CN102535519A - I-shaped steel joint structure for underground continuous wall and construction method for I-shaped steel joint structure - Google Patents

I-shaped steel joint structure for underground continuous wall and construction method for I-shaped steel joint structure Download PDF

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Publication number
CN102535519A
CN102535519A CN201210075030XA CN201210075030A CN102535519A CN 102535519 A CN102535519 A CN 102535519A CN 201210075030X A CN201210075030X A CN 201210075030XA CN 201210075030 A CN201210075030 A CN 201210075030A CN 102535519 A CN102535519 A CN 102535519A
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CN
China
Prior art keywords
iron
cloth
width
joint
dowel
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CN201210075030XA
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Chinese (zh)
Inventor
马文旭
莫海鸿
孙严
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广州中煤江南基础工程公司
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Application filed by 广州中煤江南基础工程公司 filed Critical 广州中煤江南基础工程公司
Priority to CN201210075030XA priority Critical patent/CN102535519A/en
Publication of CN102535519A publication Critical patent/CN102535519A/en

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Abstract

The invention discloses a steel joint structure for an underground continuous wall and a construction method for the steel joint structure, belongs to the technical field of underground continuous walls and aims to provide a steel joint structure for the underground continuous wall which is simple and has a good water stopping effect. According to technical key points, the steel joint structure comprises a front terrae spacing, a rear adjacent terrae spacing and I-shaped steel which is connected between the front terrae spacing and the rear adjacent terrae spacing, wherein anchor bars are distributed among connecting parts between the I-shaped steel and the rear adjacent terrae spacing. The construction method mainly comprises the following steps of: (1) excavating a ground groove of the front terrae spacing; (2) manufacturing a reinforcement cage of the front terrae spacing, and arranging an I-shaped steel joint on the end part of the reinforcement cage of the front terrae spacing; (3) arranging the anchor bars; (4) hoisting and placing the reinforcement cage, and arranging a mud blocking joint pipe on the outer sides of the anchor bars; (5) performing cast molding on concrete; (6) excavating a ground groove of the rear adjacent terrae spacing, manufacturing a reinforcement cage, hoisting a joint pipe, hoisting and placing the reinforcement cage, and cleaning the anchor bars; (7) performing cast molding on the concrete; and (8) circulating the steps from (2) to (7) to form the continuous wall.

Description

Diaphragm wall i iron joint design and job practices thereof

Technical field

The present invention relates to a kind of underground continuous wall connector structure, more particularly, relate in particular to a kind of diaphragm wall i iron joint design.

Background technology

Diaphragm wall is exactly to carry out the grooving operation in advance, forms the groove section of certain-length, and install reinforcing cage, pour concrete form unit wall section in the groove section, unit wall section is coupled together form one continuous underground reinforced concrete wall then.Diaphragm wall can be constructed under complex conditions, and construction depth is big, and the support unit supporting capacity is big, and barrier performance is good, is the most reliable support pattern in the pattern foundation pit supporting structure.Especially in layer of sand, reach stagnant water effect, must adopt diaphragm wall to be only support pattern the most reliably.At present, diaphragm wall is also made the form of the three walls unification of the permanent load-bearing external wall structure of basement simultaneously not only as interim space enclosing structure retaining soil and sealing.

Diaphragm wall is that one one width of cloth is constructed, and adopts mud off in the grooving process, and joint can adhere to a part of mud skin between the wall width of cloth.Because the existence of mud skin, concrete will form certain slit between the wall width of cloth, and under the bigger situation of water and soil pressure, seepage appears in seam easily, we can say, the sealing of wall width of cloth joint keeps off native effect and determined the diaphragm wall anti-seepage effect.The method that underground continuous wall connector adopts usually is forms such as junction block, i iron, cross steel plate.Because the seepage of seam between the wall width of cloth adopts agitation pile, rotary churning pile shutoff, the perhaps pre-buried Grouting Pipe slip casting shutoff at wall width of cloth spigot place in socket place of the wall width of cloth usually.

