CN110106888A - It is a kind of to exempt from horizontally-supported self-stabilization type foundation pit enclosure support construction construction method - Google Patents

It is a kind of to exempt from horizontally-supported self-stabilization type foundation pit enclosure support construction construction method Download PDF

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Publication number
CN110106888A
CN110106888A CN201910260995.8A CN201910260995A CN110106888A CN 110106888 A CN110106888 A CN 110106888A CN 201910260995 A CN201910260995 A CN 201910260995A CN 110106888 A CN110106888 A CN 110106888A
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China
Prior art keywords
construction
foundation pit
reinforcement block
reaming
horizontally
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CN201910260995.8A
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Chinese (zh)
Inventor
刘侨
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刘侨
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Priority to CN201910260995.8A priority Critical patent/CN110106888A/en
Publication of CN110106888A publication Critical patent/CN110106888A/en
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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00Excavations; Bordering of excavations; Making embankments
    • E02D17/02Foundation pits
    • E02D17/04Bordering surfacing or stiffening the sides of foundation pits

Abstract

Exempt from horizontally-supported self-stabilization type foundation pit enclosure support construction construction method the invention discloses a kind of, comprising the following steps: position and the structural drawings of reinforcement block: surveying setting-out, construction guidance slot are designed according to foundation depth;With chute forming machine grooving;According to the position of reinforcement block in design drawing and structure, the radial Local Symmetric reaming in grooving with broaching equipment: the steel reinforcement cage of foundation pit enclosure structure and reinforcement block is processed according to design drawing, and is installed in place;It is poured concrete;By step 1~six, successively along the length direction section construction of building enclosure, until building enclosure construction is completed;The earth excavation after building enclosure reaches design strength.The invention has the benefit that the present invention designs reinforcement block on foundation pit enclosure structure, the principle for utilizing weight platform top soil pressure restraining structure to be displaced to free face by balance weight retaining wall, weight platform is added in building enclosure and forms building enclosure from steady, so as to avoid the effect for needing horizontal restraint power.

