CN109372031B - Water-stop material for steel pipe pile cofferdam lock catch - Google Patents

Water-stop material for steel pipe pile cofferdam lock catch Download PDF

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Publication number
CN109372031B
CN109372031B CN201811557753.7A CN201811557753A CN109372031B CN 109372031 B CN109372031 B CN 109372031B CN 201811557753 A CN201811557753 A CN 201811557753A CN 109372031 B CN109372031 B CN 109372031B
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China
Prior art keywords
water
parts
stopping
lock catch
aggregate
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CN201811557753.7A
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Chinese (zh)
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CN109372031A (en
Inventor
朱强洪
李友明
刘文忠
彭亮英
白晓红
苟伟
黄义
何科辉
周文武
付双龙
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Railway Hi Tech Industry Corp Ltd
Xinyun Emgineering Co Ltd of China Railway No 2 Engineering Group Co Ltd
Original Assignee
China Railway Erju Co Ltd
Xinyun Emgineering Co Ltd of China Railway No 2 Engineering Group Co Ltd
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Application filed by China Railway Erju Co Ltd, Xinyun Emgineering Co Ltd of China Railway No 2 Engineering Group Co Ltd filed Critical China Railway Erju Co Ltd
Priority to CN201811557753.7A priority Critical patent/CN109372031B/en
Publication of CN109372031A publication Critical patent/CN109372031A/en
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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D31/00Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
    • E02D31/02Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D19/00Keeping dry foundation sites or other areas in the ground
    • E02D19/02Restraining of open water
    • E02D19/04Restraining of open water by coffer-dams, e.g. made of sheet piles
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22Piles
    • E02D5/24Prefabricated piles
    • E02D5/28Prefabricated piles made of steel or other metals
    • E02D5/285Prefabricated piles made of steel or other metals tubular, e.g. prefabricated from sheet pile elements

Abstract

The invention discloses a water-stop material for a steel pipe pile cofferdam lock catch, which is prepared from the following raw materials in parts by weight: 90-110 parts of aggregate, 9-11 parts of expanded clay and 3-4 parts of reinforcing material; the water-stopping material is formed by mixing the aggregate, the expanded clay and the reinforcing material according to a specific ratio, is used for the lock catch of the steel sheet pile cofferdam, has an excellent water-stopping effect, is not easy to seep water, is convenient to use, has small cohesiveness with the lock catch and low strength, and is easy and quick to remove in a later period; meanwhile, the raw materials are wide in source and low in cost, and are suitable for large-scale application in the building industry.