It is a kind of ways that generally adopt that the joint adopts i iron to connect two width of cloth walls.I iron has certain rigidity and intensity, can form two width of cloth walls and connect comparatively reliably.But the meeting of i iron joint is owing to streaming and being attached to make on the i iron between back cast section concrete and the i iron of mud accompanies the mud skin.For gathering the problem of mud skin in i iron, generally pour into a mould the side i iron after the shutoff of employing parcel on the engineering, reduce the mud skin and gather formation, and be aided with the terminal bruss cleaning.But the measure of continuous wall width of cloth seam does not effectively solve the i iron seam yet.Simultaneously, to the i iron joint differential deformation that the wall width of cloth produces under water and soil pressure, concrete shrinkage also is inevitable technical factor.Stress deformation and concrete shrink and make seam further strengthen.After diaphragm wall was greater than certain depth, the water outside huge water pressure makes, sand brought very large risk for foundation ditch safety in seam is brought foundation ditch into.In addition, as the main body side wall of permanent structure, the joint seepage brings many inconvenience, while structure useful life longevity also to have certain hidden danger will for the normal use of building.

Summary of the invention

The objective of the invention is to the deficiency to above-mentioned prior art, a kind of simple in structure, diaphragm wall i iron joint design that stagnant water effect is good is provided.

Another technical problem that the present invention will solve provides a kind of job practices of said structure.

Last technical scheme of the present invention is achieved in that a kind of diaphragm wall i iron joint design; Comprise in advance the wall width of cloth, back in abutting connection with the wall width of cloth, be connected in advance the wall width of cloth and back in abutting connection with the i iron between the wall width of cloth, wherein said i iron with after between the connecting portion of the wall width of cloth, be distributed with dowel.

Further, in the above-mentioned diaphragm wall i iron joint design, described i iron is a unsymmetric structure, i iron and back in abutting connection with the connecting portion of the wall width of cloth than the i iron and the wide 100~300mm of connecting portion of the wall width of cloth in advance.

In the above-mentioned diaphragm wall i iron joint design, described i iron and back in abutting connection with the inwall of a wall side be provided with at least one be distributed with spray orifice the grouting scavenge pipe, be used for cleaning and the grouting treatment that becomes the wall later stage to dowel.

In the above-mentioned diaphragm wall i iron joint design, described dowel is fixedly connected with i iron, and the length of dowel is 100~150mm; The distribution density of dowel is: 200~500mm * 200~500mm.

Back of the present invention one technical scheme is such: a kind of job practices of diaphragm wall i iron joint design comprises the steps: (1) excavation ground slots of the wall width of cloth in advance; (2) make the reinforcing cage of the wall width of cloth in advance, and the i iron joint is set in the reinforcing cage end of the wall width of cloth of going ahead of the rest; (3) at the inboard welding of i iron distribution dowel; (4) reinforcing cage that hangs the wall width of cloth in advance and is provided with between the dowel outside and i iron inboard and keeps off the mud junction block in the ground slots of the wall width of cloth in advance; (5) wall width of cloth concreting moulding in advance; (6) the back ground slots in abutting connection with the wall width of cloth in the excavation junction block outside, and make the reinforcing cage of back in abutting connection with the wall width of cloth hangs out junction block then, hang the back in abutting connection with the reinforcing cage of the wall width of cloth in the back in the ground slots of the wall width of cloth, clean dowel; (7) back is in abutting connection with wall width of cloth concreting moulding; (8) circulation step (2)~(7) can form diaphragm wall.

In the job practices of above-mentioned a kind of diaphragm wall i iron joint design, the retaining mud junction block described in the step (4) is an above round tube that vertically is provided with; Retaining mud junction block described in the step (4) also can be the box section that adapts with i iron.

