straight composite sheet pile ground wall-connecting type water retaining cofferdam.
Fig. 2 is a schematic view of a vertical section of a flat combined sheet pile ground wall-connected water retaining cofferdam in an embodiment of the present invention.
Fig. 3 is a schematic perspective view of a straight plastic-steel composite sheet pile according to an embodiment of the present invention.
The reference numerals include:
the concrete pile comprises 1-guide wall, 2-straight plastic steel composite sheet pile, 3-reinforcement cage, 4-concrete, 5-slurry, 6-guide pipe, 7-anchor rod, 21-groove and 22-T-shaped connector.
Detailed Description
The utility model discloses the principle lies in, research and development novel construction bearing structure, and innovation construction process builds high strength straight combination sheet pile ground even wall formula manger plate cofferdam, combines straight plastic steel combination sheet pile and ground even wall construction, just can get strong point and make up for the weak point, obtains high anti-permeability performance, compensaties respective not enough.
In the utility model, as shown in the attached figure 1, include: a straight plastic steel combined sheet pile 2 and a reinforcement cage 3.
The utility model discloses in, as shown in figure 2, straight combination sheet pile ground is wall formula manger plate cofferdam construction method includes following steps:
the method comprises the following steps: excavating a guide channel, and building a guide wall 1 along the guide channel;
step two: determining the proportion of the slurry 5 through tests, excavating a construction groove at the bottom of the cofferdam position, continuously supplementing slurry in the process, and stopping excavating after excavating to the designed depth;
step three: arranging a reinforcement cage 3 along the construction groove;
step four: arranging a vertical guide frame along the outer side of the steel reinforcement cage 3, vertically abutting the straight plastic steel composite sheet pile 2 against the water facing side of the steel reinforcement cage 3, inserting the straight plastic steel composite sheet pile 2 into the slurry 5 section by section, and connecting the straight plastic steel composite sheet pile 2 to the steel reinforcement cage 3 through an anchor rod 7;
step five: inserting guide pipes 6 are vertically distributed on two sides of the straight plastic steel composite sheet pile 2, concrete 4 is injected into the construction groove along the guide pipes 6 until the designed height is reached, and slurry 5 floats on the upper side of the concrete 4.
The following is further illustrated by examples and figures.
Example (b): as shown in fig. 1, 2 and 3, adjacent straight plastic steel composite sheet piles 2 are connected in a cutting mode through grooves 21 and T-shaped connectors 22, and sealing connection of joint parts is guaranteed.
In the foregoing, lead wall 1 and adopt "| -L" type cast-in-place reinforced concrete structure, the top elevation is higher than the water level 20-30 cm.
In the above, the reinforcement cage 3 and the straight plastic steel composite sheet pile 2 are fixedly connected through the anchor rod 7; wherein, stock 7 is I-shaped steel bar structure, ensures closely laminating between steel reinforcement cage 3 and straight plastic steel composite sheet pile 2.
In the above, the funnel is arranged at the upper end of the guide pipe 6, the concrete 4 is poured into the construction tank from top to bottom through the guide pipe 6, and the concrete 4 sinks into the bottom of the tank by self weight to replace the original slurry 3 in the tank.
The embodiment of the utility model provides an in, straight plastic steel composite sheet pile 2 material is high strength plastic steel, is straight plate form, and both ends are erected the limit and are recess 21 and T shape connector 22 respectively, and through recess 21 and T shape connector 22 accordant connection between two or more straight plastic steel composite sheet piles 2 each other, can effectively guarantee the sealed linking at seam position through mechanical interlock. The slurry 3 is continuously filled in the construction groove digging process, and the effect of stabilizing and supporting the groove wall can be achieved. The insertion accuracy of the straight plastic steel composite sheet pile 2 is improved by utilizing the construction guide frame, and the straight plastic steel composite sheet pile 2 is ensured to be vertically inserted into the slurry 5. The straight plastic steel composite sheet pile 2 is arranged on the water facing side, is tightly attached to the reinforcement cage 3, is integrally cast with the diaphragm wall, and finally serves as a part of a reinforcement protection layer, so that the seepage-proofing performance of the diaphragm wall is greatly improved.