Description

It is a kind of to exempt from horizontally-supported self-stabilization type foundation pit enclosure support construction construction method
Technical field
The present invention relates to engineering construction field more particularly to a kind of exempt from horizontally-supported self-stabilization type foundation pit enclosure support construction Construction method.
Background technique
Currently, common foundation pit enclosure mode is that the road pile foundation+N steel/concrete support or the road diaphragm wall+N steel/concrete support, support Construction had not only spent a large amount of man-machine material and time, but also was unearthed to foundation pit and the construction of structure causes greatly to interfere, and work efficiency is extremely low, is The problem of often perplexing construction party in construction;And anchor cable is also often prohibited because being related to the outer underground space of red line.
Summary of the invention
Purpose of the present invention word is, in view of the deficiencies of the prior art, provides a kind of utilize by balance weight retaining wall and weighs What the top Chong Tai soil pressure restraining structure was displaced to free face exempts from horizontally-supported self-stabilization type foundation pit enclosure support construction construction party Method.
The technical solution adopted by the present invention are as follows: a kind of to exempt from horizontally-supported self-stabilization type foundation pit enclosure support construction construction party Method, comprising the following steps:
Step 1: designing position and the structural drawings of reinforcement block according to foundation depth:
Step 2: surveying setting-out, construction guidance slot;
Step 3: with chute forming machine grooving;
Step 4: with broaching equipment, radial part is right in grooving according to the position of reinforcement block in design drawing and structure Claim reaming:
Step 5: processing the steel reinforcement cage of foundation pit enclosure structure and reinforcement block according to design drawing, and install in place;
Step 6: casting concrete: pouring rear foundation pit enclosure structure and be an integral structure with reinforcement block;
Step 7: step 1~six are pressed, successively along the length direction section construction of building enclosure, until building enclosure is constructed It completes;
Step 8: the earth excavation after building enclosure reaches design strength;
Step 9: the reinforcement block on the inside of foundation pit is abolished, subsequent next working procedure.
According to the above scheme, the reinforcement block upper surface is horizontal.
According to the above scheme, a reinforcement block includes two reinforcement units for being symmetrically divided into grooving two sides.
According to the above scheme, in step 4, expanding method the following steps are included: 1), broaching equipment is in place, reach reaming Reaming scraper bowl is opened in position, starts reaming;2) reaming effect and position, are checked with steel reinforcement cage of verifying;3), right after the completion of reaming Pit slot carries out borehole cleaning cleaning reaming and generates dregs.
According to the above scheme, in step 5, the installation method of steel reinforcement cage are as follows: reinforcing bar first is transferred into reinforcement block side crossheading direction Cage rotates steel reinforcement cage after in place, the reinforcing bar with reinforcement block is placed on Swiveling Rebar cage on the outside of foundation pit, is located at reinforcement block steel reinforcement cage In grooving reaming.
According to the above scheme, geology is reinforced using reinforcement measure at reaming.
The invention has the benefit that traditional foundation pit construction engineering method is horizontally-supported right using the road fender post (diaphragm wall)+N Foundation pit is gone along with sb. to guard him, and horizontally-supported construction was not only time-consuming, but also is unearthed to foundation pit and is caused extreme influence, and construction efficiency is extremely low, entirely Construction cost is higher.The present invention designs reinforcement block on foundation pit enclosure structure, utilizes weight platform top by balance weight retaining wall The principle that soil pressure restraining structure is displaced to free face adds weight platform in building enclosure side and forms building enclosure from steady, It is horizontally-supported so as to avoid needing, substantially increase construction efficiency.
Detailed description of the invention
Fig. 1 is flow diagram of the invention.
Fig. 2 is guide groove construction schematic diagram in the present invention.
Fig. 3 is trenching construction schematic diagram in the present invention.
Fig. 4 is local reaming schematic diagram in the present invention.
Fig. 5 is cloth muscle schematic diagram in the present invention.
Fig. 6 is the placement process schematic diagram of steel reinforcement cage in the present invention.
Fig. 7 is the schematic diagram in the present invention in foundation pit after reinforcement unit excision.
Wherein: 1, reinforcement block;2, grooving;3, guide groove;4, steel reinforcement cage;5, reaming.
Specific embodiment
For a better understanding of the present invention, the present invention is further described in the following with reference to the drawings and specific embodiments.
It is as shown in Figure 1 a kind of to exempt from horizontally-supported self-stabilization type foundation pit enclosure support construction construction method, including following step It is rapid:
Step 1: designing position and the structural drawings of reinforcement block 1 according to foundation depth: in the present embodiment, the reinforcement block 1 Upper surface is horizontal, and a reinforcement block 1 includes two reinforcement units for being symmetrically divided into 2 two sides of grooving;
Step 2: surveying setting-out, construction guidance slot 3, as shown in Figure 2;
Step 3: with chute forming machine grooving 2, as shown in Figure 3;
Step 4: according to the position of reinforcement block 1 and structure in design drawing, it is radial local in grooving 2 with broaching equipment Symmetrical reaming 5, reaming radius also consider geological state, as shown in Figure 4:
Specific reaming procedure are as follows: reaming scraper bowl, beginning reaming are opened in 1, broaching equipment is in place, arrival reaming position;2, Reaming effect and position are checked with steel reinforcement cage 4 of verifying (making steel reinforcement cage 4 of verifying by design reaming outer diameter);3, right after the completion of reaming Pit slot carries out borehole cleaning and clears up reaming part dregs;
Step 5: processing the steel reinforcement cage 4 of foundation pit enclosure structure and reinforcement block 1 according to design drawing, and install, such as schemes in place Shown in 5 and 6: since 1 side of reinforcement block to 4 other side width of steel reinforcement cage is greater than 2 width of grooving, therefore needing first by 1 side crossheading of reinforcement block Steel reinforcement cage 4 is transferred in direction, rotates steel reinforcement cage 4 after in place, the reinforcing bar with reinforcement block 1 is placed on Swiveling Rebar cage 4 on the outside of foundation pit, is made The steel reinforcement cage 4 of reinforcement block 1 is located in 2 reaming of grooving;In the present invention, the arrangement of reinforcement of reinforcement block 1 need to according to different geology stress come into Row design;
Step 6: casting concrete: pouring rear foundation pit enclosure structure and be an integral structure with reinforcement block 1;
Step 7: step 1~six are pressed, successively along the length direction section construction of building enclosure, until building enclosure is constructed It completes;
Step 8: the earth excavation after building enclosure reaches design strength;
Step 9: abolishing the concrete poured in reaming on the inside of foundation pit, namely the reinforcement block 1 inside foundation pit is protruded into, then Next working procedure, as shown in Figure 7.
In the present invention, reinforcement block 1 is used as bearing platform, and reaming upper surface is plane.The size of reinforcement block 1 and interval will bases Different geology and foundation depth difference carry out force design inspection and calculate, and different elevations should be different, but for it is easy for construction can To be designed using worst come uniform sizes.
In the present invention, for collapse hole at prevention reaming, the reinforcement measures such as concrete stake can be used at the poor place of geology and reinforce geology.
In the present invention, joint because reaming needs, new grooving steel reinforcement cage and construction reinforced bar cage spacing it is larger through inspection calculate by Power need to add stake reinforcing when dangerous;Joint can use grouting and reinforcing measures of preventing water on the outside of foundation pit when necessary.
It should be understood that above-mentioned specific embodiment of the invention is used only for exemplary illustration or explains of the invention Principle, but not to limit the present invention.Therefore, that is done without departing from the spirit and scope of the present invention is any Modification, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.In addition, appended claims purport of the present invention Covering the whole variations fallen into attached claim scope and boundary or this range and the equivalent form on boundary and is repairing Change example.