In the job practices of above-mentioned a kind of diaphragm wall i iron joint design, step (4) also is included in i iron and the process of back in abutting connection with the inwall placement grouting scavenge pipe of a wall side.

After the present invention adopts said structure, compared with prior art, have following advantage:

(1) through between the connecting portion of the wall width of cloth, dowel being set at i iron and back; I iron is connected in abutting connection with forming between the wall width of cloth with the back effectively; And the good rigid joint of formation barrier performance; Overcome i iron and back in abutting connection with producing the seam leakage problems that differential deformation brings because of concrete shrinkage and stressed back between the wall width of cloth, reach and improve the whole anti-permeability performance of diaphragm wall seam.

(2) job practices of the present invention has been taked the construction form of the combination of i iron joint, junction block and distribution dowel, have simple in structure, inexpensive, stagnant water effect good, can improve the impervious ability of diaphragm wall seam and prevent the characteristics of joint portion seepage.The purpose of the adding of junction block stops streaming of mud when being fluid concrete, the purpose of the adding of dowel is to prevent the binding site leakage problems at i iron, reinforcing cage and junction block position just.The diaphragm wall that adopts this technology to work it out, the body of wall more than 100 meters can both reach the husky effect of good dash retaining basically, prevents seepage.

(3) adopted whole junction block, having can handled easily, saves time and characteristics that result of use is good.

Description of drawings

Below in conjunction with the embodiment in the accompanying drawing the present invention is done further detailed description, but do not constitute any restriction of the present invention.

Fig. 1 is the structural representation of the specific embodiment of the invention 1;

Fig. 2 is the structural representation of the specific embodiment of the invention 2;

Fig. 3 is the structural representation of the specific embodiment of the invention 3;

Fig. 4 is the structural representation of the concrete job practices 1 of the present invention;

Fig. 5 is the structural representation of the concrete job practices 2 of the present invention.

Among the figure: in advance wall 1, back are in abutting connection with wall 2, i iron 3, dowel 4, grouting scavenge pipe 5, retaining mud junction block 6.

The specific embodiment

Consult shown in Figure 1; A kind of diaphragm wall i iron joint design of the present invention; Comprise wall in advance 1, back in abutting connection with wall 2, be connected wall in advance 1 and back in abutting connection with the i iron 3 between the wall 2, key of the present invention be i iron 3 with after between the connecting portion of wall 2, be distributed with dowel 4; I iron 3 in the present embodiment is a unsymmetric structure; I iron 3 and back are in abutting connection with the connecting portion of wall the 2 wide 100~300mm of connecting portion than i iron 3 and wall in advance 1; So more help distributed and arranged dowel 4, strengthen the connection effect, improve the joint barrier performance of diaphragm wall.Dowel 4 among the present invention can form a fixed connection through welding with i iron 3, and the length of dowel 4 can adopt 100~150mm as required; The distribution density of dowel 4 also as required (like the degree of depth of diaphragm wall) between 200~500mm * 200~500mm, select, the spacing distance between the promptly adjacent dowel 4 is 200~500mm.

Embodiment 2

Consult shown in Figure 2; Another kind of diaphragm wall i iron joint design of the present invention; Basic identical with embodiment 1; Not existing together is that the inwall in abutting connection with wall 2 one side is provided with two grouting scavenge pipes 5 that are distributed with spray orifice in i iron 3 and back, is used for employing water under high pressure to dowel 4 and cleans and become the wall later stage to adopt high mud jacking to carry out grouting treatment, is convenient to construct and becomes the joint antiseepage in wall later stage to handle.

Embodiment 3

Consult shown in Figure 3ly, basic identical with embodiment 1 for another kind of diaphragm wall i iron joint design of the present invention, not existing together is to connect wall in advance 1 and back to be special-shaped joint in abutting connection with the i iron 3 between the wall 2, and its implementation result and embodiment 1 are basic identical.

