CN102587354A

CN102587354A - Method for enhancing soil retaining of soil nails between fender posts in soft soil

Info

Publication number: CN102587354A
Application number: CN2012100310403A
Authority: CN
Inventors: 张仲文; 华学严; 李小玥; 杨伟
Original assignee: Zhongtian Construction Group Co Ltd
Current assignee: Zhongtian Construction Group Co Ltd
Priority date: 2012-02-13
Filing date: 2012-02-13
Publication date: 2012-07-18

Abstract

The invention provides a method for enhancing soil retaining of soil nails between fender posts in soft soil, which includes the following steps: step 1 enabling soil mass between two adjacent drilled poured fender posts to be constructed to the shape of a circular arc recessed inwards and tangential to outer edges of the two adjacent drilled poured fender posts; step 2 spraying a first layer of concrete; step 3 hitting soil nails into the soil mass from the surface of the first layer of concrete; step 4 arranging a steel bar attached to the outer wall of the first layer of concrete between the two adjacent drilled poured fender posts along the vertical direction to form a main reinforcing bar; step 5 sequentially arranging horizontal steel bars the two ends of which are respectively abutted against the two adjacent drilled poured fender posts along the main reinforcing bar from top to bottom, enabling the main reinforcing bar and the horizontal steel bars to form steel bar meshes and enabling the soil tails to be welded with adjacent horizontal steel bars; and step 6 spraying or pouring a second layer of concrete in a formwork mode on the surface of the steel bar meshes. The method is capable of effectively preventing the soil mass between the drilled poured fender posts from falling and ensuring safety of subsequent construction.

Description

Soil nailing enhancing retaining indigenous method between fender post in a kind of weak soil

Technical field

The present invention relates to the realm of building construction, be specifically related in a kind of weak soil that soil nailing strengthens the retaining indigenous method between fender post.

Background technology

During the soft soil foundation pit soil excavation, bored pile is set as going along with sb. to guard him soil-baffling structure, goes along with sb. to guard him and have certain headroom crack between the bored pile; The landing phenomenon takes place or flows phenomenons such as soil, flowing water in the soil body easily therebetween; Particularly in weak soil, because the landing phenomenon takes place the stream plasticity of mud and mucky soil more easily, the landing soil body can injure the constructor; And the soil body of cleaning landing can influence follow-up construction, and influences safety of construction.Therefore need to adopt effectively retaining indigenous method, prevent the landing of the soil body between bored pile, guarantee follow-up safety of construction.

Summary of the invention

Technical problem to be solved by this invention is to provide in a kind of weak soil that soil nailing strengthens the retaining indigenous method between fender post, can prevent the landing of the soil body between bored pile effectively, guarantees follow-up safety of construction.

For solving above-mentioned existing technical problem, the present invention adopts following scheme: soil nailing enhancing retaining indigenous method between fender post in a kind of weak soil may further comprise the steps:

Step 1: two adjacent rhizospheres are protected the soil body between the bored pile accomplish the tangent circular arc of outer rim inwardly recessed and that protect bored pile with two adjacent rhizospheres;

Step 2: spray the first floor concrete in the soil body surface that trims;

Step 3: after treating the final set of first floor concrete, throw soil nailing into to the soil body, make the first floor concrete fix from the first floor concrete surface;

Step 4: protect between the bored pile reinforcing bar of fitting at two adjacent rhizospheres and form main muscle along vertical direction setting and first floor outer walls of concrete;

Step 5: set gradually two ends from top to bottom and two adjacent rhizospheres protect the transverse reinforcement that bored pile holds out against respectively along main muscle; And with a transverse reinforcement and the colligation of main muscle employing bundle silk; Said transverse reinforcement curves the circular arc that fits with the first floor concrete, and to protect the outer rim of bored pile tangent with two adjacent rhizospheres, and main muscle and transverse reinforcement form reinforced mesh; Soil nailing and the welding of adjacent transverse reinforcing bar make reinforced mesh fix;

Step 6: perhaps adopt formwork way to build second layer concrete at the reinforced mesh jet surface.

As preferably, the main muscle in the said step 4 adopts Φ 12150 reinforcing bars.

As preferably, the transverse reinforcement in the said step 5 adopts Φ 6300 reinforcing bars.

As preferably, first floor concrete in the said step 2 and the second layer concrete in the step 6 are the thick C15 concrete of 30mm.

As preferably, said step 1, step 2, step 3, step 4, step 5, step 6 are carried out with the excavation progress of the soil body.

As preferably, the main muscle in the vertical direction of said step 4 adopts the segmentation setting.

Beneficial effect:

The present invention adopts technique scheme to provide in a kind of weak soil that soil nailing strengthens the retaining indigenous method between fender post, has prevented the landing of the soil body between bored pile effectively, has guaranteed follow-up safety of construction.