Claims (6)

1. a kind of exempt from horizontally-supported self-stabilization type foundation pit enclosure support construction construction method, which comprises the following steps:
Step 1: designing position and the structural drawings of reinforcement block according to foundation depth:
Step 2: surveying setting-out, construction guidance slot;
Step 3: with chute forming machine grooving;
Step 4: with broaching equipment, radial Local Symmetric expands in grooving according to the position of reinforcement block in design drawing and structure Hole:
Step 5: processing the steel reinforcement cage of foundation pit enclosure structure and reinforcement block according to design drawing, and install in place;
Step 6: casting concrete;
Step 7: step 1~six are pressed, successively along the length direction section construction of building enclosure, until building enclosure has been constructed At;
Step 8: the earth excavation after building enclosure reaches design strength;
Step 9: the reinforcement block on the inside of foundation pit is abolished, subsequent next working procedure.
2. exempting from horizontally-supported self-stabilization type foundation pit enclosure support construction construction method as described in claim 1, which is characterized in that The reinforcement block upper surface is horizontal.
3. exempting from horizontally-supported self-stabilization type foundation pit enclosure support construction construction method as described in claim 1, which is characterized in that One reinforcement block includes two reinforcement units for being symmetrically divided into grooving two sides.
4. exempting from horizontally-supported self-stabilization type foundation pit enclosure support construction construction method as described in claim 1, which is characterized in that In step 4, expanding method the following steps are included: 1), broaching equipment is in place, reach reaming position, open reaming scraper bowl, Start reaming;2) reaming effect and position, are checked with steel reinforcement cage of verifying;3), borehole cleaning cleaning is carried out to pit slot after the completion of reaming to expand Hole generates dregs.
5. exempting from horizontally-supported self-stabilization type foundation pit enclosure support construction construction method as described in claim 1, which is characterized in that In step 5, the installation method of steel reinforcement cage are as follows: steel reinforcement cage, rear Swiveling Rebar in place are first transferred into reinforcement block side crossheading direction Reinforcing bar with reinforcement block is placed on Swiveling Rebar cage on the outside of foundation pit by cage, is located at reinforcement block steel reinforcement cage in grooving reaming.
6. exempting from horizontally-supported self-stabilization type foundation pit enclosure support construction construction method as described in claim 1, which is characterized in that Geology is reinforced using reinforcement measure at reaming.
CN201910260995.8A 2019-04-02 2019-04-02 It is a kind of to exempt from horizontally-supported self-stabilization type foundation pit enclosure support construction construction method Pending CN110106888A (en)

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CN201910260995.8A CN110106888A (en) 2019-04-02 2019-04-02 It is a kind of to exempt from horizontally-supported self-stabilization type foundation pit enclosure support construction construction method

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Application Number Priority Date Filing Date Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110984178A (en) * 2019-12-24 2020-04-10 惠州尚翔建设工程有限公司 Foundation pit supporting structure and construction method thereof

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203782684U (en) * 2014-04-09 2014-08-20 中冶集团武汉勘察研究院有限公司 Anti-skid pile provided with crossbeam
CN104018495A (en) * 2014-05-13 2014-09-03 中冶集团武汉勘察研究院有限公司 Bilateral haunched beam circular section anti-slide pile and construction method thereof
CN104775439A (en) * 2015-04-20 2015-07-15 中建南方投资有限公司 Foundation pit support and water stop integrated structure and construction method thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203782684U (en) * 2014-04-09 2014-08-20 中冶集团武汉勘察研究院有限公司 Anti-skid pile provided with crossbeam
CN104018495A (en) * 2014-05-13 2014-09-03 中冶集团武汉勘察研究院有限公司 Bilateral haunched beam circular section anti-slide pile and construction method thereof
CN104775439A (en) * 2015-04-20 2015-07-15 中建南方投资有限公司 Foundation pit support and water stop integrated structure and construction method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110984178A (en) * 2019-12-24 2020-04-10 惠州尚翔建设工程有限公司 Foundation pit supporting structure and construction method thereof

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