Embodiment 4

Consult shown in Figure 4ly,, specifically comprise the steps: for one of concrete form of construction work of the present invention

(1) the excavation ground slots of wall 1 in advance;

(2) make the reinforcing cage of the wall width of cloth in advance, and i iron 3 joints are set in the reinforcing cage end of wall in advance 1;

(3) at i iron 3 inboard welding distribution dowels 4;

(4) reinforcing cage that hangs wall in advance 1 and is provided with retaining mud junction block 6 between dowel 4 outsides and i iron 3 inboards in the ground slots of wall in advance 1, retaining mud junction block 6 be three round tubes of vertical setting;

(5) wall 1 a concreting moulding in advance;

(6) the back ground slots in abutting connection with wall 2 in excavation junction block 6 outsides, and make the reinforcing cage of back in abutting connection with wall 2 hangs out junction block 6 then, hangs the back and in 2 the ground slots, cleans dowel 4 with water under high pressure in the back in abutting connection with wall in abutting connection with the reinforcing cage of wall 2;

(7) back is in abutting connection with wall 2 a concreting moulding;

(8) circulation step (2)~(7) can form diaphragm wall.

Embodiment 5

Consult shown in Figure 5; Be another kind of job practices of the present invention; Itself and embodiment 4 job practicess are basic identical, and different the is retaining mud junction block 6 described in the step 4 box section for adapting with i iron 3 can certainly adopt the big inboard little laddertron in the outside; And step (4) also is included in i iron 3 and the process of back in abutting connection with the inwall placement grouting scavenge pipe 5 of wall 2 one side.

The present invention also can construct by traditional sand hill retaining slurry mode; In a word; The above-mentioned specific embodiment is the preferred embodiments of the present invention; Can not limit the present invention, other any change or other equivalent substitute mode that does not deviate from technical scheme of the present invention and made is included within protection scope of the present invention.

Claims (9)