Description

Water-stop material for steel pipe pile cofferdam lock catch
Technical Field
The invention relates to the field of bridge building materials, in particular to a water-stopping material for a steel pipe pile cofferdam lock catch.
Background
With the rapid development of national economy in China, the construction of a traffic system is increased, a four-vertical eight-horizontal traffic network is formed initially and inevitably passes through mountains, canyons and rivers, so that the method is particularly important for trying to innovate the underwater foundation construction technology of the bridge. At present, the bridge underwater foundation is mainly constructed in a cofferdam structure form, wherein the lock catch steel pipe pile cofferdam is an advanced cofferdam construction technology in recent years, and the structure is simple, the operability is high, and the lock catch steel pipe pile cofferdam is widely applied. The lock catch steel pipe pile is composed of a steel pipe, a C-shaped lock catch and a T-shaped lock catch, the C-shaped lock catch is vertically connected to the pipe wall of the left end of the diameter of the steel pipe, and the cross section of the C-shaped lock catch is in a C shape with one side open. The side face of the C-shaped lock catch is provided with a reinforcing rib, the right pipe wall of the diameter of the steel pipe is vertically connected with the T-shaped lock catch at the eccentric radius position, the cross section of the T-shaped lock catch is I-shaped, and the key point for solving the problem of lock catch steel pipe pile cofferdam water stop is that the structure is adopted. The traditional mode is that adopt the rubber strip to joint a crack stagnant water and adopt grout to inject stagnant water in the hasp, and the existence defect of these two kinds of modes all different degrees adopts the rubber strip to joint a crack, fills in the hasp gap and fills in the rubber strip, and the operating efficiency is low to it is unsatisfactory to the stagnant water effect. The cement slurry is injected into the lock catch, mortar is easy to scatter along with cement in the injection process, the once-injected slurry is not full, the slurry is difficult to perform secondary treatment after solidification, the cement slurry is high in strength, and when the steel pipe pile is pulled out in the later period, friction force is large, and resistance is increased.
Disclosure of Invention
The invention aims to overcome the defects of poor water stopping effect and difficulty in later cleaning of the existing water stopping material for the steel sheet pile cofferdam lock catch, and provides the water stopping material for the steel pipe pile cofferdam lock catch; the water-stopping material is formed by mixing the aggregate, the expanded clay and the reinforcing material according to a specific ratio, is used for the lock catch of the steel sheet pile cofferdam, has an excellent water-stopping effect, is not easy to seep water, is convenient to use, has small cohesiveness with the lock catch and low strength, and is easy and quick to remove in a later period; meanwhile, the raw materials are wide in source and low in cost, and are suitable for large-scale application in the building industry.
In order to achieve the aim, the invention provides a water stopping material for a steel pipe pile cofferdam lock catch, which is prepared from the following raw materials in parts by weight: 90-110 parts of aggregate, 9-11 parts of expanded clay and 3-4 parts of reinforcing material.
The aggregate is a granular loose material with a skeleton or filling function, can increase the compressive strength and the water stopping performance of the water stopping material after water absorption, and simultaneously increases the workability of the water stopping material, is convenient to fill and remove, and has wide source and low cost; preferably, the aggregate is sandstone material with the particle size of 2-6 mm; most preferably, the aggregate is medium coarse sand with the particle size of 3-5 mm; through preferred, stagnant water effect of stagnant water material is better, and intensity is higher during the stagnant water, and after the stagnant water, it is easier to get rid of.
The expanded clay is a clay material with two deformation characteristics of water absorption expansion and water loss contraction, has the functions of bonding and filling pores and preventing water seepage, and is wide in source and low in cost; preferably, the swelling clay is a clay material with the total swelling and shrinking rate more than or equal to 0.5%; more preferably, the swelling clay is one or two of bentonite and swelling soil; most preferably, the swelling clay is a swelling clay; by preference, the water stopping material has a better water stopping effect.
Wherein, the reinforcing material is a material which can disperse the internal stress of the water-stopping material after water absorption and increase the compressive strength; preferably, the reinforcing material is a plant fiber material with the length-diameter ratio of 2-5: 1 and the diameter of 0.5-2mm, the plant fiber material has wide source, low cost, good affinity with water, aggregate and expanded clay and difficult water seepage; most preferably, the plant fiber material is one or more of sawdust, bagasse and straw.
Preferably, the water-stop material for the steel pipe pile cofferdam lock catch is prepared from the following raw materials in parts by weight: 95-105 parts of aggregate, 9-10 parts of expanded clay and 3-3.5 parts of reinforcing material; by optimizing the weight parts of the raw materials, the water stopping effect of the water stopping material can be improved; most preferably, the water-stopping material for the steel pipe pile cofferdam lock catch is prepared from the following raw materials in parts by weight: 100 parts of aggregate, 10 parts of expanded clay and 3.3 parts of reinforcing material.
The water-stopping material for the steel pipe pile cofferdam lock catch is prepared by mixing raw materials according to a proportion.
The filling method of the water-stopping material for the steel pipe pile cofferdam lock catch comprises the following steps: (1) measuring the depth of sand to be filled in the locking notch pipe, cutting a plastic film with corresponding length, and placing the plastic film at the joint of the C-shaped lock catch and the T-shaped lock catch in the lock catch steel pipe pile; (2) pouring water-stopping materials, filling and compacting; (3) and (5) after the water-stopping material in the locking opening is precipitated, repeating the step (2) until the water-stopping material in the lock catch is filled.