The embodiment of the utility model provides an in, concrete construction steps as follows:
firstly, a specific construction area is planned before construction, a field is leveled, a guide channel is excavated after the construction is carried out, and then the construction of the guide wall 1 is carried out. After the construction of the guide wall 1 is finished, the proportion of the slurry 5 is determined through tests, the construction of the construction groove is started, and the slurry is continuously supplemented in the groove digging process. And after digging to the designed depth, cleaning the residue soil and the deposited slurry at the bottom. After the cleaning work is finished, the joint pipes and the reinforcement cage 3 are arranged. After the hoisting operation is completed, a construction guide frame is laid, the straight plastic steel composite plate piles 2 are tightly attached to the water-facing side of the steel reinforcement cage 3, the mud 5 is inserted section by section, and the adjacent straight plastic steel composite plate piles 2 are connected with the T-shaped connector 22 in a matched mode through the grooves 21 and are connected to the steel reinforcement cage 3 through the anchor rods 7. And after the concrete 4 is poured to the designed height, completing the construction of the groove section, and repeating the steps until the construction of all the groove sections is completed.
The embodiment of the utility model provides an in, the level and smooth requirement in place among the work progress leads pouring and the maintenance requirement of wall 1, the technical requirement of 5 ratios of mud, the hoist and mount of steel reinforcement cage 3, the concrete technological requirement of grooving construction and straight plastic steel composite sheet pile 2 construction, the requirement etc. of pouring of inslot concrete 4 go on according to general technical standard.
Claims (5)
1. The water retaining cofferdam straight combined sheet pile ground connecting wall type frame comprises a straight plastic steel combined sheet pile (2) and a steel reinforcement cage (3); the method is characterized in that the water facing side of the outer vertical surface of the reinforcement cage (3) is tightly attached and vertically provided with straight plastic steel composite sheet piles (2), and at least two adjacent straight plastic steel composite sheet piles (2) are spliced in a cutting way.
2. The water-retaining cofferdam flat combined sheet pile ground-wall-connected frame as recited in claim 1, characterized in that adjacent flat plastic steel combined sheet piles (2) are inserted and connected through a groove (21) and a T-shaped connector (22).
3. The water-retaining cofferdam flat sectional sheet pile diaphragm wall frame as recited in claim 1, characterized in that the vertical guide frame is laid along the outside of the reinforcement cage (3).
4. The water-retaining cofferdam straight composite sheet pile ground-connecting wall type frame as recited in claim 1, characterized in that the steel reinforcement cage (3) and the straight plastic steel composite sheet pile (2) are fixedly connected through anchor rods (7); wherein, the anchor rod (7) is of an I-shaped steel bar structure, so that the steel reinforcement cage (3) is tightly attached to the straight plastic steel composite sheet pile (2).
5. The water-retaining cofferdam flat combined sheet pile diaphragm wall type frame as claimed in claim 1, wherein the vertical inserting pipes (6) are vertically arranged in the steel reinforcement cage (3) and outside the water facing side of the flat plastic steel combined sheet pile (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921597213.1U CN210887256U (en) | 2019-09-24 | 2019-09-24 | Straight combined sheet pile-ground wall-connecting type frame of water retaining cofferdam |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921597213.1U CN210887256U (en) | 2019-09-24 | 2019-09-24 | Straight combined sheet pile-ground wall-connecting type frame of water retaining cofferdam |
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| CN210887256U true CN210887256U (en) | 2020-06-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110565666A (en) * | 2019-09-24 | 2019-12-13 | 上海市水利工程集团有限公司 | Construction method of flat combined sheet pile ground connecting wall type water retaining cofferdam |
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2019
- 2019-09-24 CN CN201921597213.1U patent/CN210887256U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110565666A (en) * | 2019-09-24 | 2019-12-13 | 上海市水利工程集团有限公司 | Construction method of flat combined sheet pile ground connecting wall type water retaining cofferdam |
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