1. diaphragm wall i iron joint design; Comprise in advance the wall width of cloth (1), back in abutting connection with the wall width of cloth (2), be connected in advance the wall width of cloth (1) with afterwards in abutting connection with the i iron (3) between the wall width of cloth (2); It is characterized in that described i iron (3) and back are in abutting connection with being distributed with dowel (4) between the connecting portion of the wall width of cloth (2).
2. diaphragm wall i iron joint design according to claim 1; It is characterized in that; Described i iron (3) is a unsymmetric structure, i iron (3) and back in abutting connection with the connecting portion of the wall width of cloth (2) than the i iron (3) and the wide 100~300mm of connecting portion of the wall width of cloth (1) in advance.
3. diaphragm wall i iron joint design according to claim 1 and 2 is characterized in that, described i iron (3) and back in abutting connection with the inwall of the wall width of cloth (2) one sides be provided with at least one be distributed with spray orifice grouting scavenge pipe (5).
4. diaphragm wall i iron joint design according to claim 1 and 2 is characterized in that, described dowel (4) is fixedly connected with i iron (3), and the length of dowel (4) is 100~150mm; The distribution density of dowel (4) is: 200~500mm * 200~500mm.
5. want 3 described diaphragm wall i iron joint designs according to right, it is characterized in that, described dowel (4) is fixedly connected with i iron (3), and the length of dowel (4) is 100~150mm; The distribution density of dowel (4) is: 200~500mm * 200~500mm.
6. the job practices of the said diaphragm wall i iron of claim 1 joint design is characterized in that comprising the steps: (1) excavation ground slots of the wall width of cloth (1) in advance; (2) make the reinforcing cage of the wall width of cloth in advance, and i iron (3) joint is set in the reinforcing cage end of the wall width of cloth (1) of going ahead of the rest; (3) at the inboard welding of i iron (3) distribution dowel (4); (4) reinforcing cage that hangs the wall width of cloth (1) in advance and is provided with between dowel (4) outside and i iron (3) inboard and keeps off mud junction block (6) in the ground slots of the wall width of cloth (1) in advance; (5) the wall width of cloth (1) concreting moulding in advance; (6) the back ground slots in abutting connection with the wall width of cloth (2) in excavation junction block (6) outside, and make the reinforcing cage of back in abutting connection with the wall width of cloth (2) hangs out junction block (6) then, hang the back in abutting connection with the reinforcing cage of the wall width of cloth (2) in the back in the ground slots of the wall width of cloth (2), clean dowel (4); (7) back is in abutting connection with the wall width of cloth (2) concreting moulding; (8) circulation step (2)~(7) can form diaphragm wall.
7. want 6 described methods according to right, it is characterized in that, the retaining mud junction block (6) described in the step (4) is an above round tube that vertically is provided with.
8. want 6 described methods according to right, it is characterized in that, the retaining mud junction block (6) described in the step (4) is the box section that adapts with i iron (3).
9. want 6 described methods according to right, it is characterized in that, step (4) also is included in i iron (3) and the process of back in abutting connection with the inwall placement grouting scavenge pipe (5) of the wall width of cloth (2) one sides.
CN201210075030XA 2012-03-20 2012-03-20 I-shaped steel joint structure for underground continuous wall and construction method for I-shaped steel joint structure CN102535519A (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102776878A (en) * 2012-08-17 2012-11-14 中铁四局集团第五工程有限公司 Construction method for preventing diaphragm wall from streaming
CN103741723A (en) * 2013-12-16 2014-04-23 上海电力设计院有限公司 Joint waterproof structure of underground diaphragm wall of underground substation
CN104878741A (en) * 2015-05-12 2015-09-02 安徽省建筑科学研究设计院 Post-grouting waterproof structure for wall joint of underground diaphragm wall and waterproof method thereof
CN104947720A (en) * 2015-06-19 2015-09-30 上海建工二建集团有限公司 High-pressure airflow stripping type joint box and using method thereof
CN105804056A (en) * 2016-03-25 2016-07-27 中交第三航务工程勘察设计院有限公司 Even wall connector structure with tensile function and construction method of even wall connector structure with tensile function
CN106168037A (en) * 2016-08-31 2016-11-30 上海市地矿建设有限责任公司 A kind of diaphram wall peg shaped-steel joint device and application thereof
CN108035337A (en) * 2017-12-18 2018-05-15 上海应用技术大学 For the connector of diaphram wall and the construction method of diaphram wall

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102776878A (en) * 2012-08-17 2012-11-14 中铁四局集团第五工程有限公司 Construction method for preventing diaphragm wall from streaming
CN103741723A (en) * 2013-12-16 2014-04-23 上海电力设计院有限公司 Joint waterproof structure of underground diaphragm wall of underground substation
CN104878741A (en) * 2015-05-12 2015-09-02 安徽省建筑科学研究设计院 Post-grouting waterproof structure for wall joint of underground diaphragm wall and waterproof method thereof
CN104947720A (en) * 2015-06-19 2015-09-30 上海建工二建集团有限公司 High-pressure airflow stripping type joint box and using method thereof
CN104947720B (en) * 2015-06-19 2016-08-24 上海建工二建集团有限公司 High pressure draught stripping type joint case and using method thereof
CN105804056A (en) * 2016-03-25 2016-07-27 中交第三航务工程勘察设计院有限公司 Even wall connector structure with tensile function and construction method of even wall connector structure with tensile function
CN106168037A (en) * 2016-08-31 2016-11-30 上海市地矿建设有限责任公司 A kind of diaphram wall peg shaped-steel joint device and application thereof
CN106168037B (en) * 2016-08-31 2018-01-09 上海市地矿建设有限责任公司 A kind of diaphram wall peg shaped-steel joint device and its application
CN108035337A (en) * 2017-12-18 2018-05-15 上海应用技术大学 For the connector of diaphram wall and the construction method of diaphram wall

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