The processing method for the leakage of the water-stopping material for the steel pipe pile cofferdam lock comprises the following steps: (1) finding a leakage point; (2) adopting a vibration mode to enable the water stop material in the lock opening to fall down due to vibration, and filling the gap part in the lock opening tightly; (3) and (5) filling a water material.
Preferably, in the step (2) of the leakage treatment method, if the water-stopping material is stuck in the pipe due to condensation and is difficult to fall, the reinforcing steel bars with equal length are inserted into the locking opening, and the insertion and extraction are repeated to make the reinforcing steel bars fall loosely and fill the gap part in the middle.
Compared with the prior art, the invention has the beneficial effects that:
1. the water-stopping material is used for the lock catch of the steel sheet pile cofferdam, is not easy to seep water and has excellent water-stopping effect.
2. The water-stopping material is convenient to use, small in cohesiveness with the lock catch, low in strength and easy and quick to remove in the later period.
3. The water-stopping material has wide raw material source and low cost.
Detailed Description
The present invention will be described in further detail with reference to test examples and specific embodiments. It should be understood that the scope of the above-described subject matter is not limited to the following examples, and any techniques implemented based on the disclosure of the present invention are within the scope of the present invention.
Example 1
The water-stop material is prepared by mixing the following raw materials in parts by weight: 100 parts of medium coarse sand with the particle size of 4.75mm, 10 parts of expansive soil and 3.3 parts of sawdust with the length-diameter ratio of 2: 1 and the diameter of 1.5 mm.
Example 2
The water-stop material is prepared by mixing the following raw materials in parts by weight: 90 parts of stone powder with the particle size of 2mm, 11 parts of bentonite, 3 parts of straw powder with the length-diameter ratio of 2: 1 and the diameter of 2 mm.
Example 3
The water-stop material is prepared by mixing the following raw materials in parts by weight: 110 parts of coarse sand with the particle size of 6mm, 9 parts of expansive soil, 4 parts of bagasse with the length-diameter ratio of 5: 1 and the diameter of 0.5 mm.
Example 4
The water-stop material is prepared by mixing the following raw materials in parts by weight: 105 parts of medium-coarse sand with the particle size of 5mm, 10 parts of expansive soil and 3 parts of sawdust with the length-diameter ratio of 3: 1 and the diameter of 1.0 mm.
Comparative example 1
The water-stop material is prepared by mixing the following raw materials in parts by weight: 120 parts of medium coarse sand with the particle size of 4.75mm, 10 parts of expansive soil and 3.3 parts of sawdust with the length-diameter ratio of 2: 1 and the diameter of 1.5 mm.
Comparative example 2
The water-stop material is prepared by mixing the following raw materials in parts by weight: 100 parts of medium coarse sand with the particle size of 4.75mm, 12 parts of expansive soil, 3.3 parts of sawdust with the length-diameter ratio of 2: 1 and the diameter of 1.5 mm.
Comparative example 3
The water-stop material is prepared by mixing the following raw materials in parts by weight: 100 parts of medium coarse sand with the particle size of 4.75mm, 10 parts of expansive soil and 5 parts of sawdust with the length-diameter ratio of 2: 1 and the diameter of 1.5 mm.
Comparative example 4
The water-stop material is prepared by mixing the following raw materials in parts by weight: 80 parts of medium coarse sand with the particle size of 4.75mm, 10 parts of expansive soil and 3.3 parts of sawdust with the length-diameter ratio of 2: 1 and the diameter of 1.5 mm.
Comparative example 5
The existing cement paste water stop material: 160 parts of cement, 280 parts of bentonite, 32 parts of an expanding agent and 800 parts of water.
Comparative example 6
The existing rubber strip water stop material.
The water-stopping materials prepared in the above examples 1 to 4 and comparative examples 1 to 6 were subjected to a water-stopping experiment (pore: inner diameter 0.3 m. times. length 8 m), and the results were recorded as follows:
from the above results, it can be seen that: the water-stopping material has the advantages of good water-stopping effect, easy retreatment after water seepage, easy removal after water stopping and low cost; in the comparative example 1, the proportion of the aggregates in the water-stopping material exceeds the specification of the invention, gaps among the aggregates cannot be completely filled and bonded by the expanded clay, and water can overflow along the gaps, so that the water-stopping effect of the water-stopping material is obviously reduced; in the comparative example 2, the proportion of the swelling clay in the water stopping material exceeds the specification of the invention, the strength of the water stopping material is reduced, and water flow can wash away the swelling clay, so that permeation is gradually formed in the water stopping material, and the water stopping effect of the water stopping material is obviously reduced; in the comparative example 3, the proportion of the reinforcing material in the water-stopping material exceeds the specification of the invention, so that gaps among the reinforcing materials cannot be completely filled with the expanded clay, water can gradually permeate along the reinforcing material, and the water-stopping effect of the water-stopping material is obviously reduced; in the comparative example 4, the proportion of the aggregate in the water-stopping material is lower than the specification of the invention, the strength of the water-stopping material is reduced, and water flow can wash away the expanded clay, so that permeation is gradually formed in the water-stopping material, and the water-stopping effect of the water-stopping material is obviously reduced; in comparative example 5, compared with the existing cement paste water stopping material, the existing cement paste water stopping material has the same water stopping effect but cannot treat seepage, and meanwhile, after water stopping is finished, the existing cement paste water stopping material is difficult to remove and has higher cost; in comparative example 5, the existing rubber strip water stopping material has a poor water stopping effect and high cost compared with the water stopping material of the invention.