Description of drawings

Fig. 1 is the structural representation of the fender post behind employing the present invention;

Fig. 2 is the sectional view of A-A face among Fig. 1.

The specific embodiment

As shown in Figure 1, before foundation ditch 2 soil excavations, build earlier and go along with sb. to guard him bored pile 1, and capping beam 3 is set going along with sb. to guard him bored pile 1 top.As depicted in figs. 1 and 2, then in a kind of weak soil of providing of embodiment of the present invention between fender post soil nailing strengthen the retaining indigenous method, may further comprise the steps:

Step 1: two adjacent rhizospheres are protected the soil body 4 between the bored pile 1 accomplish the tangent circular arc of outer rim inwardly recessed and that protect bored pile 1 with two adjacent rhizospheres;

Step 2: at the soil body that trims 4 jet surface first floor concrete, said first floor concrete is the thick C15 concrete of 30mm;

Step 3: after treating the final set of first floor concrete, throw soil nailing 7 into to the soil body, make the first floor concrete fix from the first floor concrete surface;

Step 4: protect between the bored pile 1 Φ 12150 reinforcing bars of fitting at two adjacent rhizospheres and form main muscle 5 along vertical direction setting and first floor outer walls of concrete;

Step 5: set gradually two ends from top to bottom and two adjacent rhizospheres protect Φ 6300 transverse reinforcements 6 that bored pile 1 holds out against respectively along main muscle 5; And with a transverse reinforcement 6 and main muscle 5 employing bundle silk colligations; Said transverse reinforcement 6 curves the circular arc that fits with the first floor concrete, and to protect the outer rim of bored pile 1 tangent with two adjacent rhizospheres, and main muscle 5 forms reinforced mesh with transverse reinforcement 6; Soil nailing 7 and 6 welding of adjacent transverse reinforcing bar make reinforced mesh fix;

Step 6: perhaps adopt formwork way to build second layer concrete at the reinforced mesh jet surface, said second layer concrete is the thick C15 concrete of 30mm.

Said step 1, step 2, step 3, step 4, step 5, step 6 are carried out with the excavation progress of the soil body.When foundation ditch 2 degree of depth were dark, the main muscle in the vertical direction of step 4 adopted the segmentation setting.Concrete strength grade of the first floor concrete and the second layer and thickness are looked the actual conditions adjustment.The diameter and the spacing of main muscle 5, transverse reinforcement 6 are decided by on-site actual situations, and soil nailing 7 length and spacing are looked soil pressure and decided.Prevent the landing of the soil body between bored pile effectively, guaranteed follow-up safety of construction.

Claims

In the weak soil between fender post soil nailing strengthen the retaining indigenous method, it is characterized in that: may further comprise the steps:

Step 1: two adjacent rhizospheres are protected the soil body between the bored pile accomplish the tangent circular arc of outer rim inwardly recessed and that protect bored pile with two adjacent rhizospheres;

Step 2: spray the first floor concrete in the soil body surface that trims;

Step 3: after treating the final set of first floor concrete, throw soil nailing into to the soil body, make the first floor concrete fix from the first floor concrete surface;

Step 4: protect between the bored pile reinforcing bar of fitting at two adjacent rhizospheres and form main muscle along vertical direction setting and first floor outer walls of concrete;

Step 5: set gradually two ends from top to bottom and two adjacent rhizospheres protect the transverse reinforcement that bored pile holds out against respectively along main muscle; And with a transverse reinforcement and the colligation of main muscle employing bundle silk; Said transverse reinforcement curves the circular arc that fits with the first floor concrete, and to protect the outer rim of bored pile tangent with two adjacent rhizospheres, and main muscle and transverse reinforcement form reinforced mesh; Soil nailing and the welding of adjacent transverse reinforcing bar make reinforced mesh fix;

Step 6: perhaps adopt formwork way to build second layer concrete at the reinforced mesh jet surface.
2. soil nailing enhancing retaining indigenous method between fender post in a kind of weak soil according to claim 1, it is characterized in that: the main muscle in the said step 4 adopts Φ 12150 reinforcing bars.
3. soil nailing enhancing retaining indigenous method between fender post in a kind of weak soil according to claim 1, it is characterized in that: the transverse reinforcement in the said step 5 adopts Φ 6300 reinforcing bars.
4. soil nailing enhancing retaining indigenous method between fender post in a kind of weak soil according to claim 1, it is characterized in that: first floor concrete in the said step 2 and the second layer concrete in the step 6 are the thick C15 concrete of 30mm.
5. soil nailing enhancing retaining indigenous method between fender post in a kind of weak soil according to claim 1, it is characterized in that: said step 1, step 2, step 3, step 4, step 5, step 6 are carried out with the excavation progress of the soil body.
6. soil nailing enhancing retaining indigenous method between fender post in a kind of weak soil according to claim 1, it is characterized in that: the main muscle in the vertical direction of said step 4 adopts the segmentation setting.