Claims (9)

1. The water-stop material for the steel pipe pile cofferdam lock catch is characterized by being prepared from the following raw materials in parts by weight: 90-110 parts of aggregate, 9-11 parts of expanded clay and 3-4 parts of reinforcing material.
2. The water stopping material as claimed in claim 1, wherein the aggregate is sand and stone material with a particle size of 2-6 mm.
3. The water stopping material as claimed in claim 2, wherein the aggregate is medium coarse sand with a particle size of 3-5 mm.
4. The water stopping material as claimed in claim 1, wherein the swelling clay is a clay material with a total swelling/shrinking rate of 0.5% or more.
5. The water stopping material as claimed in claim 4, wherein the swelling clay is one or two of bentonite and swelling soil.
6. The water stopping material of claim 1, wherein the reinforcing material is a plant fiber material with an aspect ratio of 2-5: 1 and a diameter of 0.5-2 mm.
7. The water stopping material as claimed in claim 6, wherein the plant fiber material is one or more of sawdust, bagasse and straw.
8. The water stopping material as claimed in claim 1, which is prepared from the following raw materials in parts by weight: 95-105 parts of aggregate, 9-10 parts of expanded clay and 3-3.5 parts of reinforcing material.
9. The water stopping material as claimed in claim 8, which is prepared from the following raw materials in parts by weight: 100 parts of aggregate, 10 parts of expanded clay and 3.3 parts of reinforcing material.
CN201811557753.7A 2018-12-19 2018-12-19 Water-stop material for steel pipe pile cofferdam lock catch Active CN109372031B (en)

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Application Number Priority Date Filing Date Title
CN201811557753.7A CN109372031B (en) 2018-12-19 2018-12-19 Water-stop material for steel pipe pile cofferdam lock catch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811557753.7A CN109372031B (en) 2018-12-19 2018-12-19 Water-stop material for steel pipe pile cofferdam lock catch

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CN109372031A CN109372031A (en) 2019-02-22
CN109372031B true CN109372031B (en) 2020-12-22

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Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101597904B (en) * 2009-07-03 2013-02-27 东南大学 Waterproof sheet pile cofferdam and construction method thereof
CN101781894B (en) * 2009-12-23 2012-05-09 中铁大桥局集团第一工程有限公司 Steel pipe pile locking notch structure and water-stopping method of steel pipe pile cofferdam
KR20120066432A (en) * 2010-12-14 2012-06-22 쌍용건설 주식회사 Sealing structure of walled steel pipe pile and sealing method thereof
CN203034467U (en) * 2012-10-31 2013-07-03 东南大学 Combined steel pile cofferdam with water-proof fore shafts
CN108625362A (en) * 2018-06-04 2018-10-09 华东交通大学 A kind of bayonet type cast-in-situ bored pile building enclosure and construction method

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